Family risks and protective factors: Pathways to Early Head Start toddlers’ social-emotional functioning     

Jessica E. Vick Whittaker  Brenda Jones HardenHeather M. See  Allison D. MeischT’Pring R. Westbrook 《Early childhood research quarterly》2011,26(1):74

Early Head Start children may be more likely to exhibit difficulties with social-emotional functioning due to the high-risk environments in which they live. However, positive parenting may serve as a protective factor against the influence of risk on children's outcomes. The current study examines the effects of contextual and proximal risks on children's social-emotional outcomes and whether these effects are mediated by maternal sensitivity. One-hundred and fourteen low-income, high-risk mother-toddler dyads participated in this longitudinal study designed to examine the relationships between family risk, mothers’ sensitivity, and children's social-emotional functioning in Early Head Start families. Researchers conducted two 2.5-h home visits, approximately six months apart, during which they assessed mothers’ levels of family risk, maternal sensitivity, and their children's social-emotional functioning. A theoretically derived structural equation model was tested to examine the direct paths from family risk variables to children's social-emotional functioning and the indirect paths by way of the mediator variable, maternal sensitivity. Support was found for a model that identified maternal sensitivity as a mediator of the relationship between parenting stress and children's social-emotional functioning. Results have implications for providing services through Early Head Start programs that are aimed at alleviating parenting stress and enhancing maternal sensitivity.  相似文献   

A high-dexterity low-degree-of-freedom hybrid manipulator structure for robotic lion dance     

I-Ming CHEN  Song-huat YEO 《浙江大学学报(A卷英文版)》2010,11(4):240-249

Lion dance is a very popular and lively Chinese traditional art form. A robotic project in Singapore has been dedicated to the design and demonstration for similar traditional art forms using modern mechatronics technology. This paper deals with a novel six-degree-of-freedom （6-DOF） hybrid manipulator with high stiffness, high loading capability and high dexterity, mimicking the lion dancer＇s upper body motions along with the lion head movements. The design of the hybrid manipulator consists of a 2-DOF torso structure in serial configuration and a 4-DOF dual arm structure in parallel configuration. The combined 6-DOF hybrid manipulator can support the weight and dynamics of the lion head during the lion dance performance. Forward kinematics of the manipulator has been formulated and visualized for design purposes. Inverse kinematics of the hybrid manipulator were analytically derived for real-time motion control. Based on the design and modeling, a complete hybrid manipulator has been fabricated, implemented into the robotic lion, and successfully demonstrated for real robotic lion dance performance.  相似文献   

Robust H∞ control of spacecraft rendezvous on elliptical orbit     

Xiangyu Gao  Kok Lay Teo  Guang-Ren Duan 《Journal of The Franklin Institute》2012,349(8):2515-2529

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Contexts,Original Orders,and Item-Level Orientation: Responding Creatively to Users' Needs and Technological Change     

Geoffrey Yeo 《Journal Of Archival Organization》2015,12(3-4):170-185

This article questions traditional assumptions that archival aggregations must always be rigidly defined. Technology allows archival institutions to respond to users' diverse requirements by empowering them to create multiple groupings and variable orders. To take advantage of these capabilities as archives become increasingly digital, a shift toward item-level orientation will be crucial. Users will still need information about context, but the digital future will almost certainly necessitate abandoning current methods in favor of documenting contextual relationships at item level. Respect for “fonds” and original order will retain some value but will no longer be the primary means of capturing context.  相似文献   

Reliability of laser Doppler,near-infrared spectroscopy and Doppler ultrasound for peripheral blood flow measurements during and after exercise in the heat     

Hui C. Choo  Kazunori Nosaka  Jeremiah J. Peiffer  Mohammed Ihsan  Chow C. Yeo  Chris R. Abbiss 《Journal of sports sciences》2017,35(17):1715-1723

This study examined the test-retest reliability of near-infrared spectroscopy (NIRS), laser Doppler flowmetry (LDF) and Doppler ultrasound to assess exercise-induced haemodynamics. Nine men completed two identical trials consisting of 25-min submaximal cycling at first ventilatory threshold followed by repeated 30-s bouts of high-intensity (90% of peak power) cycling in 32.8 ± 0.4°C and 32 ± 5% relative humidity (RH). NIRS (tissue oxygenation index [TOI] and total haemoglobin [tHb]) and LDF (perfusion units [PU]) signals were monitored continuously during exercise, and leg blood flow was assessed by Doppler ultrasound at baseline and after exercise. Cutaneous vascular conductance (CVC; PU/mean arterial pressure (MAP)) was expressed as the percentage change from baseline (%CVC_BL). Coefficients of variation (CVs) as indicators of absolute reliability were 18.7–28.4%, 20.2–33.1%, 42.5–59.8%, 7.8–12.4% and 22.2–30.3% for PU, CVC, %CVC_BL, TOI and tHb, respectively. CVs for these variables improved as exercise continued beyond 10 min. CVs for baseline and post-exercise leg blood flow were 17.8% and 10.5%, respectively. CVs for PU, tHb (r² = 0.062) and TOI (r² = 0.002) were not correlated (P > 0.05). Most variables demonstrated CVs lower than the expected changes (35%) induced by training or heat stress; however, minimum of 10 min exercise is recommended for more reliable measurements.  相似文献   

