Re-entry: a guide to success?

This article is based upon a former prisoner/parolee’s first hand account and analyzes some of the more obvious obstacles awaiting parolees when released from prison. Included is an examination of some basic resources the author considered necessary for successful re-entry. Potential conflicts between providing helpful resources and the status quo within the current Prison-Industrial Complex are also considered.     

Pauli Murray’s journey toward social justice

Pauli Murray’s lifelong fate was to be both ahead of her times concerning racism, heteropatriarchy, and class exploitation, yet largely behind the scenes within social movements that challenged these systems of oppression. As a truly independent African American feminist thinker, Murray’s accomplishments have long remained relatively unknown. This review essay analyses The Firebrand and the Lady and Jane Crow, two important biographies that constitute important additions to the growing corpus of scholarship on Murray’s life. These books lay a scholarly foundation for studying not only the life of this neglected African American feminist intellectual activist, but also how her ideas and actions catalyzed social change. Drawing upon contemporary anti-racist, feminist and intersectional frameworks, this essay analyses how both books draw upon race, class, gender, and sexuality as categories of analysis, yet place different analytical weight on these concepts.     

A strategy to end parole dependency

This article explores the moral, political, economic and philosophical reasons for the expansion of the prisoner re-entry industry in the United States over the last several years. Tracing the influence of the military-industrial-prison complex and its mindset of “crackpot-cynical” realism rooted in a fear-based model of human nature, it argues that the very system and policies set up to control the “problem” of crime has led to an exacerbation of it, creating an ever-expanding, permanent “industry” that has traumatized both ‘ruler and ruled’ in a never-ending cycle of pain, mistrust, moral numbness and dysfunctional dependency. The article attempts to unite political and spiritual progressives and begin the mobilization necessary for radical structural and moral changes harkening back to the dissensus politics and ‘spiritual toughness’ of the civil rights and welfare rights tradition of the 1950s, 1960s and 1970s.     

Cortical mechanisms of smooth eye movements revealed by dynamic covariations of neural and behavioral responses

Neural activity in the frontal eye fields controls smooth pursuit eye movements, but the relationship between single neuron responses, cortical population responses, and eye movements is not well understood. We describe an approach to dynamically link trial-to-trial fluctuations in neural responses to parallel variations in pursuit and demonstrate that individual neurons predict eye velocity fluctuations at particular moments during the course of behavior, while the population of neurons collectively tiles the entire duration of the movement. The analysis also reveals the strength of correlations in the eye movement predictions derived from pairs of simultaneously recorded neurons and suggests a simple model of cortical processing. These findings constrain the primate cortical code for movement, suggesting that either a few neurons are sufficient to drive pursuit at any given time or that many neurons operate collectively at each moment with remarkably little variation added to motor command signals downstream from the cortex.     

Three-dimensional model to predict muscle forces and their relation to motor variances in reaching arm movements

A three-dimensional (3-D) arm movement model is presented to simulate kinematic properties and muscle forces in reaching arm movements. Healthy subjects performed reaching movements repetitively either with or without a load in the hand. Joint coordinates were measured. Muscle moment arms, 3-D angular acceleration, and moment of inertias of arm segments were calculated to determine 3-D joint torques. Variances of hand position, arm configuration, and muscle activities were calculated. Ratios of movement variances observed in the two conditions (load versus without load) showed no differences for hand position and arm configuration variances. Virtual muscle force variances for all muscles except deltoid posterior and EMG variances for four muscles increased significantly by moving with the load. The greatly increased variances in muscle activity did not imply equally high increments in kinematic variances. We conclude that enhanced muscle cooperation through synergies helps to stabilize movement at the kinematic level when a load is added.     

