OBJECTIVES: Excessive internet use (EIU) has been studied predominantly within the context of individual risk factors. Less attention has been paid to social factors, especially in a fashion complex enough to include the multiple domains of adolescent socialization. This study examined the relationship between EIU and constraints within family, school, peer groups, and neighbourhoods, while controlling for emotional and behavioural difficulties. METHODS: This study was based on survey data from the Health Behaviour in School-aged Children study, which was conducted in Slovakia in 2018. The sample of representative adolescents totalled 8400 (mean age: 13.44 years; SDage = 1.33; 50.9% boys). RESULTS: Multiple-step linear regression revealed that, after controlling for sociodemographic factors and emotional and behavioural difficulties, peer problems had the least effect, while the constraints related to family and neighbourhood stood out as especially problematic. Combined variables explained 20% variance of EIU. CONCLUSIONS: Social constraints proved to be important factors in adolescent EIU. The important role of a problematic neighbourhood is a novel finding and suggests that it should be targeted in prevention.

• Klíčová slova
• Adolescents, Excessive internet use, Internet addiction, Problematic neighbourhood, Social constraints,
• MeSH
• charakteristiky bydlení * MeSH
• chování mladistvých psychologie   MeSH
• dítě MeSH
• dospělí MeSH
• lidé MeSH
• mladiství MeSH
• používání internetu statistika a číselné údaje   MeSH
• průzkumy a dotazníky MeSH
• rodinné vztahy psychologie   MeSH
• školy * MeSH
• sociální izolace psychologie   MeSH
• vyrovnaná skupina MeSH
• Check Tag
• dítě MeSH
• dospělí MeSH
• lidé MeSH
• mladiství MeSH
• mužské pohlaví MeSH
• ženské pohlaví MeSH
• Publikační typ
• časopisecké články MeSH
• Geografické názvy
• Slovenská republika MeSH

The sustainable production and use of small-scale biogas energy are required to ensure clean household energy access in developing countries, including the Sub-Saharan Africa (SSA) region. This is influenced by market risks, which can be identified as political, economic, social, technical, legal, and environmental (PESTLE). This study examines peer-reviewed and grey literature for the period from 2000 to 2020 to identify the PESTLE constraints and assess their impact on the sustainable development of the technology in the SSA region. The production of biogas with small-scale plants is commonly done by rural and peri-urban households. Results show that economic constraints are the most dominant and reducing at a slow pace. This is followed by political constraints, which have received much attention in the last two decades. Despite the policy improvements, broader national bioenergy policies and interventions are still to make significant gains, especially in the Central African region. In order of significance, the Southern, East, and West Africa regions have made greater progress in reducing the constraints. To achieve the sustainable development of the technology, there is a need to further address the PESTLE constraints at national and regional levels. This study partly deduces that the unsustainable production, use, and inadequate regulation of the small-scale biogas sector are delaying its transition in the SSA region.

• Klíčová slova
• Anaerobic digestion, Bioenergy policy, Developing countries, Energy access, PESTLE constraints, Sustainable development,
• MeSH
• biopaliva * MeSH
• charakteristiky rodiny MeSH
• lidé MeSH
• technologie MeSH
• trvale udržitelný rozvoj * MeSH
• Check Tag
• lidé MeSH
• Publikační typ
• časopisecké články MeSH
• přehledy MeSH
• systematický přehled MeSH
• Geografické názvy
• subsaharská Afrika MeSH
• Názvy látek
• biopaliva * MeSH

