Test: Execution and Reporting

2016 ◽  
pp. 137-152
Keyword(s):  
Test Execution

Flight Test Execution and Data Reduction Techniques of Exhaust Gas Reingestion on the CH-53K King Stallion

2021 ◽  
Author(s):  
Noopur Joshi ◽  
Noah Becker ◽  
Roger Tull ◽  
James Kenna ◽  
Christopher Adams ◽  
...  
Keyword(s):  
Data Reduction ◽  
Flight Test ◽  
Exhaust Gas ◽  
Test Execution ◽  
Reduction Techniques

MO143UTILITY OF SIFT-MS TO EVALUATE VOLATILE ORGANIC COMPOUNDS IN NEPHROPATHIC PATIENTS' BREATH

2021 ◽  
Vol 36 (Supplement_1) ◽  
Author(s):  
Annalisa Romani ◽  
Anna Pietroboni Zaitseva ◽  
Andrea Carretta ◽  
Giulia Marrone ◽  
Chiara Vita ◽  
...  
Keyword(s):  
Volatile Organic Compounds ◽  
Real Time ◽  
Organic Compounds ◽  
Roc Curve ◽  
Lazio Region ◽  
Test Execution ◽  
Inflammatory Status ◽  
Ckd Stage ◽  
Volatile Organic ◽  
Selected Ion Flow Tube

Abstract Background and Aims Breath analysis techniques allow detection and quantification of multiple analytes present in breath to the low parts per billion volume (ppbv) level. One such technique is selected ion flow tube–mass spectrometry (SIFT-MS), which can measure numerous volatile organic compounds (VOCs) in breath on-line and in real-time. This technique has already been used in an innovative manner to monitor infectious, inflammatory status and metabolic conditions. However, there is no evidence on its use in ambulatory patients with chronic kidney disease (CKD). End-stage-renal-disease patients are characterized by "uremic halitosis" caused by the accumulation of uremic toxins that are detectable in breath such as ammonia and amines. The aims of this study are identifying a possible correlation between the detected VOCs and the presence of CKD, moreover, exploring the range of VOCs levels in patients with different CKD stage. Method In the present study, a mobile Voice200ultra® SIFT-MS instrument was made available by the Agilent SRA Division. The SIFT-MS allowed to quantify the VOCs in CKD patients. The SIFT-MS uses a precise and controlled application of “soft” chemical ionization. We enrolled 50 CKD patients, divided into two subgroups according to the estimated glomerular filtration rate (eGFR): eGFR ≥30 mL/min/1.73m2 (A) and eGFR <30 mL/min/1.73m2 (B) compared to 18 healthy subjects (C). The anamnestic data and information about any comorbidities such as arterial hypertension, cardiovascular and metabolic diseases, were collected for each patient. In order to reduce the possible interferences in the exhaled composition induced by different lifestyles, all participants were instructed to perform hygienic procedures before the test execution. The exhaled was sampled through the use of a standard spirometry mouthpiece for single use, directly connected with the input probe to the MS detector of the instrument that was able to detect more than 30 VOCs. The processing of the sample was made through the direct use of an internal comparison library (Syft library). The SIFT-MS software instantly calculates the absolute concentration of the target compounds by interpolating mass-to-charge ratios, reaction rate coefficients and branching ratios. Results Among all the VOCs analyzed, the most significant results are observed for ammonia and isoprene. In particular, the ROC curve of ammonia highlighted statistically significant differences between the three subgroups respectively A vs C AUC=0,756 p=0,001; B vs C AUC=0,942 p<0,001; A vs B AUC=0,797 p<0,001 (Figure 1). Youden index J between subgroups B and C defines the best cut-off =0,8704 associated with the criterion ammonia concentration ≤4700 ppbv with sensitivity =94,44% and specificity = 92,59%. The ROC curve of isoprene showed statistically significant differences between the three subgroups respectively B vs C AUC=0,669 p=0,050; A vs B AUC=0,691 p=0,014 (Figure 2). These data allow us to define this a highly accurate test. The same significant results were observed also with Anova one-way test that highlighted an inversely correlation between the ammonia breath concentration and eGFR, and a direct correlation between isoprene and eGFR. Conclusion This preliminary data confirms the potential utility of SIFT-MS for the CKD diagnosis and the possible relation between the VOCs concentration and CKD stage. This exam could be a new, non-invasive, fast-performing diagnostic technique with real-time results useful for clinical management of CKD. The study was inserted in the projects: “MioMenù: nuova filiera dell’agro-industria e una cucina tracciata natura/benessere- Lazio Region” and “BioSynOL- Oil and Legumes: biodynamic and synergistic crops for naturally fortified foods and innovative products for health and sport – G.O.Tuscany Region”.

