scholarly journals A Comparison of Lane Marking Detection Quality and View Range between Daytime and Night-Time Conditions by Machine Vision

Energies ◽  
2021 ◽  
Vol 14 (15) ◽  
pp. 4666
Author(s):  
Darko Babić ◽  
Dario Babić ◽  
Mario Fiolić ◽  
Arno Eichberger ◽  
Zoltan Ferenc Magosi
Keyword(s):  
Machine Vision ◽  
Lane Detection ◽  
Rank Test ◽  
Quality Level ◽  
Full Potential ◽  
Night Time ◽  
Paired Samples ◽  
Significant Difference ◽  
The Difference ◽  
Detection Quality

Lateral support systems in vehicles have a high potential for reduction of lane departure crashes. To profit from their full potential, such systems should function properly in adverse conditions. Literature indicates that their accuracy varies between day and night-time. However, detailed quantifications of the systems’ performance in these conditions are rare. The aim of this study is to investigate the differences in detection quality and view range of Mobileye 630 in dry daytime and night-time conditions. On-road tests on four rural road sections in Croatia were conducted. Wilcoxon signed-rank test was used to test the difference between the number of quality rankings while absolute average, average difference and standard deviation were used to analyse the view range. Also, a paired samples t-test was used to test the difference between conditions for each line on each road. The overall results confirm that a significant difference in lane detection quality view range exists between tested conditions. “Medium” and “high” detection confidence (quality level 3 and 2), increased by 5% and 8% during night-time compared to daytime while level 0 (“nothing detected”) decreased by 12%. The view range increased (almost 16% for middle line) during daytime compared to night-time. The findings of this study expand the existing knowledge and are valuable for research and development of machine-vision systems but also for road authorities to optimize the markings’ quality performance.

scholarly journals Cohort study of the overall survival of patients with pancreatic cancer in a hospital of specialties of Quito-Ecuador in the period 2007–2017

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Andrés Moreno Roca ◽  
Luciana Armijos Acurio ◽  
Ruth Jimbo Sotomayor ◽  
Carlos Céspedes Rivadeneira ◽  
Carlos Rosero Reyes ◽  
...  
Keyword(s):  
Pancreatic Cancer ◽  
Cohort Study ◽  
Survival Time ◽  
Univariate Analysis ◽  
Rank Test ◽  
Kaplan Meier ◽  
Significant Difference ◽  
Icd 10 ◽  
The Difference ◽  
Clinical Records

Abstract Objectives Pancreatic cancers in most patients in Ecuador are diagnosed at an advanced stage of the disease, which is associated with lower survival. To determine the characteristics and global survival of pancreatic cancer patients in a social security hospital in Ecuador between 2007 and 2017. Methods A retrospective cohort study and a survival analysis were performed using all the available data in the electronic clinical records of patients with a diagnosis of pancreatic cancer in a Hospital of Specialties of Quito-Ecuador between 2007 and 2017. The included patients were those coded according to the ICD 10 between C25.0 and C25.9. Our univariate analysis calculated frequencies, measures of central tendency and dispersion. Through the Kaplan-Meier method we estimated the median time of survival and analyzed the difference in survival time among the different categories of our included variables. These differences were shown through the log rank test. Results A total of 357 patients diagnosed with pancreatic cancer between 2007 and 2017 were included in the study. More than two-thirds (69.9%) of the patients were diagnosed in late stages of the disease. The median survival time for all patients was of 4 months (P25: 2, P75: 8). Conclusions The statistically significant difference of survival time between types of treatment is the most relevant finding in this study, when comparing to all other types of treatments.

scholarly journals Pre and Post test Clinical study to evaluate the Immunomodulatory effect (IgE) of Virecana followed by Citrakaharitaki Leha in Allergic Asthma

2021 ◽  
Vol 12 (1) ◽  
pp. 53-61
Author(s):  
Jyotish S Jayandan ◽  
James Chacko ◽  
Devipriya Soman ◽  
Mahesh C Kundagol
Keyword(s):  
Clinical Study ◽  
Allergic Asthma ◽  
Rank Test ◽  
Drug Induced ◽  
Paired Samples ◽  
Management Protocol ◽  
Post Test ◽  
Signed Rank Test ◽  
Significant Change ◽  
The Difference

