• 한국버섯학회지
• /
• 제7권3호
• /
• pp.91-97
• /
• 2009

느타리버섯의 배지에 철, 고춧가루, 은행잎을 첨가하였을 때 버섯의 생육과 생리활성을 분석한 결과는 다음과 같다. 수량은 춘추 품종에 철 34.9g을 첨가하였을 때 144g으로 가장 높았고, 나머지 품종간에는 차이가 없었으며, 34.9g 및 174.5g 처리시 17.4g 처리에 비해 수량이 높은 경향이었다. 자실체와 배지에 포함된 무기물의 함량은 종류별로 차이가 있었으며, 배지중 철의 함량이 증가하여도 자실체내의 철의 함량은 0.31~0.43mg/kg으로 거의 일정하게 유지되었다. 배지에 포함된 고춧가루의 함량이 많아질수록 자실체에 포함된 캡사이신의 함량도 많아졌으며, 수한품종에서 6mg/100g으로 가장 많이 전이되었다. 철이나 고추를 첨가한 배지에서 재배한 버섯에서 페놀성 화합물의 함량이 높게 나타났으며, 항산화력과 총 페놀성 화합물 함량, 환원력과 총페놀성 화합물 함량, 금속이온 제거능과 페놀성 화합물의 함량 간에는 서로 영향을 미치지 않는 경향이었다. Macrophage 활성화능은 수한 품종이 다른 품종에 비해 높은 경향이었다.

• ETRI Journal
• /
• 제36권5호
• /
• pp.714-720
• /
• 2014

In this paper, we propose the use of data-driven probabilistic utterance-level decision logic to improve Weighted Finite State Transducer (WFST)-based endpoint detection. In general, endpoint detection is dealt with using two cascaded decision processes. The first process is frame-level speech/non-speech classification based on statistical hypothesis testing, and the second process is a heuristic-knowledge-based utterance-level speech boundary decision. To handle these two processes within a unified framework, we propose a WFST-based approach. However, a WFST-based approach has the same limitations as conventional approaches in that the utterance-level decision is based on heuristic knowledge and the decision parameters are tuned sequentially. Therefore, to obtain decision knowledge from a speech corpus and optimize the parameters at the same time, we propose the use of data-driven probabilistic utterance-level decision logic. The proposed method reduces the average detection failure rate by about 14% for various noisy-speech corpora collected for an endpoint detection evaluation.

• ETRI Journal
• /
• 제38권6호
• /
• pp.1190-1196
• /
• 2016

We propose a new bandpass filter (BPF)-based online channel normalization method to dynamically suppress channel distortion when the speech and channel noise components are unknown. In this method, an adaptive modulation frequency filter is used to perform channel normalization, whereas conventional modulation filtering methods apply the same filter form to each utterance. In this paper, we only normalize the two mel frequency cepstral coefficients (C0 and C1) with large dynamic ranges; the computational complexity is thus decreased, and channel normalization accuracy is improved. Additionally, to update the filter weights dynamically, we normalize the learning rates using the dimensional power of each frame. Our speech recognition experiments using the proposed BPF-based blind channel normalization method show that this approach effectively removes channel distortion and results in only a minor decline in accuracy when online channel normalization processing is used instead of batch processing

• Elastomers and Composites
• /
• 제36권1호
• /
• pp.37-43
• /
• 2001

실리카와 카본블랙으로 보강된 SBR 배합물의 가황 특성과 bound rubber 함량 그리고 가황물의 물성에 보강제의 조성비가 미치는 영향을 연구하였다. 고무 배합물의 보강제 총 함량은 80.0 phr 이다. Bound rubber 함량은 실리카 함랑비가 증가할수록 증가하였고 점도 역시 증가하였는데, 특히 실리카 함량이 60.0 phr 이상일 때는 점도의 증가폭이 두드러지게 높아졌다. 가황시간은 실리카 함량이 증가할수록 느려졌고 가황 속도도 느려졌다. 실리카 함량비가 증가할수록 델타 토크가 증가함에도 불구하고 모둘러스는 감소하는 경향을 보였다. $60^{\circ}C$에서의 tan ${\delta}$ 값은 실리카 함량이 증가할수록 감소하였다.

• 전자통신동향분석
• /
• 제37권4호
• /
• pp.70-80
• /
• 2022

With the rapid growth in media service platforms providing broadcast programs or content services, content production has become more important and competitive. As a strategy to meet the diverse needs of global consumers for a variety of content and to retain them as long-term repeat customers, global over-the-top service providers are increasing not only the number of content productions but also their production efficiency. Moreover, a considerable amount of scene composition in the flow of content production work appears to be combined with rendering technology from a game engine and converted to object-based computer programming, thereby enhancing the creativity, diversity, quality, and efficiency of content production. This study examines the latest technology trends in content production such as virtual studio technology, which has emerged as the center of content production, the use cases in various fields of artificial intelligence, and the metadata standards for content search or scene composition. This study also examines the possibility of using object-based computer programming as one of the future candidate technologies for content production.

• ETRI Journal
• /
• 제26권5호
• /
• pp.452-466
• /
• 2004

As the number of broadcasting channels and programs increases rapidly, the importance of personalized service has been emphasized. In this paper, we propose a practical framework of metadata broadcasting to provide personalized service according to user preferences and various terminal/network conditions. First, we present an overall system architecture of a metadata broadcasting system and then propose several core technologies (particularly in the parts of metadata authoring, metadata encoding, and metadata-based personalized content consumption). For interoperability, the proposed solution is designed to be compliant with the relevant standards of the TV-Anytime Forum, MPEG-7 Systems, and MPEG-2 Systems. Considering a home network environment, we also propose a metadata-based content adaptation scheme. Each component technology has been implemented individually, integrated into an end-to-end prototype broadcasting system, and successfully tested with a set of personalized service scenarios that are also developed in this study.

