Mechanisms as Modal Patterns

Philosophical discussions of mechanisms and mechanistic explanation (e.g., Bechtel 2006; Bechtel and Abrahamsen 2005; Craver 2007; Craver and Darden 2014; Darden 2006) have often been framed by contrast to laws and deductive-nomological explanation. A more adequate conception of lawfulness and nomological necessity, emphasizing the role of modal considerations in scientific reasoning, circumvents such contrasts and enhances understanding of mechanisms and their scientific significance. The first part of the paper sketches this conception of lawfulness, drawing upon Haugeland (1998), Lange (2000, 2007), and Rouse (2015). This conception emphasizes the role of lawful stability under relevant counterfactual suppositions in scientific reasoning across the sciences, in place of traditional conceptions of law that are primarily confined to the physical sciences. It also extends lawful stability beyond verbally or mathematically expressed law-statements, to encompass other ways of conjoining patterns in the world with scientific pattern recognition. The remainder of this paper shows how and why mechanisms constructively exemplify this conception of lawfulness in scientific practice: • Mechanisms are robust, counterfactually stable and inductively projectible patterns, even though they are not exceptionless “laws of nature”. • Mechanistic explanations often take non-verbal forms, which consequently resist philosophical inclinations to semantic ascent, but understanding lawfulness in terms of counterfactually stable pattern recognition accounts for these ways in which scientific understanding outruns the expressive capacities of natural languages; • Mechanisms are sometimes characterized as real (“ontic”) patterns in the world, and sometimes as epistemic representations; understanding mechanisms as modal patterns shows why both conceptions are needed, as mutually supportive. • Mechanisms are typically open-ended, and only partially specified, in ways open to and directive toward further articulation and revision (“discovery”). Understanding mechanisms as modal patterns incorporates this aspect of mechanistic understanding within a broader conception of scientific understanding as embedded in research practice, rather than in bodies of knowledge extracted from it. • Mechanistic explanation has often been placed on the causal side of an opposition between causal and nomological explanation, but understanding mechanisms as modal patterns helps overcome that opposition, and contributes to a pluralist conception of causal relations and their characteristic forms of counterfactual invariance. • The recognition of mechanisms as modal patterns allows for a new way to think about the relations among distinct levels of a mechanistic hierarchy, and the broader scientific significance of mechanistic understanding

Niches and Niche Construction in Biology and Scientific Practice

Concepts of an organism’s biological environment and of niche construction as how organisms alter their environment and that of other organisms now play prominent roles in multiple sub-fields of biology, including ecology, evolution, and development. Some philosophers now use these concepts to understand the dynamics of scientific research. Others note divergences among the concepts of niche and niche construction employed in these biological fields, with implications for their possible conceptual integration. My (Rouse 2015) account of scientific research as niche constructive and of laws and lawful invariance in scientific practice illuminates these conceptual differences and their implications for integrating those domains of biological research in two ways. First, it accounts for the partial autonomy of these domains and their concepts as characteristic of scientific conceptual development. Second, it provides a more complex understanding of how research domains can be integrated, which shows how those different conceptions of niches and niche construction do not block their appropriate integration. The conclusion situates my account and its application to niche concepts both amid other philosophical uses of niche concepts to understand research environments and as exemplifying my revisionist conception of philosophical naturalism

International students experience in teacher education: creating context through play workshops

Higher education in Australia attracts many international students. Universities are challenged to prepare them with the necessary understandings, knowledge and skills to effectively participate in their study. For international students, understanding Early Childhood contexts in Australia is a new way of viewing teaching and learning from their own cultural perspective. This paper situates itself as part of a wider study “Improving work placement for international students, their mentors and other stakeholders”. A pilot program was run at Deakin University for the Master of Teaching Early Childhood students to undertake play workshops before commencing placement. Questionnaires were analysed using Interpretative Phenomenological Analysis. Three themes emerged and are discussed. The findings show that while play workshops may provide a ‘place and space’ for international students to gain knowledge, skills and understandings before going out on placement, they do have some limitations. Generalisations to other institutions cannot be made

