Search results

This multi-day lesson involves grade 2-grade 4 students in exploring the life and achievements of Susan B. Anthony. It provides opportunities for students to investigate events associated with the Women’s Rights Movement as well as issues related to women’s right to vote, work, and to receive an education. This three-day learning cycle lesson will provide students with a better understanding of women’s suffrage as well as the time period and contributions of women leaders. Day 1 begins with a simulation of gender bias and follows with a Quickwrite and read aloud. On the second day, students will participate in station activities. On the third day, students will use a Bio Cube to describe the activities of a current woman reformer and how those acts have impacted U.S. history.

Most teachers in the Gulf would agree that Arab learners struggle more with reading and writing than listening and speaking. One little considered possible influence on this is the particular visual processing requirements of English. This article suggests why visual processing or visual cognition might be a particular difficulty for Arab students reading English. It offers a simple classroom checklist that may assist teachers to notice if visual processing strain could be effecting their student’s attention, motivation and performance.

The weld region obtained during friction stir welding (FSW) of metallic materials (including aluminum alloys) contains typically well-defined zones, each characterized by fairly unique microstructure and properties. The purpose of this paper is to carry out combined experimental and numerical investigations of the mechanical properties of materials residing in different weld zones of FSW joints of thick AA2139-T8 plates.

Within the experimental investigation, the following has been conducted: first, optical-microscopy characterization of the transverse sections of the FSW joints, in order to help identify and delineate weld zones; second, micro hardness field generation over the same transverse section in order to reconfirm the location and the extent of various weld zones; third, extraction of miniature tensile specimens from different weld zones and their experimental testing; and finally, extraction of a larger size tensile specimen spanning transversely the FSW weld and its testing. Within the computational investigation, an effort was made to: first, validate the mechanical properties obtained using the miniature tensile specimens; and second, demonstrate the need for the use of the miniature tensile specimens.

It is argued that the availability of weld-zone material mechanical properties is critical since: first, these properties are often inferior relative to their base-metal counterparts; second, the width of the weld in thick metallic-armor is often comparable to the armor thickness, and therefore may represent a significant portion of the armor exposed-surface area; and finally, modeling of the weld-material structural response under loading requires the availability of high-fidelity/validated material constitutive models, and the development of such models requires knowledge of the weld-material mechanical properties.

The importance of determining the mechanical properties of the material in different parts of the weld zone with sufficient accuracy is demonstrated.

The purpose of this paper is to model a nacre-like composite material, consisting of tablets and polyurea tablet/tablet interfaces, B₄C. This composite material is being considered in the construction of the so-called backing-plate, a layer within a multi-functional/multi-layer armor system.

Considering the basic functions of the backing-plate (i.e. to provide structural support for the ceramic-strike-face and to stop a high-velocity projectile and the accompanying fragments) in such an armor system, the composite-material architecture is optimized with respect to simultaneously achieving high flexural stiffness and high ballistic-penetration resistance. Flexural stiffness and penetration resistance, for a given architecture of the nacre-like composite material, are assessed using a series of transient non-linear dynamics finite-element analyses. The suitability of the optimized composite material for use in backing-plate applications is then evaluated by comparing its performance against that of the rolled homogeneous armor (RHA), a common choice for the backing-plate material.

The results obtained established: a trade-off between the requirements for a high flexural stiffness and a high ballistic-penetration resistance in the nacre-like composite material; and overall superiority of the subject composite material over the RHA when used in the construction of the backing-plate within multi-functional/multi-layer armor systems.

This study extends the authors previous research on nacre-mimetic armor to optimize the architecture of the armor with respect to its flexural stiffness and ballistic-penetration resistance, so that these properties could be increased over the levels attained in the current choice (RHA) for the backing layer of multi-functional/multi-layer armor.

The purpose of the current study is to test a model of the psychological processes that mediate the impact of managerial supportive and unsupportive behaviors on employees' job‐related attitudes and strain.

Data were collected using a cross‐sectional, online survey of employees working in a human services organization who were asked about their managers' support and attitudes toward various aspects of their jobs. The employees included direct service providers, agency administrators, and managers.

Structural equation modeling revealed that perceived job autonomy and perceived manager sentiment explained the relationship between managerial behaviors and job satisfaction, job strain, and turnover intentions. Although job self‐efficacy was significantly related to both supportive and unsupportive managerial behaviors, it did not explain the relationship between managers' support‐related behaviors and the outcomes of interest.

Since these data are based on self‐reports, common method bias may have inflated the relationships among the variables. Also, ratings of supervisor behaviors and work‐related perceptions may have been confounded with other unmeasured individual differences, such as neuroticism, and optimism. In addition, the generalizability of the theoretical model is unknown because it was tested in one organization.

Managerial and leadership development programs can draw on the study findings about particular managerial behaviors that are linked to employees' perceptions of control and to their managers' sentiments about them, which in turn influence how they feel about their jobs and organizations.

Three original contributions of the study are that: it capitalizes on a detailed, inductively‐derived behavioral measure of managerial support; it examines the effects of both supportive and unsupportive managerial behaviors; and it responds to the call for studies investigating the mechanisms whereby support influences job‐related attitudes and strain.

The purpose of this paper is to discuss the recently developed multi-physics computational model for the conventional Gas Metal Arc Welding (GMAW) joining process that has been upgraded with respect to its predictive capabilities regarding the spatial distribution of the mechanical properties controlling the ballistic limit (i.e. penetration resistance) of the weld.

