scholarly journals LONG-TERM MORPHOLOGICAL EVOLUTION MODEL

2018 ◽  
pp. 64
Author(s):  
Bradley Johnson ◽  
Jesse McNinch
Keyword(s):  
South Carolina ◽  
Morphological Evolution ◽  
Shoreline Change ◽  
One Dimensional ◽  
The Past ◽  
Longshore Transport ◽  
Model Predictions ◽  
Erosion And Accretion ◽  
The One

Nearshore morphology models predicting storm-scale erosion have been in use for the past several decades. These empirical tools typically focus on a single time-scale, which limits the utilization. For example, models developed to predict cross-shore storm erosion are poorly suited for longer-term simulations that include the beach recovery between events and gradients in longshore transport. Herein, the one-dimensional model CSHORE is extended to include shoreline change associated with along- shore variation in transport. A comparison of model predictions with long-term shoreline data from South Carolina demonstrate reasonable agreement with both erosion and accretion.

scholarly journals The trend of the oxidants in boreal forest over 2007–2018: comprehensive modelling study with long-term measurements at SMEAR II, Finland

2020 ◽  
Author(s):  
Dean Chen ◽  
Putian Zhou ◽  
Tuomo Nieminen ◽  
Pontus Roldin ◽  
Ximeng Qi ◽  
...  
Keyword(s):  
Air Pollutants ◽  
Size Range ◽  
Chemical Components ◽  
Detailed Model ◽  
One Dimensional ◽  
The Past ◽  
Main Driver ◽  
The One ◽  
Long Term Trend

Abstract. Major atmospheric oxidants (OH, O3 and NO3) dominate the atmospheric oxidation capacity, while H2SO4 is considered as a main driver for new particle formation events. Although numerous studies have investigated the long-term trend of ozone in Europe, the trend of OH, NO3 and H2SO4 at specific sites are to a large extent unknown. In this study, we investigated how the trends in major atmospheric oxidants (OH, O3 and NO3) and H2SO4 changed in southern Finland during the past 12 years and discuss how these trends relate to decreasing emissions of regulated air pollutants in Europe. The one-dimensional model SOSAA has been applied in several studies at the SMEAR II station, and has been validated by measurements in several projects. Here, we ran the SOSAA model for the years 2007–2018 to simulate the atmospheric chemical components, especially the atmospheric oxidants and H2SO4 at SMEAR II. The simulations were evaluated with observations at SMEAR II for several shorter and longer campaigns. Our results show that OH increased by +1.56 (−0.8; +3.17) % yr−1 during daytime and NO3 decreased by −3.92 (−6.49; −1.79) % yr−1 during nighttime, indicating different trends of the oxidants during day and night. Sulphuric acid decreased during daytime by −5.12 (−11.39; −0.52) % yr−1, which correlated with the observed decreasing concentration of newly formed particles in the size range 3–25 nm by 1.4 % yr−1 at SMEAR II during the years 1997–2012 (Nieminen et al., 2014). Additionally we compared our simulated OH, NO3 and H2SO4 concentrations with proxies, which are commonly applied in case limited amount of parameters are measured and no detailed model simulations are available.

scholarly journals Validation of a one-dimensional model of the systemic arterial tree

2009 ◽  
Vol 297 (1) ◽  
pp. H208-H222 ◽  
Author(s):  
Philippe Reymond ◽  
Fabrice Merenda ◽  
Fabienne Perren ◽  
Daniel Rüfenacht ◽  
Nikos Stergiopulos
Keyword(s):  
Constitutive Law ◽  
Distributed Model ◽  
Arterial Tree ◽  
One Dimensional ◽  
Continuity Equations ◽  
Nonlinear Viscoelastic ◽  
Model Predictions ◽  
The One ◽  
D Model ◽  
Systemic Arterial Tree

