Relationships between contemporary and subfossil macrophyte assemblages in Mediterranean ponds

2018 ◽  
Vol 69 (9) ◽  
pp. 1408 ◽  
Author(s):  
Jorge García-Girón ◽  
Margarita Fernández-Aláez ◽  
Camino Fernández-Aláez
Keyword(s):  
Surface Sediment ◽  
Historical Data ◽  
Plant Macrofossils ◽  
Relevant Information ◽  
Future Research ◽  
The North ◽  
Total Phosphorous ◽  
Macrophyte Communities ◽  
Production And Distribution ◽  
Endangered Ecosystems

Mediterranean ponds have been historically far less studied than temperate lakes of northern Europe and, for this reason, the availability of historical data is limited for these endangered ecosystems. In the absence of such data, macrofossils from surface sediment may provide highly relevant information concerning modern and past assemblages. Herein we explore the correspondence between contemporary macrophyte assemblages and their sedimentary remains from surface sediment in 35 ponds located in the North Iberian Plateau. The results show that plant macrofossils reflect both the contemporary communities from which they are derived and the environmental forces controlling their assemblage composition (primarily total phosphorous and chlorophyll-a). Overall, macrofossils may represent a useful tool for reconstructing the historical evolution of macrophyte communities, as well as the driving environmental variables, in the poorly investigated Mediterranean ponds. However, the absence of some littoral and helophytic remains in the surface sediment samples may indicate that caution should be exercised to avoid potential biases when reconstructing past macrophyte communities. Hence, we suggest that addressing the effects of coring location and the complex patterns of production and distribution of subfossils in relation to their source vegetation may provide intriguing insights for future research in Mediterranean paleolimnology.

Becoming a Global Producer: Creative and Industrial Change at Post-Studiocanal RED

2019 ◽  
Vol 16 (3) ◽  
pp. 305-326
Author(s):  
Christopher Meir
Keyword(s):  
Video On Demand ◽  
Global Strategy ◽  
Industrial Change ◽  
Export Markets ◽  
Literary Adaptation ◽  
The North ◽  
Industrial Landscape ◽  
Production And Distribution ◽  
Critical Scrutiny ◽  
The Uk

Up until late 2013, RED Production was considered one of the UK's premier independent producers. In December of that year, 51 per cent of the company was sold to Studiocanal, the production and distribution arm of France's Canal+, a pay-television provider with an increasingly global orientation. Although the UK trade press has continued to label RED as an ‘indie’, this article argues that the investment by a much larger multinational corporation marks a watershed moment in RED's history. While the company's trajectory since the takeover shows many artistic continuities with the previous fifteen years – including continuing collaboration with key writers and a dedication to shooting and setting stories in the north of England – there have also been significant changes to some of the company's long-standing practices that require critical scrutiny. The article will document and analyse a number of these, taking as case studies the series created after the investment and distributed by Studiocanal as well as a number of projects reported to be in development since that point. Collectively these changes have seen RED shift from what Andrew Spicer and Steve Presence have called its ‘rooted regionalism’ to being a more globally oriented producer, a change apparent in the settings of some of its shows. It has also seen the company embrace artistic practices – such as literary adaptation and the remaking of existing series and films – that it had long eschewed. The article seeks to explore what has been gained and lost by RED as it has embarked on this global strategy, a strategy that becomes all the more urgent as the industrial landscape of British television is transformed by the importance of international export markets and the growing power of subscription video on demand (SVOD) services such as Amazon Prime and Netflix.

Preliminary results of the study on the reasons of the Hai Hau erosion phenomenon

2007 ◽  
Vol 29 (3) ◽  
pp. 415-426
Author(s):  
Pham Van Ninh ◽  
Phan Ngoc Vinh ◽  
Nguyen Manh Hung ◽  
Dinh Van Manh
Keyword(s):  
Mathematical Modeling ◽  
Historical Data ◽  
Middle Part ◽  
Red River ◽  
Erosion Process ◽  
Red River Delta ◽  
The North ◽  
Severe Erosion ◽  
North And South ◽  
Very High

Overall the evolution process of the Red River Delta based on the maps and historical data resulted in a fact that before the 20th century all the Nam Dinh coastline was attributed to accumulation. Then started the erosion process at Xuan Thuydistrict and from the period of 1935 - 1965 the most severe erosion was contributed in the stretch from Ha Lan to Hai Trieu, 1965 - 1990 in Hai Chinh - Hai Hoa, 1990 - 2005 in the middle part of Hai Chinh - Hai Thinh (Hai Hau district). The adjoining stretches were suffered from not severe erosion. At the same time, the Ba Lat mouth is advanced to the sea and to the North and South direction by the time with a very high rate.The first task of the mathematical modeling of coastal line evolution of Hai Hau is to evaluate this important historical marked periods e. g. to model the coastal line at the periods before 1900, 1935 - 1965; 1965 - 1990; 1990 - 2005. The tasks is very complicated and time and working labors consuming.In the paper, the primarily results of the above mentioned simulations (as waves, currents, sediments transports and bottom - coastal lines evolution) has been shown. Based on the obtained results, there is a strong correlation between the protrusion magnitude and the southward moving of the erosion areas.

