This paper aims to analyze the statistical parameters and to determine the differences between the water polo tournament in Sisak and the water polo tournament in Sarajevo. Situational efficiency utilizing certain variables shows us the most important parts of the game during a water polo match. Statistics is a scientific discipline that studies the methods of collecting, collating, analyzing, and interpreting data. The sample consists of 336 water polo players, from six clubs of two age categories from the league of Canton Sarajevo and six clubs of two age categories from the Sisak International Tournament, in the "junior and cadet" categories for men born in 2003 and 2004, 2005. The sample of variables consists of 9 tests to assess situational efficiency in a water polo game that defines the main characteristics of a water polo match. The following will explain the observed variables: goals scored, attempt to score, goal from action, center to score, anchor to score, penalty, attempt from penalty defended by the goalkeeper or player missed, foul on the counter-attack, sprint - counter with a goal scored. The results of the H square test show that there are statistically significant differences (p .000) in the analyzed segments of the water polo match. It can be concluded that the teams in the tournament in Sisak are better organized because in every aspect they have achieved better results in comparison to the Sarajevo tournament. The teams from Sisak were better and faster swimming because a lot of goals were scored by counter-attack, more attempts to shoot at goal (Sisak), fewer penalties, which means that in Sarajevo is rough play and greater success of winning teams in penalties.

Purpose of the study: The purpose of this paper is to analyze the potential causal link between innovation, entrepreneurship activity, and economic growth in the case of nine developed countries over the time-span ranging between 2001 and 2014. The research goal is to examine if the findings of this paper support the endogenous growth theory. Methodology: This paper has initially explored the stationary properties of the variables. Moreover, the causal links between the variables of interest have been investigated by estimating the panel VAR model (trivariate) employing the GMM framework. This paper also examines the potential causal linkage amid the variables of interest by employing the Granger causality test. Main Findings: Empirical results suggest that economic growth is found to Granger cause innovation and entrepreneurship activity. These findings emphasize the necessity to take both innovation and entrepreneurship while analyzing the determinants of economic growth since these are found to be interconnected and may play a critical role in the growth of the economy. These findings also support the endogenous growth. Applications of this study: Outcome of this paper is expected to provide significant insights for decision-makers to make a necessary effort not only to increase the start-up rates in developed countries but also to reduce the informal sector that is likely to occur as a result of start-ups in developing countries jeopardizing developed countries’ competitiveness. Novelty/Originality of this study: The first contribution of this study to the literature is the examination of cross-sectional dynamics of developed countries’ innovation, entrepreneurship, and economic growth. Secondly, these results indicate that entrepreneurial activity is a proximate cause and should be modelled as the channel through which innovation contributes to economic growth. Thirdly, the data used in this study are more comprehensive.

Deliberate unaccountability (insanity) is an institute known in legal theory as Actiones liberae in causa. Its significance lies it is an exception to the general rules for determining accountability and guilt. The exception is to regulate the guilt of persons who arbitrarily bring themselves into a state of temporary mental disorder and commit a crime in such a state. The central theme of the paper is the definition and legal regulation of actiones liberae in causa in Serbian criminal law, its demarcation from non-accounting and substantially reduced accounting as well as its application in practice.

Anterior cervical discectomy and fusion (ACDF) is one of the most common spinal procedures, frequently used for the treatment of cervical spine degenerative diseases. It was first described in 1958. Interestingly, to our knowledge, 3-level ACDF has not been previously published as a peer-reviewed video case with a detailed description of intraoperative microsurgical anatomy. In this video, we present the case of a 33-year-old male who presented with a combination of myelopathy (hyperreflexia and long tract signs in the upper and lower extremities) and bilateral radiculopathy of the upper extremities. He had been previously treated conservatively with physical therapy and pain management for 6 months without success. We performed 3-level microsurgical ACDF from C4 to C7. All 3 levels were decompressed, and bone allografts were placed to achieve intervertebral body fusion. A titanium plate was utilized from C4 to C7 for internal fixation. The patient was discharged home on the first postoperative day. His pain, numbness and tingling resolved, as well as his myelopathy. No perioperative complications were encountered. Herein we present the surgical anatomy of our operative technique including certain technical tips. Written consent was obtained directly from the patient.

