510 research outputs found
Astronomy Without a Telescope
No full textCreated by author Nick Strobel, "Astronomy Notes" is an educational resource for introductory astronomy classes for undergraduates. This section describes: the celestial sphere, coordinate systems, the motion of the stars. There are also sections describing: time, the seasons, time zones, the phases of the moon, solar eclipses, lunar eclipses, and the motions of the planets
Jonathan Edwards : an introduction to his thought
No full textJonathan Edwards (1703–1758) has long been recognized as one of the preeminent thinkers in the early Enlightenment and a major figure in the history of American Christianity. In this accessible one-volume text, leading Edwards experts Oliver Crisp and Kyle Strobel introduce readers to the fascinating and formidable mind of Jonathan Edwards as they survey key theological and philosophical themes in his thought, including his doctrine of the Trinity, his philosophical theology of God and creation, and his understanding of the atonement and salvation. More than two centuries after his death, theologians and historians alike are finding the larger-than-life Edwards more interesting than ever. Crisp and Strobel’s concise yet comprehensive guide will help students of this influential eighteenth-century revivalist preacher to understand why.https://digitalcommons.biola.edu/faculty-books/1396/thumbnail.jp
The Ifo Industry Growth Accounting Database
No full textIn this paper we present a new database that allows deep industry-level growth accounting from 1991–2003. The database allows for the first complete analysis of the German industry performance drivers based on the contributions of 12 asset types in 52 different industries. The industry sources of productivity and output growth are crucial to the understanding of the transformation of the German economy from manufacturing to information technology and service industries. The database enables researchers to develop an adequate picture of the sources of growth using standard growth accounting techniques. We formally document the new data series and its origins, with special focus on the capital stock and capital service data.growth accounting, industry productivity analysis
Germany’s Continued Productivity Slump: An Industry Analysis
No full textUS productivity growth surged twice post 1995 and post 2000. In contrast Germany registered two successive productivity reductions during that same period of time. Previous analysis of the post-2000 decline has been limited, however, by the short time series of the available data. In this paper we extend the Ifo Industry Growth Accounting Database that provides detailed industry-level investment information up to 2004. While much attention has focused on the reduction in German labor hours, our post-2000 data shows that a fledgling recovery in German non-ICT investment was offset by a widespread collapse in German total factor productivity. Almost half of German industries (accounting for over 45 percent of German output) did not experience positive TFP growth post 2000. Industries that constitute over a quarter of Germany’s value-added exhibited negative labor productivity growth during the same period. The negative German productivity trend is thus continuing, which accelerates the country’s departure from the productivity frontier.Growth accounting, industry productivity analysis, information and communication technology
In situ study of hydrogen silsesquioxane dissolution rate in salty and electrochemical developers
No full textIn order to better characterize the development of the electron-beam resist hydrogen silsesquioxane (HSQ), the authors used a quartz crystal microbalance (QCM) to study its rate of dissolution in situ. The authors determined the effect of both salt concentration and applied electric potential on the development rate of HSQ. The development rates were measured by spinning HSQ directly onto a quartz crystal resonator, and then developing in a QCM microfluidic module. In order to more directly observe the effect of electric potentials on the HSQ development rate, a film of HSQ was partially cross-linked in an O2 plasma asher and then developed in the QCM flow module with a salt-free NaOH solution. As the partially cross-linked HSQ slowly developed, electric potentials were applied and removed from the crystal allowing the observation of how the development rate increased upon the application of a positive electric potential. The increased development rate caused by both the addition of salt ions and a positive electric potential suggests that the rate may be limited by a build-up of negative charge on the HSQ.QN/Quantum NanoscienceApplied Science
Structure and density of Callisto’s atmosphere from a fluid-kinetic model of its ionosphere: Comparison with Hubble Space Telescope and Galileo observations