Breastfeeding and feminism: A focus on reproductive health, rights and justice

Infant feeding occurs in the context of continued gender inequities and in the context of a feminist movement that left women vulnerable to a system that defined the male body and mind as the norm. This paper draws from a qualitative analysis of interviews conducted with women artists at the 2005 Mamapalooza music festival in New York City, and conference participants at the 2005 La Leche League International and International Lactation Consultant Association Conferences and at the 2007 Reproductive Freedom Conference to understand our collective alienation from breastfeeding and to outline a process for how we might repossess breastfeeding as a positive function in women's lives. These women find power in honoring and validating their own experiences, in claiming those experiences as legitimate feminist actions, and then drawing on these experiences to seek new meanings, customs and norms that similarly honor, value and support their rights to those experiences. They argue that we need a feminist movement that fully incorporates women's needs as biological and reproductive social beings, alongside their needs as productive beings, and a movement that defines the female body and mind as the norm.     

When Listening to the People: Lessons from Complementary and Alternative Medicine (CAM) for Bioethics

Complementary and alternative medicines (CAM) have become increasingly popular over recent decades. Within bioethics CAM has so far mostly stimulated discussions around their level of scientific evidence, or along the standard concerns of bioethics. To gain an understanding as to why CAM is so successful and what the CAM success means for health care ethics, this paper explores empirical research studies on users of CAM and the reasons for their choice. It emerges that there is a close connection to fundamental principles of medical ethics. The studies also highlight that CAM’s holistic ontology of health and illness has an empowering effect on people in caring for their health, and on an even deeper level, safeguards against biomedicine’s reducing image of oneself as biological body-machine. The question is raised what lessons bioethics should draw from this emancipatory social movement for its own relationship with biomedicine.     

Prediction of a moving target's position in fast goal-directed action

 Subjects made fast goal-directed arm movements towards moving targets. In some cases, the perceived direction of target motion was manipulated by moving the background. By comparing the trajectories towards moving targets with those towards static targets, we determined the position towards which subjects were aiming at movement onset. We showed that this position was an extrapolation in the target’s perceived direction from its position at that moment using its perceived direction of motion. If subjects were to continue to extrapolate in the perceived direction of target motion from the position at which they perceive the target at each instant, the error would decrease during the movements. By analysing the differences between subjects’ arm movements towards targets moving in different (apparent) directions with a linear second-order model, we show that the reduction in the error that this predicts is not enough to explain how subjects compensate for their initial misjudgements. Received: 10 February 1995/Accepted in revised form: 30 May 1995     

Torque and force production during shoulder external rotation: differences between transverse and sagittal planes

In joints with 3 degrees of freedom, such as the shoulder joint, the association of different movements results in changes in the behavior of the moment arm of the muscles. The capacity of torque production for the same movement can be changed when movements take place in a different plane. The objective of this study is to quantify differences between torque production and resultant force estimated during the shoulder external rotation in two movement planes: the transverse and sagittal planes (with 90 degrees of shoulder abduction). Eight individuals were evaluated using an isokinetic dynamometer and an eletrogoniometer for movements in the transverse plane and six individuals for movements in the sagittal plane. The results showed that the execution of the external rotation in the sagittal plane allowed greater torque magnitudes and resultant force compared with those in the transverse plane, probably owing to a prestretching of infraspinatus and teres minor.     

The Temporal Structure of Vertical Arm Movements

The present study investigates how the CNS deals with the omnipresent force of gravity during arm motor planning. Previous studies have reported direction-dependent kinematic differences in the vertical plane; notably, acceleration duration was greater during a downward than an upward arm movement. Although the analysis of acceleration and deceleration phases has permitted to explore the integration of gravity force, further investigation is necessary to conclude whether feedforward or feedback control processes are at the origin of this incorporation. We considered that a more detailed analysis of the temporal features of vertical arm movements could provide additional information about gravity force integration into the motor planning. Eight subjects performed single joint vertical arm movements (45° rotation around the shoulder joint) in two opposite directions (upwards and downwards) and at three different speeds (slow, natural and fast). We calculated different parameters of hand acceleration profiles: movement duration (MD), duration to peak acceleration (D PA), duration from peak acceleration to peak velocity (D PA-PV), duration from peak velocity to peak deceleration (D PV-PD), duration from peak deceleration to the movement end (D PD-End), acceleration duration (AD), deceleration duration (DD), peak acceleration (PA), peak velocity (PV), and peak deceleration (PD). While movement durations and amplitudes were similar for upward and downward movements, the temporal structure of acceleration profiles differed between the two directions. More specifically, subjects performed upward movements faster than downward movements; these direction-dependent asymmetries appeared early in the movement (i.e., before PA) and lasted until the moment of PD. Additionally, PA and PV were greater for upward than downward movements. Movement speed also changed the temporal structure of acceleration profiles. The effect of speed and direction on the form of acceleration profiles is consistent with the premise that the CNS optimises motor commands with respect to both gravitational and inertial constraints.     