Holocene climate recorded by magnetic properties of lake sediments in the Northern Rocky Mountains, USA

The Holocene ◽  
2019 ◽  
Vol 30 (3) ◽  
pp. 479-484
Author(s):  
Daniel P Maxbauer ◽  
Mark D Shapley ◽  
Christoph E Geiss ◽  
Emi Ito
Keyword(s):  
Grain Size ◽  
Magnetic Properties ◽  
Rocky Mountains ◽  
Future Research ◽  
Magnetic Minerals ◽  
Holocene Climate ◽  
Northern Rocky Mountains ◽  
The North ◽  
Lake Bottom ◽  
Northern Rockies

We present two hypotheses regarding the evolution of Holocene climate in the Northern Rocky Mountains that stem from a previously unpublished environmental magnetic record from Jones Lake, Montana. First, we link two distinct intervals of fining magnetic grain size (documented by an increasing ratio of anhysteretic to isothermal remanent magnetization) to the authigenic production of magnetic minerals in Jones Lake bottom waters. We propose that authigenesis in Jones Lake is limited by rates of groundwater recharge and ultimately regional hydroclimate. Second, at ~8.3 ka, magnetic grain size increases sharply, accompanied by a drop in concentration of magnetic minerals, suggesting a rapid termination of magnetic mineral authigenesis that is coeval with widespread effects of the 8.2 ka event in the North Atlantic. This association suggests a hydroclimatic response to the 8.2 ka event in the Northern Rockies that to our knowledge is not well documented. These preliminary hypotheses present compelling new ideas that we hope will both highlight the sensitivity of magnetic properties to record climate variability and attract more work by future research into aridity, hydrochemical response, and climate dynamics in the Northern Rockies.

Making one-sided exercise decisions: The influence of exercise-related cognitive errors

2016 ◽  
Vol 23 (9) ◽  
pp. 1240-1249 ◽  
Author(s):  
Sean R Locke ◽  
Lawrence R Brawley
Keyword(s):  
Decision Making ◽  
Information Processing ◽  
Relevant Information ◽  
Future Research ◽  
Cognitive Errors ◽  
Online Questionnaire ◽  
Cognitive Error ◽  
Biased Processing

Exercise-related cognitive errors reflect biased processing of exercise-relevant information. The purpose of this study was to examine whether differences existed between individuals reporting low and high exercise-related cognitive errors on information processed about a relevant exercise decision-making situation. In all, 138 adults completed an online questionnaire. The high exercise-related cognitive error group primarily focused on negative content about the situation compared to the low exercise-related cognitive error group who focused on both positive and negative content. The high exercise-related cognitive error group displayed biased processing of exercise information, as suggested by the cognitive errors model. Future research should examine whether biasing information processing caused by exercise-related cognitive errors can be modified and attenuated.

Reflections on a Scholarly Career in Sport and Exercise Psychology: The Influence of Significant Others on the Psychosocial Well-Being of Children, Adolescents, and Young Adults

2021 ◽  
pp. 1-11
Author(s):  
Thelma S. Horn
Keyword(s):  
Physical Activity ◽  
Research Work ◽  
Well Being ◽  
Significant Others ◽  
Lessons Learned ◽  
Future Research ◽  
The North ◽  
Senior Scholar ◽  
Sport And Exercise ◽  
American Society

This paper is based on a Senior Scholar presentation delivered at the 2020 annual meeting of the North American Society for the Psychology of Sport and Physical Activity. The paper begins with a summary of the research work completed by the author and coinvestigators in regard to the influences that significant others (parents, peers, and coaches) exert on the psychosocial well-being of individuals in sport and physical activity. In each of these three areas, illustrative research studies are summarized in a predominantly chronological order with a commentary at the end of each section that identifies unanswered questions and suggests future research directions. In the second section, four particular lessons learned by the author over the course of a scholarly career are identified and explained.

