149 research outputs found
Protest camps: An emerging field of social movement research
No full textRecently protest camps have emerged around the world as a highly visible form of protest. Part and parcel of new social movement activism for over 40 years, they are important sites and catalysts for identity creation, expression, political contention and incubators for social change. While research has punctually addressed individual camps, there is lack of comparative and comprehensive research that links historic and contemporary protest camps as a unique area of interdisciplinary study. Research on the phenomenon to date has remained punctual and case based. This paper proposes to study protest camps as a distinct new field of research in social movement studies. Existing literature is critically reviewed and framed in three thematic clusters of spatiality, affect and autonomy. On the basis of this review the paper develops a research approach based on the analysis of infrastructures used to make protest camps. We contest that an infrastructural analysis highlights protest camps as a unique organizational form and transcends the limits of case-based research while respecting the varying contexts and trajectories of protest camps
Webinar: Electronics Technology
No full textThis webinar, provided by the Maricopa Advanced Technology Education Center (MATEC), was presented on September 20 2013. Louis Frenzel, noted author and editor of Electronic Design News, gives an overview of the ultra-current trends and technologies that are driving the industry today. Applications involving wireless, mobile, computers and the green influence on electronic technologies are covered. Frenzel then discusses how colleges are dealing with and educating their students to keep up with these trends in technology. This webinar is accompanied by a corresponding handout and webinar slides.The webinar is one hour and 31 minutes in length
Byproduct-to-host ratios for assessing the accessibility of mineral resources
No full text<p>This repository contains the supplementary information files of the article "Byproduct-to-host ratios for assessing the accessibility of mineral resources", submitted to Environmental Sciences & Technology.</p>
<ul>
<li>"SI_1_BtH_ratios_v0.1.xlsx" contains both input data and results of the article</li>
<li>"SI_2_Historic_prices.xlsx" contains the historical market price of mineral resources covered in the study</li>
<li>"SI_3_Representavity_dataset.xlsx" containts the dataset required to evaluate the representativity of the dataset with regards to alternative estimates in the literature</li>
<li>"SI_4_RR_LitReview.xlsx" show the data collected during the literature review of minerals recovery rates along global supply chains</li>
<li>"SI_5_Production_2021.xlsx" provides the primary production of minerals in 2021</li>
<li>"SI_6_Host_byproduct_Greffe2024.docx" provides additional information on the methodology and data collection</li>
<li>"SI_7_Representativity_results.xlsx" contains the output results of the representativity check, using data from supporting information 1 and supporting information 3</li>
</ul>
<p>BtH ratios are obtained using "ResC" data in "SI_1_BtH_ratios_v0.1.xlsx" and using the byproduct_host_ratio python class available at: https://github.com/TitouanGreffe/BtH_ratios</p>
Exergetical evaluation of biobased synthesis pathways
No full textThe vast majority of today’s chemical products are based on crude oil. An attractive and sustainable alternative feedstock is biomass. Since crude oil and biomass differ in various properties, new synthesis pathways and processes have to be developed. In order to prioritize limited resources for research and development (R & D), their economic potential must be estimated in the early stages of development. A suitable measure for an estimation of the economic potential is based on exergy balances. Different structures of synthesis pathways characterised by the chemical exergy of the main components are evaluated. Based on a detailed evaluation of the underlying processes, general recommendations for future bio-based synthesis pathways are derived.Values, Technology and InnovationTechnology, Policy and Managemen
Data from: A 3D Analysis of Dendritic Solidification and Mosaicity in Ni-Based Single Crystal Superalloys
No full textAuthor: F. Scholz, M. Cevik, P. Hallensleben, P. Thome, G. Eggeler, J. Frenzel
Affiliation: Ruhr University Bochum
Date: 08/2021
Material: Nickel-base superalloy ERBO/1 (more details: Parsa, A. B., et al. Advanced scale bridging microstructure analysis of single crystal Ni-base superalloys. Adv. Eng. Mater. 2015, 17 (2), 216-230, https://doi.org/10.1002/adem.201400136)
Casting: Bridgman seed technique; Withdrawal rate: 180 mm/h, Thermal gradient 13.3 K/mm (more details: Hallensleben, P., et al. On the evolution of cast microstructures during processing of single crystal Ni-base superalloys using a Bridgman seed technique, Mat. Des. 2017, 128, 98–111, https://doi.org/10.1016/j.matdes.2017.05.001)
Sample: Cross sectional slices extracted perpendicular to the growth direction of a single crystal superalloy cylinder (diameter 12mm, length 120 mm).
Image acquisition: Optical microscope of type Axio (Carl Zeiss GmbH) equipped with a high-resolution CCD-camera of type Leica DFC320 and stepper-motor driven sample stage of type Tango Desktop (Märzhäuser)
Image pre-processing: Preparation of wide-field image collages using the stitching procedures implemented in software package Imagic ims (https://imagic.ch/en/imagic-ims, 07/2021)
Image post-processing: Image registration with CorelDraw X7 (: https://www.coreldraw.com/en/, 07/2021) using a contour reference mask
Quantitate analysis: Dendrite positions were extracted using the software package ImageJ (https://imagej.de.softonic.com/, 07/2021).