Hedging Your Bets: Intermediate Movements as Optimal Behavior in the Context of an Incomplete Decision

Existing theories of movement planning suggest that it takes time to select and prepare the actions required to achieve a given goal. These theories often appeal to circumstances where planning apparently goes awry. For instance, if reaction times are forced to be very low, movement trajectories are often directed between two potential targets. These intermediate movements are generally interpreted as errors of movement planning, arising either from planning being incomplete or from parallel movement plans interfering with one another. Here we present an alternative view: that intermediate movements reflect uncertainty about movement goals. We show how intermediate movements are predicted by an optimal feedback control model that incorporates an ongoing decision about movement goals. According to this view, intermediate movements reflect an exploitation of compatibility between goals. Consequently, reducing the compatibility between goals should reduce the incidence of intermediate movements. In human subjects, we varied the compatibility between potential movement goals in two distinct ways: by varying the spatial separation between targets and by introducing a virtual barrier constraining trajectories to the target and penalizing intermediate movements. In both cases we found that decreasing goal compatibility led to a decreasing incidence of intermediate movements. Our results and theory suggest a more integrated view of decision-making and movement planning in which the primary bottleneck to generating a movement is deciding upon task goals. Determining how to move to achieve a given goal is rapid and automatic.     

A model of plant-to-plant movement of aphids III. Studies of actual movement and apparent movement by simulation technique

The plant-to-plant movement of aphids was investigated by the simulation technique in this report. Trials satisfying the following conditions are repeated and the results are compared withShiyomi 's model (1967).

1. An arbitrary individual moves at any moment.
2. The individual moves straightly forward an arbitrary direction and climbs up the plant that he first encounters with.
3. There is no concentrative birth and death.

Some of the results are as follows:

1. For an ideal state of movement, an equation describing the relationship between the frequency of actual movement and the degree of changes in the spatial distribution by movement was obtained.
2. The actual movements, whose frequency we cannot count, changes the spatial distribution of insects, and this change can be evaluated by the changes of values of the parameters contained inShiyomi 's model. Using the statement (i), we can also estimate the frequency of movements of aphids in the ideal (extreme) state.

     

The speed of mitochondrial movement is regulated by the cytoskeleton and myosin in Picea wilsonii pollen tubes

Strategic control of mitochondrial movements and cellular distribution is essential for correct cell function and survival. However, despite being a vital process, mitochondrial movement in plant cells is a poorly documented phenomenon. To investigate the roles of actin filaments and microtubules on mitochondrial movements, Picea wilsonii pollen tubes were treated with two microtubule-disrupting drugs, two actin-disrupting drugs and a myosin inhibitor. Following these treatments, mitochondrial movements were characterized by multiangle evanescent wave microscopy and laser-scanning confocal microscopy. The results showed that individual mitochondria underwent three classes of linear movement: high-speed movement (instantaneous velocities >5.0 μm/s), low-speed movement (instantaneous velocities <5.0 μm/s) and variable-speed movement (instantaneous velocities ranging from 0.16 to 10.35 μm/s). 10 nM latrunculin B induced fragmentation of actin filaments and completely inhibited mitochondrial vectorial movement. Jasplakinolide treatment induced a 28% reduction in chondriome motility, and dramatically inhibition of high-speed and variable-speed movements. Treatment with 2,3-butanedione 2-monoxime caused a 61% reduction of chondriome motility, and the complete inhibition of high-speed and low-speed movements. In contrast to actin-disrupting drugs, microtubule-disrupting drugs caused mild effects on mitochondrial movement. Taxol increased the speed of mitochondrial movement in cortical cytoplasm. Oryzalin induced curved mitochondrial trajectories with similar velocities as in the control pollen tubes. These results suggest that mitochondrial movement at low speeds in pollen tubes is driven by myosin, while high-speed and variable-speed movements are powered both by actin filament dynamics and myosin. In addition, microtubule dynamics has profound effects on mitochondrial velocity, trajectory and positioning via its role in directing the arrangement of actin filaments.     

