scholarly journals The Search for Atmospheric Laminar Channels: Experimental Results and Method Dissemination

Sensors ◽  
2021 ◽  
Vol 22 (1) ◽  
pp. 158
Author(s):  
Iulian-Alin Roșu ◽  
Dragoș-Constantin Nica ◽  
Cătălin Dumitraș ◽  
Dragoș Chitariu ◽  
Luminița Bibire ◽  
...  
Keyword(s):  
Boundary Layer ◽  
Theoretical Background ◽  
Lidar Data ◽  
Practical Application ◽  
Atmospheric Flow ◽  
Turbulent Vortex ◽  
Atmospheric Structure ◽  
Atmospheric Profile ◽  
Theoretical Developments ◽  
Extract Information

In this paper, a practical application of theoretical developments found in our previous works is explored in relation to atmospheric lidar data. Multifractal structures, previously named “laminar channels”, have been identified in atmospheric profiles—these exhibit cellular and self-structuring properties, and are spatially ordered across the atmospheric profile. Furthermore, these structures have been connected to the spontaneous emergence of turbulent behavior in the calm atmospheric flow. Calculating the location and occurrence of these channels can help identify features of atmospheric evolution, such as the development of the planetary boundary layer (PBL). Employing this theoretical background to atmospheric lidar data, attempts are made to confirm this suggestion and extract information about atmospheric structure and evolution by analyzing turbulent vortex scale dynamics and scale-corresponding Lyapunov exponents that form the basis of identifying the laminar channels in atmospheric lidar profiles. A parameter named “scale laminarity index” is then introduced, which quantifies the relation between vortex scale and chaoticity throughout the profile. Finally, the algorithmic methods employed in this study are described and distributed for future use.

scholarly journals A Method for Deriving the Boundary Layer Mixing Height from MODIS Atmospheric Profile Data

Atmosphere ◽  
2015 ◽  
Vol 6 (9) ◽  
pp. 1346-1361 ◽  
Author(s):  
Xueliang Feng ◽  
Bingfang Wu ◽  
Nana Yan
Keyword(s):  
Boundary Layer ◽  
Mixing Height ◽  
Profile Data ◽  
Atmospheric Profile

scholarly journals Retrieval of Urban Boundary Layer Structures from Doppler Lidar Data. Part I: Accuracy Assessment

2008 ◽  
Vol 65 (1) ◽  
pp. 3-20 ◽  
Author(s):  
Quanxin Xia ◽  
Ching-Long Lin ◽  
Ronald Calhoun ◽  
Rob K. Newsom
Keyword(s):  
Boundary Layer ◽  
Radial Velocity ◽  
Eddy Viscosity ◽  
Velocity Fields ◽  
Urban Boundary Layer ◽  
Flow Structures ◽  
Lidar Data ◽  
Velocity Data ◽  
Beam Direction ◽  
The Cross

Abstract Two coherent Doppler lidars from the U.S. Army Research Laboratory (ARL) and Arizona State University (ASU) were deployed in the Joint Urban 2003 atmospheric dispersion field experiment (JU2003) held in Oklahoma City, Oklahoma. The dual-lidar data were used to evaluate the accuracy of a four-dimensional variational data assimilation (4DVAR) method and to identify the coherent flow structures in the urban boundary layer. The objectives of the study are threefold. The first objective is to examine the effect of eddy viscosity models on the quality of retrieved velocity data. The second objective is to determine the fidelity of single-lidar 4DVAR and evaluate the difference between single- and dual-lidar retrievals. The third objective is to inspect flow structures above some geospatial features on the land surface. It is found that the approach of treating eddy viscosity as part of the control variables yields better results than the approach of prescribing viscosity. The ARL single-lidar 4DVAR is able to retrieve radial velocity fields with an accuracy of 98% in the along-beam direction and 80%–90% in the cross-beam direction. For the dual-lidar 4DVAR, the accuracy of retrieved radial velocity in the ARL cross-beam direction improves to 90%–94% of the ASU radial velocity data. By using the dual-lidar-retrieved data as a reference, the single-lidar 4DVAR is able to recover fluctuating velocity fields with 70%–80% accuracy in the along-beam direction and 60%–70% accuracy in the cross-beam direction. Large-scale convective roll structures are found in the vicinity of the downtown airport and parks. Vortical structures are identified near the business district. Strong up- and downdrafts are also found above a cluster of restaurants.

