코로나 사태 이후 공연예술계는 ‘초지능화’와 ‘초연결성’의 특징으로 대표되는 메타버스에 주목 하기 시작했다. 직접 만나서 소통할 수 없는 비대면적 상황은 현실세계와 가상공간을 연결해 주는 메타버스 플랫폼 전시 공연 활성화에 큰 영향을 끼쳤다. 코로나 사태가 끝난 이후에도 공연예술계는 다양하고 실험적인 온-오프라인 공연의 형태로 해당 기술을 활용한 다양한 프로 젝트 전시들을 선보이고 있다. 이처럼 실감 콘텐츠와 가상현실을 접목한 VR, XR 기술들은 빠 르게 실감 콘텐츠와 전시공연분야에 접목되며 실험적이고 다양한 공연과 전시를 선보이고 있 다. 메타버스 플랫폼을 활용한 전시와 공연들이 관객들이 어떠한 방식으로 다가가고 있는지 실감 콘텐츠 공연사례들을 분석하고, 가상현실이 일상화되고 있는 요즘, 전시와 공연 예술 분 야의 변화의 방향을 살펴본다.

Salivary gland dysfunction is a common complication of diabetes. Decreased saliva production and changes in saliva composition may cause oral diseases. Reactive oxygen species (ROS) generation in the salivary glands results in the loss of acinar cells and decreased saliva secretion. Glucagon-like peptide 1 (GLP-1) is the incretin hormone that regulates blood glucose level and can suppress ROS production and inflammation through its antioxidant effects. Dipeptidyl peptidase-4 (DPP-4) is an enzyme that breaks down GLP-1. In this study, we evaluated the pathological role of DPP-4 and GLP-1 on salivary gland dysfunction in type 2 diabetic db/db mice. We observed reduced salivary secretion and histopathological alteration of salivary glands in the db/db mice. The increased DPP-4 and decreased GLP-1 levels in the salivary glands were also detected in the db/db mice. Furthermore, the db/db mice had increased apoptosis and oxidative injury in salivary glands. There was an accumulation of advanced glycation end products and mucus in the salivary glands of the db/db mice. In conclusion, these results showed the possible involvement of DPP-4 and GLP-1, leading to increased ROS-induced apoptosis in diabetes-related salivary gland dysfunction. DPP-4 and GLP-1 may be a pharmacological target for patients with diabetes-related salivary gland dysfunction.

토마토반점위조바이러스(TSWV)는 총채벌레가 매개하는 대표적인 바이러스로 고추 등 여러작물에서 심각 한 피해를 준다. 노지고추에서 토마토반점위조바이러스 발생 경감을 위한 총채벌레 방제시기를 설정하고자 시기별 총채벌레 발생량과 토마토반점위조바이러스병 발생량을 조사하였다. 2023년 전북 익산 노지 고추포장 에서 청색끈끈이트랩을 이용하여 총채벌레 발생량을 조사한 결과 4월 상순부터 채집되기 시작하여 5월 하순과 6월 하순에 발생최성기를 보였다. 반면 고추 꽃에서는 정식 2주후부터 꽃당 10마리 이상 관찰되었다. 토마토반점 위조바이러스병은 정식 30일 이후 증상이 발생하기 시작하여 빠르게 확산되는 경향이었다. 따라서 노지고추에 서 토마토반점위조바이러스병 경감을 위하여 총채벌레 방제를 활착 이후부터 시작하는 것이 좋을 것으로 판단 되었다.

기후변화 대응과 새로운 소득작물로 아열대작물이 도입되어 재배면적이 증가하고 있다. 그린빈은 아메리카 중남부가 원산지인 콩과 작물로 미성숙 꼬투리를 다양한 요리에 이용하는데 최근 수요가 증가하면서 재배면적 이 확대되고 있다. 새로운 작물이 도입됨에 따라 안정재배를 위한 방제 대상 해충을 설정하기 위하여 재배시기별 해충 종류와 피해정도를 조사하였다. 4월 중순에 파종한 그린빈에서는 생육초기부터 총채벌레 발생이 많았으 며, 5월 하순 이후 발생밀도가 급격하게 증가하는 경향을 보였다. 7월 상순에 파종한 그린빈에서는 8월 하순부터 아메리카잎굴파리 피해가 증가하여 9월 상순에 피해엽률이 50% 이상으로 발생이 심하였으며, 응애류와 총채벌 레류 발생이 많은 경향이었다.