To dictate or collaborate? A phenomenological exploration of physiotherapists’ leadership styles

BMJ Leader ◽  
2021 ◽  
pp. leader-2020-000403
Author(s):  
Victoria Smith ◽  
Claire Maxwell ◽  
Lisa Robinson
Keyword(s):  
Leadership Styles ◽  
Well Being ◽  
Leadership Role ◽  
Future Research ◽  
Semistructured Interview ◽  
Team Leaders ◽  
Framework Analysis ◽  
North East ◽  
The North ◽  
Health And Social Care

ObjectivesSelection of effective leadership styles within healthcare is linked to high quality, safe care for patients. Within the literature attention has been given to medical and nursing professions, failing to acknowledge the contribution made by physiotherapy leaders. This study aims to consider the leadership styles used by physiotherapists in a designated leadership role, specifically exploring the barriers they face and the strategies employed to overcome current leadership dilemmas.DesignA qualitative, phenomenological design was used. Consent was obtained from each participant for one semistructured interview which was audio recorded and transcribed verbatim. Framework analysis was used to analyse the data.SettingA large National Health Service Foundation Trust within the North East of England.ParticipantsA purposive sample of ten physiotherapy team leaders.ResultsThe theoretical leadership framework that emerged demonstrated the daily tensions experienced by physiotherapy team leaders in regard to being a transactional or transformational leader. Within this, three superordinate themes exist: the individual, the team and the organisation and beyond. Each theme contained barriers and enablers which related to transactional and transformational leadership styles, respectively.ConclusionsThe framework identified gives insight into a group of clinical leaders not yet explored and provides a foundation for the development of leadership behaviours throughout physiotherapy. These clinicians should be supported by senior leaders to develop more transformational styles which have the potential to impact on staff well-being and patient care. Future research should compare these findings with studies involving larger sample sizes that span the health and social care system.

Cryptocurrency bubble risk and the FOMC announcements during COVID-19 black swan event

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Anis Jarboui ◽  
Emna Mnif
Keyword(s):  
Federal Reserve ◽  
Abnormal Returns ◽  
Relevant Information ◽  
Future Research ◽  
Open Market ◽  
Predictive Capacity ◽  
Federal Open Market Committee ◽  
Content Type ◽  
Cumulative Abnormal Returns ◽  
Practical Implications

Purpose After the COVID-19 outbreak, the Federal Reserve has undertaken several monetary policies to alleviate the pandemic consequences on the markets. This paper aims to evaluate the effects of the Federal Reserve monetary policy on the cryptocurrency dynamics during the COVID19 pandemic. Design/methodology/approach We examine the response and feedback effects via an event study methodology. For this purpose, abnormal returns (AR) and cumulative abnormal returns (CARs) around the first FOMC (Federal Open Market Committee) announcement related to the COVID-19 pandemic for the top five cryptocurrencies are explored. We, further investigate the effect of the eight FOMC statement announcements during the COVID19 pandemic on these cryptocurrencies (Bitcoin, Ethereum, Tether, Litecoin, and Ripple). In the above-mentioned crypto-currency markets, we investigate the presence of bubbles by using the PSY test. We then examine the concordance of the dates of these bubbles with the dates of the FOMC announcements. Findings The empirical results show that the first FOMC event has a negative significant effect after 4 days of the announcement date for all studied cryptocurrencies except Tether. The results also indicate that cumulative abnormal returns are significant during the event windows of (−3,8), (−3,9), and (−3,10). Besides, we find that Bitcoin, Ethereum and, Litecoin lived short bubbles lasting for a few days. However, Ripple and Tether markets present no bubbles and no explosive periods. Research limitations/implications This paper presents trained proof that FOMC announcements have a positive effect on volatility's predictive capacity. This work therefore promotes the study of the data quality of volatility in future research as well. Practical implications The justified effect of the FOMC announcements on cryptocurrency as a speculative asset has practical implications for investors in building their trading strategies in anticipation of the next FOMC announcement. Therefore, this study implies that the FOMC announcements contain very relevant information for investors in the cryptocurrency market. This research may not only encourage a better understanding of the evolution of the expectations of policymakers, but also facilitate a better understanding of how these expectations are developed. Originality/value The COVID-19 pandemic has disturbed the stability of financial markets, inciting the Fed to take some monetary regulations. To the best of our knowledge, this study is the first one that analyses the response of five major cryptocurrencies to FOMC announcements during COVID 19 pandemic and associates these dates with bubble occurrences.

scholarly journals Cumulative Inequality at the End of Life?: Racial Disparities in Impairment in the Time Before Death

2018 ◽  
Vol 75 (6) ◽  
pp. 1292-1301 ◽  
Author(s):  
Miles G Taylor ◽  
Stella N Min ◽  
Keshia M Reid
Keyword(s):  
Racial Disparities ◽  
Growth Curves ◽  
The Elderly ◽  
Functional Independence ◽  
Epidemiologic Studies ◽  
Future Research ◽  
Racial Inequalities ◽  
Latent Growth Curves ◽  
The North ◽  
Cumulative Inequality

