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Research Article | DOI: https://doi.org/10.31579/JACE.2019/001
1 Professor, Department of Civil Engineering, College of Engineering, University of Baghdad, Iraq.
2 MSc. Student, Department of Civil Engineering, College of Engineering, University of Baghdad, Iraq
*Corresponding Author: Professor, Department of Civil Engineering, College of Engineering, University of Baghdad, Iraq.
Citation: Saad I. Sarsam, Nazar S. Kadium (2019). Implementation of Nondestructive Test (NDT) to Model the Strength Properties of Asphalt Concrete. Advances in Architecture and Civil Engineering, 1(1): Doi: 10.31579/JACE.2019/001
Copyright: ©2019. Saad Issa Sarsam. This is an open-access article distributed under the termsof the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Received: 14 September 2019 | Accepted: 27 September 2019 | Published: 03 October 2019
Keywords: modeling; asphalt concrete; NDT; testing; pulse velocity; strength properties
Asphalt concrete is a composite material, it consists of aggregates, mineral filler and asphalt cement. Its mechanical behavior is complex due to its susceptibility of temperature, moisture, loading frequency, and strain level. The quality control process during construction of asphalt concrete pavement layers is labor, cost and time consuming. Implementation of nondestructive testing NDT could possess a sustainable solution for such issue. In this investigation, asphalt concrete specimens of wearing, binder and base courses have been prepared in the laboratory and subjected to Marshal and indirect tensile strength determination. Another group of specimens were subjected to temperature susceptibility evaluation. Specimens have practiced ultrasonic pulse velocity traversing the specimen using pundit instrument before conducting the strength test. The dynamic and seismic moduli have been calculated based on the ultrasonic pulse velocity. Test results were analyzed and modeled. A linear statistical model relating ultrasonic pulse velocity with the strength properties of asphalt concrete was obtained. It was concluded that such models can explain (75.4) % of the variation in the strength properties respectively under the testing techniques implemented.
Implementation of nondestructive test technique NDT and modeling the physical properties of asphalt concrete are considered as a sustainable issue. The quality control process during construction of asphalt concrete pavement layers is labor, cost and time consuming. Implementation of nondestructive testing NDT could possess a sustainable solution for such issue. The ultrasonic pulse velocity method of testing is one of the most widespread wave-based methods in nondestructive testing techniques NDT as reported by Zhou and Chen, 2019. However, its potential for assessing the quality of asphalt concrete materials is limited because it is only based on measurement of wave velocity, Jiang, 2007. NDT was implemented for testing of concrete, while there has been ongoing research on the use of ultrasonic testing for asphalt concrete mixtures. However, no standard wave-based test protocol is available yet for quality assessment of asphalt concrete, Witczak et al, 2002. The ultrasonic testing of asphalt concrete is considered difficult because the material is viscoelastic and susceptible to temperature variation. The composite characteristics of the materials result in scattering of waves and limit the penetration of waves into the object being investigated, Sztukiewicz 1992. The quality of asphalt concrete materials is often characterized by material properties such as dynamic modulus determined based on the simple performance tests recommended by the Federal Highway Administration (FHWA) Bonaquist et al., 2003. The dynamic modulus test is the oldest test recently modified for use as a part of simple performance tests for the evaluation of the long-term performance of asphalt concrete mixture, Tigdemir et al, 2004. Sarsam and Kadim, 2018 investigated the strength and volumetric properties of asphalt concrete wearing course using pulse velocity test. Specimens were prepared in the laboratory at various asphalt percentages and tested for pulse velocity, then subjected to indirect tensile strength and punching shear strength determination. The impact of moisture damage and testing temperature on pulse velocity were also investigated. It was concluded that implementation of non-destructive testing with the aid of pulse velocity is feasible for predicting the quality of asphalt concrete within the limitations of the testing program implemented. The good correlation between the pulse velocity and the volumetric and strength properties demonstrates the potential benefit of using the wave parameters for condition assessment of asphalt concrete. Surface wave data acquisition has successfully been used to determine dynamic modulus and thickness of the top asphalt concrete layer in the field. The principle is that the velocity of wave propagation depends on the elastic modulus, density, and Poisson’s ratio of the medium concerned. In practice, however, the velocity-strength relationship is affected by the combined effect of aggregate size, air void, and moisture condition which can cause some degree of variability in the results, Arabani et al, 2009.
