Automating human skills : preliminary development of a human factors methodology to capture tacit cognitive skills

Despite technological advances in intelligent automation, it remains difficult for engineers to discern which manual tasks, or task components, would be most suitable for transfer to automated alternatives. This research aimed to develop an accurate methodology for the measurement of both observable and unobservable physical and cognitive activities used in manual tasks for the capture of tacit skill. Experienced operators were observed and interviewed in detail, following which, hierarchical task analysis and task decomposition methods were used to systematically explore and classify the qualitative data. Results showed that a task analysis / decomposition methodology identified different types of skill (e.g. procedural or declarative) and knowledge (explicit or tacit) indicating this methodology could be used for further human skill capture studies. The benefit of this research will be to provide a methodology to capture human skill so that complex manual tasks can be more efficiently transferred into automated processes

Task analysis of discrete and continuous skills: a dual methodology approach to human skills capture for automation

There is a growing requirement within the field of intelligent automation for a formal methodology to capture and classify explicit and tacit skills deployed by operators during complex task performance. This paper describes the development of a dual methodology approach which recognises the inherent differences between continuous tasks and discrete tasks and which proposes separate methodologies for each. Both methodologies emphasise capturing operators’ physical, perceptual, and cognitive skills, however, they fundamentally differ in their approach. The continuous task analysis recognises the non-arbitrary nature of operation ordering and that identifying suitable cues for subtask is a vital component of the skill. Discrete task analysis is a more traditional, chronologically ordered methodology and is intended to increase the resolution of skill classification and be practical for assessing complex tasks involving multiple unique subtasks through the use of taxonomy of generic actions for physical, perceptual, and cognitive actions

Real time evolution using the density matrix renormalization group

We describe an extension to the density matrix renormalization group method incorporating real time evolution into the algorithm. Its application to transport problems in systems out of equilibrium and frequency dependent correlation functions is discussed and illustrated in several examples. We simulate a scattering process in a spin chain which generates a spatially non-local entangled wavefunction.Comment: 4 pages, 4 eps figures, some minor corrections in text and Eq.(3

The Ceramic Body: Concepts of Violence, Nature, and Gender

This thesis is an exploration of the connection between women and nature, specifically the violence that has been inflicted upon them both and how it is interrelated. I positioned my research within the field of Ecofeminism, which critiques the language we (as a Western culture) use to associate women with nature and vice-versa. Traditionally, women are more often associated with nature than men are, and the environment is personified as “Mother Nature”. I argue that uncritically gendering nature as “female” is problematic because of the associations we typically make between the two, and the expectations and values we assign to them based on this association. Nature is historically viewed as inferior to civilization, and women as inferior to men: they are supposedly giving, nurturing, and passive, as opposed to taking, empowered, and active. While the assumption that women are inherently more connected to nature is harmful and perpetuates these stereotypes, there is truth in that women, and in fact all oppressed groups (based on race, sexuality, class, ability, etc), share with nature the common history of subordination and inflicted violence by the hegemony

Stinky Water and Other Ills: Environmental Justice for Rural Services

Environmental justice concerns affect rural communities and the people who are members of them. Social workers’ long-standing involvement in improving living conditions of the people and communities with whom they work make environmental justice an important responsibility. Yet there is a rural-urban divide on topics related to the environment, and rural and urban communities tend to establish different environmental priorities. Rural communities tend to prioritize local conditions and solutions over global and societal ones. Rural people distrust national policies especially those established by governmental as not being responsive to their interest. Some common environmental rural problems are identified. Environmental justice intervention for rural social workers should involve humility in understanding the local culture, judicious use of language, and involvement of local people in environmental assessments and interventions

Bio-inspired swing leg control for spring-mass robots running on ground with unexpected height disturbance

We proposed three swing leg control policies for spring-mass running robots, inspired by experimental data from our recent collaborative work on ground running birds. Previous investigations suggest that animals may prioritize injury avoidance and/or efficiency as their objective function during running rather than maintaining limit-cycle stability. Therefore, in this study we targeted structural capacity (maximum leg force to avoid damage) and efficiency as the main goals for our control policies, since these objective functions are crucial to reduce motor size and structure weight. Each proposed policy controls the leg angle as a function of time during flight phase such that its objective function during the subsequent stance phase is regulated. The three objective functions that are regulated in the control policies are (i) the leg peak force, (ii) the axial impulse, and (iii) the leg actuator work. It should be noted that each control policy regulates one single objective function. Surprisingly, all three swing leg control policies result in nearly identical subsequent stance phase dynamics. This implies that the implementation of any of the proposed control policies would satisfy both goals (damage avoidance and efficiency) at once. Furthermore, all three control policies require a surprisingly simple leg angle adjustment: leg retraction with constant angular acceleration

Representation errors and retrievals in linear and nonlinear data assimilation

This article shows how one can formulate the representation problem starting from Bayes’ theorem. The purpose of this article is to raise awareness of the formal solutions,so that approximations can be placed in a proper context. The representation errors appear in the likelihood, and the different possibilities for the representation of reality in model and observations are discussed, including nonlinear representation probability density functions. Specifically, the assumptions needed in the usual procedure to add a representation error covariance to the error covariance of the observations are discussed,and it is shown that, when several sub-grid observations are present, their mean still has a representation error ; socalled ‘superobbing’ does not resolve the issue. Connection is made to the off-line or on-line retrieval problem, providing a new simple proof of the equivalence of assimilating linear retrievals and original observations. Furthermore, it is shown how nonlinear retrievals can be assimilated without loss of information. Finally we discuss how errors in the observation operator model can be treated consistently in the Bayesian framework, connecting to previous work in this area

From the Editor

Journal of Contemporary Rural Social Work Volume 1, Number 1 Spring 2009 From the Editor: Michael R. Daley, Ph.D., University of South Alabam

A Conceptual Model for Rural Social Work

As long as social workers have considered rural social work unique from other fields of practice there has been a search to capture the essence of rural social work. Is it a rural-urban dichotomy, is it geographically or community bound, and what are the principles that guide rural practice? Answers to these questions are important to education for future social workers and rural practice. The author examines key issues in rural social work and their influence on rural social work