Austempered ductile iron (ADI) belongs to the heat-treated class of ductile iron. The heat treatment consists of austenitization and the tempering process. The microstructure of an ADI sample is ausferrite consisting of acicular ferrite, carbon-saturated austenite and a graphite phase in the shape of nodules. The corrosion properties of ADI samples depend on the microstructure constituents and stability of the microstructure. In this paper, the influence of ausferrite microstructure decomposition on the corrosion properties of the ADI samples are presented. During the research, Tafel curve extrapolation and potentiodynamic polarization were used. It was found that the ausferrite microstructure decomposition very strongly affected the general corrosion behavior of the ADI samples.

Regardless of the context to which it is applied, sharing resources is well-recognized for its considerable benefits. Since 5G networks will be service-oriented, on-demand, and highly heterogeneous, it is utmost important to approach the design and optimization of the network from an end-to-end perspective. In addition, in order to ensure end-to-end performance, this approach has to entail both wireless and optical domains, altogether with the IoT, edge, and cloud paradigms which are an indispensable part of the 5G network architecture. Shifting from the exclusive ownership of network resources toward sharing enables all participants to cope with stringent service requirements in 5G networks, gaining significant performance improvements and cost savings at the same time. The main objective of this paper is to survey the literature on resource sharing, providing an in-depth and comprehensive perspective of sharing by recognizing the main trends, the techniques which enable sharing, and the challenges that need to be addressed. By providing a taxonomy which brings the relevant features of a comprehensive sharing model into focus, we aim to enable the creation of sharing models for more efficient future communication networks. We also summarize and discuss the relevant issues arising from network sharing, that should be properly tackled in the future.

Background: To investigate the total survival of low birth weight infants (LBWIs) in the Federation of Bosnia and Herzegovina (FB and H) and selected by subgroups of birth weight (BW) and gestational age (GA). Methods: This cross-sectional study included newborns of both genders, GA of 22–42 weeks and BW of less than 2500 g of 10 cantons territory of the FB and H. In the examined period, 22,897 children were born in the FB and H, of which 669 (2.9%) had BW less than 2500 g. Results: Surviving of LBWIs in the FB and H out of the 669 LBWIs in the first level perinatal healthcare institutions (PHI) was 29 (4.3%), the second level was 286 (42.8%), and the third level was 354 (52.9%). The total stillborn rate was 3.9%. The overall perinatal mortality rate for all levels of PHI was 8.6%. The overall rate of early neonatal mortality of LBWIs in all three levels of PHI in the FB and H was 12.7%. By the end of the first month of life (up to 28 days) and to the end of the neonatal period, 385 (57.5%) of LBWIs survived, and 284 (42.4%) died. The LBWIs by subgroups of BW up to 28 days had lower survival rates in second-level PHI than infants of the same BW subgroups (500–999 and 1000–1499) treated in third-level PHI (P = 0.0089 and P = 0.004). Conclusions: Our results show that B and H belongs to developing countries according to perinatal mortality. A unique database system is necessary to follow progress and trends.

Whole Genome Sequence of four samples from COVID-19 outbreaks was done in two laboratories in Bosnia and Herzegovina (Veterinary Faculty Sarajevo and Alea Genetic Center). All four BiH sequences cluster mainly with European ones (Italy, Austria, France, Sweden, Cyprus, England). The constructed phylogenetic tree indicates probable multiple independent introduction events. The success of future containment measures concernig new introductions will be highly challenging for country due to the significant proportion of BH population living abroad.

