scholarly journals SIZE OF THE SAMPLE NECESSARY FOR THE ACCURATE DETERMINATION OF THE SANITARY QUALITY OF SHELL OYSTERS

1913 ◽  
Vol 3 (7) ◽  
pp. 705-708
Author(s):  
George H. Smith
Keyword(s):  
Accurate Determination

A Rapid and Accurate X-Ray Determination of the Rare Earths Elements in Solid or Liquid Materials using the Double Dilution Method

1968 ◽  
Vol 12 ◽  
pp. 546-562
Author(s):  
R. Tertian
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Accurate Determination ◽  
Fluorescence Analysis ◽  
Dilution Method ◽  
Practical Advantage ◽  
X Ray ◽  
The Matrix

AbstractThe double dilution method has many important advantages. For any element to be determined, let us say A, It enables us to control or calculate the matrix factor (sum of the absorption end enhancement effects) for the sample being Investigated towards A radiation, and it furnishes corrected Intensities which are strictly proportional to A concentration. Thus the results are exact, whatever the general composition of the sample, their accuracy depending only on the quality of measurement and preparation. Another major practical advantage is that the method does not require systematic calibration but only a few permanent standards consisting of a pure compound or of an accurately known sample.The procedure has been tested successfully for accurate determination of rare earth elements using, for solid materials such as ores and oxide mixtures, the borax fusion technique. It also can be readily applied to liquids. All the rare earth elements can be titrated by that method, as well as yttrium, thorium and, if necessary, all the elements relevant to X-ray fluorescence analysis. The concentration range considered for solids is of one comprised between 0.5 and 100 % and, with a lesser accuracy, between 0.1 and 0-5 % Examples are given relative to the analysis of various ores. Finally it rcust be pointed out that the method is universal and applies to the analysis of every solid, especially ores, provided that they can be converted to solid or liquid solutions. It appears that most industrial analyses can be worked on In this way.

scholarly journals Proposed Modifications to AOAC 996.06, Optimizing the Determination of Trans Fatty Acids: Presentation of Data

2008 ◽  
Vol 91 (1) ◽  
pp. 92-97 ◽  
Author(s):  
Brent Rozema ◽  
Barbara Mitchell ◽  
Doug Winters ◽  
Andrew Kohn ◽  
Darryl Sullivan ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Trans Fatty Acids ◽  
Accurate Determination ◽  
Trans Fat ◽  
Independent Research ◽  
Validation Data ◽  
Fatty Acid Data ◽  
Research Initiatives

Abstract The increased focus on the accuracy of Trans fatty acid data generated using current methodologies has resulted in research initiatives to optimize the quality of these assays. In this study, scientists combined the established methodology from AOAC 996.06 and the American Oil Chemists Society method Ce 1h-05, as well as other independent research. As a result, method modifications are proposed that could allow for a more accurate determination of Trans fat than the current AOAC 996.06 method. Validation data from this study are presented. The authors encourage peer review and offer to facilitate a collaborative validation to update AOAC 996.06.

Improving quality of care and reducing costs with angiogenesis-specific imaging tests in metastatic breast cancer.

2012 ◽  
Vol 30 (34_suppl) ◽  
pp. 150-150
Author(s):  
Carolyn Bodnar ◽  
L. Clark Paramore ◽  
Kevin B. Knopf
Keyword(s):  
Breast Cancer ◽  
Quality Of Care ◽  
Metastatic Breast Cancer ◽  
Accurate Determination ◽  
Metastatic Breast ◽  
Base Case ◽  
Test Results ◽  
The Impact