Organization of a complex movement: fixed and variable components of the cockroach escape behavior

The escape behavior of the cockroach Periplaneta americana was studied by means of high speed filming (250 frames/s) and a computer-graphical analysis of the body and leg movements. The results are as follows: 1. The behavior begins with pure rotation of the body about the posteriorly located cerci, followed by rotation plus forward translation, and finally pure translation (Figs. 1, 2). 2. A consistent inter-leg coordination is used for the entire duration of the turn (Fig. 3A). At the start of the movement, five or all six legs execute their first stance phase (i.e. leg on the ground during locomotion) simultaneously. By the end of the turn the pattern has changed to the alternate 'tripod' coordination characteristic of insect walking. The change-over from all legs working together, to working alternately, occurs by means of a consistent pattern of delays in the stepping of certain legs. 3. The movements made by each leg during its initial stance phase are carried out using consistent movement components in the anterior-posterior (A-P) and the medial-lateral (M-L) axes (Fig. 4A). The movement at a particular joint in each middle leg is found to be diagnostic for the direction of turn. 4. The size and direction of a given leg's M-L movement in its initial stance phase depends on the same leg's prior A-P position (Fig. 5). No such feedback effects were seen among different legs. 5. Animals that are fixed to a slick surface on which they make slipping leg movements show the same inter-leg coordination (Fig. 3B), direction of initial stance movement (Fig. 4B) and dependence of the leg's initial M-L movement on its prior A-P position (Fig. 6), as did free-ranging animals. 6. Cockroaches that are walking at the moment they begin their escape reverse those ongoing leg movements that are contrary to escape movements. 7. These results are discussed in terms of the overall coordination of the complex movements, and in terms of the known properties of the neural circuitry for escape. Possibilities for neurobiological follow-up of certain of the findings presented here are also addressed.     

Why was Standing Rock and the #NoDAPL campaign so historic? Factors affecting American Indian participation in social movement collaborations and coalitions

ABSTRACT

Is the #NoDAPL mobilization, which was historically unusual as a national scale grassroots campaign featuring American Indians grassroots activists and tribal governments in coalition with others, an indicator of future similar efforts? Or, will the Standing Rock resistance be a relative aberration, based on a unique set of circumstances? To explore these questions, I draw upon theory and historical scholarship about American settler colonialism; cross-group collaborations and social movement coalitions; and American Indian movements. A variety of within-group, intergroup and larger structural factors pose significant obstacles to American Indian participation in grassroots social movement coalitions. However, striking threats, the existence of social ties between American Indian movements and environmental movements, and overlap between ideologies and frames generated by each movement were sufficient to generate robust coalitional mobilization.     

‘Our bones are made of Iron’: the political ecology of Garhwali women's activism

In the Garhwal Himalaya of India's Uttarakhand State, a series of social movements emerged in the late 2000s to contest hydroelectric dams on a tributary of the sacred River Ganga. Within these opposition movements, men often took high‐profile leadership roles whereas women from a range of socio‐economic backgrounds formed the overwhelming base of participation at meetings, assemblies, and rallies. This article draws from event‐based participation and semi‐structured interviews to explore the diverse concerns that women gave to explain their engagements with opposition efforts. I counter essentialist frames and employ a feminist political ecology approach to argue that the gendered dynamics are attributable to historical, cultural, religious, and political‐economic influences. The article contributes to anthropologies of gender, environment, and social movements by taking an approach focused on disparities of practice and power that helps situate Garhwali women's roles in development contestations.     

Chimpanzee thumb muscle cross sections, moment arms and potential torques, and comparisons with humans.

