Redox couples based on cobalt complexes were found to be effective in regenerating both inorganic CdSe quantum dot- and organic dye-sensitizers. The hybrid sensitizer composed of CdSe QD and ruthenium sensitizer (Z907Na) dye showed a maximum power conversion efficiency of 4.76% on using cobalt(o-phen)(3)(2+/3+) as a common redox mediator.

Powerful rate-compatible codes are essential for achieving high throughput in hybrid automatic repeat request (ARQ) systems for networks utilising packet data transmission. The paper focuses on the construction of efficient rate-compatible low-density parity-check (RC-LDPC) codes over a wide range of rates. Two LDPC code families are considered; namely, regular LDPC codes which are known for go...

Extending the philosophy of additive Schwarz algorithms, we adopt a hybrid framework that allows different subdomains to use different mathematical models, spatial discretizations, local meshes, and serial codes. This hybrid software framework is implemented using objectoriented techniques, such that existing serial codes are easily reused after being equipped with the standard interface of a g...

In our previous work, we have proposed a hybrid typeII Automatic Repeat reQuest (ARQ) scheme (Scheme 5) based on the Rate Compatible Punctured Convolutional (RCPC) codes which performs significantly better than all the other ARQ schemes in all the channel conditions. In this work, we study the performance of Scheme 5 based on High Rate Optimized RCPC (HRO-RCPC) codes combined with simple repeti...

We study the data reliability problem for a community of devices forming a mobile cloud storage system. We consider the application of regenerating codes for file maintenance within a geographically-limited area. Such codes require lower bandwidth to regenerate lost data fragments compared to file replication or reconstruction. We investigate threshold-based repair strategies where data repair ...

The real world scenario of cloud is users wish to store massive data in to the cloud database. So, Cloud must store the data without any failure. Sometimes, the data is striped across multiple cloud vendors. If a cloud suffers from a permanent failure and loses all its data, we need to repair the lost data with the help of the other surviving clouds to preserve data redundancy. We present a pro...

Hybrid codes simultaneously encode both quantum and classical information into physical qubits. We give several general results about hybrid codes, most notably that the comprising a genuine code must be impure can always detect more errors than comparable codes. also introduce weight enumerators for which we then use to derive linear programming bounds. Finally, inspired by construction of som...

Three constructions of minimum storage regenerating (MSR) codes are presented. The first two constructions provide access-optimal MSR codes, with two and three parities, respectively, which attain the sub-packetization bound for access-optimal codes. The third construction provides larger MSR codes with three parities, which are not access-optimal, and do not necessarily attain the sub-packetiz...