No full textAbstractWe develop a model of the ionospheric electron population of Jupiter’s moon Callisto using a prescribed neutral atmosphere composed of O2, CO2 and H2O. A kinetic description of ionospheric suprathermal electrons coupled with a fluid description of ionospheric thermal electrons is well suited to jointly analyze and interpret observations of electron density and atmospheric UV emission. Accordingly, we calculate the electron energy distribution function at each point in the ionosphere by solving a coupled set of equations consisting of the Boltzmann equation for suprathermal electrons and the continuity and energy equation for thermal electrons. We assume a stationary balance between local sources and sinks of electrons and electron energy. Electron transport within the ionosphere is neglected, since collision time scales are shorter than transport time scales in the region of Callisto’s ionosphere where the major concentrations of electrons is located and the major part of the atmospheric UV emission is generated. We consider photoionization, which is the dominant ionospheric electron source, and secondary ionization from collisions of photoelectrons with neutrals. Our calculations yield electron densities and electron impact generated UV emissions from Callisto’s atmosphere. Comparing our modeled UV emission intensities with the Hubble Space Telescope observation of Cunningham et al. (2015) , we find that Callisto’s atmosphere has a mean O2 column density of 2.1−1.1+1.1×1019 m−2. A joint comparison with this HST observation and radio occultation observations of Kliore et al. (2002) shows that Callisto’s atmosphere possesses a day night asymmetry. We derive terminator O2 column densities of ∼ 0.4 × 1019 m−2, for which we find subsolar O2 column densities in the range of 2.4−9.8×1019 m−2. Our calculations also show that the electron density is very sensitive to the relative abundance of H2O due to the thermal electron cooling by rotational state excitation of H2O. For the efficiency of Callisto’s atmospheric UV emission we find that on average one photon is emitted at OI λ135.6 nm per every 170 electron ion pairs generated and per every 60 electron ion pairs produced by secondary electron impact ionization
Educational standards, teacher preparation, and metacognition instruction for elementary students: Studies in pre-college engineering education
No full textThis dissertation is a compilation of three separate works representing a wide range of issues related to pre-college engineering. Each work addresses multiple levels of concern for educators from national policy to specific classroom intervention. Although presenting different styles of writing—due to different journals requirements—and various methods of research, all purpose to further research and instruction in pre-college engineering. The research detailed in these papers has been inspired by the current STEM (science, technology, engineering, and mathematics) education movement and in particular, by the National Academy of Engineering\u27s leadership in promoting the integration of engineering into pre-college classrooms (National Research Council, 2010, 2011). Combining the three studies into one dissertation provides a broad view of pre-college engineering and demonstrates the diversity of relevant methodological approaches. It also demonstrates the importance of looking at education as a complex system of people, policies, and curricula when putting research into practice. Primarily, the research and practice of instructional design depends on a cycle of design, teaching, and evaluation. The three pieces of this work represent each of these phases. Chapter 1 provides: a) discussion of how these studies connect to demonstrate instructional design and research competencies under the shared context of pre-college engineering, and b) an overview of each study. Chapter 2, Engineering in the K-12 STEM Standards of the 50 U.S. States: An Analysis of Presence and Extent (Carr, Bennett, & Strobel, 2012), was published in the July 2012 issue of The Journal of Engineering Education, the premier peer-reviewed international journal devoted to research on engineering education at all levels. The content analysis of educational standards from all 50 U.S. states found engineering in the standards of 41 states, and analysis of those standards resulted in a list of Big Ideas of doing engineering in the pre-college classroom. Chapter 3, A Design Case: Design and Integration of Engineering Curriculum for Secondary Teachers and Researchers , is in journal-ready format for a journal that exclusively features instructional design cases. The case follows the design process of graduate level course from the start of the project through two iterations and details the challenges, struggles, and decisions made to overcome them. The implementation outcomes showed improvement through the iterations and has provided the foundation for other professional development and teacher preparation courses. Chapter 4, Design and Study of MCinEDP: Metacognition for Reflective Design in Pre-College Engineering, is an evaluation study and design case of instruction designed for elementary school students participating in engineering design activities. The results of the evaluation and analysis of the implementation inform further modifications of the intervention and encourage further research. To conclude, Chapter 5 summarizes the outcomes of the studies and their effects on the author and his place in the research community
