research paper on modal analysis

Academia.edu no longer supports Internet Explorer.

To browse Academia.edu and the wider internet faster and more securely, please take a few seconds to  upgrade your browser .

Enter the email address you signed up with and we'll email you a reset link.

• We're Hiring!
• Help Center

Experimental Modal Analysis of a Flat Plate Subjected To Vibration

Modal analysis is significant in evaluating the mode shapes generated by a component under vibrational excitation, as the mode shapes can be used to determine the displacement or response of the component under the influence vibration in real life application. Result obtained from the modal analysis will generate a number of resonances which the frequency and damping effect can be determined by measurement. However, determining the accuracy of modal analysis result is somewhat difficult as the experimental results and the results generated by Finite Element Analysis (FEA) solvers can be affected by a number of factors pointed out in this paper. In this study, a flat plate was mounted on an electromagnetic shaker which enabled the excitation of the plate, while results of the response were measured using a transducer attached to the plate. The plate was also modelled using CATIA software and the files transferred to the different FEA solvers such as HYPERMESH, ANSYS 6 Degree of Freedom (DOF) as well as ANSYS 5 degree of freedom, in which the same analysis was carried out to obtain a set of results other than the experimental results. Each FEA solver generated results that were in close proximity with the experimental results, particularly the results generated by ANSYS 5 Degree of freedom. Hence, to ascertain the accuracy of the results obtained from modal analysis experimental procedure, it is important to match up the results generated from different FEA solvers with the experimental results.

Related Papers

Promio Charles

Shock and Vibration

Antonio Zippo

In this paper, the dynamic behavior of 3D-printed plates with different shapes and boundary conditions is investigated. The natural frequencies and mode shapes were determined using three different methods: the experimental analysis, the finite element method, using Nastran, and the R-functions method. The experimental and theoretical results are compared. The specimens tested included four cases. The test procedure is deeply described, and the material properties of the plates are given. The fixed-fixed configuration shows a better agreement both in the rectangular plate and in the plate with rectangular cuts, and the R-functions method gives better convergence with respect to the experimental and finite element analysis. The simply supported arrangement indicates some uncertainty in the boundary realization of the specimen.

Punit Patel

IRJET Journal

Due to their strong resistance to shocks and vibrations, composite plates have found extensive use in a variety of engineering fields, including the aerospace, marine, and automotive industries. The vibratory behavior of thin plates has evolved into a significant and crucial factor that must be taken into consideration when designing structural elements because it is at the core of many issues that can destroy structures. The positions into which a structure will predictably be displaced are described by mode shapes. Structures cannot be considered safe based on their load-carrying capacity, but they should also be safe considering structural dynamic aspects. The offending mode is identified using modal analysis. This work explores the effect of material, laminate stacking sequence, geometry, and edge conditions on modal behavior. For the analysis, carbon-epoxy and T300/5208 graphite/epoxy composite materials are taken into consideration, and aluminum alloy is taken into consideration for isotropic plate simulations. To investigate how fiber orientation affects natural frequencies and associated mode shapes, the fiber angle is altered. The mode shapes and initial six natural frequencies are obtained. Based on the findings, a better boundary condition is suggested for applications with a narrow operating frequency range.

International Journal of Integrated Engineering

Vibroengineering PROCEDIA

Vedanth Bhatnagar

Anna Danuta Kaczmarek , Kazimierz Orlowski

In this paper results of the square MDF plate and circular saw blades examination with the use of the harmonic method to static identification of resonant frequencies and shapes of mode vibrations are presented. Obtained results revealed that for circular saws with large holes in a saw blade appeared two resonant frequencies for the same nodal number.

Bulletin of the Transilvania University of Braşov

Fetea Marius Serban

The paper aims is to determine the modal and total responses of an isotropic rectangular flat plates. As is known, for the rectangular flat plates, the modal analysis method is applied to an infinite number of degrees of freedom. The study has been made considering the simplifying hypothesis according to which the plate material is isotropic. The studied plate considered in the paper is loaded on its surface by a uniformly distributed harmonic force. In applying modal analysis the damping was considered neglected.

