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Background: Physical activity (PA) during pregnancy is an effective and safe way to improve maternal health in uncomplicated pregnancies. However, compliance with PA recommendations remains low among pregnant women. Objective: The purpose of this study was to evaluate the effects of offering structured supervised exercise training (EXE) or motivational counseling on PA (MOT) during pregnancy on moderate-to-vigorous intensity physical activity (MVPA) level. Additionally, complementary measures of PA using the Pregnancy Physical Activity Questionnaire (PPAQ) and gold standard doubly labeled water (DLW) technique were investigated. The hypotheses were that both EXE and MOT would increase MVPA in pregnancy compared with standard care (CON) and that EXE would be more effective than MOT. In addition, the association between MVPA and the number of sessions attended was explored. Methods: A randomized controlled trial included 220 healthy, inactive pregnant women with a median gestational age of 12.9 (IQR 9.4-13.9) weeks. A total of 219 women were randomized to CON (45/219), EXE (87/219), or MOT (87/219). The primary outcome was MVPA (minutes per week) from randomization to the 29th gestational week obtained by a wrist-worn commercial activity tracker (Vivosport, Garmin International). PA was measured by the activity tracker throughout pregnancy, PPAQ, and DLW. The primary outcome analysis was performed as an analysis of covariance model adjusting for baseline PA. Results: The average MVPA (minutes per week) from randomization to the 29th gestational week was 33 (95% CI 18 to 47) in CON, 50 (95% CI 39 to 60) in EXE, and 40 (95% CI 30 to 51) in MOT. When adjusted for baseline MVPA, participants in EXE performed 20 (95% CI 4 to 36) minutes per week more MVPA than participants in CON (P=.02). MOT was not more effective than CON; EXE and MOT also did not differ. MVPA was positively associated with the number of exercise sessions attended in EXE from randomization to delivery (P=.04). Attendance was higher for online (due to COVID-19 restrictions) compared with physical exercise training (P=.03). Adverse events and serious adverse events did not differ between groups. Conclusions: Offering EXE was more effective than CON to increase MVPA among pregnant women, whereas offering MOT was not. MVPA in the intervention groups did not reach the recommended level in pregnancy. Changing the intervention to online due to COVID-19 restrictions did not affect MVPA level but increased exercise participation. Trial Registration: ClinicalTrials.gov NCT03679130; https://clinicaltrials.gov/ct2/show/NCT03679130 International Registered Report Identifier (IRRID): RR2-10.1136/bmjopen-2020-043671

The trader and the commercial contract are the basic notions of the commercial law. The trader is defined in various Croatian statutes so many times that it is questionable whether it represents a single notion. Everything is more complicated by the notion of undertaking which is defined in a similar multitude of statutes. Although the legislator is authorized to introduce as many definitions as it wants, the current state of affairs does not contribute to the transparency and legal certainty. The paper tries to establish firm criteria for a possible future systematization. Two models are singled out, based on the criterion whether a trader is considered as such in all legal transactions (an absolute model) or just for the needs of a specific transaction (a functional, transactional model). The chosen model affects the definition of the commercial contract. If the commercial contract begins with an absolute model of a trader, it is advisable that the contract falls within trader’s commercial activity. The Croatian law, however, adopted an asymmetric definition, which requires that the contract falls within the commercial activity of only one of the traders.

The main purpose of the article is to identify key ways for the development of electronic commerce within the framework of compliance with the norms and rules of financial law in Jordan. The object of the study is the e-commerce system and its activities in the legal field of Jordan. The scientific task is to determine the strategy for the development of e-commerce within the legal framework of Jordan, taking into account the specifics of the region. The research methodology involves the use of the hierarchy analysis method in constructing a hierarchical model, determining the sums of the elements of the columns of square inversely symmetric matrices, and checking the consistency of the results. As a result, we have determined the optimal strategy for the development of e-commerce within the framework of compliance with the norms and rules of financial law. The scientific novelty of the article lies in the proposed methodological approach to determining the strategy for the development of e-commerce in Jordan within the framework of compliance with the norms and rules of financial law. The study is limited by taking into account the specifics of e-commerce and Jordanian financial law. Prospects for further research should be devoted to the specifics of the development of e-commerce in the framework of compliance with the norms and rules of financial law in other countries of the world in order to attract international experience.

The authors examine the conditions prompting university-employed life scientists to become entrepreneurs, defined to occur when a scientist (1) founds a biotechnology company, or (2) joins the scientific advisory board of a new biotechnology firm. This study draws on theories of social influence, socialization, and status dynamics to examine how proximity to colleagues in commercial science influences individuals' propensity to transition to entrepreneurship. To expose the mechanisms at work, this study also assesses how proximity effects change over time as for-profit science diffuses through the academy. Using adjusted proportional hazards models to analyze case-cohort data, the authors find evidence that the orientation toward commercial science of individuals' colleagues and coauthors, as well as a number of other workplace attributes, significantly influences scientists' hazards of transitioning to for-profit science.

As urban development shifts from the incremental era to the stock era, urban design is becoming increasingly focused on high-quality living and human needs. However, the opening of traditional communities has been insufficiently examined. This study took Liuyun Community, a typical open community in Guangzhou (China) that has undergone a transformation from residential to commercial use, as its research object. First, more than 300 residents, tourists, and merchants were surveyed via questionnaires administered in field investigations and interviews. Next, the data from the completed questionnaires were used to construct a structural equation model consisting of five dimensions, namely commercial service value, cost value, risk value, perceptual value, and social value. The data were then analyzed to determine the correlations between perceived value and behavioral intention, satisfaction, and other psychological attributes. The following results were obtained: (1) As commercial activities in the community increased, the influence of social value, cost value, and commercial service value on behavioral intention decreased. (2) The open community inevitably had negative impacts on its citizens. However, these negative impacts were mitigated to some extent by high levels of social value. (3) Perceptions of commercial service value varied between groups.

