scholarly journals The Application of a Two-Sample Dispersion Method for the Analysis of Electrochemical Noises

2020 ◽  
Vol 20 (4) ◽  
pp. 214-218
Author(s):  
Mikhail A. Abaturov ◽  
Keyword(s):  
Statistical Estimation ◽  
Noise Signal ◽  
Methodological Issues ◽  
Dispersion Method ◽  
Quality Of Results ◽  
Electrochemical Systems ◽  
Noise Measurements ◽  
Stationary Conditions ◽  
Sample Dispersion

The methodological issues of noise research in electrochemical systems are considered. The problem of reducing the spread of statistical estimation of the noise signal is solved. The study was conducted using specific stationary noises of a lithium battery. The analysis was performed using the two-sample dispersion method. It is shown that if the stationary conditions are met, noise measurements of electrochemical systems can provide the quality of results of high precision.

Resistance Monitor and Control for Vacuum Evaporation of Metals and Carbon

1976 ◽  
Vol 34 ◽  
pp. 572-573
Author(s):  
Russell L. Steere ◽  
Eric F. Erbe ◽  
J. Michael Moseley
Keyword(s):  
Electronic Device ◽  
Point Sources ◽  
High Contrast ◽  
Variable Resistor ◽  
Quality Of Results ◽  
Low Contrast ◽  
Evaporation Source ◽  
And Control ◽  
At Will

We have designed and built an electronic device which compares the resistance of a defined area of vacuum evaporated material with a variable resistor. When the two resistances are matched, the device automatically disconnects the primary side of the substrate transformer and stops further evaporation.This approach to controlled evaporation in conjunction with the modified guns and evaporation source permits reliably reproducible multiple Pt shadow films from a single Pt wrapped carbon point source. The reproducibility from consecutive C point sources is also reliable. Furthermore, the device we have developed permits us to select a predetermined resistance so that low contrast high-resolution shadows, heavy high contrast shadows, or any grade in between can be selected at will. The reproducibility and quality of results are demonstrated in Figures 1-4 which represent evaporations at various settings of the variable resistor.

scholarly journals Monitoring and Debugging the Quality of Results in Approximate Programs

2015 ◽  
Vol 43 (1) ◽  
pp. 399-411 ◽  
Author(s):  
Michael Ringenburg ◽  
Adrian Sampson ◽  
Isaac Ackerman ◽  
Luis Ceze ◽  
Dan Grossman
Keyword(s):  
Quality Of Results

scholarly journals Concordance between systematic reviews of randomized controlled trials in assisted reproduction: an overview

2020 ◽  
Vol 2020 (4) ◽  
Author(s):  
Mariano Mascarenhas ◽  
Theodoros Kalampokas ◽  
Sesh Kamal Sunkara ◽  
Mohan S Kamath
Keyword(s):  
Assisted Reproduction ◽  
Systematic Reviews ◽  
Selective Reporting ◽  
Methodological Issues ◽  
Quality Of Evidence ◽  
Randomized Controlled ◽  
Cochrane Reviews ◽  
Secondary Outcomes ◽  
Meta Analyses