150 Background: Anti-angiogenesis (AA) drugs (e.g., bevacizumab) are expensive and their clinical benefit in metastatic breast cancer (MBC) has been challenged. Healthcare reform and financial pressures prioritize programs which improve patient quality of care and reduce costs of unnecessary care. Angiogenesis-specific imaging tests (A-IT) under development have potential to offer earlier, accurate determination of response. For A-IT-identified responders, AA treatment would be continued. For patients identified as non-responders, futile AA treatment and associated toxicities can be avoided and alternative therapies initiated. Methods: A decision-tree model was developed to estimate the impact of A-IT from determination of AA therapy eligibility through to disease progression. Key decision nodes were presence/absence of A-IT (assessing change in biomarker expression across 2 PET/CT scans: at AA eligibility, then after one cycle of AA), A-IT sensitivity/specificity (SE/SP) and clinician adherence to test results (tied to belief that results are valid enough to stop AA therapy). Key model inputs (and base case values): 1) median time to progression (TTP) for current MBC patients on AA therapies (9.5 months); 2) median TTP for A-IT identified responders (13 months); 3) costs of bevacizumab, one cycle ($5,200); 4) percentage of AA patients with hemorrhage (4%); 5) costs of hemorrhaging, per event ($14,694); 6) per patient costs for A-IT ($6,000); 7) estimated SE/SP of A-IT – 95%/75%; and 8) clinician adherence to test results (75%). Results: Based on a cohort of 100 MBC patients, use of A-IT results in 29 patients avoiding futile AA therapy with a saving of $460,000, versus a scenario where A-IT was not used. One-way threshold sensitivity analysis shows A-IT is cost-saving if SP >62% or when clinician adherence is ≥63%; results are not sensitive to AA hemorrhage rate. Conclusions: Use of A-IT could improve quality of care by optimizing AA therapy, i.e., by identifying responders who will experience survival benefit and non-responders who can avoid futile therapy and toxicity risks. Significant cost savings may be possible as a result of early determination of response to AA drugs.

scholarly journals METHODS OF DIAGNOSING STUDENTS’ KNOWLEDGE OF CONDUCTING AND CHORAL DISCIPLINES

2020 ◽  
Vol 1 (1) ◽  
pp. 36-42
Author(s):  
Ivan Martynenko
Keyword(s):  
Academic Success ◽  
Accurate Determination ◽  
State Standards ◽  
Educational Process ◽  
Music Teacher ◽  
Modular System ◽  
Musical Works ◽  
Methods Of Control

Object. The article covers the issues of diagnostics of academic success of students of the Faculty of Arts in conducting and choral disciplines, in particular in the discipline of «Choral Arrangement». Methods. The study used a set of methods: analysis, synthesis, generalization, classification, comparative, prognostic, which highlighted the problems of diagnosing the success of students of arts faculties in conducting and choral disciplines (including choral arrangement), means and forms of its implementation. Results. Diagnostics is an integral part of the educational process. Thanks to it, the quality of achievement of the set purpose is defined. Without diagnostic, it is impossible to effectively manage the didactic process. The need to consider the problems of organization, structure and content of diagnostics is due to the radical changes taking place in the national higher school: introduction into practice of state standards and credit-modular system of organization of educational process. The author defines the concept of «diagnostics» as a system of accurate determination of the results of the didactic process, highlights the main types of control in higher education. The study analyzes the main forms, methods and pedagogical conditions for the quality of the diagnosis of academic success of students of the Art Faculty in conducting and choral disciplines, especially in «Choral Arrangement». Conclusions. The author describes the methods of control as ways by which the effectiveness of educational and cognitive students` activities and teachers` pedagogical work is determined. The study identifies the place of educational creative discipline «Choral Arrangement» in the system of training a professional music teacher of the school, who has practical skills in translating choral, solo, folk works for different choirs, is familiar with the basic theoretical principles, has principles and means of translating musical works for choirs. a certain composition and level of performance.

