scholarly journals Regional integration of long-term national dense GNSS network solutions

GPS Solutions ◽  
2019 ◽  
Vol 23 (4) ◽  
Author(s):  
Ambrus Kenyeres ◽  
J. G. Bellet ◽  
C. Bruyninx ◽  
A. Caporali ◽  
F. de Doncker ◽  
...  
Keyword(s):  
Regional Integration ◽  
Reference Frames ◽  
Collaborative Effort ◽  
High Quality ◽  
Combined Solution ◽  
Gnss Network ◽  
Constraint Approach ◽  
Gnss Networks

Abstract The EUREF Permanent Network Densification is a collaborative effort of 26 European GNSS analysis centers providing series of daily or weekly station position estimates of dense national and regional GNSS networks, in order to combine them into one homogenized set of station positions and velocities. During the combination, the station meta-data, including station names, DOMES numbers, and position offset definitions were carefully homogenized, position outliers were efficiently eliminated, and the results were cross-checked for any remaining inconsistencies. The results cover the period from March 1999 to January 2017 (GPS week 1000-1933) and include 31 networks with positions and velocities for 3192 stations, well covering Europe. The positions and velocities are expressed in ITRF2014 and ETRF2014 reference frames based on the Minimum Constraint approach using a selected set of ITRF2014 reference stations. The position alignment with the ITRF2014 is at the level of 1.5, 1.2, and 3.2 mm RMS for the East, North, Up components, respectively, while the velocity RMS values are 0.17, 0.14, and 0.38 mm/year for the East, North, and Up components, respectively. The high quality of the combined solution is also reflected by the 1.1, 1.1, and 3.5 mm weighted RMS values for the East, North, and Up components, respectively.

scholarly journals The Passive Microwave Neural Network Precipitation Retrieval Algorithm for Climate Applications (PNPR-CLIM): Design and Verification

2021 ◽  
Vol 13 (9) ◽  
pp. 1701
Author(s):  
Leonardo Bagaglini ◽  
Paolo Sanò ◽  
Daniele Casella ◽  
Elsa Cattani ◽  
Giulia Panegrossi
Keyword(s):  
Neural Network ◽  
Passive Microwave ◽  
Retrieval Algorithm ◽  
Climate Data ◽  
High Quality ◽  
Data Record ◽  
Global Precipitation ◽  
Climate Data Record

This paper describes the Passive microwave Neural network Precipitation Retrieval algorithm for climate applications (PNPR-CLIM), developed with funding from the Copernicus Climate Change Service (C3S), implemented by ECMWF on behalf of the European Union. The algorithm has been designed and developed to exploit the two cross-track scanning microwave radiometers, AMSU-B and MHS, towards the creation of a long-term (2000–2017) global precipitation climate data record (CDR) for the ECMWF Climate Data Store (CDS). The algorithm has been trained on an observational dataset built from one year of MHS and GPM-CO Dual-frequency Precipitation Radar (DPR) coincident observations. The dataset includes the Fundamental Climate Data Record (FCDR) of AMSU-B and MHS brightness temperatures, provided by the Fidelity and Uncertainty in Climate data records from Earth Observation (FIDUCEO) project, and the DPR-based surface precipitation rate estimates used as reference. The combined use of high quality, calibrated and harmonized long-term input data (provided by the FIDUCEO microwave brightness temperature Fundamental Climate Data Record) with the exploitation of the potential of neural networks (ability to learn and generalize) has made it possible to limit the use of ancillary model-derived environmental variables, thus reducing the model uncertainties’ influence on the PNPR-CLIM, which could compromise the accuracy of the estimates. The PNPR-CLIM estimated precipitation distribution is in good agreement with independent DPR-based estimates. A multiscale assessment of the algorithm’s performance is presented against high quality regional ground-based radar products and global precipitation datasets. The regional and global three-year (2015–2017) verification analysis shows that, despite the simplicity of the algorithm in terms of input variables and processing performance, the quality of PNPR-CLIM outperforms NASA GPROF in terms of rainfall detection, while in terms of rainfall quantification they are comparable. The global analysis evidences weaknesses at higher latitudes and in the winter at mid latitudes, mainly linked to the poorer quality of the precipitation retrieval in cold/dry conditions.

