This paper addresses OFDM (orthogonal frequency division multiplexing) transmission over optical links with high spectral efficiency, i.e. by using high-order QAM-modulation schemes as a mapping method prior to the OFDM multicarrier representation. Here we address especially coherent optical OFDM modem in long distance. Numerical simulations of the coherent optical orthogonal frequency division...

Scheduling and dispatching tools for High-Performance Computing (HPC) machines have the role of mapping incoming jobs to the available resources, trying to maximize equipment utilization and user satisfaction. Optimal Job Scheduling is a well-known NP-hard problem, forcing commercial schedulers to adopt greedy approaches based on rules. Constraint Programming (CP) is a well-known combinatorial ...

We give a simple geometric explanation for the similarity transformation mapping one-dimensional conformal mechanics to free-particle system. Namely, we show that this transformation corresponds to the inversion of the Klein model of Lobachevsky space (non-compact complex projective plane) fI CP 1 . We also extend this picture to the N = 2k superconformal mechanics described in terms of Lobache...

This paper describes the development of a circularly polarized microstrip antenna, as a part of the Circularly Polarized Synthetic Aperture Radar (CP-SAR) sensor which is currently under developed at the Microwave Remote Sensing Laboratory (MRSL) in Chiba University. CP-SAR is a new type of sensor developed for the purpose of remote sensing. With this sensor, lower-noise data/image will be obta...

The use of encryption is essential to protect sensitive data, but it often poses challenges when comes locating and retrieving information without decryption. Searchable provides an effective mechanism that achieves secure search over encrypted data. In this paper a new approach address the fine-grained Blockchain Assisted ciphertext policy decentralized attribute-based (BA-CP-DABE) in cloud ha...

Cyclophosphamide (CP) is one of the anti-neoplastic drugs. Despite its numerous clinical applications, it has devastating effects on the testicles and declines the sperm quality in treated patients. This study was aimed to investigate the protective effect of crocin in improving the toxicity induced by CP in reproductive system. In this study, 24 male adult mice (6 to 8 weeks) were randomly div...