233 research outputs found
Does Health Insurance Coverage Lead to Better Health and Educational Outcomes? Evidence from Rural China
No full textUsing 2006 China Agricultural Census (CAC), we examine whether the introduction of the New Cooperative Medical System (NCMS) has affected child mortality, maternal mortality, and school enrollment of the 6-16 years olds. Our data cover 5.9 million people living in eight low-income rural counties, of which four adopted the NCMS by 2006 and four did not adopt it until 2007. Raw data suggest that enrolling in NCMS is associated with better school enrollment and lower mortality of young children and pregnant women. However, using a difference-in-difference propensity score method, we find most of these differences are driven by the endogenous introduction and take-up of NCMS, and out method overcomes classical propensity score matching's failure to address the selection bias. While the NCMS does not affect child mortality and maternal mortality, it does help improve the school enrollment of six-year-olds.
CSD 2045443: Experimental Crystal Structure Determination
No full textRelated Article: Kunpeng Zhao, Espen Eikeland, Dongsheng He, Wujie Qiu, Zhicheng Jin, Qingfeng Song, Tian-ran Wei, Pengfei Qiu, Jianjun Liu, Jiaqing He, Bo Brummerstedt Iversen, Jian He, Lidong Chen, Xun Shi|2021|Joule|5|1183|doi:10.1016/j.joule.2021.03.01
CSD 2045445: Experimental Crystal Structure Determination
No full textRelated Article: Kunpeng Zhao, Espen Eikeland, Dongsheng He, Wujie Qiu, Zhicheng Jin, Qingfeng Song, Tian-ran Wei, Pengfei Qiu, Jianjun Liu, Jiaqing He, Bo Brummerstedt Iversen, Jian He, Lidong Chen, Xun Shi|2021|Joule|5|1183|doi:10.1016/j.joule.2021.03.01
CSD 2045444: Experimental Crystal Structure Determination
No full textRelated Article: Kunpeng Zhao, Espen Eikeland, Dongsheng He, Wujie Qiu, Zhicheng Jin, Qingfeng Song, Tian-ran Wei, Pengfei Qiu, Jianjun Liu, Jiaqing He, Bo Brummerstedt Iversen, Jian He, Lidong Chen, Xun Shi|2021|Joule|5|1183|doi:10.1016/j.joule.2021.03.01
Novel calixarene-based porous organic polymers with superfast removal rate and ultrahigh adsorption capacity for selective separation of cationic dyes
No full textExploring novel porous adsorbents for efficient water purification is a significant and urgent task. Two novel calixarene-based porous organic polymers (POPs) namely POP-8F and POP-10F were synthesized via a simple and mild reaction using octafluoronaphthalene and decafluorobiphenyl as the crosslinker. The Fourier transform infrared spectrometer, solid-state 13C NMR spectra prove the successful construction of the POPs, and thermal gravimetric analyzer curves demonstrate the good thermal stabilities. Combining the advantages of porous structures, abundant adsorption sites and electronegative natures, both POP-8F and POP-10F exhibit extraordinary adsorption capacities and rates towards cationic dyes including Rhodamine B (RhB), methylene blue (MB) and crystal violet (CV). Especially for RhB, the removal efficiency can reach nearly 99 % within 4 min and the pseudo-second-order rate constant of POP-8F is 0.04386 g mg−1 min−1. Notably, the maximum adsorption capacity of POP-8F towards RhB is 2433 mg g−1, surpassing all the previously reported porous adsorbents including covalent organic frameworks, metal organic frameworks, POPs, biomass adsorbents, activated carbons, etc. In addition, both POP-8F and POP-10F can selectively adsorb cationic dyes among the mixtures of cationic dyes and anionic dyes. More importantly, the calixarene-based POPs can efficiently remove cationic dyes through a simple column filtration and exhibit excellent reusability properties. All the above characteristics make POP-8F and POP-10F excellent porous adsorbents for water pollutant treatment and purificatio
“JUSTICE” In Architecture
No full textThe Degree Book is a comprehensive account of the author’s academic journey in pursuing the Master of Science in Advanced Architectural Design (M.S. AAD) - Architecture and Representation at Cornell University. The book encompasses various aspects of the author’s academic work, including design projects, research, elective courses, and architectural theory.During the author’s studies, a significant realization was the importance of designing architecture with the objective of helping residents, communities, and the environment. This realization led to a deeper understanding of the concept of “justice” in architecture. The author identifies sustainable design as a prime example of “environmental justice” and acknowledges that architecture has the potential to create causal relationships between space or technology and various forms of “justice”. The book discusses the author’s design projects, and how they are inspired by the concept of “justice” in architecture. The author revisits the projects to evaluate how the author created a causal relationship between space, technology, and “justice”. The author also examines how “justice” has affected the author’s design thinking. The Degree Book also includes a discussion of emerging technologies, digital and generative design, new drawing and media space, and their impact on the field of architecture. The author acknowledges the importance of understanding these emerging technologies to better express and display research results. In conclusion, the author posits that architecture in the new era should focus on realizing various social, cultural, racial, and environmental design concepts of “justice”. The author recognizes that architects have a responsibility to design for the betterment of society and that architecture can play a crucial role in creating a just and equitable world. The Degree Book is an insightful and inspiring account of the author’s academic journey