Journal of emerging technologies and innovative research

NILESH NAVAGALE

Kaushal Patil

There are variety of engineering applications where structures subjected to vibrations and uneven noise. There are numerous techniques to study the vibration behavior of structures such as FEA and experimental modal analysis, same in harmonic analysis, mathematical modeling is another way. It predicts various modes of vibration. Plate because of high strength to weight ratio are in use for many structural applications. Such structures are subjected to dynamic load many times over its life span. Strength of these structures is increased by adding stiffeners to its plate. This paper deals with the vibration analysis of stiffened plates which forms the basis of structures. In order to continue this analysis various research papers were studied to understand the previous tasks done for stiffened plate. By considering various profiles of stiffeners and there arrangement studied by all the researchers is tabulated in one window. Various FEA software's like ANSYS WORKBENCH, NASTRAN, HY...

RELATED PAPERS

Transplantation

Eduardo Mancilla Urrea

The Quarterly Journal of Mathematics

Pjek-Hwee Lee

Frontiers in Molecular Neuroscience

Elisabeth Bock

Anjana Ningombam

Karen Spektor-Precel

波士顿大学毕业证成绩单原版仿制 波士顿大学文凭学历证书

Cristiane Takeda

Ghamartaj Khanbabaee

Przemysław Wójcik

arXiv (Cornell University)

Boris Malomed

ANALISIS PEMAHAMAN MAHASISWA TERHADAP MINAT MENABUNG DI BANK SYARIAH YANG DI MEDIASI DENGAN RELIGIUSITAS MAHASISWA

Linda Herlina

Pindi Patana

Antti I . Koponen

UCLA文凭证书 加州大学洛杉矶分校文凭证书 klhjkgh

Journal of the American Medical Directors Association

Giuseppe Bellelli

Therapeutic Drug Monitoring

robert hernandez

The Lancet. Respiratory medicine

Jennifer Nuzzo

Bulletin of the American Physical Society

Nikil Kapur

2010 First International Conference on Sensor Device Technologies and Applications

Michele Rossi

RELATED TOPICS

•   We're Hiring!
•   Help Center
• Find new research papers in:
• Health Sciences
• Earth Sciences
• Cognitive Science
• Mathematics
• Computer Science
• Academia ©2024

Help | Advanced Search

Computer Science > Computer Vision and Pattern Recognition

Title: video-mme: the first-ever comprehensive evaluation benchmark of multi-modal llms in video analysis.

Abstract: In the quest for artificial general intelligence, Multi-modal Large Language Models (MLLMs) have emerged as a focal point in recent advancements. However, the predominant focus remains on developing their capabilities in static image understanding. The potential of MLLMs in processing sequential visual data is still insufficiently explored, highlighting the absence of a comprehensive, high-quality assessment of their performance. In this paper, we introduce Video-MME, the first-ever full-spectrum, Multi-Modal Evaluation benchmark of MLLMs in Video analysis. Our work distinguishes from existing benchmarks through four key features: 1) Diversity in video types, spanning 6 primary visual domains with 30 subfields to ensure broad scenario generalizability; 2) Duration in temporal dimension, encompassing both short-, medium-, and long-term videos, ranging from 11 seconds to 1 hour, for robust contextual dynamics; 3) Breadth in data modalities, integrating multi-modal inputs besides video frames, including subtitles and audios, to unveil the all-round capabilities of MLLMs; 4) Quality in annotations, utilizing rigorous manual labeling by expert annotators to facilitate precise and reliable model assessment. 900 videos with a total of 256 hours are manually selected and annotated by repeatedly viewing all the video content, resulting in 2,700 question-answer pairs. With Video-MME, we extensively evaluate various state-of-the-art MLLMs, including GPT-4 series and Gemini 1.5 Pro, as well as open-source image models like InternVL-Chat-V1.5 and video models like LLaVA-NeXT-Video. Our experiments reveal that Gemini 1.5 Pro is the best-performing commercial model, significantly outperforming the open-source models. Our dataset along with these findings underscores the need for further improvements in handling longer sequences and multi-modal data. Project Page: this https URL

Submission history

Access paper:.