The aim of this investigation is to model the strength properties of asphalt concrete with the aid of NDT. Specimens will be prepared and tested for strength, and sensitivity to temperature variation after practicing the ultrasonic pulse velocity test. The dynamic and seismic moduli will be calculated based on the ultrasonic pulse velocity. A statistical model could be obtained relating the pulse velocity with the strength properties.
Asphalt Cement
Asphalt cement of penetration grade (40-50) obtained from Dora refinery was implemented in this investigation; the physical properties of asphalt cement are listed in Table 1.
Coarse and Fine Aggregates
Crushed Coarse and fine aggregates have been obtained from Al-Nibaee quarry, Table 2 illustrates the physical properties of aggregates.
Mineral Filler
The mineral filler used in this work is limestone dust and was obtained from Karbala plant. The physical properties of the filler are presented in Table 3.
Selection of Asphalt Concrete Combined Gradation
The selected gradation in this work follows the SCRB, 2003 Specification for dense graded base, binder, and wearing courses, with (25, 19, and 12.5) mm nominal maximum size of aggregates. Figure 1 exhibits the implemented aggregate gradations.
Preparation of Hot Mix Asphalt Concrete
The aggregates were dried in an oven to a constant weight at 110 ºC, then sieved to different sizes, and stored separately. Coarse and fine aggregates were combined with mineral filler to meet the specified gradations of various asphalt concrete layers as per SCRB specifications shown in Figure 1. The combined aggregate mixture was heated to 150ºC before mixing with asphalt cement. The asphalt cement was heated to the same temperature of 150ºC, then it was added to the heated aggregate to achieve the desired amount and mixed thoroughly using mechanical mixer for two minutes until all aggregate particles were coated with thin film of asphalt cement.
Marshall Size specimens were prepared in accordance with ASTM D1559, 2013 using 75 blows of Marshall hammer on each face of the specimen for binder and wearing courses. On the other hand, 50 blows of Marshall hammer on each face of the specimen was implemented for base course. Specimens with optimum asphalt content and 0.5% of asphalt above and below the optimum have been prepared for each layer. Figure 2 shows part of the prepared specimens.
Ultrasonic Pulse Velocity Measurement
The portable ultrasonic non-destructive digital indicating tester (Pundit) was implemented in this study. The device generates and receives ultrasonic waves and has a digital display of the results. A frequency of 54 kHz and accuracy of 0.1 was implemented through this study to measure the ultrasonic pulse velocity for the specimens. The direct transmission arrangement was used in this study. The pulser and receiver were placed on opposite specimen parallel surfaces according to ASTM C597, 2013. Calibration of the pundit was done before testing to check the accuracy of the transit time measurements. This is achieved by the calibration with the reference bar. A thin layer of Vaseline oil was applied on the surface of the tested points to act as a couplet between the transducer and the asphalt concrete specimen’s surface and to prevent dissipation of transmitted energy. Eight readings were performed and averaged for each specimen. The ultrasonic pulse velocity test setup is demonstrated in Figure 3. All the prepared asphalt specimens have practiced the NDT before they were subjected to strength test.
Indirect Tensile Strength Test And Temperature Susceptibility
The indirect tension stress test as specified by ASTM, 2013 was conducted. The test was performed on the cylindrical specimens, 102 mm in diameter and 63.5 mm in height. The prepared Marshall Size Specimens of the three layers were subjected to the indirect tensile stress test at (25 and 40) ºC. Specimens have been tested in triplicate, and the average value was considered for analysis.
Marshal Stability and Flow
Part of the prepared specimens have been subjected to Marshal properties determination according to ASTM D1559, 2013. Table 4 demonstrates the strength properties obtained of various asphalt concrete mixtures implemented (independent variables).
Statistical Analysis and Modeling
The statistical analysis was implemented with the aid of statistical package (SPSS V22) software, Basheer, 2003 for the development of model relating the dependent variables (ultrasonic pulse velocity) to the number of independent variables including (Indirect tensile strength ITS at (25 and 40) °C, Temperature susceptibility TS, Marshal stability and Flow, Seismic and Dynamic moduli). A mathematical relationship between dependent and independent variables was the goal in mind of measuring future values of those predictors and inserting them into the mathematical relationship to predict future values of the target variable. It is desirable to give some measure of uncertainty for the predictions, typically a prediction interval that has some assigned level of confidence like 95%. Another task in the process is model building. Thus, a significant level of 0.05 was chosen. Model selection, fitting and validation are the basic steps of the model building process.
