본 연구는 국내 차나무 품종을 대상으로 연평균 기온이 낮은 봉화군에 식재하여, 봉화지역 차나무 재배 가능성을 검토하고자 연구를 수행하였다. 봉화군 시험지 토양 조사 결과, 시험지별 토양의 pH, EC, 치환성양이온, 유효인산은 적정수준이었으며, 유기물 함량은 대체로 낮은 수치로 조사되었 다. 봉화군 시험지 기온 조사 결과, 최저 기온은 소천면이 -14.1℃로 가장 낮았고, 다음으로 춘양면 -12.6℃, 명호면 -12.6℃, -10.2℃ 순으로 모든 시험지는 -10℃ 이하의 낮은 온도로 조사되었다. 차나무 재배 생육평가 결과, 명호면 시험지에서 생육 정도가 가장 우수하였고, 다음으로 소천면, 온실, 춘양면 순으로 조사되었다. 또한, 재배품종 보향과 대조품종 다산은 시험지 생장량과 광합성량이 다른 수종에 비해 높은 것을 확인하였 다. 봉화지역과 하동지역에 식재된 참녹의 주요 생리활성물질인 catechin과 caffeine 함량을 조사한 결과, Catechin 함량은 EGC와 EC, EGCG 함량은 하동이 높게 조사되었고, 반면 ECG는 봉화지역의 참녹이 월등히 높았다. 총 catechin 함량은 봉화 5.23%, 하동 5.22%로 비슷하게 나타났다. Caffeine 함량은 봉화 0.05%, 하동 0.38%로 하동지역의 참녹이 높게 나타났다. 본 연구에서 봉화군 차나무 재배 생육평가 결과 명호면, 소천면이 차나무 재배에 유리할 것이며, 봉화지역 차나무 재배 시 재배품종 보향과 대조품종 다산은 재배 적응성이 높을 것으로 판단된다.

도시 내 기후변화로 인한 이상 기상 현상과 함께 다양한 환경문제의 발생 빈도가 높아지고 있다. 도시의 회복력 향상을 위해서 자연기반해법이 대두되며, 이는 식물의 생육과 밀접한 관련이 있으므로 환경 스 트레스에 회복력이 강한 식물 소재가 요구되고 있다. 본 연구는 식물 소재 중 지피식물 47종을 대상으로 침수 내성을 평가하여 식재 및 관리를 위한 기초자료로 활용하고자 수행되었다. 시험 식물을 3일 및 7일 간 지제부까지 완전히 침수시킨 후 관행의 방법으로 관리하여 생육 변화를 4주간 관찰하였다. 식물의 외관 변화와 대조구와 처리구간의 S/R율(Shoot / Root ratio)차이에 따라 내침수성을 5개 집단으로 구분 하였다. Group A는 ‘곰취’등 28종의 식물로 외관 변화가 없으며, 침수에 의한 영향을 받지 않는다. Group B, C, D 및 E의 17종은 침수에 의한 외관 변화나 S/R율의 차이가 뚜렷이 확인되었다. 특히 ‘구절초’등 4종은 외관의 변화가 뚜렷하고 대조구와 처리구간 S/R율이 4배 수준이며(Group C), ‘눈개승마’는 지상 부가 완전히 고사하였다(Group E). 따라서 침수에 대응한 식재 계획에서는 Group A의 식물을 이용하는 것이 적합할 것으로 판단된다.

This study is to propose ways to improve the system for rational procedures for offshore wind power generation projects. The results of this study are summarized as follows. In order to quickly distribute and develop offshore wind power projects, the permitting period should be shortened through special laws, the government actively intervenes to support the formation and operation of privat-public councils to ensure residents' acceptance. In this way, it can be competitive in the future energy market. Above all, a special law (proposal) related to offshore wind power currently pending in the National Assembly should be passed as soon as possible. Finally, the government and local governments that manage public waters should provide active administrative support based on system improvement measures in consideration of these permits, and the project’s main body should minimize damage to the marine environment and ecosystem. Through these subject-specific roles, offshore wind power generation will be able to reduce carbon emissions and help establish a sustainable energy production system.