Doubly modifiable synapses: a model of short and long term auto-associative memory

1989 ◽  
Vol 238 (1291) ◽  
pp. 137-154 ◽  
Keyword(s):  
Long Term Memory ◽  
Short Term ◽  
High Quality ◽  
Stage Process ◽  
Short And Long Term ◽  
Associative Recall ◽  
Term Performance ◽  
Long Term Experience

Synapses that can be strengthened in temporary and persistent manners by two separate mechanisms are shown to have powerful advantages in neural networks that perform auto-associative recall and recognition. A multiplicative relation between the two weights allows the same set of connections to be used in a closely interactive way for short-term and long-term memory. Algorithms and simulations are described for the storage, consolidation and recall of patterns that have been presented only once to a network. With double modifiability, the short-term performance is dramatically improved, becoming almost independent of the amount of long-term experience. The high quality of short-term recall allows consolidation to take place, with benefits from the selection and optimization of long term engram s to take account of relations between stored patterns. Long-term capacity is greater than short-term capacity, with little or no deficit compared with that, obtained with singly modifiable synapses. Long-term recall requires special, simply implemented, procedures for increasing the temporary weights of the synapses being used to initiate recall. A consolidation algorithm is described for improving long-term recall when there is overlap between patterns. Confusional errors are reduced by strengthening the associations between non-overlapping elements in the patterns, in a two-stage process that has several of the characteristics of sleep.

scholarly journals MODERN LASER TECHNOLOGIES IN ENDODONTICS

2021 ◽  
Vol 16 (4) ◽  
pp. 20-24
Author(s):  
Aleksandra Polevaya ◽  
Eleonora Borisova ◽  
Larisa Polevaya
Keyword(s):  
Laser Radiation ◽  
Dental Treatment ◽  
Endodontic Treatment ◽  
Long Term Results ◽  
Cochrane Library ◽  
Pulp Tissue ◽  
High Quality ◽  
Laser Technologies

Subject. Pulp tissue diseases are characterized by a wide prevalence, which makes it possible to consider the quality of endodontic dental treatment one of the most urgent problems of modern dentistry. High-quality treatment of complicated forms of caries is the prevention of odontogenic inflammatory processes, which include periodontitis, periostitis, osteomyelitis, abscess and phlegmon. Therefore, new tools and methods of treatment of complicated forms of caries are proposed, aimed at long-term preservation of teeth as a functional unit of the dental system. Objective: to analyze modern laser technologies in the treatment of complicated forms of caries. Materials and methods. The study was based on the search and study of original articles on the endodontic treatment of complicated forms of caries using laser radiation in the databases: Russian state library, eLibrary, PubMed, the Cochrane Library, Google Scholar. The main selection of materials was carried out by keywords. Results. The literature review describes the positive properties of laser radiation, its mechanism of action, the basics of its use in endodontic treatment, and its application in various branches of dentistry. Conclusions. Analyzing the literature data, we can conclude that the use of laser technologies in the treatment of complicated forms of caries is promising. It is possible to achieve high-quality cleaning of the root canal system and the best long-term results. However, the literature does not sufficiently cover the use of Er, Cr:YSGG laser with a wavelength of 2780 nm in the treatment of purulent pulpitis and pulp necrosis. In addition, taking into account the possibility of using lasers at a therapeutic appointment, it is possible to significantly improve the professional level of a dentist, improving the quality of dental care, reducing the number of complications and preventing various dental diseases.

scholarly journals TREATMENT OF COLORECTAL CANCER COMPLICATED BY INTESTINAL OBSTRUCTION USING THE METHOD OF «FAST-TRACK» RECOVERY

2015 ◽  
Vol 174 (2) ◽  
pp. 39-41 ◽  
Author(s):  
V. L. Denisenko ◽  
Yu. M. Gain
Keyword(s):  
Public Health ◽  
Fast Track ◽  
High Tech ◽  
Complex Treatment ◽  
Economic Costs ◽  
High Quality ◽  
Short And Long Term ◽  
Fast Track Recovery

A medical trend which is currently gaining strength includes the complex treatment based on the concept of «fast-track» recovery in oncology. An application of modern high-tech approaches allowed minimizing the terms of treatment, shortening economic costs and getting the highest final results. It provides a high quality treatment. Given method could exclude an interim treatment stages, sufficiently reduces terms of general treatment and rehabilitation of patients and could succeed in high quality of life for the patients in short- and long-term period. The authors present the results of successful clinical surgery of 78 patients using this method in public health.

