Re(I) Complexes as Backbone Substituents and Cross-Linking Agents for Hybrid Luminescent Polysiloxanes and Silicone Rubbers

This study focuses on the synthesis of hybrid luminescent polysiloxanes and silicone rubbers grafted by organometallic rhenium(I) complexes using Cu(I)-catalyzed azido-alkyne cycloaddition (CuAAC). The design of the rhenium(I) complexes includes using a diimine ligand to create an MLCT luminescent center and the introduction of a triple C≡C bond on the periphery of the ligand environment to provide click-reaction capability. Poly(3-azidopropylmethylsiloxane-co-dimethylsiloxane) (N3-PDMS) was synthesized for incorporation of azide function in polysiloxane chain. [Re(CO)3(MeCN)(5-(4-ethynylphenyl)-2,2′-bipyridine)]OTf (Re1) luminescent complex was used to prepare a luminescent copolymer with N3-PDMS (Re1-PDMS), while [Re(CO)3Cl(5,5′-diethynyl-2,2′-bipyridine)] (Re2) was used as a luminescent cross-linking agent of N3-PDMS to obtain luminescent silicone rubber (Re2-PDMS). The examination of photophysical properties of the hybrid polymer materials obtained show that emission profile of Re(I) moiety remains unchanged and metallocenter allows to control the creation of polysiloxane-based materials with specified properties.

A Pt-free graphenaceous composite as an electro-catalyst for efficient oxygen reduction reaction

The MgO decorated multi-layered graphene oxide (MLGO) catalyst exhibit an efficient oxygen reduction reaction capability with high activity and durability.

Volatilization behavior of tin during carbothermic reduction of tin-bearing middling to recover tin

A new method for selecting reducing agent was proposed in this study. This study dedicated to recovery of tin from tinbearing middling by carbothermic reduction. Volatilization behavior of tin during carbothermic reduction was systematically studied, including the tin volatilization thermodynamics and kinetics, the selecting method of reducing agent, the effects of reducing agent, reduction temperature and effect of time on the tin volatilization rate. The thermodynamic results showed that the SnO2 was reduced to SnO by controlling CO% in the range of 9%~15%, and then volatilized as SnO. The reduction efficiency and the reaction capability with CO2 of three reducing agent were investigated, which indicated tin volatilization was close in nature to the reductant, and it was beneficial to the volatilization by using the coke powder. The experiment results show that the volatilization ratio of tin can reach more than 81.34% when the coke powder is used as the reducing agent at 900?C for 2h. The kinetic of tin volatilization during the reduction roasting process showed that the reaction was controlled by the interface chemical reaction and the activation energy of the reaction was 44.66 kJ/mol.

Ultrasonic Nano-Crystal Surface Modification Assisted Gas Nitriding of Ti6Al4V Alloy

The effects of Ultrasonic Nanocrystal Surface Modification (UNSM) on the gas nitriding of Ti6Al4V alloy has been investigated. The gas nitriding was performed at 700 and 800 °C. The microstructure after UNSM and gas nitriding was characterized using X-ray diffraction and scanning electron microscopy. Microstructural investigations revealed the formation of an approximately 10 μm thick severe plastic deformation (SPD) layer after UNSM treatment. After nitriding at 700 °C and 800 °C, a compound layer consisting of an approximately 0.2 μm and 1.9 μm thick nitride layer was observed in UNSM-treated Ti6Al4V alloy, which exhibits a nearly two-fold increase in nitride layer thickness as compared with the un-treated sample. This suggests that the nitrogen adsorption and the reaction capability are enhanced in the UNSM-treated Ti6Al4V alloy. This enhancement can be attributed to the high density dislocations and grain boundaries introduced by UNSM that serve as efficient diffusivity channels for interstitial gaseous atoms.

A New Integrated Border Security Approach: The FP7 PERSEUS Project

PERSEUS (Protection of European Borders and Seas Through the Intelligent Use of Surveillance) was selected as a demonstration project in the FP7 Security call FP7-SEC-2010-1. Its goals were to define and demonstrate a European concept for maritime surveillance systems and to deploy it across the Mediterranean and Atlantic Ocean. The systems were set to operate in a real-life environment by exercising a comprehensive set of maritime surveillance cross-border scenarios between 2013 and 2015. During its 4.5 years, it involved 32 partners from 12 countries with a budget of 42M€. PERSEUS is set in the EUROSUR policy context. EUROSUR is the information exchange framework designed to improve the management of Europe's external borders. It aims to support member states by increasing their situational awareness and reaction capability in combating cross-border crime, tackling irregular migration, and preventing loss of migrant lives at sea. However, it also is in the reality of the existing national and regional systems operated by each member state to monitor its own maritime space. The PERSEUS project delivered successful results in three different domains. Some of them are a validated solution enabling shared surveillance of maritime borders (operational); an architecture, domain, target vision, and processes contributing to EUROSUR (integration); and recommendations and lessons learned toward evolving collaborative maritime surveillance policies (best practices). The line followed by PERSEUS using autonomous maritime surveillance systems such as the Wave Glider (<ext-link ext-link-type="uri" href="http://www.liquidr.com">http://www.liquidr.com</ext-link>) opens new research lines for future collaboration opportunities.

A method for track fusing using data association in naval combat system

In today battlefield multi-sensors installed on naval ship are acquiring too much information. Information is used through naval combat system to improve reaction capability to threat more quickly and precise. For acting to threat, we have to make a decision whether same ones what each target from multi sensor and execute track fusion according to result of judgment. So in this paper, we propose the track fusion method using track’s varied information. We predicted and estimated the target state based on dynamic information using data association filter so made valid measurement area what is assumed that track exists. This algorithm can set up the criterion what is adaptive current status of track. Second we selected track among existing tracks in valid area by attributing weighting. The weight considers track’s information like identification, category and so on. We would like to execute more precisely track fusion through this fusion algorithm.