A Model to Evaluate Heat Transfer to a Particle From Thermal Plasma

2001 ◽  
Author(s):  
Sameer D. Samudra ◽  
Milind A. Jog
Keyword(s):  
Heat Transfer ◽  
Spherical Particle ◽  
Thermal Plasma ◽  
Manufacturing Systems ◽  
Accurate Determination ◽  
Ionized Gas ◽  
Ceramic Particles

Abstract In many plasma-aided manufacturing systems, metallic or ceramic particles are introduced in a thermal plasma. The heat transfer from the plasma to the particle, in part, governs the quality of the products. To design thermal plasma-aided manufacturing systems and to predict their performance, accurate determination of particle heat transfer is necessary. In this paper, a spherical particle introduced in an ionized gas made up of electrons, ions, and neutrals is considered. A model to accurately determine heat transfer to the particle is developed.

Studies on the Determination of Cutting Regime Optimal Parameters for Drilling Operation – Comparative Analysis between the Results Obtained by Using Analytical Method and Automated Method of Calculation

2015 ◽  
Vol 809-810 ◽  
pp. 117-122
Author(s):  
Ion Nae ◽  
Gabriela Cristina Ionescu ◽  
Octavian Narcis Ionescu
Keyword(s):  
Analytical Method ◽  
Accurate Determination ◽  
Practical Experience ◽  
Production Costs ◽  
Drilling Process ◽  
Method Of Calculation ◽  
Automated Method ◽  
The Right

From practical experience is well known that the establishment of the right values for the cutting regime parameters (without taking into consideration the cutting schematics) is requiring a large volume of work, thorough calculations and accurate input information regarding the process to be conducted. The high competition from the market is generating increased requirements concerning the productivity of processes, quality of the products as well as the production costs. There it is a strong correlation between these issues and the accurate determination of the cutting regime parameters. This article presents the methods of calculation for the cutting regime parameters for drilling process by using analytical method (classical) and automated method (by using specialized software packages) and the analysis of the results obtained with the goal of establishing which of them are providing the best results in the shortest period of time.

Objective Tire Footprint Segmentation Assessment from High-Speed Videos

2019 ◽  
Vol 48 (4) ◽  
pp. 315-328
Author(s):  
Rodrigo Nava ◽  
Duc Fehr ◽  
Frank Petry ◽  
Thomas Tamisier
Keyword(s):  
High Speed ◽  
Accurate Determination ◽  
Ground Truth ◽  
Operating Conditions ◽  
Contact Patch ◽  
The Road ◽  
Quantitative Image ◽  
Processing Techniques

ABSTRACT The tire establishes the contact between the vehicle and the road. It transmits all forces and moments to the road via its contact patch or footprint and vice versa. The visual inspection of this contact patch using modern optical equipment and image processing techniques is essential for evaluating tire performance. Quantitative image-based analysis can be useful for accurate determination of tire footprint under various operating conditions. Very frequently, methods used in tire footprint segmentation cannot be assessed quantitatively due to the lack of a reference contact area to which the different algorithms could be compared. In this work, we present a novel methodology to characterize the dynamic tire footprint and evaluate the quality of its segmentation from various video sequences in the absence of a ground truth.

scholarly journals IMPACT OF THE GYNECOLOGICAL INTERVENTIONS ON THE PATIENTS' QUALITY OF LIFE

2021 ◽  
pp. 70-71
Author(s):  
Ekaterine Isakidi ◽  
Otar Vasadze
Keyword(s):  
Quality Of Life ◽  
Social Relations ◽  
Accurate Determination ◽  
Medical Intervention ◽  
World Health ◽  
Rank Test ◽  
Before And After ◽  
The Impact