The original model consists of five modules, each dedicated to handling a specific aspect of the GMAW process, i.e.: electro-dynamics of the welding-gun; radiation-/convection-controlled heat transfer from the electric arc to the workpiece and mass transfer from the filler-metal consumable electrode to the weld; prediction of the temporal evolution and the spatial distribution of thermal and mechanical fields within the weld region during the GMAW joining process; the resulting temporal evolution and spatial distribution of the material microstructure throughout the weld region; and spatial distribution of the as-welded material mechanical properties. The model is upgraded through the introduction of the sixth module in the present work in recognition of the fact that in thick steel GMAW weldments, the overall ballistic performance of the armor may become controlled by the (often inferior) ballistic limits of its weld (fusion and heat-affected) zones.

The upgraded GMAW process model is next applied to the case of butt-welding of MIL A46100 (a prototypical high-hardness armor-grade martensitic steel) workpieces using filler-metal electrodes made of the same material. The predictions of the upgraded GMAW process model pertaining to the spatial distribution of the material microstructure and ballistic-limit-controlling mechanical properties within the MIL A46100 butt-weld are found to be consistent with general expectations and prior observations.

To the authors’ knowledge, the present work is the first reported attempt to establish, using computational modeling, functional relationships between the GMAW process parameters and the mechanical properties controlling the ballistic limit of the resulting weld.

The European Union's (EU) social and employment policy emphasizes that member states should develop workforce development policies that combat work‐related stress. Within the EU, there are few comparative data on the psychosocial job strain characteristics and experiences of staff working in the vocational rehabilitative sector in mental health and intellectual disabilities. The purpose of this paper is to discuss a Leonardo Da Vinci‐funded project – The Reducing Occupational Stress in Employment Project (ROSE) – which aims to reduce stress amongst managers and support staff working in the mental health and intellectual disability occupational support sector across the EU.

This research paper reports the findings of a small‐scale across method study, using a cross‐sectional design and focus groups, on psychosocial job strain amongst managers and support workers in five European countries. Data were gathered through administration of the job content questionnaire (JCQ) and a series of focus groups.

Findings from the JCQ showed that just under 20 percent of the sample exhibited symptoms of job strain. Results from the focus groups indicated that the key stressors for workers were balancing work demands with time available to carry out tasks; poor communication within organizations; and feeling unsupported in one's work. In addition, it was found that there are no national or European data collected, at any level, upon which to base effective interventions to combat occupational stress and no effective mechanisms in the workplace to deal with occupational stress for professionals working in this sector.

Based on the findings, a web site was developed that provides helpful information to managers, trainers, and support workers to manage personal and organizational stressors and raises awareness of the issue within Europe and beyond.

The ROSE project is significant at this time considering the current thrust of EU policy initiatives on mental health, workplace stress and employee well‐being.

Although employee race has been an actively investigated area of scientific inquiry for decades, a thorough and informed understanding of the role of race in the organizational sciences has eluded us for a number of reasons. The relationship of race and stress in organizations is a prime example of this neglect and deficiency in our knowledge base, as little work has been done in this area. We attempt to address this limitation in the literature by proposing an inductively derived, review-centric framework that attempts to articulate the multiple intermediate linkages that explain the process dynamics taking place in the relationship between employee race and health and well-being in organizations. We argue that socialization processes, social networks, information and resource access, and mentoring contribute to distance and differences between racial minorities and nonminorities concerning control, reputation, performance, and political understanding and skill, which in turn, creates barriers to success, and increased stress and strain for racial minorities. The implications of this framework along with directions for future theory and research are discussed in this chapter.

Mental health (MH) and caring can be demanding for those directly and indirectly impacted. An under-researched area is that of professionals’ personal experiences of caring for a loved one with MH difficulties. This study aims to provide an in-depth exploration of psychologists’ experiences of caring and its impact on clinical practice.

A total of 11 psychologists with experiences of caring for a loved one with a diagnosed MH condition and/or MH distress participated in semi-structured interviews focused on caring experiences and its impact. Transcripts were analysed using thematic analysis.

Themes identified were as follows: personal and professional roles; the emergence of a carer identity; carer stress and strain; impact on professional practice; and dual positioning.

This study highlighted the knowledge and value of listening to professionals with lived experiences. Their ability to understand stigmatisation through personal caring experiences may facilitate the mitigation of this for vulnerable people attending clinical services.

Fiber-reinforced armor-grade polymer-matrix composite materials with a superior penetration resistance are traditionally developed using legacy knowledge and trial-and-error empiricism. This approach is generally quite costly and time-consuming and, hence, new (faster and more economical) approaches are needed for the development of high-performance armor-grade composite materials. One of these new approaches is the so-called materials-by-design approach. Within this approach, extensive use is made of the computer-aided engineering (CAE) analyses and of the empirically/theoretically established functional relationships between an armor-grade composite-protected structure, the properties of the composite materials, material microstructure (as characterized at different length-scales) and the material/structure synthesis and fabrication processes. The paper aims to discuss these issues.

In the present work, a first step is made toward applying the materials-by-design approach to the development of the armor-grade composite materials and protective structures with superior ballistic-penetration resistance. Specifically, CAE analyses are utilized to establish functional relationships between the attributes/properties of the composite material and the penetration resistance of the associated protective structure, and to identify the combination of these properties which maximize the penetration resistance. In a follow-up paper, the materials-by-design approach will be extended to answer the questions such as what microstructural features the material must possess in order for the penetration resistance to be maximized and how such materials should be synthesized/processed.

The results obtained show that proper adjustment of the material properties results in significant improvements in the protective structure penetration resistance.

To the authors’ knowledge, the present work is the first reported attempt to apply the materials-by-design approach to armor-grade composite materials in order to help improve their ballistic-penetration resistance.