Parallel Test Prioritization

2022 ◽  
Vol 31 (1) ◽  
pp. 1-50
Author(s):  
Jianyi Zhou ◽  
Junjie Chen ◽  
Dan Hao
Keyword(s):  
Extensive Study ◽  
Good Choice ◽  
Regression Testing ◽  
Sequential Test ◽  
Testing Time ◽  
Parallel Test ◽  
Parallel Testing ◽  
Test Execution ◽  
Coverage Criterion ◽  
Test Prioritization

Although regression testing is important to guarantee the software quality in software evolution, it suffers from the widely known cost problem. To address this problem, existing researchers made dedicated efforts on test prioritization, which optimizes the execution order of tests to detect faults earlier; while practitioners in industry leveraged more computing resources to save the time cost of regression testing. By combining these two orthogonal solutions, in this article, we define the problem of parallel test prioritization, which is to conduct test prioritization in the scenario of parallel test execution to reduce the cost of regression testing. Different from traditional sequential test prioritization, parallel test prioritization aims at generating a set of test sequences, each of which is allocated in an individual computing resource and executed in parallel. In particular, we propose eight parallel test prioritization techniques by adapting the existing four sequential test prioritization techniques, by including and excluding testing time in prioritization. To investigate the performance of the eight parallel test prioritization techniques, we conducted an extensive study on 54 open-source projects and a case study on 16 commercial projects from Baidu , a famous search service provider with 600M monthly active users. According to the two studies, parallel test prioritization does improve the efficiency of regression testing, and cost-aware additional parallel test prioritization technique significantly outperforms the other techniques, indicating that this technique is a good choice for practical parallel testing. Besides, we also investigated the influence of two external factors, the number of computing resources and time allowed for parallel testing, and find that more computing resources indeed improve the performance of parallel test prioritization. In addition, we investigated the influence of two more factors, test granularity and coverage criterion, and find that parallel test prioritization can still accelerate regression testing in parallel scenario. Moreover, we investigated the benefit of parallel test prioritization on the regression testing process of continuous integration, considering both the cumulative acceleration performance and the overhead of prioritization techniques, and the results demonstrate the superiority of parallel test prioritization.

scholarly journals Comparison of Test Measurements Taken on a Pipeline Compressor / Gas Turbine Unit in the Workshop and at Site

1995 ◽  
Author(s):  
W. Schmitt ◽  
V. Thomas
Keyword(s):  
Reynolds Number ◽  
Gas Turbine ◽  
Turbine Unit ◽  
Test Results ◽  
Gas Turbine Unit ◽  
Test Installation ◽  
Measuring Methods ◽  
Test Execution ◽  
The Third ◽  
Load Conditions

The first part of this paper describes the test installation of the gas turbine and the compressor in the workshop, test execution, measuring methods, evaluation and measuring uncertainties. The second part of this paper describes the site installation, execution of the test under full load conditions on natural gas, measuring methods, evaluation and measuring uncertainties. The third part of this paper compares both the measurements and the Reynolds number correction which was used for the evaluation of the pipeline compressor test results in the workshop.

An Experience-Based Approach for Test Execution Effort Estimation

2008 ◽  
Author(s):  
Xiaochun Zhu ◽  
Bo Zhou ◽  
Li Hou ◽  
Junbo Chen ◽  
Lu Chen
Keyword(s):  
Effort Estimation ◽  
Test Execution

Test Execution with JUnit

2007 ◽  
pp. 149-156
Author(s):  
Paul Baker ◽  
Zhen Ru Dai ◽  
Jens Grabowski ◽  
Øystein Haugen ◽  
Ina Schieferdecker ◽  
...  
Keyword(s):  
Test Execution
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