Policy's Role in Socioagricultural Transition: A Community Study in Tatamagouche, Nova Scotia

In Atlantic Canada, as in rural areas around the world, many citizens are engaged in ways to adapt innovative local level solutions to the challenges posed by globalized industrial agriculture. To prevent the further unraveling of community fabric and to promote rural resilience, there is a shift in some Atlantic Canadian communities towards what Thomas Lyson terms civic agriculture (2004). Using civic agriculture as a conceptual framework, this in-depth community case study found there is a strong community of Tatamagouche farmers who tend to operate on a small, labour-intensive scale, and who value direct links with consumers. This paper investigates civic agriculture initiatives using the narrative of past socio-agricultural transition to understand present-day challenges and opportunities in realizing a locally organized system of food production and distribution. Specific policy recommendations based on this study's findings include: the integration of local mentorship and experiential learning into agricultural education; strategic planning by the province for domestic consumption increases through existing buy-local campaigns and consumer education programmes; a review of regulatory standards to accommodate small-scale and diversified family farms; and start-up aid for community-scale agricultural cooperatives. Additionally, this paper calls for a broader shift in the philosophies that shape current policy choices and recommends reframing the mandate of governmental departments like Health and Environment to address small-scale community-based agriculture, and advocating for the political recognition of the non-commodity benefits of agriculture. Keywords: civic agriculture, agricultural education, family farms, agricultural cooperative

The effect of pose variability and repeated reliability of segmental centres of mass acquisition when using 3D photonic scanning

Three-dimensional (3D) photonic scanning is an emerging technique to acquire accurate body segment parameter data. This study established the repeated reliability of segmental centres of mass when using 3D photonic scanning (3DPS). Seventeen male participants were scanned twice by a 3D whole-body laser scanner. The same operators conducted the reconstruction and segmentation processes to obtain segmental meshes for calculating the segmental centres of mass. The segmental centres of mass obtained from repeated 3DPS were compared by relative technical error of measurement (TEM). Hypothesis tests were conducted to determine the size of change required for each segment to be determined a true variation. The relative TEMs for all segments were less than 5%. The relative changes in centres of mass at ±1.5% for most segments can be detected (p < 0.05). The arm segments which are difficult to keep in the same scanning pose generated more error than other segments

How do low horizontal forces produce disproportionately high torques in human locomotion?

Although horizontal ground forces are only ~15% of vertical forces, they account for 47% and 33% of the metabolic cost in walking and running. To explain these disproportionately high metabolic costs we hypothesized that low horizontal ground forces generate relatively high torques on body segments during locomotion and this is mediated by long moment arms. We compared external force moment arms and discreet torques applied to the body segments by horizontal and vertical forces during walking and running. Sixteen subjects (21.9 ± 1.9 years) walked at 1.5 m/s and 10 subjects (23.2 ± 2.0 years) ran at 3.83 m/s. Segmental torques in the sagittal plane were partitioned into components due to horizontal and vertical forces and quantified by their angular impulses. The mean (±S.E.) ratios of horizontal to vertical ground forces (GF ratio) and angular impulses (AI ratio) in walking were 0.131 (±0.003, 95% C.I. 0.124 to 0.137) and 0.530 (±0.018, C.I. 0.497 to 0.569). Results were similar in running. In both gaits the AI ratios were significantly greater than the GF ratios because the respective C.I.s did not overlap. The horizontal forces produced 53% and 41% as much angular impulse on the body segments as did the vertical forces in walking and running despite being only 13% as large. In the two movements the moment arms for the horizontal forces averaged across foot, leg, thigh, and trunk body segments were 3.8 fold larger than those for the vertical forces. The data supported the hypothesis and suggest that the relatively low horizontal vs vertical forces accounted for a disproportionately higher percentage of the angular impulses placed on the body segments and this effect was due to relatively long moment arms for horizontal forces. These results partially explain the relatively large metabolic cost of generating relatively low horizontal forces. Originally published Journal of Biomechanics, Vol. 41, No. 8, 200

College Student Awareness of Fetal Alcohol Spectrum Disorders

Fetal alcohol spectrum disorders (FASDs) results from women drinking alcohol during pregnancy. This objective of this project is to assess college students’ awareness of FASDs and determine if education improves self-reported attitudes towards drinking while pregnant or when pregnancy is possible. Previously conducted studies have equipped healthcare professionals to provide education to at-risk mothers and to intervene in pregnant mothers. However, little research has been done on informing those who are not yet pregnant but who may become pregnant about this disease and its prevention. This study will attempt to address this gap by targeting college students, a population usually of child-bearing age which is associated with high rates of alcohol consumption. The researchers will contact professors of general education classes as well as leaders of campus organizations for permission to conduct research on students involved in these classes and organizations. Once research subjects have been identified and have given informed consent, the researchers will give a pre-test to the subjects to gather demographic information as well as baseline knowledge and attitudes. Then, a five-minute educational video will be shown to the participants which will explain the nature of FASDs and the consequences of drinking during pregnancy. Finally, a post-test will be administered immediately after the presentation to reassess knowledge and willingness to modify drinking habits. The researchers will run a Shapiro-Wilk test to evaluate the normality of the data. Parametric data will be analyzed by paired t-tests, while nonparametric data will be analyzed using Wilcoxon signed-rank. The researchers will determine how awareness and attitudes about FASDs and alcohol consumption change from the pre-test to the post-test, as well as examine how demographics information relates to attitudes and awareness

