Knowledge building is a social process that is driven by the willingness of people to share their expertise and create new knowledge. Scientific Communities of Practice (CoPs) are communities of professors and researchers whose aim is to foster scientific knowledge generation. In the KM literature, research concerning this kind of CoPs has been substantially neglected so far. The present research analyses the case study of the International Association for Knowledge Management (IAKM) seen as a scientific CoP where members are mostly academics with research interests in developing and promoting knowledge management. Based on a collection of quantitative and qualitative data about member collaborations and scientific production, the study investigates the structure of interactions and the collaborative processes of IAKM members and the specific mechanisms of knowledge building within this CoP, seen as a paradigmatic example of scientific community. Members were asked to respond to a survey regarding their collaborative activities carried out with other IAKM members in the period of 2011 – 2020. The descriptive analysis revealed the kind of collaborations, the distribution of interactions across the community, and the dynamic patterns over time. A follow-up social network analysis was used to provide deeper insight into the community structure and dynamics. The research found that a CoP can really be useful for progress in a scientific field because it can provide a platform for trust and mutual acquaintance that reduces barriers to collaboration and knowledge building across different universities, professional roles, countries, and cultures, which is increasingly important for the progress of science. Most importantly, IAKM exhibited a cohesive and active core membership with pivotal roles played by a number of active members, which contributed significantly to the growth of the Association and, in general, to the advancements in the field of KM through collaborative knowledge building.

Entre o montante de residuos solidos urbanos produzidos diariamente incluem-se rejeitos com caracteristicas de toxicidade, inflamabilidade, corrosividade e potencial contaminante, os quais merecem atencao especial, uma vez que sao classificados pela NBR no 10.004/2004 como residuos perigosos. Este e o caso dos residuos de medicamentos domiciliares (RMD), como frascos, comprimidos, seringas etc., que podem ser gerados em residencias e, quando descartados incorretamente, contaminam o solo e os corpos hidricos. Diante dessa problematica, a Lei cearense no 15.192, de 19 de julho de 2012, estabeleceu a implantacao da logistica reversa para RMD em farmacias, drogarias e distribuidores de medicamentos, para que o consumidor final tenha acesso a alternativas corretas de descarte. Nesse contexto, o presente trabalho buscou verificar, atraves de pesquisa de campo para registro fotografico e preenchimento de formulario, o atendimento a esta Lei no Centro do Municipio de Fortaleza, bairro com maior numero de estabelecimentos farmaceuticos do municipio. Os resultados mostram que apenas 7% das farmacias recebiam os RMD e que em mais de 60% dos estabelecimentos e perceptivel o desconhecimento da normativa em questao, indicando uma possivel falha na capacitacao dos profissionais desses estabelecimentos, desconhecimento do proprietario/gestor do estabelecimento ou deficiencia na fiscalizacao desse quesito por orgaos publicos. Portanto, e necessario que o poder publico atue efetivamente com politicas publicas, fiscalizacao e outras acoes, para que fabricantes e importadores de medicamentos - base do comercio de farmacos - apoiem a logistica reversa de RMD iniciada no distribuidor final, ademais de medidas de educacao ambiental para o consumidor final.

Pineapple (Ananas comosus L. Merr.), Waste Streams, Characterisation and Valorisation: An Overview

Being able to read well is crucially important for language learners. Successful performance at elementary and high school level, as well as on higher levels of academic education, is partly dependent on the ability to read. It is believed that good learners are those who are proficient in reading. However, building such a connection between a reader and the written information is complex for both English as a second language (ESL) and English as a foreign language (EFL) students, and requires the application of various reading strategies. The present study aimed to investigate EFL Bosnian learners' awareness of the use of various reading strategies. Furthermore, the study investigated students' reading habits, favorite reading materials, and the purpose of reading. It was conducted among fifty-seven ninth grade elementary school students. The findings proved that these students are aware of the importance of reading and development of reading skills, as well as of the importance of using appropriate reading strategies in order to be proficient readers and eventually to be more successful in the overall process of learning.

This paper is concerned with a special case of stochastic distributed optimal control, where the objective is to design a structurally constrained controller for a system subject to state and input power constraints. The structural constraints are induced by the directed communication between local controllers over a strongly connected graph. Based on the information structure present, that is, who knows what and when, we provide a control synthesis with the optimal control law consisting of two parts: one that is based on the common information between the subsystems and one that uses more localized information. The developed method is applicable to an arbitrary number of physically interconnected subsystems.

