Item selection by Latent Class-based methods

The evaluation of nursing homes is usually based on the administration of questionnaires made of a large number of polytomous items. In such a context, the Latent Class (LC) model represents a useful tool for clustering subjects in homogenous groups corresponding to different degrees of impairment of the health conditions. It is known that the performance of model-based clustering and the accuracy of the choice of the number of latent classes may be affected by the presence of irrelevant or noise variables. In this paper, we show the application of an item selection algorithm to real data collected within a project, named ULISSE, on the quality-of-life of elderly patients hosted in italian nursing homes. This algorithm, which is closely related to that proposed by Dean and Raftery in 2010, is aimed at finding the subset of items which provides the best clustering according to the Bayesian Information Criterion. At the same time, it allows us to select the optimal number of latent classes. Given the complexity of the ULISSE study, we perform a validation of the results by means of a sensitivity analysis to different specifications of the initial subset of items and of a resampling procedure

Influence of extraction methods on the composition of essential oils of Achillea millefolium L. from Lithuania

In this study, flowering aerial parts of Achillea millefolium were used as a matrix for supercritical CO2 extraction (SFE) of volatile oil. The collected extracts were analyzed by GC-FID and GC-MS methods and their composition were compared with that of the essential oil isolated by hydrodistillation (HD). The composition of the essential oil obtained by hydrodistillation and SFE methods is widely different. Indeed, the SFE volatile oil had a pale yellow color whereas the HD oil had a blue color due to the presence of chamazulene (48.0% vs. 4.3%). Other important constituents of HD oil were (E)- caryophyllene (19.5 %) and γ-muurolene (13.1%). The CO2 supercritical extract was dominated by (E)-caryophyllene (26.0%), γ-muurolene (22.0%), and caryophyllene oxide (8.1%)

Using stakeholder dialogue as a source for new ideas. A dynamic capability underlying sustainable innovation

This paper attempts to gain a deeper understanding of the firm's ability for integrating stakeholder insights into the process of organisational innovation within the context of sustainable development. Given the early stage of empirical research on the topic, we used an exploratory case study method of two Spanish companies that have successfully learned from stakeholder dialogue and have generated innovations that are both beneficial for the company and for sustainable development in general. The evidence from the two case studies suggests the existence of two simple capabilities - stakeholder dialogue and stakeholder knowledge integration - for generating innovations in accordance with stakeholder needs. Whereas stakeholder dialogue leverages organisational resources that promote two-way communication, transparency and appropriate feedback to stakeholders, stakeholder knowledge integration relies on non-hierarchical structures, flexibility and openness to change. The paper sheds some light on the under-researched issue of linking stakeholder dialogue and sustainable innovation, and contributes to opening the 'black box' of dynamic capabilities and advancing in the understanding of this fundamental organisational concept.sustainable development; stakeholders; innovation; capabilities;

Parent\u2019s perception of children\u2019s fear: from FSSC-IT to FSSC-PP

Studies involving parents' reports about children's fears and multiple informant comparisons are less extended than investigations on children's self-reporting fear schedules. Starting with the Italian version of FSSC-R, the FSSC-IT, the main aims of this study were to adapt a schedule for parents' perception of their children's fear: the FSSC-Parent Perception. Its psychometric properties were examined in a large sample of parents (N = 2970) of children aged 8-10 years. Exploratory and confirmatory factorial structures were examined and compared with the Italian children's ones. Mother vs. father, children's gender and school age group effects were analyzed. The confirmatory factor analysis confirmed a four correlated factors solution model (Fear of Danger and Death; Fear of Injury and Animals; Fear of Failure and Criticism; Fear of the unknown and Phobic aspects). Some effects related to child gender, age group, mother vs. father, were found. The FSSC-PP properties supported its use by parents to assess their children's fears. A qualitative analysis of the top 10 fears most endorsed by parents will be presented and compared with children's fears. Clinical implications about the quality of parent-child relationships where discussed, comparing mothers and fathers, and parents' perception about daughters' and sons' most endorsed fears

UK’s Ratification of the CISG – An Old Debate or a New Hope for the Economy of the UK on Its Way Out of the Recession: The Potential Impact of the CISG on the UK’s SME

The main hypothesis of this article is that the Vienna Convention on the International Sale of Goods has the potential to act as a catalyst for the economy of the UK on its way out of the recession and, therefore, should be ratified, as it will strongly affect the development of the SME sector. This hypothesis will be questioned and evaluated throughout the article. In Part II of the article, the importance of the SMEs for the current economy of the UK will be assessed. Together with Part I, Part II will form the prism through which the remainder of the article will be viewed. Parts III and onwards will analyze the hypothesis stated earlier in the Introduction. They will ask the questions: (1) Would the ratification of the CISG be beneficial for the UK SMEs? and (2) Would the ratification of the CISG be beneficial for the economy of the UK

Self-Reflection, Politics, Art, and Qualitative Research: A Review of Denzin and Lincoln’s Third Edition of Collecting and Interpreting Qualitative Materials

The third edition of Collecting and Interpreting Qualitative Materials, edited by Norman K. Denzin and Yvonna S. Lincoln, illustrates the varied perspectives of twenty five experienced qualitative researchers focusing on collecting, analyzing, and interpreting empirical materials. New topics are introduced in this third edition capturing the dynamic nature and emerging trends in the field such as arts-based approaches. It is a great reference book and a resource of unlimited possibilities. It provides a window for further inquiry for beginners, intermediate and experienced qualitative researchers. Many of the chapters read as powerful essays provoking self-reflection, political involvement, activism, and alternate ways of looking at the world around us

Blueprint for fault-tolerant quantum computation with Rydberg atoms

We present a blueprint for building a fault-tolerant universal quantum computer with Rydberg atoms. Our scheme, which is based on the surface code, uses individually addressable, optically trapped atoms as qubits and exploits electromagnetically induced transparency to perform the multiqubit gates required for error correction and computation. We discuss the advantages and challenges of using Rydberg atoms to build such a quantum computer, and we perform error correction simulations to obtain an error threshold for our scheme. Our findings suggest that Rydberg atoms are a promising candidate for quantum computation, but gate fidelities need to improve before fault-tolerant universal quantum computation can be achieved