scholarly journals Assessment of serpulid-hydroid association through the Jurassic: A case study from the Polish Basin

PLoS ONE ◽  
2020 ◽  
Vol 15 (12) ◽  
pp. e0242924
Author(s):  
Jakub Słowiński ◽  
Dawid Surmik ◽  
Piotr Duda ◽  
Michał Zatoń
Keyword(s):  
Late Cretaceous ◽  
Upper Jurassic ◽  
Colonial Hydroids ◽  
Upper Bajocian ◽  
The Rich ◽  
Commensal Relationship ◽  
Lower Bathonian

The coexistence of sessile, tube-dwelling polychaetes (serpulids) and hydroids, has been investigated. Serpulid tubes bearing traces after hydroids are derived from different stratigraphic intervals spanning the Middle and Upper Jurassic, the rocks of which represent the diverse paleoenvironments of the Polish Basin. Although fossil colonial hydroids classified under the species Protulophila gestroi are a commonly occurring symbiont of these polychaetes during the Late Cretaceous and Cenozoic, they seem to be significantly less frequent during the Jurassic and limited to specific paleoenvironments. The hydroids described here are represented by traces after a thin stolonal network with elongated polyp chambers that open to the outer polychaete tube’s surface with small, more or less subcircular apertures. Small chimney-like bulges around openings are an effect of the incorporation of the organism by in vivo embedment (bioclaustration) within the outer layers of the calcareous tube of the serpulid host. Considering the rich collection of well-preserved serpulid tubes (>3000 specimens), the frequency of bioclaustrated hydroids is very low, with an infestation percentage of only 0.6% (20 cases). It has been noticed that only specimens of the genus Propomatoceros from the Upper Bajocian, Lower Bathonian, Middle Bathonian, and Callovian have been found infested. However, the majority of bioclaustrated hydroids (17 cases) have been recorded in the Middle Bathonian serpulid species Propomatoceros lumbricalis coming from a single sampled site. Representatives of other genera are not affected, which is congruent with previous reports indicating that Protulophila gestroi was strongly selective in the choice of its host. A presumably commensal relationship is compared with the recent symbiosis between the hydroids of the genus Proboscidactyla and certain genera of sabellid polychaetes.

Case study in 21 st century ecotoxicology: using in vitro aromatase inhibition data to predict short term in vivo responses in adult female fish

2020 ◽  
Author(s):  
Daniel L. Villeneuve ◽  
Brett R. Blackwell ◽  
Jenna E. Cavallin ◽  
Wan‐Yun Cheng ◽  
David J. Feifarek ◽  
...  
Keyword(s):  
Adult Female ◽  
Female Fish ◽  
Aromatase Inhibition ◽  
Short Term ◽  
Inhibition Data

Individualized Behavioural Treatment of Severe Stuttering

1991 ◽  
Vol 19 (4) ◽  
pp. 347-357 ◽  
Author(s):  
Willi Ecker ◽  
Victor Meyer
Keyword(s):  
Oral Reading ◽  
Reading Improvement ◽  
Behavioural Treatment ◽  
Communication Situations ◽  
Cognitive Techniques ◽  
One Year

This case study illustrates the reduction of severe stuttering by an individually tailored treatment programme. Interventions are derived from a tripartite analysis (Lang, 1971) and include EMG biofeedback, regulated breathing, exposure in vivo to stressful communication situations and cognitive techniques to reduce relapse risk. The role of dysfunctional response system interactions in stuttering is emphasized. Treatment resulted in a marked reduction of stuttering and associated facial contortions during videotaped conversations with strangers and oral reading. Improvement was maintained at one-year follow-up.

