scholarly journals PROPOSAL OF THE MONITORING METHODOLOGY OF THE GREEN HAWKER Aeshna viridis Eversmann, 1836 (Odonata: Aeshnidae)

2021 ◽  
Vol 358 (57) ◽  
pp. 15-28
Author(s):  
Krystian A. OŁDAK ◽  
Keyword(s):  
Water Body ◽  
Strong Dependence ◽  
Strong Association ◽  
Condition Assessment ◽  
Habitats Directive ◽  
Assessment Methodology ◽  
Habitat Condition ◽  
Pilot Studies ◽  
Research Areas ◽  
Made In

Aeshna viridis, a species of dragonfly of the family Aeshnidae, is listed in Appendix II of the Bern Convention as well as Annex IV of the Habitats Directive. The decline in the range and abundance of A. viridis is associated with a strong dependence of this species on the presence of Stratiotes aloides in the water body and results from a decrease in the number of suitable habitats. So far, attempts to develop a monitoring methodology for this species have been made in several European countries, including Sweden, Denmark and the Netherlands. This article presents a proposal for a monitoring methodology based on the evaluation of indicators of population condition in the form of exuviae density and number of adults, and indicators of habitat condition: the area of the water body covered by S. aloides, the presence of dense and undivided patches of S. aloides, succession in the water body and anthropopressure. The concept of population condition assessment methodology is based on observation of adult specimens and collecting exuviae, avoiding larvae sampling, which is invasive and associated with technical difficulties. The concept of the habitat condition assessment methodology, in turn, is based on strong association between A. viridis and S. aloides. It is proposed to monitoring A. viridis population on a minimum of several research areas within the country, on a two-year cycle. The presented proposal of the monitoring methodology requires pilot studies to be carried out within the A. viridis localities in order to determine the validity of assumptions made in the monitoring methodology.

PCCP Condition Assessment Methodology: What Is Right for You?

2012 ◽  
Author(s):  
Michael D. Gossett ◽  
Graham E. C. Bell ◽  
Steven R. Fox ◽  
Keith R. Bushdiecker ◽  
Richard Pousard, Jr.
Keyword(s):  
Condition Assessment ◽  
Assessment Methodology

scholarly journals A Hierarchical Spatial Framework and Database for the National River Fish Habitat Condition Assessment

Fisheries ◽  
2011 ◽  
Vol 36 (9) ◽  
pp. 436-449 ◽  
Author(s):  
Lizhu Wang ◽  
Dana Infante ◽  
Peter Esselman ◽  
Arthur Cooper ◽  
Dayong Wu ◽  
...  
Keyword(s):  
Fish Habitat ◽  
Condition Assessment ◽  
Habitat Condition ◽  
Spatial Framework ◽  
River Fish

scholarly journals Decontamination methods of personal protective equipment for repeated utilization in medical/surgical settings

2020 ◽  
Vol 8 (34) ◽  
pp. 27-39
Author(s):  
Abdurrahman Kharbat ◽  
Adin Mizer ◽  
Mimi Zumwalt
Keyword(s):  
Personal Protective Equipment ◽  
Healthcare Workers ◽  
Protective Equipment ◽  
Pilot Studies ◽  
Medical Supplies ◽  
Policy Statements ◽  
Repeated Use ◽  
Meta Analyses ◽  
N95 Respirators ◽  
Made In

The COVID-19 pandemic has affected citizens and healthcare workers worldwide due to a number of important factors. The transmission of the SARS CoV-2 microorganism, the pathogen that causes COVID-19 infection, occurs through droplet and aerosol spread due to coughs and sneezes from infected patients. A panicked public began hoarding medical supplies and personal protective equipment (PPE), leaving healthcare workers to care for patients without adequate protection. A literature review was conducted to better understand the options available to hospital and healthcare system administrators as they develop necessary protocols for the conservation and possible reuse of PPE. This review is based upon the peer-reviewed studies of various scientific investigators, biotechnology researchers, governmental agency health officials, including meta-analyses, preliminary/pilot studies, and policy statements. Current findings indicate that extended usage of N95 respirators is practical since there are methods available for the decontamination/repeated use of N95 respirators. In evaluating the efficacy of such methods, the safety of healthcare workers is important in deciding which method to recommend. Available evidence supports the use of the Bioquell Hydrogen Peroxide Vapor (HPV) system for decontaminating N95 respirators. Information on other PPE will also be discussed about more specific items. Informed decisions regarding the policies of hospitals and healthcare systems must be considered, and with the safety of healthcare workers in mind, both factors influenced the recommendations made in this comprehensive review.

