Wilderness carrying capacity: management and research progress in the United States

1980 ◽  
Vol 5 (3) ◽  
pp. 6-11 ◽  
Author(s):  
George H. Stankey
Keyword(s):  
United States ◽  
Carrying Capacity ◽  
The United States ◽  
Capacity Management ◽  
Research Progress

scholarly journals Comparative Study on Relative Fossil Energy Carrying Capacity in China and the United States

Energies ◽  
2021 ◽  
Vol 14 (10) ◽  
pp. 2972
Author(s):  
Zhili Zuo ◽  
Jinhua Cheng ◽  
Haixiang Guo ◽  
Yonglin Li
Keyword(s):  
United States ◽  
Carrying Capacity ◽  
The United States ◽  
Reference Area ◽  
Energy Sustainability ◽  
Fossil Energy ◽  
The Relationship ◽  
Population And Environment ◽  
Better Than ◽  
Innovative Concept

Based on resource carrying capacity, this study used the revised theory of relative resource carrying capacity (RRCC) and introduced an innovative concept of relative fossil energy carrying capacity (RFECC), which evaluates the degree of fossil energy sustainability based on the relationship between economy, population, and environment. This study took China and the United States as the study objects, took the whole country as the reference area, and calculated the RFECC of population, economic, and environmental resources from 2000 to 2018. Therefore, based on the comparative analysis, the following conclusions were drawn: (i) there is a big difference in the RFECC between China and the United States, which is manifested in the inverted U-shaped trend in China and the U-shaped trend in the United States; (ii) the relative fossil energy carrying states in China and the United States are different, mainly reflected in the economy and environment; (iii) the gap in RFECC between China and the United States has gradually widened; in general, China’s economic RFECC is better than that of the United States, while environmental RFECC and population RFECC in the United States is better than that of China; and (iv) coal and oil should be used as a breakthrough point for the sustainable fossil energy and sustainable development for China and the United States, respectively.

scholarly journals Global Research Trends of Ferroptosis: A Rapidly Evolving Field With Enormous Potential

2021 ◽  
Vol 9 ◽  
Author(s):  
Haiyang Wu ◽  
Yulin Wang ◽  
Linjian Tong ◽  
Hua Yan ◽  
Zhiming Sun
Keyword(s):  
United States ◽  
Cell Death ◽  
Photodynamic Therapy ◽  
Nuclear Factor Κb ◽  
The United States ◽  
Scientific Output ◽  
Global Perspective ◽  
Research Progress ◽  
H Index ◽  
Number Of Publications

Background: Ferroptosis is a newly proposed form of programmed cell death, and accumulating evidence suggests that it plays an essential role in the development of multiple diseases, especially cancers and neurodegenerative diseases. Since officially named in 2012, research on ferroptosis has grown rapidly. There are previous reviews focused on the research progress of ferroptosis from a certain aspect, but no bibliometric studies summarizing this field as a whole. This study aimed to assess the scientific output and activity regarding ferroptosis research from a global perspective.Methods: Publications related to ferroptosis from 2012 to 2020 were identified and selected from the Web of Science Core Collection. Excel 2019 and GraphPad Prism 8.0 was used to analyze quantitative variables including number of publications and citations, H-index, and journal citation reports. VOS viewer and CiteSpace were used to perform co-authorship, co-citation, and co-occurrence analysis of countries/institutes/authors/keywords.Results: A total of 1,285 publications on ferroptosis research were identified. The literature on ferroptosis had been continuously growing since 2012, and the expansion might continue at a rapid pace in the following years. China contributed the greatest proportion (43.74%) of ferroptosis publications, and the United States ranked first in the number of citation frequency (20,980 times) and H-index (70). B. R. Stockwell, D. L. Tang, and R. Kang were key researchers. The journal Cell Death Disease published the highest number of articles, with 42 articles. All the keywords could be divided into two clusters: cluster 1 (pathway and mechanism) and cluster 2 (treatment and effect). In terms of potential hotspots, keywords with the strong bursts and still ongoing recently were “neurodegeneration” (2017–2020), “chemotherapy” (2017–2020), “NF-kappa B” (2017–2020), and “photodynamic therapy” (2018–2020).Conclusion: There will be a dramatically increasing number of publications on ferroptosis research based on the current global trends. China has made significant progress in ferroptosis research, but the United States is actually dominated in this field. More focus will be placed on neurodegeneration, chemotherapy, nuclear factor κB, and photodynamic therapy, which may be the next popular topics in ferroptosis research.