• HTML (experimental)
• Other Formats

References & Citations

• Google Scholar
• Semantic Scholar

BibTeX formatted citation

Bibliographic and Citation Tools

Code, data and media associated with this article, recommenders and search tools.

• Institution

arXivLabs: experimental projects with community collaborators

arXivLabs is a framework that allows collaborators to develop and share new arXiv features directly on our website.

Both individuals and organizations that work with arXivLabs have embraced and accepted our values of openness, community, excellence, and user data privacy. arXiv is committed to these values and only works with partners that adhere to them.

Have an idea for a project that will add value for arXiv's community? Learn more about arXivLabs .

Subscribe to the PwC Newsletter

Join the community, edit social preview.

Add a new code entry for this paper

Remove a code repository from this paper, mark the official implementation from paper authors, add a new evaluation result row, remove a task, add a method.

• LAYER NORMALIZATION
• TRANSFORMER

Remove a method

• LAYER NORMALIZATION -
• TRANSFORMER -

Edit Datasets

Video-mme: the first-ever comprehensive evaluation benchmark of multi-modal llms in video analysis.

31 May 2024  ·  Chaoyou Fu , Yuhan Dai , Yondong Luo , Lei LI , Shuhuai Ren , Renrui Zhang , Zihan Wang , Chenyu Zhou , Yunhang Shen , Mengdan Zhang , Peixian Chen , Yanwei Li , Shaohui Lin , Sirui Zhao , Ke Li , Tong Xu , Xiawu Zheng , Enhong Chen , Rongrong Ji , Xing Sun · Edit social preview

In the quest for artificial general intelligence, Multi-modal Large Language Models (MLLMs) have emerged as a focal point in recent advancements. However, the predominant focus remains on developing their capabilities in static image understanding. The potential of MLLMs in processing sequential visual data is still insufficiently explored, highlighting the absence of a comprehensive, high-quality assessment of their performance. In this paper, we introduce Video-MME, the first-ever full-spectrum, Multi-Modal Evaluation benchmark of MLLMs in Video analysis. Our work distinguishes from existing benchmarks through four key features: 1) Diversity in video types, spanning 6 primary visual domains with 30 subfields to ensure broad scenario generalizability; 2) Duration in temporal dimension, encompassing both short-, medium-, and long-term videos, ranging from 11 seconds to 1 hour, for robust contextual dynamics; 3) Breadth in data modalities, integrating multi-modal inputs besides video frames, including subtitles and audios, to unveil the all-round capabilities of MLLMs; 4) Quality in annotations, utilizing rigorous manual labeling by expert annotators to facilitate precise and reliable model assessment. 900 videos with a total of 256 hours are manually selected and annotated by repeatedly viewing all the video content, resulting in 2,700 question-answer pairs. With Video-MME, we extensively evaluate various state-of-the-art MLLMs, including GPT-4 series and Gemini 1.5 Pro, as well as open-source image models like InternVL-Chat-V1.5 and video models like LLaVA-NeXT-Video. Our experiments reveal that Gemini 1.5 Pro is the best-performing commercial model, significantly outperforming the open-source models. Our dataset along with these findings underscores the need for further improvements in handling longer sequences and multi-modal data. Project Page: https://video-mme.github.io

Code Edit Add Remove Mark official

Tasks edit add remove, datasets edit.

Results from the Paper Edit

Methods edit add remove.

The future of financial analysis: How GPT-4 is disrupting the industry, according to new research

• Share on Facebook
• Share on LinkedIn

Time's almost up! There's only one week left to request an invite to The AI Impact Tour on June 5th. Don't miss out on this incredible opportunity to explore various methods for auditing AI models. Find out how you can attend here .

Researchers from the University of Chicago have demonstrated that large language models (LLMs) can conduct financial statement analysis with accuracy rivaling and even surpassing that of professional analysts. The findings, published in a working paper titled “ Financial Statement Analysis with Large Language Models ,” could have major implications for the future of financial analysis and decision-making.

The researchers tested the performance of GPT-4 , a state-of-the-art LLM developed by OpenAI , on the task of analyzing corporate financial statements to predict future earnings growth. Remarkably, even when provided only with standardized, anonymized balance sheets, and income statements devoid of any textual context, GPT-4 was able to outperform human analysts.