The power of play: preparing international higher education students for practicum

With an increased number of international students undertaking higher education courses (degrees), Australian universities are challenged to prepare international students with the necessary understandings, knowledge and skills to effectively participate in the workplace. For many students, understanding Early Childhood Education in Australia is a new way of viewing teaching and learning from their own cultural perspective. In order to facilitate successful engagement during pre-service teacher practicums (placements) and in response to concerns raised by mentorteachers in the workplace, a pilot program was run at Deakin University in 2015 for students to undertake before placement. The program focused on ‘play’ as an innovative model of teaching. This paper situates itself as part of a wider study Improving work placement for international students, their mentors and other stakeholders. It draws on narrative reflection, classroom observation, questionnaire and interview data from the early childhood strand within the Master of Teaching course at Deakin University. Using Interpretative Phenomenological Analysis the data was analysed and coded into two emerging themes: building confidence and competency skills and connecting to the early childhood context. Generalisationscannot be made to other educational institutions or context however; the findings reveal that ‘play’ can be used as a powerful tool to empower students to make connection with early childhood settings. It is hoped that the findings may provide a platform for further dialogue with other universities regarding how best we can prepare international education students at Australian universities for their practicum experience

BIOLOGICAL PURIFICATION OF GROUNDWATER POLLUTED WITH NITROGENOUS COMPOUNDS

Joint Research on Environmental Science and Technology for the Eart

The effects of sunlight, disturbance, and food availability on the distribution of chironomid larvae.

General EcologyThis study investigated the effects of sunlight and disturbance on the distribution of Chironomid larvae in river systems. Artificial streams were created using water pumped from the Maple River and plastic gutters. Tiles were placed in each stream as a surface for Chironomids to colonize. Half of the streams were shaded and disturbance was imposed on some of the tiles in each stream, while the others remained undisturbed. After six weeks, the number of Chironomids present on four of the seven tiles from each stream were counted. There was no significant difference in the number of Chironomids on tiles exposed to direct sunlight and those in shaded streams. However, disturbance had a large effect on the number of Chironomids present; little or no Chironomids were found on disturbed tiles. In undisturbed areas, it appeared that Chironomids had a non-significant tendency colonize on shaded tiles. Therefore, disturbance seemed to effect Chironomid distribution while amount of sunlight had little to no effect.http://deepblue.lib.umich.edu/bitstream/2027.42/64883/1/Lockett_Rhoades_Robison_Rouse_2009.pd

WATER QUALITY SURVEY OF VIETNAM

Joint Research on Environmental Science and Technology for the Eart

Groundwater contamination with nitrogenous compounds in Kumamoto Prefecture and Hanoi City : Present conditions and adopted countermeasures

Joint Research on Environmental Science and Technology for the Eart

Generalized conductance sum rule in atomic break junctions

When an atomic-size break junction is mechanically stretched, the total conductance of the contact remains approximately constant over a wide range of elongations, although at the same time the transmissions of the individual channels (valence orbitals of the junction atom) undergo strong variations. We propose a microscopic explanation of this phenomenon, based on Coulomb correlation effects between electrons in valence orbitals of the junction atom. The resulting approximate conductance quantization is closely related to the Friedel sum rule.Comment: 4 pages, 1 figure, appears in Proceedings of the NATO Advanced Research Workshop ``Size dependent magnetic scattering'', Pecs, Hungary, May 28 - June 1, 200

Development of analytical characterization tools for process monitoring of adenovirus-based vaccines (ChAdOx and Ad5)

Product quality understanding is a critical part of viral vector vaccine manufacturing and regulation. Mass spectrometry is a technique that has widely been applied to protein-based therapeutics and could be used as a characterisation tool to monitor viral vector vaccine product quality. The ultimate objective of this Bill and Melinda Gates Foundation funded project is to enable vaccine manufacturing in Low and Middle-income countries (LMIC) through increased scientific understanding of viral vector vaccine manufacturing bottlenecks and therefore de-risking of vaccine development and manufacturing. Please click Download on the upper right corner to see the full abstract