Abstract Polycyclic aromatic hydrocarbons (PAHs) are formed from anthropogenic activities, i.e. industrial emissions, incomplete combustion of petroleum, coal and other fossil fuels and other industrial and domestic activities. Research areas of this study are four representative locations in the industrial complex, in the city of Banja Luka, Republic of Srpska, Bosnia and Herzegovina. The main objective of the paper is to determine the ecological risk and to assess probable sources of PAHs contamination in soil and groundwater. The results of this study reflect the effects of coal combustion (pyrogenic origin), petrogenic and biomass origin and may provide basic data for the remediation of PAHs in the location. The ecological risk in soil (at depths of 30, 100, 200, 300 and 400 cm) and groundwater is determined. The mean values of ecological risk in soil and groundwater decreased with soil depth. Values of RQ(NCs) for groundwater were found at high ecological risk, for Ant, Chr, DahA, Acy, Pyr, BaA, Phe, Flo, Nap, Ace and Fluo, with values 28.57, 20.59, 300.00, 242.86, 185.71, 1700.0, 76.67, 53.33, 15.83, 100.00 and 57.14, respectively. ∑16PAH indicated high ecological risk for most PAHs, which decreased with soil depth. The value of RQ(NCs) for ΣPAHs in groundwater indicates high ecological risk (ΣPAHs ≥ 800 and RQ(MPCs) ≥ 1). This is the first study on the ecological risk of PAHs in soil and groundwater in industrial soils in Banja Luka and provides baseline information for further studies and additional investigations of this industrial complex.

Abstract Small and medium-sized enterprises (SMEs) from emerging markets are the most vulnerable types of firms, especially in times of crisis due to time and resource constraints. Thus, this paper aims to help SMEs from emerging markets in choosing the right business partners with whom to cooperate to develop relevant innovations in crisis periods in general, and during the COVID-19 pandemic in particular. To obtain relevant insights, qualitative data from SMEs in Bosnia and Herzegovina were collected in March-April 2020. The findings show that SMEs have embraced new collaborations with business customers and competitors, and developed a collaborative mindset opposed to the traditionally competitive way of doing business in emerging markets. Based on the findings, this paper presents a set of recommendations for managers, and suggests several future research opportunities around the management of openness in the context of SMEs from emerging markets.

BACKGROUND Acute ischemic stroke (AIS) frequently results in the development of cognitive impairment, which quite often persists. The pathophysiological mechanisms involved in the development of cognitive impairment are only partially elucidated. The aim of this study was to evaluate the correlation between interleukin 6 (IL-6) and tumor necrosis factor-alpha (TNF-α) serum levels with cognitive impairment in AIS patients. SUBJECTS AND METHODS This hospital-based case-control study was performed during December 2014 - May 2018. A total number of 130 randomly selected patients were prospectively recruited from the Department of Neurology, Clinical Center University of Sarajevo. The study examined 100 first-ever AIS patients, while 30 comprised the non-stroke control group of patients with discogenic lumbosacral radiculopathy. All participants were evaluated using the Mini-Mental State Examination, the Montreal Cognitive Assessment, the Frontal Assessment Battery, and the Addenbrooke's Cognitive Examination-Revised. Cognitive testing and laboratory analyses were performed within the first three days of admission in all patients while AIS patients were reassessed on the 15thday of hospitalization. RESULTS Female stroke patients with cognitive impairment had significantly higher baseline levels of IL-6 (p<0.017), and TNF-α (p<0.017) than those without cognitive impairment. In the control measurement, a significant difference in IL-6 levels (p=0.037) in male and TNF-α levels (p=0.042) in female stroke patients with cognitive impairment was observed. CONCLUSIONS These findings indicate that pro-inflammatory cytokines are probably implicated in the pathogenesis of cognitive decline in AIS patients.