Allergic Asthma is one among the diseases which imposes a great burden on the subjects by hampering the quality of life of patients, reducing productivity, and causing work absence. The literary search hinted that there are no published works reporting both clinical and immunological(IgE) outcomes in Allergic Asthma. So the present study was a pre and post test clinical study to evaluate the effect of Ayurvedic line of management in inducing both immunological(IgE) and clinical outcomes in Allergic Asthma. In this study 30 patients were administered classical Virecana Karma (drug induced purgation) followed by Shamanoushadi (internal medicine) for 30 days. Statistical Analysis was done using SPSS VER. 20. Wilcoxon signed rank test was used to evaluate the Subjective parameters, in order to interpret the time of significant change. For objective parameters Paired Samples t- Test was used to evaluate the difference of significant change. The results showed improvement in the subjective criteria, objective criteria and the overall effect of the therapy with the exception of no statistically significant results in immunomodulatory (IgE) effect which proves that the particular management protocol adopted is found to be clinically efficant but not effective in inducing changes at the immune level.

Utility of T2 mapping in the staging of thyroid-associated ophthalmopathy: efficiency of region of interest selection methods

2020 ◽  
Vol 61 (11) ◽  
pp. 1512-1519 ◽  
Author(s):  
Wen Chen ◽  
Hao Hu ◽  
Huan-Huan Chen ◽  
Guo-Yi Su ◽  
Tao Yang ◽  
...  
Keyword(s):  
T2 Mapping ◽  
Region Of Interest ◽  
Roc Curves ◽  
Rank Test ◽  
Selection Methods ◽  
Measuring Time ◽  
Significant Difference ◽  
Thyroid Associated Ophthalmopathy ◽  
Signed Rank Test ◽  
The Difference

Background Discriminating the stage of thyroid-associated ophthalmopathy (TAO) is crucial for the treatment strategy and prognosis prediction. Utility of conventional magnetic resonance imaging in the disease staging is limited. Purpose To investigate the performance of T2 mapping based on different region of interest (ROI) selection methods in the staging of TAO. Material and Methods Thirty-two patients with TAO were retrospectively enrolled. Two radiologists independently measured the T2 relaxation time (T2RT) of extraocular muscles using two different ROIs (hotspot [ROIHS]: T2RT-hot; single-slice [ROISS]: T2RT-mean, T2RT-max, T2RT-min). Independent-samples t test, Wilcoxon signed rank test, Spearman correlation analysis, receiver operating characteristic (ROC) curves analyses, multiple ROC comparisons, and intra-class correlation coefficient (ICC) were used for statistical analyses. Results No significant difference was found in the measuring time between ROIHS and ROISS methods ( P = 0.066). T2RT-mean demonstrated the highest ICC for measurement, followed by T2RT-max and T2RT-min, and T2RT-hot showed the poorest reproducibility. Active TAOs showed significantly higher values for all the T2RTs than inactive mimics (all P < 0.001). Significant positive correlations were found between T2RTs and CAS (all P < 0.005). T2RT-hot and T2RT-max showed significantly higher areas under the curve than that of T2RT-mean ( P = 0.013 and 0.024, respectively), while the difference between T2RT-hot and T2RT-max was not significant ( P = 0.970). Conclusion The T2RTs derived from both ROI selection methods could be useful for the staging of TAO. The results of measuring time, reproducibility, and diagnostic performance suggest that T2RT-max would be the optimal indicator for staging.

scholarly journals Frontal Alpha Complexity of Different Severity Depression Patients

2020 ◽  
Vol 2020 ◽  
pp. 1-8
Author(s):  
Lulu Zhao ◽  
Licai Yang ◽  
Baimin Li ◽  
Zhonghua Su ◽  
Chengyu Liu
Keyword(s):  
Neuronal Activity ◽  
Healthy Subjects ◽  
Sample Entropy ◽  
Rank Test ◽  
Mild Depression ◽  
Healthy Group ◽  
Significant Difference ◽  
Entropy Measures ◽  
The Difference ◽  
State Group

Depression is a leading cause of disability worldwide, and objective biomarkers are required for future computer-aided diagnosis. This study aims to assess the variation of frontal alpha complexity among different severity depression patients and healthy subjects, therefore to explore the depressed neuronal activity and to suggest valid biomarkers. 69 depression patients (divided into three groups according to the disease severity) and 14 healthy subjects were employed to collect 3-channel resting Electroencephalogram signals. Sample entropy and Lempel–Ziv complexity methods were employed to evaluate the Electroencephalogram complexity among different severity depression groups and healthy group. Kruskal–Wallis rank test and group t-test were performed to test the difference significance among four groups and between each two groups separately. All indexes values show that depression patients have significantly increased complexity compared to healthy subjects, and furthermore, the complexity keeps increasing as the depression deepens. Sample entropy measures exhibit superiority in distinguishing mild depression from healthy group with significant difference even between nondepressive state group and healthy group. The results confirm the altered neuronal activity influenced by depression severity and suggest sample entropy and Lempel–Ziv complexity as promising biomarkers in future depression evaluation and diagnosis.