Steady State Eeg as a Measure of Peripheral Light Loss

1986 ◽  
Vol 30 (13) ◽  
pp. 1249-1253
Author(s):  
Richard T. Gill ◽  
Kevin M. Kenner ◽  
Andrew M. Junker
Keyword(s):  
Steady State ◽  
Stimulus Intensity ◽  
Line Of Sight ◽  
Strong Response ◽  
Experimental Conditions ◽  
Pilot Studies ◽  
Sensitive Measure ◽  
Stimulus Parameters ◽  
Light Loss ◽  
Made In

The objective of this research was to assess the feasability of using ElectroEncephaloGrams (EEG) to measure the extent of acceleration induced Peripheral Light Loss (PLL). Two pilot studies were conducted to determine if an EEG response to peripherally localized stimuli could be detected and to establish the stimulus parameters that would yield a strong response. Results revealed: (1) identifiable EEG responses to stimuli located as far as ± 60 degrees from the foveal line-of-sight; (2) higher stimulus intensity and, in particular, higher depth of modulation yielded stronger EEG responses; and (3) coherence was found to be a more sensitive measure than RMS Power or Gain. These findings were used to establish the experimental conditions that were used in a study whose objective was to estimate the minimum time necessary to detect the presence, or absence, of an EEG response to peripherally localized stimuli. Results revealed a reliabe determination for stimuli located at ± 45 degrees could be made in 20 seconds or less.

scholarly journals Analysis Of Reed Resource Dynamics In Water Bodies Of Eastern Latvia

2015 ◽  
Vol 1 ◽  
pp. 252
Author(s):  
E. Čubars ◽  
G. Noviks
Keyword(s):  
Shallow Lakes ◽  
Water Body ◽  
Human Activities ◽  
Hydrological Regime ◽  
Climatic Conditions ◽  
Water Bodies ◽  
Natural Processes ◽  
Resource Dynamics ◽  
Main Factors ◽  
Made In

The paper shows the results obtained during the research of reed dynamics revealing that in Eastern Latvia 20 lakes and pisciculture farms are potentially important for the reed extraction. In 2008, the reed resources there covered a territory of approximately 2300 ha. The ortophoto images of potentially important water bodies made in 1997, 2005 and 2008 were analyzed using the computer program ArcMap. The reed growth develops differently in every water body, but in general the eutrophication of water bodies and the enlargement of reed-covered areas can be observed. The most rapidly the reed occupies new territories in pisciculture farms and shallow lakes. The analysis of reed resource dynamics show that reed-covered areas in this region are expanding every year. The main factors that influence the distribution of reed growths refer to human activities, climatic conditions, hydrological regime in water bodies and natural processes of eutrophication.

scholarly journals The Choice of Priority Actions Aimed at Ecological Rehabilitation of Standing and Low-flowing Lakes

2017 ◽  
Author(s):  
Keyword(s):  
Water Body ◽  
Calculated Data ◽  
Biogenic Element ◽  
Total Phosphorous ◽  
Internal Sources ◽  
Main Input ◽  
High Degree ◽  
Optimal Set ◽  
Made In

Methods of the choice of priority actions in rehabilitation of standing or lowflowing lakes whose unsatisfactory status is caused by either high degree of euthrophication or pollution with man-caused components or combination of these factors are presented. The methods are to be applied after taking of the decision on the necessity of a specific water body rehabilitation and it enables to calculate the main input flows of pollutants and biogenic material on the basis of field observations and calculated data for the water body and its catchment area; it enables to rate these flows and to determine the optimal set of methods for the water body effective rehabilitation and to forecast its conditions after implementation of these measures. The choice of de-euthrophication actions is based on the assessment of the total phosphorous input flows from external and internal sources to the water body whose limiting biogenic element is phosphorous, with their subsequent rating. The choice of actions connected with the man-caused ingredients impact mitigation is to be made in compliance with the same principle. Methods of determination of the total phosphorous or man-caused pollutants inflows to a water body from external and internal sources have been proposed. An example of the rehabilitation measures choice for euthrophic standing lake and low-flowing reservoir with low trophic status but actively being polluted with man-caused ingredients is presented.