Introduction: Vaccine inequality inflames the COVID-19 pandemic. Ensuring equitable immunization, vaccine empathy is needed to boost vaccine donations among capable countries. However, damaging narratives built around vaccine donations such as “vaccine diplomacy” could undermine nations’ willingness to donate their vaccines, which, in turn, further exacerbate global vaccine inequality. However, while discussions on vaccine diplomacy are on the rise, there is limited research related to vaccine diplomacy, especially in terms of its characteristics and effects on vaccine distribution vis-à-vis vaccine empathy. Thus, to bridge the research gap, this study aims to examine the defining attributes of vaccine diplomacy and its potential effects on COVID-19 immunization, particularly in light of vaccine empathy. Methods: A narrative review was conducted to shed light on vaccine diplomacy’s defining attributes and effects in the context of COVID-19 vaccine distribution and dissemination. Databases such as PubMed and Medline were utilized for literature search. Additionally, to ensure up-to-date insights are included in the review, validated reports and reverse tracing of eligible articles’ reference lists in Google Scholar have also been conducted to locate relevant records. Results: Vaccine empathy is an individual or a nation’s capability to sympathize with other individuals or nations’ vaccine wants and needs, whereas vaccine diplomacy is a nation’s vaccine efforts that aim to build mutually beneficial relationships with other nations ultimately. Our findings show that while both vaccine empathy and vaccine diplomacy have their strengths and weaknesses, they all have great potential to improve vaccine equality, particularly amid fast-developing and ever-evolving global health crises such as COVID-19. Furthermore, analyses show that, compared to vaccine empathy, vaccine diplomacy might be a more sustainable solution to improve vaccine donations mainly because of its deeper and stronger roots in multilateral collaboration and cooperation. Conclusion: Similar to penicillin, automated external defibrillators, or safety belts amid a roaring global health disaster, COVID-19 vaccines are, essentially, life-saving consumer health products that should be available to those who need them. Though man-made and complicated, vaccine inequality is nonetheless a solvable issue—gaps in vaccine distribution and dissemination can be effectively addressed by timely vaccine donations. Overall, our study underscores the instrumental and indispensable role of vaccine diplomacy in addressing the vaccine inequality issue amid the COVID-19 pandemic and its potentials for making even greater contributions in forging global solidarity amid international health emergencies. Future research could investigate approaches that could further inspire and improve vaccine donations among capable nations at a global scale to advance vaccine equity further.

There is not a single country in the world that is so rich that it can remove all level crossings or provide their denivelation in order to absolutely avoid the possibility of accidents at the intersections of railways and road traffic. In the Republic of Serbia alone, the largest number of accidents occur at passive crossings, which make up three-quarters of the total number of crossings. Therefore, it is necessary to constantly find solutions to the problem of priorities when choosing level crossings where it is necessary to raise the level of security, primarily by analyzing the risk and reliability at all level crossings. This paper presents a model that enables this. The calculation of the maximal risk of a level crossing is achieved under the conditions of generating the maximum entropy in the virtual operating mode. The basis of the model is a heterogeneous queuing system. Maximum entropy is based on the mandatory application of an exponential distribution. The system is Markovian and is solved by a standard analytical concept. The basic input parameters for the calculation of the maximal risk are the geometric characteristics of the level crossing and the intensities and structure of the flows of road and railway vehicles. The real risk is based on statistical records of accidents and flow intensities. The exact reliability of the level crossing is calculated from the ratio of real and maximal risk, which enables their further comparison in order to raise the level of safety, and that is the basic idea of this paper.

INTRODUCTION Topical corticosteroids are group of drugs which have anti-in?ammatory, immuno-suppressive, anti-proliferative and vasoconstrictive effects and are among the most commonly prescribed medication, important and efficacious for management of various dermatological disorders. Strict implementation of the existing regulations is the need of the hour to prevent their widespread abuse. Aim of the study was to investigate the usage of topical corticosteroids therapy with the recipe of a doctor and without it. SUBJECTS AND METHODS The subjects were patients who visited Pharmacies in Mostar from April to July 2020 and were buying topical corticosteroids with or without a recipe or medical report from the doctor. 80 subjects completed a questionnaire themselves included: the way of buying a topical corticosteroids, the information about using topical corticosteroids earlier, the information about subject's visits to the doctor; the length of time using topical corticosteroids, the type of topical corticosteroids used, the part of body the topical corticosteroids was applied on. RESULTS A total of 80 subjects were treated in the observed period, 58.8% were female. 72.5% subjects had already used local corticosteroids, 62.50% purchased the drug at the recommendation of the pharmacist, 66.30% had no recent diagnosis or no diagnosed disease at all, 21.25% used the drug for more than a month, the most often purchased one was moderate potent local corticosteroid Betamethasone diproprionate 0.05%. Most commonly subjects applied local corticosteroids on arms (50%). CONCLUSION Strict regulations regarding only prescription-based dispensing of local corticosteroids must be put into practice. This will hopefully bring down both the extremes of ever increasing cases of steroid-induced dermatoses in everyday dermatology practise on one hand and the irrational fears of using TCs in well justified indications on the other.