Effective body water and body mass changes during summer ultra-endurance road cycling

Because body mass change (ΔM_b) does not represent all water losses and gains, the present field investigation determined if (a) ΔM_b equalled the net effective body water change during ultra-endurance exercise and (b) ground speed and exercise duration influenced these variables. Thirty-two male cyclists (age range, 35–52 years) completed a 164-km event in a hot environment, were retrospectively triplet matched and placed into one of three groups based on exercise duration (4.8, 6.3, 9.6 h). Net effective body water loss was computed from measurements (body mass, total fluid intake and urine excreted) and calculations (water evolved and mass loss due to substrate oxidation, solid food mass and sweat loss), including (ΔEBW_gly) and excluding (ΔEBW) water bound to glycogen. With all cyclists combined, the mean ΔM_b (i.e. loss) was greater than that of ΔEBW_gly by 1200 ± 200 g (P = 1.4 × 10^–18), was similar to ΔEBW (difference, 0 ± 200 g; P = .21) and was strongly correlated with both (R² = .98). Analysis of equivalence indicated that ΔM_b was not equivalent to ΔEBW_gly, but was equivalent to ΔEBW. Due to measurement complexity, we concluded that (a) athletes will not calculate the effective body water calculations routinely and (b) body mass change remains a useful field-expedient estimate of net effective body water change.     

Is university internationalization bad for performance? Examining two different types of diversity

While most studies on diverse organizations have been directed at business organizations, the academic sector has also become increasingly international and heterogeneous. Few large-scale studies have investigated multicultural academic departments and none of those have dealt with diversity and group processes. Therefore, a survey was directed towards academics in 16 science departments in three large universities in Denmark. Results based on the response from 489 academics showed that cultural diversity, as a deep level heterogeneity, was positively related to performance and satisfaction, whereas gender diversity, as a surface level heterogeneity, was negatively associated with satisfaction. Implications of these findings are discussed in detail.     

Influence of bench angle on upper extremity muscular activation during bench press exercise

This study compared the muscular activation of the pectoralis major, anterior deltoid and triceps brachii during a free-weight barbell bench press performed at 0°, 30°, 45° and –15° bench angles. Fourteen healthy resistance trained males (age 21.4 ± 0.4 years) participated in this study. One set of six repetitions for each bench press conditions at 65% one repetition maximum were performed. Surface electromyography (sEMG) was utilised to examine the muscular activation of the selected muscles during the eccentric and concentric phases. In addition, each phase was subdivided into 25% contraction durations, resulting in four separate time points for comparison between bench conditions. The sEMG of upper pectoralis displayed no difference during any of the bench conditions when examining the complete concentric contraction, however differences during 26–50% contraction duration were found for both the 30° [122.5 ± 10.1% maximal voluntary isometric contraction (MVIC)] and 45° (124 ± 9.1% MVIC) bench condition, resulting in greater sEMG compared to horizontal (98.2 ± 5.4% MVIC) and –15 (96.1 ± 5.5% MVIC). The sEMG of lower pectoralis was greater during –15° (100.4 ± 5.7% MVIC), 30° (86.6 ± 4.8% MVIC) and horizontal (100.1 ± 5.2% MVIC) bench conditions compared to the 45° (71.9 ± 4.5% MVIC) for the whole concentric contraction. The results of this study support the use of a horizontal bench to achieve muscular activation of both the upper and lower heads of the pectoralis. However, a bench incline angle of 30° or 45° resulted in greater muscular activation during certain time points, suggesting that it is important to consider how muscular activation is affected at various time points when selecting bench press exercises.     

Educational TV Consumption and Children’s Interest in Leisure Reading and Writing: A Test of the Validated Curriculum Hypothesis

The relationship between children’s TV consumption and literacy outcomes is currently unclear, as past research has identified both linear and curvilinear trends. One explanation for the contradictory results is the varying content children consume; specifically, researchers have argued that research-based educational TV programming should be positively related to literacy outcomes whereas non research-based programming should be negatively related to literacy outcomes (what we refer to as the validated curriculum hypothesis). To test this hypothesis, students in grades 4 and 5 N = 120) completed a survey assessing educational TV consumption and leisure reading/writing behaviors. The results upheld the validated curriculum hypothesis and revealed several key moderators including composite TV consumption and parents’ reading behavior.     

