This paper presents a wireless sensor network security data fusion algorithm which has data integrity and privacy protection. Firstly, using homomorphism encryption algorithm realizes the data privacy; using the key message authentication code based on hash function guarantees the freshness of data; using Tesla μ authentication technique ensures the reliability of information query. Then, CRT t...

Many applications, such as e-commerce, routinely use copies of data that are not in sync with the database due to heuristic caching strategies used to enhance performance. We study concurrency control for a transactional model that allows update transactions to read out-of-date copies. Each read operation carries a “freshness constraint” that specifies how fresh a copy must be in order to be re...

Wireless sensor networks (WSNs) are vulnerable to various forms of security attacks because they are deployed in potentially adverse or even hostile environment. Research into security and routing mechanism designs specifically focused on WSNs has been challenging issues to researchers. Recently, Choi et al. proposed a secure data gathering protocol over WSNs based on an extended Sakai et al.’s...

In this paper, we investigate the problem of providing scalability to data Extraction, Transformation, Load and Querying (ETL+Q) process of data warehouses. In general, data loading, transformation and integration are heavy tasks that are performed only periodically. Parallel architectures and mechanisms are able to optimize the ETL process by speedingup each part of the pipeline process as mor...

The effects of three concentrations (0.2%, 1% and 3%) of rosemary oil (RO) on the freshness indicators, oxidative stability, fatty acid and biogenic amine (BA) contents of minced rainbow trout muscle (MTM) were investigated after different periods of storage (three and nine days) at 4 ± 1 °C. Moreover, the terpene and sesquiterpene contents in the treated MTM were also measured. RO treatment im...

An electronic nose (e-nose) was used to establish a freshness evaluation model for pork. A pre-experiment was performed to acquire optimum parameters (10 g sample mass with 5 min headspace-generation time in 500 mL vial) for later e-nose detection of pork. Responding signals of the enose were extracted and analyzed. Linear Discriminant Analysis (LDA) results showed that the e-nose could classif...

Pequod is a distributed application-level key-value cache that supports declaratively defined, incrementally maintained, dynamic, partially-materialized views. These views, which we call cache joins, can simplify application development by shifting the burden of view maintenance onto the cache. Cache joins define relationships among key ranges; using cache joins, Pequod calculates views on dema...

We define and study a real-time producers/consumers problem, where the production/consumption relations are nondeterministic. In other words, a consumer can get one unit of resources from any one of the producers, and one producer can provide one unit of resources for any one of the consumers. Furthermore, a producer for one type of resourcesmight be the consumer for another type of resources. ...

The use of trained panels and scalar systems is quite common in the measurement of freshness of fish by sensory methods, but not common in published papers on the subject to include any statistical analysis of the errors involved in using a scalar procedure or any treatment of the biases of the assessors. The statistical analysis is quite straightforward and can be performed on computer spreads...

Climate change has brought about huge environmental problems and economic losses worldwide, low carbon become a hot topic of research in the context climate crisis. The article outlines three-tier food supply chain consisting suppliers, manufacturers retailers, based on cooperative model which share cost emission reduction retailers freshness. study finds that when government grants maximum amo...