A vertex-varying spectral content on graphs challenges the assumption of vertex invariance and requires vertex-frequency representations for an adequate analysis. In this letter, we introduce a class of vertex-frequency energy distributions inspired by traditional time-frequency energy distributions. These newly introduced distributions do not use localization windows. Their efficiency in energy concentration is illustrated through examples.

Introduction: Quality of life in patients with acute pharyngitis or tonsillitis is significantly lower than in healthy persons, and it should be taken into account when efficacy of new therapeutic options is investigated. Objective: The aim of this study was to develop and validate a reliable instrument that can measure quality of life in adult outpatients with sore throat caused by acute pharyngitis or acute tonsillitis. Method: The study was of a cross-sectional type, and assessed reliability and validity of newly developed questionnaire for measurement of quality of life in adult outpatients with sore throat (STQoL) caused by acute pharyngitis or acute tonsillitis. It was conducted on a sample of 282 patients, with mean age 39.0 ± 14.8 years, male/female ratio 104/178 (36.9%/63.1%). Results: Final version of the STQoL scale with 21 items showed excellent reliability, with Cronbach’s alpha 0.949. It was temporally stable, and both divergent and convergent validity tests had good results. Factorial analysis revealed three domains, Social/psychic aspects, Physical aspects and Environmental aspects of sore throat related quality of life. Conclusions: The STQoL scale is reliable and valid specific instrument for measuring sore throat related quality of life, which is an important treatment outcome in patients with acute pharyngitis or tonsillitis.

Summary Diabetes mellitus is one of the most common chronic diseases which continue to increase in number and significance. It presents the third most prevalent condition among medically compromised patients referring for dental treatment. Diabetes mellitus has been defined as a group of metabolic diseases characterized by hyperglycemia resulting from defects in insulin secretion, insulin action, or both. Hyperglycemia leads to widespread multisystem damage which has an effect on oral tissue. The present article summarizes current knowledge regarding the association between diabetes mellitus and oral and dental health.

Abstract Background: Many studies have considered knowledge as the most important strategic resource for ensuring firm’s competitiveness. Accordingly, learning is an important concept for firms whether it is individual or organizational learning. Objectives: To provide empirical support to the impact of individual organizational learning dimensions on a firm’s knowledge management. Methods/Approach: The questionnaire survey approach is used for data collection and structural equation modeling for hypotheses testing. Besides, PROCESS procedure is employed to estimate confidence intervals of indirect effects in the model. Results: Organizational learning dimensions are antecedents of knowledge management capability. Shared values and openness influence directly and positively knowledge management capability. However, the same was not found to be the case for managerial commitment and dialogue. On the other hand, the results suggest that managerial commitment and dialog influence knowledge management capability indirectly over shared vision. Conclusions: While there has been an underlying assumption about the role of organizational learning for knowledge management, this study provides evidence on how organizational learning dimensions such as management commitment, shared vision, openness and experimentation, and dialog may be adjusted to facilitate and enhance knowledge management processes.