This study investigates the morphological basis of differences between humans and chimpanzees in the kinematical and dynamical parameters of the musculature of the thumb. It is partly intended to test an hypothesis that human thumb muscles can exert significantly greater torques, due to larger muscle cross-sectional areas or to longer tendon moment arms or to both. We focus on the estimation of the potentials of thumb muscles to exert torques about joint axes in a sample of eight chimpanzee cadaver hands. The potential torque of a muscle is estimated by taking the product of a muscle's physiological cross-sectional area (an estimator of force) with its dynamical moment arm (derived from the slope of tendon excursion versus joint angular displacement, obtained during passive movements of cadaver thumb joints). Comparison of our results with similar data obtained for humans at the same Mayo Clinic laboratory shows significant differences between humans and chimpanzees in potential torque of most thumb muscles, those of humans generally exhibiting larger values. The primary reason for the larger torques in humans is that their average moment arms are significantly longer, permitting greater torque for a given muscle size. An additional finding is that chimpanzees and humans differ in the direction of secondary thumb metacarpal movements elicited by contraction of some muscles, as shown by differences in moment arm signs for a given movement in the same muscle. The differences appear to be related to differences in the musculo-skeletal structures of the trapeziometacarpal joint.     

Motor commands for fast point-to-point arm movements are customized for small changes in inertial load

For repeated point-to-point arm movements it is often assumed that motor commands are customized in a trial-to-trial manner, based on previous endpoint error. To test this assumption, we perturbed movement execution without affecting the endpoint error by using a modest manipulation of inertia. Participants made point-to-point elbow flexion and extension movements in the horizontal plane, under the instruction to move as fast as possible from one target area to another. In selected trials the moment of inertia of the lower arm was increased or decreased by 25%. First, we found that an unexpected increase or decrease of inertia did not affect the open loop controlled part of the movement path (and thus endpoint error was not affected). Second, we found that when the increased or decreased inertia was presented repeatedly, after 5-11 trials motor commands were customized: the first 100ms of agonistic muscle activity in the smoothed and rectified electromyographic signal of agonistic muscles was higher for the high inertia compared to the low inertia. We conclude that endpoint error is not the only parameter that is used to evaluate if motor commands lead to movements as planned.     

Predictions of mechanical output of the human M. triceps surae on the basis of electromyographic signals: the role of stimulation dynamics

In order to assess the significance of the dynamics of neural control signals for the rise time of muscle moment, simulations of isometric and dynamic plantar flexion contractions were performed using electromyographic signals (EMG signals) of m. triceps surae as input. When excitation dynamics of the muscle model was optimized for an M-wave of the medial head of m. gastrocnemius (GM), the model was able to make reasonable predictions of the rise time of muscle moment during voluntary isometric plantar flexion contractions on the basis of voluntary GM EMG signals. The rise time of muscle moment in the model was for the greater part determined by the amplitude of the first EMG burst. For dynamic jumplike movements of the ankle joint, however, no relationship between rise time of muscle moment in the experiment and muscle moment predicted by the model on the basis of GM EMG signals was found. Since rise time of muscle moment varied over a small range for this movement, it cannot be completely excluded that stimulation dynamics plays a role in control of these simple single-joint movements.     

On Black Feminist Thought: thinking oppression and resistance through intersectional paradigm

Located in African American women's everyday and historical experiences of oppression and resistance, black feminist epistemology and critical social theory, Patricia Hill Collins raises the intellectual level in all these arenas. Developed through a dynamic interaction with black women's everyday struggles, black feminist thought is important not only for its contribution to critical social theories and methodologies, but also for providing important knowledge for the use of social justice movements. It uses intersectional analysis to shed light on the relationships between the structural, symbolic and everyday aspects of domination and individual and collective struggles in various domains of social life. Collins offers an interpretive framework for understanding the experiences of African American women. However, the significance of black feminist thought reaches far beyond US and black American communities. This article is a reading of Collins’s concept of intersectionality, the relationship between oppression and resistance, and the politics of empowerment.