새우는 지질과 칼로리가 낮은 고단백질 공급원으로, 분말 또는 소스 형태로 가공되어 다양한 식품에 첨가된다. 그러 나 새우 알레르기가 있는 환자가 섭취할 경우 심각한 건강 상의 위험을 초래할 수 있으며, 특히 가공식품에 포함된 알 레르기 유발물질은 인지하고 섭취를 피하기 어렵다. 이에 따 라 가공식품 중 새우를 신속하고 정확하게 검출할 수 있는 분석법 개발이 요구된다. 본 연구에서는 새우의 열안정성 수 용성 단백질(TSSP)의 존재를 확인하고, 이를 이용하여 생산 한 다클론성 항체(pAb)를 기반으로 간접 효소결합면역흡착 분석법(indirect ELISA)을 개발하였다. 생산된 pAb는 Penaeus japonicus, Metapenaeus joyneri, Penaeus chinensis, Pandalus borealis, Penaeus monodon 등 5종의 새우에만 특이적으로 반응하였으며, 다른 식품 성분과 교차 반응을 보이지 않았 다. 개발된 pAb 기반 indirect ELISA의 검출한계(LOD)는 0.001%였다. 또한 삶음(100oC, 60분), 멸균(121oC, 60분), 튀 김(170oC, 8분) 처리된 새우 시료에서도 검출이 가능하여, 다양한 조리 조건 적용 후에도 검출이 가능함을 확인하였다. 이러한 결과는 새우 TSSP가 열처리 식품에서 새우 혼입 여 부를 식별할 수 있는 항원 및 바이오마커로 활용될 수 있 음을 시사한다. 더 나아가, 본 연구에서 개발된 pAb는 가공 식품에 혼입된 새우 검출을 위한 면역분석 및 바이오센서 개발에 유용한 생체수용체로 활용될 수 있다.

온도와 곤충 발육과의 관계는 생물학에서 오래된 핵심 주제이며, 하한임계온도와 온량상수를 기반으로 한 선형 적산온도 모형은 해충 발생 예측에 널리 활용되어 왔다. 그러나 이러한 모형은 중위 온도범위에서만 유효하며, 저온과 고온의 극단 온도에서는 발육률을 과소 또는 과대평가하 는 한계를 가진다. 이를 보완하기 위해 사인곡선 기반 적산온도 계산법과 수평제거법이 제안되었지만, 일중 최고온도가 최적온도나 상한임계온도 를 초과할 경우 유효온도가 여전히 과대평가된다. 본 리뷰는 하한, 최적, 상한의 세 임계온도를 도입하고, 최적온도에서 수평제거, 상한임계온도에 서 수직제거를 동시에 적용한 새로운 방법인 3임계온도 기반 사인곡선 이중제거법(시간별온도 이중제거법)을 제안하였다. 시간별온도 이중제거법 은 사인함수를 이용한 시간별 온도 추정을 통해 보다 정확한 유효온도 계산이 가능하며, 특히 고온조건에서 과대평가를 효과적으로 줄일 수 있었다. 최적온도와 상한임계온도 사이에서는 일부 오차가 남을 수 있으나, 기존 방식에 비해 실질적인 개선 효과가 있었다. 또한, 상한임계온도의 정의에 대한 혼란을 정리하고, 향후에는 비선형 발육모형을 통한 정밀 예측의 필요성도 제기하였다.

Phase change materials (PCM) with enhanced thermal conductivity and electromagnetic interference (EMI) shielding properties are vital for applications in electronic devices, energy storage, and aerospace. However, achieving a synergistic improvement in both thermal and EMI shielding performance remains a significant challenge. This study presents the development of phase change composites reinforced with 3D Ag foam and short carbon fibers (SCF) to address this challenge. Ag@SCF/ PCM composites were fabricated using a vacuum-assisted impregnation and curing process. Polyethylene glycol and epoxy resin formed the PCM matrix, while SCF and Ag foam created a dual-scale interpenetrating network to provide channels for phonon and electron transmission. The dual-scale network significantly improves thermal conductivity (2.24 W/m·K) and EMI shielding (69.7 dB), while maintaining latent heat storage (melting: 71.5 J/g, freezing: 68.7 J/g). These multifunctional properties make Ag@SCF/PCM composites promising candidates for applications requiring simultaneous thermal management and electromagnetic performance optimization.