Abstract STUDY QUESTION Are systematic reviews published within a 3-year period on interventions in ART concordant in their conclusions? SUMMARY ANSWER The majority of the systematic reviews published within a 3-year period in the field of assisted reproduction on the same topic had discordant conclusions. WHAT IS KNOWN ALREADY Systematic reviews and meta-analyses have now replaced individual randomized controlled trials (RCTs) at the top of the evidence pyramid. There has been a proliferation of systematic reviews and meta-analyses, many of which suffer from methodological issues and provide varying conclusions. STUDY DESIGN, SIZE, DURATION We assessed nine interventions in women undergoing ART with at least three systematic reviews each, published from January 2015 to December 2017. PARTICIPANTS/MATERIALS, SETTING, METHODS The systematic reviews which included RCTs were considered eligible for inclusion. The primary outcome was extent of concordance between systematic reviews on the same topic. Secondary outcomes included assessment of quality of systematic reviews, differences in included studies in meta-analyses covering the same search period, selective reporting and reporting the quality of evidence. MAIN RESULTS AND THE ROLE OF CHANCE Concordant results and conclusions were found in only one topic, with reviews in the remaining eight topics displaying partial discordance. The AMSTAR grading for the majority of the non-Cochrane reviews was critically low whilst it was categorized as high for all of the Cochrane reviews. For three of the nine topics, none of the included systematic reviews assessed the quality of evidence. We were unable to assess selective reporting as most of the reviews did not have a pre-specified published protocol. LIMITATIONS, REASONS FOR CAUTION We were limited by the high proportion of reviews lacking a pre-specified protocol, which made it impossible to assess for selective reporting. Furthermore, many reviews did not specify primary and secondary outcomes which made it difficult to assess reporting bias. All the authors of this review were Cochrane review authors which may introduce some assessment bias. The categorization of the review’s conclusions as beneficial, harmful or neutral was subjective, depending on the tone and wording of the conclusion section of the review. WIDER IMPLICATIONS OF THE FINDINGS The majority of the systematic reviews published within a 3-year period on the same topic in the field of assisted reproduction revealed discordant conclusions and suffered from serious methodological issues, hindering the process of informed healthcare decision-making. STUDY FUNDING/COMPETING INTEREST(S) All the authors are Cochrane authors. M.S.K. is an editorial board member of Cochrane Gynaecology and Fertility group. No grant from funding agencies in the public, commercial or not-for-profit sectors was obtained.

Quality of Service on Grid: architectural and methodological issues

2010 ◽  
Vol 23 (8) ◽  
pp. 745-766 ◽  
Author(s):  
A. Merlo ◽  
A. Clematis ◽  
A. Corana ◽  
V. Gianuzzi
Keyword(s):  
Quality Of Service ◽  
Methodological Issues

Effects of Railway Noise on Residents’ in A Residential Area

2021 ◽  
Vol 3 (01) ◽  
pp. 17-28
Author(s):  
Ria Anggreani Syahputri ◽  
Budi Damianto
Keyword(s):  
Noise Level ◽  
Sleep Disturbances ◽  
Sampling Technique ◽  
Residential Area ◽  
Comfort Level ◽  
Simple Method ◽  
Urban Village ◽  
Noise Measurements ◽  
Influence Of Noise

Population growth in Depok City is large and not in accordance with development land causes many residents’ to build houses with conditions <5 meters from the line of Electric Rail Train or Kereta Rel Listrik (KRL); this causes changes in the quality of the environment, including noise. The objective of this study is to determine the noise level, and the results will be compared with the standard noise level of the residential area; also, to find the influence of noise on residents’. This research was conducted in the area of ​​Rawa Geni Raya Street, 1st Neighborhood, Ratu Jaya Urban Village, Depok City. Noise measurements were carried out at 5-points using a simple method with a noise level measuring instrument (SLM). At one time, the measurement was taken for 10 minutes with a reading time of every 5 seconds. The questionnaire was measured using a Purposive Random Sampling technique, and the number of samples was calculated using the Slovin formula. The results of this study indicate that the 5-point noise level exceeds the recommended threshold according to KEPMEN LH 48 of 1996 and PERMENKES 718/1987 at  55 dB(A). The largest value for the 24-hour noise level (LSM) is at point 1, which is 5 m from the KRL line. The noise level on the weekday is 75.32 dB(A) and 74.24 dB(A) on weekends. According to PERMENKES No 718/1987, the location of point 1 should be included in Area D as an industrial zone, plant, railway station, and bus terminal. The results of questionnaires by 34 respondents showed that the noise generated by KRL was noisy and the majority of respondents agreed the noise affected the comfort level; in terms of health, respondents agreed KRL noise caused sleep disturbances and hearing loss.

scholarly journals Problems of Household Budget Surveys: Regional Experience

2019 ◽  
Vol 26 (10) ◽  
pp. 37-45
Author(s):  
R. P. Aichepsheva
Keyword(s):  
Sample Survey ◽  
Information Load ◽  
Methodological Issues ◽  
Organizational Challenges ◽  
Level Of Automation ◽  
Household Budget ◽  
Household Budget Surveys