Identification Of Dependent And Independent Variables Of The Developed Model
To achieve the requirements of modeling, several variables were used. These variables are listed in Table 5.
Checking of the Sample Size
Sample size was checked as shown in Table 6 and calculated by using equation 1, kennedy and neville, 1986.
Sample Size = (Z- score) ² SD (1-SD) / (significant level) ² .......(1)
Where:
Z-score: constant value corresponding to the confidence level (for confidence level of 95%, Z-score= 1.96.
SD: standard deviation
Significant level: 0.05
Checking for Outliers.
The experimental work include collected data, the distribution of data contain of group concentrated within limited margin calculated from the frequency of data, but sometimes due to mistakes or other abnormal condition, a data set is considered as extreme or outliers by checking those extreme values using Chauvinist’s criterion and absolute tabulated sample size value as in Table 7. It was noticed that all tabulated values are more than the test results, thus, there are no outliers. To eliminate the data for modeling purposes to increase the R2, the standardized residuals are removed from data matrix. The standardized residuals are an indication of how the residuals are large in the standard deviation units, and it is equal to the observed minus the estimated value and divided by the standard deviation. In the case of nonlinear regression, the residuals of high absolute value are removed resulted from observed minus estimated values, (Montgomery et al, 2009).
Testing of Normality
Kolmogorov Smirnov (K-S) and Shapiro Wilk test was used to check the distribution of variables were used to developed model relate resilient modulus of asphalt mixture to numerals of variables. Herrin et al, 1995 stated that the K-S statistics D is based upon the maximum distance between F (y) and F n (y); that is equation 2. Table 8. show the result of normality checking of the model.
D=max. [F(y) - Fn(y)] …………. (2)
Where:
F(y) = Normal cumulative probabilities (From normal distribution table)
Fn (y) = Sample cumulative distribution function.
| Ultrasonic Pulse Velocity (mm/microsecond) | ||
N | 244 | ||
Normal Parameters | Mean | 3.7468 | |
Std. Deviation | 0.313 | ||
Most Extreme Differences |
| Absolute | .123 |
Positive | .123 | ||
Negative | -0.044 | ||
Test Statistic | 0.071 | ||
Kolmogorov-Smirnov Z | 4.999 | ||
Sig. (2-tailed) | .004
| ||
Table 8. Result of One Sample K-S Test
Multicollinearity
SPSS software version (22) is employed to find the correlation between independent variables with one another using Multicollinearity (collinearity and intercorrelation). A statistical procedure using stepwise regression technique. The independent variables are eliminated according to the significant contribution of X variable on the produced model. The process is repeated with each variable until significant predictor variable remained and the insignificant ones are removed. This Would suggest that those variables with high inter correlation may be eliminated according to the decision to add or remove a variable to improve the model; at that Point, interactions among the variables are considered. A correlation matrix is produced to determine the correlation coefficients for the Variables.
Stepwise Regression Model
The best and commonly method used to determine parameter of prediction model is stepwise method, Kennedy and neville, 1986. This method computes the simple regression model for each independent variable. The independent variable is with the largest F-statistic, in other words, the smallest p-value is chosen as the first entering variable. SPSS software uses the F-statistics and the standard is usually set at F=3.8, which is chosen because the significant level is about 5 %. The standard is called the F-to-enter. If at least one variable exceeds the standard, the procedure continues. It then considers whether the model would be improved by adding a second independent variable. It examines all such models to determine which is best and whether the F-statistic of the second variable (with the first variable already in the equation) is greater than F-to-enter. If two independent variables are highly correlated, only one of them will enter the equation. Once the first variable is included, the added explanatory power of the second variable will be minimal and its F-statistic will not be large enough to enter the model. Tables 9 show the summary of stepwise regression for the model while Table 10 exhibit the Coefficients.
Error analysis
For nonlinear model goodness, the homoscedasticity hypothesis assumes that the error is with constant variance, the standardized residual scatter plot as solve the problem, and by setting the estimated values of dependent variable on x axis and plotting the difference of observed value and theoretical value on y axis which is standardized residual, we can decide the goodness of the model. The pattern plots as demonstrated in Figure 4 is satisfactory and the residuals are randomly distributed.