The thermal management of high-density electronics within military shelters is a critical challenge for ensuring operational reliability, particularly under harsh field conditions involving significant solar radiation. This study presents a numerical investigation using three-dimensional Computational Fluid Dynamics (CFD) to optimize an air-cooling system for an electronics rack housed in a military shelter. Four distinct cooling configurations were analyzed and compared: (1) a baseline model relying on natural convection, (2) a fan-assisted forced convection model, (3) a direct cold air supply model using an insulated duct, and (4) a hybrid model integrating both fans and the duct. Boundary conditions were established based on the high temperature and solar radiation criteria of the MIL-STD-810G standard. To quantitatively evaluate the cooling efficiency of each system, a normalized performance index derived from a weighted sum of the average temperature and temperature standard deviation was employed. The results demonstrate that the baseline configuration leads to critical overheating, with component temperatures reaching up to 124℃. In contrast, the hybrid fan-duct system exhibited the most superior performance, effectively reducing the maximum temperature to 59℃. This is attributed to a powerful synergistic effect, where the qualitative supply of low-temperature air via the duct is combined with the quantitative distribution of flow rate throughout the system by the fans. This study elucidates an effective thermal management strategy for electronics in military shelters exposed to severe environments, identifying the integrated fan-duct system as the most robust and optimal air-cooling solution.

This study simulated the thermal characteristics of a liquefied hydrogen (LH) tank with varying multi-layer insulation (MLI) thickness and surrounding conditions. A transient heat conduction simulation was conducted using ANSYS Fluent software to predict the temperature distribution of the LH tank. The LH tank is composed of carbon fiber reinforced plastic (CFRP), MLI, and an Air layer for thermal insulation. A large MLI thickness delayed temperature changes inside the MLI due to its low thermal diffusivity. And then, the temperature rapidly increased near the outer wall, resulting in thermal non-uniformity. Therefore, when designing a LH tank with MLI materials, it would be necessary to optimize the design (i.e., MLI thickness) by considering structural stability issues caused by thermal non-uniformity. In addition, as the surrounding temperature increased and the convective heat transfer coefficient became higher, the enhanced heat transfer led to a higher temperature gradient within the LH tank, bringing the outer wall temperature of the LH tank closer to the environmental conditions. The results of this study will significantly contribute to establishing a comprehensive thermal database for predicting the thermal-structural behaviors, considering the thermal stress induced by the thermal distribution of LH tanks, which depends on the installation conditions and environment.

This study assessed the processing suitability and functional potential of sweet potato paste by comparing quality characteristics across different cultivars and heat treatment methods (steaming and baking). Generally, moisture content was higher after steaming, with the ‘Bodami’ and ‘Pungwonmi’ cultivars retaining more moisture, while ‘Jinyulmi’ and ‘Danjami’ had lower moisture levels. Purple-fleshed cultivars displayed negative a* and b* values, indicating bluish hues, whereas yellow-fleshed cultivars maintained stable b* values after heating. Both °Brix and free sugar levels increased after treatment, with baking significantly elevating maltose levels and enhancing sweetness. Apparent viscosity was higher in ‘Danjami’, ‘Jinyulmi’, and ‘Bodami’, while ‘Hogammi’, ‘Hopungmi’, and ‘Sodammi’ exhibited lower viscosity. Additionally, ‘Bodami’ and ‘Danjami’ demonstrated the highest levels of polyphenols, flavonoids, and antioxidant activities, confirming their potential as valuable functional ingredients. These findings underscore the importance of selecting appropriate cultivars and heat treatments to optimize the physicochemical and functional qualities of sweet potato paste.

Magnetic nanoparticles in nanofluid have a unique ability in that they can be influenced by an external magnetic field, making them a promising heat-exchanging fluid to meet the demands of highly efficient thermal systems. The parametric impact of the magnetic field (static and time-varying) on the heat exchanging rate of Fe3O4 nanoparticles and water-based ferrofluid was investigated in this study. The experimental setup for generating a variable frequency magnetic field and analyzing the thermal behavior of ferrofluid is presented. Temperature data was obtained as heat is transferred from heated water to the ferrofluid used as a coolant. An enhancement of the heat transfer of the magnetic nanofluid was observed when varying the magnetic field frequency, through experimental analysis. The concentration of Fe3O4 nanoparticles in the ferrofluid was varied (0.5 wt%, 1 wt%)to study the impact of nanoparticle loading on heat transfer. An alternative approach for controlling the heat exchange rate in thermal systems is proposed, utilizing the magnetic tunability of the ferrofluid.

