Objectives: Food supplements and medicines which are not on the list of prohibited substances of the World Anti-Doping Agency are included in the group of permitted pharmacological agents for athlete’s recovery. The aim of this study was to describe qualitatively and quantitatively food supplements (FS) and over-the-counter drugs use among athletes in the last six month. Methods: This was a cross sectional study. Data on food supplements and the over-the-counter drugs, usage were collected during 2018 by self-administered, anonymous questionnaire. Results: A total of 112 athletes completed the survey. A total of 51.8% (n = 58) athletes reported the use of food supplements. The use of medical supplements was reported by 50.0% (n = 56) of athletes, 26.8% (n = 30) reported using ergogenic supplements, 1.8% (n = 2) using of sports food and 4.5% (n = 5) using other supplements. The use of over-the-counter drugs was reported by 35.7% (n = 40) of athletes. The over-the-counter analgesic drugs were used by 95% (n = 38) of over-the-counter drug users. Concomitant administration two or more over-the-counter drugs was reported by 40% (n = 16) athletes. Doctors and coaches had no advisory role in the use of food supplements or over-the-counter drugs.

This work is motivated by growing evidence that the standard Cyclic Prefix (CP) length, adopted in the Long Term Evolution (LTE) physical layer (PHY) specifications, is oversized in propagation environments ranging from indoor to typical urban. Although this ostensibly seems to be addressed by 5G New Radio (NR) numerology, its scalable CP length reduction is proportionally tracked by the OFDM symbol length, which preserves the relative CP overhead of LTE. Furthermore, some simple means to optimize fixed or introduce adaptive CP length arose from either simulations or models taking into account only the bit-oriented PHY transmission performance. On the contrary, in the novel crosslayer analytical model proposed here, the closed-form expression for the optimal CP length is derived such as to minimize the effective average codeblock length, by also considering the error recovery retransmissions through the layers above PHY—the Medium Access Control (MAC) and the Radio Link Control (RLC), in particular. It turns out that, for given protective coding, the optimal CP length is determined by the appropriate rms delay spread of the channel power delay profile part remaining outside the CP span. The optimal CP length values are found to be significantly lower than the corresponding industry-standard ones, which unveils the potential for improving the net throughput.

Metal injection molding technology is commonly used in production of small and very complex parts. Residual porosity is unavoidable characteristic of P/M parts, affecting their final properties. During injection molding phase powder-binder separation can occur, causing green density variation through cross section of the part. This behaviour is particularly pronounced as complexity of the parts increases. As a consequence, zones with different density and residual porosity can be seen after sintering. In this regard, porosity and hardness distribution of the sintered ring-shaped part is analysed and presented in the paper.

This study aims to improve the understanding of perceived managerial decency by developing an initial set of items for its measurement scale. Based on the social exchange theory and driven by the strong need for instilling more decency and civility in managerial discourse, this study makes a comprehensive overview of the scope and domain of perceived managerial decency and extracts the potential decency dimensions. After conducting a literature review, 50 collected interview responses on typical examples of managerial decency, as perceived by employees, served as a basis for further analysis. Using the content analysis tools, we generated a set of initial items and dimensions of decency. Those were further refined by 21 experts (5 from academia and 16 from the target audience) using the means of qualitative and quantitative assessment. as a result, we define the perceived managerial decency construct and outline its six potential dimensions: (1) respectful interactions, (2) treatment with good manners, (3) employee development, (4) mutual trust, (5) decent feedback, and (6) providing insight into a bigger picture, as well as generate a set of 75 valid items that reflect the decency construct. We further discuss the research implications for theory and practice.

The contemporary business environment, characterized by high levels of dynamism, turbulence, and uncertainty, has forced companies to re-evaluate traditional models of commerce and make a shift towards Internet-based e-commerce models. Since the perception of usefulness determines the firm’s willingness to adopt e-commerce, this study strives to explore the contributing factors among SMEs in Bosnia and Herzegovina. A survey of 154 SME managers/owners was conducted, to identify variables that are key drivers of perceived usefulness. The findings revealed that the strategic management benefits, compatibility, and external pressures are the key predictors of perceived usefulness. This study also shows that the perceived usefulness of e-commerce is higher, if companies belonging to the same industry, or the same business network, have already adopted this business model. These findings strengthen the idea of the enterprise bandwagon effect. Compared to the newer and younger firms, the results also indicate that mature firms tend to have higher perceived usefulness of e-commerce.

<p style="text-align: justify;">Microstructure of an austenitic stainless steels is primarily monophasic, i.e. austenitic. However, the chemical composition of steel can affect on precipitation of a delta ferrite. The presence of the delta ferrite in austenitic stainless steel has a beneficial or detrimental effect on mechanical properties (impact and tensile) as well as on weldability and corrosion resistance. This paper presents some methods of determining the content of delta ferrite in austenitic stainless steels as well as in weld metal.</p>

In this paper, the polyphenol content and antioxidant activity of fig leaf extracts were analyzed. Extraction was performed with methanol, ethanol, acetone and their aqueous mixtures (50:50 v/v). Extractions were performed with stirring at 300 rpm on a vibromix and ultrasonic bath for 15 minutes. The polyphenol content was determined spectrophotometrically using the Folin-Ciocalteu test. Antioxidant capacity was tested using the FRAP and DPPH methods. The results showed a significant effect of extraction of bioactive components using an organic solvent:water mixture in relation to the organic solvent itself. Ultrasonic extraction proved to be a more efficient technique compared to mixing at 300 rpm.  

This paper presents a fuzzy system for reliability-based power distribution network planning. The proposed Mamdani type fuzzy inference system with subsequent application of the Bellman-Zadeh decision-making method is used to evaluate the reliability of the power line feeders as criteria for power system planning. Unplanned outages of system components, the Energy Not Supplied (ENS) and age of the power lines are used as input variables of the system and are fuzzified using triangular fuzzy functions. The proposed model was tested on a model of a realistic distribution network in order to prove its relevance and applicability. Results demonstrated that this model could make a contribution in this field as it can be used in practical planning situations for project priority ranking.

Cleft of the mitral valve is a rare cause of the congenital mitral regurgitation. Isolated cleft is uncommon finding and is more often found associated with some form of endocardial cushion defect. Cleft of the septal leaflet is found much more often than the defect in the posterior leaflet. Mitral clefts can extend to the mitral annulus or they can be less ''deep'' and show only minor regurgitation. Clinical importance of the isolated cleft of the mitral valve (ICMV) is that it can be successfully corrected by surgery and that it can have good long-term results.

Takayasu arteritis (TA) is a challenging chronic inflammatory vasculitis of large vessels with unknown etiology. It usually affects the aorta and its main branches and in few cases it affects other arteries like pulmonary and coronary. We report a case of a young woman with transient ischemic attack (TIA) as the initial presentation followed later by ischemic limb syndrome and then ischemic stroke. Lack of specific diagnostic biomarkers for this disease makes early diagnosis and treatment challenging.