Variance Analyses Of Anova Test
To check the significant differences of the independent variable s mean, the ANOVA is applied by F-test. The F -test called the test of linearity which determines by a straight line the deviations of means. Table 11 shows the ANOVA test for the model. The results show statistically significant relation since the p-value is less than 0.05, thus the overall variables used in regression (independent variables) are effective on the dependent variable. And by comparing the F ratio value with critical value from relative frequency distribution we decide the significances of results.
Model |
| Sum of Squares | df | Mean Square | F | Sig. | ||
1 | Regression |
| 20.943 | 12 | 1.745 | 59.962 | .000b | |
Residual |
| 7.160 | 246 | .029 |
|
| ||
Total |
| 28.103 | 258 |
|
|
| ||
|
Table 11 ANOVA for the Model
a. Dependent Variable: UPV.mm/micro sec | |||||||
|
| |||||||
| b. Predictors: (Constant), dynamic Modulus (GPa), ITS @40 (KPa), ITS @ 25C (KPa), temp. susceptibility, flow (mm), Seismic Modulus (GPa) | |||||||
Checking of R-critical.
A high correlation coefficient R value does not guarantee that the model fits the data well. The correlation between x and y is considered significant at the given probability level when the calculated R exceeds the tabulated R value. Table 12 demonstrates the calculated and tabulated R- value.
Model Limitation
The limitation of the data used to establish the model is presented in Table 13. The intention of the limitation is not to suggest that the modeling effort has not been successful. It merely serves to alert of the limitations of the data. Table 14 exhibits the developed model.
Where:
Dependent variable:
Ultrasonic pulse velocity = (mm/microseconds)
Independent variables:
F = Marshal Flow (mm)
DM = Dynamic Modulus (GPa)
TS = Temperature Susceptibility (kPa/ ̊ C)
SM = Seismic Modulus (GPa)
Validation of the Developed Model
The graphic plotting of observed and estimated data is a most useful method of evaluating the overall performance of a regression equation. If the point which result from the plot of estimated with observed data tend to stand nearby the line drawn at 45o, then the result model is considered satisfactory. This can be done by data splitting in to two sets. 70% of data are used to build the models and 30% of it is used for the validation process. Figure 5 shows the expected vs. observed data for dependent variable, the model is considered good because of the small variance of the points measured as compared with predicted values.
Based on the limitations of the testing program, the following conclusions may be drawn.
1- The developed linear statistical model can explain 75.4 % of the variations in ultrasonic pulse velocity among various strength properties.
2- The dynamic and seismic moduli of asphalt concrete exhibit significant influence on ultrasonic pulse velocity among other strength parameters.
3- Temperature susceptibility TS exhibit the lowest influence on ultrasonic pulse velocity, while Marshal Flow shows significant impact.
4- Such modeling is considered as a sustainable issue in predicting the strength properties of asphalt concrete, it can limit the testing requirements, time and cost of quality control.
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I would like to express my sincere gratitude for the support and efficiency provided by the editorial office throughout the publication process of my article, “Delayed Vulvar Metastases from Rectal Carcinoma: A Case Report.” I greatly appreciate the assistance and guidance I received from your team, which made the entire process smooth and efficient. The peer review process was thorough and constructive, contributing to the overall quality of the final article. I am very grateful for the high level of professionalism and commitment shown by the editorial staff, and I look forward to maintaining a long-term collaboration with the International Journal of Clinical Case Reports and Reviews.
To Dear Erin Aust, I would like to express my heartfelt appreciation for the opportunity to have my work published in this esteemed journal. The entire publication process was smooth and well-organized, and I am extremely satisfied with the final result. The Editorial Team demonstrated the utmost professionalism, providing prompt and insightful feedback throughout the review process. Their clear communication and constructive suggestions were invaluable in enhancing my manuscript, and their meticulous attention to detail and dedication to quality are truly commendable. Additionally, the support from the Editorial Office was exceptional. From the initial submission to the final publication, I was guided through every step of the process with great care and professionalism. The team's responsiveness and assistance made the entire experience both easy and stress-free. I am also deeply impressed by the quality and reputation of the journal. It is an honor to have my research featured in such a respected publication, and I am confident that it will make a meaningful contribution to the field.
