This study successfully prepared high-porosity aluminosilicate fibrous porous ceramics through vacuum suction filtration using aluminosilicate fiber as the primary raw material and glass powder as binder, with the appropriate incorporation of glass fiber. The effects of the composition of raw materials and sintering process on the structure and properties of the material were studied. The results show that when the content of glass powder reached 20 wt% and the samples were sintered at the temperature of 1,000 °C, strong bonds were formed between the binder phase and fibers, resulting in a compressive strength of 0.63 MPa. When the sintering temperatures were increased from 1,000 °C to 1,200, the open porosity of the samples decreased from 89.08 % to 82.38 %, while the linear shrinkage increased from 1.13 % to 10.17 %. Meanwhile, during the sintering process, a large amount of cristobalite and mullite were precipitated from the aluminosilicate fibers, which reduced the performance of the aluminosilicate fibers and hindered the comprehensive improvement in sample performance. Based on these conditions, after adding 30 wt% glass fiber and being sintered at 1,000 °C, the sample exhibited higher compressive strength (1.34 MPa), higher open porosity (89.13 %), and lower linear shrinkage (5.26 %). The aluminosilicate fibrous porous ceramic samples exhibited excellent permeability performance due to their high porosity and interconnected three-dimensional pore structures. When the samples were filtered at a flow rate of 150 mL/min, the measured pressure drop and permeability were 0.56 KPa and 0.77 × 10-6 m2 respectively.

In the present study, an innovative electrochemical sensing platform was established for sensitive detection of NO2 —. This sensor was developed using CoFe alloy encapsulated in nitrogen-doped carbon nanocubes (named as CoFe@NC-NCS), synthesized through the calcination of polydopamine-coated CoFe Prussian-blue analogues (CoFe-PBA@PDA). The morphological and electrochemical characterization reveals that the CoFe@NC-NCS possesses high electrocatalytic activity for electrochemical quantitation of NO2 —, ascribed to the huge surface area and plentiful active positions, benefiting from the porous, hollow, and core–shell structure of CoFe@NC-NCS. Under the optimal conditions, CoFe@NC-NCS/GCE possessed remarkable sensing performance for NO2 — with wide liner ranges and a detection limit of 0.015 μM. NO2 — recovery experiments in real samples exhibited recoveries in the range of 98.8–103.5%. Hence, the CoFe@NC-NCS shows great promise for the construction of electrochemical sensor with more potential application.

High-quality diamond films have attracted extensive attentions due to their excellent optical and electrical properties. However, several issues, such as random orientation, stress accumulation, and slow growth rate, severely limit its applications. In this paper, high-quality polycrystalline diamond films with highly ordered (100) orientation were prepared by microwave plasma chemical vapor deposition. The effects of growth parameters on the microstructure, quality and residual stress of diamond films were investigated. Experimental results indicate that relatively high temperature at low methane concentration will promote the formation of (100) oriented grains with a low compressive stress. Optimized growth parameters, a methane concentration of 2% along with a pressure of 250 Torr and temperature at 1050 ℃, were used to acquire high growth rate of 7.9 μm/h and narrow full width at half maximum of Raman peak of 5.5 cm− 1 revealing a high crystal quality. It demonstrates a promising method for rapid growth of high-quality polycrystalline diamond films with (100) orientation, which is vital for improving the diamond related applications at low cost.

Modification of the surface of raw activated carbon using chemical solvents can significantly improve the adsorption performance of activated carbon. Triethylenetetramine is one of the most important chemical solvents used to modify raw activated carbon for formaldehyde removal indoor. We conducted the liquid impregnation experiments at different initial concentrations, temperatures, adsorbent dosage and time ranges to fully investigate the adsorption of triethylenetetramine on the surface of raw activated carbon for modification. We found that the Langmuir isotherm model and pseudo-first-order kinetic model fit quite well with the experimental data and the R2 are 0.9883 and 0.9954, respectively. The theoretical maximum adsorption capacity is 166.67 mg/g. The change in Gibbs free energy (ΔG0), enthalpy change (ΔH0) and entropy change (ΔS0) were also calculated to study the direction and driving force of the liquid adsorption process. In order to understand the adsorption process at the molecular level, a new activated carbon model based on the actual physical and chemical properties of activated carbon was carefully established in the Materials Studio to simulate the liquid-phase adsorption. The pore structure, elemental composition, functional group content, density, pore volume, and porosity of the activated carbon model converge close to the actual activated carbon and the adsorption isotherms obtained from the simulation agree well with the experimental results. The results show that the adsorption of triethylenetetramine on activated carbon is a spontaneous, endothermic and monolayer physical adsorption process.