Estimate of Boundary-Layer Depth Over Beijing, China, Using Doppler Lidar Data During SURF-2015

2016 ◽  
Vol 162 (3) ◽  
pp. 503-522 ◽  
Author(s):  
Meng Huang ◽  
Zhiqiu Gao ◽  
Shiguang Miao ◽  
Fei Chen ◽  
Margaret A. LeMone ◽  
...  
Keyword(s):  
Boundary Layer ◽  
Lidar Data ◽  
Doppler Lidar ◽  
Layer Depth ◽  
Beijing China

Supervision in clinical neuropsychology: standards and practices

2016 ◽  
Vol 47 (1) ◽  
pp. 60-71 ◽  
Author(s):  
Aline Ferreira-Correia
Keyword(s):  
Clinical Supervision ◽  
Training And Development ◽  
Theoretical Background ◽  
New Professionals ◽  
Clinical Neuropsychology ◽  
Professional Psychologists ◽  
Definition Of ◽  
Theoretical Developments ◽  
The Ideal

Clinical supervision is fundamental to the training and development of professional psychologists; however, no clear supervision methods have been developed, and the ideal competencies for psychologists and supervisors are yet to be defined. This lack of consensus is aggravated in the field of clinical neuropsychology supervision due to the dearth of literature available, which has an impact not only in the supervisory activities and the training of new professionals, but also ultimately in the quality of service provided to people that in many cases could be considered to be a vulnerable population. The theoretical background provided in this review covers conceptual developments and debates in relation to clinical supervision. Specifically, it reflects on the definition of supervision in the context of neuropsychology, as well as competencies and practices required in order to render supervision. A brief review of supervision in the field of clinical neuropsychology is included. Additionally, some insights are offered into the dearth of research and theoretical developments in this area. Finally, some comments are included in relation to the professional progress of clinical neuropsychology in developing countries, with particular reference to South Africa.

A Wind Tunnel Study of Heat Transfer Over Complex Terrain

2003 ◽  
Author(s):  
Michelle Pantoya ◽  
Kenneth Shifflett ◽  
Walter Oler ◽  
William Burton
Keyword(s):  
Boundary Layer ◽  
Wind Tunnel ◽  
Wind Energy ◽  
Flow Behavior ◽  
Three Dimensional ◽  
Flow Patterns ◽  
Atmospheric Conditions ◽  
Unstable Flow ◽  
Scaled Model ◽  
Atmospheric Flow

Maximizing wind energy resources requires a detailed understanding of atmospheric flow behavior over complex topography. The objective of this research is to examine unstable flow behavior over a three-dimensional topographic model, representative of mesa terrain that is common in West Texas. The goal is to develop an understanding of how unstable atmospheric conditions caused by surface heating affect boundary layer flow patterns in the natural environment. This objective was accomplished by experimentally monitoring transient thermal behavior of narrow band liquid crystals over a scaled model. Photographic data was collected as the heated model was subjected to a cooler flow field. The transient isotherms result from cooling as the model is exposed to flow in an atmospheric boundary layer wind tunnel. Results suggest that flow patterns associated with unstable conditions can be explained by increased wind speeds on the lee side of a mesa followed by vigorous mixing causing increased cooling rates around the mesa sides. The results could be used to improve the accuracy of numerical atmospheric flow models, assess the feasibility of developing wind turbine sites, and increase the knowledge-base in order to advance wind energy forecasting techniques.