열대거세미나방이 2019년 국내에 첫 비래한 이후 매년 비래하고 있으며 옥수수 등에서 피해를 주고 있음에 따라 전북지역 주요 옥수수 재배지역에서의 열대거세미나방 발생양상과 약제방제 효과를 조사하였다. 2022년 도에 성페로몬트랩을 이용하여 성충유인량을 조사한 결과 7월 1일 첫 채집되었으며 8월 중순이후 채집량이 증가 하여 9월 중순과 10월 중순에 발생최성기를 보였으며 11월 상순까지 유인되었다. 2022년과 2023년에 식용 옥수 수 재배지역에서 열대거세미나방 유충 피해 조사 결과 6월 수확하는 옥수수에서는 열매피해가 없었으나 9월에 수확하는 옥수수에서는 피해열매율이 30% 이상인 포장들이 관찰되어 재배시기에 따라 피해 정도 차이가 매우 큰 경향이었다. 옥수수 포장에서 열대거세미나방 유충 방제를 위해 2~3령기에 인독사카브 액상수화제를 7일 간격으로 2회 살포한 결과 처리 7일 후 방제효과는 91.7%로 높았다.

With about 80% of the global economy expected to shift to the global market by 2030, exports of reverse direct purchase products, in which foreign consumers purchase products from online shopping malls in Korea, are growing 55% annually. As of 2021, sales of reverse direct purchases in South Korea increased 50.6% from the previous year, surpassing 40 million. In order for domestic SMEs(Small and medium sized enterprises) to enter overseas markets, it is important to come up with export strategies based on various market analysis information, but for domestic small and medium-sized sellers, entry barriers are high, such as lack of information on overseas markets and difficulty in selecting local preferred products and determining competitive sales prices. This study develops an AI-based product recommendation and sales price estimation model to collect and analyze global shopping malls and product trends to provide marketing information that presents promising and appropriate product sales prices to small and medium-sized sellers who have difficulty collecting global market information. The product recommendation model is based on the LTR (Learning To Rank) methodology. As a result of comparing performance with nDCG, the Pair-wise-based XGBoost-LambdaMART Model was measured to be excellent. The sales price estimation model uses a regression algorithm. According to the R-Squared value, the Light Gradient Boosting Machine performs best in this model.

In the era of the 4th Industrial Revolution, Logistic 4.0 using data-based technologies such as IoT, Bigdata, and AI is a keystone to logistics intelligence. In particular, the AI technology such as prognostics and health management for the maintenance of logistics facilities is being in the spotlight. In order to ensure the reliability of the facilities, Time-Based Maintenance (TBM) can be performed in every certain period of time, but this causes excessive maintenance costs and has limitations in preventing sudden failures and accidents. On the other hand, the predictive maintenance using AI fault diagnosis model can do not only overcome the limitation of TBM by automatically detecting abnormalities in logistics facilities, but also offer more advantages by predicting future failures and allowing proactive measures to ensure stable and reliable system management. In order to train and predict with AI machine learning model, data needs to be collected, processed, and analyzed. In this study, we have develop a system that utilizes an AI detection model that can detect abnormalities of logistics rotational equipment and diagnose their fault types. In the discussion, we will explain the entire experimental processes : experimental design, data collection procedure, signal processing methods, feature analysis methods, and the model development.