The article addresses organizational challenges and methodological issues that state statistical bodies face while preparing for and conducting household budget sample survey (HBS). Among these problems, the author considers the difficulties associated with ensuring the quality of HBS results and minimizing the number of respondent refusals to participate in this observation.According to the author, the range of tasks to be solved includes, among other things, methodological and organizational aspects, such as the need to review certain regulations of the HBS by-laws, search for reserves to reduce the survey program, to change the order of generating sample units, and a number of other provisions. In this regard, the author proposes to decrease the information load on respondents. It includes reducing the time of filling out the questionnaire, as well as applying an updated approach to the formation of the respondent network. In addition, the author emphasizes the need to increase the level of automation of collecting and processing of primary HBS data.

scholarly journals Verification tests of frictional heat modelling results

Mechanika ◽  
2020 ◽  
Vol 26 (3) ◽  
pp. 260-264
Author(s):  
Andrzej BORAWSKI ◽  
Dariusz SZPICA ◽  
Grzegorz MIECZKOWSKI
Keyword(s):  
Friction Surface ◽  
Main Parameter ◽  
Real Life ◽  
Computer Models ◽  
Frictional Heat ◽  
Quality Of Results ◽  
Pin On Disc ◽  
Life Phenomena

Simulation tests have currently become very popular. It gives access to values and parameters which are difficult or impossible to obtain in real conditions. However, in many cases the accuracy of the results may raise concerns, as not every researcher conducts verification tests. This article looks into the quality of results obtained in virtual tests. The tests were conducted using a pin-on-disc station. The main parameter of the verification study was the temperature of the pin measured along its axis at 1mm from the friction surface. This shows that computer models produce results which accurately reflect real-life phenomena.

scholarly journals Molecular studies of exercise, skeletal muscle, and ageing

F1000Research ◽  
2016 ◽  
Vol 5 ◽  
pp. 1087 ◽  
Author(s):  
James A. Timmons ◽  
Iain J. Gallagher
Keyword(s):  
Skeletal Muscle ◽  
Research Capacity ◽  
Short Review ◽  
Neuromuscular Function ◽  
Potential Mechanism ◽  
Muscle Exercise ◽  
Methodological Issues ◽  
Physiological Capacity ◽  
New Concepts

The purpose of an F1000 review is to reflect on the bigger picture, exploring controversies and new concepts as well as providing opinion as to what is limiting progress in a particular field. We reviewed about 200 titles published in 2015 that included reference to ‘skeletal muscle, exercise, and ageing’ with the aim of identifying key articles that help progress our understanding or research capacity while identifying methodological issues which represent, in our opinion, major barriers to progress. Loss of neuromuscular function with chronological age impacts on both health and quality of life. We prioritised articles that studied human skeletal muscle within the context of age or exercise and identified new molecular observations that may explain how muscle responds to exercise or age. An important aspect of this short review is perspective: providing a view on the likely ‘size effect’ of a potential mechanism on physiological capacity or ageing.

scholarly journals Publication Trends on Mitophagy in the World and China: A 16-Year Bibliometric Analysis

2021 ◽  
Vol 9 ◽  
Author(s):  
Jingli Chen ◽  
Xin Li ◽  
Yifan Jia ◽  
Zhongyuan Xia ◽  
Jishi Ye
Keyword(s):  
Bibliometric Analysis ◽  
Cell Biology ◽  
Developed Countries ◽  
The United States ◽  
Research Progress ◽  
Publication Trends ◽  
Quality Of Results ◽  
The Past ◽  
The World

In the past 16 years, research on mitophagy has increasingly expanded to a wider range of subjects. Therefore, comprehensively analyzing the relevant progress and development trends on mitophagy research requires specific methods. To assess the hotspots, directions, and quality of results in this field worldwide, we used multiple tools to examine research progress and growing trends in research on the matter during the last 16 years (from 2005 to 2020). We also compared the quantity and quality of the literature records on mitophagy published by research institutions in China and other developed countries, reviewed China’s contribution, and examined the gap between China and these developed countries. According to the results of our bibliometric analysis, the United States and its research institutes published the most papers. We identified cell biology as the most commonly researched subject on mitophagy and AUTOPHAGY as the most popular journal for research on mitophagy. We also listed the most cited documents from around the world and China. With gradually increased funding, China is progressively becoming prominent in the field of mitophagy; nevertheless, the gap between her and major countries in the world must be closed.

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