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Sadeeq Ullah,Benoît D.L. Campéon,Shumaila Ibraheem,Ghulam Yasin,Rajesh Pathak,Yuta Nishina,Tuan Anh Nguyen,Yassine Slimani,Qipeng Yuan 한국공업화학회 2021 Journal of Industrial and Engineering Chemistry Vol.101 No.-
Two-dimensional (2D) materials are generally expected to have superior lithium-ion (LIBs) performancescompare with their bulk counterpart as they display superior specific surface area. In this context, thedevelopment of 2D maghemite would be of great interest owing to its high theoretical specific capacity,natural abundance, and relatively low cost and toxicity; however, maghemite do not have a layered crystallinestructure. Herein, to overcome this hindrance, c-Fe2O3 has been enclosed within a 2D carbonmatrix via a simple and facile synthesis strategy based on the complexation of ethylene glycol with aqueousiron species by hydrolysis and condensation reactions followed by its carbonization. As obtained 2Dcarbon c-Fe2O3 nanosheet composite (CEG-Fe) is composed of 41.3 wt.% carbon and 10.2 wt.% Fe. Whenused as anode materials in LIBs, CEG-Fe demonstrated the enhanced initial discharge capacity of1589 mAh g 1 at 100 mA g 1, and outstanding ultralong cycling performance with the significant stablecapacity of 700 mAh g 1 and 230 mAh g 1 at the higher current rate of 0.5 A g 1 and 10 A g 1 for morethan 300 and 6000 cycles, respectively. These results enable a promising avenue to design the large-scaleproduction of 2D CEG-Fe sheets-based nanostructured anode materials for next-generation LIBs for largescaleenergy storage applications.
Bradley Camp Davis 고려대학교 민족문화연구원 2014 Cross-Currents Vol.- No.11
This article contributes to the continuing discussion concerning the changing relationships between China and its neighbors in the nineteenth century. Focusing on Vietnam, a country within the metaphorical framework of the “tribute system,” it analyzes the complex range of relationships in the borderlands during the 1870s. Following the establishment of French consular offices in northern Vietnam, rebellions, counterinsurgency, communities, and commerce in the borderlands fell under a new kind of official gaze, one that ultimately provided self-serving justification to advocates of French imperialism in Southeast Asia. As emblems of foreign influence, French consulates soon became elements in factional struggles that unfolded within the Vietnamese bureaucracy over the role of China in Vietnam, the employment of surrendered bandits as officials, and borderlands administration.
CYCLIST TARGET AND TEST SETUP FOR EVALUATION OF CYCLIST-AUTONOMOUS EMERGENCY BRAKING
Olaf Op den Camp,Sjef van Montfort,Jeroen Uittenbogaard,Joke Welten 한국자동차공학회 2017 International journal of automotive technology Vol.18 No.6
From 2018, Autonomous Emergency Braking (AEB) systems dedicated to avoid or mitigate passenger car-tocyclist collisions will be considered in the safety assessment by Euro NCAP. To test such systems, appropriate equipment has been developed in a project called CATS “Cyclist-AEB Testing System”, that has run between April 2014 and August 2016. Moreover, a proposal for the most relevant test scenarios was set up. The objective of the project was to provide proof to Euro NCAP of the relevance of the proposed test scenarios and of the feasibility of practical implementation of the scenarios and test setup. The process regarding the selection, verification and validation of test scenarios is described. The cooperation between 17 industrial partners (car manufacturers and automotive suppliers) in the CATS project has stimulated the harmonization and acceptance of the protocol, target and test setup. The process and intermediate results including the used methodology, have been reviewed by the German Federal Highway Research Institute (BASt) and have been shared on a regular basis during the project with stakeholders in Europe, Japan and the USA. Euro NCAP already indicated to consider the results of the CATS project as the main input to draft the test protocol, including scenarios and target for Cyclist-AEB systems in 2018 and 2020.
Radiometric Resolution of Motion-Induced Synthetic Aperture Radiometer
Hyuk Park,Camps, A.,Min Gyu Choi,Yong-Hoon Kim IEEE 2011 IEEE geoscience and remote sensing letters Vol.8 No.4
<P>The radiometric resolution of a motion-induced synthetic aperture radiometer (MISAR) is analytically obtained from the standard deviation of a baseline response, an observation scenario, and the imaging method of the MISAR. The intrinsic long integration time given by the whole dwell time on moving platforms improves the radiometric resolution compared with the snapshot resolution of other nominal synthetic aperture radiometers. In addition, it is illustrated that the MISAR imaging holds the tradeoff relationship between the radiometric and spatial resolutions.</P>
An explicit time-integration method for damped structural systems
Pezeshk, S.,Camp, C.V. Techno-Press 1995 Structural Engineering and Mechanics, An Int'l Jou Vol.3 No.2
A damped trapezoidal rule method for numerical time-integration is presented, and its application in analyses of dynamic response of damped structures is discussed. It is shown that the damped trapezoidal rule method has features that make it an attractive approach for applications in dynamic analyses of structures. Accuracy and stability analyses are developed for the damped single-degree-of-freedom systems. Error analyses are also performed for the Newmark beta method and compared with the damped trapezoidal rule method as a basis for discussion of the relative merits of the proposed method. The procedure is fully explicit and easy to implement. However, since the method is an explicit method, it is conditionally stable. The methodology is applied to several example problems to illustrate its strengths, limitations and inherent simplicity.
Large-Scale Refinement of Metal−Organic Framework Structures Using Density Functional Theory
Nazarian, Dalar,Camp, Jeffrey S.,Chung, Yongchul G.,Snurr, Randall Q.,Sholl, David S. American Chemical Society 2017 Chemistry of materials Vol.29 No.6
<P>Efforts to computationally characterize large numbers of nanoporous materials often rely on databases of experimentally resolved crystal structures. The accuracy of experimental crystal structures used in such calculations has a significant impact on the reliability of the results. In this work, we report structures optimized using periodic density functional theory (DFT) for more than 800 experimentally synthesized metal-organic frameworks (MOFs). Many MOFs changed significantly upon structural optimization, particularly materials that were crystallographically resolved in their solvated form. For each MOF, we simulated the adsorption of CH4 and CO2 using grand canonical Monte Carlo both before and after DFT optimization. The DFT optimization has a large impact on simulated gas adsorption in some cases. For example, CO2 loading at 1 bar changed by more than 25% in over 25% of the MOFs we considered.</P>