Orientation-dependent pseudomorphic growth of InAs for use in lattice-mismatched mid-infrared photonic structures

In this study, InAs was deposited on GaAs (100) and GaAs (111)B 2 degrees towardssubstrates for the purpose of differentiating the InAs growth mode stemming from strain and then analyzed using in-situ reflection high energy electron diffraction, scanning electron microscopy, Raman spectroscopy, reflectance spectroscopy, and atomic force microscopy. The procession of InAs deposition throughout a range of deposition conditions results in assorted forms of strain relief revealing that, despite lattice mismatch for InAs on GaAs (approximately 7%), InAs does not necessarily result in typical quantum dot/wire formation on (111) surfaces, but instead proceeds two-dimensionally due primarily to the surface orientation

New Colonialism in Developmental Aid

Conventional wisdom suggests United States’ economic foreign aid is wasted and should be cut. In challenging this conventional wisdom, I argue that though there is potential for good through foreign aid, bilateral aid programs like that of the Forum on China-Africa Cooperation resemble neo-colonialism. This paper examines international aid’s effects on establishing debt traps, promoting exploitation, and reinforcing hierarchy. Through analysis of primary and secondary evidence, including but not limited to UNCTAD and WWF-SIGHT reports, I look at how the effects of international aid contribute to the sovereignty of the recipient countries. My findings reveal that though Chinese international aid and investment has creates several positive short-term changes in African economies, these advances come with a cost. Due to a lack of regulations on aid-based development projects, powerful countries are allowed to take advantage of both the recipients’ natural resources and political sovereignty

Expeditionary Learning: Mi vida en perspectiva

This work outlines and supports the use of Expeditionary Learning to help 8th grade Spanish 1 students to understand mental and emotional health. Outlined is a single In-depth Investigation plan (IDI) that walks through the activities, experts, and service the students will be participating in, in order to learn about mental and emotional health

The Relationship Between Perceived Overqualification and Job Attitudes and Behaviors: The Moderating Role of Psychological Empowerment

It has been shown that employees who perceive to be overqualified in their roles are more likely to display negative attitudes and behaviors; however, little attention has been paid to the possible moderators of this relationship. Therefore, the present study proposed that psychological empowerment would moderate the relationship between perceived overqualification and job attitudes (affective commitment and careerist attitudes) and behaviors (counterproductive work behaviors). It was hypothesized that the relationship between perceived overqualification and these job attitudes and behaviors would be weaker for employees with higher levels of psychological empowerment than for employees with lower levels of psychological empowerment. Results from a self-report survey of 138 employed individuals showed that psychological empowerment moderated only the relationship between perceived overqualification and counterproductive behaviors. Results also showed that perceived overqualification was negatively related to affective commitment and careerist attitudes, regardless of levels of psychological empowerment. Consistent with past findings, these results suggest that the negative consequence of overqualification on counterproductive behaviors is avoidable and emphasize the importance of person-job fit in hiring employees in order to reduce the negative outcomes of perceived overqualification

THE MENTOR IN YOU:EXPECTED AND RECIEVED STUDY ABROAD PREPARATION

When you think of studying abroad, visions of exotic locations and wild adventures come to mind. However, have you ever thought about the process before going abroad? This study examines the steps and programs offered to a student before going abroad. The research process involved examining existing literature about the study abroad process and what programs are offered at Illinois State University. Two interviews were conducted with students who have already studied abroad and one interview with a student who is about to study abroad. Further investigation included reviewing blogs and examining the data through narrative analysis. The research findings concluded that the mentor needs mentorship and the study abroad program repeats the same information from past events

Spectroscopy studies of straincompensated mid-infrared QCL active regions on misoriented substrates

In this work, we perform spectroscopic studies of AlGaAs/InGaAs quantum cascade laser structures that demonstrate frequency mixing using strain-compensated active regions. Using a three-quantum well design based on diagonal transitions, we incorporate strain in the active region using single and double well configurations on various surface planes (100) and (111). We observe the influence of piezoelectric properties in molecular beam epitaxy grown structures, where the addition of indium in the GaAs matrix increases the band bending in between injector regions and demonstrates a strong dependence on process conditions that include sample preparation, deposition rates, mole fraction, and enhanced surface diffusion lengths. We produced mid-infrared structures under identical deposition conditions that differentiate the role of indium(strain) in intracavity frequency mixing and show evidence that this design can potentially be implemented using other material systems

Pseudomorphic growth of InAs on misoriented GaAs for extending quantum cascade laser wavelength

The authors have studied the impact of epilayer strain on the deposition of InAs/GaAs on (100) and (111)B with 2 degrees offset toward 2-1-1 surfaces. Consequences of a 7% lattice mismatch between these orientations in the form of three-dimensional growth are less apparent for (111)B with 2 degrees offset toward 2-1-1 surfaces compared to (100). By exploring a range of molecular beam epitaxy process parameters for InAs/GaAs growth and utilizing scanning electron microscopy, atomic force microscopy, and Raman spectroscopy to evaluate the quality of these strained layers, the authors develop empirical models that describe the influence of the process conditions in regards to surface roughness with \u3e92% accuracy. The smoothest InAs/GaAs samples demonstrated average surface roughness of 0.08 nm for 10 um-squre areas, albeit at very low deposition rates. The authors have found the most important process conditions to be substrate temperature and deposition rate, leading us to believe that controlling diffusion length may be the key to reducing defects in severely strained structures. InGaAs/AlGaAs quantum cascade laser structures were also produced on (111)B with 2 degrees offset toward 2-1-1 to take advantage of the piezoelectric effect, and the modified laser transitions due to these effects were observed

Are U.S. Congregations Patching the Social Safety Net? Trends from 1998 to 2012

As social services become increasingly privatized amid a federal policy environment that provides a means-tested, temporary social safety net, there is potential for a larger contribution by congregations as social service providers. Using data from a nationally representative sample of religious congregations collected in 1998, 2006, and 2012, we examine whether congregations have increased service activity over time, and whether provision varies by the congregation’s community-level context. We find that post-Great Recession, congregations are more likely to engage in broad social services and in “core” services that address basic economic needs. Congregations in high-poverty neighborhoods were less likely to provide services in 1998 than congregations in low-poverty neighborhoods; after the recession, not only are significantly more congregations in high-poverty neighborhoods providing services than in 1998, they have closed the gap with congregations in low-poverty neighborhoods and are equally likely to be providing any services regardless of neighborhood poverty. Our findings highlight the importance of service measurement to determine the prevalence of congregation-level service provision and suggest that congregational service provision may be a substantial yet inadequate substitute for the public safety net

Counselor Self-Reported Competence for Working with Kink Clients: Clinical Experience Matters

The experience of counselor stereotyping, bias, and misunderstanding is often very real for those who participate in adult, consensual, non-diagnosable paraphilic sexuality, commonly referred to as kink. A created Counselor Self-Reported Competency Scale, drawn from American Counseling Association competencies, and the Attitudes about Sadomasochism Scale were used to assess counselor knowledge and attitude for working with kink clients. This research suggests competence with kink clients increases as clinical experience working with kink clients increases. The ability to maintain a nonjudgmental attitude and open therapeutic environment seems linked to increased clinical experience with this sexual subculture