The Arctic region is rapidly changing as a result of climate alteration, political tensions and ambitions of the Arctic and non-Arctic states. Is the existing governance considered to be adequate for effective international security cooperation in the region? On the one hand, we look optimistic at the evolution of international relations in the areas of science and technology, conservation, search and rescue coordination, tourism, etc. On the other hand, there is a significantly increased militarisation of the Arctic region. The recent rise in military activities in the North has resulted in numerous regional deployments, patrols and other incidents in the maritime Arctic. In general, militarisation together with climate change are impacting scientific-commercial activities. Also, the absence of an adequate legal regime that may respond to climate change and interruption of civil activities by military exercises in a fast and effective way hampers international cooperation. This paper problematises various aspects of interaction between scientific-commercial activities and naval operations in the Arctic region.

Purpose Social entrepreneurship has become a growing field of research interest. Yet, past research has been held back by the lack of a rigorous measurement instrument. Rather than defining social entrepreneurship as an organizational form that a venture does or does not have, this paper agrees with Dees and Anderson (2006) that the construct is better thought of as a set of practices, processes and behaviors that organizations can engage in to a higher or a lesser degree. In other words, the construct is a set of behaviors that any organization can engage in. The purpose of the paper is to develop scale items to measure the construct of organizational social entrepreneurship (OSE). Design/methodology/approach Drawing on previous literature, this paper first develops and then validates scales for measuring OSE as a third-order formative construct. As its second order, the scale includes three components that capture the heterogeneity of the OSE concept: social change intention, commercial activity and inclusive governance. Findings The OSE scale is developed and tested through a sample of 182 nascent social enterprises from 55 different countries in the world and then revalidated using a second sample of 263 mature social enterprises from 6 European countries. Results suggest that the scale items exhibit internal consistency, reliability, construct validity and nomological validity. Research limitations/implications The scale presented here offers an important new venue for social entrepreneurship theorizing. First, it allows scholars to take a broad approach toward a diverse field and to study OSE behavior in any empirical field in which it may occur. Second, the scales also allow for more focused theorizing. Scholars are encouraged to delve into the antecedents of all three components presented here and to study the different performance effects they have in terms of likelihood to survive, growth rate or potential to achieve financial sustainability. Originality/value The paper develops a multidimensional construct for OSE. In particular, the authors propose scale items for three central components of social entrepreneurship, namely, social change intentions, commercial activities and inclusive governance. The scales thus measure the three formative dimensions identified by Dees and Anderson (2006) and Defourny and Nyssens (2010).

The article deals with eSports as a perspective kind of commercial activity. The research urgency is determined by the fact that, given the active increase of eSports market with growth rates of more than 30% per year, the types of commercial activities in this field and in scientific papers are not studied in an adequate degree. The purpose of the article is to evaluate the commercial activity development in eS¬ports and to determine the perspectives for its further growth in Ukraine. In order to determine the key types of commercial activity in eSports, the main sources of revenue in this area compared to sports were investigated, which showed a large unrealized po¬tential for increasing revenues from the sale of tickets to competitions, the realization of broadcasting rights and merchandising. The study also showed that the largest num¬ber of income sources in eSports is at the stage of cyber-tournaments, which can be explained by a large consumer audience at this stage. However, unlike the world prac¬tice, computer game producers and well-known manufacturers of consumer goods in Ukraine do not finance domestic competitions, and, therefore, this stage of commer¬cial activity remains at a low level. In modern conditions, among the types of eSports activities in Ukraine, only the computer games production and the cyber-racers game are properly developed. According to authors, to improve the eSports development in Ukraine, creating the national system of regular eSports competitions is needed, which will form the basis for the development of most types of commercial activities that are part of the cyber-tournaments. To do this, one needs to create appropriate platforms, as well as improve communications with fans in social networks and at amateur competitions. All this will make eSports a highly profitable business in Ukraine.

Razmatraju se trgovac i trgovački ugovor kao temeljni pojmovi trgovačkog prava. Trgovac je u hrvatskom pravu toliko puta iznova definiran različitim zakonima da je upitno koliko se uopće može govoriti o jedinstvenom pojmu. Da priča bude još složenija, i pojam poduzetnika je definiran u približno sličnom broju zakona. Iako je zakonodavac ovlašten uvesti koliko god definicija želi, trenutno stanje ne pridonosi preglednosti ni pravnoj sigurnosti. Pokušava se pronaći čvrsto uporište za potencijalnu buduću sistematizaciju. Izdvajaju se dva modela prema kriteriju zadržava li trgovac to svojstvo u svim situacijama (apsolutni, statusni model) ili se ocjenjuje samo za potrebe pojedinog pravnog posla (funkcionalni, poslovnopravni model). Odabrani model trgovca odražava se i na definiciju trgovačkog ugovora. Ako ona polazi od statusnog modela trgovca, poželjno je da je trgovački ugovor sklopljen u okviru trgovčeve djelatnosti. Hrvatsko pravo se, pomalo neobično, opredijelilo za asimetričnu definiciju trgovačkog ugovora, po kojoj je dovoljno da samo jedan trgovac djeluje u okviru svoje djelatnosti. The trader and the commercial contract are the basic notions of the commercial law.