Surdos: vestígios culturais não registrados na história
No full textTese (doutorado) - Universidade Federal de Santa Catarina, Centro de Ciências da Educação. Programa de Pós-Graduação em EducaçãoA presente pesquisa consiste em um estudo empregando procedimento das análises narrativas e pesquisas teóricas etnografias que possibilitou a coleta de dados sobre a cultura do povo surdo. Nas análises narrativas possibilitou a reflexão sobre as práticas ouvintistas nas escolas de surdos e resistências do povo surdo contra esta prática, procurando resgatar a cultura surda na história. Nas pesquisas teóricas observou-se o papel fundamental da língua de sinais, o reconhecimento da cultura surda e a construção de sua identidade. Estas metodologias ressaltam a importância da participação dos povos surdos para a construção da história cultural. A tese é escrita num conjunto de textos no estilo acadêmico e estilo ensaio ao mesmo tempo, para deixar emergir os saberes onde entram em cena as memórias das experiências do #ser surdo#, uma visão abrangente em relação ao que ocorre com o povo surdo, especialmente, no campo do colonialismo e dos sistemas opressivos educacionais e dos corpos amordaçados por políticas institucionais. Ao usar o tom ensaístico da escrita, as fronteiras estilísticas estão dialogando em universo que é marcado pela negociação de sentidos, as linguagens que são marcadas por diferentes nuances e muitos elementos que são da ordem também das articulações de uma ordem de linguagem que emerge das instâncias analíticas da memória, da subjetividade e do inconsciente. Com essa pesquisa fazemos reflexões importantes acerca da violência simbólica e física a que os surdos foram sujeitados, traz o papel da família para um campo reflexivo de sua participação, o papel do psicólogo, o papel do professor, entre outros. This research is a study using narrative analysis and theoretical ethnographic research that led to the collection of data on the culture of deaf people. The narrative analysis enabled the reflection about practices in schools listeners of the deaf and deaf people's resistance against this practice, trying to rescue deaf culture in the history. In theoretical research it was found the key of the sign language, the recognition of deaf culture and the construction of their identity. These approaches emphasize the importance of participation of deaf people for the construction of cultural history. The theory is a set of texts written in academic style and style test at the same time, to leave the emerging knowledge comes into play where the memories of the experiences of 'being deaf', a comprehensive view on what happens with deaf people, especially in the field of colonialism and the oppressive educational systems and bodies muzzled by institutional policies. By using the tone of essayist writing, the stylistic borders are talking in a universe that is marked by way of negotiation, the languages that are marked by different shades and many elements that are of the order of the joints, an order of language that emerges from bodies analysis of memory, the subjectivity and the unconscious. With this research we will make important observations about the physical and symbolic violence that the deaf were subject, the role of the family brings to a field reflective of their participation, the role of psychologist, the role of teacher, among others
Neurotensin receptors in pancreatic ductal carcinomas.
No full textBACKGROUND
The frequent expression of neurotensin receptors (NT-R) in primaries of pancreatic ductal carcinomas has triggered the development of radioactive neurotensin analogs for possible in vivo targeting of these tumors. However, the complete lack of information regarding NT-R in liver metastases of pancreatic cancer and pancreatic intraepithelial neoplasia (PanIN) makes an in vitro study of NT-R in these tissues indispensable.
METHODS
Using in vitro receptor autoradiography with (125)I-[Tyr(3)]-neurotensin, NT-R were investigated in 18 primaries and 23 liver metastases of pancreatic ductal carcinomas as well as in 19 PanIN lesions.
RESULTS
We report here that 13 of 18 ductal carcinoma primaries and 14 of 23 liver metastases expressed NT-R. Moreover, none of the six PanIN 1B cases expressed NT-R, while two of six PanIN 2 and five of seven PanIN 3 expressed NT-R. Binding was fully displaced by the type 1 NT-R-selective antagonist SR48692, indicating that the NT-R in the tumors are of the type 1 NT-R subtype.
CONCLUSIONS
These in vitro data extend the currently available information on NT-R in invasive and non-invasive pancreatic ductal tumors. They suggest that type 1 NT-R may be a novel, specific marker of PanIN of higher degree. The high expression of NT-R in primaries and metastases of invasive cancer strongly support the need to develop radioactive neurotensin analogs for the diagnosis and therapy of this tumor type
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