The Reconquest as Crusade in the Anonymous De expugnatione Lyxbonensi     

Stephen Lay 《Al-Masaq: Islam & the Medieval Mediterranean》2002,14(2):123-130

De expugnatione Lyxbonensi, an intriguing account of the Christian capture of Lisbon in 1147 by a mixed force of visiting Crusaders and local Portuguese troops, offers the modern reader a unique insight into the reality of twelfth-century religious militancy. Because the anonymous author was himself one of the Crusaders, his impressions of the Portuguese are particularly illuminating. The rapid escalation of sectarian hostility throughout the Iberian peninsula during this period has generally been interpreted as a manifestation of external cultural influences. Events in Lisbon, however, present a different picture. Although the Portuguese attempted to accommodate their northern allies' religious fervour, they themselves sought to justify their aggression by claiming the far older right of reconquest. Yet beneath such protestations of religious sanction or legal legitimacy lay the more pragmatic aim of territorial expansion.  相似文献   

Pulmonary monoclonal antibody delivery via a portable microfluidic nebulization platform     

Christina Cortez-Jugo  Aisha Qi  Anushi Rajapaksa  James R. Friend  Leslie Y. Yeo 《Biomicrofluidics》2015,9(5)

Nebulizers have considerable advantages over conventional inhalers for pulmonary drug administration, particularly because they do not require coordinated breath actuation to generate and deliver the aerosols. Nevertheless, besides being less amenable to miniaturization and hence portability, some nebulizers are prone to denature macromolecular drugs due to the large forces generated during aerosolization. Here, we demonstrate a novel portable acoustomicrofluidic device capable of nebulizing epidermal growth factor receptor (EGFR) monoclonal antibodies into a fine aerosol mist with a mass median aerodynamic diameter of approximately 1.1 μm, optimal for deep lung deposition via inhalation. The nebulized monoclonal antibodies were tested for their stability, immunoactivity, and pharmacological properties, which confirmed that nebulization did not cause significant degradation of the antibody. In particular, flow cytometry demonstrated that the antigen binding capability of the antibody is retained and able to reduce phosphorylation in cells overexpressing the EGFR, indicating that the aerosols generated by the device were loaded with stable and active monoclonal antibodies. The delivery of antibodies via inhalation, particularly for the treatment of lung cancer, is thus expected to enhance the efficacy of this protein therapeutic by increasing the local concentration where they are needed.  相似文献   

Coordination and variability in the elite female tennis serve     

David Whiteside  Bruce Clifford Elliott  Brendan Lay  Machar Reid 《Journal of sports sciences》2015,33(7):675-686

Enhancing the understanding of coordination and variability in the tennis serve may be of interest to coaches as they work with players to improve performance. The current study examined coordinated joint rotations and variability in the lower limbs, trunk, serving arm and ball location in the elite female tennis serve. Pre-pubescent, pubescent and adult players performed maximal effort flat serves while a 22-camera 500 Hz motion analysis system captured three-dimensional body kinematics. Coordinated joint rotations in the lower limbs and trunk appeared most consistent at the time players left the ground, suggesting that they coordinate the proximal elements of the kinematic chain to ensure that they leave the ground at a consistent time, in a consistent posture. Variability in the two degrees of freedom at the elbow became significantly greater closer to impact in adults, possibly illustrating the mechanical adjustments (compensation) these players employed to manage the changing impact location from serve to serve. Despite the variable ball toss, the temporal composition of the serve was highly consistent and supports previous assertions that players use the location of the ball to regulate their movement. Future work should consider these associations in other populations, while coaches may use the current findings to improve female serve performance.  相似文献   

Reflections on Technical Communication Quarterly, 1991-2003: The Manuscript Review Process     

Mary M. Lay 《Technical Communication Quarterly》2004,13(1):109-119

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Teacher Preparation and Inner-City Schools: Sustaining Educational Failure   总被引：1，自引：0，他引：1  

Yeo  Frederick 《The Urban Review》1997,29(2):127-143

This article argues that the great majority of teacher education programs have become a sustaining part of urban education's cycle of failure, in particular through the values, stereotypes, and curricular and pedagogical patterns that teacher education inculcates in incipient teachers about difference, minorities, and urban schools and communities. Teacher education's capability lies chiefly in how it understands and treats programmatic minority students, how it encourages a negative perception of urban teaching itself, and how it discourages its students from understanding difference and diversity through the use of an assimilatory multiculturalism, leaving its students stereotypically uninterested in and/or unprepared for urban teaching.  相似文献