Quantum Characterization of a Werner-like Mixture

We introduce a Werner-like mixture [R. F. Werner, Phys. Rev. A {\bf 40}, 4277 (1989)] by considering two correlated but different degrees of freedom, one with discrete variables and the other with continuous variables. We evaluate the mixedness of this state, and its degree of entanglement establishing its usefulness for quantum information processing like quantum teleportation. Then, we provide its tomographic characterization. Finally, we show how such a mixture can be generated and measured in a trapped system like one electron in a Penning trap.Comment: 8 pages ReVTeX, 8 eps figure

Contractive Schroedinger cat states for a free mass

Contractive states for a free quantum particle were introduced by Yuen [Yuen H P 1983 Phys. Rev. Lett. 51, 719] in an attempt to evade the standard quantum limit for repeated position measurements. We show how appropriate families of two- and three component ``Schroedinger cat states'' are able to support non-trivial correlations between the position and momentum observables leading to contractive behavior. The existence of contractive Schroedinger cat states is suggestive of potential novel roles of non-classical states for precision measurement schemes.Comment: 24 pages, 7 encapsulated eps color figures, REVTeX4 style. Published online in New Journal of Physics 5 (2003) 5.1-5.21. Higher-resolution figures available in published version. (accessible at http://www.njp.org/

Synthesis and characterization of entangled mesoscopic superpositions for a trapped electron

We propose a scheme for the generation and reconstruction of entangled states between the internal and external (motional) degrees of freedom of a trapped electron. Such states also exhibit quantum coherence at a mesoscopic level.Comment: 4 pages, 1 figure, RevTeX (twocolumn

The Pauli Equation for Probability Distributions

The "marginal" distributions for measurable coordinate and spin projection is introduced. Then, the analog of the Pauli equation for spin-1/2 particle is obtained for such probability distributions instead of the usual wave functions. That allows a classical-like approach to quantum mechanics. Some illuminating examples are presented.Comment: 14 pages, ReVTe

Legal and biological safety of legal reprocessing of medicalhospital materials

Introduction: Procedures using disposable materials in thehealth area began to be performed, for example in cardiaccatheterization, which has a high prevalence of morbidity andmortality. Objective: To justify and reaffirm the reuse of single-use catheters in surgeries, as it is justified by the economicbenefit gained from replacing the purchase of new materialsby reusing them. Materials and methods: A bibliographic anddocumentary narrative review was carried out using LILACSand NCBI as database, with previously defined filters andselection criteria. Resultados: Decontamination, disinfection,conditioning, sterilization, and quality control tests are criticalstages and, therefore, require training. Each of these stages alsohas characteristic risks, which must be minimized. In order toensure the quality of the catheter reuse process, after the cleaningand sterilization process, techniques beyond microscopicand visual evaluation of the device are required. A diversityof techniques is addressed so that the quality of the process isassured. Although legislation and supervision are divergentaround the world, many countries choose to adopt reprocessingwith economic justification in most cases. The reuse ofhospital devices involves several physico-chemical processes,which must be performed with quality and safety. Conclusion:The need for greater rigor in the norms and guidelines thataddress this practice is clear and urgent, as well as the greaterintensity and rigidity of the responsible inspection agencies.The use of luminol as an indicator of organic contaminantsmay generate a false positive result. Therefore, 3M™ Clean-Trace ™ is the best instrument found in the world market toensure that the material that has been reused is free of organicwaste, and thus fit for use in hospitals

Linguistic prejudice and discrimination in Brazilian Portuguese and beyond : suggestions and recommendations

In this article we make a distinction between the prejudice and discrimination towards (a) different languages and their speakers and (b) different non-standard varieties of the same language and their speakers, and argue that while the discrimination and prejudice towards (a) have been denounced by international institutions and both national and international laws are in place to guarantee the rights of speakers of different languages, the same protection has not been afforded to speakers of non-standard varieties of a language. We examine a specific case of this type of linguistic prejudice in Brazil. We discuss the effectiveness of efforts of linguists to combat linguistic prejudice based on the principle of error correction (Labov 1982) and, drawing on work by Cameron (2012) and Bourdieu (1986), suggest that linguistic prejudice cannot be disentangled from other types of prejudice and that linguists need to have a much deeper understanding of and engagement with the values attached to linguistic forms. We conclude with a number of suggestions and recommendations in order to effectively combat linguistic prejudice

