Appalachian Peneplains: An Historical Review

1983 ◽  
Vol 2 (2) ◽  
pp. 156-164 ◽  
Author(s):  
William Sevon ◽  
Noel Potter ◽  
George Crowl

The concept that erosion, over a long period of time, would produce an evolutionary progression of landforms culminating in a nearly flat plain, the peneplain, was formulated into a coherent theory by W. M. Davis. Subsequent to early identification of the Fall Zone (oldest), Schooley, Harrisburg, and Somerville (youngest) peneplains, numerous workers pursued identification, correlation, description, folding, formative processes, and dating of Appalachian peneplains for 6 decades. Following a peak of interest and activity in the 1930's, work on Appalachian peneplains declined rapidly. Reasons for the decline include: death of former workers, diversion into other lines of research, and rise of process geomorphology. Phenomena attributed to a dependence on peneplanation include: origin of present drainage, origin of some mineral resources, and cementation of rock units. Attacks on the peneplain idea have been largely unsuccessful except for the dynamic equilibrium concept advocated by John Hack. Controversy exists about whether the disparity between rates of uplift and denundation allow adequate time for peneplanation to occur. The relationship of some surficial deposits to presumed peneplain surfaces is problematical. The peneplain concept is still alive, but new lines of research are required to resolve its controversial position.

2018 ◽  
Vol 2018 ◽  
pp. 1-8
Author(s):  
Ling Hu ◽  
Wanqun Chen ◽  
Ming Cheng ◽  
Ting Zhang ◽  
Shaoyang Lan ◽  
...  

To investigate the relationship of MUC1, MUC5AC, and the syndrome of spleen and stomach, 109 subjects (34 peptic ulcer (PU), 62 chronic gastritis (CG), and 13 healthy volunteers (CON)) were included. All the subjects included were surveyed with questionnaire to classify them into damp-heat syndrome of spleen and stomach (DHSS), spleen-qi deficiency syndrome (SQD), and CON, examined by gastric endoscope, and biopsied. Rapid urease and methylene blue staining (MBS) were performed on every subject to diagnose for Helicobacter pylori (Hp) infection, and both were defined as Hp-positive. Hematoxylin and eosin (HE) staining was performed on every specimen to explore the histomorphology, inflammatory degree, and inflammatory activity of different groups; then Elivision™ plus kit was used to test the expression of MUC1 and MUC5AC. All the results of digital images were reviewed by two experts blindly. The inflammatory degree with Hp infection was higher than those uninfected or CON, but no significant difference was found between DHSS and SQD. And the expressions of MUC5AC with positive Hp was higher than those with negative Hp or CON regardless of the deficiency and solid syndrome of spleen-stomach but not for MUC1. We speculate that the deficiency and solid syndrome of spleen-stomach is a condition like Tai Ji symbol of dynamic equilibrium, showing the higher expression of MUC5AC but no change of MUC1 in the circumstance of Hp infection.


2016 ◽  
Vol 12 (S325) ◽  
pp. 263-265
Author(s):  
Rustam Guliyev ◽  
Ayyub Guliyev

AbstractIn the present work we investigate the possible relationship of long-period comets with five large and distant trans-Neptunian bodies (Sedna, Eris, 2007 OR10, 2012 VP113and 2008 ST291) in order to determine the probability of the transfer of a part of these kind of comets to the inner of the Solar System. To identify such relationships, we studied the relative positions of the comet orbits and listed TNOs. Using numerical integration methods, we examined dynamical evolution of the comets and have found one encounter of comet C/1861J1 and Eris.


2010 ◽  
Vol 33 (1) ◽  
pp. 4.1-4.32 ◽  
Author(s):  
Richard B. Baldauf ◽  
Robert B. Kaplan

Applied Linguistics is a diverse field, comprising a substantial number of sub-fields, sub-specialisations and related fields. To see that this is the case one need only examine the various hand- books and encyclopaedic references that have been published in the last ten years to see the wide range of topics that have been covered. As with many professional areas in academia, Applied Linguistics is organised around national organisations, with its international structure being a loose confederation known as the International Association of Applied Linguistics (AILA). Given these diverse academic and structural arrangements, it should not be surprising if academics within different national associations were to cluster around different interests within the field. This study explores the question of what emphases are found in various parts of the world in Applied Linguistics, and in particular, the relationship of Australian Applied Linguistics to international trends using a structural text analysis of abstracts related to Applied Linguistics as well as an historical review of the trends involved.


1986 ◽  
Vol 10 (4) ◽  
pp. 297-310 ◽  
Author(s):  
Elaine Westerlund

An historical review of the development and rejection of Freud's seduction theory is presented. Questions are raised regarding the relationship of self-analysis to Freud's repudiation.