• 유통과학연구
• /
• 제22권8호
• /
• pp.109-124
• /
• 2024

Purpose: This study examines short-platform content that is becoming more popular on social media. This study investigates the relationship between short-form content experience, consumer participation behavior, and consideration set. Furthermore, the mediating effect on empathy factors was confirmed during consumers' experience with short-form content. Data and methodology: Prior studies were reviewed, and hypotheses were developed. Consumers who had watched and shared short-form content within the previous three months were targeted to achieve the study's goal. A structured questionnaire was used to conduct the survey. Results: First, users of short-platform content with practical, playful, and emotional value did not confirm a positive effect on consumer participation behavior. However,short-form content with social value positively impacted consumer participation behavior. Second, consumer participation in short-form content was confirmed to positively affect the consideration set. Third, in terms of the mediating effect of empathy factors, short-platform content with practical, social, and emotional values partially mediates consumer participation behavior, whereas short-platform content with playfulness value completely mediates consumer participation behavior. Conclusions: The results of this study have academic and practical implications for the recent marketing field. In particular, research has been conducted in the field of digital marketing, which has recently changed rapidly.

• 생물환경조절학회지
• /
• 제21권4호
• /
• pp.392-397
• /
• 2012

참죽나무 순채 조기생산을 위하여 하우스와 노지재배에서 생산된 잎의 무기성분을 분석한 결과는 다음과 같다. 참죽나무 순채의 생장속도는 노지에 비하여 하우스 재배에서 다소 빠른 경향이었고, 정아의 경우 초장, 가지수 등 생육과 생체 중, 엽록소 함량 등 품질은 노지와 하우스재배 처리 간 큰 차이가 없었다. 참죽나무 순채의 색도(a값)는 측아보다는 정아에서 적색도가 다소 높았으나 하우스와 노지재배 간에는 차이가 거의 없었다. 참죽나무 정아 및 측아의 pH는 5.7~6.2 정도였고 N 함량은 측아의 평균 $500.5mg{\cdot}kg^{-1}$에 비해 정아에서 3.1배 많았고, 노지재배($1,430mg{\cdot}kg^{-1}$)보다는 하우스 재배에서 1.2배 많았다. P, Ca, Mg 및 Fe 함량도 노지재배에 비하여 하우스 재배에서 유의성 있게 높았는데, P는 1.1배, Ca는 1.7배, Mg는 2.0배, Fe는 2.3배 정도 많았으나 K 함량은 하우스 재배의 $2.94mg{\cdot}kg^{-1}$에 비하여 노지재배에서 1.6배 많았다. Ascorbic acid 함량은 하우스 측아에서 $1,461mg{\cdot}kg^{-1}$으로 가장 높았고 노지 측아, 노지 정아, 하우스 정아 순이었다. 이상의 결과를 종합하면 고품질 참죽나무 순채 생산을 위해서 하우스 재배가 필요한 것으로 생각된다.

• Geomechanics and Engineering
• /
• 제21권6호
• /
• pp.537-549
• /
• 2020

The presence of cracks changes the water content pattern during seepage through a cracked soil as compared to that of intact soil. In addition, several different crack networks may form in one soil type. These two factors result in a variation of water contents in the soil matrix part of a cracked soil during seepage. This paper presents an investigation of the effect of crack network representation on the water content of the soil matrix part of cracked soil using numerical models. A new method for the numerical generation of crack networks incorporating connections among crack endpoints was developed as part of the investigation. Numerical analysis results indicated that the difference in the point water content was large, whereas the difference in the average water content was relatively small, indicating the uniqueness of the crack network representation on the average water content of the soil matrix part of cracked soil.

• 한국식품조리과학회지
• /
• 제31권3호
• /
• pp.288-295
• /
• 2015

In this study, we investigate the physicochemical characteristics of dried bracken (Pteridium aquilinum Kuhn) harvested in Namhae. The moisture, ash, crude protein and crude lipid content was $10.79{\pm}0.31%$, $6.16{\pm}0.04%$, $33.20{\pm}0.40%$ and $2.45{\pm}0.27%$, respectively. The total mineral (Ca, Fe, K, Mg, Na, Mn) content was $36720.1{\pm}495.7mg/kg$, with K being the highest at $31890.0{\pm}503.8mg/kg$. The total free amino acid content was 704.41 mg/100 g, the amount of methionine, citrulline and sarcosine being higher than the others. The water and 50% ethanol extracts from the dried bracken were evaluated for the total poly phenolic compound content, antioxidant activity and xanthine oxidase and ${\alpha}$-glucosidase inhibitory activity. The total polyphenol content in the 50% ethanol extract ($1574.86{\pm}18.31mg/100g$) was higher than in the water extract ($1240.24{\pm}16.32mg/100g$). The DPPH and ABT radical scavenging activity was increased according to the concentration of bracken extract, and the activity in the 50% ethanol extract was higher than in the water extract. In addition, the xanthine oxidase and ${\alpha}$-glucosidase inhibitory activity was also higher in the 50% ethanol extract than in the water extract. In conclusion, bracken has great antioxidative and antidiabetic effects and can be used as a preventive agent for oxidation and diabetes.