A Successful Adaptation of Systematic Desensitization in the Treatment of a Phobia of Babies

1985 ◽  
Vol 2 (1) ◽  
pp. 59-64
Author(s):  
Michael Free ◽  
Margaret Beekhuis
Keyword(s):  
Young Woman ◽  
Skin Conductance ◽  
Treatment Strategy ◽  
Physiological Measures ◽  
Systematic Desensitization ◽  
Physiological Measure ◽  
One Year

A case study is presented of a young woman with an unusual phobia, a fear of babies. Barabasz's (1977) technique of systematic desensitization using psycho-physiological measures was chosen as the main treatment strategy. Difficulties arose as the client was unable to visualise scenes involving babies. Nor could she look at photographs of babies long enough for the hierarchy to be ordered using a psycho-physiological measure (skin conductance). A set of photographs was eventually used for the hierarchy, but it was ordered in terms of the length of time the client could look at the various photographs. Systematic desensitization was carried out using the set of photographs instead of imaginary scenes, together with some in vivo exposure in the latter stages of treatment. At termination the client could approach babies without discomfort. Improvement was maintained at one year follow-up.

Power and Globalization in Africa: Perceptions of Barriers to Fair Economic Development in Kenya

2021 ◽  
Vol 20 (1-2) ◽  
pp. 77-97
Author(s):  
John Bosco Ngendakurio
Keyword(s):  
Economic Development ◽  
World Order ◽  
Global Market ◽  
Language And Culture ◽  
Poor Countries ◽  
Face To Face ◽  
The World ◽  
The Rich ◽  
First World

Abstract This article seeks to reveal the primary barriers to fair economic development based on Kenyans’ perceptions of power and globalization. This search was initially sparked by the seeming disinterest of First World scholars to understand the reasons why poor countries benefit so little from the global market as reflected in a subsequent lack of a wide-ranging existing literature about the subject. The literature suggests that global capitalism is dominated by a powerful small elite, the so-called Transnational Capitalist Class (TCC), but how does this relate to Kenya and Africa in general? We know that the TCC has strong connections to financial capital and wealthy transnational corporations. It also pushes neo-liberalism, which becomes the taken-for-granted everyday language and culture that justifies state policies that result in a further class polarization between the rich and poor. Using Kenya as a case study, this article draws on original qualitative research involving face-to-face interviews with Kenyan residents in different sectors who spoke freely about what they perceive to be Kenya’s place in the world order. My interview results show that, on top of the general lack of economic power in the world order, the main barriers to Africa’s performance are neo-colonial and imperialist practices, poor technology, poor infrastructure, general governance issues, and purchasing power.

Multilingualism, urban change and gentrification in the landscape of a Brussels neighbourhood

Multilingua ◽  
2018 ◽  
Vol 37 (1) ◽  
pp. 25-52 ◽  
Author(s):  
Mieke Vandenbroucke
Keyword(s):  
Inner City ◽  
Urban Landscape ◽  
Urban Change ◽  
Linguistic Change ◽  
Socio Economic Development ◽  
History Of ◽  
The Rich ◽  
Rich History ◽  
Over Time

AbstractThis paper focuses on how different historical stages of socio-economic development in Brussels are played out on the ground over time in one particular inner-city neighbourhood, the Quartier Dansaert. In particular, I document the history of this neighbourhood and how urban change and gentrification have impacted the outlook of multilingualism and the development of multilingual discourses and language hierarchies in its material and semiotic landscape over time. By using the rich history of multilingualism in the Quartier Dansaert as a case-study, I argue in favour of more historically-sensitive and longitudinal approaches to social and, in particular, linguistic change as played out in urban landscape.

scholarly journals Can post-mortem MRI be used as a proxy for in vivo? A case study

2019 ◽  
Vol 1 (1) ◽  
Author(s):  
Baayla D C Boon ◽  
Petra J W Pouwels ◽  
Laura E Jonkman ◽  
Matthijs J Keijzer ◽  
Paolo Preziosa ◽  
...  
Keyword(s):  
White Matter ◽  
Rating Scales ◽  
Brain Volume ◽  
Brain Mri ◽  
Post Mortem ◽  
Early Onset Alzheimer’S Disease ◽  
And Diffusion