Author(s):  
Yi-Ching Pan

This paper addresses the issue of whether it is appropriate for universities or junior colleges to set foreign language proficiency requirements for graduation and offers a historical review of the relationship of test validity and test use. Examples of how to evaluate the appropriateness and consequences of test use are presented in order to discover what factors must be taken into account that contributes to the decision-making process. Finally, a model that specifies what evidence needs to be collected in support of a valid test decision is offered to help make decisions of test use more convincing and accordingly more beneficial to those individuals and groups who are affected by the tests.


2009 ◽  
Vol 4 (1) ◽  
pp. 8-16 ◽  
Author(s):  
Tudor Lupascu ◽  
Pavel F. Vlad ◽  
Aculina Aricu ◽  
Maria Cocu

This communication deals with the appearance and development of the research in the field of chemistry in the Republic of Moldova; at the beginning - in chemistry sections of Moldovan Branch of the USSR Academy of Sciences and then - at the Institute of Chemistry, founded in 1959. The dynamics of changes in the structure and research subjects is traced. Data are presented concerning the research results in the fi eld of the chemistry of coordination compounds, fine organic synthesis, natural products chemistry, physicochemical analysis, quantum chemistry, mineral resources, chemistry of natural water and purifi cation of waste water, the preparation and utilization of active carbons, and ecological chemistry. A detailed account both of basic research and applied investigation is given. The collaboration of our scientists with their colleagues from abroad is considered. Information is presented related to the scientific schools at our institute, its guidance and laboratory′s leaders. The scientific equipment of the institute is mentioned. The relationship of the institute with higher schools, as well as training of young researchers will be presented.


2010 ◽  
Vol 33 (1) ◽  
pp. 4.1-4.32
Author(s):  
Richard B. Baldauf ◽  
Robert B. Kaplan

Applied Linguistics is a diverse field, comprising a substantial number of sub-fields, sub-specialisations and related fields. To see that this is the case one need only examine the various hand- books and encyclopaedic references that have been published in the last ten years to see the wide range of topics that have been covered. As with many professional areas in academia, Applied Linguistics is organised around national organisations, with its international structure being a loose confederation known as the International Association of Applied Linguistics (AILA). Given these diverse academic and structural arrangements, it should not be surprising if academics within different national associations were to cluster around different interests within the field. This study explores the question of what emphases are found in various parts of the world in Applied Linguistics, and in particular, the relationship of Australian Applied Linguistics to international trends using a structural text analysis of abstracts related to Applied Linguistics as well as an historical review of the trends involved.


Author(s):  
Xiangcheng Meng ◽  
Huaiyuan Zhai ◽  
Alan H. S. Chan

China’s construction industry has experienced a long period of development and reform but compared to developed countries, safety on construction sites in China continues to present serious problems. Safety consciousness and safety citizenship behaviour are influential factors related to safety issues in the construction industry and may play a direct role in improving the safety of personnel on construction sites. However, recently no research has been focused on the relationship between safety consciousness and safety citizenship behaviour. Therefore, this paper aimed to investigate the relationship between safety consciousness and safety citizenship behaviour for personnel working on construction sites in China by using a questionnaire survey and statistical analysis, so that correlation between safety consciousness and safety citizenship can be demonstrated and effective measures suggested to improve the safety of construction workers in China, and perhaps in other countries as well.


1996 ◽  
Vol 19 (3) ◽  
pp. 517-532 ◽  
Author(s):  
Jaroslava Dittrichová ◽  
Václav Břicháček ◽  
František Mandys ◽  
Karel Paul ◽  
Daniela Sobotková ◽  
...  

The present study aimed, first, to analyse in detail early sleep states in 21 preterm infants born before the 33rd week of gestational age and compare them with sleep states in 23 fullterm infants assessed at gestationally matched ages in the first six months. Second, to determine whether analyses of early sleep states in preterm infants may enable identification of infants with future developmental disabilities. In addition to evaluations of perinatal risk factors, neurological condition, psychological development, and social environment during the first year of life, examinations of psychological and neurological development and the assessment of the social environment at 3 and 9 years were carried out. Measures of perinatal status and sleep states up to the age of 40 weeks gestational age did not correlate with outcome measures at 3 and 9 years. However, the polygraphic measures of sleep states at 12 and 24 weeks corrected age, predicted the 3-year developmental outcomes. The complexity of these measures may contribute to their predictive validity for the outcomes at 3 years. Measures of the social environment at 3 and 9 years contributed significantly to the prediction of 9-year developmental outcomes. These results indicate that environmental factors may become more important with age. The detailed analysis of early sleep patterns may enable the early identification of infants who need special care and intervention.


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