—We consider the improvement of dynamic security in power systems by tuning of the power plant controllers. The parameters of existing controllers are tuned like power system stabilizers in order to increase the stability reserve and oscillation damping after a dropout of power plants and power lines. The tuning is done in two steps: in the first step, the power system is stabilized after the dropout of a power plant or power line. Then, oscillation damping is increased after the dropout by an H-infinity optimization approach. Both steps use linear matrix inequality optimization methods. To perform the tuning, we introduce a modeling method for the dropout of power plants and power lines, such that the dropout of components can be considered directly as a disturbance input for the H-infinity optimization. Finally, we evaluate the approach on the IEEE 39 bus model. We show that the presented methods successfully stabilize the system and improve power oscillation damping after the dropout of different power plants and power lines.

The aim of this paper is to summarize a large number of economic and demographic determinants that are used to predict the demand for life insurance into a smaller number of component variables (components) and to determine which component has a stronger influence on demand for life insurance. Data are collected for 150 countries during the period 2005-2010. Final cross-country database is consisted of six-year average values on variables for selected countries. The methodology includes techniques of multivariate analysis: principal component analysis (PCA) and multiple linear regression. Results show that initial determinants of demand for life insurance can be summarized into two components: economic and demographic. Both components have a statistically significant positive influence on the demand for life insurance. On the basis of standardized regression coefficients it can be concluded that economic component is stronger determinant of demand for life insurance in comparison with demographic.

<p style="text-align: justify;">Higher level of finalization of new product and production of furniture presents the challenge for all manufacturers of wood. Production of massive wood furniture becomes dominant and presents extraordinary chance for wood product manufacturing industry in B&amp;H. Being introduced with the process capability of the certain company and certain processes, which preceded by built prototype-samples, is of crucial importance for successful agreement and further business cooperation with customers. The aim of this paper work is to determine the most influencing factors on the capability of technological process and to make ranking of criteria influencing on stability and to compare them with factors that have influence on the speed of new product development and to determine correlation between them.<br />Research, carried out in this work, gave the result on estimation of technological capability, done with the company management, including the research related to the speed and development of new product development looking at the same time characteristic spots for improvement of quality management. Results of this research will be the starting point for defining relations between technological capability and the speed of new product development and their relations will be examined throughout &chi;2 test which<br />will be confirmed throughout the contingency test and Spearman's rank correlation coefficient.</p>

Phthalates are ubiquitous in indoor environments, which raises concern about their endocrine-disrupting properties. However, studies of human uptake from airborne exposure are limited. We studied the inhalation uptake and dermal uptake by air-to-skin transfer with clean clothing as a barrier of two deuterium-labeled airborne phthalates: particle-phase D4-DEHP (di(2-ethylhexyl)phthalate) and gas-phase D4-DEP (diethyl phthalate). Sixteen participants, wearing trousers and long-sleeved shirts, were under controlled conditions exposed to airborne phthalates in four exposure scenarios: dermal uptake alone and combined inhalation + dermal uptake of both phthalates. The results showed an average uptake of D4-DEHP by inhalation of 0.0014 ± 0.00088 (μg kg-1 bw)/(μg m-3)/h. No dermal uptake of D4-DEHP was observed during the 3 h exposure with clean clothing. The deposited dose of D4-DEHP accounted for 26% of the total inhaled D4-DEHP mass. For D4-DEP, the average uptake by inhalation + dermal was 0.0067 ± 0.0045 and 0.00073 ± 0.00051 (μg kg-1 bw)/(μg m-3)/h for dermal uptake. Urinary excretion factors of metabolites after inhalation were estimated to 0.69 for D4-DEHP and 0.50 for D4-DEP. Under the described settings, the main uptake of both phthalates was through inhalation. The results demonstrate the differences in uptake of gas and particles and highlight the importance of considering the deposited dose in particle uptake studies.

Resistive switching (RS) is an interesting property shown by some materials systems that, especially during the last decade, has gained a lot of interest for the fabrication of electronic devices, with electronic nonvolatile memories being those that have received the most attention. The presence and quality of the RS phenomenon in a materials system can be studied using different prototype cells, performing different experiments, displaying different figures of merit, and developing different computational analyses. Therefore, the real usefulness and impact of the findings presented in each study for the RS technology will be also different. This manuscript describes the most recommendable methodologies for the fabrication, characterization, and simulation of RS devices, as well as the proper methods to display the data obtained. The idea is to help the scientific community to evaluate the real usefulness and impact of an RS study for the development of RS technology.

ABSTRACT Introduction: Helicobacter pylori infection results in chronic gastritis, peptic ulcer, or gastric cancer; therefore, eradication of this bacterium is essential. The strategy for developing effective vaccines against H. pylori entails immunization of mice with a combination of classical and recombinant H. pylori antigens, but this has proven to be onerous in all cases. Areas covered: We have reviewed literature databases in PubMed and Scopus using the key words H. pylori, vaccine, and vaccination and have conducted a systematic review of published clinical trials and animal model studies on vaccines against H. pylori and have tried to summarize why the vaccines are not effective or only partially effective. Expert commentary: This is the perfect time to review vaccine development against H. pylori as, after several failed attempts, promising results were reported by Zeng et al. in 2015. Successful vaccine development requires knowledge of both the immune mechanisms active during natural infection by H. pylori, owing to the complicated host response against the pathogen, and the factors that allow the persistence of bacteria, such as genetic diversity of H. pylori. Moreover, various clinical trials are needed to prove vaccine efficacy.