scholarly journals Lagrangian predictability of high-resolution regional models: the special case of the Gulf of Mexico

2004 ◽  
Vol 11 (1) ◽  
pp. 47-66 ◽  
Author(s):  
P. C. Chu ◽  
L. M. Ivanov ◽  
L. H. Kantha ◽  
T. M. Margolina ◽  
O. V. Melnichenko ◽  
...  
Keyword(s):  
Gulf Of Mexico ◽  
Prediction Error ◽  
Spatial Scales ◽  
Singular Values ◽  
Forecast System ◽  
Gaussian Shape ◽  
University Of Colorado ◽  
Non Gaussian ◽  
The University ◽  
Lagrangian Drifter

Abstract. The Lagrangian prediction skill (model ability to reproduce Lagrangian drifter trajectories) of the nowcast/forecast system developed for the Gulf of Mexico at the University of Colorado at Boulder is examined through comparison with real drifter observations. Model prediction error (MPE), singular values (SVs) and irreversible-skill time (IT) are used as quantitative measures of the examination. Divergent (poloidal) and nondivergent (toroidal) components of the circulation attractor at 50m depth are analyzed and compared with the Lagrangian drifter buoy data using the empirical orthogonal function (EOF) decomposition and the measures, respectively. Irregular (probably, chaotic) dynamics of the circulation attractor reproduced by the nowcast/forecast system is analyzed through Lyapunov dimension, global entropies, toroidal and poloidal kinetic energies. The results allow assuming exponential growth of prediction error on the attractor. On the other hand, the q-th moment of MPE grows by the power law with exponent of 3q/4. The probability density function (PDF) of MPE has a symmetrical but non-Gaussian shape for both the short and long prediction times and for spatial scales ranging from 20km to 300km. The phenomenological model of MPE based on a diffusion-like equation is developed. The PDF of IT is non-symmetric with a long tail stretched towards large ITs. The power decay of the tail was faster than 2 for long prediction times.

scholarly journals Single-particle statistics in the southern Gulf of Mexico

2018 ◽  
Vol 57 (2) ◽  
Author(s):  
Luis Zavala Sansón ◽  
Julio Sheinbaum ◽  
Paula Pérez-Brunius
Keyword(s):  
Gulf Of Mexico ◽  
Single Particle ◽  
Probability Distributions ◽  
Large Data ◽  
Data Set ◽  
Gaussian Shape ◽  
Southern Gulf Of Mexico ◽  
Surface Drifters ◽  
Non Gaussian ◽  
Particle Statistics

We present single-particle statistics of a large data set of surface drifters released in the southern Gulf of Mexico. The study is focused on the probability density functions of velocities, Lagrangian scales and absolute dispersion estimates. The probability distributions display a non-Gaussian shape with extended tails. It is shown that the long tails are mainly associated with the Campeche gyre (an intense cyclonic circulation frequently formed in the region) and, to a lesser extent, with a flow along the western margin of the basin. The results are discussed in light of previous studies on ocean dispersion that have reported Gaussian and non-Gaussian distributions in other regions.

The 1-MeV Electron Microscope Installation at the University of Colorado

1973 ◽  
Vol 31 ◽  
pp. 8-9 ◽  
Author(s):  
Mircea Fotino
Keyword(s):  
Electron Microscopy ◽  
Developmental Biology ◽  
Transmission Electron Microscopy ◽  
Electron Microscope ◽  
National Institutes Of Health ◽  
Experimental Program ◽  
University Of Colorado ◽  
Transmission Electron ◽  
The University ◽  
Research Resources

A new 1-MeV transmission electron microscope (Model JEM-1000) was installed at the Department of Molecular, Cellular and Developmental Biology of the University of Colorado in Boulder during the summer and fall of 1972 under the sponsorship of the Division of Research Resources of the National Institutes of Health. The installation was completed in October, 1972. It is installed primarily for the study of biological materials without many of the limitations hitherto unavoidable in standard transmission electron microscopy. Only the technical characteristics of the installation are briefly reviewed here. A more detailed discussion of the experimental program under way is being published elsewhere.