To better understand evolutionary pathways leading to eusociality, interspecific comparisons are needed, which would use a common axis, such as that of reproductive skew, to array species. African mole-rats (Bathyergidae, Rodentia) provide an outstanding model of social evolution because of a wide range of social organizations within a single family; however, their reproductive skew is difficult to estimate, due to their cryptic lifestyle. A maximum skew could theoretically be reached in groups where reproduction is monopolized by a stable breeding pair, but the value could be decreased by breeding-male and breeding-female turnover, shared reproduction and extra-group mating. The frequency of such events should be higher in species or populations inhabiting mesic environments with relaxed ecological constraints on dispersal. To test this prediction, we studied patterns of parentage and relatedness within 16 groups of Ansell's mole-rat (Fukomys anselli) in mesic miombo woodland. Contrary to expectation, there was no shared reproduction (more than one breeder of a particular sex) within the studied groups, and proportion of immigrants and offspring not assigned to current breeding males was low. The within-group parentage and relatedness patterns observed resemble arid populations of 'eusocial' Fukomys damarensis, rather than a mesic population of 'social' Cryptomys hottentotus. As a possible explanation, we propose that the extent ecological conditions affect reproductive skew may be markedly affected by life history and natural history traits of the particular species and genera.

• Klíčová slova
• African mole-rat, Fukomys, dispersal, eusociality, mating system, reproductive skew,
• MeSH
• chov MeSH
• genotyp MeSH
• mikroftalmičtí podzemní hlodavci klasifikace   genetika   MeSH
• mikrosatelitní repetice MeSH
• populační genetika * MeSH
• rozmnožování genetika   MeSH
• rozšíření zvířat MeSH
• sociální chování * MeSH
• zvířata MeSH
• Check Tag
• mužské pohlaví MeSH
• ženské pohlaví MeSH
• zvířata MeSH
• Publikační typ
• časopisecké články MeSH
• práce podpořená grantem MeSH
• Geografické názvy
• Zambie MeSH

An estimated 56% of households in rural India defecated in the open in 2015, making India the most significant contributor to the global sanitation burden. This cross-sectional study uses data collected in 2016 from 499 households in rural Jharkhand to understand the constraints of latrine adoption and drivers of sanitation preferences (plans to adopt toilets and willingness to pay for toilets). Focusing on a region with a large tribal population, the study examines two types of predictors, namely structural factors (objective socioeconomic, sociocultural and ecological characteristics) and psychosocial drivers (perceived unaffordability of toilet, hygiene and sanitation knowledge, perceived health risks, attitudes, both descriptive and injunctive social norms, and perceived water stress). We find that structural constraints related to educational, economic and sociocultural inequalities predict toilet ownership. Low sanitation rates can neither be attributed to a lack of expressed demand nor lack of recognition of the disadvantages of open defecation. Similarly, variations in sanitation preferences are neither explained by differences in hygiene and sanitation knowledge nor by understandings of sanitation health risks. We find that perceived unaffordability, attitudes (perceived benefits of toilet and disadvantages of OD) and perceived descriptive social norms are of key importance. This implies a potential for persuasive strategies that manipulate social norms around sanitation, particularly if they simultaneously address perceptions around financial unaffordability of toilets and around the benefits of toilets. Importantly, however, attempts to change sanitation preferences by acting on forces of social (dis)approval (i.e. through perceived injunctive social norms) may be ineffective and generate negative unintended consequences.

• Klíčová slova
• Environmental health, India, Sanitation, Social norms, Toilets,
• MeSH
• lidé MeSH
• průřezové studie MeSH
• sanitace * MeSH
• toalety MeSH
• venkovské obyvatelstvo * MeSH
• Check Tag
• lidé MeSH
• Publikační typ
• časopisecké články MeSH
• Geografické názvy
• Indie MeSH

