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In a search for very high density (n ≳ 107 cm−3) regions, the Millimeter Wave Observatory 5-m telescope was used to observe several submillimeter lines. The regions studied were Orion A, M17, S140, and NGC2024. The lines were CS(J=7-6), H2CO(JK-1K1=515→414), and HCN(J=4-3). These data are combined with data at millimeter wavelengths to derive the volume density and the results are compared to those deduced from millimeter lines alone (Snell et al. 1984). In NGC2024, higher densities (≳ 107 cm−3) are clearly indicated by the sub-mm lines than were derived by Snell et al. In M17, derived densities are also higher, but uncertainties overlap the Snell et al. solutions. The range of densities derived from CS and HCN are consistent. The sub-millimeter lines of these species appear to be good probes of the highest densities present in regions of active star formation.
There is a widespread assumption that the universe in general, and life in particular, is 'getting more complex with time'. This book brings together a wide range of experts in science, philosophy and theology and unveils their joint effort in exploring this idea. They confront essential problems behind the theory of complexity and the role of life within it: what is complexity? When does it increase, and why? Is the universe evolving towards states of ever greater complexity and diversity? If so, what is the source of this universal enrichment? This book addresses those difficult questions, and offers a unique cross-disciplinary perspective on some of the most profound issues at the heart of science and philosophy. Readers will gain insights in complexity that reach deep into key areas of physics, biology, complexity science, philosophy and religion.
Background: Cognitive behavior therapy (CBT) has been found to be generally effective for persons with schizophrenia. Less is known however about those who will engage in this treatment, and among those who engage, who benefits more versus less from this intervention. Aims: This study sought to identify factors associated with treatment engagement and response in persons with psychosis engaged in CBT focused on enhancing work function. Method: Participants were 50 adults with schizophrenia-spectrum disorders participating in a randomized control trial that offered both CBT and a protected employment position over 26 weeks. Survival analysis and discriminant analyses were used to analyze the data. Results: Results indicated that poor treatment engagement and engagement in work was associated with lower educational attainment, more severe baseline levels of negative symptoms, and lower baseline scores on the Arithmetic and Digit Symbol subscales of the WAIS-III. Amongst those participants who did engage, younger age and poorer working memory as assessed by the Arithmetic subscale predicted shorter initial job tenure. More severe levels of positive symptoms and lower self-esteem during the later stages of treatment were associated with worse employment outcomes across the study period. Conclusions: These findings evidence differential predictors of engagement and success and suggest that a subgroup of persons with schizophrenia engaged in CBT and a vocational placement are at risk for poor functional outcomes associated with psychological factors that evolve over time.