Acetylated tubulin and risk of nodal metastases in squamous cell carcinoma of the head and neck (SCCHN).

2012 ◽  
Vol 30 (15_suppl) ◽  
pp. 5560-5560
Author(s):  
Nabil F. Saba ◽  
Kelly R. Magliocca ◽  
Sungjin Kim ◽  
Susan Muller ◽  
Zhengjia Chen ◽  
...  
Keyword(s):  
Smoking Status ◽  
Tumor Location ◽  
Nodal Metastasis ◽  
Rank Test ◽  
Nodal Metastases ◽  
Acetylated Tubulin ◽  
Response To Chemotherapy ◽  
Significant Difference ◽  
The Difference ◽  
Tissue Specimens

5560 Background: We previously established that AT expression predicts for response to chemotherapy in SCCHN (Saba et al, AACR 2010 meeting abstr 3744). We wanted to further examine the relation of AT expression and nodal metastases in SCCHN. Methods: We assessed AT expression in archival tissue specimens from primary SCCHN cases with (50 cases) and without (53 cases) lymph node metastases (NM) using standard immunohistochemistry (IHC). Clinical characteristics of patients were retrieved from the department of pathology under the guidelines of the institutional review board (IRB). IHC staining for AT was scored based on intensity and percentage of tumor cells stained: 0 = no staining, 1+ = weak, 2+ = moderate, 3+ = moderate to high, 4+ = high and a weighted index (WI) was calculated as percent stain x stain intensity. Wilcoxon two-sample test and Kruskal-Wallis test were used to estimate the relationships of the WI with nodal metastasis, node status, primary tumor location, grade, and stage. Log-rank test was used to examine the difference in OS and DFS among four groups based on quartiles of the WI. A Cox proportional hazard model was employed to estimate the adjusted effect of WI on OS and DFS. Results: A higher AT expression was associated with nodal metastasis (p=0.0155) and higher stage (p=0.0311). A lower AT expression was associated with oral cavity primary (p=0.0107). After adjusting for age, gender, race, and smoking status, a lower AT expression was significantly associated with better DFS in the subset of patients with NM by multivariate analysis (HR=1.008; 95% CI=1.002- 1.014; p=0.0123). Among patients with no NM there was a marginally significant difference in OS among four different groups based on quartiles of AT expression (p=0.0765). Conclusions: High AT expression is associated with nodal metastases in SCCHN and may be a marker of poor prognosis in patients with node positive disease. The value of AT as a prognostic marker in SCCHN needs to be better defined. This work is supported by a SPORE CDP Grant P50 CA128613-03 to NFS.

Association between intratumoral HER2 heterogeneity (IHH) and trastuzumab (T-mab) efficacy in HER2 positive–gastric cancer (GC).

2015 ◽  
Vol 33 (3_suppl) ◽  
pp. 92-92
Author(s):  
Takeru Wakatsuki ◽  
Noriko Yamamoto ◽  
Keisho Chin ◽  
Mariko Ogura ◽  
Eiji Shinozaki ◽  
...  
Keyword(s):  
Gastric Cancer ◽  
Statistical Tests ◽  
Progression Free Survival ◽  
Clinical Impact ◽  
Heterogeneous Group ◽  
Rank Test ◽  
Her2 Positive ◽  
Kaplan Meier ◽  
Significant Difference ◽  
The Difference