BACKGROUND: Still, a considerable number of older adults hardly meet the daily physical activity recommendation. The current study examined how the elderly's attitudinal and perceptional aspects were associated with their Leisure-Time Physical Activity (LTPA) participation in order to provide insight into the physical activity promotion. METHODS: Study used a total sample of 10,700 older adults aged 65+ drawn from the Health and Retirement Study (HRS) 2014-2015 in USA. Multiple questionnaire items were employed to assess older adults' attitudes and outlook across different life domains. LTPA participation was measured using two indicators-walking and sports/exercise. A technique of adjusted multivariate analysis was employed to examine the relationships between predictors and outcome variables. RESULTS: Results indicated that psychosocial indicators were significantly associated with older adults' LTPA: self-perception of ageing, self-efficacy, intrinsic motivation, spiritual engagement, perceived social tie and neighbourhood safety; while measures of perceived social relations and neighbourhood safety demonstrated different associations with walking and sports/exercise on its intensity. CONCLUSIONS: Health professionals should be well-informed about psychosocial roles, either as facilitators or constraints, in older adults' physical activity participation. Incorporation of psychosocial intervention into physical activity promotion can help older adults develop positive attitudes and inner strength linked to their health behaviour.

• Klíčová slova
• Leisure-time physical activity (LTPA), Physical activity promotion, Positive mindset, Psycho-social correlates,
• Publikační typ
• časopisecké články MeSH

Even though populations of many large carnivores are expanding throughout Europe, the Eurasian lynx population in the Western Carpathians seems unable to spread beyond the western boundaries of its current distributional range. Many factors, both extrinsic and intrinsic, can influence the potential for range expansion: landscape fragmentation, natal philopatry, low natural fecundity and high mortality, and low and sex-biased dispersal rates. In this study we used non-invasive genetic sampling to determine population size fluctuation, sub-structuring and social organisation of the peripheral lynx population at the Czech-Slovak border. Even though the population size has been relatively stable over the period studied (2010-2016), the individual inbreeding coefficients of residents at the end of the study were much higher than those of founders at the beginning of the study. While non-resident individuals (predominantly males) occurred regularly in the study population, only resident individuals with well-established home ranges participated in breeding and produced offspring. Almost half the offspring detected in the study (predominantly females) settled in or near the natal area. Subsequent incestuous mating resulted in production of inbred individuals, reduction of effective population size of the population, and sub-structuring of the population through formation of two distinct family lineages. Our study illustrates how social constraints, such as territoriality, breeding of residents and natal philopatry of females, lead to incestuous mating in small-sized populations, especially at the periphery of their distribution. This threat should be taken into account in planning of conservation and population recovery of species with similar social structure.

• MeSH
• chov MeSH
• inbreeding MeSH
• Lynx genetika   fyziologie   MeSH
• masožravci MeSH
• populační genetika MeSH
• rozšíření zvířat * MeSH
• zvířata MeSH
• Check Tag
• mužské pohlaví MeSH
• ženské pohlaví MeSH
• zvířata MeSH
• Publikační typ
• časopisecké články MeSH
• práce podpořená grantem MeSH
• Geografické názvy
• Evropa MeSH

Ritual behaviors of some form exist in every society known to anthropologists. Despite this universality, we have little understanding of how ritual behavior varies within populations or across the lifespan, nor the determinants of this variation. Here we test hypotheses derived from life history theory by using behavioral observations and oral interview data concerning participant variation in Fijian kava-drinking ceremonies. We predicted that substantial variation in the frequency and duration of participation would result from (1) trade-offs with reproduction and (2) the intrinsic status differences between ritual participants. We demonstrate that when controlling for household composition, men with young offspring participated less frequently and exhibited greater variance in their time spent at ceremonies than men without young children. However, men with a larger number of total dependents in their household participated more frequently than those with fewer. Moreover, we found that men's ascribed rank, level of education, and reliance on wage labor all significantly predict their frequency of attendance. We also found that the number of dependents a man has in his household is positively correlated with total food production, and the amount of kava he cultivates. In general, these results suggest that ritual participation is part of an important strategy employed by Fijian men for both achieving status and developing social alliances. Variation in participation in kava ceremonies by Fijian men therefore reflects the constraints of their current life history condition and their inherited rank.

