Assessment of the biocompatibility of three-dimensional-printed polymers using multispecies toxicity tests

Additive manufacturing was adopted in multiple fields of life sciences. It is also becoming a popular tool for rapid prototyping of microfluidic and biomedical devices. Limited studies have been performed to investigate the biological implications of using 3D printed polymers. Here we assessed the biocompatibility of seven commercially available polymers, using a battery of standardized bioassays for chemical risk assessment. Our data show that leachates from photopolymers substrata appear to be very toxic to vertebrates and several invertebrate indicator organisms. These results demonstrate significant consequences for the use of selected photopolymers in the fabrication of bio-devices.     

The associations among fundamental movement skills,self-reported physical activity and academic performance during junior high school in Finland

The purpose of this study was to analyse the longitudinal associations between (1) fundamental movement skills (FMSs) and academic performance, and (2) self-reported physical activity and academic performance through junior high school in Finland. The participants of the study were 325 Finnish students (162 girls and 163 boys), who were 13 years old at the beginning of the study at Grade 7. Students performed three FMS tests and responded to a self-reported physical activity questionnaire at Grades 7 and 8. Marks in Finnish language, mathematics and history from Grades 7, 8 and 9 were collected. Structural equation modelling with multigroup method demonstrated that in the boys’ group, a correlation (0.17) appeared between FMS and academic performance measured at Grade 7. The results also indicated that FMS collected at Grade 8 were significantly but weakly (path coefficient 0.14) associated with academic performance at Grade 9 for both gender groups. Finally, the results of this study demonstrated that self-reported physical activity was not significantly related to academic performance during junior high school. The findings of this study suggest that mastery of FMS may contribute to better student achievement during junior high school.     

Implicitly measuring attitudes towards inclusive education: a new attitude test based on single-target implicit associations

Recent research on attitudes towards inclusion uses almost exclusively explicit measures such as questionnaires. Unfortunately, explicit attitude measures are biased by social desirability, particularly when the attitude object is ‘sensible’, as with inclusive education. Implicit attitude measures are less prone to social desirability, but research on implicit attitudes towards inclusive education is scarce. Thus, we introduce a new attitude measure based on the Single-Target Implicit Association Test (ST-IAT). In our study, 163 teacher students took the new implicit attitude test and completed questionnaires on their explicit attitudes towards inclusive education and persons with disabilities and a comprehensive scale on socially desirable responding. The results support the psychometric quality of our ‘Inclusion ST-IAT’. The implicit and explicit attitude measures are correlated but empirically distinct. Furthermore, the social desirability scores were associated with explicit but not with implicit attitudes towards inclusion, i.e. our measure of attitudes towards inclusion (a sensible topic) was not biased by social desirability. We propose that implicit measures should be used to reduce the influence of social desirability in inclusive education research. To encourage replications, we outline important research questions and provide the source code of our ST-IAT, which is open and free to use.     

Are habitual runners physically inactive?

The World Health Organisation’s (WHO) physical activity guidelines recommend 150min/week of moderate- to vigorous-intensity physical activity (MVPA) accumulated in 10 min bouts. To see whether people performing habitual exercise for recreation meet these guidelines, 25 long-distance runners [mean 67 km/wk], 25 joggers [mean 28 km/wk], and 20 sedentary adults wore an ActiGraph GT3X+ accelerometer for 7 days. Sedentary time and bouts were similar in runners and sedentary adults (p > 0.46). Sedentary adults performed 20 ± 16 min/day of MVPA (usual bout duration (W50%): 9.53 ± 3.45min), with joggers and runners performing 45 ± 31min (W50%: 16.92 ± 9.53min) and 83 ± 58min (W50%: 20.35 ± 8.85min), respectively (p ≤ 0.001 versus sedentary group). Data showed that 65% of the sedentary group, 32% of joggers and 4% of long-distance runners did not meet the WHO guideline for MVPA. Failure to meet the guideline was most prominent in, but not restricted to, runners who reported ≤50km running per week. Self-reported running does not ensure adults meet physical activity guidelines or offset daily sedentary behaviours. On the other hand, the sedentary group was very close in accumulating recommended bouts of MVPA in incidental activities. Future studies should assess whether modification of work and leisure physical activity would be more fruitful than encouraging recreational exercise per se in meeting physical activity guidelines.     

