The Fehleranalyse Error Analysis of Fully Characteristic Curve of Pump to Be Nominalization and Study for the Influence on Result of Hydraulic Transients Calculation

2011 ◽  
Vol 250-253 ◽  
pp. 3696-3701
Author(s):  
Yu Si Yang ◽  
Ru Dong ◽  
Jie Gao
Keyword(s):  
Error Analysis ◽  
Calculation Method ◽  
Similarity Theory ◽  
Characteristic Curve ◽  
Water Hammer ◽  
Engineering Project ◽  
Real Situation ◽  
Numeric Calculation ◽  
Specific Speed ◽  
The Difference

In this paper，by transforming the fully characteristic curve of pump with eighty specific speed to be numeralization he obtained fehleranalyse error of discrete data were analyzed based on the pump similarity theory and the difference between certain assumed condition and real situation in numeralization process. Then the influence of the fehleranalyse error of numeralization method on the pressure boost caused by Pump-off water hammer was computed by a Pump-off water hammer calculation within an real engineering project. The reliability of numeric calculation method of fully characteristic curve of Pump is proved.

scholarly journals Relationship between Serum Alkaline Phosphatase and Low Muscle Mass Index Among Korean Adults: A Nationwide Population-Based Study

Biomolecules ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 842
Author(s):  
Jun-Hyuk Lee ◽  
A-Ra Cho ◽  
Yong-Jae Lee
Keyword(s):  
Skeletal Muscle ◽  
Alkaline Phosphatase ◽  
Muscle Mass ◽  
Skeletal Muscle Mass ◽  
Serum Alkaline Phosphatase ◽  
Inflammatory Marker ◽  
Characteristic Curve ◽  
Population Based ◽  
Nutrition Survey ◽  
The Difference

Sarcopenia has attracted interest due to its impact on various health problems. Chronic inflammation is an important contributor to sarcopenia. Thus, we aimed to investigate the association between serum alkaline phosphatase (ALP), which is a novel inflammatory marker, and muscle mass. This study included 15,579 adults from the 2008–2011 Korea National Health and Nutrition Survey. Low skeletal muscle mass index (LSMI) was defined as body mass index-adjusted appendicular skeletal muscle mass less than 0.789 for men and 0.512 for women. Multiple logistic regression revealed that the highest ALP tertile was significantly associated with LSMI compared with the lowest ALP tertile in both men [Odds ratio (OR): 1.41; 95% confidence interval (CI): 1.04–1.91] and women (OR: 1.45; 95% CI: 1.00–2.10) after adjusting for other confounders. On the receiver operating characteristic curve analysis, the predictive power was significantly higher for ALP levels than for white blood cell count in women (p < 0.001), whereas the difference was not significant in men (p = 0.515). Our findings suggest the potential use of serum ALP as an inflammatory marker and a predictor of sarcopenia.

scholarly journals 0588 Ring Pulse Oximeter for Screening of Moderate to Severe OSA: A Pilot Study

SLEEP ◽  
2020 ◽  
Vol 43 (Supplement_1) ◽  
pp. A225-A225
Author(s):  
J Xue ◽  
R Zhao ◽  
J Li ◽  
L Zhao ◽  
B Zhou ◽  
...  
Keyword(s):  
Pilot Study ◽  
Pulse Oximeter ◽  
Characteristic Curve ◽  
Diagnostic Value ◽  
Receiver Operator Characteristic Curve ◽  
Oxygen Desaturation ◽  
Significant Difference ◽  
Acceptance Range ◽  
The Difference ◽  
Two Parameters

