Most extremum-seeking control approaches focus solely on the problem of finding the extremum of some unknown, steady-state performance map. However, many industrial applications also have to deal with constraints on operating conditions due to, e.g., actuator limitations, limitations on design or tunable system parameters, or constraints on measurable signals. These constraints, which can be unknown a-priori, may conflict with the otherwise optimal operational condition, and should be taken into account in performance optimization. In this work, we propose a sampled-data extremum-seeking approach for optimization of constrained dynamical systems using barrier function methods, where both the objective function and the constraint function are available through measurement only. We show that, under the assumption that initialization does not violate constraints, the interconnection between a constrained dynamical system and optimization algorithms that employ barrier function methods is stable, the constraints are satisfied, and optimization is achieved. We illustrate the results by means of a numerical example.

Most emulation-based results in networked control systems rely on a bound on the maximal allowable transmission interval (MATI) under which stability is preserved. However, having only such a MATI condition can lead to conservative results, as large values of transmission intervals may only occur sporadically, while the typical transmission interval is much smaller. In this paper, we therefore propose, in addition to the existence of a MATI, to also impose a bound on the average allowable transmission interval, expressed in terms of a reverse average dwell-time (RADT) condition on the transmission intervals. We provide joint conditions on the RADT and the MATI such that stability of the NCS can still be guaranteed, which can, in addition, lead to significant higher values of the MATI itself. The strengths of these new results are illustrated on a numerical example, showing a 484% improvement of the MATI, while still guaranteeing stability.

We study a class of distributed optimization problems of minimizing the sum of potentially non-differentiable convex objective functions (without requiring strong convexity). A novel approach to the analysis of asynchronous distributed optimization is developed. An iterative algorithm based on dual decomposition and block coordinate ascent is implemented in an edge based manner. We extend available results in the literature by allowing multiple and potentially overlapping blocks to be updated at the same time with non-uniform probabilities assigned to different blocks. Sublinear convergence with probability one is proved for the algorithm under the aforementioned weak assumptions. A numerical example is provided to illustrate the effectiveness of the algorithm.

geopolitical the definitions. The concept of the book consists of seven chapters: Introduction , Model and Theory , Several Geopolitical Approaches in the Recent Past , Classical Geopolitical Assumptions , Classical Geopolitical Theories, Applications of the Model, Setting the Course for a Rejuvenated Geopolitics , and Annex: Classical Geopolitical Concepts / Theories , Notes and Index . Following an overview of the development of geopolitics, the book introduces us to the history of geopolitics, but also its directions and scholars along two lines. The first line would be an organic, reflected by German concern about scientific laws, which contributed to the survival of states in an increasingly volatile world, with his two scholars Friedrich Ratzel and Rudolf Kjellén. Another would be the geostrategic British and North American interest, through the depicted geographical position of states and regions as a condition of foreign action with Alfred Thayer Mahan, Halford Mackinder, and Nicholas Spykman as their standard bearers. After World War II, these classical directions were exposed to great influence by the alleged connection with General Karl Haushofer and his geopolitical school in Munich as well as the aggression of Adolf Hitler, both directions in promoting war and racism. The book is structured to follow three main goals: first, purpose; constructed classical geopolitical model, second, objective; by its construction it outlines the usefulness and legitimacy of classical geopolitics as an important model of international relations, third, access; listed three ways that will show the benefit of classical geopolitics. Phil Kelly separates the model from theory and its application. Theory and the model are different, first, the theory is part of the second, the model. It lists sixty theories in our geopolitical model. These theories can be used to interpret actions and policies in the field of international relations

Social distance has been the subject of numerous research papers; the issue of researching social distance toward Roma is especially important. There are several aims of our study. The basic goal of the research is to determine the existence and intensity of social distance towards Roma held by primary school students. The specific goal of the research is to determine the differences in the presence of social distance held by students who often interact with Roma children, as well as those who rarely interact with them. The research sample consisted of 152 participants (71 fourth-grade students and 81 eighth-grade students; 85 boys and 67 girls). The Bogardus’s Scale, modified for children, was used for researching the social distance. Furthermore, the research implied two focus groups for the qualitative data to be obtained. The results showed the existance of social distance toward Roma students. Furthermore, according to this data, the least desirable relationship was sitting in the same school bench with Roma children, whereas the most acceptable relationship was going to the same school with Roma. Moreover, it was established that students having more relationships with Roma had lower social distance toward them as well. Qualitative data analysis shows higher level of negative stereotypes and attitudes toward Roma. It is essential to combine quantitative and qualitative measures for the purpose of getting the unbiased description of social distance toward Roma.

Bottled water sector in B&H becomes more significant economically with media pressure and expectations. This paper aims to determine factors important for the consumers while choosing bottled water products and in that way try to, by comparing the results to the sectors abilities, determine sector’s ability to meet the consumer’s needs. Small research among (97) respondents was carried out, and the results indicate that the sector is unable to meet the needs of the customers, since the trade balance is negative and domestic market share low. Customer profile suggests almost only young consumers, which indicates that for the stronger results further research is needed.