Multiferroic CoFe2O4-BiFeO3 core-shell nanofibers and their nanoscale magnetoelectric coupling
No full textMultiferroic CoFe2O4-BiFeO3 (CFO-BFO) core-shell nanofibers were synthesized by coaxial electrospinning. The spinel structure of CFO and perovskite structure of BFO were confirmed by x-ray diffraction and high-resolution transmission electron microscopy. The core-shell configuration of nanofibers was verified by scanning electron microscopy and transmission electron microscopy images. The macroscopic ferromagnetic property of core-shell nanofibers was demonstrated by magnetic hysteresis loop. The local magnetoelectric (ME) coupling was confirmed by using dual frequency piezoresponse force microscopy (PFM) under an external magnetic field, showing magnetically induced evolution of piezoresponse and domain structure. The ferroelectric characteristics are demonstrated by the switching spectroscopy PFM. From PFM hysteresis and butterfly loops, it is observed that the piezoresponse amplitude is reduced while coercive voltage increased under external in-plane magnetic field, induced through the mechanical interactions between magnetostrictive CFO and piezoelectric BFO, from which the lateral ME coupling can be estimated quantitatively. The nanofibers thus can find a variety of applications as a one-dimensional multiferroic material
Ferroelectric control of magnetism in P(VDF-TrFE)/Co heterostructure
No full textMultiferroic magnetoelectric composite systems such as ferroelectric and ferromagnetic heterostructures have attracted an interest recently and have the potential applications such as four state memories, magnetic sensor and spintronics. In this study, we focus on the ferroelectric copolymer/ferromagnetic Co multiferroic film. The ferroelectric copolymer poly(vinylidene fluoride-trifluoroethylene) was fabricated by Langmuir-Blodgett deposition technique. Large magnetization changes of the Co films emerge in response to ferroelectric switching of poly(vinylidene fluoride-trifluoroethylene) controlled by applied electric field. The magnetization of the Co films was detected by the magneto-optical Kerr effect system. Although ferroelectric polymer poly(vinylidene fluoride-trifluoroethylene) have the lower piezoelectric coefficient about 30 pC/N than inorganic ferroelectrics, interface strain coupling is also the primary mechanism altering the induced magnetic anisotropy in the poly(vinylidene fluoride-trifluoroethylene)/Co heterostructure
Nash equilibrium based semantic cache in mobile sensor grid database systems
No full textMobile applications are being increasingly deployed on a massive scale in various mobile sensor grid database systems. With limited resources from the mobile devices, how to process the huge number of queries from mobile users with distributed sensor grid databases becomes a critical problem for such mobile systems. While the fundamental semantic cache technique has been investigated for query optimization in sensor grid database systems, the problem is still difficult due to the fact that more realistic multi-dimensional constraints have not been considered in existing methods. To solve the problem, a new semantic cache scheme is presented in this paper for location-dependent data queries in distributed sensor grid database systems. It considers multi-dimensional constraints or factors in a unified cost model architecture, determines the parameters of the cost model in the scheme by using the concept of Nash equilibrium from game theory, and makes semantic cache decisions from the established cost model. The scenarios of three factors of semantic, time and locations are investigated as special cases, which improve existing methods. Experiments are conducted to demonstrate the semantic cache scheme presented in this paper for distributed sensor grid database systems
Effect of epitaxial strain and lattice mismatch on magnetic and transport behaviors in metamagnetic FeRh thin films
No full textWe grew 80 nm FeRh films on different single crystals with various lattice constants. FeRh films on SrTiO3 (STO) and MgO substrates exhibit an epitaxial growth of 45° in-plane structure rotation. In contrast, FeRh on LaAlO3 (LAO) displays a mixed epitaxial growth of both 45° in-plane structure rotation and cube-on-cube relationships. Due to the different epitaxial growth strains and lattice mismatch values, the critical temperature for the magnetic phase transition of FeRh can be changed between 405 and 360 K. In addition, the external magnetic field can shift this critical temperature to low temperature in different rates for FeRh films grown on different substrates. The magnetoresistance appears a maximum value at different temperatures between 320 and 380 K for FeRh films grown on different substrates
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