“We find that the prediction accuracy of the LLM is on par with the performance of a narrowly trained state-of-the-art ML model,” the authors write. “LLM prediction does not stem from its training memory. Instead, we find that the LLM generates useful narrative insights about a company’s future performance.”

Chain-of-thought prompts emulate human analyst reasoning

A key innovation was the use of “ chain-of-thought ” prompts that guided GPT-4 to emulate the analytical process of a financial analyst, identifying trends, computing ratios, and synthesizing the information to form a prediction. This enhanced version of GPT-4 achieved a 60% accuracy in predicting the direction of future earnings, notably higher than the 53-57% range of human analyst forecasts.

June 5th: The AI Audit in NYC

Join us next week in NYC to engage with top executive leaders, delving into strategies for auditing AI models to ensure optimal performance and accuracy across your organization. Secure your attendance for this exclusive invite-only event.

“Taken together, our results suggest that LLMs may take a central role in decision-making,” the researchers conclude. They note that the LLM’s advantage likely stems from its vast knowledge base and ability to recognize patterns and business concepts, allowing it to perform intuitive reasoning even with incomplete information.

LLMs poised to transform financial analysis despite challenges

The findings are all the more remarkable given that numerical analysis has traditionally been a challenge for language models. “One of the most challenging domains for a language model is the numerical domain, where the model needs to carry out computations, perform human-like interpretations, and make complex judgments,” said Alex Kim, one of the study’s co-authors. “While LLMs are effective at textual tasks, their understanding of numbers typically comes from the narrative context and they lack deep numerical reasoning or the flexibility of a human mind.”

Some experts caution that the “ ANN ” model used as a benchmark in the study may not represent the state-of-the-art in quantitative finance. “That ANN benchmark is nowhere near state of the art,” commented one practitioner on the Hacker News forum . “People didn’t stop working on this in 1989 — they realized they can make lots of money doing it and do it privately.”

Nevertheless, the ability of a general-purpose language model to match the performance of specialized ML models and exceed human experts points to the disruptive potential of LLMs in the financial domain. The authors have also created an interactive web application to showcase GPT-4’s capabilities for curious readers, though they caution that its accuracy should be independently verified.

As AI continues its rapid advance, the role of the financial analyst may be the next to be transformed. While human expertise and judgment are unlikely to be fully replaced anytime soon, powerful tools like GPT-4 could greatly augment and streamline the work of analysts, potentially reshaping the field of financial statement analysis in the years to come.

Stay in the know! Get the latest news in your inbox daily

By subscribing, you agree to VentureBeat's Terms of Service.

Thanks for subscribing. Check out more VB newsletters here .

An error occured.

Financial Statement Analysis with Large Language Models

Experimental Modal Analysis Involving the Use of Artificial Intelligence to Accurately Evaluate the Natural Frequencies of Engineering Structures

• Conference paper
• First Online: 11 April 2024
• Cite this conference paper

• Daniela Georgiana Burtea   ORCID: orcid.org/0009-0002-9912-5796 3 ,
• Rusalin-Lucian Paun   ORCID: orcid.org/0009-0007-9267-3008 3 ,
• Nicoleta Gillich   ORCID: orcid.org/0000-0001-5445-3468 3 &
• Gilbert-Rainer Gillich   ORCID: orcid.org/0000-0003-4962-2567 3 , 4  

Part of the book series: Springer Proceedings in Physics ((SPPHY,volume 302))

Included in the following conference series:

• International Conference on Acoustics and Vibration of Mechanical Structures

23 Accesses

There are several well-known methods that can be used to improve the estimate of the frequency for short signals such as the response of a structure to an impulsive excitation. However, the accuracy of the estimates is insufficient, thus more advanced methods are requested. We propose a machine learning approach to estimate the frequency values between the spectral lines of the Discrete Fourier Transform (DFT). The method involves Artificial intelligence and uses the data obtained by applying the DFT to a sinusoidal signal with known frequency and amplitude and varying lengths in time. The peak amplitudes in the spectrum have a similar shape to that of the sinusoidal signal generated. To determine this amplitude, we preprocess the signal by zero padding. Then we find the frequency and amplitude for three points on the main lobe of the DFT, namely the maximizer and its two neighbors. These points, derived for each signal length, represent the INPUT data used to train an ANN. The OUTPUT data consists of the frequency of the generated signal. Tests performed with generated signals with a different frequency and with data achieved from measurements confirm the validity of the method.