The acute effects of bodyweight suspension exercise on muscle activation and muscular fatigue

This investigation examined effects of two exercise modes (barbell, BB; bodyweight suspension, BWS) on muscle activation, resistance load, and fatigue. During session one, nine resistance-trained males completed an elbow flexion one-repetition maximum (1RM). During sessions two and three, subjects completed standing biceps curls to fatigue at 70% 1RM utilizing a randomized exercise mode. Surface electromyography (sEMG) recorded muscle activation of the biceps brachii, triceps brachii, anterior deltoid, posterior deltoid, rectus abdominis, and erector spinae. BWS resistance load was measured using a force transducer. Standing maximal voluntary isometric contractions of the elbow flexors recorded at 90° were used to determine the isometric force decrement and rate of fatigue (ROF) during exercise. sEMG and resistance load data were divided into 25% contraction duration bins throughout the concentric phase. BWS resulted in a 67.7?±?7.4% decline in resistance load throughout the concentric phase (p?≤?0.05). As a result, BB elicited higher mean resistance loads (31.4?±?4.0?kg) and biceps brachii sEMG (84.7?±?27.8% maximal voluntary isometric contractions, MVIC) compared with BWS (20.4?±?3.4?kg, 63.4?±?21.6% MVIC). No difference in rectus abdominis or erector spinae sEMG was detected between exercise modes. Isometric force decrement was greater during BWS (?21.7?±?7.0?kg) compared with BB (?14.9?±?4.7?kg); however, BB (?3.0?±?0.8?kg/set) resulted in a steeper decline in ROF compared with BWS (?1.7?±?0.6?kg/set). The variable resistance loading and greater isometric force decrement observed suggest that select BWS exercises may resemble variable resistance exercise more than previously considered.     

How can Journalists Promote News Credibility? Effects of Evidences on Trust and Credibility

ABSTRACT

With reference to the current debate about a loss of trust in news media, journalism experts in practice and research often demand that journalists should concentrate on enhancing the quality of their reporting and hence focus on facts and evidences. Building on research on trust and credibility, we investigate how the use of different forms of evidences affects the credibility and quality evaluation of news stories, as well as the reading experience from the audience’s perspective. We conducted an online experiment to detect the influence of the presence of scientific sources, statistical information, and their visualization in an online article. Our findings indicate that these evidences increase the perceived credibility. At the same time, we found that adding scientific sources, statistical data and, visualizations to an article does not lessen its reading enjoyment but improves its perceived vividness in the view of news users. Further results and implications are discussed.     

Academic Staff Involvement and Openness to Diversity in International Educational Organisations: Is There a Moderating Effect of Shared Language?

Joint work among academic staff is important for solving the ever‐increasing number of complex tasks that are becoming part of everyday activities in higher education. At the same time, diversification and internationalisation may challenge collaboration processes and communication demands. Speaking a shared language consistently could be a way of overcoming problems. Hence, this study focuses on the effect of shared language among academic staff on the relation between academic staff involvement in work processes and openness to diversity. This study draws on data from 489 Danish academic staff members in science departments of three universities. Results show positive associations between academic staff involvement and all openness‐to‐diversity variables (openness to informational, linguistic, value and visible diversity). Shared language had a positive effect on openness to surface level types of diversity (linguistic and visible) but no effect on openness to deep‐level types of diversity (informational and value).     

International scientist mobility and the locus of knowledge and technology transfer

Despite the growing interest of scholars and policymakers to better understand the determinants for researchers in public science to transfer knowledge and technology to firms, little is known how temporary international mobility of scientists affects both their propensity to engage in knowledge and technology transfer (KTT) as well as the locus of such transfer. Based on a sample of more than 950 German academics from science and engineering faculties, we investigate how the duration and the frequency of scientists’ visits at research institutions outside their home country affect KTT activities. We find that most mobile scientists engage in KTT to firms both in the host and in their home country, suggesting that KTT activities to firms abroad do not substitute or crowd out, but complement KTT to firms in the home country. We further find that the longer research visits abroad are, the higher the likelihood that scientists engage in KTT to firms, again both in the host and the home country. However, the more frequently scientists visit institutions abroad, the more likely they are to engage in KTT to firms only in their home country. Our results therefore provide evidence for the benefits of “brain circulation”. The article contributes to the growing strand of the literature on scientist mobility and on the determinants of industry-science linkages at the individual level.     

Latino children’s ability to interpret in health settings: A parent–child dyadic perspective on child health literacy

To determine children’s ability to interpret in medical settings, 100 dyads of low-income, Spanish-speaking parents and their bilingual children who interpret for the parents were surveyed. Seventy-four children demonstrated adequate health literacy in English. Three theoretical perspectives (social cognitive theory, role-reversal theory, and the team-effort model) guided hypotheses about how parent and child characteristics influenced child health literacy. Structural equation model results supported the team-effort model. Children were more health literate when they were older, had better English abilities, had higher self-efficacy, and had parents with lower self-efficacy and better English language abilities. Children and parents may work as a team in medical interpreting settings, with children simultaneously compensating for and learning from parents.