According to traditional philological materials such as Shuowen Jiezi and oracle bone inscriptions, the original meaning of the character 得 is “get”. This article takes the Book of Mencius as closed materials, exhaustively categorizing all entries of 得 in Mencius, totaling 114 examples. Then we analyze semantic content and grammatical features references to the four commentaries from Zhao Qi , Sun Shi, Zhu Xi, Jiao Xun. We find that all examples of 得 are used as verbs, but there are 12 examples where it is used as a delexical verb, exemplifies the gradual trend of semantic attenuation of 得. After conducting linguistic analysis of the character 得, we explore its manifestation of the philosophical ideas in Mencius, including aspects of personal cultivation, interpersonal relationships, and governance wisdom. Through the interaction of language and cultural analysis, we further deepen our study of the language theory and ancient classics culture.

Natural enemy insects, including predators and parasitoids, are beneficial organisms that feed upon other agricultural pests. Using natural enemy insects to suppress or prevent outbreak of pests is a key component of integrated pest management strategy. It is safe, effective, and environmentally friendly and can be applied easily to the greenhouses, filed crops and orchards. Rearing and application of natural enemy insects in biocontrol in China have a long history. As early as 1700 years ago, the predator Oecophylla smaragdina has been used for controlling many kinds of citrus pests. Up to now, more than 30 species of natural enemies that can be artificially mass produced and widely used for biological control of many kinds of pests, including caterpillars, aphids, whiteflies, thrips, leaf mites and scales in China. The annual average application area of natural enemies is over 11.34 million hectares. However, with the increasing demand of using natural enemies in biological control programs, the development of natural enemy insect industrialization still face many challenges. It is urgent to explore more effective candidate natural enemies, improve the production efficiency, increase the shelf life of products and enhance the colonization of natural enemy insects after release, and thus facilitate the commercially production and application of natural enemies. This is of great significance for comprehensively promoting the use of green prevention and control techniques for crop diseases and pests, reducing the use of chemical pesticides, ensuing the quality and safety of food and agricultural products, and ultimately promoting sustainable agricultural development.

This paper tests firms’ strategic response to negative consumer sentiment. We use sentiment analysis on social media posts to detect and proxy for negative consumer sentiments toward the firms and operationalize the number of ESG positive news about the firms as the strategic response to the sentiment. We document a surprising phenomenon that negative sentiment toward a firm is positively associated with future ESG news announcements by the firm. The effect is stronger for B2B firms than for B2C ones. We argue this is the firm’s strategic reaction rather than being a true change in the firm’s ESG policy, because (1) The ESG effect only lasts for a short period, and (2) the negative sentiment toward the firm decreases after the ESG news. Using former US president Trump’s tweets as external shocks, we show the causal relationship in a DID framework.

Some digital platforms introduced a novel positive-framing design in the multi-dimensional rating system, which framed the attribute with positive words for consumers to rate. The results from a cross-platform quasi-natural experiment show that the positive-framing design can increase the rating scores compared with the traditional non-positive framing design.

