Conceptual Analysis: A Method for Understanding Information as Evidence, and Evidence as Information

The utility of conceptual analysis for archival science is assessed by means of an exploratory evaluation in which the concept of evidence is analyzed. Usage of the term “evidence” in the philosophies of science, law, and history is briefly reviewed; candidates for necessary conditions of evidentiariness are identified and examined; and taxonomies are built of evidentiariness and of archival inference. Correspondences are shown to exist between the concepts of evidentiariness and relevance, and between the domains of archival science and social epistemology, thereby pointing in promising directions for further research. The tentative conclusion is reached that conceptual analysis may profitably be used to improve understanding of archival concepts.     

Complex Systems Research in Educational Psychology: Aligning Theory and Method

The purpose of this work is to provide an overview of complex systems research for educational psychologists. We outline a philosophically and theoretically sourced definition of complex systems research organized around complex, dynamic, and emergent ontological characteristics that is useful and appropriate for educational psychology. A complex systems approach is positioned as a means to align underexplored elements of existing theory with appropriate interaction dominant theoretical models, research methods, and equation-based analytic techniques. We conclude with a brief discussion of several foundational topics for complex systems research in educational psychology.     

Molecular game theory for a toxin-dominant food chain model

Animal toxins that are used to subdue prey and deter predators act as the key drivers in natural food chains and ecosystems. However, the predators of venomous animals may exploit feeding adaptation strategies to overcome toxins their prey produce. Much remains unknown about the genetic and molecular game process in the toxin-dominant food chain model. Here, we show an evolutionary strategy in different trophic levels of scorpion-eating amphibians, scorpions and insects, representing each predation relationship in habitats dominated by the paralytic toxins of scorpions. For scorpions preying on insects, we found that the scorpion α-toxins irreversibly activate the skeletal muscle sodium channel of their prey (insect, BgNa_V1) through a membrane delivery mechanism and an efficient binding with the Asp/Lys-Tyr motif of BgNa_V1. However, in the predatory game between frogs and scorpions, with a single point mutation (Lys to Glu) in this motif of the frog''s skeletal muscle sodium channel (fNa_V1.4), fNa_V1.4 breaks this interaction and diminishes muscular toxicity to the frog; thus, frogs can regularly prey on scorpions without showing paralysis. Interestingly, this molecular strategy also has been employed by some other scorpion-eating amphibians, especially anurans. In contrast to these amphibians, the Asp/Lys-Tyr motifs are structurally and functionally conserved in other animals that do not prey on scorpions. Together, our findings elucidate the protein-protein interacting mechanism of a toxin-dominant predator-prey system, implying the evolutionary game theory at a molecular level.     

Comparing Bachelor’s Degree Curricula at Three Groups of Colleges and Universities: Flexibility or Idiosyncrasy?*

Despite baccalaureates in criminal justice (BCJ) being among the most awarded degrees in this country, little published research has appeared in recent years on these programs or their curricula. Using 2015–2016 data collected from the population of BCJ-granting institutions (N = 670) in the U.S., we partially replicated Southerland’s 2002 Criminal justice curricula in the United States: A decade of Change and extended Sloan and Buchwalter’s 2016 The state of bachelor’s degree programs in the United States: Institutional, department, and curricula features analyses of BCJ curricula by comparing selected features of them across three groups of colleges/universities: public, private, not-for-profit, and private, for-profit. Results revealed significant differences existed in curricula by institutional locus of control, indicating a general lack of consensus on undergraduate curricula, including in such fundamental areas as total hours needed for the major. We discuss the implications of these results for the discipline, including revisiting accreditation as a mechanism for creating standardized curricula, and suggest further research on the status of undergraduate education to help insure the discipline offers the highest quality baccalaureate programs possible.     

Muscle recruitment patterns of the subscapularis,serratus anterior and other shoulder girdle muscles during isokinetic internal and external rotations

The aims of this study were to investigate the differences in peak muscle activity and recruitment patterns during high- and low-velocity, concentric and eccentric, internal and external isokinetic shoulder rotations. Electromyographic activity of the rotator cuff and eight superficial muscles of the shoulder girdle was recorded on 25 healthy adults during isokinetic internal and external shoulder rotation at 60°/s and 240°/s. Peak muscle activity, electromyographic envelopes and peak isokinetic moments were analyzed using three-factor ANOVA and statistical parametric mapping. The subscapularis and serratus anterior showed moderate to high peak activity levels during each conditions, while the middle and posterior deltoids, upper, middle and lower trapezius, infraspinatus and supraspinatus showed higher peak activity levels during external rotations (+36.5% of maximum voluntary activation (MVA)). The pectoralis major and latissimus dorsi were more active during internal rotations (+40% of MVA). Only middle trapezius and pectoralis major electromyographic activity decreased with increasing velocity. Peak muscle activity was similar or lower during eccentric contractions, although the peak isokinetic moment increased by 35% on average. The subscapularis and serratus anterior appear to be important stabilizers of the glenohumeral joint and scapula. Isokinetic eccentric training at high velocities may allow for faster recruitment of the shoulder girdle muscles, which could improve joint stability during shoulder internal and external rotations.     

Experimental validation of dynamic stability analysis applied to dart flight

The game of darts attracts a large international following and can be fiercely competitive. Despite its popularity, and the large equipment market, no previous peer-reviewed studies have examined the trajectory of a dart in flight. This study used high-speed video techniques to measure the trajectories of 225 dart throws from 19 amateur players. The dart’s pitch and angle of attack were found to oscillate during flight in a manner that is analogous to damped harmonic motion. It was also found that the dart’s oscillation frequency was strongly correlated to launch speed, whilst its characteristic wavelength and damping ratio were independent of launch speed. The measured wavelength of oscillation (2.16 m) was found to be similar to the regulation throwing distance (2.37 m). It is proposed that the dart is ‘tuned’ to the throwing distance such that it undergoes one full oscillation before striking the board. The dart flight was modelled using a classical dynamic stability analysis and good agreement was found between the experimental observations and the theoretical predictions. The success of the model confirms that the approach can be used to explore the dynamics of different dart designs through parametric sensitivity analyses.     

‘Yes we are inclusive’: Examining provision for young people with disabilities in community sport clubs

The last two decades within Australia have witnessed a range of policies and strategies seeking to promote the inclusion of young people with disabilities within mainstream community sport clubs. Whilst research at an institutional level has highlighted the problems with mainstreaming agendas, few studies have examined how grassroots clubs, as key components of the supply side of inclusive provision seek to respond to such policy imperatives. In this paper, therefore, the authors provide a critical analysis of the ways in which clubs engage with inclusion policies in practice. Theoretically, the authors draw on the concept of policy enactment and educational inclusivity. Through analysis of semi-structured interviews with club volunteers, the findings illustrate three key areas. Firstly, the importance of individual volunteers in establishing and developing provision within clubs; secondly, the largely separatist nature of disability provision within clubs; and thirdly, that policies tend to encourage club to focus on narrow forms of participation that lead to competitive pathways and mirror the structure of mainstream sport. In the conclusion, the authors problematize the notion of inclusion presented in policy and practice, suggesting such imperatives do not encourage a holistic approach.