Discourse Mapping

2019 ◽  
Vol 2 (1) ◽  
Author(s):  
Joanna BOEHNERT
Keyword(s):  
Environmental Politics ◽  
Technology Policy ◽  
Policy Research ◽  
Mapping Method ◽  
Science And Technology Policy ◽  
Design Practice ◽  
Analysis Method ◽  
Environmental Sciences ◽  
University Of Colorado ◽  
The University

This workshop will create a space for discussion on environmental politics and its impact on design for sustainable transitions. It will help participants identify different sustainability discourses; create a space for reflection on how these discourses influence design practice; and consider the environmental and social implications of different discourses. The workshop will do this work by encouraging knowledge sharing, reflection and interpretative mapping in a participatory space where individuals will create their own discourse maps. This work is informed by my research “Mapping Climate Communication” conducted at the Centre for Science and Technology Policy Research (CSTPR) in the Cooperative Institute for Environmental Sciences (CIRES), the University of Colorado, Boulder. With this research project I developed a discourse mapping method based on the discourse analysis method of political scientists and sustainability scholars. Using my own work as an example, I will facilitate a process that will enable participants to create new discourse maps reflecting their own ideas and agendas.

scholarly journals Assessing Genetic Variants in Matched Biocompartments From Patients With Serous Ovarian Cancer

2021 ◽  
Vol 20 ◽  
pp. 153303382110279
Author(s):  
Brooke E. Sanders ◽  
Lisa Ku ◽  
Paul Walker ◽  
Benjamin G. Bitler
Keyword(s):  
Ovarian Cancer ◽  
Genetic Variants ◽  
Mutant Allele ◽  
Serous Ovarian Cancer ◽  
Brca Testing ◽  
Panel Testing ◽  
University Of Colorado ◽  
Gene Panel Testing ◽  
The University ◽  
Tumor Profiling

The clinical use of molecular tumor profiling (MTP) is expanding and there is an increasing use of MTP data to manage patient care. At the University of Colorado, 18 patients were diagnosed with primary serous ovarian cancer between 9/2015 and 6/2019 and consented for banking and analysis of tumor, ascites and plasma. All 18 patients had tumor and plasma samples that were sent for MTP, and 13 of 18 patients additionally had ascites collected and sent for MTP. 50-gene panel testing and BRCA testing were performed on primary tumor. BRCA genetic variants were more likely to be identified in plasma as compared to ascites or tumor, though not statistically significant ( P = 0.17). Co-occurring genetic variants between plasma and ascites were less common in comparison to co-occurring variants between tumor and plasma or tumor and ascites, though not statistically significant ( P = 0.68). Variants in KDR (VEGFR2) and TP53 were most likely to be conserved across all 3 biocompartments. Mutant allele frequencies (MAF) of individual genetic variants varied across biocompartments, though tended to be highest in the tumor, followed by ascites.

NEWS AND ANNOUNCEMENTS

PEDIATRICS ◽  
1974 ◽  
Vol 53 (1) ◽  
pp. 127-129
Keyword(s):  
Los Angeles ◽  
General Hospital ◽  
International Association ◽  
Health Professions ◽  
Colorado School ◽  
Allied Health Professions ◽  
University Of Colorado ◽  
School Of Medicine ◽  
The University ◽  
The Given

ALLIED HEALTH PROFESSIONS MEETINGS: The International Association of Enterostomal Therapists and the Southern California Para-urology Society will meet February 1-2, 1974, at the Sheraton Inn in Los Angeles. For information write Evonne Fowler, R.N., Department of Surgery, Harbor General Hospital, 1000 West Carson Street, Torrance, California 90509. NEWBORN RADIOLOGY SEMINAR: The University of Colorado School of Medicine will sponsor the second annual Newborn Radiology seminar, February 11-15, 1974, at the Given Institute of Pathobiology in Aspen.

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