양돈산업은 돼지고기 내 웅취발생 예방을 위한 방법으 로 수컷 자돈에게 물리적 거세를 관행적으로 실시해왔다. 그러나 동물복지에 대한 관심이 고조됨에 따라 일부 국가 들에서는 고통 최소화 물리적 거세법 권장 또는 대체 방 법에 대해 연구를 수행하고 있다. 따라서 본 연구에서는 비거세돈(EM; entire male pigs) 및 거세돈(CM; castrated male pigs)에서 이눌린의 급여가 지방조직 내 웅취물질 농도에 미치는 영향을 구명하고자 실시하였다. 시험동물 은 총 26두의 3원 교잡돈(EM, n=18; CM, n=8)을 사용하 였다. 시험 처리구는 3% 이눌린의 급여와 비급여를 설정 하여 총 4개 처리구(EM0, EM3, CM0 및 CM3)로 구성하 였다. 웅취분석을 위해 지방조직은 등지방, 목지방 및 삼 겹지방을 수집하였다. 등지방 내 인돌 농도는 EM0에 비 해 CM3에서 감소하였고(p<0.05) 목지방 및 삼겹지방에서 는 처리구간 차이가 없었다. 지방조직 내 평균 인돌 농도 는 EM0에 비해 EM3, CM0 및 CM3에서 감소하였다 (p<0.05). 등지방 내 스카톨 농도는 CM0, CM3에서 EM0 보다 감소하였다(p<0.05). 또한, 목지방 내 스카톨 농도 및 지방조직 내 평균 스카톨 농도는 CM3에서 EM0과 EM3 보다 감소가 확인되었다(p<0.05). 그러나 안드로스테논 농 도는 분석된 지방조직들 모두에서 처리구간 통계적인 차 이가 없다. 이러한 결과들은 이눌린 급여에 의해 비거세 돈의 지방 내 웅취물질 저감에 부분적인 효과를 나타냈 을 뿐만 아니라 거세돈에서도 웅취물질 감소에 긍정적인 영향을 미쳤음을 시사한다. 따라서, 본 연구결과는 물리적 인 거세가 전면 금지된다면 동물복지형 사양관리 기술개 발의 기초자료로 활용할 수 있을 것이다.

Recently, the crisis of demographic extinction is rising in Korea more than any other country, and it is difficult for industrial sites to maintain without 'foreign workers'. Industrial accidents and accident deaths of foreign workers account for 7.6% and 12.3% of the total, through an in-depth analysis of fatal accidents in the manufacturing industry, differences and similarities between fatal accidents of foreign workers and all fatal accidents were confirmed in terms of occurrence type, workplace size, length of service, employment type, etc. In this study, customized countermeasures were found.

PURPOSES : The purpose of this study was to improve the performance of concrete pavements by measuring the unit-water content with an Internet-of-Things (IoT)-based unit-water content measurement device at an increased precision compared with that of existing measuring equipment. METHODS : We calculated the properties of concrete that varied according to variations in the unit-water content. To confirm the change in the performance of concrete pavements, we compared and analyzed the fatigue cracking rate and international roughness index of concrete pavements at the 20-year point of public use according to the changes in properties using the Korea Pavement Research Program(KPRP). RESULTS : We confirmed that IoT-based measurement equipment can improve the performance of pavements without changing their mixing designs or specifications. We confirmed that the performance of the concrete pavements changed significantly, even with unit-water content variations within the range of quality standards. According to IoT-based unit-water content management, we confirmed that the performance of the concrete pavement (fatigue cracking rate and international roughness index) improved without changing the mixing design. CONCLUSIONS : We confirmed that by using IoT-based unit-water content management, pavement performance can be improved. It is necessary to consider whether the application of this concept to other concrete property management items, such as the chloride content, is possible. Considering the changes in concrete properties according to the unit-water content based on laboratory tests and considerations of various load conditions will be necessary for future research.

2019년부터 2022년까지 제주도 올리브(olive, Olea europaea)에서 발생하는 해충을 조사한 결과, 총 15종의 해충이 확인되었다. 이중 나방 류와 노린재류의 발생과 과실 피해가 매우 심했다. 나방류는 수수꽃다리명나방(Palpita nigropunctalis), 큰점애기잎말이나방(Aterpia circumfluxana), 차잎밀아나방(Homona magnanima), 차애모무늬잎말이나방(Adoxophyes honmai) 순으로 많이 발생하였다. 나방류 해충은 주로 잎을 가해했지만, 수수꽃다리명나방은 과실피해도 심하게 유발하였다. 노린재류로는 갈색날개노린재(Plautia stali), 썩덩나무노린재(Halyomorpha halys), 풀색노린 재(Chinavia hilaris)가 주로 발생하여 과실 피해를 유발하였다. 깍지벌레류인 갈색깍지벌레(Chrysomphalus bifasciculatus)와 뽕나무깍지벌레(Pseudaulacaspis pentagona)는 무방제 시 과실에도 발생하여 피해를 주었다. 진딧물과 해충은 국내 미기록종인 올리브면충(신칭, Prociphilus oleae)만이 발생하였고, 갈색나무매미충(Ricania shantungensis)도 올리브에 처음 발생이 확인되었다. 국내 미기록종인 올리브철모깍지벌레(신칭, Saissetia olea)은 발견되었으나 방제후 더이상 발생하지 않았다. 이외 천공성 해충이 올리브에 심각한 피해를 유발하였으나, 종은 확인되지 않았다.