Since the small screen must be watched at the production and manufacturing site, when using the monitor without a separate paper for work and production instructions, it is necessary to look at the work instruction screen installed in a separate space to prevent work efficiency from deteriorating. It plays a role through a monitoring system using DPS or Barcode and RF-ID recognition as a safety device for installing heterogeneous parts in manufacturing and missing parts, but due to the high cost of introducing the system and difficulty in maintaining management, Visual POP is put into the production line. This study was produced by paying attention to the following five points in order to reduce the weight of these industrial Visual POPs and have global specifications and uses. These include instrument design and design, processing production, UI and control, application, thermal stress analysis and thermal analysis. In this study, it is considered to thermal stress analysis and thermal analysis of Visual POP for Models 1 and 2.

This study numerically investigated thermal-structural characteristics of a liquefied hydrogen (LH) storage cylinder with varying inner pressures and surrounding temperatures. A thermal-structure coupled analysis approach was used to predict the thermal-structural characteristics of the LH storage cylinder. For the simulation, the shape of the LH storage cylinder was simplified using SUS 316L and Carbon Fiber Reinforced Plastic (CFRP) materials. As a result, the inner pressure was a crucial factor determining the structural property (i.e., stress and deformation) of the LH storage cylinder. The high pressure led to increased stress and deformation. Additionally, the surrounding temperature affected the stress and deformation of the LH storage cylinder. For example, at a high surrounding temperature, the temperature gradient along the cylinder increased, thereby causing the occurrence of thermal stress. However, this temperature effect on the stress was negligible compared to the effect of inner pressure. The findings of this study will provide meaningful data for improving the structural safety of LH storage systems.

As the integration of devices in electronics manufacturing increases, there is a growing demand for thermal interface materials (TIMs) with high through-plane thermal conductivity. Vertically aligned carbon fiber (CF) thermally conductive composites have received considerable attention from researchers. However, the presence of significant interfacial thermal resistance at the interface between CFs and polymer presented a significant challenge to achieving the desired thermal conductivity, even in highly vertically aligned structures. Here, in addition to developing a polymer-based thermally conductive composite based on highly oriented CFs, we employed the Diels–Alder reaction to enhance the interfacial bonding between the CFs and the polymer matrix. Notably, we proposed the thermal conductivity enhancing mechanism of the highly oriented CFs filled silicone rubber (SR) composite originated from the strengthened interfacial bonding. The results indicated that the Diels–Alder reaction facilitated an increase in the thermal conductivity of the composite from 17.69 Wm− 1 K− 1 to 21.50 Wm− 1 K− 1 with a CF loading of 71.4 wt%. Additionally, a novel nano-indentation test was employed to analyse the interfacial strengthening of composites. Our research have significant implications for the advancement of thermal management in the field of electronics and energy, particularly with regard to the development of high-performance thermally conductive composites.

TiO2/Ag/TiO2 (TAT) tri-layer films were deposited using radio frequency (RF) magnetron sputtering and direct current (DC) magnetron sputtering on a glass substrate, and then rapid thermal annealed at 150 and 300 °C for 10 minutes. The influence of annealing temperature on the optical and electrical properties of the films was investigated. As annealing temperature was rapidly increased from room temperature to 300 °C, the grain size of the TiO2 (004), (204) and Ag (200) increased from 36.8, 14.3, 22.1 nm to 43.2, 16.6, 23.4 nm, respectively and the electrical resistivity decreased from 4.64 × 10-5 Ω cm to 2.79 × 10-5 Ω cm. Also, the average visible transmittance increased from 82.7 % to 84.9 %. In addition, the electromagnetic interference shielding effectiveness of TAT films was also increased to 31.7 db after annealing at 300 °C. These results demonstrate that post-deposition rapid thermal annealing is an effective method for enhancing the electrical and optical properties of TAT films.

본 연구는 서울시를 대상으로 여름철 지표온도(LST)에 영향을 미치는 공간적 요인을 분석하고, 지역별 영향력의 이질성을 파악하고자 하였다. 이를 위해 Landsat 8 위성영상을 활용하여 2024년 여름철 평균 지표온도를 산출하고, 자연환경, 도시구조, 인구활동, 토지이용 변수들을 250m 격자 단위로 구축하였다. 전역적 회귀분석(OLS)과 지리가중회귀분석(GWR)을 수행한 결과, GWR 모형이 더 높은 설명력(R2 = 0.878)과 낮은 AIC 값을 보여 공간적 적합도가 우수함을 확인하였다. 또한 Local R2 분포를 통해 모형의 설명력이 지역별로 상이함을 확인하였고, 변수별 회귀계수의 공간 분포를 통해 열환경 형성 요인의 비선형성과 공간 비정상성을 실증적으로 확인하였다. 본 연구는 서울시의 열환경 대응을 위한 지역 맞춤형 공간정책 수립에 기초자료를 제공하며, 도시열섬의 불균형 해소 및 열취약지역 관리 전략의 수립에 기여하고자 하였다.