scholarly journals Comparative analysis of multiplex AtheNA Multi-Lyte ANA test system and conventional laboratory methods to detect autoantibodies

2008 ◽  
pp. 88-98 ◽  
Author(s):  
Ilza Salamunic ◽  
Branka Paukovic Sekulic ◽  
Adela Galetovic ◽  
Leida Tandara ◽  
Dusanka Martinovic Kaliterna
Keyword(s):  
Comparative Analysis ◽  
Test System ◽  
Laboratory Methods

scholarly journals Experimental methods for studying the wetting properties of oil reservoirs: a review

2019 ◽  
pp. 135-149 ◽  
Author(s):  
A. A. Ivanova ◽  
N. A. Mitiurev ◽  
S. N. Shilobreeva ◽  
A. N. Cheremisin
Keyword(s):  
Comparative Analysis ◽  
Recent Progress ◽  
Experimental Methods ◽  
Oil Reservoirs ◽  
Practical Implementation ◽  
Laboratory Methods ◽  
Wetting Properties ◽  
Advantages And Disadvantages ◽  
Unconventional Oil ◽  
Oil Formation

The theoretical principles of the laboratory methods for studying the wettability of unconventional oil formation rocks are discussed and examples of their practical implementation are presented. The comparative analysis of the advantages and disadvantages of each method is presented. It is shown that despite the recent progress in the development of methods for determining the wettability of rocks, they still need to be improved. Examples of their possible improvements are discussed.

scholarly journals Comparative analysis of clinical and laboratory methods for diagnosing streptococcal sore throat

10.2223/1278 ◽  
2005 ◽  
Vol 81 (1) ◽  
pp. 23-28 ◽  
Author(s):  
Ana Gabriela P. dos Santos ◽  
Eitan N. Berezin
Keyword(s):  
Comparative Analysis ◽  
Sore Throat ◽  
Laboratory Methods

scholarly journals Atopic Status in Children with Asthma and Respiratory Allergies—Comparative Analysis of Total IgE, ImmunoCAP Phadiatop/fx5 and Euroimmun Pediatric Immunoblot

Sinusitis ◽  
2021 ◽  
Vol 6 (1) ◽  
pp. 1-14
Author(s):  
Snezhina Lazova ◽  
Marta Baleva ◽  
Stamatios Priftis ◽  
Emilia Naseva ◽  
Tsvetelina Velikova
Keyword(s):  
Allergic Rhinitis ◽  
Comparative Analysis ◽  
Gold Standard ◽  
Specific Ige ◽  
Food Allergens ◽  
Laboratory Methods ◽  
Total Ige ◽  
Atopic Status ◽  
Respiratory Allergies ◽  
Children With Asthma

Introduction: An atopic status assessment (skin prick test or specific immunoglobulin (sIgE)) in asthmatic children is considered a milestone in identifying potential risk factors and triggers provoking loss of asthma control and asthma exacerbation. Objective: The study aims to perform a comparative analysis of different laboratory methods for a serological assessment of an atopic status in asthma and respiratory allergies in children. Material and methods: A total of 86 children were included, all of whom were diagnosed with bronchial asthma, aged from 5 to 17 years and screened for total IgE level using enzyme-linked immunosorbent assay (ELISA). In 48 randomly selected children, we performed a semi-quantitative serological in vitro assessment of the specific IgE antibodies against food and aeroallergen, using two different laboratory methods—Euroimmun Immunoblot and ImmunoCAP (Phadiatop/fx5). Results: In 70% of the children with a history of allergies, and 65.3% without clinically manifested allergies, multiscreen test ImmunoCAP Phadiatop/fx5 showed positivity and confirmed atopy. Our results showed a significant moderate to strong correlation between multiscreen ImmunoCAP Phadiatop/fx5, and Euroimmun specific IgE titers against aero-allergens—cats, mites, tree mix and food allergens—soy, wheat (р = 0.006), rice, р = 0.090), apple р = 0.007) and peanut. A sensitivity of 63% and specificity of 73.5% was observed for EUROIMMUN Pediatric (food allergens, IgE titer > 1) compared with the gold standard ImmunoCap/fx5. The mean value of total IgE is significantly higher in children with asthma and concomitant with allergic rhinitis compared to those without allergic rhinitis (mean 202.52 U/mL, IQR 102.50 (24.20–363.95) vs. 316.68, IQR 261.00 (109.20–552.50), p = 0.005). Conclusion: Establishing the spectrum of the most common respiratory and food allergens is an essential factor for maintaining asthma control, both through a strategy to avoid allergen exposure and by developing a recommendation plan. The immunoblotting technique is easily applicable in daily clinical and laboratory practice. It is also a cost-effective and reliable alternative to the “gold standard” ImmunoCAP Phadiatop/fx5 in diagnosing atopy in children.