SUMMARY Bone tissue banks are necessary for collection, production, testing, packaging, storage and delivery of bone transplants. Bone tissue bank is a link between the donor and the recipient by which the donation becomes a medium of health improvement for both the donor and the recipient. At the Department of Orthopedics, Mostar University Clinical Hospital, about 200 total hip replacements are performed per year. Most patients undergoing total hip replacement surgery (90%) have been diagnosed with osteoarthritis, and they are suitable donors, having in mind their age and comorbidities. In the same Department, around 50 procedures that require bone transplants are performed per year. A team of highly competent surgeons are working on an intensive process of adaptation oriented to quality improvement and intensification of the activity, both with the goal of meeting the standards of excellence in orthopedic surgery. The presence of a bone tissue bank has a favorable impact on the quality of health care owing to bone transplant availability, as well as on the scientific role of a highly specialized institution that examines the properties of bone tissue.

BackgroundPhysical and biological properties of dust particles might affect the availability and distribution of chemicals associated to indoor dust; however it has not been adequately examined. In this study, household dust from Shanghai was fractionated into five particle sizes and size distribution, morphology, surface area, organic matter, microorganisms, elemental composition, metals and organophosphorus flame retardants (OPFRs) compositions were characterized. Also, household dust samples from Stockholm that has previously been characterized were included in the analysis of OPFRs for comparison.ResultsThe respirable fraction had a yield of 3.3% in mass percentage, with a particle size of 2.22 ± 2.04 µm. As expected, both metals and OPFRs concentrations increased with decreased particle size. Al and Fe dominated (66–87%) followed by the concentrations of Zn (5–14%) and Ga (1.8–5%) of the sum of 16 metals in the dust. The concentrations of OPFRs in Shanghai dust ranged from 5.34 to 13.7 µg/g (median: 7.21 µg/g), compared to household dust from Stockholm that ranged from 16.0 to 28.3 µg/g (median: 26.6 µg/g). Tris(2-chloroisopropyl) phosphate (TCIPP) and tris(2-chloroethyl) phosphate (TCEP) dominated in Shanghai dust samples while tris(2-butoxyethyl) phosphate (TBOEP) dominated in dust from Stockholm homes.ConclusionThe results showed that mass percentage for each particle size fraction was not evenly distributed. Furthermore, the particle-bound microorganisms and OPFRs increased with decreased particle size, whereas metals had the highest concentrations at specific dust sizes. Therefore, it is essential to select the proper particle size in order to assess any specific human exposure study to indoor pollutants.

During smoking, meat products may get contaminated by polycyclic aromatic hydrocarbons (PAH), especially the ones that are smoked in traditional (uncontrolled) conditions. This study aims to evaluate the difference in PAH content in samples of traditional dry cured pork meat products, “Hercegovačka pečenica”, produced in (1) a traditional smokehouse and (2) in industrial chambers. The study revealed that the content of the four priority PAHs (PAH4) in samples produced in a traditional smoking manner highly exceeded (up to 10 times) the maximal limits set for PAHs (12 µg/kg). PAH4 in all samples subjected to industrial smoking procedures was below the limit of quantification. All samples had below-the-limit-of-quantification values for Benzo[a]pyrene. The surface layer of the samples produced in traditional conditions had the highest total content of PAH16. The inner parts of all samples, whether traditional or industrial, had significantly lower PAH16 concentration than the surface layer.

Malawi is midway through its current Malaria Strategic Plan 2017–2022, which aims to reduce malaria incidence and deaths by at least 50% by 2022. Malariometric data are available with health surveillance data housed in District Health Information Software 2 (DHIS2) and household survey data from two recent Malaria Indicator Surveys (MIS) and a Demographic and Health Survey (DHS). Strengths and weaknesses of the data were discussed during a consultative meeting in Lilongwe, Malawi in July 2019. The first 3 days included in-depth exploration and analysis of surveillance and survey data by 13 participants from the National Malaria Control Programme, district health offices, and partner organizations. Key indicators derived from both DHIS2 and MIS/DHS sources were analysed with three case studies, and presented to stakeholders on the fourth day of the meeting. Applications of the findings to programmatic decision-making and strategic plan evaluation were critiqued and discussed.

<p style="text-align: justify;">The main focus of this paper is to present the TQM practices of 593 companies in Bosnia and Herzegovina. In addition, our results confirm that there are statistically significant differences in TQM practices between firms in a highly competitive and less competitive environment, as well as between firms with and without ISO certificates. TQM practices do not differ between companies that belong to different groups that we constructed based on their age, location, export-orientation and the firm size. We contribute to the existing body of knowledge by identifying organizational contextual factors that might matter in designing more complex structural models.<br /><br /></p>