This is a preview of subscription content, log in via an institution to check access.

Access this chapter

Institutional subscriptions

D.J. Ewins, Modal Testing: Theory, Practice and Application , 2nd edn. (Wiley, London, 2000)

Google Scholar  

Theoretical basis of modal analysis. Am. J. Mech. Eng. 1 (7), 173–117 (2013)

L. Zhang, Y. Wang, S. Zhang, G. Hao, The fault diagnosis of machine based on modal analysis, in 2009 International Conference on Measuring Technology and Mechatronics Automation (IEEE Explore, Zhangjiajie, China, 2009), pp. 738–741

N.M.M. Maia, J.M.M. Silva, Modal analysis identification techniques. Phil. Trans. R. Soc. A 359 , 29–40 (2001)

Article   ADS   Google Scholar  

C. Wang, J. Wang, T. Zhang, Operational modal analysis for slow linear time-varying structures based on moving window second order blind identification. Signal. Process. 133 (C), 169–186 (2017)

A.A. Minda, C.I. Barbinita, G.R. Gillich, A review of interpolation methods used for frequency estimation. Rom. J. Acoust. Vib. 17 (1), 21–26 (2020)

Y.A. Al-Jawhar, K. Nidzam Ramli, M.A. Taher, N.S.M. Shah, L. Audah, M.S. Ahmed, Zero-padding techniques in OFDM systems. Int. J. Electr. Eng. Inf. 10 (4), 704–725 (2018)

M. Tufoi, G.R. Gillich, I.C. Mituletu, C. Hatiegan, An analysis of the dynamic behavior of rectangular plates from a damage detection approach. Rom. J. Acoust. Vib. 12 (2), 146–150 (2015)

I.C. Mituletu, G.R. Gillich, N.M.M. Maia, A method for an accurate estimation of natural frequencies using swept-sine acoustic excitation. Mech. Syst. Signal Process. 116 , 693–709 (2019)

Download references

Author information

Authors and affiliations.

Doctoral School of Engineering, Babes-Bolyai University, 400084, Cluj-Napoca, Romania

Daniela Georgiana Burtea, Rusalin-Lucian Paun, Nicoleta Gillich & Gilbert-Rainer Gillich

Department of Engineering Science, Babes-Bolyai University, 400084, Cluj-Napoca, Romania

Gilbert-Rainer Gillich

You can also search for this author in PubMed   Google Scholar

Corresponding author

Correspondence to Nicoleta Gillich .

Editor information

Editors and affiliations.

Department of Mechanics and Strength of Materials, Polytechnic University of Timişoara, Timişoara, Romania

Nicolae Herisanu

Vasile Marinca

Rights and permissions

Reprints and permissions

Copyright information

© 2024 The Author(s), under exclusive license to Springer Nature Switzerland AG

About this paper

Cite this paper.

Burtea, D.G., Paun, RL., Gillich, N., Gillich, GR. (2024). Experimental Modal Analysis Involving the Use of Artificial Intelligence to Accurately Evaluate the Natural Frequencies of Engineering Structures. In: Herisanu, N., Marinca, V. (eds) Acoustics and Vibration of Mechanical Structures—AVMS-2023. AVMS 2023. Springer Proceedings in Physics, vol 302. Springer, Cham. https://doi.org/10.1007/978-3-031-48087-4_35

Download citation

DOI : https://doi.org/10.1007/978-3-031-48087-4_35

Published : 11 April 2024

Publisher Name : Springer, Cham

Print ISBN : 978-3-031-48086-7

Online ISBN : 978-3-031-48087-4

eBook Packages : Physics and Astronomy Physics and Astronomy (R0)

Share this paper

Anyone you share the following link with will be able to read this content:

Sorry, a shareable link is not currently available for this article.