The Carrying Capacity of the United States

2018 ◽  
pp. 245-257
Author(s):  
Virginia D. Abernethy ◽  
Garrett Hardin
Keyword(s):  
United States ◽  
Carrying Capacity ◽  
The United States

scholarly journals Research Progress on the Development of Domestic and Foreign Tourism Road

2021 ◽  
Vol 13 ◽  
pp. 144-147
Author(s):  
Dianwen Wu ◽  
Yi Wu
Keyword(s):  
United States ◽  
Evaluation System ◽  
Development Process ◽  
The United States ◽  
Research Progress ◽  
Relevant Research ◽  
Development Path ◽  
Road Design ◽  
Foreign Tourism ◽  
Japan And China

This paper compares and analyzes the development process of tourism road in the United States, Germany, Japan and China, and summarizes the relevant research results of tourism road with great significance so far. From the development of other countries, we put forward suggestions for our country's tourism roads. The goal is to explore the scientific and reasonable development path of our country's tourism roads, and build our country's tourism road design and evaluation system.

Measuring the Environmental Stress: Indicators and Application

2012 ◽  
Vol 518-523 ◽  
pp. 1561-1570
Author(s):  
Xiao Wei Gu ◽  
Qing Wang ◽  
Peng Fei Wang ◽  
Xiao Chuan Xu ◽  
Xiao Xu Wang ◽  
...  
Keyword(s):  
United States ◽  
Environmental Stress ◽  
Carrying Capacity ◽  
Human Activities ◽  
The United States ◽  
Steady Increase ◽  
Warning Sign ◽  
Stress Indicators ◽  
Six Nations ◽  
Social And Economic Development

The sustainability of a nation’s social and economic development is fundamentally determined by how much the nation’s environmental system is strained by human activities, which is in turn determined by the pressure/burden created by human activities and the carrying capacity of the nation’s environment. Based on the material flows of an economy’s metabolism and the carrying capacity of the environment, two new aggregate indicators are proposed and formulated, one being the “total domestic environmental loading” which measures the gross environmental burden imposed on the domestic environment by human activities, and the other the “total environmental stress” which measures the intensity of environmental pressure on a nation’s environment. The indicators are applied to six nations, namely, China, Germany, Netherlands, Austria, Japan, and The United States, for a number of years. Results show that, during the years from 1990 to 2002, China’s total environmental stress ranged from 57 to 82 metric tons per global hectare, exhibiting a trend of first rise, then fall and then rise again. The tendency of rebound in China’s total environmental stress after 2000 is a warning sign of further environmental degradation and should be taken seriously. During the comparison period (1993-1996), the ranking of the six nations with respect to total environmental stress, in a descending order, is China, Germany, Japan, Netherlands, The United States, and Austria. The total environmental stress values of the 5 industrial nations either remained relatively stable or declined, indicating that the environmental stress of these nations exhibited various degrees of “decoupling ” from their economic growth. China’s total environmental stress, however, experienced a steady increase in the same period and has a tendency of increase after 2002.

scholarly journals Research Progress of Ferroptosis: A Bibliometrics and Visual Analysis Study

2021 ◽  
Vol 2021 ◽  
pp. 1-13
Author(s):  
Jian Xiong ◽  
Wenchuan Qi ◽  
Jiacheng Liu ◽  
Zhenqing Zhang ◽  
Ziwen Wang ◽  
...  
Keyword(s):  
United States ◽  
Cell Death ◽  
Reperfusion Injury ◽  
Visual Analysis ◽  
Ischemia Reperfusion ◽  
The United States ◽  
Research Progress ◽  
Growth Trend ◽  
Medicine Research ◽  
Age Related

Background. Ferroptosis is a type of cell death with major topic of debate under current research and plays an important role in disease regulation. Objective. In this study, the literature management software Bibexcel and knowledge graph tool VOSviewer were used to summarize and analyze the international research trends and hotspots about ferroptosis in recent years, which highlight the disease mechanism, diagnosis, and treatment related to ferroptosis. Material/Methods. The core collection database of Web of Science was used for retrieving ferroptosis research literature. The information such as the amount of text, the country, the period, the institution, the fund, and the keywords was extracted by the bibliometric tool Bibexcel. The cooccurrence and clustering function of VOSviewer were used to analyze the high-frequency keywords and the cooperative network of the author, institution, and country. Results. The research of ferroptosis started late and was formally proposed in 2012. It has developed rapidly and presented an “exponential” growth trend. China, the United States, Germany, Japan, and France are the main national forces of ferroptosis research development. The United States and China have a relatively high degree of support and attention to ferroptosis. Exploring oxidative stress, inducers/inhibitors, synergistic antitumor effect, relationships with other cell death types, GSH/GPX4 and iron metabolism imbalance related mechanisms of ferroptosis, and ferroptosis in the nervous system disease, ischemia-reperfusion injury, tumor, inflammation, and age-related diseases are the hot research directions. Conclusion. Ferroptosis has been a research hotspot in the field of biomedicine in recent years and has attracted the attention of scholars all over the world. The occurrence mechanism of ferroptosis and its application in neurological diseases, ischemia and reperfusion injury, tumors, inflammation, and aging are the hot directions of current research. In the future, ferroptosis can be appropriately considered for strengthening new approaches, new diseases, new inductors, new inhibitors, clinical transformation, and traditional medicine research.