EVALUATION OF RESULTS OF ENDOSCOPIC RESECTION OF MUCOSA BY DISSECTION IN SUBMUCOSA IN TREATMENT FOR EARLY GASTRIC CANCER

2017 ◽  
Vol 63 (2) ◽  
pp. 294-297
Author(s):  
Marina Grinkevich ◽  
Viktor Klimenko ◽  
Aleksandr Shcherbakov ◽  
Oleg Tkachenko
Keyword(s):  
Quality Of Life ◽  
Gastric Cancer ◽  
Early Gastric Cancer ◽  
Endoscopic Resection ◽  
Submucosal Layer ◽  
High Quality ◽  
Safe Method ◽  
Radical Treatment

The aim of the study was to evaluate the effectiveness of endoscopic resection of mucosa by dissection in submucosa in treatment for early gastric cancer. The study included 78 patients with early differentiated gastric cancer of stages T1aN0M0 (65) and T1bN0M0 (13) who underwent endoscopic resection of mucosa by dissection in the submucosal layer at the N.N. Petrov Research Institute of Oncology. According to results of our study endoscopic resection of mucosa by dissection in the submucosal layer in early gastric cancer is highly effective (98.7%) and is a relatively safe method of organ-preserving radical treatment with a high quality of life in the long-term period, which allows it to be recommended as an option of choice for this pathology.

Electroencephalographic Evidence on the Strategies of Adaptation to the Factors of Monotony

2009 ◽  
Vol 12 (1) ◽  
pp. 32-45 ◽  
Author(s):  
Elena V. Aslanyan ◽  
Valery N. Kiroy
Keyword(s):  
Power Plants ◽  
Work Performance ◽  
Brain Activity ◽  
The State ◽  
High Quality ◽  
High Lability ◽  
Occupational Selection ◽  
The Brain

In a series of studies, in which 19 apparently healthy male volunteers participated, on the basis of a comparative analysis of the bioelectric brain activity and work performance, it is shown that two strategies of adaptation to the factors of monotony are possible. One of them is based on the maintenance of a high quality of activity even at the price of a considerable reduction in the functional state of the brain; the second is based on the maintenance of the functional status of the brain even at the expense of the short-term loss of control over realizable performance. The factor conditioning the long term inability to support continual high quality of performance under the conditions of monotony is a high lability in nervous processes. The resistance to the effects of the factors of monotony is connected, on the other hand, with the low lability of nervous processes with a certain predominance of excitatory processes over inhibiting processes. The electrographic correlates of the development of the state of monotony represent an increase in the EEG of an alert person of the slow spectra (theta and alpha), and also beta-2 waves, as well as a reduction in the intrahemispheric coherence of alpha-waves. These results can be used for the development of control systems for the state of the operators who work in conditions of monotony (pilots, the operators of electric trains, the operators of power plants, including atomic power plants, and others), as well as in the occupational selection of individuals for jobs involving work under such conditions.

scholarly journals FTA Cards for Preservation of Nucleic Acids for Molecular Assays: A Review on the Use of Cytologic/Tissue Samples

2018 ◽  
Vol 142 (3) ◽  
pp. 308-312 ◽  
Author(s):  
Gilda da Cunha Santos
Keyword(s):  
Nucleic Acids ◽  
Molecular Techniques ◽  
Long Distance ◽  
High Quality ◽  
Molecular Assays ◽  
Fta Cards ◽  
Long Term Storage ◽  
Term Storage