The schema mode model for personality disorders

2014 ◽  
Vol 11 (02) ◽  
pp. 78-86
Author(s):  
E. Fassbinder ◽  
U. Schweiger ◽  
G. Jacob ◽  
A. Arntz
Keyword(s):  
Personality Disorders ◽  
Individual Case ◽  
Theoretical Background ◽  
Therapeutic Interventions ◽  
Special Focus ◽  
Specific Situation ◽  
Case Conceptualization ◽  
Practical Application ◽  
Behavioral Techniques ◽  
Present Mode

SummarySchema therapy (ST) based on the schema mode approach is currently one of the major developments in the treatment of personality disorders (PD). ST is a transdiagnostic approach, but also provides disorder-specific models for most PDs. The mode model gives a clear structure for the development of an individual case conceptualization, in which all current symptoms and interpersonal problems of the patient and the connection with their biographical context can be accommodated. The therapeutic interventions are adapted to the present mode in the specific situation. In addition to cognitive and behavioral techniques there is a special focus on experiential techniques (especially chair dialogues and imagery rescripting) and on specific features of the therapeutic relationship (‘limited reparenting’). This paper provides an overview of the theoretical background and practical application of schema mode-based ST for PDs. An individual case conceptualization and the therapeutic techniques are illustrated with a case example of a patient with histrionic PD.

scholarly journals Doppler Lidar Estimation of Mixing Height Using Turbulence, Shear, and Aerosol Profiles

2009 ◽  
Vol 26 (4) ◽  
pp. 673-688 ◽  
Author(s):  
Sara C. Tucker ◽  
Christoph J. Senff ◽  
Ann M. Weickmann ◽  
W. Alan Brewer ◽  
Robert M. Banta ◽  
...  
Keyword(s):  
Boundary Layer ◽  
Air Quality ◽  
Potential Temperature ◽  
Lidar Data ◽  
Doppler Lidar ◽  
Mixing Height ◽  
Coherent Doppler Lidar ◽  
Lidar Measurements ◽  
Comparison Of The Results ◽  
Humidity Profiles

Abstract The concept of boundary layer mixing height for meteorology and air quality applications using lidar data is reviewed, and new algorithms for estimation of mixing heights from various types of lower-tropospheric coherent Doppler lidar measurements are presented. Velocity variance profiles derived from Doppler lidar data demonstrate direct application to mixing height estimation, while other types of lidar profiles demonstrate relationships to the variance profiles and thus may also be used in the mixing height estimate. The algorithms are applied to ship-based, high-resolution Doppler lidar (HRDL) velocity and backscattered-signal measurements acquired on the R/V Ronald H. Brown during Texas Air Quality Study (TexAQS) 2006 to demonstrate the method and to produce mixing height estimates for that experiment. These combinations of Doppler lidar–derived velocity measurements have not previously been applied to analysis of boundary layer mixing height—over the water or elsewhere. A comparison of the results to those derived from ship-launched, balloon-radiosonde potential temperature and relative humidity profiles is presented.

Segregation of partly melted molecules: isolation of CpG islands by polyacrylamide gel electrophoresis

2004 ◽  
Vol 385 (10) ◽  
pp. 967-973 ◽  
Author(s):  
Masahiko Shiraishi ◽  
Adam J. Oates ◽  
Xu Li ◽  
Ying H. Chuu ◽  
Takao Sekiya
Keyword(s):  
Efficient Method ◽  
Gel Electrophoresis ◽  
Human Cancer ◽  
Polyacrylamide Gel Electrophoresis ◽  
Cpg Islands ◽  
Theoretical Background ◽  
Dna Fragments ◽  
Practical Application ◽  
Gradient Gel Electrophoresis ◽  
Denaturant Gradient Gel Electrophoresis

Abstract The technique of segregation of partly melted molecules (SPM) is a convenient and efficient method to isolate DNA fragments associated with CpG islands. The approach is conceptually simple and uses denaturant gradient gel electrophoresis to separate DNA molecules digested with restriction endonucleases. The SPM methodology has successfully been applied to the identification of genes from anonymous, unsequenced DNA fragments and CpG islands methylated in human cancer. In this article the theoretical background and practical application of the SPM method is reviewed.

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