Simulations found within-subject measurement variation in glycaemic measures may cause overdiagnosis of prediabetes and diabetes

2021 ◽  
Author(s):  
Sam White ◽  
Houchen Gong ◽  
Lin Zhu ◽  
Jenny Doust ◽  
Tze Ping Loh ◽  
...  
Keyword(s):  
Measurement Variation

scholarly journals Design and characteristic analysis of vibration feeding system for coal-gas dust-removal medium

Clean Energy ◽  
2020 ◽  
Author(s):  
Bing Liu ◽  
Lixin He ◽  
Xianglong Zhao ◽  
Qiang Qin ◽  
Yi Guo
Keyword(s):  
Control Unit ◽  
Dust Removal ◽  
Feeding System ◽  
Characteristic Analysis ◽  
Coal Gas ◽  
Measurement Variation ◽  
Gasification Process ◽  
Valve Opening ◽  
Design Requirements ◽  
Design Factors

Abstract A vibration feeder is a piece of equipment for rationing and conveying powder, particle and block materials. In order to test the regeneration performance of de-dusting medium for high-temperature coal gas, a set of de-dusting medium-feeding systems was designed quantitatively. The de-dusting medium-feeding system is used in the gasification process for cleaning coal gas. The system is mainly composed of a hopper unit, control unit and feeding unit. In order to optimize the feeding stability of the coal-gas dust-removal medium vibration feeding system, the setting and scope of the following design factors and operating factors are investigated. Specifically, it includes the influence of gate-valve-opening adjustment of the control unit on the feeding stability of a vibrating feeding system; the influence of the gap size of the dipleg of the control unit on the feeding sensitivity of the vibration system; the influence of the particle size of the de-dusting medium on the operating range of the vibrating feeding system; the influence of the digitization of the working-current indicator of electromagnetic vibrating feeders on measurement variation and the process variation of a vibration feeding system. This vibration feeding system can realize the function of precise and quantitative feeding of the de-dusting medium, which can meet the design requirements of subsequent experimental research.

scholarly journals P13.04: Measurement variation of amniotic fluid pocket in monochorionic diamniotic twin gestations suspected of twin-to-twin transfusion syndrome

2013 ◽  
Vol 42 (s1) ◽  
pp. 159-160
Author(s):  
A. Mabuchi ◽  
K. Ishii ◽  
R. Yamamoto ◽  
T. Taguchi ◽  
H. Kawaguchi ◽  
...  
Keyword(s):  
Amniotic Fluid ◽  
Measurement Variation

scholarly journals The validity of the online thought-probing procedure of mind wandering is not threatened by variations of probe rate and probe framing

2018 ◽  
Author(s):  
Anna-Lena Schubert ◽  
Gidon T. Frischkorn ◽  
Jan Rummel
Keyword(s):  
Working Memory Capacity ◽  
Mind Wandering ◽  
Time Variability ◽  
Ongoing Task ◽  
Reaction Time Variability ◽  
Measurement Variation ◽  
Study Results ◽  
Great Heterogeneity ◽  
Response Task ◽  
Thought Probes

Recently, there has been a surge of interest in the measurement of mind-wandering during ongoing tasks. The frequently used online thought-probing procedure (OTPP), in which individuals are probed on whether their thoughts are on-task or not while performing an ongoing task, has repeatedly been criticized, because variations in the frequency of thought probes and the order in which on-task and off-task thoughts are referred to have been shown to affect mind-wandering rates. Hitherto, it is unclear whether this susceptibility to measurement variation only affects mean response rates in probe-caught mind-wandering or poses an actual threat to the validity of the OTPP, endangering the replicability and generalizability of study results. Here we show in a sample of 177 students that variations of the frequency or framing of thought probes do not affect the validity of the OTPP. While we found that more frequent thought probing reduced the rate of probe-caught mind-wandering, we did not replicate the effect that mind-wandering is more likely to be reported when off-task thoughts are referred to first rather than second. Crucially, associations between probe-caught mind-wandering and task performance, as well as associations between probe-caught mind-wandering and covariates (trait mind-wandering, reaction-time variability in the metronome-response task, working-memory capacity) did not change with variations of the probing procedure. Therefore, it seems unlikely that the great heterogeneity in the way the OTPP is implemented across different studies endangers the replicability and generalizability of study results. Data and analysis code are available at https://osf.io/7w8bm/.