Concurrent validity and reliability of torso-worn inertial measurement unit for jump power and height estimation

The purpose of the present study was to evaluate the concurrent validity and test-retest repeatability of torso-worn IMU-derived power and jump height in a counter-movement jump test. Twenty-seven healthy recreationally active males (age, 21.9 [SD 2.0] y, height, 1.76 [0.7] m, mass, 73.7 [10.3] kg) wore an IMU and completed three counter-movement jumps a week apart. A force platform and a 3D motion analysis system were used to concurrently measure the jumps and subsequently derive power and jump height (based on take-off velocity and flight time). The IMU significantly overestimated power (mean difference = 7.3 W/kg; P < 0.001) compared to force-platform-derived power but good correspondence between methods was observed (Intra-class correlation coefficient [ICC] = 0.69). IMU-derived power exhibited good reliability (ICC = 0.67). Velocity-derived jump heights exhibited poorer concurrent validity (ICC = 0.72 to 0.78) and repeatability (ICC = 0.68) than flight-time-derived jump heights, which exhibited excellent validity (ICC = 0.93 to 0.96) and reliability (ICC = 0.91). Since jump height and power are closely related, and flight-time-derived jump height exhibits excellent concurrent validity and reliability, flight-time-derived jump height could provide a more desirable measure compared to power when assessing athletic performance in a counter-movement jump with IMUs.     

Patent trolls on markets for technology - An empirical analysis of NPEs’ patent acquisitions

Patent trolls, or NPEs, appropriate profits from innovation solely by enforcing patents against infringers. They are often characterized as relying on low-quality patents, an assessment that, if correct, would imply that eradicating such patents would effectively terminate the NPE business. In this paper, we shed light on this issue by empirically analyzing NPEs’ patent acquisitions. We draw on a unique dataset of 392 U.S. patents acquired by known NPEs between 1997 and 2006, which we compare to three control groups of 784 U.S. patents each acquired by practicing firms. We find that the probability that a traded patent is acquired by an NPE rather than a practicing entity increases in the scope of the patent, in the patent density of its technology field and, contrary to common belief, in the patent's technological quality. Our findings thus support recent theoretical propositions about the NPE business model, showing that NPEs procure patents that are more likely to be infringed, harder to substitute for, and robust to legal challenges. The fact that NPE-acquired patents are of significantly higher quality than those in the control group implies that elevating minimum patent quality will not put an end to the NPE business, and suggests that this business is sustainable in the long run. We furthermore discuss the fact that NPEs are peculiar players on markets for technology insofar as they are solely interested in the exclusion right, not in the underlying knowledge. We posit that transactions involving NPEs may only be the tip of the iceberg of “patent-only” transactions, a conjecture with strong implications for the efficiency and the study of markets for technologies. Managerial and policy implications are discussed.     

Caught up in the past? Social inclusion,skills, and vocational education and training policy in England

Since the mid-1990s, governments of different political persuasion have tried to reform VET policy to address problems in skills formation and social inclusion. Despite considerable policy activism, success has been somewhat limited, and England failed to overcome the problems associated with its liberal training regime. This article assesses the failure in vocational skills formation as a political economy and a public policy problem. It challenges the determinism in the political economy literature, points to poor public policy-making, and outlines possible policy levers.     

The role of reading difficulties in the associations between task values,efficacy beliefs,and achievement emotions

Reading and Writing - The aim of this study was to examine the situational associations of reading-related task values and efficacy beliefs with achievement emotions, and whether these associations...     

Everlasting Friends and Enemies? Finnish University Personnel’s Perceptions of Internal Quality Assurance in 2010 and 2017

ABSTRACT

Even though quality assurance has played a role in European higher education for decades by now, it is still a topic of great discord. While several studies have focused on the initiation phase of quality assurance, little attention has been paid to the question on how attitudes towards quality assurance in higher education change over time. This study compares the attitudes of Finnish university personnel using data from 2010 and 2017. The results show that personnel experience quality assurance as slightly better in 2017 than in 2010, while differences concerning gender, personnel group and type of university persist. The findings underline the importance of implementing quality assurance in a stakeholder-specific way.     

Reception of the quality assurance commitments of the Bologna process in Finnish higher education institutions

This article analyses Finnish higher education institutions’ reception of the implementation of the new quality assurance systems that governments participating in the Bologna Process have committed to establishing in the Berlin Communiqué of 2003. The data were collected using a web survey and the respondents were classified with a cluster analysis. The reception was more positive in the polytechnics than in the research universities and women were more positive than men. People working in managerial positions were most positive about, and committed to, quality assurance. Most critical were young researchers in research universities working in temporary jobs. Some opinions were so strongly shared that respondents with short work experience expressed their opinions, even though they could not have personal experience of the topic in question. For some topics, respondents without personal experience, but having a critical attitude, tended to give their opinion whereas those with neutral attitude abstained from commenting.