This study deals with the maximum thermal load analysis and optimal capacity determination method of tank culture system for applying seawater source heat pump to save energy and realize zero energy. The location of the fish farm was divided into four sea areas, and the heat load in summer and winter was analyzed, respectively. In addition, two representative methods, the flow-through aquaculture system and the recirculation aquaculture system were reviewed as water treatment methods for fish farms. In addition, the concept of the exchange rate was introduced to obtain the maximum heat load of the fish farms. Finally, power consumption for heat pumps was analyzed in the view point of sea areas, tank capacity, and exchange rate based on the calculated maximum thermal load.

This study used hydroacoustic method to identify the vertical and horizontal distribution of Antarctic silverfish in the Ross Sea, Antarctica. In February and December 2018, Antarctic silverfish was detected up to 250 meters, and was mainly distributed in water depths of 20 to 30 meters. The horizontal distribution of Antarctic silverfish was mostly undetected in February, and December showed a relatively stronger distribution than that of February. Antarctic silverfish is characterized by their distribution near sea ice.

This study investigated the hazard factors based on imported food non-compliance and global food hazard information for the last 4 years to suggest imported food safety management. Food safety management on utensils or packaging containers is appropriately managed for the compounds derived from them. Food safety management on health-functional foods, processed foods, and agricultural products is concentrated on ingredient contents, food additives, and pesticide residuals. Additional hazards are illegal compounds, mycotoxins & pesticide residuals, hygieneindicator microorganisms and food-borne pathogens in health-functional foods, processed foods, and agricultural products, respectively. The continuous increase in hazards related to safety and hygiene in global food hazard information needs additional attention. To reduce the hazard factors, this study proposes that imported food be limited to products certified by HACCP or an equivalent food safety management system because registering foreign food facilities for processed and health-functional foods is mandatory. Additionally, the customs clearance inspections should focus on the hazard factors derived from the global food hazard information system. This study suggests a global food hazard information system that could derive frequently issued hazard factors at a given period and newly issued hazard factors in aspects, such as food items, subcategories, and exporting countries.

This study aims to select eggplant cultivars adaptive to the hot temperature period greenhouse climate by water consumption, and growth performance of plants and fruits of different European eggplant cultivars, including ‘Bartok (BA)’, ‘Bowie (BO)’, ‘Black Pearl (BP)’, ‘Ishbilia (I)’, ‘Mabel (M)’, ‘Vestale (VE)’ and ‘Velia (VL)’, in substrate hydroponic cultivation under hot and humid greenhouse conditions. On the 118 DAT, the leaf number and stem dry weight were highest in ‘VL’, followed by ‘M’, and there was no significant difference in leaf dry weight among cultivars. The marketable fruit number per plant was 16.4 for ‘M’, which was higher than other cultivars, and ‘VE’ and ‘VL’ were 8.5 and 8.8, respectively. The weight per fruit was low for ‘M’ at 136 g, and the highest in ‘VE’ and ‘VL’ at 332 and 281 g, respectively. There was no significant difference in fruit production per plant. In this study, ‘M’, which has high water use efficiency and a large number of fruits, and ‘VL’, which required less quantity to water consumption for producing 200 g of fruit and had a high product weight, will have excellent adaptability in the UAE greenhouse condition.

Because magnets fabricated using Nd-Fe-B exhibit excellent magnetic properties, this novel material is used in various high-tech industries. However, because of the brittleness and low formability of Nd-Fe-B magnets, the design freedom of shapes for improving the performance is limited based on conventional tooling and postprocessing. Laserpowder bed fusion (L-PBF), the most famous additive manufacturing (AM) technique, has recently emerged as a novel process for producing geometrically complex shapes of Nd-Fe-B parts owing to its high precision and good spatial resolution. However, because of the repeated thermal shock applied to the materials during L-PBF, it is difficult to fabricate a dense Nd-Fe-B magnet. In this study, a high-density (>96%) Nd-Fe-B magnet is successfully fabricated by minimizing the thermal residual stress caused by substrate heating during L-PBF.