Abstract Objectives Drawing from cumulative inequality (CI) theory, the current study examined racial disparities in impairment as individuals approached death to determine whether proposed mechanisms hypothesized to fuel or diminish racial disparities at late ages were at work at the end of individualized life spans. Method Black–white disparities were analyzed among decedents using latent growth curves based on the data from the North Carolina Established Populations for Epidemiologic Studies of the Elderly (EPESE) (N = 1,926). Results Consistent with previous literature, racial inequalities in functional disparities diminish at late ages. However, significant black–white disparities emerge as older adults approach death, exponentially increasing within the 2 years immediately preceding death. Further, these disparities are not fully mediated by socioeconomic status. Discussion The results confirm that CI in health outcomes is observable in late life among individual life spans, suggesting the years surrounding death may be a particularly vulnerable period for health inequality. Future research should examine how advantaged statuses translate to increased access to health-related resources that aid in maintaining greater functional independence until the last stage of life.

Poplar breeding and testing strategies in the north-central U.S.: Demonstration of potential yield and consideration of future research needs

2001 ◽  
Vol 77 (2) ◽  
pp. 245-253 ◽  
Author(s):  
Don E. Riemenschneider ◽  
J. G. Isebrands ◽  
William E. Berguson ◽  
Donald I. Dickmann ◽  
Richard B. Hall ◽  
...  
Keyword(s):  
Principal Component ◽  
Future Research ◽  
Environment Interaction ◽  
Research Needs ◽  
Above Ground Biomass ◽  
University Of Minnesota ◽  
Potential Yield ◽  
North Central ◽  
Ground Biomass ◽  
The North

We present results from a Populus Regional Testing Program that has been conducted in Minnesota, Iowa, Wisconsin, and Michigan over the past six years. Our objectives have been to: 1) identify highly productive, disease resistant intra- and inter-specific clonal selections and 2) understand patterns of genotype × environment interactions within the region that would, logically, govern commercial deployment of new clones. Clones were developed by breeding and selection programs at the University of Illinois, Iowa State University, University of Minnesota, and the USDA Forest Service for experiments established in 1995. We report results of analyses of variance and principal component analyses of tree diameters and estimated above-ground biomass that demonstrate significant genotype main effects and significant genotype × environment interactions. Maximum mean annual above-ground biomass increments have surpassed 16 Mg ha−1 y−1, exceeding previously reported yields of poplars grown under similar conditions in the north-central U.S. We also discuss the breeding and selection of poplars in general with specific attention to regional research needs. Key words: Populus, biomass, multi-trait selection, genotype, genotype × environment interaction

scholarly journals A Digital Forensic Readiness Architecture for Online Examinations

2018 ◽  
Vol 30 (1) ◽  
Author(s):  
Ivans Kigwana ◽  
H. S Venter
Keyword(s):  
Online Courses ◽  
Relevant Information ◽  
Content Management ◽  
International Standards ◽  
Future Research ◽  
International Electrotechnical Commission ◽  
Course Content ◽  
Digital Forensic ◽  
Online Examination ◽  
Proactive Measures

Some institutions provide online courses to students to ease the courses’ workload. Online courses can also be convenient because the online course content management software conducts marking of tests and examinations. However, a few students could be willing to exploit such a system’s weaknesses in a bid to cheat in online examinations because invigilators are absent. Proactive measures are needed and measures have to be implemented in order to thwart unacceptable behaviour in situations where there is little control of students’ conduct. Digital Forensic Readiness (DFR) employs a proactive approach for an organisation to be forensically prepared for situations where there is little control over people. This can be achieved by gathering, storing and handling incident response data, with the aim of reducing the time and cost that would otherwise be spent in a post-event response process. The problem this paper addresses is that, at the time of writing this paper, there existed no known DFR architecture that can be used to collect relevant information for DFR purposes, specifically in the course of an online examination, as described in the standard published by the International Standards Organisation (ISO) and the International Electrotechnical Commission (IEC) (ISO/IEC 27043:2015) for incident investigation principles and processes. Due to the lack of DFR architecture, the authors propose an Online Examination Digital Forensic Readiness Architecture (OEDFRA) that can be used to achieve DFR when online examinations are conducted. This architecture employs already existing DFR techniques, discussed in the study, to help educational institutions achieve DFR in online examinations. This architecture, (OEDFRA), when implemented, will be tested in future research in order to confirm its contribution to the field of DFR.

Sign in / Sign up

Export Citation Format

Share Document