"I am grateful for the opportunity of contributing to [International Journal of Clinical Case Reports and Reviews] and for the rigorous review process that enhances the quality of research published in your esteemed journal. I sincerely appreciate the time and effort of your team who have dedicatedly helped me in improvising changes and modifying my manuscript. The insightful comments and constructive feedback provided have been invaluable in refining and strengthening my work".
I thank the ‘Journal of Clinical Research and Reports’ for accepting this article for publication. This is a rigorously peer reviewed journal which is on all major global scientific data bases. I note the review process was prompt, thorough and professionally critical. It gave us an insight into a number of important scientific/statistical issues. The review prompted us to review the relevant literature again and look at the limitations of the study. The peer reviewers were open, clear in the instructions and the editorial team was very prompt in their communication. This journal certainly publishes quality research articles. I would recommend the journal for any future publications.
Dear Jessica Magne, with gratitude for the joint work. Fast process of receiving and processing the submitted scientific materials in “Clinical Cardiology and Cardiovascular Interventions”. High level of competence of the editors with clear and correct recommendations and ideas for enriching the article.
We found the peer review process quick and positive in its input. The support from the editorial officer has been very agile, always with the intention of improving the article and taking into account our subsequent corrections.
My article, titled 'No Way Out of the Smartphone Epidemic Without Considering the Insights of Brain Research,' has been republished in the International Journal of Clinical Case Reports and Reviews. The review process was seamless and professional, with the editors being both friendly and supportive. I am deeply grateful for their efforts.
To Dear Erin Aust – Editorial Coordinator of Journal of General Medicine and Clinical Practice! I declare that I am absolutely satisfied with your work carried out with great competence in following the manuscript during the various stages from its receipt, during the revision process to the final acceptance for publication. Thank Prof. Elvira Farina
Dear Jessica, and the super professional team of the ‘Clinical Cardiology and Cardiovascular Interventions’ I am sincerely grateful to the coordinated work of the journal team for the no problem with the submission of my manuscript: “Cardiometabolic Disorders in A Pregnant Woman with Severe Preeclampsia on the Background of Morbid Obesity (Case Report).” The review process by 5 experts was fast, and the comments were professional, which made it more specific and academic, and the process of publication and presentation of the article was excellent. I recommend that my colleagues publish articles in this journal, and I am interested in further scientific cooperation. Sincerely and best wishes, Dr. Oleg Golyanovskiy.
Dear Ashley Rosa, Editorial Coordinator of the journal - Psychology and Mental Health Care. " The process of obtaining publication of my article in the Psychology and Mental Health Journal was positive in all areas. The peer review process resulted in a number of valuable comments, the editorial process was collaborative and timely, and the quality of this journal has been quickly noticed, resulting in alternative journals contacting me to publish with them." Warm regards, Susan Anne Smith, PhD. Australian Breastfeeding Association.
Dear Jessica Magne, Editorial Coordinator, Clinical Cardiology and Cardiovascular Interventions, Auctores Publishing LLC. I appreciate the journal (JCCI) editorial office support, the entire team leads were always ready to help, not only on technical front but also on thorough process. Also, I should thank dear reviewers’ attention to detail and creative approach to teach me and bring new insights by their comments. Surely, more discussions and introduction of other hemodynamic devices would provide better prevention and management of shock states. Your efforts and dedication in presenting educational materials in this journal are commendable. Best wishes from, Farahnaz Fallahian.
Dear Maria Emerson, Editorial Coordinator, International Journal of Clinical Case Reports and Reviews, Auctores Publishing LLC. I am delighted to have published our manuscript, "Acute Colonic Pseudo-Obstruction (ACPO): A rare but serious complication following caesarean section." I want to thank the editorial team, especially Maria Emerson, for their prompt review of the manuscript, quick responses to queries, and overall support. Yours sincerely Dr. Victor Olagundoye.
Dear Ashley Rosa, Editorial Coordinator, International Journal of Clinical Case Reports and Reviews. Many thanks for publishing this manuscript after I lost confidence the editors were most helpful, more than other journals Best wishes from, Susan Anne Smith, PhD. Australian Breastfeeding Association.