본 논문은 일반적인 상황이 아닌 전시라는 특수한 환경에서의 영상기반 AI 모션캡쳐 적용방법의 다양한 시도 를 살펴보았다. 이전의 방식을 살펴보면서 다양한 전시 환경과 조건에 따라 활용 가능한 방법을 연구하고, 장 단점을 서술하여 인터렉션 전시공간에 적용 가능한 영상기반 AI 모션캡쳐 모션캡쳐 기술의 필요성과 적용 가 능성을 설명한다. 또한 MIVA 프로젝트를 진행하면서 전시공간이라는 비규격화 된 공간에서의 불편한 점을 파 악하고 이에 대한 대응할 수 있는 기술적인 환경 구성에 대하여 정리하였다. 또한 실제 공간에서 캡쳐 프로그 램을 설치하고 전시에 적용하면서 생기는 문제점을 파악하고 해결하면서 적절하게 적용 가능한 모션캡쳐 기 술 환경 파이프라인을 제안한다.

Declined salivary gland function is commonly observed in patients with diabetes. Advanced glycation end products (AGEs) are believed to contribute to the pathogenesis of diabetes-induces hypofunction of the salivary glands. Polydatin (resveratrol-3-O-β-mono-D-glucoside) is a polyphenol that can be easily accessed from peanut, grape, and red wines. Although polydatin is known to have anti-glycation, anti-oxidation, and anti-inflammation effects, its effect in the salivary gland is not known. In the present study, we evaluated the AGEs burden in the salivary gland in streptozotocin (STZ)-induced diabetic rats and the protective effect of polydatin on diabetes-related salivary hypofunction. Polydatin (50 and 100 mg/kg/day) was orally administered in the STZ-induced diabetic rats for 4 weeks. The results showed that the salivary flow rate of the STZ-induced diabetic rats was reduced compared with that in the normoglycemic control rats. The circulating AGEs in serum and secreted AGEs in saliva increased in the STZ-induced diabetic rats. The reactive oxygen specises (ROS) were highly generated in the salivary gland in these diabetic rats. The salivary gland from the diabetic rats showed increased acinar cell apoptosis compared to normoglycemic control mice. However, polydatin suppressed all of these diabetes-related salivary changes. Overall, polydatin could provide a beneficial option for diabetes-related salivary hypofunction.

The normal feeding approach of goats might be due to their precise anatomical and physiological characteristics of entity, which permit them to be highly selective, to eat legume silages and wild green grass. This review has been designed to consider the grazing behavior, fodder selection, and feed composition of goats. Various herbs and corns consumed by goats have numerous nutritive resources. Based on the general herbaceous intake activities and behavior of goats, they prefer wild grass such as grass grown in the steep hills than soft grass. Because the digestion capacity of cellulose feed has higher digestion level compared to other non-ruminants within rumen and it is advantageous to use wild forest or mountain grass which comprises high proportion of cellulose feed for goat. In South Korea, there are abundant feed resources for goats because of occupying large areas of mountains. Thus, goat production and feeding costs could be reduced if plants are used from the wild forest as a feed for goats relative to grassland grazing. Also, it is expected to contribute in improvement of goat farming with harmonious relationship between the grassland and wild forest while satisfying animal welfare and physiological desires of livestock.

The spray characteristics of two working fluids operating with a bi-fuel injector were investigated. A bi-fuel injector simultaneously sprays two working fluids, both of which possess different properties. An effervescent atomizer containing two separated aerator tubes was employed as the bi-fuel injector. Vegetable oil and kerosene were the working fluids. The mixing ratio and ALR were the experimental parameters. The mixing ratio is the mass fraction of vegetable oil in the total amount of working fluids. The ALR represents the ratio of the atomizing gas to the working fluid mass flow ratio. In order to examine spray characteristics, the spray angle, droplet size distribution, cumulative volume fraction, Sauter Mean Diameter and span factor were measured using a high resolution video camera and a Laser Diffraction Particle Analyzer. From the experimental results, spray angle is decreased with as the ratio of kerosene to vegetable oil in working fluid is increased. Regardless of ALR, SMD was the smallest when the only working fluid was kerosene and uniformity was the most stable when the only working fluid was vegetable oil.