scholarly journals HAD-HAD PERUBAHAN BOLEH DITERIMA DALAM PELANCONGAN : SATU TINJAUAN TEORI DAN KONSEPTUAL

2020 ◽  
Vol 6 (1) ◽  
pp. 278-288
Author(s):  
Mohamad Pirdaus Yusoh ◽  
Jabil Mapjabil ◽  
Nurhazliyana Hanafi
Keyword(s):  
United States ◽  
Carrying Capacity ◽  
The United States ◽  
Forest Service ◽  
Tourist Destination ◽  
The Public ◽  
Limits Of Acceptable Change ◽  
Activity Measures ◽  
The Impact

Had perubahan boleh diterima (Limits of acceptable change - LAC) dalam pelancongan adalah satu metod dalam menentukan tahap perubahan yang mampu ditampung di sesebuah destinasi pelancongan. Pada Januari 1985, LAC diterbitkan oleh Forest Service dan dilaksanakan buat kali pertama pada 1 April 1987 terhadap kompleks hutan belantara Bob Marshall. Pada mulanya, konsep ini direka untuk diaplikasikan dalam sistem hutan belantara Amerika Syarikat bagi pengurusan yang lebih baik berikutan peningkatan permintaan serta kesan daripada pendaki dan backpacker. Proses ini menilai kesan yang berlaku semasa aktiviti, mengukur perubahan yang akan diterima, memantau apa yang berlaku secara sistematik dan teratur dan menentukan  tindakan yang sesuai dan dipersetujui oleh beberapa pihak berkepentingan selepas perbincangan. LAC berbeza dengan kapasiti daya tampung (caryying capacity) kerana konsep kapasiti daya tampung itu sendiri hanya memfokuskan kepada perspektif biofizikal manakala LAC lebih menggalakkan perbincangan, menimbulkan pendapat dan cadangan daripada orang awam dan pihak pengurusan. Ia dianggap sistem yang terbaik dalam menyelesaikan sesuatu isu di lokasi pelancongan. Justeru, artikel ini akan meneliti konsep dan langkah-langkah dalam menyelesaikan isu berdasarkan sistem LAC ini.   Limits of Acceptable Change (LAC) in tourism is a method in determining the level of change that can be accommodated in a tourist destination. In January 1985, the LAC was issued by the Forest Service and was first implemented on April 1, 1987 on the Bob Marshall wilderness complex. Initially, it was designed to be applied in the United States wilderness system for better management following increased demand and impact from climbers and backpackers. This process assesses the impact that occurs during the activity, measures the changes that will be received, monitors what is happening systematically and determines the appropriate action and agreed by several stakeholders after discussion. LAC differs from caryying capacity because the concept of carrying capacity itself only focuses on biophysical perspectives while LAC is more encouraging discussion, raising opinions and suggestions from the public and management. It is considered the best system in resolving an issue at a tourist location. Thus, this paper will examine the concepts and steps in resolving issues based on this LAC system.

scholarly journals Research progress of heat stroke during 1989–2019: a bibliometric analysis

2021 ◽  
Vol 8 (1) ◽  
Author(s):  
De-Meng Xia ◽  
Xu-Ren Wang ◽  
Pan-Yu Zhou ◽  
Tian-Le Ou ◽  
Lei Su ◽  
...  
Keyword(s):  
United States ◽  
Heat Waves ◽  
Heat Stroke ◽  
The United States ◽  
Epidemiological Studies ◽  
Research Progress ◽  
Physical Disorder ◽  
Citation Frequency ◽  
Number Of Publications

Abstract Background Heat stroke (HS) is an acute physical disorder that is associated with a high risk of organ dysfunction and even death. HS patients are usually treated symptomatically and conservatively; however, there remains a lack of specific and effective drugs in clinical practice. An analysis of publication contributions from institutions, journals and authors in different countries/regions was used to study research progress and trends regarding HS. Methods We extracted all relevant publications on HS between 1989 and 2019 from Web of Science. Using the Statistical Package for Social Science (SPSS, version 24) and the software GraphPad Prism 8, graphs were generated and statistical analyses were performed, while VOSviewer software was employed to visualize the research trends in HS from the perspectives of co-occurring keywords. Results As of April 14, 2020, we identified 1443 publications with a citation frequency of 5216. The United States accounted for the largest number of publications (36.2%) and the highest number of citations (14,410), as well as the highest H-index at 74. Although the sum of publications from China ranked second, there was a contradiction between the quantity and quality of publications. Furthermore, Medicine & Science in Sports & Exercise published the most papers related to HS, with Lin MT publishing the most papers in this field (112), while the review by Knochel JP received the highest citation frequency at 969. The keyword heat-stress appeared most recently, with an average appearing year of 2015.5. In the clinical research cluster, exertional heat-stroke was determined to be the hotspot, while ambient-temperature and heat waves were the new trends in the epidemiological research cluster. Conclusions Corresponding to this important field, while the contributions of the publications from the United States were significant, the mismatch between the quantity and quality of publications from China must be examined. Moreover, it is hypothesized that clinical and epidemiological studies may become hotspots in the near future.

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