Rendezvous requirements and candidate worst case flights from the October 1973 space shuttle traffic model

Data appearing in the October 1973 space shuttle traffic model were analyzed to determine the rendezvous requirements for the proposed shuttle flights occurring between 1980 and 1991. Four families of flights have been identified, namely, single-payload rendezvous, multiple-payload rendezvous, payload and tug rendezvous, and tug only rendezvous. Charts have been prepared which summarize the respective data. Observations are presented for each of the four flight families, and worst case flights are proposed from each family for further analysis

Intercept missions to asteroid Eros in 1974 and comet D'arrest in 1976

Intercept trajectories to asteroid Eros in 1974 and comet De Arrest in 197

Report of Investigations No. 141 Hydrogeology of the Edwards Aquifer, Austin Area, Central Texas

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Autres familles d’acariens prédateurs d’acariens

- Stigmaeidae- Anystidae- Cheyletidae- Bdellidae- Cunaxidae- Erythraeidae- Tydeida

PBIS Social Culture in an Alternative Education Setting: What Do Students Know About Their Language, Experiences, and Values?

School discipline and safety has been an ongoing concern in the United States, as well as statistics about the students that are affected by these concerns. Extreme programming such as zero tolerance has created a pathway for students with safety concerns and disruptive behaviors toward alternative education programs. Unfortunately, simply removing students from public schools has not extinguished the undesired behaviors, but may actually increase more severe and frequent discipline problems, as well as restricted these students from needed and accessible programs. While PBIS in Alternative Education (AE) settings has encouraging outcomes, little research is available in these settings where the most severe behavioral needs exist. More specifically, the nature of these schools is to support students who have generally failed in traditional settings because of their mental health or disability, aggressive behavior, and low academic achievement. This exploratory qualitative study examined the approach used to develop a pro-social culture in an alternative special education school for children with emotional and severe behavioral disabilities. A secondary purpose was to understand the student perspective of their social culture and social competence, identifying what students know about their common language, experiences, and values in the PBIS approach. The tentative findings of this study describe that a PBIS approach is a complex system and when implemented with fidelity, can be effective in developing a prosocial culture and school climate that reflects norms, values, perceptions of safety, and interpersonal relationships in an alternative special education setting. Additional findings may suggest that in a PBIS approach, social competence is the knowledge that all students know the rules and expectations and adherence to those conditions may affect the relationships between students and teachers. Students in this setting have demonstrated social competence, meaning they can learn the knowledge and skills to value the common language and behaviors across school settings. While students learn the language and behaviors to access extrinsic rewards, developing moral character also appears to have importance, as students’ feelings of self-fulfillment shift the focus from extrinsic rewards to intrinsic motivation of valuing the PBIS social culture. As an indicator of the prosocial culture and school climate, students appear to create deep meaning of the PBIS social culture by means of their impression of themselves in the school community

Nominal profile refinements report: Targets in 150 and 190 nautical mile circular orbits

Refinements for 150 and 190 n.mi. circular target orbits were examined along with the potential advantages of ground-hold as a means of reducing the phasing times associated with low orbit rendezvous

First record of Penthalodes ovalis (Dugès, 1834) in agricultural area with notes on its pest status (Acari: Penthalodidae)

The first record of species Penthalodes ovalis (Dugès, 1834) in agricultural habitat is presented in this paper. This is also the first record of the occurrence and damages on grown plants. The variability of the morphology and new data on the biology are given as well

Public-Private Partnerships for Social and Economic Transformation in Southern Africa: Progress and Emerging Issues

Attracted by prospects of overcoming public budget, human skills, technical and other constraints, Southern African countries are increasingly adopting public-private partnership (PPP) arrangements to deliver social and economic goods and services. However, most of these countries have yet to solidify the requisite legal, regulatory and institutional frameworks. This paper argues that PPPs have a potential to transform and improve the lives of the regions’ citizens if these basic frameworks are attended to forthwith

Vineyard colonisation by predaceous mites (Acari: Phytoseiidae) living in surrounding vegetation

The aim of this work was to study the colonization by phytoseiid mites living in neighboring uncultivated areas of a vineyard in the South of France. The experimental vine plot was co-planted with Sorbus domestica in a framework of agroforestery investigations. This study was carried out during 3 years (1999, 2000 and 2001) in a vine plot planted in 1997. Phytoseiid mites have been collected in cultivated and uncultivated areas surrounding the experimental plot. Dispersal of these mites into the plot has been studied using aerial traps. Phytoseiid mites have been observed in the surrounding cultivated and uncultivated areas. However, densities were quite low. Phytoseiid mites dispersed into the experimental plot, but low densi ties of mites have been caught. Nevertheless, these densities seemed to be sufficient to provide efficient biological control against phytophagous mites. Typhlodromus exhilaratus was the main species trapped. This species was also the main phytoseiid mite collected in the experimental vine field and on S. domestica trees. Densities of mites in the vine field have increased during the three years. Phytoseiid mites seemed to have successfully colonized the experimental vine plot, but Kampimodromus aberrans, the species usually collected in vineyards of South of France, was not the main species observed in this case. The reasons of this colonization process is discussed here