The fuel used in this study, DMM is an oxygen additive containing 42.5% oxygen by weight and dissolved in diesel fuel, also known as methyl alcohol or Dimethoxymethane (CH3-O-CH2-O-CH3). DMM, which is a colorless liquid, shows chemical characteristics of gas-liquid and is also used as a diesel fuel component. In this study, five mixtures were added to the common diesel fuel at DMM addition rates of 2.5, 5, 7.5, 10 and 12.5% by volume. A single cylinder, four strokes, DI diesel engine was used as the test engine. Experimental data were also collected at 24 engine speed-load conditions operating in steady state. The purpose of this experiment was to study the effect of the addition ratio of oxidized fuel mixed in diesel fuel on engine power and exhaust performance. When compared with the common diesel fuel, the exhaust of Smoke was substantially reduced in all DMM mixing ratios. These results indicate that DMM can be an effective blend of diesel fuel and is an environmentally friendly alternative fuel. This study also shows that smoke and NOx emissions can be reduced at the same time through the application of oxygen fuel and EGR.

The spray characteristics of two working fluids operating with a bi-fuel injector were investigated. A bi-fuel injector simultaneously sprays two working fluids, both of which possess different properties. An effervescent atomizer containing two separated aerator tubes was employed as the bi-fuel injector. Vegetable oil and kerosene were the working fluids. The mixing ratio and ALR were the experimental parameters. The mixing ratio is the mass fraction of vegetable oil in the total amount of working fluids. The ALR represents the ratio of the atomizing gas to the working fluid mass flow ratio. In order to examine spray characteristics, the spray angle, droplet size distribution, cumulative volume fraction, Sauter Mean Diameter and span factor were measured using a high resolution video camera and a Laser Diffraction Particle Analyzer. From the experimental results, spray angle is decreased with as the ratio of kerosene to vegetable oil in working fluid is increased. Regardless of ALR, SMD was the smallest when the only working fluid was kerosene and uniformity was the most stable when the only working fluid was vegetable oil.

This study was conducted to evaluate the efficacy of mulberry cake mixed diet on larval growth of Protaetia brevitarsis. As a result of adding mulberry cake to oak fermented sawdust and mulberry fermented sawdust, the survival rate of P. brevitarsis larvae were higher than those of the control when mass rearing larvae. When fed oak fermented sawdust with 3, 5% and 10% of mulberry cake, the cumulative proportion of larvae over 2.5g was 92.9% at 65 days, 90.8% at 55 days, and 96.3% at 45 days after rearing at 25±1℃, respectively. When fed mulberry fermented sawdust with 3%, 5% and 10% of mulberry cake, the cumulative proportion of larvae over 2.5g was 86.2% at 85 days, 90.7% at 75 days, and 91.5% at 75 days after rearing at 25±1℃, respectively.

This study was conducted to evaluate the efficacy of mulberry leaf mixed diet on larval growth of Protaetia brevitarsis. As a result of adding mulberry leaves to oak fermented sawdust, the survival rate of P. brevitarsis larvae were higher than those of the control when mass rearing larvae. When fed oak fermented sawdust with 5%, 10% and 20% of mulberry leaves, the cumulative proportion of larvae over 2.5g was 93.1% at 65 days, 95.6% at 55 days, and 93.9% at 55 days after rearing at 25±1℃, respectively. Also, heavy metals were not detected in larvae of P. brevitarsis fed on mulberry leaves.

This study was conducted to determine the applicability of the shoot growth model to cut roses grown at high temperatures. Two cultivars of cut roses, ‘Antique Curl’ and ‘Beast’, were cultivated in growth chambers set to night/day temperatures of 24/20°C for the control group and 32/28°C for the treatment group. The shoot growth model, which resulted in high coefficients of determination (R2 = 0.80 and 0.62, respectively, for ‘Antique Curl’ and ‘Beast’), was a good predictor of the decrease in the growth of rose shoots for both treatment groups. Although the model produced good results for both the control and treatment groups of ‘Antique Curl’, the accuracy of the model can be improved by using the modified leaf area at the harvest stage. From these results, the model was confirmed to perform well for predicting a decrease in productiveness and quality in cut roses cultivated during summer under high temperatures.