92 Background: ToGA study showed superiority of adding T-mab to standard chemotherapy and a positive correlation between HER2 expression levels and the T-mab efficacy. In gastric cancer IHH is frequently recognized but its clinical impact on T-mab efficacy is unclear. Methods: Patients who were treated with T-mab and had surgical specimens available for IHC test were retrospectively examined. When all tumor cells overexpressed HER2 protein by IHC, the tumor was defined as non-HER2-heterogeneous. The others were defined as HER2-heterogeneous. Progression-free survival (PFS) and overall survival (OS) were estimated using by Kaplan-Meier methods and compared by the log-rank test. The level of significance was set to p<0.05 and all statistical tests were two-sided. Results: 23 patients were enrolled. Their median age was 68 years and 83% were male. PS 0, GEJ cancer, intestinal type histology, visceral metastasis (lung or liver), and previous chemotherapy were found in 57%, 35%, 83%, 57%, and 57% of them, respectively. After a median follow-up of 11.3 months, the median OS, PFS, and overall response rate were 14.4 months, 10.8 months, and 62.5%, respectively. All tumors were IHC3+, and 13 were non-HER2-heterogeneous and 10 were HER2-heterogeneous. There was no significant difference in clinicopathological features between the two groups. Median PFS in non-HER2-heterogeneous group (21.9 months) was significantly longer than that in HER2-heterogeneous group (8.6 months), (HR: 0.24 [0.06-0.91], P=0.024). Median OS in non-HER2-heterogeneous group was not reached while that in HER2-heterogeneous group was 12.9 months (HR: 0.29 [0.06-1.42], P=0.102). A higher rate of response to T-mab was seen in non-HER2-heterogeneous group than in HER2-heterogeneous group, though the difference was not statistically significant (75% vs. 50%, p=0.608). Conclusions: IHH might have robust clinical impact on T-mab efficacy for HER2 positive GC. These findings should be validated by independent large cohorts and further molecular correlative analyses are warranted.

scholarly journals The Effects of Test Type, Pronunciation, and Proficiency Level on EFL Learners’ Speaking Exam Scores

2020 ◽  
Vol 10 (3) ◽  
pp. 95
Author(s):  
Kardelen Kilinc ◽  
Ozgur Yildirim
Keyword(s):  
Test Scores ◽  
Intermediate Level ◽  
Test Type ◽  
Speaking Test ◽  
Paired Samples ◽  
Proficiency Level ◽  
Significant Difference ◽  
Efl Students ◽  
Bivariate Regression ◽  
The Difference

The present study aims to reveal the effects of test type, pronunciation and proficiency levels of the students on speaking test scores. A total of 147 Turkish EFL students consisting of 38 beginner, 36 elementary, 37 pre-intermediate and 36 intermediate levels participated in the study. Presentation as planned, and paired speaking test as unplanned one were used as instruments to figure out the effects of two different test types on the test scores. Being prepared for their performances, the students did their presentations lasting between 5 and 8 minutes in front of two raters. The same participants, at the end of each level, were invited to the paired-speaking tests designed for the students to show their spontaneous performances. The performances in both tests were scored through a scale with five criteria, and the criteria along with overall scores were examined through Paired Samples t-test to reveal the effects of test type, and through bivariate regression to see the proportion of pronunciation aspect on overall scores. The results showed that in beginner level, although no differences were found in the overall scores, the test type induced differences in pronunciation, vocabulary and relevance aspect of their speaking performances. Similar results were found in elementary level besides the difference found in accuracy aspect, which resulted in a significant difference in overall scores. However, in pre-intermediate level, the only significant difference was found in pronunciation. On the other hand, in intermediate level all the aspects along with the overall scores were found to be affected by the test type except for fluency and pronunciation. The bivariate regression revealed that the effect of pronunciation sub-score on overall scores is significant in each level and test type.

scholarly journals THINK-PAIR-SHARE MODEL AS SOLUTION TO DEVELOP STUDENTS’ CRITICAL THINKING IN ISLAMIC STUDIES: IS IT EFFECTIVE?

2020 ◽  
Vol 39 (1) ◽  
pp. 144-155
Author(s):  
Mohammad Kurjum ◽  
Abdul Muhid ◽  
Muhammad Thohir
Keyword(s):  
Critical Thinking ◽  
Conventional Method ◽  
Statistical Technique ◽  
Control Group ◽  
Control Group Design ◽  
Islamic Studies ◽  
Paired Samples ◽  
Significant Difference ◽  
Equivalent Control ◽  
The Difference

One type of cooperative learning methods is Think Pair Share (TPS). This study aimed at examining the contribution of the TPS method in increasing students' critical thinking in Islamic studies. Particularly, the study investigated the significances of the difference between learned students using TPS method and conventional method, and the effectiveness of TPS learning method. This study used an experimental group and a control group. It is a quasi-experiment with pre-test and post-tests non equivalent control group design. The population of this research are students who take courses in Islamic studies. Samples are taken randomly by taking two classes for an experimental class and a control class. The technique of collecting data was tests, while the technique of data analysis used the statistical technique of t-test (independent and paired samples) within the application of the SPSS release 24 program. The results of the study indicate that there is a significant difference (sig .000) between groups of students who are taught by the TPS Method and conventional Method. In addition, the TPS method has also proven to be effective for teaching Islamic studies which shows a significant difference (sig .000) between the pre-test and post-test.