A distributed model of the human arterial tree including all main systemic arteries coupled to a heart model is developed. The one-dimensional (1-D) form of the momentum and continuity equations is solved numerically to obtain pressures and flows throughout the systemic arterial tree. Intimal shear is modeled using the Witzig-Womersley theory. A nonlinear viscoelastic constitutive law for the arterial wall is considered. The left ventricle is modeled using the varying elastance model. Distal vessels are terminated with three-element windkessels. Coronaries are modeled assuming a systolic flow impediment proportional to ventricular varying elastance. Arterial dimensions were taken from previous 1-D models and were extended to include a detailed description of cerebral vasculature. Elastic properties were taken from the literature. To validate model predictions, noninvasive measurements of pressure and flow were performed in young volunteers. Flow in large arteries was measured with MRI, cerebral flow with ultrasound Doppler, and pressure with tonometry. The resulting 1-D model is the most complete, because it encompasses all major segments of the arterial tree, accounts for ventricular-vascular interaction, and includes an improved description of shear stress and wall viscoelasticity. Model predictions at different arterial locations compared well with measured flow and pressure waves at the same anatomical points, reflecting the agreement in the general characteristics of the “generic 1-D model” and the “average subject” of our volunteer population. The study constitutes a first validation of the complete 1-D model using human pressure and flow data and supports the applicability of the 1-D model in the human circulation.

scholarly journals Quantitative Spectroscopy of Wolf-Rayet Stars

1988 ◽  
Vol 108 ◽  
pp. 133-140
Author(s):  
W. Schmutz
Keyword(s):  
Representative Point ◽  
Dimensional Model ◽  
Model Calculations ◽  
One Dimensional ◽  
The Past ◽  
First Results ◽  
The One ◽  
Expanding Atmospheres ◽  
New Generation ◽  
The Continuum

Advances in theoretical modeling of rapidly expanding atmospheres in the past few years made it possible to determine the stellar parameters of the Wolf-Rayet stars. This progress is mainly due to the improvement of the models with respect to their spatial extension: The new generation of models treat spherically-symmetric expanding atmospheres, i.e. the models are one-dimensional. Older models describe the wind by only one representative point. The older models are in fact ‘core-halo’ approximations. They have been introduced by Castor and van Blerkom (1970), and were extensively employed in the past (cf. e.g. Willis and Wilson, 1978; Smith and Willis, 1982). First results from new one-dimensional model calculations are published by Hillier (1984), Schmutz (1984), Hamann (1985), Hillier (1986), and Schmutz et al. (1987a); more detailed results are presented by Schmutz and Hamann (1986), Hamann and Schmutz (1987), Hillier (1987a,b), Wessolowski et al. (1987), Hillier (1987c) and Hamann et al. (1987). These results demonstrate that the step from zero- to one-dimensional calculations is essential. The important point is that the complicated interrelation between NLTE-level populations and radiation field is treated adequately (Schmutz and Hamann, 1986; Hillier, 1987). For this interrelation it is crucial to model consistently not only the line-formation region, but also the layers where the continuum is emitted. In fact, it is the core-halo approximation that causes the one-point models to fail in certain aspects.

scholarly journals The impact of adopting the euro on the Croatian economy

Notitia ◽  
2019 ◽  
Vol 5 (1) ◽  
pp. 73-89
Author(s):  
Zlatko Čehulić ◽  
Rajka Hrbić
Keyword(s):  
Positive Influence ◽  
European Countries ◽  
Economic Indicators ◽  
The Past ◽  
The Future ◽  
Term Basis ◽  
The One ◽  
The Impact

In this paper the impact of adopting the euro in Croatia is analysed using experiences of other countries which have passed through this process in the last decade and which are comparable with Croatia in many aspects. The process of adopting a currency different from the one that has been used for more than twenty years presents a very important economic question for each country. In this period preceding to adopting the euro, there is an opportunity to analyse this process in the countries which went through it in the past. The result of this paper shows the impacts of adopting the euro in the European countries. The selected countries, which are adequate for analysing the effects of adopting the euro, are: Portugal, Ireland, Greece, Spain, Slovenia, Slovakia, Estonia, Lithuania and Latvia. These countries have been selected for different reasons. The majority of these countries have some similarities with Croatia, which are shown in this paper via relevant economic indicators. These results are significant for Croatia and show a positive influence on the Croatian market on a long-term basis. This paper is relevant and has a practical basis both for Croatia and other countries which will go through this process in the future.