In recent years, the trend of customer demand and personalization has become more and more obvious. The previous innovation model can no longer meet the diversified needs of consumers. Therefore, firms vigorously develop open innovation to promote internal and external innovation (von Hippel, 1988). With the rapid development of AI technology, open innovation communities have more interactions with the users. Organizations continue to rely on their open innovation community to collect innovative ideas from non-professional customers and then integrate them into their new product development process to produce innovative products that are more in line with customer preferences (Bayus, 2013). At present, the research on user design focuses on how to increase user design implementation and the idea popularity (Yang et al., 2022; Zhang et al., 2022). Few studies discussed how to motivate consumers to participate in innovative content output from the source. In addition, academic research on user design is mostly limited to management comments, lacking in-depth empirical research (Franke et al. 2008). Previous studies have proved that the number of leading users in the open innovation community is far less than that of non-leading users (Hofstetter et al., 2018), so it is very necessary to improve the willingness of users to participate in community creative activities. With the vigorous development of the new technology, it is an urgent problem to be solved to encourage users to participate in innovation activities and improve the innovation performance of firms (Chesbrough, 2012). Today, firms pay more and more attention on the implementation of AI technology. With AI and user design as the research background, “AI recommendation” and “willingness to design” as the key variables, and the “S-O-R model” and “Self-determination Theory” as the basis, this paper deeply explores whether AI recommendation can be used as a factor affecting user’s participation in design activities from the perspective of users, focusing on the intermediary role of user’s inspiration, competency and self-expression. It also puts forward that product involvement and aesthetic experience openness (Donghwy and Youn, 2018) are the boundary conditions that affect user’s willingness to participate in design. The results show that user’s willingness to participate in design is higher when providing AI recommedation, and the sense of inspiration, competence and self-expression play a mediating role in it. Furthermore, the results show that when product involvement is high, users are more willing to participate in design. Similarly, users with a high degree of aesthetic experience openness are more willing to participate in design activities. This study enriches the theory of enterprise community management, promote the internal information flow of the open innovation community, and provide theoretical guidance and reference for firms to optimize the new product design process.

중국의 고령화 사회가 도래함에 따라 가족의 노후는 사회의 주 요 노후 방법 중 하나가 되었으며 중국인들은 음식, 특히 노인을 좋아하고 스스로 요리하는 것을 선호하며 음식 생산 장소, 주방 은 노인의 생활 공간의 일부로써 주택에서 자주 사용되고 가사 노동이 가장 집중되는 곳이며 노인에게도 사고가 발생하기 쉬운 곳입니다.무장애 장비와 시설이 완비된 무장애 주방은 노인의 능 력 부족을 극복하고 보상하며 노인에게 안전하고 편안하며 자립 적인 주방 생활 환경을 제공하고 노인의 생활과 정신의 요구를 충족시켜 삶의 질을 향상시킬 수 있다.본문은 자기관리 능력이 있는 노인을 연구대상으로 하여 노인의 생리적 특징과 심리적 특 징을 두 가지 차원에서 분석하고, 무장애 주방설계의 이념과 원 칙을 결합하여 주방공간의 평면배치와 조작과정, 주방입면의 설 계원칙을 설명하고, 노인의 주방작업의 행동패턴과 생리적 특징 을 통해 노인의 주방작업시 실제 수요를 분석하여 노인의 무장애 주방공간의 설계원칙과 주방설계를 제안한다.노인의 주방 업무에 대한 장벽을 줄이고 노동 강도를 줄이며 작업 효율성을 높이고 노인의 신체적, 정신적 편안함을 높다.동시에 관련 디자인 분야에 대한 참고 자료를 제공 한다.

지능형 컴퓨팅의 등장으로 빅데이터를 활용한 패션 브랜드 의미 마이닝과 가치 홍보에 초점을 맞춘 새로운 연구 트렌드가 등장하였다. 본 연구의 목적은 인기 여성복 브랜드 5개를 대상으로 다양한 종류의 의류에 대한 소비자 감성 트렌드를 조사하는 것이다. 유니클로, 에이치스타일, 베로모다, 피스버드, 온리. 이를 위해 총 93,550건의 소비자 평가를 수집하고, 키스멧 감성 분석 엔진을 활용하여 의류 유형별 감성 극성도를 분석하였 다. 그 결과, 브랜드에 따라 감정 극성이 크게 다르다는 것을 알 수 있었으며, HSTYLE 후드티, ONLY 니트웨 어, 피스버드 순면, 유니클로 니트가 각각 소비자들에게 가장 강한 긍정적 감정을 불러일으켰다. 또한 이번 연 구에서는 각 브랜드에서 가장 인기 있는 의류 유형과 착용 효과를 밝혀 패션 기업이 효과적인 마케팅 전략을 수립하고 제품 제공을 강화하는 데 중요한 인사이트를 제공했다. 이러한 연구 결과를 바탕으로 게임 업계에서 는 감성 분석을 적용하여 다양한 게임 브랜드, 장르, 게임 플레이에 대한 플레이어의 감정 반응을 이해하고 게임 프로모션 전략과 제품 디자인 개발에 도움을 줄 수 있다. 전반적으로 이 연구 결과는 디자인 분야에서 빅데이터의 잠재력을 입증하고 업계에서 경쟁 우위를 확보하기 위해 빅데이터를 활용하는 것이 중요하다는 점을 강조할 수 있다.