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The five optical micrographs cross sections represent image data which were obtained by tomographic characterization of as-cast single crystal nickel-base superalloy prepared by a seeded Bridgman technique. The material has been studied in the frame of the collaborative research center SFB/TR 103. All details on the applied Bridgman technique are described in the literature (Hallensleben, P., et al., Mat. Des. 2017, 128, 98–111, https://doi.org/10.1016/j.matdes.2017.05.001 and Hallensleben, P., et al., Crystals 2019, 9 (3), 149, https://doi.org/10.3390/cryst9030149). The tomographic image slices were prepared by successive electro discharge machining using incremental steps of 1mm. The image series represents the evolution of dendritic microstructures during the early stages of crystal growth from the back melted seed. The five wide-field micrographs were used to retrieve dendrite positions (enclosed as CSV data for each cross section) to evaluate crystal mosaicity on the basis of dendrite growth directions. All information and a detailed interpretation of tomographic are available in (Scholz, F., PhD-thesis, Ruhr University Bochum, https://doi.org/10.13154/294-8079). We hope that our image data will be useful for other types of solidification research. Please provide a notification by personal mail on the re-use of our raw data. Thank you.
All images and dendrite position data were evaluated in the following study concerning dendrite growth behavior, low angle misorientation defects, dendrite arrangements and spacings:
Scholz, F.; Cevik, M.; Hallensleben, P.; Thome, P.; Eggeler, G.; Frenzel, J. A 3D Analysis of Dendritic Solidification and Mosaicity in Ni-based Single Crystal Superalloys, Materials 2021, 14 (17), 4904 (https://doi.org/10.3390/ma14174904)
Poverty, class, and tourism : from seeing poverty to modern philanthropy, social policy, and antipoverty activism
No full textTourism’s relationship to poverty and class is multifaceted and has changed over time. Tourism is a
social phenomenon in which class and poverty often become apparent and are sometimes negotiated.
In this chapter, the author focuses on a certain aspect of the relationship between tourism and class,
namely tourism’s role in enabling and underpinning the politics of class and poverty. Using the context
of Victorian slumming as an empirical backdrop, the chapter discusses three aspects of the politics of
class in tourism: (1) the relationship of knowledge and class in tourism, with tourism producing but
also obscuring knowledge; (2) the relationship of tourism and inequality, interrogating how tourism
enables claims making in contexts of inequality; and (3) the role of free time for political action,
investigating how the availability of free time and space has enabled the formation of class-based
politics. The chapter contributes to better understanding the role of tourism in political and classbased action, a role not widely acknowledged in political history and social movement studies
Beeinträchtigung junger Schlaganfallpatienten durch Schmerzen nach cerebrovaskulärem Ereignis: Alters- und geschlechtsspezifische Unterschiede auf Grundlage der „Stroke in Young Fabry Patients Study“ (sifap1)
No full textDie Auswertung des Brief Pain Inventory der "Stroke in young fabry patients study (sifap1") legt nahe, dass weibliche Patienten und auch junge Betroffene zu den Risikogruppen zählen, die nach erlittenem cerebrovaskulärem Insult vermehrt Beeinträchtigungen durch ihre Schmerzen erfahren. Das Ergebnismuster lässt die Schlussfolgerung zu, dass sich dies nicht auf rein physische Defizite bezieht, sondern auch durch psychische Probleme bergründet werden kann
The Belt and Road Initiative: A Driver for Securitization in China’s Xinjiang Uyghur Autonomous Region?
No full textIn recent years, the province of Xinjiang in northwest China has increasingly developed into a 'security state' in which Muslim minorities, especially the Uyghurs, are objects of State arbitrariness, discrimination and violence. Simultaneously, the region is of crucial importance for China's Belt and Road Initiative, which raises the question whether there is a linkage between the securitization of Xinjiang and the mega-project. This paper provides an analysis of the current securitization in Xinjiang and explores the relationship of the process to the Belt and Road Initiative. The author draws on the concept of the Copenhagen school for analyzing securitization and conducts a rapid literature review to collect, analyze and compare information on Chinese policies in Xinjiang. In conclusion, Xinjiang's securitization is not due to the Belt and Road Initiative, but rather reflects the efforts of the People's Republic to construct a unified (Han-)Chinese State.In der MLU Human Geography Working Paper Series werden in unregelmäßigen Abständen aktuelle humangeographische Forschungsergebnisse des Instituts für Geowissenschaften & Geographie der Martin-Luther-Universität Halle-Wittenberg in deutscher und englischer Sprache veröffentlicht
Boredom due to being over- or under-challenged in mathematics: A latent profile analysis
No full textSchwartze MM, Frenzel AC, Goetz T, et al. Boredom due to being over- or under-challenged in mathematics: A latent profile analysis. British Journal of Educational Psychology. 2024.BACKGROUND: Recent research on boredom suggests that it can emerge insituations characterized by over- and under-challenge. In learning contexts, this implies that high boredom may be experienced both by low- and high-achieving students.; AIMS: This research aimed to explore the existence and prevalence of boredom due to being over- and under-challenged in mathematics, for which empirical evidence is lacking.; SAMPLE: We employed a sample of 1.407 students (fifth to ninth graders) from all three secondary school tracks (lower, middle and upper) in Bavaria (Germany).; METHODS: Boredom was assessed via self-report and achievement via a standardized mathematics test. We used latent profile analysis to identify groups characterized by different levels of boredom and achievement, and we additionally examined gender and school track as group membership predictors.; RESULTS: Results revealed four distinct groups, of which two showed considerably high boredom. One was coupled with low achievement on the test (i.e. 'over-challenged group', 13% of the total sample), and one was coupled with high achievement (i.e. 'under-challenged group', 21%). Furthermore, we found a low boredom and high achievement (i.e. 'well-off group', 27%) and a relatively low boredom low achievement group (i.e. 'indifferent group', 39%). Girls were overrepresented in the over-challenged group, and students from the upper school track were underrepresented in the under-challenged group.; CONCLUSION: Our research emphasizes the need to openly discuss and further investigate boredom due to being over- and under-challenged. © 2024 The Author(s). British Journal of Educational Psychology published by John Wiley & Sons Ltd on behalf of British Psychological Society
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