Neuropsychological Investigations of Human Amnesia: Insights Into the Role of the Medial Temporal Lobes in Cognition

2017 ◽  
Vol 23 (9-10) ◽  
pp. 732-740 ◽  
Author(s):  
Mieke Verfaellie ◽  
Margaret M. Keane
Keyword(s):  
Long Term Memory ◽  
Medial Temporal Lobes ◽  
Theoretical Understanding ◽  
Temporal Lobes ◽  
The Past ◽  
Clinical Disorders ◽  
Nuanced Understanding ◽  
The One

AbstractThe past 30 years of research on human amnesia has yielded important changes in our understanding of the role of the medial temporal lobes (MTL) in memory. On the one hand, this body of evidence has highlighted that not all types of memory are impaired in patients with MTL lesions. On the other hand, this research has made apparent that the role of the MTL extends beyond the domain of long-term memory, to include working memory, perception, and future thinking. In this article, we review the discoveries and controversies that have characterized this literature and that set the stage for a new conceptualization of the role of the MTL in cognition. This shift toward a more nuanced understanding of MTL function has direct relevance for a range of clinical disorders in which the MTL is implicated, potentially shaping not only theoretical understanding but also clinical practice. (JINS, 2017, 23, 732–740)

Memory of Futures

KronoScope ◽  
2004 ◽  
Vol 4 (2) ◽  
pp. 297-315 ◽  
Author(s):  
Barbara Adam
Keyword(s):  
Genetic Modification ◽  
Nuclear Power ◽  
The Other ◽  
Way Of Life ◽  
Memory Aids ◽  
The Past ◽  
The Future ◽  
The One ◽  
Far Future

AbstractWe think of memories as being focused on the past. However, our ability to move freely in the temporal realm of past, present and future is far more complex and sophisticated than commonsense would suggest. In this paper I am concerned with our capacity to produce and extend ourselves into the far future, for example through nuclear power or the genetic modification of food, on the one hand, and our inability to know the potential, diverse and multiple outcomes of this technologically constituted futurity, on the other. I focus on this discrepancy in order to explore what conceptual tools are available to us to take account of long-term futures produced by the industrial way of life. And I identify some historical approaches to the future on the assumption that the past may well hold vital clues for today's dilemma, hence my proposal to engage in 'memory of futures'. I conclude by considering the potential of 'memory aids for the future' as a means to better encompass in contemporary concerns the long-term futures of our making.

scholarly journals Memory and Alterity in Zar: Religious Contact and Change in the Sudan

2019 ◽  
Vol 8 ◽  
Author(s):  
Susan M Kenyon
Keyword(s):  
Life History ◽  
The Other ◽  
Ethnographic Research ◽  
The Past ◽  
Life History Data ◽  
History Of ◽  
The One ◽  
Ninteenth Century ◽  
Dynamic Interplay

Drawing on long-term ethnographic research in the Blue Nile town of Sennar, supported by archival and historical documentation, this article explores the history of Zar spirit possession in Sudan, and the light this throws on the interplay of religions over the past 150 years. Life history data supports the argument that contemporary Zar is grounded in forms and rituals derived from the ranks of the ninteenth-century Ottoman army, and these remain the basis of ritual events, even as they accommodate ongoing changes in this part of Africa. Many of these changes are linked to the dynamic interplay of Zar with forms of Islam, on the one hand, and Christianity, on the other. In the former colonial periods, political power resided with the British, and Khawaja (European) Christian Zar spirits are remembered as far more important. Today that authority in Zar has shifted to spirits of foreign Muslims and local holy men, on the one hand, and to subaltern Blacks, on the other. These speak to concerns of new generations of adepts even as changes in the larger political and religious landscapes continue to transform the context of Zar.