• MeSH
• charakteristiky rodiny MeSH
• chování při pití * MeSH
• dospělí MeSH
• empirický výzkum MeSH
• kava MeSH
• lidé středního věku MeSH
• lidé MeSH
• rituální chování * MeSH
• sociální chování * MeSH
• socioekonomické faktory MeSH
• věkové faktory MeSH
• zemědělství MeSH
• Check Tag
• dospělí MeSH
• lidé středního věku MeSH
• lidé MeSH
• mužské pohlaví MeSH
• Publikační typ
• časopisecké články MeSH
• práce podpořená grantem MeSH
• Research Support, U.S. Gov't, Non-P.H.S. MeSH
• Geografické názvy
• Fidži MeSH

With the emergence of Olympic internationalism, scholarly networking in East Central Europe came to be dominated by the idea of scholars representing their nations, which replaced the previously leading pattern of private elite scholars with extensive international contacts. This also formalised trans-border contacts, which became increasingly seen as international. In this article, we trace the relationship between these formal and informal networks from the late 19th century to the end of the socialist period, showing that even as formalisation grew, it depended heavily on a variety of informal connections. Even during the period of socialism, when the state sought to control international exchange, scholars used informality to circumvent politically determined constraints. Nevertheless, these informal contacts were not outside the system, but were an integral part of it and depended on formal preconditions. Concentrating on Czechoslovak-Polish relations we argue that in addressing the issue of the relationship between the formal and the informal, a combination of sources must be used, which should then be scrutinised for the stories their authors wish to tell. While archival sources are used for the formal part, oral histories or memoirs reveal the informal part. In East Central Europe, formal sources are likely to ignore informality, especially when it was associated with illegality, whereas ego-documents, especially those produced after 1989, are likely to ignore or downplay connections to the state and overemphasise informality as a means of acting outside politics. Thus, writing the history of informality in socialist scholarship, not only in terms of international contacts but also in terms of everyday practices, is a way of developing counter-narratives to the state-centeredness of current research, which must be linked to a critical study of the contemporary memory of socialist scholarship that shapes the narratives told in oral history.

Mit dem Aufkommen des olympischen Internationalismus wurde die wissenschaftliche Vernetzung in Ostmitteleuropa von der Idee dominiert, dass die Gelehrten ihre Nationen repräsentieren, was das bis dahin vorherrschende Muster der privaten Gelehrtenelite mit umfangreichen internationalen Kontakten ablöste. Damit wurden auch grenzüberschreitende Kontakte formalisiert, die zunehmend als international angesehen wurden. In diesem Artikel zeichnen wir das Verhältnis zwischen dem Formellen und dem Informellen vom späten 19. Jahrhundert bis zum Ende der sozialistischen Periode nach und zeigen, dass die zunehmende Formalisierung in hohem Maße von einer Vielzahl informeller Verbindungen abhing. Selbst in der Zeit des Sozialismus, als der Staat versuchte, den internationalen Austausch zu kontrollieren, nutzten die Wissenschaftler*Innen die Informalität, um politische Schranken zu umgehen. Dennoch standen diese informellen Kontakte nicht außerhalb des Systems, sondern waren ein integraler Bestandteil desselben und hingen von formalen Voraussetzungen ab. Mit Beispielen aus den tschechoslowakisch-polnischen Beziehungen argumentieren wir, dass bei der Untersuchung des Verhältnisses zwischen dem Formellen und dem Informellen eine Kombination von Quellen verwendet werden muss, die dann auf die Geschichten hin untersucht werden sollten, die sie erzählen wollen. Während Archivquellen für den formellen Teil verwendet werden, erzählt Oral History oder Memoiren den informellen Teil. In Ostmitteleuropa werden formelle Quellen die Informalität ignorieren, vor allem wenn sie mit Illegalität in Verbindung gebracht wird. Ego-Dokumente, vor allem solche, die nach 1989 entstanden sind, spielen die Verbindungen zum Staat herunter und überbetonen die Bedeutung der Informalität als Mittel zum Handeln außerhalb der Politik. Die Geschichte der Informalität in der sozialistischen Wissenschaft nicht nur in Bezug auf internationale Kontakte, sondern auch in Bezug auf Alltagspraktiken zu schreiben, dient dazu nicht nur Gegenerzählungen zur Staatszentriertheit der aktuellen Forschung zu entwickeln, muss aber mit einer kritischen Untersuchung des zeitgenössischen Gedächtnisses der sozialistischen Wissenschaft verknüpft werden, das die in den Interviews erzählten Geschichten prägt.