Comparative analysis of clinical and laboratory methods for diagnosing streptococcal sore throat

2005 ◽  
Vol 81 (1) ◽  
pp. 23-28 ◽  
Author(s):  
Ana Gabriela P. dos Santos ◽  
Eitan N. Berezin
Keyword(s):  
Comparative Analysis ◽  
Sore Throat ◽  
Laboratory Methods

scholarly journals Impact Analysis of Large-Scale Wind Farms Integration in Weak Transmission Grid from Technical Perspectives

Energies ◽  
2020 ◽  
Vol 13 (20) ◽  
pp. 5513
Author(s):  
Shah Rukh Abbas ◽  
Syed Ali Abbas Kazmi ◽  
Muhammad Naqvi ◽  
Adeel Javed ◽  
Salman Raza Naqvi ◽  
...  
Keyword(s):  
Comparative Analysis ◽  
Power System ◽  
Power Quality ◽  
Seasonal Variations ◽  
Large Scale ◽  
Reactive Power ◽  
Wind Farms ◽  
Test System ◽  
Active Power ◽  
Wake Effect

The integration of commercial onshore large-scale wind farms into a national grid comes with several technical issues that predominately ensure power quality in accordance with respective grid codes. The resulting impacts are complemented with the absorption of larger amounts of reactive power by wind generators. In addition, seasonal variations and inter-farm wake effects further deteriorate the overall system performance and restrict the optimal use of available wind resources. This paper presented an assessment framework to address the power quality issues that have arisen after integrating large-scale wind farms into weak transmission grids, especially considering inter-farm wake effect, seasonal variations, reactive power depletion, and compensation with a variety of voltage-ampere reactive (Var) devices. Herein, we also proposed a recovery of significant active power deficits caused by the wake effect via increasing hub height of wind turbines. For large-scale wind energy penetration, a real case study was considered for three wind farms with a cumulative capacity of 154.4 MW integrated at a Nooriabad Grid in Pakistan to analyze their overall impacts. An actual test system was modeled in MATLAB Simulink for a composite analysis. Simulations were performed for various scenarios to consider wind intermittency, seasonal variations across four seasons, and wake effect. The capacitor banks and various flexible alternating current transmission systems (FACTS) devices were employed for a comparative analysis with and without considering the inter-farm wake effect. The power system parameters along with active and reactive power deficits were considered for comprehensive analysis. Unified power flow controller (UPFC) was found to be the best compensation device through comparative analysis, as it maintained voltage at nearly 1.002 pu, suppressed frequency transient in a range of 49.88–50.17 Hz, and avoided any resonance while maintaining power factors in an allowable range. Moreover, it also enhanced the power handling capability of the power system. The 20 m increase in hub height assisted the recovery of the active power deficit to 48%, which thus minimized the influence of the wake effect.

Impact of Different PQ Models of Wind Turbine Generating Units (WTGUs) on System Voltage Performance

2017 ◽  
Vol 18 (4) ◽  
Author(s):  
Tukaram Moger ◽  
Thukaram Dhadbanjan
Keyword(s):  
Comparative Analysis ◽  
Performance Analysis ◽  
Wind Turbine ◽  
Power Factor ◽  
Power Output ◽  
Reactive Power ◽  
Test System ◽  
Variable Speed ◽  
Voltage Dependent ◽  
Voltage Performance

AbstractThis paper presents the voltage performance analysis of the system with various types of wind turbine generating units (WTGUs). A detailed voltage performance analysis is carried out by considering the different PQ models used for computing the reactive power output of the WTGUs (fixed/semi-variable speed and variable speed WTGUs). The different PQ models of fixed/semi-variable speed WTGUs incorporated for the studies are voltage dependent model, voltage independent model, power factor based model, and PX model. In addition, the variable speed WTGUs are also considered in different fixed power factor mode of operation. Based on these models, a comparative analysis is presented. A modified 27-bus equivalent distribution test system with dispersed wind generation is considered for the studies. Further, the case studies have been carried out by considering the various wind power output levels of WTGUs to examine its impact on system voltage performance. From the comparative analysis, the power factor based model can be the best choice over the other models (which are based on voltages) for the system studies with fixed/semi-variable speed WTGUs.

scholarly journals Impact of Quadrature Booster on Power-System State Estimation in Polar Coordinates

Energies ◽  
2021 ◽  
Vol 14 (18) ◽  
pp. 5992
Author(s):  
Tomasz Okon ◽  
Kazimierz Wilkosz
Keyword(s):  
Comparative Analysis ◽  
Power System ◽  
Coordinate System ◽  
State Estimation ◽  
Phase Shifter ◽  
Test System ◽  
The State ◽  
Polar Coordinate System ◽  
Estimation Process ◽  
Number Of Iterations

The paper concerns the estimation of the state of a power system in which there is a phase shifter called a quadrature booster. The aim of the paper is a comparative analysis of two different cases including the quadrature booster in the state estimation. In the first case, the quadrature booster is represented by a model consisting of two real voltage sources, one in series with a power line and the other in a shunt branch. In the second case, in the power system model, the real branch with the quadrature booster is represented as off at the end where the considered quadrature booster is actually installed. The state estimation is assumed to be carried out in the polar coordinate system. The properties of the state estimation are characterized by: the number of iterations in the calculation process, the index of conditioning of the matrix of coefficients in the equations to be solved (cond(G)), and ratio Je/Jm, which is a measure of the accuracy of the estimation. Using IEEE 14-bus test system, investigations are carried out in such a way as to cover the entire state space of the power system as possible. In the investigations, Monte Carlo experiments are carried out for each of the considered cases of the state estimation. Each of these cases is also analyzed from the point of view of the assumed definition of the state estimation. Investigations show that in the first of the previously described cases, the state estimation is more accurate, but there are more iterations in the calculations and worse conditioning of the estimation process. The comparative analysis also shows that, the accuracy of the results obtained in each of the considered cases is practically independent of the coordinate system in which the estimation calculations are performed. Taking into account the number of iterations in the estimation process and index cond(G), it can be concluded that the implementation of each of the above-mentioned estimation cases in the rectangular coordinate system is more reasonable.

Sign in / Sign up

Export Citation Format

Share Document