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        검색결과 815

        1.
        2025.08 KCI 등재 구독 인증기관 무료, 개인회원 유료
        Enhancing the energy storage capabilities of supercapacitors (SCs) while preserving their electrochemical performance is crucial for their widespread application. Our research focuses on developing Sb-modified tin oxide (ATO) nanoparticles via a scalable hydrothermal process, offering substantial potential in this domain. The tetragonal nanoparticle structure provides abundant active sites and a highly porous pathway, facilitating rapid and efficient energy storage. Additionally, tin's varied oxidation states significantly enhance redox capacitance. Electrochemical measurements demonstrate ATO's promise as an advanced SC electrode, achieving a peak specific capacitance of 332 F/g at 3 mA/cm2, with robust redox capacitance confirmed through kinetic analysis. Moreover, the ATO electrode exhibits exceptional capacitance retention over 2000 cycles. This study establishes ATO as a leading candidate for future energy storage applications, underscoring its pivotal role in advancing energy storage technologies.
        4,600원
        2.
        2025.08 KCI 등재 구독 인증기관 무료, 개인회원 유료
        이 논문은 이언 매큐언의 􋺷나와 같은 기계들􋺸을 예이츠의 시적 관점을 통해 조명하면서, 인공지능의 맥락 속에서 영적 해체와 윤리적 붕괴에 대한 모더니즘 적 불안을 재구성하고 있음을 주장한다. 매큐언은 기계를 인간 존재에 대한 위협으로 묘사하기보다는, 흔들림 없는 도덕적 명확성을 지닌 탈인간적 존재로서의 합성 주인공 아담 을 구축하며, 인간 세계의 결함과 갈등을 부각시킨다. 본 연구는 인물의 성장, 윤리적 딜레마, 반사실 역사 에 대한 면밀한 텍스트 분석을 수행하며, 이를 예이츠의 영혼 분열과 순환적 시간에 대한 시적 명상과 연관을 짓는다. 아담의 역할을 모더니즘 적 틀 안에 위치시킴으로써, 매큐언이 기술적 이상주의와 도덕적 상대주의 모두를 비 판하고 있음을 드러낸다. 연구 결과는 아담의 삭제가 기계의 실패가 아니라, 인간이 자신의 모순을 직시하지 못하는 데에서 비롯된 것임을 보여준다. 궁극적으로 이 논문 은 가 인공지능에 대한 경고가 아니라, 양심을 지워버리는 세계를 향한 모더니즘적 애 도라고 주장한다.
        5,200원
        6.
        2025.07 KCI 등재 SCOPUS 구독 인증기관 무료, 개인회원 유료
        The use of aluminum-based hybrid metal matrix composite (HMMC) materials, especially in engine components like pistons, is intended to improve wear resistance and overall performance. Crucial tribological indicators, such as wear and friction coefficients, underscore the significance of these materials. However, present aluminum alloys have limited wear because of clustered reinforced particles and relatively high coefficients of thermal expansion (CTE), resulting in inadequate anti-seizure properties during dry sliding conditions. This research introduces a novel “Hybrid Metal Matrix Composite of Al7068 Reinforced with Fly Ash-SiC-Al2O3”. Al7068 is employed for its superior strength-to-weight ratio and specific modulus, which is ideal for components exposed to cyclic loads and varying temperatures. The integration of fly Ash (FA), silicon carbide (SiC), and alumina (Al2O3) as reinforcements enhances wear resistance, diminishes particle clustering, improves stiffness, mitigates CTE discrepancies, and fortifies the composite against strain and corrosion, thereby enhancing its overall performance. The Stir-casting method was used with optimized reinforcement percentages (10 % total), and comprehensive evaluations through wear tests and mechanical property analyses determined the composite's optimal composition. The proposed HMMC variant with the most suitable reinforcement percentage exhibited enhanced engine piston functionality, reduced wear, low deformation of 0.20 mm, and a comparatively higher ultimate tensile strength of 190 megapascals (Mpa).
        5,400원
        7.
        2025.04 KCI 등재 구독 인증기관 무료, 개인회원 유료
        기타 하리하란은 인도의 가장 주목받는 여성 작가 중 한 명이다. 그녀 는 자신의 상처와 굴욕의 경험을 기록하기 위해 자신만의 독특한 문체를 채택했다. 또 한 여성 문제에 대한 깊은 관심으로 잘 알려진 사회운동가이기도 하며, 1995년 인도 대법원에서 힌두 소수자 및 후견법에 이의를 제기하여 인도 현대사에 있어 주목할 만 한 판결을 이끌어냈다. 그녀는 인도 사회에서 여성들이 겪는 문제와 도전에 대해 탐구 하였다. 여성의 지위, 생활방식, 삶의 상태, 정체성, 그리고 사회적 반응에 대해 논의 하였으며, 그녀의 소설을 통해 사회의 모든 영역에서 여성 인물들을 묘사하고, 남성 중심 사회에서 여성이 어떻게 대우받고 있는지를 드러냈다. 그녀의 소설은 여성들이 엄격한 사회 체제와 공동체적 구조 속에서 어떻게 이끌리고 통제받는지를 보여주는 실제 여성들의 상황을 반영한다. 그녀의 작품들은 여러 언어로 번역되었다. 이러한 맥 락에서, 그녀의 첫 번째 소설 􋺷밤의 천 가지 얼굴􋺸은 남성 중심의 인도 사회에서 자 기 정체성을 찾기 위해 고군분투하는 여성들의 문제와 도전을 다루고 있다. 이 소설은 세 명의 서로 다른 여성의 이야기를 통해, 전통과 문화 사이에 끼어 있는 그들의 삶 의 기대와 현실을 조명한다. 각 인물은 자신만의 정체성과 자리를 찾기 위한 독특한 도전에 직면하고 있다. 시적인 문체로 구별되는 이 소설은 인도 사회 규범이라는 경로 를 따라 세 여성의 불안정한 여정을 그려내고 있다.