scholarly journals Pathogenetic features of chronic osteomyelitis treatment

2021 ◽  
Vol 27 (5) ◽  
pp. 628-635
Author(s):  
D.V. Rimashevskiy ◽  
◽  
I.F. Akhtyamov ◽  
P.N. Fedulichev ◽  
Wessam Zaalan ◽  
...  
Keyword(s):  
Soft Tissues ◽  
Diagnosis And Treatment ◽  
Steady Increase ◽  
Joint Function ◽  
The Past ◽  
Joint Pathology ◽  
The Social ◽  
Severe Pathology ◽  
The One

Abstract Over the past decades, there has been a steady increase in the incidence of osteomyelitis. It is associated with an increased use of implants in traumatology and orthopedics. The social aspects of osteomyelitis are, on the one hand, significant financial costs for the healthcare system, and on the other hand, high recurrence and re-infection in the treatment of joint pathology associated with long-term loss of work ability and a high risk of patient’s disability. Purpose To conduct a search and analysis of publications in Russian and English, devoted to the problem of osteomyelitis and periprosthetic infection, on the basis of which to summarize the main current notions about the etiology, pathogenesis, diagnosis and treatment of osteomyelitis. Materials and methods The search was carried out in the Pubmed and CyberLeninka databases of literature sources over the past 10 years. The data were analyzed and compared with the materials from earlier publications. Only publications from peer-reviewed journals were considered for analysis. Results and discussion Success in the treatment of peri-implant infection with prosthesis re-implantation and satisfactory joint function has been achieved in only just more than a half of patients. Recent studies have significantly changed the understanding of the etiology and pathogenesis of osteomyelitis. It has been proven that in osteomyelitis and implant-associated infection, four reservoirs of infection are formed in the patient's body: abscesses in soft tissues and bone marrow canal, biofilms on the surface of implants and necrotic tissues, intracellular colonization with bacteria of the macroorganism and lacunar-canalicular system. Understanding the mechanisms of osteomyelitis development and its course forces the specialists to take a fresh look at the causes of failures in the fight against such a severe pathology and change approaches to its prevention, diagnosis and treatment.

scholarly journals Effects of geologic outcrops on long-term geomorphic trends : New Madrid, MO, to Hickman, KY

2021 ◽  
Author(s):  
Travis Dahl ◽  
Justin Giles ◽  
Kathleen Staebell ◽  
David Biedenharn ◽  
Joseph Dunbar
Keyword(s):  
Mississippi River ◽  
Water Surface ◽  
Hydraulic Modeling ◽  
Shear Stresses ◽  
High Shear ◽  
One Dimensional ◽  
Surface Profiles ◽  
The One ◽  
New Madrid

The Mississippi River between New Madrid, MO, and Hickman, KY, is of particular interest because of divergent trends in water surface profiles at the upstream and downstream ends of the reach. This report documents the investigation of the bathymetry, geology, and hydraulics of this segment of the river. The report shows that the area near River Mile 901 above Head of Passes strongly affects the river stages at low flows. This part of the river can experience high shear stresses when flows fall below 200,000 cfs, as opposed to most other locations where shear stress increases with flow. One-dimensional hydraulic modeling was also used to demonstrate that an increase of depth at a single scour hole, such as the one downstream from Hickman near River Mile 925, is unlikely to cause reach-wide degradation.

scholarly journals Strictly local one-dimensional topological quantum error correction with symmetry-constrained cellular automata

2018 ◽  
Vol 4 (1) ◽  
Author(s):  
Nicolai Lang ◽  
Hans Peter Büchler
Keyword(s):  
Cellular Automata ◽  
Cellular Automaton ◽  
Error Correction ◽  
Quantum Error Correction ◽  
One Dimensional ◽  
Decoding Algorithms ◽  
Topological Quantum ◽  
The One ◽  
Quantum Error

Active quantum error correction on topological codes is one of the most promising routes to long-term qubit storage. In view of future applications, the scalability of the used decoding algorithms in physical implementations is crucial. In this work, we focus on the one-dimensional Majorana chain and construct a strictly local decoder based on a self-dual cellular automaton. We study numerically and analytically its performance and exploit these results to contrive a scalable decoder with exponentially growing decoherence times in the presence of noise. Our results pave the way for scalable and modular designs of actively corrected one-dimensional topological quantum memories.

Sign in / Sign up

Export Citation Format

Share Document