Structure of Mixing Layers and Jets

1991 ◽  
Vol 44 (3) ◽  
pp. 119-153 ◽  
Author(s):  
F. O. Thomas
Keyword(s):  
Graduate Student ◽  
Mixing Layer ◽  
Mixing Layers ◽  
Jet Flows ◽  
Interested Reader ◽  
Specific Research ◽  
Research Areas ◽  
Turbulent Transition ◽  
Substantial Progress ◽  
Made In

This article is intended as a brief review of the substantial progress that has been made in recent years regarding our understanding of the structure of incompressible mixing layers and jets. The work has been aimed at the graduate student who possesses a familiarity with the general areas of laminar-turbulent transition and turbulence, but is not familiar with the specific research areas involving mixing layer and jet flows. The article should be of assistance both in assimilating the vast body of literature that exists in this field as well as in deciding what avenues present fertile grounds for investigation. Since a number of the topics described are relatively new, it is believed that the article will also be of interest to the specialist. The review should not be considered exhaustive but rather should serve to guide the interested reader to more detailed works.

scholarly journals Identification and Asymptotic Approximations: Three Examples of Progress in Econometric Theory

2017 ◽  
Vol 31 (2) ◽  
pp. 107-124 ◽  
Author(s):  
James L. Powell
Keyword(s):  
Asymptotic Approximations ◽  
Test Statistics ◽  
Weak Instruments ◽  
Empirical Economics ◽  
Nonparametric Models ◽  
Research Areas ◽  
Endogenous Regressors ◽  
Related Theme ◽  
Made In

In empirical economics, the size and quality of datasets and computational power has grown substantially, along with the size and complexity of the econometric models and the population parameters of interest. With more and better data, it is natural to expect to be able to answer more subtle questions about population relationships, and to pay more attention to the consequences of misspecification of the model for the empirical conclusions. Much of the recent work in econometrics has emphasized two themes: The first is the fragility of statistical identification. The other, related theme involves the way economists make large-sample approximations to the distributions of estimators and test statistics. I will discuss how these issues of identification and alternative asymptotic approximations have been studied in three research areas: analysis of linear endogenous regressor models with many and/or weak instruments; nonparametric models with endogenous regressors; and estimation of partially identified parameters. These areas offer good examples of the progress that has been made in econometrics.

scholarly journals Progress in the development of general practice / family medicine in the city of Saint Petersburg (Russian Federation)

2020 ◽  
Vol 23 (4) ◽  
pp. 19-31
Author(s):  
Uel Gillan ◽  
Rob McQuiston ◽  
Oliver Slevin
Keyword(s):  
Family Medicine ◽  
Russian Federation ◽  
Comprehensive Evaluation ◽  
Early Years ◽  
Pilot Studies ◽  
Saint Petersburg ◽  
Family Practitioners ◽  
The City ◽  
Made In

In previous years, indeed in some respects preceding the establishment of the Russian Federation, consideration had been given to the establishment of new approaches to general medical practice in Russia. Particular attention centred upon the establishment of Family Medicine and the preparation of doctors as Family Practitioners to advance this initiative. A number of pilot studies were initiated, including in the city of Saint Petersburg. These were intended to provide real-world opportunities to test and develop new and more effective approaches to primary health care that would more efficiently integrate with secondary care. The authors were involved in the initial pilot studies in the mid to late 1990s and subsequent follow-up projects to further advance the initiatives in the early years of the 21st century (20022010). This brief paper reports on a review of progress made in respect of the above initiatives. It is not at this time a comprehensive evaluation of the healthcare systems as they now operate. The authors nevertheless present some indications of satisfactory progress across a range of practices, some insights into challenges that have arisen, and some suggestions that might be helpful in the current rounds of strategic planning for health.

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