Injection conditions for lunar trajectories

Earth-Moon trajectory mechanics analysis affected by geometric and booster vehicle consideration

Steps to an Acceptable Image - Part II

Reprinted from the book Normal Neurosis by Drs. Snell and Gail Putney

An economic analysis of a commercial approach to the design and fabrication of a space power system

A commercial approach to the design and fabrication of an economical space power system is presented. Cost reductions are projected through the conceptual design of a 2 kW space power system built with the capability for having serviceability. The approach to system costing that is used takes into account both the constraints of operation in space and commercial production engineering approaches. The cost of this power system reflects a variety of cost/benefit tradeoffs that would reduce system cost as a function of system reliability requirements, complexity, and the impact of rigid specifications. A breakdown of the system design, documentation, fabrication, and reliability and quality assurance cost estimates are detailed

The Sustainable Restoration and Development of Parque Landeta and the Presa de Las Colonias Wetland Through Effective Community Participation, San Miguel de Allende, Guanajuato, Mexico

Community participation in watershed management has been globally recognized as being one of the key elements in sustainable development. The appropriateness of adopted technologies, information transfers, socioeconomic and cultural sustainability, and monitoring and maintenance of water projects are all interconnected with the level of community participation. This professional project presents an analysis and recommendations for the sustainable development of a local park and its associated wetland resources through effective, relative and meaningful community involvement. Parque Landeta is found just outside the urban zone of San Miguel de Allende, Guanajuato, which is located in the semi-arid Central Highlands of Mexico. Qualitative and quantitative data was collected through interviews with actively participating stakeholder organization board members and staff. In addition, a total of 109 residents, park visitors and local students were surveyed by volunteer high school students and qualified facilitators in order to evaluate the community dynamics, perceptions, needs, and participatory interests in the Parque Landeta project. The results show that there exists an overall genuine interest in project participation and environmental education initiatives. However, there are socioeconomic and gender constraints that may deter traditional\u27 forms of involvement in the wetland restoration and park activities, such as the need for spousal permission to engage in community movements. Personal observations and research results show that there is no general recipe for community participation in water resource projects and each should be viewed on a case-by-case basis. Varying forms of relative, empowering and appropriate participation exist for each stakeholder group in the Parque Landeta project. Participation will most likely be in the form of park visitation, general care and support for the park\u27s natural resources, and outreach and environmental education programs. Moreover, it is imperative that active stakeholders in this wetland restoration-park project design proposals that define their intentions, responsibilities, levels of commitment, funding sources and expected benefits. Through open communication and transparency between the City authorities and active stakeholder organizations, the planning, development and monitoring phases will become more organized and predictable. This process will attract additional stakeholders to the Parque Landeta project

Getting to the heart of the matter: Understanding relational satisfaction in modern-day couples

This mixed-methods study is the first of its kind to collect large-scale qualitative and quantitative data from diverse couples. The purpose of the research was to determine what factors (Internal, Relational, or External) most impact relational satisfaction in modern-day couples. Four hundred fifty three participants that represented diverse sexual orientation, age, social economic status, and relational commitments were asked to answer a survey that contained Likert-like scales and open-ended questions to identify what factors most influence their relational satisfaction. The answers were coded and grouped into internal, relational, and external factors. Rich descriptions of the qualitative results are included. The qualitative data were also transposed into numerical representations to identify statistical differences and correlations between groups. The researcher identified a few significant and potentially significant demographic factors that merit further investigation including: gender, sexual orientation, parental status, commitment level, relationship status, and length of relationship. The qualitative factors found to significantly or practically significantly (small but notable effect sizes) impact relational satisfaction include: Infidelity, Religion/Morals, Parenting, Commitment/Hard Work, Communication, Domestic, Compatibility, Work/Time, Emotional Support, Finances, Extended Family, Friends, Stress/Trials, Addictions/Recovery, Social/Community Support, and Health/Aging. A new framework for understanding the key ingredients of relational satisfaction is proposed. These ingredients include: Trust, Safety, Stability/Security, Connection/Support, and the degree to which the couples perceived their expectations were being met in these areas. Application of Attachment Theory helped explain some of the findings. Implications for assessment of relational satisfaction and future research are discussed

A Study Of Digital Communication Tools Used In Online High School Courses

The purpose of this study was to determine the degree to which selected communication tools used by teachers who teach online are positively perceived by their students in improving feelings of self-efficacy and motivation, and which tools may be perceived to be significantly more effective than the others. Students from the Florida Virtual School, a leader in online course delivery for grades 6-12, were surveyed to find their perceptions about how their teachers\u27 use of email, Instant Messaging, chat, the telephone, discussion area, whiteboard, and assignment feedback affected their motivation and success in an online high school course. Correlations were done to discover if there were any significant relationships between variables that relate to teacher interaction and motivation. In addition, distributions of student responses to survey questions about digital communication tools and demographics were examined. It was found that there is a high degree of correlation between frequency of teachers\u27 use of digital communication tools and student\u27s perception of their level of motivation. It was also found that the digital communication tools most frequently used by teachers in communicating with their students were email, the telephone, and assignment feedback, and that the students found these same tools the most helpful in their learning. In addition, no significant demographic differences were found in students\u27 perception of teacher\u27s use of tools to enhance learning and motivation in their courses except in the number of previous online courses taken. These findings can help direct online high school teachers in their selection of digital tools used to communicate with their students

Long read: Trump’s threats of violence against protestors reflect a racist order defined by nationalism in US history

This week, in reaction to the unfolding protests across the US in the wake of the killing of George Floyd during his arrest in Minneapolis, Minnesota, President Trump likened the unrest to ‘domestic terror’, and vowed to ‘dominate the streets’. Christopher Putney writes that Trump’s rhetoric is the latest expression of a racial order that has been ever-present in American political development, and always defined Blacks and other people of color as a threat to a white ethnonational identit

The integration of physics in the human ecology course at Boston University School of Nursing.

Thesis (M.S.)--Boston Universit