2,563 research outputs found
A Profile of Fatherhood Among Young Men: Moving Away from Their Birth Family and Closer to Their Child.
No full textHave things changed all that much in terms of how fatherhood is conceptualized and exercised in daily life? That is the question underlying this article. The author compares the findings of a recent analysis on certain aspects of the lived experiences of young fathers (under 25 years of age) with the results of studies undertaken over the past ten years, and replies in the affirmative. First of all, when considering the representations held of fathers or mothers, most of these young fathers believe that their role is a multi-faceted one, and that it is often identical to that of their spouse. According to young fathers, fatherhood is a dual experience that requires them to be present on a daily basis while also casting their eye on the future. This is an experience that is constructed out of affectionate moments, child-care duties, education in the literal sense, and especially out of shared experiences with their spouse. In addition, they question the degree to which involvement in a career should take precedence over involvement in their child's life. In other words, the former 'competes' with their ability to be present in their child's daily life, which denotes a change from the attitudes of previous generations.Fatherhood, Young Fathers, Representation, Paternal Identity, Qualitative Research
Enhancement of hydrogen evolution reaction performance of 3D pyrolytic carbon derived from 3D printing
No full textFabrication of novel 3D structured electrode for electrocatalytic hydrogen generation applications using additive manufacturing
No full textNovel 3D structured electrode fabrication as free-standing carbon lattice for Al–air batteries
No full text3D pyrolyzed carbon modified with g-C3N4@Ni electrodeposit for electrocatalytic hydrogen generation
No full textLiu wang qu: ge, ge ju.
No full text江陵詞 ; 雪厂曲 ; 集體編劇雪厂, 葉瓊, 江凌.Music in number notation.Jiang Ling ci ; Xuechang qu ; ji ti bian ju Xuechang, Ye Qiong, Jiang Ling
Selenization kinetics inCu2ZnSn(S,Se)4 solar cells prepared from nanoparticle inks
No full textEarth-abundant Cu2ZnSn(S,Se)4 (CZTSSe) thin film photovoltaic absorber layers are fabricated by annealing Cu2ZnSnS4 (CZTS) nanoparticle thin films in a selenium rich atmosphere. Systematic variation of the selenization time (5, 10, 20 and 40 min) and temperature (450, 500, 550 and 600 °C) provides insight into the kinetics of the selenization process and in particular recrystallization and grain growth. Se–S anion exchange is found to follow Avrami׳s model in which the CZTS selenization is controlled by an irregular one-dimensional process limited by metal cation re-ordering and grain boundary migration. CZTSSe grain growth is observed to follow a normal relation with a grain growth exponent close to the ideal case of equiaxed grains and the grain boundary migration energy is calculated to be 85.38 kJ/mol. These selenization variables have a fundamental influence on the quality of the resulting CZTSSe thin film and consequently the device performance. A peak device solar energy conversion efficiency of 5.4% was obtained for selenization at 500 °C for 20 min. The device efficiency was found to be highly sensitive to these variables and it is critical to obtain an appropriate balance between grain growth and thin film quality
Recent advances in surface functionalized 3D electrocatalyst for water splitting
No full textHydrogen is gaining attention as a fossil fuel alternative due to its potential to meet global energy demands. Producing hydrogen from water splitting is promising as a clean and sustainable fuel pathway. The hydrogen evolution reactions (HER) and oxygen evolution reaction (OER) are crucial in electrocatalytic water splitting for energy conversion and storage. However, water electrolysis faces challenges in cost, efficiency, and scalability. Alternative transition metal electrocatalysts and emerging 2D materials advance electrolysis research, though transitioning from academia to industry remains challenging. The introduction of 3D-printing technologies has revolutionized electrode fabrication for HER and OER. This review explores integrating 3D-printing technologies and surface functionalization with non-noble metal-based electrocatalysts and emerging 2D materials. It focuses on surface-functionalized 3D-printed electrodes using technologies like selective laser melting, stereolithography, and fused deposition modelling with non-noble metal electrocatalysts such as transition metal oxides, hydroxides, and emerging 2D materials like transition metal carbide/nitride (MXenes) and transition metal dichalcogenides (TMDCs). The review highlights the opportunities and challenges in scalable fabrication, long-term durability, and cost-efficiency for practical implementation. Future research directions include exploring new materials for 3D printing and alternative electrocatalysts alongside leveraging theoretical and machine-learning approaches to accelerate the development of competitive materials for water electrolysis
Author reponse: Plant trans-golgi network/early endosome pH regulation requires Cation Chloride Cotransporter (CCC1)
No full textThis is the Author response to article:Plant trans-Golgi network/early endosome pH regulation requires cation chloride cotransporter (CCC1) found at DOI: 10.7554/eLife.70701.Abstract not availableDaniel W McKay, Heather E McFarlane, Yue Qu, Apriadi Situmorang,
Matthew Gilliham, Stefanie Weg
The role of nanoparticle inks in determining the performance of solution processed Cu2ZnSn(S,Se)4thin film solar cells
No full textCu2ZnSnS4 (CZTS) nanoparticle inks synthesized by the injection of metal precursors into a hot surfactant offer an attractive route to the fabrication of Earth-abundant Cu2ZnSn(S,Se)4 (CZTSSe) thin film photovoltaic absorber layers. In this work it is shown that the chemical reaction conditions used to produce CZTS nanoparticle inks have a fundamental influence on the performance of thin film solar cells made by converting the nanoparticles to large CZTSSe grains in a selenium rich atmosphere and subsequent cell completion. The reaction time, temperature and cooling rate of the nanoparticle fabrication process are found to affect doping level, secondary phases and crystal structure respectively. Specifically, prolonging the reaction offers a new route to increase the concentration of acceptor levels in CZTSSe photovoltaic absorbers and results in higher device efficiency through an increase in the open circuit voltage and a reduction in parasitic resistance. Quenching the reaction by rapid cooling introduces a wurtzite crystal structure in the nanoparticles which significantly degrades the device performance, while elevating the reaction temperature of the nanoparticle synthesis introduces a secondary phase Cu2SnS3 in the nanoparticles and results in the highest cell efficiency of 6.26%. This is correlated with increased doping in the CZTSSe absorber and the results demonstrate a route to controlling this parameter
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