17,429 research outputs found
Malaysian Chinese folk beliefs on Facebook based on LDA topic modelling
No full text1. orginal data collected manually from Facebook
2. Appendix 1：the terms of 191 deities
3. Appendix 2: the English version of top 30 high-freguency terms for four topic
“It is not simply the loss of a child”: The challenges facing parents who have lost their only child in post-reproductive age in China
No full textThe death of one’s only child in post-reproductive age (in Chinese, shidu) is a traumatic event that has specific cultural implications in China. This study investigates the experience of a changed life and emerging challenges amongst Chinese shidu parents. Thematic analysis of 36 interviews revealed four main life consequences following shidu: impairment of psychological and physical health, weakening of social networks and interactions, loss of meaning in life, and lack of care and security. We suggest that health monitoring and mental health intervention, adequate social and community support, and improved social security are the critical needs in this vulnerable group
Graphene nanocomposites
No full textGraphene, one of the allotropes (diamond, carbon nanotube, and fullerene) of carbon, is a monolayer of honeycomb lattice of carbon atoms discovered in 2004. The Nobel Prize in Physics 2010 was awarded to Andre Geim and Konstantin Novoselov for their ground breaking experiments on the twodimensional graphene [1]. Since its discovery, the research communities have shown a lot of interest in this novel material owing to its unique properties. As shown in Figure 1, the number of publications on graphene has dramatically increased in recent years. It has been confirmed that graphene possesses very peculiar electrical properties such as anomalous quantum hall effect, and high electron mobility at room temperature (250000 cm2/Vs). Graphene is also one of the stiffest (modulus ~1 TPa) and strongest (strength ~100 GPa) materials. In addition, it has exceptional thermal conductivity (5000 Wm-1K-1). Based on these exceptional properties, graphene has found its applications in various fields such as field effect devices, sensors, electrodes, solar cells, energy storage devices and nanocomposites. Only adding 1 volume per cent graphene into polymer (e.g. polystyrene), the nanocomposite has a conductivity of ~0.1 Sm-1 [2], sufficient for many electrical applications. Significant improvement in strength, fracture toughness and fatigue strength has also been achieved in these nanocomposites [3-5]. Therefore, graphene-polymer nanocomposites have demonstrated a great potential to serve as next generation functional or structural materials
Acetic acid and butyrate production in two continuous experiments
No full textdata about：Acetic acid and butyrate production in two continuous experiments and High-throughput map of microbe from bio-cathod
PERFORMANCE FOLLOWING: TRACKING A PERFORMANCE WITHOUT A SCORE
No full textEPSRC Doctoral Training Award; EPSRC Leadership Fellowshi
A new cohesive model for simulating delamination propagation in composite laminates under transverse loads
No full textIn this paper, we propose a new cohesive model to stably and accurately simulate the\ud
delamination propagations in composite laminates under quasi-static and low-velocity\ud
impact transverse loads using comparatively coarse meshes. In this model, a pre-softening\ud
zone ahead of the existing traditional softening zone is proposed. In this pre-softening zone,\ud
the initial stiffnesses and the interface strengths at the integration points of cohesive elements\ud
are gradually reduced as the corresponding effective relative displacements at these\ud
points increase. However, the onset displacement corresponding to the onset damage is\ud
not changed in this model. Moreover, the fracture toughness of materials for determining\ud
the final displacement of complete decohesion is kept constant. This cohesive model is\ud
implemented in the explicit time integration scheme combined with a powerful threedimensional\ud
(3D) hybrid finite element for evaluating the delamination propagations on\ud
interfaces in composite laminates. A DCB problem is employed to analyze the characteristics\ud
of the present cohesive model. In order to reduce the computational cost for dealing\ud
with more complex problems, a stress-based criterion is also adopted in our numerical\ud
model for evaluating various in-plane damages, such as matrix cracks, fiber breakage,\ud
etc. Finally, two experimental examples are employed to illustrate the validity of the present\ud
approach
Physical, chemical and biological subsoiling for sustainable agriculture
No full textSubsoil degradation – mainly through strong compaction (to density > 1.6 g cm−3) by intensive agriculture with heavy machinery – is a global problem for soil health, crop production, carbon sequestration, and the environment. Subsoiling is a field measure to improve the physical, chemical, and biological properties of the soil below the common plowing depth to increase crop yields, water and nutrient use efficiency, economic benefits, and ecological functions. Traditionally, physical (phy-), chemical (chem-) or biological (bio-) subsoiling approaches are used to recover degraded subsoils, whereas their combination was disregarded. This review summarizes current knowledge on subsoiling approaches and their effects on soil properties, crop production, carbon storage and other ecosystem functions. A meta-analysis showed that phy-subsoiling boosts crop yields by 19 % on average, with a temporal decrease in organic carbon content in the topsoil compared to no-till cultivation. Phy-subsoiling is necessary but not sufficient to completely resolve tillage pan compaction problems. Bio- and chem-subsoiling combined with phy-subsoiling very efficiently increase the full range of soil fertility properties for a long duration, raising crop yields and strengthening economic benefits because the combination retains the advantages while reducing the shortcomings of individual subsoiling approaches. Thus, farmers should upgrade phy-subsoiling with bio-approaches, including the use of deep-rooted crops and straw incorporation, and chem-subsoiling modes, including manuring and liming.http://dx.doi.org/10.13039/100016694 Science and Technology Development Plan of Shandong Provincehttp://dx.doi.org/10.13039/501100018647 RUDN Universit
An Optimal Rule for Switching over to Renewable fuels with Lower Price Volatility: A Case of Jump Diffusion Process
No full textThis study investigates the optimal switching boundary to a renewable fuel when oil prices exhibit continuous random fluctuations along with occasional discontinuous jumps. In this paper, oil prices are modeled to follow jump diffusion processes. A completeness result is derived. Given that the market is complete the value of a contingent claim is risk neutral expectation of the discounted pay off process. Using the contingent claim analysis of investment under uncertainty, the Hamilton-Jacobi-Bellman (HJB) equation is derived for finding value function and optimal switching boundary. We get a mixed differential-difference equation which would be solved using numerical methods.Demand and Price Analysis, Resource /Energy Economics and Policy,
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