대학생들은 세계 경제 성장둔화의 파급효과로 취업에 어려움 을 겪고 있다. 이러한 대학생들은 입학 후 학업 문제, 대인관계 능력문제, 미래 진로문제 등으로 스트레스를 받고 있다. 따라서 대학생들은 스트레스 문제로 심리적 안녕감 수준이 떨어져 상 담의 도움을 구하는 대학생이 늘고 있다. 본 연구에서는 대인 관계 능력과 사회적 지지가 심리적 안녕감에 미치는 영향을 조 사하여 대학교육정책과 심리상담 실천을 위한 대학생의 심리적 안녕감 수준을 향상시키기 위한 제언 하고자 한다. 이 연구의 연구대상은 중국 랴오닝성 선양시(遼寧省瀋陽市) 소재한 대학 생 411명을 대상으로 실시하였다. 분석방법은 신뢰도 분석, 탐 색적 요인분석, 빈도분석, 기술통계 분석, 상관관계 분석, 다중 회귀 분석을 하였다. 연구결과는 다음과 같다. 첫째, 대인관계 능력이 심리적 안녕 감에 정(+)의 영향을 미치는 것으로 나타났다. 둘째, 대인관계 능력이 사회적 지지에 정(+)의 영향을 미치는 것으로 확인되었 다. 셋째, 사회적 지지가 심리적 안녕감에 정(+)의 영향을 미치 는 것으로 나타났다. 이와 같은 연구결과는 대학생들의 대인관 계 능력 및 사회적 지지는 심리적 안녕감에 중요하다는 것을 알 수 있다. 따라서 대학생들의 대인관계 능력 및 사회적 지지 를 증진 시키는 것이 필요함을 시사한다.

One-step hydrothermal reduction method was used to prepare three-dimensional carbon fiber brush-based graphene–platinum (CFB/Pt–G) composites to improve the electrocatalytic oxygen reduction activity of cathode materials for seawater oxygen-dissolved battery. Characterization results show that the reduced graphene oxide of as-prepared graphene–platinum composite displays the few-layer folded structure. In addition, Pt nanoparticles with the polycrystalline structure dispplay a preferential growth along the crystal plane of (111) and are mainly distributed around the defect cavities of folded graphene. Electrochemical results show that the diffusion-limited current density of CFB/Pt–G composite tested with 1600 rpm/min in 3.5% NaCl solution reaches 5 mA/cm2, while that of CFB/G is only 2.64 mA/cm2. Battery discharge results show that the maximum volume power density of CFB/Pt–G–Mg battery with a stable open voltage of 1.73 V is 81 times as much as the commercial seawater battery SWB1200.

난황형성과정(Vitellogenesis)은 발달하는 난모세포에 난황이 축적되는 과정으로, 이 과정의 개시는 알형성과정(oogenesis)을 제어하는 주 요 메커니즘이다. 곤충생리학 모델인 노랑초파리(Drosophila melanogaster)에서 난황형성과정은 성충으로 우화한 직후 시작하여 성적 성숙이 일어 나는 2-3일간 지속된다. 성숙한 난모세포가 충분히 만들어지고 성적 성숙이 종료되면, 짝짓기 후 알형성과정이 다시 시작될 때까지 난황형성과정은 멈춘다. 수컷 초파리의 정액 단백질인 성 펩타이드(Sex peptide, SP)는 짝짓기의 신호로서 알라타체(corpora allata)를 자극해 유약호르몬 (Juvenile hormone, JH) 생합성 및 분비를 유도하며, 혈림프(hemolymph) JH 농도의 증가는 난황형성과정을 자극한다. 최근 연구 결과에 따르 면, SP수용체 뉴런은 자궁 내막의 수상돌기를 통해 교미 중 정액과 함께 자궁으로 전달된 SP를 감지함으로써, 축삭돌기를 통해 중추신경계인 복부 신경절에 짝짓기 신호를 보내는데, 이러한 중추신경계 SP 신호가 JH 생합성 및 분비, 그리고 난황형성과정을 유도하는 것으로 밝혀졌다. 짝짓기 후 암컷에서의 난황형성과정은 일주기 리듬을 보이는데, 노랑초파리의 일주기 리듬은 중추 신경계 뉴런들에 의해 제어된다. 본 종설은 성적 성숙, 짝짓기 신호, 그리고 일주기 리듬에 따라 난황형성과정을 제어하는 신경 메커니즘에 관한 최근 연구 성과를 다룬다.