SIAMOC position paper on gait analysis in clinical practice: General requirements, methods and appropriateness. Results of an Italian consensus conference

Gait analysis is recognized as a useful assessment tool in the field of human movement research. However, doubts remain on its real effectiveness as a clinical tool, i.e. on its capability to change the diagnostic-therapeutic practice. In particular, the conditions in which evidence of a favorable cost-benefit ratio is found and the methodology for properly conducting and interpreting the exam are not identified clearly. To provide guidelines for the use of Gait Analysis in the context of rehabilitation medicine, SIAMOC (the Italian Society of Clinical Movement Analysis) promoted a National Consensus Conference which was held in Bologna on September 14th, 2013. The resulting recommendations were the result of a three-stage process entailing i) the preparation of working documents on specific open issues, ii) the holding of the consensus meeting, and iii) the drafting of consensus statements by an external Jury. The statements were formulated based on scientific evidence or experts' opinion, when the quality/quantity of the relevant literature was deemed insufficient. The aim of this work is to disseminate the consensus statements. These are divided into 13 questions grouped in three areas of interest: 1) General requirements and management, 2) Methodological and instrumental issues, and 3) Scientific evidence and clinical appropriateness. SIAMOC hopes that this document will contribute to improve clinical practice and help promoting further research in the field

Managing Hemlock in Northern New England Forests Threatened by Hemlock Woolly Adelgid and Elongate Hemlock Scale

https://digitalmaine.com/usda_feddocs/1006/thumbnail.jp

Does the Integration of Haptic and Visual Cues Reduce the Effect of a Biased Visual Reference Frame on the Subjective Head Orientation?

The selection of appropriate frames of reference (FOR) is a key factor in the elaboration of spatial perception and the production of robust interaction with our environment. The extent to which we perceive the head axis orientation (subjective head orientation, SHO) with both accuracy and precision likely contributes to the efficiency of these spatial interactions. A first goal of this study was to investigate the relative contribution of both the visual and egocentric FOR (centre-of-mass) in the SHO processing. A second goal was to investigate humans' ability to process SHO in various sensory response modalities (visual, haptic and visuo-haptic), and the way they modify the reliance to either the visual or egocentric FORs. A third goal was to question whether subjects combined visual and haptic cues optimally to increase SHO certainty and to decrease the FORs disruption effect.Thirteen subjects were asked to indicate their SHO while the visual and/or egocentric FORs were deviated. Four results emerged from our study. First, visual rod settings to SHO were altered by the tilted visual frame but not by the egocentric FOR alteration, whereas no haptic settings alteration was observed whether due to the egocentric FOR alteration or the tilted visual frame. These results are modulated by individual analysis. Second, visual and egocentric FOR dependency appear to be negatively correlated. Third, the response modality enrichment appears to improve SHO. Fourth, several combination rules of the visuo-haptic cues such as the Maximum Likelihood Estimation (MLE), Winner-Take-All (WTA) or Unweighted Mean (UWM) rule seem to account for SHO improvements. However, the UWM rule seems to best account for the improvement of visuo-haptic estimates, especially in situations with high FOR incongruence. Finally, the data also indicated that FOR reliance resulted from the application of UWM rule. This was observed more particularly, in the visual dependent subject. Conclusions: Taken together, these findings emphasize the importance of identifying individual spatial FOR preferences to assess the efficiency of our interaction with the environment whilst performing spatial tasks

Measuring Multi-Joint Stiffness during Single Movements: Numerical Validation of a Novel Time-Frequency Approach

This study presents and validates a Time-Frequency technique for measuring 2-dimensional multijoint arm stiffness throughout a single planar movement as well as during static posture. It is proposed as an alternative to current regressive methods which require numerous repetitions to obtain average stiffness on a small segment of the hand trajectory. The method is based on the analysis of the reassigned spectrogram of the arm's response to impulsive perturbations and can estimate arm stiffness on a trial-by-trial basis. Analytic and empirical methods are first derived and tested through modal analysis on synthetic data. The technique's accuracy and robustness are assessed by modeling the estimation of stiffness time profiles changing at different rates and affected by different noise levels. Our method obtains results comparable with two well-known regressive techniques. We also test how the technique can identify the viscoelastic component of non-linear and higher than second order systems with a non-parametrical approach. The technique proposed here is very impervious to noise and can be used easily for both postural and movement tasks. Estimations of stiffness profiles are possible with only one perturbation, making our method a useful tool for estimating limb stiffness during motor learning and adaptation tasks, and for understanding the modulation of stiffness in individuals with neurodegenerative diseases