scholarly journals Iron biogeochemistry across marine systems – progress from the past decade

2010 ◽  
Vol 7 (3) ◽  
pp. 1075-1097 ◽  
Author(s):  
E. Breitbarth ◽  
E. P. Achterberg ◽  
M. V. Ardelan ◽  
A. R. Baker ◽  
E. Bucciarelli ◽  
...  

Abstract. Based on an international workshop (Gothenburg, 14–16 May 2008), this review article aims to combine interdisciplinary knowledge from coastal and open ocean research on iron biogeochemistry. The major scientific findings of the past decade are structured into sections on natural and artificial iron fertilization, iron inputs into coastal and estuarine systems, colloidal iron and organic matter, and biological processes. Potential effects of global climate change, particularly ocean acidification, on iron biogeochemistry are discussed. The findings are synthesized into recommendations for future research areas.

2009 ◽  
Vol 6 (4) ◽  
pp. 6635-6694 ◽  
Author(s):  
E. Breitbarth ◽  
E. P. Achterberg ◽  
M. V. Ardelan ◽  
A. R. Baker ◽  
E. Bucciarelli ◽  
...  

Abstract. Based on an international workshop (Gothenburg, 14–16 May 2008), this review article aims to combine interdisciplinary knowledge from coastal and open ocean research on iron biogeochemistry. The major scientific findings of the past decade are structured into sections on natural and artificial iron fertilization, iron inputs into coastal and estuarine systems, colloidal iron and organic matter, and biological processes. Potential effects of global climate change, particularly ocean acidification, on iron biogeochemistry are discussed. The findings are synthesized into recommendations for future research areas.


Author(s):  
Servet Özdemir ◽  
Ali Çağatay Kılınç

This chapter focuses on teacher leadership, an important variable in the classroom and school improvement literature. The concept of teacher leadership has attracted increased attention in the past two decades. Teachers are assuming more responsibility for leadership roles and functions within schools. Despite the considerable amount of scholarly effort and time spent on investigating the teacher leadership concept, less is known about how it flourishes in the school context and how it relates to classroom and school improvement. Therefore, this chapter tries to shed some light on the teacher leadership concept and discusses its meaning, teacher leadership roles, factors influencing teacher leadership, the relationship between teacher leadership and classroom and school improvement, and future research areas on teacher leadership. Offering a framework for teacher leadership, this chapter is expected to contribute well to the guidance of further research on teacher leadership.


2016 ◽  
Vol 12 (3) ◽  
pp. 463-483 ◽  
Author(s):  
Inna Blam ◽  
Katarína Vitálišová ◽  
Kamila Borseková ◽  
Mariusz Sokolowicz

Purpose The paper aims to analyze actual issues of the corporate social responsibility (CSR) practices in monofunctional towns in Russia, Slovakia and Poland. The process of social investment restructuring is obviously under way in these countries. However, there can be identified a few examples where the dominant employer with the long tradition (from the soviet period, even longer) has initiated and directly influenced by the social policy the local and regional development. The paper analyzes their development during the past decades, with the special emphasis on social issues. It identifies its strengths and weaknesses and defines future research areas. Design/methodology/approach The first part of the paper defines the CSR with focus on the social sphere and relationships between local dominant employer, local government and community. Refer to the theory, the paper adopts a case study methodology to explore the specifics of CSR with a focus on monotowns, especially the role of local dominant employer and its relationship with local government and community in three selected post-communist nations – Russia, Slovakia and Poland. The research uses also the secondary data (the strategic documents, statistical data) and own observation during the study visits to the selected cities. The authors analyze the town’s development during the past decades, with the special emphasis on the social issues. Findings It is shown that maintenance and development of essential living conditions in many monofunctional towns depends upon the direct participation of large dominating companies. The paper argues that there is a principal difference between the current social policy conducted by these dominant local employers and the policy that was conducted in the past. What is more, most of the engagement of large in the social affairs in monotowns refers to the CSR concept. The paper summarizes the common features and differences in functioning monotowns in selected states, from the perspective of social responsible behaviors of dominant companies, suggests the practical implications and identifies future research areas. Originality/value The paper maps the specific kind of social responsibility interconnected with the issue of local and regional development – monotowns in Russia, Poland and Slovakia – in the countries with common political and social history. It brings in the form of case studies the detailed overview of the selected examples from Russia, Ukraine and Poland dealing with the CSR. Based on the collected data, it summarizes the advantages and disadvantage of these towns and opens the new research areas.


2018 ◽  
Vol 18 (3) ◽  
pp. 368-401
Author(s):  
Ateeque Shaikh ◽  
Pratik Modi ◽  
Vanita Yadav ◽  
Prashant Kumar

Research on market orientation has evolved for more than two decades, and is now ripe for reflection on its paradigmatic and methodological moorings. We review market orientation research to understand research paradigms adopted in the studies using an operations research paradigm framework, and compare and contrast methodologies and research designs used in the literature. This study used the citation pearl-growing method to identify and review 137 studies on market orientation. The study finds a dominance of the positivist paradigm in the extant research, particularly in the North American journals. There have only been a few interpretive studies on market orientation in the past two decades. This study makes a case for methodological pluralism in the research on market orientation. The findings will benefit academia and practitioners in understanding the past research trends and identify potential future research areas. The review adds value to the literature in terms of presenting an overview of market orientation research, where the research field stands today, and where it is heading in the future.