Abstract Introduction To evaluate the utility of the ring pulse oximeter for screening of OSA in adults. Methods 87 adults were monitored by a ring pulse oximeter and PSG simultaneously during a nocturnal in-lab sleep testing. 3% oxygen desaturation index (ODI3); Mean oxygen saturation(MSpO2), Saturation impair time below 90% (SIT90) derived from an automated algorithm of the ring pulse oximeter. Meanwhile, the parameters of PSG were scored manually according to the AASM Manual. Correlation and receiver operator characteristic curve analysis were used to measure the accuracy of ring pulse oximeter and its diagnostic value for moderate to severe OSA (AHI≥15). Results Among the 87 participants, 18 cases were AHI&lt;5, 17 cases were diagnosed with mild OSA (AHI:5-14.9), 25 cases were diagnosed with moderate OSA (AHI:15-29.9) and 27 cases were diagnosed with severe OSA (AHI≥30). There was no significant difference between PSG and ring pulse oximeter in regard to ODI3 (23.4±23.5 vs 24.7 ± 21.7), and SIT90 (1.54%, range 0.14%-8.99% vs. 3.20%, range 0.60%, 12.30%) (P&gt;0.05], Further analysis indicated that two parameters from the oximeter correlated well with that derived from PSG (r=0.889, 0.567, respectively, both p&lt;0.05). Although MSpO2 correlated significantly (r=0.448, P&lt;0.05), the difference was remarkable [95.9%, range 94.0% to 97.0% vs. 94.5%, range 93.3% to 95.7%, p&lt;0.05]. Bland-Altman plots showed that the agreement of these three parameters was within the clinical acceptance range. The ROC curve showed that the sensitivity and specificity of the ring pulse oximeter when the oximeter derived ODI3 ≥12.5 in the diagnosis of moderate to severe OSA were 82.7% and 74.3%, respectively. Conclusion The pilot study indicated that ring pulse oximeter can detect oxygen desaturation events accurately, therefore to be used as a screening tool for moderate to severe OSA. Support The study was supported by the National Natural Science Foundation of China (No. 81420108002 and NO. 81570083).

scholarly journals A Robust Rerank Approach for Feature Selection and Its Application to Pooling-Based GWA Studies

2013 ◽  
Vol 2013 ◽  
pp. 1-11 ◽  
Author(s):  
Jia-Rou Liu ◽  
Po-Hsiu Kuo ◽  
Hung Hung
Keyword(s):  
Characteristic Curve ◽  
Real Data ◽  
Tuning Parameter ◽  
Practical Implementation ◽  
Tuning Parameters ◽  
Genome Wide ◽  
Feature Based ◽  
The Difference ◽  
Gwa Studies ◽  
Selection Of

Large-p-small-ndatasets are commonly encountered in modern biomedical studies. To detect the difference between two groups, conventional methods would fail to apply due to the instability in estimating variances int-test and a high proportion of tied values in AUC (area under the receiver operating characteristic curve) estimates. The significance analysis of microarrays (SAM) may also not be satisfactory, since its performance is sensitive to the tuning parameter, and its selection is not straightforward. In this work, we propose a robust rerank approach to overcome the above-mentioned diffculties. In particular, we obtain a rank-based statistic for each feature based on the concept of “rank-over-variable.” Techniques of “random subset” and “rerank” are then iteratively applied to rank features, and the leading features will be selected for further studies. The proposed re-rank approach is especially applicable for large-p-small-ndatasets. Moreover, it is insensitive to the selection of tuning parameters, which is an appealing property for practical implementation. Simulation studies and real data analysis of pooling-based genome wide association (GWA) studies demonstrate the usefulness of our method.

scholarly journals Newman’s Error Analysis Dalam Geometri Ruang Ditinjau dari Kecerdasan Visual Siswa SMA

2019 ◽  
Vol 3 (2) ◽  
pp. 447-461
Author(s):  
Ardina Fahriyanti Maharani ◽  
Erlina Prihatnani
Keyword(s):  
High School ◽  
Error Analysis ◽  
Transformation Process ◽  
Intelligence Test ◽  
Solid Geometry ◽  
Visual Intelligence ◽  
The Difference ◽  
Point Distance ◽  
Different Levels ◽  
Geometry Test

In solid geometry needed the ability to visualize space that cannot be seen so differences in visual intelligence can trigger errors in solving geometry problems. Therefore, this study aimed to determine the types of errors made by students and the factors that cause errors in working on geometry problems based on Newman's Error Analysis (NEA) in terms of visual intelligence. This research chose the subjects of class XII high school who had studied the material distance points to lines in space with different levels of visual intelligence, namely high and low. The process of collecting data used visual intelligence test questions, geometry test questions, and interviews. The results of this study indicated that the level of students' visual intelligence affects the difference in location and the factor that causes errors in the stage of transformation especially on determining the distance in dimension 3. Students with high visual intelligence made mistakes at the stage of transformation and encoding that caused by the students’ carelessness. However, students with low visual intelligence made mistakes at the stage of comprehension, transformation, process skills, and encoding due to the concept of the point distance to the line and the concept of the Pythagorean theorem.

