University of Ioannina

About: University of Ioannina is a education organization based out in Ioannina, Greece. It is known for research contribution in the topics: Population & Large Hadron Collider. The organization has 7654 authors who have published 20594 publications receiving 671560 citations. The organization is also known as: Panepistimio Ioanninon.

Organic product avoidance: Reasons for rejection and potential buyers’ identification in a countrywide survey

Abstract: The present study attempts to offer more insights into the Greek organic market. It examines the organic products as “eco‐products”, suitable for “green” consumers, conscious in matters of ecology‐environment, who follow a wider health and quality‐sensitive stance of life. Analyzing a countrywide sample, the survey concludes that three consumer types exist in terms of attitude towards, purchase intention and awareness of organic products: the “unaware”, the “aware non‐users”, and the “aware users” (or simply users) of organic food products. After developing a detailed profile of the other two, the “aware non‐users” type is segmented in terms of five groups of personality and behavioral factors defined in the international literature as the driving forces of organic purchase. Then, organic products’ rejection reasons and potential organic buyer segments are revealed and their profile is fully described.

Quantum calculus on finite intervals and applications to impulsive difference equations

Abstract: In this paper we initiate the study of quantum calculus on finite intervals. We define the qk-derivative and qk-integral of a function and prove their basic properties. As an application, we prove existence and uniqueness results for initial value problems for first- and second-order impulsive qk-difference equations. MSC: 26A33; 39A13; 34A37

GetReal in network meta‐analysis: a review of the methodology

Abstract: Pairwise meta-analysis is an established statistical tool for synthesizing evidence from multiple trials, but it is informative only about the relative efficacy of two specific interventions. The usefulness of pairwise meta-analysis is thus limited in real-life medical practice, where many competing interventions may be available for a certain condition and studies informing some of the pairwise comparisons may be lacking. This commonly encountered scenario has led to the development of network meta-analysis (NMA). In the last decade, several applications, methodological developments, and empirical studies in NMA have been published, and the area is thriving as its relevance to public health is increasingly recognized. This article presents a review of the relevant literature on NMA methodology aiming to pinpoint the developments that have appeared in the field. Copyright © 2016 John Wiley & Sons, Ltd.

Search for supersymmetry in hadronic final states with missing transverse energy using the variables αT and b-quark multiplicity in pp collisions at √s = 8 TeV

Abstract: An inclusive search for supersymmetric processes that produce final states with jets and missing transverse energy is performed in pp collisions at a centre-of-mass energy of 8 TeV. The data sample corresponds to an integrated luminosity of 11.7 fb−1 collected by the CMS experiment at the LHC. In this search, a dimensionless kinematic variable, α T, is used to discriminate between events with genuine and misreconstructed missing transverse energy. The search is based on an examination of the number of reconstructed jets per event, the scalar sum of transverse energies of these jets, and the number of these jets identified as originating from bottom quarks. No significant excess of events over the standard model expectation is found. Exclusion limits are set in the parameter space of simplified models, with a special emphasis on both compressed-spectrum scenarios and direct or gluino-induced production of third-generation squarks. For the case of gluino-mediated squark production, gluino masses up to 950–1125 GeV are excluded depending on the assumed model. For the direct pair-production of squarks, masses up to 450 GeV are excluded for a single light first- or second-generation squark, increasing to 600 GeV for bottom squarks.

Role of the Fcgamma receptor IIa polymorphism in susceptibility to systemic lupus erythematosus and lupus nephritis: a meta-analysis.

Abstract: Objective To assess the impact of the Fcγ receptor type IIa (FcγRIIa)–R/H131 polymorphism on the risk for systemic lupus erythematosus (SLE) and development of lupus nephritis. Methods A meta-analysis was performed based on the Medline and Embase databases (last retrieval August 2001), assessment of bibliographies of pertinent articles, and additional data gathered after contact with primary investigators. Results A total of 25 comparisons from 17 studies involving R/H131 genotyping of 1,405 patients with lupus nephritis, 1,709 SLE patients without nephritis, and 2,580 non-SLE controls were included. No association between RR genotype and risk of lupus nephritis relative to both other genotypes (odds ratio [OR] 1.05, 95% confidence interval [95% CI] 0.88–1.27) was demonstrated in the total meta-analysis or in any racial subgroup. The RR genotype was more frequent in SLE patients as a whole (OR 1.30, 95% CI 1.10–1.52) and in SLE patients without nephritis (OR 1.27, 95% CI 1.04–1.55) compared with disease-free controls. A potential dose–response relation between the R131 allele and the risk of SLE was also identified, with an OR of 1.23 for RR versus RH (95% CI 1.03–1.46). The OR was 1.55 for RR versus HH (95% CI 1.21–1.98). There was no significant heterogeneity between racial subgroups. The population-attributable fractions of SLE cases due to the FcγRIIa-R131 allele were 13%, 40%, and 24% in subjects of European, African, and Asian descent, respectively. Conclusion The FcγRIIa-R/H131 polymorphism represents a significant risk factor for SLE but has no clear effect on susceptibility for lupus nephritis.