Global delivery models: the role of talent, speed and time zones in the global outsourcing industry

Global delivery models (GDMs) are transforming the global IT and business process outsourcing industry. GDMs are a new form of client-specific investment promoting service integration with clients by combining client proximity with time-zone spread for 24/7 service operations. We investigate antecedents and contingencies of setting up GDM structures. Based on comprehensive data we show that providers are likely to establish GDM location configurations when clients value access to globally distributed talent and speed of service delivery, in particular when services are highly commoditized. Findings imply that coordination across time zones increasingly affects international operations in business-to-business and born-global industries

Photosynthesis

Although there has been considerable progress toward an understanding of the processes of photosyntehsis in recent years, the advances have been followed rather lcosely by symposia, monographs and reviews of the subject matter, particularly during the last three years. In view of the comprehensive coverage it would appear that the present review might very well be limited to a discussion of certain subjects of special interest to the authors and some with which they are especially familiar. These are (1) the extensive discussion by Warburg and his co-workers of their proposal for the existence of a light induced oxygen absorption (and corresponding carbon dioxide evolution) which can amount to three or four times the net oxygen evolution by the same light; and (2) the discovery of the early participation of 7 and 5 carbon sugars in carbon dioxide reduction in photosyntehsis together with some observations on the kinetics of the metabolic transformations. While it is true that a considerable number of significant publications have appears in other aspects of photosynthesis (the Hill reaction and its coupling with carbon dioxide reduction; photochemistry of chlorophyll and related synthetic materials as model reactions in relatively simple defined physical systems; transfer of light energy within the pigment systems) it is felt that they represent confirmation and extension of ideas which have already been discussed in a variety of earlier reviews and that a re-evaluation of them might very well be postponed until a later time

How hybrids manage growth and social–business tensions in global supply chains: the case of impact sourcing

This study contributes to the growing interest in how hybrid organizations manage paradoxical social–business tensions. Our empirical case is ‘‘impact sourcing’’— hybrids in global supply chains that hire staff from disadvantaged communities to provide services to business clients. We identify two major growth orientations— ‘‘community-focused’’ and ‘‘client-focused’’ growth—their inherent tensions and ways that hybrids manage them. The former favors slow growth and manages tensions through highly integrated client and community relations; the latter promotes faster growth and manages client and community relations separately. Both growth orientations address social–business tensions in particular ways, but also create latent constraints that manifest when entrepreneurial aspirations conflict with the current growth path. In presenting and discussing our findings, we introduce preempting management practices of tensions, and the importance of geographic embeddedness and distance to the paradox literature

Effects of Ciprofloxacin Alone or in Mixture with Sulfamethoxazole on the Efficiency of Anaerobic Digestion and Its Microbial Community

Some livestock farms rely on anaerobic digestion (AD) technology for manure disposal, thus obtaining energy (biogas) and fertilizer (digestate). Mixtures of antibiotics used for animal health often occur in organic waste and their possible synergistic/antagonistic effects on microorganisms involved in AD are still poorly studied. This work focuses on the effects of adding ciprofloxacin, alone (5 mg L−1) and in combination with sulfamethoxazole (2.5–5–10 mg L−1), on AD efficiency and microbial community structure. The experiment consisted of 90-day cattle manure batch tests and antibiotic removal percentages were assessed. Adding antibiotics always promoted CH4 and H2 production compared to untreated controls; however, CH4 production was lowered with the highest ciprofloxacin (CIP) concentrations. The overall results show antibiotic degradation caused by acidogenic Bacteria, and CH4 was mainly produced through the hydrogenotrophic-pathway by methanogenic Archaea. Shifts in microbial community abundance (DAPI counts) and composition (Illumina-MiSeq and FISH analyses) were observed