Goal:The final goal of the medical intervention is to improve the patient's quality of life.This descriptive study evaluates the impact of the gynecological interventions on the patient's quality of life.As well as it evaluates the quality of life based on objective and subjective criteria, the identification and determination of which is very important for the accurate determination of the patient's quality of life before and after the medical intervention. Methods: The questionnaire developed by the World Health Organization (WHOQOL-BREF) consisting of 26 questions and evaluating 4 dimensions of quality of life: physical health, mental state, social relations and the environment, was used in this study.It should be noted that the questionnaire was translated into Georgian within the frame of this study. The Data Statistics Program was implemented through SPSS 24.The Wilcoxon signed-rank test was used. Results: The study was conducted in 2020 in three medical institutions in 2 stages, before and after the gynecological interventions. 225 patients were interviewed in the first stage and 188 patients in the second stage. 27.1% (61) of the study participants were patients aged 18- 35, 51.6% (116) were aged 35-54, and 21.3% (48) were patients aged 55 and older

scholarly journals INFLUENCE OF CALCULATION ACCURACY OF TRAFFIC SELF-SIMILARITY EXPONENT ON A QUALITY OF SERVICE CHARACTERISTICS

2020 ◽  
Vol 1 (1) ◽  
pp. 88-94
Author(s):  
A.G. Lozhkovskyi ◽  
V.A. Turchyn ◽  
V.S. Andriiaka ◽  
Keyword(s):  
Quality Of Service ◽  
Hurst Exponent ◽  
Accurate Determination ◽  
Similarity Coefficient ◽  
Time Interval ◽  
Self Similarity ◽  
Service Characteristics ◽  
Self Similar

The quality of service (QoS) characteristics in any telecommunication system depend on its scheme, requirements servicing rules and, to the greatest extent, on the type of traffic generated by the system requirements flow. In packet communication networks, a mathematical model of self-similar traffic is used, where the time interval between packets is described by Pareto or Weibull distributions. With an increase in the degree of self-similarity of packet traffic, the QoS characteristics in the system significantly deteriorate compared to servicing, for example, Poisson traffic. But for such traffic there is no reliable methodology for calculating the characteristics of the quality of service. The degree of self­similarity of traffic is determined by the Hurst exponent H or the coefficient of self-similarity. The method of increasing the accuracy of calculating the quality of service characteristics in a packet communication network with self-similar traffic due to a more accurate determination of the self-similarity coefficient or Hurst exponent depending on the parameters of the probability function of the distribution of the time interval between packets is analyzed. For self-similar traffic, the accuracy of new formulas for calculating the traffic self-similarity coefficient based on the shape parameter of the probability distribution has been verified. After a more accurate determination of the Hurst exponent, the average value of the number of packets in the system is calculated using the Norros formula, and then, from the approximation of the distribution function of the system states, the probability of waiting for packet service is calculated. With increasing accuracy of calculating the Hurst exponent, the accuracy of calculating the very characteristics of the quality of service also increases. Simulation confirmed the higher accuracy of these methods for calculating QoS characteristics in a system with self-similar traffic. Moreover, the differences in simulation and calculation results do not exceed 3 ... 5%.

A quantitative approach to inner shell losses

1978 ◽  
Vol 36 (1) ◽  
pp. 526-527 ◽  
Author(s):  
R.D. Leapman ◽  
P. Rez ◽  
D.F. Mayers
Keyword(s):  
Energy Transfer ◽  
Cross Section ◽  
Cross Sections ◽  
Accurate Determination ◽  
Background Intensity ◽  
Core Excitation ◽  
Quantitative Basis ◽  
Cross Section Differential ◽  
Bound Electrons

Microanalysis by EELS has been developing rapidly and though the general form of the spectrum is now understood there is a need to put the technique on a more quantitative basis (1,2). Certain aspects important for microanalysis include: (i) accurate determination of the partial cross sections, σx(α,ΔE) for core excitation when scattering lies inside collection angle a and energy range ΔE above the edge, (ii) behavior of the background intensity due to excitation of less strongly bound electrons, necessary for extrapolation beneath the signal of interest, (iii) departures from the simple hydrogenic K-edge seen in L and M losses, effecting σx and complicating microanalysis. Such problems might be approached empirically but here we describe how computation can elucidate the spectrum shape.The inelastic cross section differential with respect to energy transfer E and momentum transfer q for electrons of energy E0 and velocity v can be written as

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