• Klíčová slova
• Czechoslovakia, Informality in science, Oral history, Polish People’s Republic, Socialist internationalism,
• MeSH
• dějiny 19. století MeSH
• dějiny 20. století MeSH
• lidé MeSH
• socialismus * dějiny   MeSH
• sociální sítě MeSH
• vědecká komunikace dějiny   MeSH
• Check Tag
• dějiny 19. století MeSH
• dějiny 20. století MeSH
• lidé MeSH
• Publikační typ
• časopisecké články MeSH
• historické články MeSH
• práce podpořená grantem MeSH
• Geografické názvy
• Československo MeSH

The study examines the development of psychology in former Czechoslovakia during the period of "normalization" (1968-1989) and the challenges it faced under the communist regime. The restricted connection to Western psychology and the regime's control over all aspects of human activity negatively influenced the continuity of development in psychology. The regime demanded conformity, leaving individuals, including psychologists, in recurring states of internal conflict and intellectual discomfort when deciding how much to compromise in their personal and professional lives. The study identifies three groups of psychologists based on their adaptability to regime demands. The first group consists of those who aligned themselves with the regime, allowing them to hold positions of leadership and shape the conceptualization of the field. The second group comprises individuals who actively opposed the regime, facing significant limitations in their educational and career opportunities, and mostly being forced to leave the profession. The third group of psychologists belongs to the apolitical gray zone. A significant portion of individuals in this largest group passively complied with established norms and constraints, accepting the restrictions imposed on the development of Czechoslovak psychology. Fortunately, thanks to the persistent efforts of the proactive members of the gray zone and their willingness to endure significant discomfort, an even deeper decline of psychology during the normalization period was prevented. The study provides insights into the topics of education, research, Western influences, and adaptation to the communist regime within Czechoslovak psychology, illuminating the intricacies of living in that historical period. (PsycInfo Database Record (c) 2024 APA, all rights reserved).

• MeSH
• dějiny 20. století MeSH
• individualita * MeSH
• komunismus dějiny   MeSH
• lidé MeSH
• psychologie * dějiny   MeSH
• sociální konformita MeSH
• Check Tag
• dějiny 20. století MeSH
• lidé MeSH
• Publikační typ
• časopisecké články MeSH
• historické články MeSH
• Geografické názvy
• Československo MeSH

INTRODUCTION: Sexual size dimorphism (SSD) is a widespread phenomenon in animals including mammals. It has been demonstrated that across species, the direction and magnitude of sexual dimorphism in body size often corresponds to social systems. Moreover, many animal lineages conform to "Rensch's rule", which states that male-biased SSD increases with body size. We tested whether considerable differences in sociality and large variation in body size were connected with the evolution of SSD in the structural body size of ground squirrels, an otherwise ecologically relatively homogenous group of terrestrial rodents. RESULTS: We found the general trend of male-biased SSD in ground squirrels, however, male size increases nearly perfectly isometrically with female size among species and sociality does not explain departures from this relationship. Species with different sociality grades significantly differ in body size, with the most social species tending to be the largest. CONCLUSIONS: We suggest that lack of conformity with Rensch´s rule in ground squirrels may be attributed to their low variation in SSD, and briefly discuss three potential causes of small magnitude of SSD in the structural size in rodents: low selection on SSD in structural dimensions, ontogenetic and genetic constraints and the existence of ecological/selection factors preventing the evolution of extensive SSD.

• Publikační typ
• časopisecké články MeSH