scholarly journals Effectiveness of Body Roundness Index (BRI) and a Body Shape Index (ABSI) in Predicting Hypertension: A Systematic Review and Meta-Analysis of Observational Studies

2021 ◽  
Vol 18 (21) ◽  
pp. 11607
Author(s):  
Julián F. Calderón-García ◽  
Raúl Roncero-Martín ◽  
Sergio Rico-Martín ◽  
Jorge M. De Nicolás-Jiménez ◽  
Fidel López-Espuela ◽  
...  
Keyword(s):  
Body Shape ◽  
Meta Analysis ◽  
Characteristic Curve ◽  
Shape Index ◽  
Diagnostic Odds Ratio ◽  
The Body ◽  
Adult Women ◽  
Summary Receiver Operating Characteristic ◽  
The Difference ◽  
A Body Shape Index

Introduction: The body roundness index (BRI) and a body shape index (ABSI) are novel anthropometric indices established to determine both the amount visceral adipose tissue and body fat. Objective: to investigate whether BRI and ABSI are better predictors of hypertension than body mass index (BMI), waist circumference (WC) or waist-to-height ratio (WHtR). Methods: A systematic search was conducted in the Scopus, PubMed and Web of Science databases up until 31 December 2020. Results: The estimated pooled area under curve [AUC (95% CI)] for BRI [0.67 (0.65–0.70)] for the prediction of hypertension were superior to that of ABSI (0.58 (0.56–0.60)), similar to that of BMI [0.67 (0.64–0.69)], and lower than those WC [0.68 (0.66–0.70)] and WHtR [0.68 (0.66–0.71)]. Nevertheless, the difference of BRI compared to WC and WHtR in the context of predicting hypertension was non-significant. ABSI was significantly lower (p < 0.05) than BRI, BMI, WC and WHtR. Similar findings were observed with the summary receiver operating characteristic curve (AUC-SROC). There were no significant differences between subgroups according to type of population or diagnostic criteria of hypertension. The diagnostic odds ratio (dORs) proved that increased BRI and ABSI were related with an elevated hypertension risk. Conclusions: BRI and ABSI have discriminatory power for hypertension in adult women and men from different populations. Although, WHtR and WC provided the best performance when assessing hypertension, no significant differences were found for BRI. Finally, BRI was significantly better predictor of hypertension than ABSI.

scholarly journals Bias and error in modelling thermochronometric data: resolving a potential increase in Plio-Pleistocene erosion rate

2021 ◽  
Vol 9 (5) ◽  
pp. 1153-1221
Author(s):  
Sean D. Willett ◽  
Frédéric Herman ◽  
Matthew Fox ◽  
Nadja Stalder ◽  
Todd A. Ehlers ◽  
...  
Keyword(s):  
Error Analysis ◽  
Inverse Method ◽  
Synthetic Data ◽  
Systematic Bias ◽  
Exhumation Rate ◽  
Erosion Rates ◽  
The Difference ◽  
Path Lengths ◽  
Using Data ◽  
Exhumation History

Abstract. Thermochronometry provides one of few methods to quantify rock exhumation rate and history, including potential changes in exhumation rate. Thermochronometric ages can resolve rates, accelerations, and complex histories by exploiting different closure temperatures and path lengths using data distributed in elevation. We investigate how the resolution of an exhumation history is determined by the distribution of ages and their closure temperatures through an error analysis of the exhumation history problem. We define the sources of error, defined in terms of resolution, model error and methodological bias in the inverse method used by Herman et al. (2013) which combines data with different closure temperatures and elevations. The error analysis provides a series of tests addressing the various types of bias, including addressing criticism that there is a tendency of thermochronometric data to produce a false inference of faster erosion rates towards the present day because of a spatial correlation bias. Tests based on synthetic data demonstrate that the inverse method used by Herman et al. (2013) has no methodological or model bias towards increasing erosion rates. We do find significant resolution errors with sparse data, but these errors are not systematic, tending rather to leave inferred erosion rates at or near a Bayesian prior. To explain the difference in conclusions between our analysis and that of other work, we examine other approaches and find that previously published model tests contained an error in the geotherm calculation, resulting in an incorrect age prediction. Our reanalysis and interpretation show that the original results of Herman et al. (2013) are correctly calculated and presented, with no evidence for a systematic bias.