Dear Agrippa Hilda, Editorial Coordinator, Journal of Neuroscience and Neurological Surgery. The entire process including article submission, review, revision, and publication was extremely easy. The journal editor was prompt and helpful, and the reviewers contributed to the quality of the paper. Thank you so much! Eric Nussbaum, MD
Dr Hala Al Shaikh This is to acknowledge that the peer review process for the article ’ A Novel Gnrh1 Gene Mutation in Four Omani Male Siblings, Presentation and Management ’ sent to the International Journal of Clinical Case Reports and Reviews was quick and smooth. The editorial office was prompt with easy communication.
Dear Erin Aust, Editorial Coordinator, Journal of General Medicine and Clinical Practice. We are pleased to share our experience with the “Journal of General Medicine and Clinical Practice”, following the successful publication of our article. The peer review process was thorough and constructive, helping to improve the clarity and quality of the manuscript. We are especially thankful to Ms. Erin Aust, the Editorial Coordinator, for her prompt communication and continuous support throughout the process. Her professionalism ensured a smooth and efficient publication experience. The journal upholds high editorial standards, and we highly recommend it to fellow researchers seeking a credible platform for their work. Best wishes By, Dr. Rakhi Mishra.
Dear Jessica Magne, Editorial Coordinator, Clinical Cardiology and Cardiovascular Interventions, Auctores Publishing LLC. The peer review process of the journal of Clinical Cardiology and Cardiovascular Interventions was excellent and fast, as was the support of the editorial office and the quality of the journal. Kind regards Walter F. Riesen Prof. Dr. Dr. h.c. Walter F. Riesen.
Dear Ashley Rosa, Editorial Coordinator, International Journal of Clinical Case Reports and Reviews, Auctores Publishing LLC. Thank you for publishing our article, Exploring Clozapine's Efficacy in Managing Aggression: A Multiple Single-Case Study in Forensic Psychiatry in the international journal of clinical case reports and reviews. We found the peer review process very professional and efficient. The comments were constructive, and the whole process was efficient. On behalf of the co-authors, I would like to thank you for publishing this article. With regards, Dr. Jelle R. Lettinga.
Dear Clarissa Eric, Editorial Coordinator, Journal of Clinical Case Reports and Studies, I would like to express my deep admiration for the exceptional professionalism demonstrated by your journal. I am thoroughly impressed by the speed of the editorial process, the substantive and insightful reviews, and the meticulous preparation of the manuscript for publication. Additionally, I greatly appreciate the courteous and immediate responses from your editorial office to all my inquiries. Best Regards, Dariusz Ziora
Dear Chrystine Mejia, Editorial Coordinator, Journal of Neurodegeneration and Neurorehabilitation, Auctores Publishing LLC, We would like to thank the editorial team for the smooth and high-quality communication leading up to the publication of our article in the Journal of Neurodegeneration and Neurorehabilitation. The reviewers have extensive knowledge in the field, and their relevant questions helped to add value to our publication. Kind regards, Dr. Ravi Shrivastava.
Dear Clarissa Eric, Editorial Coordinator, Journal of Clinical Case Reports and Studies, Auctores Publishing LLC, USA Office: +1-(302)-520-2644. I would like to express my sincere appreciation for the efficient and professional handling of my case report by the ‘Journal of Clinical Case Reports and Studies’. The peer review process was not only fast but also highly constructive—the reviewers’ comments were clear, relevant, and greatly helped me improve the quality and clarity of my manuscript. I also received excellent support from the editorial office throughout the process. Communication was smooth and timely, and I felt well guided at every stage, from submission to publication. The overall quality and rigor of the journal are truly commendable. I am pleased to have published my work with Journal of Clinical Case Reports and Studies, and I look forward to future opportunities for collaboration. Sincerely, Aline Tollet, UCLouvain.
Dear Ms. Mayra Duenas, Editorial Coordinator, International Journal of Clinical Case Reports and Reviews. “The International Journal of Clinical Case Reports and Reviews represented the “ideal house” to share with the research community a first experience with the use of the Simeox device for speech rehabilitation. High scientific reputation and attractive website communication were first determinants for the selection of this Journal, and the following submission process exceeded expectations: fast but highly professional peer review, great support by the editorial office, elegant graphic layout. Exactly what a dynamic research team - also composed by allied professionals - needs!" From, Chiara Beccaluva, PT - Italy.