Context.— Traditional methods for storing histologic and cytologic specimens for future use in molecular assays have consisted of either snap-freezing with cryopreservation or formalin-fixing, paraffin-embedding the samples. Although snap-freezing with cryopreservation is recommended for better preservation of nucleic acids, the infrastructure and space required for archiving impose challenges for high-volume pathology laboratories. Cost-effective, long-term storage at room temperature; relatively easy shipment; and standardized handling can be achieved with formalin-fixed, paraffin-embedded samples, but formalin fixation induces fragmentation and chemical modification of nucleic acids. Advances in next-generation sequencing platforms, coupled with an increase in diagnostic, prognostic, and predictive molecular biomarkers have created a demand for high-quality nucleic acids. To address issues of the quality of nucleic acid and logistics in sample acquisition, alternatives for specimen preservation and long-term storage have been described and include novel universal tissue fixatives, stabilizers, and technologies. Objective.— To collect, retrieve, and review information from studies describing the use of nucleic acids recovered from cytologic/tissue specimens stored on Flinders Technology Associates (FTA, GE Whatman, Maidstone, Kent, United Kingdom) cards for downstream molecular applications. Data Sources.— An electronic literature search in the PubMed (National Center for Biotechnology Information, Bethesda, Maryland) database allowed the selection of manuscripts addressing the use of FTA cards for storage of cytologic samples for molecular analysis. Only articles published in English were retrieved. Conclusions.— The use of FTA cards is a versatile method for fostering multicenter, international collaborations and clinical trials that require centralized testing, long-distance shipment, and high-quality nucleic acids for molecular techniques. Studies with controlled temperature are required to test the quality of recovered RNA after long-term storage.

Determinants of Staff Behaviour in Long-term Care

1983 ◽  
Vol 11 (1) ◽  
pp. 4-17 ◽  
Author(s):  
P. A. Woods ◽  
Chris Cullen
Keyword(s):  
Quality Of Care ◽  
Behaviour Change ◽  
Long Term Care ◽  
Poor Quality ◽  
High Quality ◽  
Term Care ◽  
Organizational Variables ◽  
Relative Lack

For some years now, working with long-stay populations such as the mentally handicapped and elderly mentally infirm has been a “Cinderella” area with difficulties in attracting high quality staff and resources. This has resulted in poor quality of care. There may be many reasons for the relative lack of interest shown by professionals in the problems of long-term care, but two stand out as potentially important:(a) the rate of client behaviour change and(b) the permanency of client behaviour change.Within the areas of out-patient neuroses and other similar nonchronic problems, it is often expected that change can be brought about relatively quickly by trained therapists (cf. Marks, 1981a, b). With chronic problems, however, the situation is quite different. Usually change is only brought about slowly, if at all.Secondly, with an out-patient population, given new ways with which to cope with their problems, we hope that somehow the natural contingencies will “trap” (Baer and Wolf, 1970) the new repertoires. The client gets better, stays better, and does not come back. From our own experience of this type of work, the situation is rarely so sanguine and with chronic populations, there isn't usually even much reason for hope. We are all too familiar with changes occurring and then the group of clients begins rapidly to slip back to where they started from (or beyond!). We have become accustomed to blaming poor motivation, inadequate training, organizational variables, Hawthorne effects, and so on. Almost anything except ourselves.In this paper, we look at some failures and some relative successes in achieving desired change in long-stay institutions, and ask the questions “How?” and “Why?”. It should be obvious before we go any further that we do not have definite answers, but the questions are still worth asking. Work with long-stay populations can be extremely exasperating and demanding, but appeals to abandon the large institutions where such groups reside are defeatist.

scholarly journals Follow-Up Care Experiences and Perceived Quality of Care Among Long-Term Survivors of Breast, Prostate, Colorectal, and Gynecologic Cancers

2014 ◽  
Vol 10 (4) ◽  
pp. e231-e239 ◽  
Author(s):  
Kathryn E. Weaver ◽  
Noreen M. Aziz ◽  
Neeraj K. Arora ◽  
Laura P. Forsythe ◽  
Ann S. Hamilton ◽  
...  
Keyword(s):  
Quality Of Care ◽  
Perceived Quality ◽  
High Quality ◽  
Gynecologic Cancers ◽  
Perceived Quality Of Care ◽  
Follow Up Care ◽  
Long Term Survivors

Long-term survivors commonly report follow-up care years after their diagnosis; however, many patients' follow-up lacks important components. Care is more likely to be rated as high quality when one main provider is identified and an oncology specialist is involved.

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