Geometry is a very interesting, applicable and beautiful part of mathematics. However, geometry is often difficult for students to understand and demanding for teachers to teach [1]. Constructing proofs in geometric problems turns out to be particularly difficult, even for high attaining students [2]. Sometimes, students do not even know where to start when trying to solve these [3].

A simple polygon that either has equal all sides or all interior angles is called a semi-regular nonagon. In terms of this definition, we can distinguish between two types of semi-regular polygons: equilateral polygons (that have equal all sides and different interior angles) and equiangular polygons (that have equal interior angles and different sides). Unlike regular polygons, one characteristic element is not enough to analyze the metric properties of semi-regular polygons, and an additional one is needed. To select this additional characteristic element, note that the following regular triangles can be inscribed to a semi-regular equilateral nonagon by joining vertices: ∆A1 A4A7, △ A2 A5 A8, △A3 A6 A9. Now have a look at triangle △A1 A4A7. Let us use the mark φ=∡(a,b1) to mark the angle between side a of the semi-regular nonagon and side b1 of the inscribed regular triangle. In interpreting the metric properties of a semi-regular equilateral nonagon, in addition to its side, we also use the angle that such side creates with the side of one of the three regular triangles that can be inscribed to such semi-regular nonagon. We consider the way in which convexity, possibility of construction, surface area, and other properties depend on a side of the semi-regular nonagon and angle φ=∡(a,b1).

A simple polygon that either has equal all sides or all interior angles is called a semi-regular polygon. In terms of this definition, we can distinguish between two types of semi-regular polygons: equilateral polygons (that have equal all sides and different interior angles) and equiangular polygons (that have equal interior angles and different sides). To analyze the metric properties of semi-regular polygons, knowing only one basic element, e.g. the length of a side, as in regular polygons, is not enough. Therefore, in addition to the side of a semi-regular polygon, we use another characteristic element of it to analyze the metric features, and that is the angle δ=∠(a,b) between the side of a semi-regular polygon PN and the side b of its inscribed regular polygon PN. Some metric properties of a semi-regular equilateral 2n-sides polygon are analyzed in this paper with respect to these two characteristic elements. Some of the problems discussed in the paper are: convexity, calculation of surface area, dependence on the length of sides a and δ, calculation of the radius of the inscribed circle depending on the sides a and angles δ, and calculation of the surface area in which the radius of the inscribed circle is known, as well as the relationship between them. It has been shown that the formula for calculating the surface area of regular polygons results from the formula for the surface area of 2n-side semi-regular, equilateral polygons. Further, by using these results, it has been shown that the cross-sections of regular polygons inscribed to semi-regular equilateral polygons, the vertices of equiangular semi-regular polygons, as well as the sides of the regular polygons inscribed to it, intersect in the same manner at the vertices of the equilateral semi-regular polygon. It has further been shown that the sides of the equiangular semi-regular polygon refer to each other as the sines of the angles created by the sides of the inscribed polygons and the side of the semi-regular polygon.

Recently, Leung et al. [1] proposed that α7-subtype nicotinic acetylcholine receptor (α7-nAChR) antagonists might decrease angiotensin-converting enzyme (ACE)2 receptor expression in respiratory epithelium and, hence, prevent severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) invasion of pulmonary epithelial cells. Let us further theoretically evaluate this assertion and contribute to the quest for potential medications that might reduce virulence and pathogenicity of coronavirus disease 2019 (COVID-19). Smoking may be associated with progression and negative outcome of COVID-19 [1]. The receptor-binding domain of the S protein (spike) on the surface of SARS-CoV-2 interacts with the ACE2 receptor, which is an entry point of the virus into host respiratory cells [2]. Memantine, as an antagonist of α7-nAChR and NMDA receptors, may decrease ACE2 receptor expression and reduce oxidative stress and inflammation. Hence, memantine may potentially reduce SARS-CoV-2 virulence. https://bit.ly/2AZHiVg