Dear Maria Emerson, Editorial Coordinator, we have deeply appreciated the professionalism demonstrated by the International Journal of Clinical Case Reports and Reviews. The reviewers have extensive knowledge of our field and have been very efficient and fast in supporting the process. I am really looking forward to further collaboration. Thanks. Best regards, Dr. Claudio Ligresti
Dear Chrystine Mejia, Editorial Coordinator, Journal of Neurodegeneration and Neurorehabilitation. “The peer review process was efficient and constructive, and the editorial office provided excellent communication and support throughout. The journal ensures scientific rigor and high editorial standards, while also offering a smooth and timely publication process. We sincerely appreciate the work of the editorial team in facilitating the dissemination of innovative approaches such as the Bonori Method.” Best regards, Dr. Matteo Bonori.
I recommend without hesitation submitting relevant papers on medical decision making to the International Journal of Clinical Case Reports and Reviews. I am very grateful to the editorial staff. Maria Emerson was a pleasure to communicate with. The time from submission to publication was an extremely short 3 weeks. The editorial staff submitted the paper to three reviewers. Two of the reviewers commented positively on the value of publishing the paper. The editorial staff quickly recognized the third reviewer’s comments as an unjust attempt to reject the paper. I revised the paper as recommended by the first two reviewers.
Dear Maria Emerson, Editorial Coordinator, Journal of Clinical Research and Reports. Thank you for publishing our case report: "Clinical Case of Effective Fetal Stem Cells Treatment in a Patient with Autism Spectrum Disorder" within the "Journal of Clinical Research and Reports" being submitted by the team of EmCell doctors from Kyiv, Ukraine. We much appreciate a professional and transparent peer-review process from Auctores. All research Doctors are so grateful to your Editorial Office and Auctores Publishing support! I amiably wish our article publication maintained a top quality of your International Scientific Journal. My best wishes for a prosperity of the Journal of Clinical Research and Reports. Hope our scientific relationship and cooperation will remain long lasting. Thank you very much indeed. Kind regards, Dr. Andriy Sinelnyk Cell Therapy Center EmCell
Dear Editorial Team, Clinical Cardiology and Cardiovascular Interventions. It was truly a rewarding experience to work with the journal “Clinical Cardiology and Cardiovascular Interventions”. The peer review process was insightful and encouraging, helping us refine our work to a higher standard. The editorial office offered exceptional support with prompt and thoughtful communication. I highly value the journal’s role in promoting scientific advancement and am honored to be part of it. Best regards, Meng-Jou Lee, MD, Department of Anesthesiology, National Taiwan University Hospital.
Dear Editorial Team, Journal-Clinical Cardiology and Cardiovascular Interventions, “Publishing my article with Clinical Cardiology and Cardiovascular Interventions has been a highly positive experience. The peer-review process was rigorous yet supportive, offering valuable feedback that strengthened my work. The editorial team demonstrated exceptional professionalism, prompt communication, and a genuine commitment to maintaining the highest scientific standards. I am very pleased with the publication quality and proud to be associated with such a reputable journal.” Warm regards, Dr. Mahmoud Kamal Moustafa Ahmed
Dear Maria Emerson, Editorial Coordinator of ‘International Journal of Clinical Case Reports and Reviews’, I appreciate the opportunity to publish my article with your journal. The editorial office provided clear communication during the submission and review process, and I found the overall experience professional and constructive. Best regards, Elena Salvatore.
Dear Mayra Duenas, Editorial Coordinator of ‘International Journal of Clinical Case Reports and Reviews Herewith I confirm an optimal peer review process and a great support of the editorial office of the present journal
Dear Editorial Team, Clinical Cardiology and Cardiovascular Interventions. I am really grateful for the peers review; their feedback gave me the opportunity to reflect on the message and impact of my work and to ameliorate the article. The editors did a great job in addition by encouraging me to continue with the process of publishing.
Dear Cecilia Lilly, Editorial Coordinator, Endocrinology and Disorders, Thank you so much for your quick response regarding reviewing and all process till publishing our manuscript entitled: Prevalence of Pre-Diabetes and its Associated Risk Factors Among Nile College Students, Sudan. Best regards, Dr Mamoun Magzoub.
International Journal of Clinical Case Reports and Reviews is a high quality journal that has a clear and concise submission process. The peer review process was comprehensive and constructive. Support from the editorial office was excellent, since the administrative staff were responsive. The journal provides a fast and timely publication timeline.