scholarly journals Urine CA-2 as a biomarker for diagnosis urinary stone and prediction of its complications

2020 ◽  
Author(s):  
Yuan-jing Leng ◽  
Hai-bin Zhou ◽  
Jiang-ling Fu ◽  
Wen-juan Wang
Keyword(s):  
Healthy Subjects ◽  
Characteristic Curve ◽  
Urinary Stone ◽  
Urinary Stones ◽  
Enzyme Linked Immunosorbent Assay ◽  
Control Group ◽  
Healthy Control ◽  
The Mean ◽  
The Difference ◽  
The Relationship

Abstract PURPOSECarbonic anhydrase-2 (CA-2) plays a role in mineralization and calcification in organism. Strong evidence suggests that CA-2 is associated with urolithiasis. However, the relationship between CA-2 and urinary stone remains unclear. The study aimed to assess the association of urine CA-2 (uCA-2) level and the potential risk of urinary stone.METHODSFrom March 2017 to November 2019, a prospective cohort study was conducted on patients with urinary stones and healthy subjects to determine the pretreatment uCA-2 level detection by Enzyme linked immunosorbent assay (ELISA). The difference of uCA-2 level between patients with urinary stones and healthy subjects was compared. Then comparison between stone patients with complications and without complications was carried out as well as correlation analysis to detect factors associated with biomarker expression.RESULTS118 patients with urinary stones were into urinary stones group and 42 healthy subjects were into healthy control group. The mean pretreatment uCA-2 level was significantly higher in patients with urinary stones group than healthy controls group (P=0.028). Furthermore, The uCA-2 level was positive correlation with urinary stones complications (R=0.379, P=0.000), especially pain complications (R=0.524, P=0.000) and hematuria complications (R=0.374, P=0.000). Receiver operating characteristic curve (ROC) analysis that a uCA-2 level threshold of 10.94 ng/mL had 83.67% sensitivity and 68.12% specificity for predicting urinary stones complications. CONCLUSIONSExcessive uCA-2 excretion is a major risk factor for urinary stone. Our findings suggested that uCA-2 may be used as an unappreciated biomarker for the diagnosis urinary stone in patients and to predict its complications.

scholarly journals Inkonsistensi Kaidah dalam Buku Seri Penyuluhan Bahasa Indonesia dengan KBBI dan PUEBI

2020 ◽  
Vol 1 (1) ◽  
pp. 87-99
Author(s):  
Rahmad Hidayat ◽  
Mochammad Asyhar
Keyword(s):  
Error Analysis ◽  
Data Card ◽  
Problem Identification ◽  
Book Series ◽  
Problem Description ◽  
The Difference ◽  
Bahasa Indonesia

Abstrak: Penelitian ini hadir dalam rangka menguak inkonsistensi dalam Buku Seri Penyuluhan Bahasa Indonesia yang dipublikasikan oleh Badan Bahasa di laman resminya. Buku yang menjadi objek penelitian ini adalah buku Seri Penyuluhan Bahasa Indonesia: Ejaan dan buku Seri Penyuluhan Bahasa Indonesai: Bentuk dan Pilihan Kata. Data yang ditinjau kritis dalam objek penelitian ini adalah data yang menyimpang dari kaidah terbaru yang berlaku.  Prosedur penelitian ini mengikuti dua prosedur analisis kontrastif yang di dalam pembahasannya juga membicarakan kesalahan berbahasa. Prosedur penelitiannya adalah pengidentifikasian masalah dan pendeskripsian masalah. Pengidentifikasian masalah dilakukan dengan Metode Simak dan Teknik Catat. Setiap ditemukan inkonsistensi, peneliti mencatat dan sekaligus mengidentifikasi bentuk inkonsistensi itu pada kartu data, termasuk dalam tahap ini adalah pengklasifikasian data. Pada tahapan pendeskripsian masalah, digunakan pembandingan antara penjelasan dan contoh yang ada di objek penelitian dengan kaidah yang tercantum di dalam KBBI dan PUEBI. Perbedaan itu kemudian dideskripsikan sehingga didapatkanlah uraian yang representatif mengenai inkonsistensi kaidah dalam objek penelitian. Simpulan penelitian menyatakan bahwa terdapat penjelasan dan data yang ada di dalam objek penelitian bertentangan dengan kaidah terbaru yang berlaku. Pertentangan atau inkonsistensi itu ditemukan dalam setiap bagian objek penelitian. Abstract: This research is present in order to uncover inconsistencies in the Indonesian Counseling Book Series published by Badan Bahasa on its official page. The books that are the object of this research are the Spelling Counseling Series, the Forms and Choice of Counseling Series, the Grammar Counseling Series, and the Sentence Counseling Series. The data that is critically reviewed in this research object is data that deviates from the latest applicable rules. The procedure of this research follows two language error analysis procedures. The research procedures namely problem identification and problem description. Identifying the problem is done using Simak Method and Catat Technique. Every time an inconsistency is found, the researcher notes and simultaneously identifies the form of the inconsistency on the data card. At the stage of describing the problem, a comparison is used between the explanation and examples in the object of research with the rules that applied in KBBI and PUEBI. The difference found then described in order to obtain a representative description of the inconsistencies in the object of research. The conclusion of the study stated that there are explanations and data contained in the object of research contrary to the latest rules that applied. These contradictions or inconsistencies are found in every part of the research object.