        4,800원
        10.
        2024.12 KCI 등재 구독 인증기관 무료, 개인회원 유료
        According to previous studies, the El Niño Southern Oscillation (ENSO) does not appear to regulate TC activity over Korea. By dividing the TC season into two sub-seasons, i.e. summer and autumn, we found the opposite response of TC activity over Korea to ENSO phases between the sub-seasons. In summer, about 1.2 more TCs affect Korea during El Niño than during La Niña, while about 1.2 fewer TCs do so in autumn. The opposite responses to ENSO could reduce the statistical significance of the relationship between ENSO and TC activity over Korea when the entire TC season (July to October) is considered. In summer, the southerly anomaly over the southern sea of the Korean peninsula due to the eastward retreating subtropical high allows a greater number of TCs to approach Korea during El Niño compared to La Niña. On the other hand, in autumn, the northwesterly anomaly due to the westward extension of the subtropical high leads to a smaller number of TC approaches.
        4,000원
        11.
        2024.11 KCI 등재 구독 인증기관 무료, 개인회원 유료
        In recent years, the search on fabrication of highly efficient, stable, and cost-effective alternative to Pt for the hydrogen evolution reaction (HER) has led to the development of new catalysts. In this study, we investigated the electrocatalytic HER activity of the Toray carbon substrate by creating defect sites in its graphitic layer through ultrasonication and anodization process. A series of Toray carbon substrates with active sites are prepared by modifying its surface through ultrasonication, anodization, and ultrasonication followed by anodization procedures at different time periods. The anodization process significantly enhances the surface wettability, consequently resulting in a substantial increase in proton flux at the reaction sites. As an implication, the overpotential for HER is notably reduced for the Toray carbon (TC-3U-10A), subjected to 3 min of ultrasonification followed by 10 min of anodization, which exhibits a significantly lower Tafel slope value of 60 mV/dec. Furthermore, the reactivity of the anodized surface for HER is significantly elevated, especially at higher concentrations of sulfuric acid, owing to the enhanced wettability of the substrate. The lowest Tafel slope value recorded in this study stands at 60 mV/dec underscoring the substantial improvements achieved in catalytic efficiency of the defect-rich carbon materials. These findings hold promise for the advancement of electrocatalytic applications of carbon materials and may have significant implications for various technological and industrial processes.
        4,000원
        12.
        2024.11 KCI 등재 구독 인증기관 무료, 개인회원 유료
        Complex structure constituting of several layers of heteroatom-doped N-CDs are used as a main sensing film along with aluminum electrodes in conductometric gas sensing system for sensitive and selective monitoring of CO2 and CO gases diluted with normal air, which are extensively prevalent in the atmosphere primarily due to the industrial revolution, locomotives, and numerous natural phenomena’s and the limit of detection (LOD) turned out to be 400 ppm and 30 ppm, respectively, with 20% relative humidity at 30 °C and pressure 1 (atm) which are good for healthy air quality checks. The sensor performance was satisfactory and bidirectional at ambient room temperature (30 °C) and pressure (1 atm) conditions but the relative humidity (50%) at 30 °C had a detrimental impact on the sensing responses, therefore intermittent heating at 80 °C for several minutes between the sensing responses was provided to the sensing chip or one should use gas filter membranes to block humidity, thereby maintaining its constant performance with great ease and accuracy. The cyclic voltammetry revealed well-defined oxidation and reduction peaks, with excellent stability and reversibility. In a nutshell, heteroatom-doped N-CDs’ nanocomposite material can revolutionize in a better environmental pollution monitoring by sensing gases in an extensively lesser response and recovery times.
        4,500원
        15.
        2024.09 KCI 등재 구독 인증기관 무료, 개인회원 유료
        Bio-efficacies of two different types of fungicides, Diniconazole and Paclobutrazol with their effects as plant g rowth regulators f or Kimchi Cab bage were e valuated o n February 4 to A pril 13, 2024 in Los Baños, Laguna, Philippines. The experiment was done during the off-season planting of Kimchi Cabbage in the country. Yield and other horticultural characteristics were observed for seven different groups: group 1, untreated control; group 2, recommended rate of granular fertilizer (RR-G); group 3, recommended rate of granular fertilizer plus recommended rate of Diniconazole; group 4, recommended r ate of D iniconazole (alone); g roup 5 , recommended rate o f Paclob utrazol (RR-PBZ), group 6, RR-G plus RR-PBZ; and group 7, RR-G plus ½ RR-PBZ. Results showed that combination of recommended rate of granular fertilizer plus the full recommendation of Paclobutrazol (group 6) resulted in a significantly higher yield of 64.9 tons/ha than other groups with yields ranging from 23.3 to 55.3 tons/ha. Such significantly higher yield in group 6 was also attributed to the number of leaves produced by plants at the time of harvest. Regarding effects of two chemical treatments, the combination of Diniconazole a nd P aclob utrazol a s recommended granular f ertilizers h elped in t he heading of K imchi Cabbage during hot conditions with an average temperature of 32-35°C from March to April at the heading stage plus a f actor of b eing planted a t a lowland area i n the country. T he a dvantage o f Paclobutrazol aside from yield is its availability in the country as compared to Diniconazole (Binnari).
        4,300원
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