scholarly journals New Method for the On-Line Determination of Molybdenum Via New Microphotometric Home Mode Instrument, Using Hight Emitting Diode as a Variable Intensity Radiant Source with a Miniture Photosilicone Diode Detector for System: Molybdenum(VI)-Hydrogen Peroxide-Ammonium Solution

2007 ◽  
Vol 4 (4) ◽  
pp. 571-582
Author(s):  
Baghdad Science Journal
Keyword(s):  
Hydrogen Peroxide ◽  
Classical Method ◽  
Wave Length ◽  
Research Work ◽  
Standard Addition ◽  
Ammonia Solution ◽  
Variable Intensity ◽  
Measurement Variation ◽  
On Line

This research work aims to the determination of molybdenum (VI) ion via the formation of peroxy molybdenum compounds which has red-brown colour with absorbance wave length at 455nm for the system of ammonia solution-hydrogen peroxide-molybdenum (VI) using a completely newly developed microphotometer based on the ON-Line measurement. Variation of responses expressed in millivolt. A correlation coefficient of 0.9925 for the range of 2.5-150 ?g.ml-1 with percentage linearity of 98.50%. A detection limit of 0.25 ?g.ml-1 was obtained. All physical and chemical variable were optimized interferences of cation and anion were studied classical method of measurement were done and compared well with newly on-line measurements. Application for the use of developed method on alloy samples, using standard addition method and agreed quite wall.

scholarly journals Use of 2D and multislice transperineal ultrasonography to describe the degree of perineal laceration following vaginal delivery

2018 ◽  
Vol 27 (2) ◽  
Author(s):  
Budi I. Santoso ◽  
Suskhan Djusad ◽  
Surahman Hakim ◽  
Fernandi Moegni ◽  
Alfa P. Meutia ◽  
...  
Keyword(s):  
Vaginal Delivery ◽  
Clinical Examination ◽  
Evaluation Method ◽  
Cross Sectional Study ◽  
Perineal Laceration ◽  
Perineal Tear ◽  
Cross Sectional ◽  
Measurement Variation ◽  
The Mean ◽  
Primiparous Women

Background: Perineal tear is the most common complication after vaginal delivery. Pill-rolling test is a widely used clinical evaluation method to determine the degree of perineal tear. However, the evaluation results of anal sphincter complex (ASC) differ between clinical examination and 2D/multislice transperineal ultrasonography (TPUS). This study aims to describe measurement variation between these modalities.Methods: This cross-sectional study was conducted at Cipto Mangunkusumo Hospital from November 2015 to May 2016. Subjects were primiparous women after vaginal delivery. Clinical examination using pill-rolling test was performed to determine the degree of perineal laceration. Suture was conducted accordingly. The subjects were subjected to 2D/multislice TPUS 72 hours after delivery to evaluate the integrity of internal and external anal sphincters. Data were collected and analyzed to determine compatibility between these examinations.Results: Among 70 prospective primiparous women, five were excluded due to unavailability to undergo 2D/multislice TPUS 72 hours after delivery. The mean duration to perform 2D/multislice TPUS was 4.5 minutes, and pain was tolerable during the examination. The compatibility values of clinical examination with 2D and multislice TPUS were 0.98 and 0.93, respectively, with Cohen’s kappa of 0.92 (95% CI 0.81–1.00) and 0.79 (95% CI 0.58–0.99), respectively.Conclusion: Clinical examination is compatible with 2D/multislice TPUS for determining the degree of perineal tear after vaginal delivery.

scholarly journals Compressive Sensing Based Radio Tomographic Imaging with Spatial Diversity

