Quasi extended Chebyshev spaces (QEC-spaces for short) represent the largest class of spaces of sufficient regularity which are suitable for design [1]. In particular, they contain the well-known extended Chebyshev spaces as a special instance (and therefore can represent transcendental functions) as well as the so called variable degree polynomial spaces [2], that are very effective in handlin...

Abstract The unique features of quantum theory offer a powerful new paradigm for information processing. Translating these mathematical abstractions into useful algorithms and applications requires systems with significant complexity sufficiently low error rates. Such must be made from robust hardware that can coherently store, process, extract the encoded information, as well possess effective...

Most instruments used by occupational safety and health professionals have been originally developed in English. Cross-cultural adaptation enables the use of these instruments in other countries, cultures and languages in countries like Brazil, where the official language is not English. This methodology ensures that the translation process includes the cultural and linguistic equivalence betwe...

A recent Penning-trap measurement of the masses of V and Ti leads to a QEC value that disagrees significantly with the previously accepted value, and destroys overall consistency among the nine most precisely characterized T = 1 superallowed β emitters. This raises the possibility of a systematic discrepancy between Penning-trap measurements and the reaction-based measurements upon which the QE...

The task of preserving entanglement against noises is crucial importance for both quantum communication and information transfer. To this aim, error correction (QEC) codes may be employed to compensate, at least partially, the detriments induced by environmental noise that can modelled as a bit-flip or phase-flip channel. In paper we investigate effects simple three-qubit QEC restore nonlocalit...

In order to test the feasibility and sensitivity of the ergonomic exposure assessment tool Quick Exposure Check (QEC), a pilot-study was conducted. The aim was to test QEC in different occupational groups to compare the exposure in the most common work task with the exposure in the work task perceived as the most strenuous for the neck/shoulder region, and to test intra-observer reliability. On...

BACKGROUND Most of the available instruments aimed to assess risk exposure associated with work-related musculoskeletal disorders were originally developed in English, which makes their use difficult in countries such as Brazil. OBJECTIVE To test the clinimetric properties of the Quick Exposure Check (QEC) instrument previously adapted into Brazilian-Portuguese. METHOD The original version ...

We analyze the long-time behavior of a quantum computer running a quantum error correction QEC code in the presence of a correlated environment. Starting from a Hamiltonian formulation of realistic noise models, and assuming that QEC is indeed possible, we find formal expressions for the probability of a given syndrome history and the associated residual decoherence encoded in the reduced densi...

BACKGROUND Carpal tunnel syndrome (CTS) is common in the industrial setting. However,there is a controversy about the sole role of occupational ergonomic hazards in CTS. OBJECTIVES This study was conducted among assembling workers of a detergent factory and computer users with the aims of A) determination of CTS prevalence and B) evaluation of personal risk factors and level of exposure to oc...

The quantum computing devices of today have tens to hundreds qubits that are highly susceptible noise due unwanted interactions with their environment. theory error correction provides a scheme by which the effects such on states can be mitigated, paving way for realising robust, scalable computers. In this article we survey current landscape correcting (QEC) codes, focusing recent theoretical ...