Dear Maria Emerson, Editorial Coordinator of International Journal of Clinical Case Reports and Reviews, What distinguishes International Journal of Clinical Case Report and Review is not only the scientific rigor of its publications, but the intellectual climate in which research is evaluated. The submission process is refreshingly free of unnecessary formal barriers and bureaucratic rituals that often complicate academic publishing without adding real value. The peer-review system is demanding yet constructive, guided by genuine scientific dialogue rather than hierarchical or authoritarian attitudes. Reviewers act as collaborators in improving the manuscript, not as gatekeepers imposing arbitrary standards. This journal offers a rare balance: high methodological standards combined with a respectful, transparent, and supportive editorial approach. In an era where publishing can feel more burdensome than research itself, this platform restores the original purpose of peer review — to refine ideas, not to obstruct them Prof. Perlat Kapisyzi, FCCP PULMONOLOGIST AND THORACIC IMAGING.
Dear Mayra Duenas, Editorial Coordinator of the journal IJCCR, I write here a little on my experience as an author submitting to the International Journal of Clinical Case Reports and Reviews (IJCCR). This was my first submission to IJCCR and my manuscript was inherently an outsider’s effort. It attempted to broadly identify and then make some sense of life’s under-appreciated mysteries. I initially had responded to a request for possible submissions. I then contacted IJCCR with a tentative topic for a manuscript. They quickly got back with an approval for the submission, but with a particular requirement that it be medically relevant. I then put together a manuscript and submitted it. After the usual back-and-forth over forms and formality, the manuscript was sent off for reviews. Within 2 weeks I got back 4 reviews which were both helpful and also surprising. Surprising in that the topic was somewhat foreign to medical literature. My subsequent updates in response to the reviewer comments went smoothly and in short order I had a series of proofs to evaluate. All in all, the whole publication process seemed outstanding. It was both helpful in terms of the paper’s content and also in terms of its efficient and friendly communications. Thank you all very much. Sincerely, Ted Christopher, Rochester, NY.
Dear Grace Pierce, Editorial Coordinator of the journal IJCCR, I had a very positive experience with Auctores - Journal throughout the publication process. The Editorial Team was highly responsive, professional, and supportive at every stage. I would like to extend my sincere thanks to the Editor: Grace Pierce, for her guidance and assistance. The peer-review process was smooth and constructive, helping improve the quality of my work. I would gladly recommend Auctores Journal to fellow researchers and authors. Dr. SABITA SINHA, Medical Oncologist, MD (Electro Homeopathy).
Dear Maria Emerson, Editorial Coordinator of - Journal of Clinical Research and Reports. ''I am pleased to provide this testimonial following the publication of our recent case report in this journal. The peer review process was rigorous, constructive, thorough, and conducted in a timely manner. The reviewers’ comments were thoughtful, detailed, and highly constructive, contributing substantially to the refinement, clarity, and scientific robustness of our manuscript. The process was conducted with professionalism and academic integrity throughout. The support provided by the editorial office was exemplary. Communication was consistently prompt, clear, and courteous at all stages of the submission and publication process. The editorial team demonstrated a high level of organization and responsiveness, ensuring that all queries were addressed efficiently and that the process remained transparent and well-coordinated. The overall quality of the journal is reflected in its strong editorial standards, commitment to scientific excellence, and dedication to publishing clinically meaningful research. It has been a privilege to publish our work in this journal, and we would welcome the opportunity to contribute further in the future.'' Best wishes from, Dr. Efstratios Trogkanis, Cardiologist.
Dear Reader: We have published several articles in the Auctores Publishing, LLC, journal, Clinical Medical Reviews and Reports in recent years (CMRR). This is an ‘open access’ journal and the following are our observations. From the initial invitation to submit an article, to the final edits of galley proofs, we have found CMRR personnel to be professional, responsive, rapid and thorough. This entire process begins with Catherine Mitchell, Editorial Coordinator. She is simply outstanding, and, I believe, unparalleled in her capacity. I cannot imagine a more responsive and dedicated Editorial Coordinator. As I read the dates and timing of her correspondence with us, it seems that she never sleeps. I hope Auctores Publishing, LLC, appreciates her efforts as much as these authors do. Thank you to Auctores Publishing, LLC, to the Editorial Staff/Board, and to Catherine Mitchell from a grateful author(s).
