2-(2,5-Dioxotetra­hydro­furan-3-yl)isoindoline-1,3-dione

In the title compound, C12H7NO5, the dihedral angle between the isoindole-1,3-dione plane and the least-squares plane of the furan ring is 89.2 (2)°. In the crystal structure, mol­ecules are linked through inter­molecular C—H⋯O hydrogen bonds, forming centrosymmetric dimers

Design and Implementation of a Wireless Sensor Network for Smart Homes

Wireless sensor networks (WSNs) have become indispensable to the realization of smart homes. The objective of this paper is to develop such a WSN that can be used to construct smart home systems. The focus is on the design and implementation of the wireless sensor node and the coordinator based on ZigBee technology. A monitoring system is built by taking advantage of the GPRS network. To support multi-hop communications, an improved routing algorithm based on the Dijkstra algorithm is presented. Preliminary simulations have been conducted to evaluate the performance of the algorithm.Comment: International Workshop on Mobile Cyber-Physical Systems (MobiCPS 2010), in conjunction with UIC2010, IEEE, Xi'an, China, 26 - 29 October, 201

(E)-N-[4-(Methyl­sulfon­yl)benzyl­idene]aniline

The mol­ecule of the title compound, C14H13NO2S, displays a trans configuration with respect to the C=N double bond. The dihedral angle between the two aromatic ring planes is 62.07 (18)°

Optimization of ultrafine entanglement witnesses

The ultrafine entanglement witness, introduced in [F. Shahandeh, M. Ringbauer, J.C. Loredo, and T.C. Ralph, Phys. Rev. Lett. \textbf{118}, 110502 (2017)], can seamlessly and easily improve any standard entanglement witness. In this paper, by combining the constraint and the test operators, we rotate the hyperplane determined by the test operator and improve further the original ultrafine entanglement witness. In particular, we present a series of new ultrafine entanglement witnesses, which not only can detect entangled states that the original ultrafine entanglement witnesses cannot detect, but also have the merits that the original ultrafine entanglement witnesses have.Comment: 8 page

(E)-2-Methyl-N-[4-(methyl­sulfon­yl)benzyl­idene]aniline

Mol­ecules of the title compound, C15H15NO2S, display an E configuration with respect to the C=N double bond. The crystal structure is stabilized by weak C—H⋯O hydrogen bonds. The dihedral angle between the two aromatic ring planes is 50.41 (12)°