2008 ◽  
Vol 14 ◽  
pp. 249-270 ◽  
Author(s):  
Rowan Lockwood

The past century has witnessed a number of significant breakthroughs in the study of extinction in the fossil record, from the discovery of a bolide impact as the probable cause of the end-Cretaceous (K/T) mass extinction to the designation of the “Big 5” mass extinction events. Here, I summarize the major themes that have emerged from the past thirty years of extinction research and highlight a number of promising directions for future research. These directions explore a central theme—the evolutionary consequences of extinction— and focus on three broad research areas: the effects of selectivity, the importance of recovery intervals, and the influence of spatial patterns. Examples of topics explored include the role that trait variation plays in survivorship, the comparative effects of extinctions of varying magnitudes on evolutionary patterns, the re-establishment of macroevolutionary patterns in the aftermath of extinction, and the extent to which spatial autocorrelation affects extinction patterns. These topics can be approached by viewing extinctions as repeated natural experiments in the history of life and developing hypotheses to explicitly test across multiple events. Exploring the effects of extinction also requires an interdisciplinary approach, applying evolutionary, ecological, geochronological, geochemical, tectonic, and paleoclimatic tools to both extinction and recovery intervals.


Publications ◽  
2018 ◽  
Vol 6 (3) ◽  
pp. 33
Author(s):  
Meng-Lin Chen

This study aims to provide a comprehensive and data-driven review of the knowledge domain of second language acquisition (SLA) and pedagogy in the past 30 years. Using knowledge domain visualization techniques, the study first provides a review of SLA at the disciplinary level. It then identifies the major research areas and current research frontiers in the SLA research landscape based on high-quality data retrieved from Web of Science (WoS) databases. The study provides useful references for future research and pedagogy in the field in which literature reviews employing scientometric methodology and driven by data, such as the present one, are rare, and thus, are much in need of supplement views produced by traditional literature reviews.


2011 ◽  
Vol 11 (2) ◽  
pp. 136-150 ◽  
Author(s):  
Ilir Jusufi ◽  
Christian Klukas ◽  
Andreas Kerren ◽  
Falk Schreiber

Approaches to investigate biological processes have been of strong interest in the past few years and are the focus of several research areas, especially Systems Biology. Biochemical networks as representations of processes are very important for a comprehensive understanding of living beings. Drawings of these networks are often visually overloaded and do not scale. A common solution to deal with this complexity is to divide the complete network, for example, the metabolism, into a large set of single pathways that are hierarchically structured. If those pathways are visualized, this strategy generates additional navigation and exploration problems as the user loses the context within the complete network. In this article, we present a general solution to this problem of visualizing interconnected pathways and discuss it in context of biochemical networks. Our new visualization approach supports the analyst in obtaining an overview to related pathways if they are working within a particular pathway of interest. By using glyphs, brushing, and topological information of the related pathways, our interactive visualization is able to intuitively guide the exploration and navigation process, and thus the analysis processes too. To deal with real data and current networks, our tool has been implemented as a plugin for the VANTED system.


Radiocarbon ◽  
1995 ◽  
Vol 37 (1) ◽  
pp. 81-86 ◽  
Author(s):  
Juerg Beer ◽  
Michael Sturm

Lake and loess sediments represent archives that record important information about the iocal, regional and global climate conditions in the past. Lake sediments consist of autochthonous particles formed by biogeochemical processes within the lake and allochthonous particles brought into the lake from the catchment area. After deposition, the stratigraphy of the sediment can be altered by chemical, physical and biological processes. Under favored conditions, the sediment shows individual annual layers (varves), which can be used to date the sediment. Other dating methods are based on radioactive decay (14C, 210Pb) or on time markers such as tephra layers, deposits of natural catastrophes, e.g., floods, or radioactivity, e.g., emissions from a nuclear power plant.


2021 ◽  
Author(s):  
Tong Li ◽  
Lizhen Cui ◽  
Ranjay K. Singh ◽  
Francesco Fava ◽  
Zhihong Xu ◽  
...  

Abstract Sustainable Livelihoods (SLs) is now a high-priority field in global environmental change research, becoming one of the key research paradigms in sustainability science increasingly and an important component of the Sustainable Development Goals. A Scientometrics analysis based on Science Citation Index-Expanded was performed to understand the research trends and areas in SLs studies. A total of 6441 papers related to SLs studies and 265, 759 references published from 1991 to 2020 were selected as the research objects. Using advanced quantitative analysis tools such as CiteSpace and VOSviewer, we quantify and visualize the characteristics and evolution of the literature in the field of SLs research, to clarify the historical research characteristics, knowledge base, and future research trends. The results show that the annual number of documents increased exponentially since 1991. Ecological sciences and ecology were the most popular Web of Science research areas. The institution with the greatest research documents and most citations was the CGIAR. The most influential journal is Word Development. Singh R.K., Shackleton C.M., was the most productive author. Six clusters of research areas were determined by keyword co-occurrence analysis. The results of the evolution of research hotspots show that the four tags currently still active. We also detected 11 directions of SLs research studies based on the keywords’ score relevance, which has allowed the iden-tification of future lines of research with more importance. These results can help related researchers better understand the past current and future of SLs research studies, which is significant for achieving livelihoods sustainability.


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