scholarly journals Point Shear Wave Elastography of the Spleen in Predicting the Presence of Esophageal Varices in Cirrhosis: Liver Stiffness vs. Spleen Stiffness

2019 ◽  
Vol 36 (2) ◽  
pp. 95-101
Author(s):  
Nadella Sindhu ◽  
Prakashini Koteshwar ◽  
Shiran Shetty
Keyword(s):  
Esophageal Varices ◽  
Statistical Tests ◽  
Characteristic Curve ◽  
Liver Stiffness ◽  
Shear Wave Elastography ◽  
Significant Difference ◽  
Spleen Stiffness ◽  
Cirrhotic Patients ◽  
The Difference ◽  
Combined Parameters

Objective: To determine the diagnostic ability of the spleen and liver stiffness in predicting the presence of esophageal varices (EVs). Methods: A sample of cirrhotic patients, diagnosed with sonography, was recruited. The cohorts’ liver stiffness (LS) and spleen stiffness (SS) were measured with the Philips’ Elast PQ technique. Platelet count and spleen size were also documented. The endoscopic report was used as the diagnostic gold standard. Singular and combined parameters were assessed to determine the presence of EV using an independent variable t test, area under the receiver operating characteristic curve, and multilogistic regression analysis statistical tests. Results: In predicting the presence of EV, there was a statistically significant difference in means of SS (2.13 ± 0.69 m/s vs. 3.23 ± 1.32 m/s) and LS (2.33 ± 1.20 m/s vs. 3.05 ± 1.4 m/s), as well as discriminating between groups of patients, with and without EV. The ability to diagnostically classify EV with SS and LS was fair while the remaining parameters were deemed poor, using a SS cutoff value of 1.99 m/s. Conclusion: Despite the difference in means, none of the assessed parameters demonstrated a better classification ability than endoscopy. LS and SS were equal in the prediction of EV in these patients. The LS estimate of fibrosis would have grossly predicted the presence of varices. However, the addition of SS, for the estimation of varices, provided no significant benefit.

ANALISIS NILAI HAMBATAN TOTAL DENGAN PERUBAHAN SARAT KAPAL KM. KENDHAGA NUSANTARA 6

2020 ◽  
Vol 21 (1) ◽  
pp. 21-25
Author(s):  
Budi Utomo ◽  
Sulaiman Sulaiman
Keyword(s):  
Fluid Flow ◽  
Experimental Method ◽  
Calculation Method ◽  
Loading Condition ◽  
Total Resistance ◽  
Ship Resistance ◽  
The Difference ◽  
Resistance Value

The calculation of total resistance value is important of ship because  affects the speed of fluid flow that occurs, as well as the speed of the ship.So that in the designing new ships, sea trials are needed to find out whatever the preparedness of the ship is planned. The purpose is to obtain the value of the total resistance and the coefficient of ship resistance KM. Kendhaga Nusantara 6 uses the calculation method for each ship draught/loading condition. The Method used is experimental method with numerical value approach, Denny Mumford theory and Froude's number. The results show that the largest Total Resistance (Rt) is 5646,02 kN, it was found when speed of ship was 12 knots and draught ship 3,5 meters, with a coefficient value (Ct) of 7,757 x 10-3. The difference in value (Ct) is 0,032x10-3 or 0.41%, and it is still in the criteria because it is below 5%.

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