High-performance carbon materials were prepared via a one-step molten salt carbonization of tobacco waste used as electrode materials for supercapacitors. Carbon material prepared by carbonization for 3 h in molten CaCl2 at 850 °C exhibits hierarchically porous structure and ideal capacitive behavior. In a three-electrode configuration with 1 mol L− 1 H2SO4 aqueous solution, it delivers specific capacitance of 196.5 F g− 1 at 0.2 A g− 1, energy density of 27.2 Wh kg− 1 at 0.2 A g− 1, power density of 983.5 W kg− 1 at 2 A g− 1, and excellent cyclic stability with 94% capacitance retention after 5000 charge–discharge cycles at 1 A g− 1. Moreover, in a symmetrical two-electrode configuration with 6 mol L− 1 KOH aqueous solution, it delivers specific capacitance of 111.1 F g− 1 at 0.2 A g− 1, energy density of 3.8 Wh kg− 1 at 0.2 A g− 1, and power density of 482.0 W kg− 1 at 2 A g− 1. The relationship between hierarchically porous structure and capacitive performance is also discussed.

Porous mullite-corundum ceramics were prepared using organic foam impregnation method with alumina and silica as raw materials. The influence of alkaline treatment and surfactant modification on polyurethane foam were studied. Effects of sintering process and material composition on porous mullite-corundum ceramics were investigated. The results show that the hang-pulp quantity of polyurethane foam increases with alkaline treatment. After treatment with 3 wt% SDS solution, the hang-pulp quantity of polyurethane foam further improved. Open porosity of sample decreased with elevation of sintering temperature and holding time, and compressive strength of sample showed a trend opposite to the change of porosity. The open porosity of the sample was enhanced by the increase of m(Al2O3/SiO2); the compressive strength decreased with increase of m(Al2O3/SiO2). However, when m(Al2O3/SiO2) was 2.5, the compressive strength of the sample reached 6.23 MPa, and the open porosity of the sample was 80.7 %.

In this study, nitric acid oxidation with varied treatment temperature and time was conducted on the surfaces of polyacrylonitrile- based ultrahigh modulus carbon fibers. Scanning electron microscopy, X-ray photoelectron spectroscopy, Raman spectroscopy and surface tension/dynamic contact angle instruments were used to investigate changes in surface topography and chemical functionality before and after surface treatment. Results showed that the nitric acid oxidation of ultrahigh modulus carbon fibers resulted in decreases in the values of the crystallite thickness Lc and graphitization degree. Meanwhile, increased treating temperature and time made the decreases more obviously. The surfaces of ultrahigh modulus carbon fibers became much more activity and functionality after surface oxidation, e.g., the total surface energy of oxidized samples at 80 °C for 1 h increased by 27.7% compared with untreated fibers. Effects of surface nitric acid oxidation on the mechanical properties of ultrahigh modulus carbon fibers and its reinforced epoxy composites were also researched. Significant decreases happened to the tensile modulus of fibers due to decreased Lc value after the nitric acid oxidation. However, surface treatment had little effect on the tensile strength even as the treating temperature and processing time increased. The highest interfacial shear strength of ultrahigh modulus carbon fibers/epoxy composites increased by 25.7% after the nitric acid oxidation. In the final, surface oxidative mechanism of ultrahigh modulus carbon fibers in the nitric acid oxidation was studied. Different trends of the tensile strength and tensile modulus of fibers in the nitric acid oxidation resulted from the typical skin–core structure.