Abstract Post-mortem in situ MRI has been used as an intermediate between brain histo(patho)logy and in vivo imaging. However, it is not known how comparable post-mortem in situ is to ante-mortem imaging. We report the unique situation of a patient with familial early-onset Alzheimer’s disease due to a PSEN1 mutation, who underwent ante-mortem brain MRI and post-mortem in situ imaging only 4 days apart. T1-weighted and diffusion MRI was performed at 3-Tesla at both time points. Visual atrophy rating scales, brain volume, cortical thickness and diffusion measures were derived from both scans and compared. Post-mortem visual atrophy scores decreased 0.5–1 point compared with ante-mortem, indicating an increase in brain volume. This was confirmed by quantitative analysis; showing a 27% decrease of ventricular and 7% increase of whole-brain volume. This increase was more pronounced in the cerebellum and supratentorial white matter than in grey matter. Furthermore, axial and radial diffusivity decreased up to 60% post-mortem whereas average fractional anisotropy of white matter increased approximately 10%. This unique case study shows that the process of dying affects several imaging markers. These changes need to be taken into account when interpreting post-mortem MRI to make inferences on the in vivo situation.

scholarly journals Migration and Rural Differentiation: Evidence from a Vietnamese Village

2019 ◽  
Vol 15 (6) ◽  
pp. 106
Author(s):  
Thi Minh Khue Nguyen ◽  
Thi Dien Nguyen ◽  
Thi Minh Hop Ho ◽  
Philippe Burny ◽  
Thomas Dogot ◽  
...  
Keyword(s):  
Rural Areas ◽  
Urban Areas ◽  
Social Differentiation ◽  
Cash Income ◽  
Positive Contribution ◽  
Diversification Strategy ◽  
Circular Pattern ◽  
The Rich ◽  
Industrial Zones

This paper explores the links between migration and social differentiation in rural Vietnam after the reform period (2005–2015) through a case study of Maithon village, Chilang District, Bacninh Province. Since 2005, many villagers have left Maithon to work in cities, industrial zones or to find employment abroad. The migration process has transformed labour and income structures and supply in many households. However, 90 percent of Maithon households claimed on the positive contribution of remittance, while at the same time, they did not suffer from labour shortage due to the circular pattern of the migration. Therefore, rural out-migration is one of the diversification strategy which enables the villager to gain access to cash income in urban areas while still keep position in rural areas. It has resulted in the increase in the size of the middle class, rather than the generation of the gap between the rich and the poor. Through this process, migration becomes a developmental strategy, as a means for upward mobility rather than mechanism of social differentiation.

scholarly journals Fixel-based Analysis of Diffusion MRI: Methods, Applications, Challenges and Opportunities

2020 ◽  
Author(s):  
Thijs Dhollander ◽  
Adam Clemente ◽  
Mervyn Singh ◽  
Frederique Boonstra ◽  
Oren Civier ◽  
...  
Keyword(s):  
Diffusion Mri ◽  
State Of The Art ◽  
Specific Information ◽  
Analysis Framework ◽  
Wide Range ◽  
Challenges And Opportunities ◽  
P Diffusion ◽  
Modelling Techniques ◽  
The Rich

Diffusion MRI has provided the neuroimaging community with a powerful tool to acquire in-vivo data sensitive to microstructural features of white matter, up to 3 orders of magnitude smaller than typical voxel sizes. The key to extracting such valuable information lies in complex modelling techniques, which form the link between the rich diffusion MRI data and various metrics related to the microstructural organisation. Over time, increasingly advanced techniques have been developed, up to the point where some diffusion MRI models can now provide access to properties specific to individual fibre populations in each voxel in the presence of multiple "crossing" fibre pathways. While highly valuable, such fibre-specific information poses unique challenges for typical image processing pipelines and statistical analysis. In this work, we review the "fixel-based analysis" (FBA) framework that implements bespoke solutions to this end, and has recently seen a stark increase in adoption for studies of both typical (healthy) populations as well as a wide range of clinical populations. We describe the main concepts related to fixel-based analyses, as well as the methods and specific steps involved in a state-of-the-art FBA pipeline, with a focus on providing researchers with practical advice on how to interpret results. We also include an overview of the scope of current fixel-based analysis studies (until August 2020), categorised across a broad range of neuroscientific domains, listing key design choices and summarising their main results and conclusions. Finally, we critically discuss several aspects and challenges involved with the fixel-based analysis framework, and outline some directions and future opportunities.

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