Sensors ◽  
2019 ◽  
Vol 19 (3) ◽  
pp. 439 ◽  
Author(s):  
Shengxin Xu ◽  
Heng Liu ◽  
Fei Gao ◽  
Zhenghuan Wang
Keyword(s):  
Multipath Fading ◽  
Spatial Diversity ◽  
Tomographic Imaging ◽  
Link Quality ◽  
Small Scale ◽  
Reconstruction Method ◽  
Indoor Environments ◽  
Localization Accuracy ◽  
Measurement Variation ◽  
Radio Tomographic Imaging

Radio tomographic imaging (RTI) has emerged as a promising device-free localization technology for locating the targets with no devices attached. RTI deduces the location information from the reconstructed attenuation image characterizing target-induced spatial loss of radio frequency measurements in the sensing area. In cluttered indoor environments, RF measurements of wireless links are corrupted by multipath effects and thus less robust to achieve a high localization accuracy for RTI. This paper proposes to improve the quality of measurements by using spatial diversity. The key insight is that, with multiple antennae equipped, due to small-scale multipath fading, RF measurement variation of each antenna pair behaves differently. Therefore, spatial diversity can provide more reliable and strong measurements in terms of link quality. Moreover, to estimate the location from the image more precisely and make the image more identifiable, we propose using a new reconstruction regularization linearly combining the sparsity and correlation inherent in the image. The proposed reconstruction method can remarkably reduce the image noise and enhance the imaging accuracy especially in the case of a few available measurements. Indoor experimental results demonstrate that compared to existing RTI improvement methods, our RTI solution can reduce the root-mean-square localization error at least 47% while also improving the imaging performance.

Range of Normal and Abnormal Syndesmotic Measurements Using Weightbearing CT

2019 ◽  
Vol 40 (12) ◽  
pp. 1430-1437 ◽  
Author(s):  
Noortje Catharina Hagemeijer ◽  
Song Ho Chang ◽  
Mohamed Elghazy Abdelaziz ◽  
Jack Christopher Casey ◽  
Gregory Richard Waryasz ◽  
...  
Keyword(s):  
Internal Control ◽  
Early Recognition ◽  
Interobserver Reliability ◽  
Ankle Injury ◽  
P Value ◽  
Diagnostic Study ◽  
Level Of Evidence ◽  
Measurement Variation ◽  
Tibiofibular Joint ◽  
Weightbearing Ct

Background: Early recognition of syndesmotic instability is critical for optimizing clinical outcome. Injuries causing a more subtle instability, however, can be difficult to diagnose. The purpose of this study was to evaluate both distal tibiofibular articulations using weightbearing computed tomography (CT) in patients with known syndesmotic instability, thereafter comparing findings between the injured and uninjured sides. We also aimed to define the range of normal measurement variation among patients without syndesmotic injury. Methods: Patients with unilateral syndesmotic instability requiring operative fixation ( n = 12) underwent preoperative bilateral ankle weightbearing CT. A separate cohort of patients without ankle injury who also underwent bilateral ankle weightbearing CT were included as comparative controls ( n = 24). For each weightbearing CT, a series of 7 axial plane tibiofibular joint measurements, including 1 angular measurement, were utilized to evaluate parameters of the syndesmotic anatomy at a level 1 cm above the tibial plafond. Values were recorded by 2 independent observers to assess for interobserver reliability. Results: Among those with unilateral syndesmotic instability, values differed between the injured and uninjured sides in 4 of the 7 measurements performed including the syndesmotic area: direct anterior, middle, and posterior differences, and sagittal translation ( P < .001, < .001, < .001, and < .001, respectively). In the control population without ankle injury, no differences were identified between any of the bilateral measurements ( P value range, .172-.961). Conclusion: This study highlights the ability of weightbearing CT to effectively differentiate syndesmotic diastasis among patients with surgically confirmed syndesmotic instability from those without syndesmotic instability. It underscores the substantial utility and importance of using the contralateral, uninjured side as a valid internal control whenever the need for confirming potential syndesmotic instability arises. Prospective studies are necessary to fully understand the accuracy of weightbearing CT in diagnosing occult syndesmotic instability among patients for whom the diagnosis remains in question. Level of Evidence: Level III, comparative diagnostic study.

Sign in / Sign up

Export Citation Format

Share Document