scholarly journals Early Plasma Creatinine Values in Discordant Twins

Twin Research ◽  
2001 ◽  
Vol 4 (4) ◽  
pp. 215-218 ◽  
Author(s):  
Ilan Arad ◽  
Benjamin Bar-Oz ◽  
Ofra Peleg
Keyword(s):  
Birth Weight ◽  
Plasma Creatinine ◽  
Rank Test ◽  
Plasma Urea ◽  
Placental Perfusion ◽  
Weight Difference ◽  
Significant Difference ◽  
The Mean ◽  
The Difference ◽  
Discordant Twins

AbstractIt has been suggested that impairment of placental perfusion prior to delivery may manifest in early postnatal increase of creatinine values. We hypothesized that the smaller of a discordant set of twins would have a higher initial plasma creatinine value and decided to measure early plasma creatinine levels in discordant twins in order to evaluate whether this value may serve as an index of impaired placental perfusion. Plasma creatinine, urea nitrogen and blood hematocrit values were simultaneously measured in 35 sets of twins during the first day of life. The sets of twins were divided into 2 groups according to birth weight difference. Thus, 18 sets of discordant twins with birth weight difference greater than 15% comprised the GT group and 17 sets of twins with birth weight difference less than or equal to 15% comprised the LE group. The differences between the values obtained within each group were analyzed using the Wilcoxon Signed Rank test. In the GT group the mean plasma creatinine level of the smaller twins was significantly higher than the level of the larger ones (p = 0.03), but there was no statistically significant difference between values obtained in twins of the LE group. The mean plasma urea level was higher in the larger twins of both groups, however only the difference in the GT group was statistically significant (p = 0.01). The mean hematocrit of the smaller twins was higher in both groups, but only the difference in the LE group was statistically significant (p = 0.02). Generally, there was a negative correlation between gestational age and early creatinine values. These results apparently support the notion that prenatal exposure to impaired placental perfusion may compromise the creatinine clearance of the fetus and result in higher early creatinine values. Since the creatinine values in our growth-retarded twins were within the normal range, no distinguishing line for evidence of a uterine-placental compromise could be drawn. Whether a certain early plasma creatinine value is suggestive or indicative of an intra-uterine hypoxic-ischemic insult, should be determined by documented instances of severe fetal compromise prior to delivery.

scholarly journals EVALUATION OF GLOMERULAR FILTRATION RATE ESTIMATING EQUATIONS IN CKD PATIENTS WITH DIABETES AND HYPERTENSION

2020 ◽  
pp. 49-52
Author(s):  
GANESH SRITHERAN PANEERSELVAM ◽  
YAMAN WALID KASSAB
Keyword(s):  
Blood Pressure ◽  
Blood Sugar ◽  
Kidney Function ◽  
Rank Test ◽  
Mdrd Equation ◽  
Ckd Stage ◽  
Significant Difference ◽  
Patients With Diabetes ◽  
The Difference ◽  
Sugar Levels

Objective: To compare the performance of Cockcroft-Gault and Modification of Diet in Renal Disease (MDRD) equations in estimating kidney function in CKD patients with diabetes and hypertension. Methods: This study retrospectively reviewed medical records in Hospital Kajang. The GFR was calculated using Cockcroft-Gault and MDRD equations. Kappa Measure of Agreement was used to check the consistency of CKD staging. Wilcoxon signed-ranked tests and Bland-Altman plots were used to determine the difference of both equations. Spearman correlation was used to determine the correlation between blood pressure and blood sugar levels with eGFR. Results: Data pertaining to a total of 81 patients were extracted. Results showed 22% of the patients were staged differently (Kappa value = 0.644 [P<0.001]) and the majority of them moved down one CKD stage when MDRD equation was used instead of Cockcroft-Gault equation. Wilcoxon signed rank test demonstrated there was a significant difference (P<0.001) in eGFR using CandG and MDRD in patients with diabetes and hypertension. Furthermore, the mean difference observed was 3.78±5.56 [P<0.001]), where the Cockcroft-Gault equation measured 3.78 units higher than MDRD equation. However, the relationship between blood sugar and blood pressure with eGFR were not significant. Conclusion: There was a significant difference between Cockcroft-Gault and MDRD equations in estimating kidney function CKD patients with diabetes and hypertension.

Sign in / Sign up

Export Citation Format

Share Document