Provided by the Springer Nature SharedIt content-sharing initiative

• Publish with us

Policies and ethics

• Find a journal
• Track your research

Disclaimer » Advertising

• HealthyChildren.org

• Previous Article
• Next Article

Viral Testing for Febrile Infants Without Procalcitonin Measurement

• Split-Screen
• Article contents
• Figures & tables
• Supplementary Data
• Peer Review
• CME Quiz Close Quiz
• Open the PDF for in another window
• Get Permissions
• Cite Icon Cite
• Search Site

Caroline Wolek , Cassandra Poirier , Alexandra Yannopoulos , Nathan Kuppermann , Brett Burstein; Viral Testing for Febrile Infants Without Procalcitonin Measurement. Pediatrics June 2024; 153 (6): e2024065689. 10.1542/peds.2024-065689

Download citation file:

• Ris (Zotero)
• Reference Manager

Febrile infants ≤60 days old are at risk for bacteremia and bacterial meningitis, collectively termed invasive bacterial infections (IBIs). Recent guidelines from the American Academy of Pediatrics (AAP) recommend that when procalcitonin is unavailable, C-reactive protein (CRP), absolute neutrophil count (ANC), and maximum temperature may be used to identify low-risk infants. 1   Timely access to procalcitonin results is limited in many facilities, whereas rapid multiplex viral testing has become more readily available. 2   , 3   It remains unclear if and how viral test results should be incorporated for risk-stratification of febrile young infants. In this study, we examined the prevalence of IBI using the AAP-recommended combination of CRP, ANC, and temperature, among febrile young infants with and without laboratory-confirmed viral infections, to clarify the role of viral testing when procalcitonin is not available.

This was a secondary analysis of a prospectively collected quality improvement database of febrile infants ≤60 days old at an urban tertiary pediatric emergency department from January 2018 to December 2022. 4   This analysis included all previously healthy, term infants aged 8 to 60 days with rectal temperatures ≥38.0°C measured at home or emergency department triage, meeting AAP Febrile Infant Guidelines inclusion/exclusion criteria. 1   Standardized clinical and laboratory data were collected for all infants, including 30-day telephone follow-up to ascertain final IBI status. In April 2020, 22-plex respiratory pathogen polymerase chain reaction testing (BioFire Diagnostics LLC) replaced a 12-plex viral panel for all febrile infants ( Supplemental Table 3 ). Cerebrospinal fluid testing was performed at clinician discretion. Procalcitonin testing became available in March 2020, but results were not included in this analysis. Infants with CRP ≤20.0mg/L, ANC ≤5200/mm 3 , and maximum temperature ≤38.5°C were considered low risk for IBI. Final IBI classification followed AAP definitions. 1   Groups were compared with Fisher’s exact test (Stata v14.1, StataCorp). A 2-tailed P value <.05 was considered statistically significant. This study received approval from the institutional research ethics board.

There were 1346 infants included for analysis; 1104 (82.0%) were >21 days old, 25 (1.9%) had IBIs, and 836 (62.1%) had viruses detected ( Table 1 ). Using AAP-recommended thresholds, 644 (47.8%) infants met low-risk criteria; none had IBIs. All IBIs occurred among the 702 (52.2%) high-risk infants who had an IBI prevalence of 3.6% ( P < .001 versus low-risk infants; Table 2 ). Among high-risk infants, 289 (41.2%) were virus-negative and 413 (58.8%) were virus-positive. Virus-negative, high-risk infants were at highest risk of IBI (20 of 289; 6.9%), whereas high-risk infants with viral detection had the lowest risk of IBI (5 of 413; 1.2%). Five high-risk infants with IBIs had viral coinfections, 4 of whom had rhinovirus/enterovirus detected ( Supplemental Table 4 ).

Demographic Characteristics of Included Infants, n (%)

IQR, interquartile range; UTI, urinary tract infection.

Prevalence of IBI and Viral Status Among 1346 Febrile Infants Classified as High or Low Risk for IBI

CI, confidence interval.

Includes 156 infants with either rhinovirus (36 of 156; 12-plex panel) or rhinovirus/enterovirus (120 of 156; 22-plex panel) infections. One-sided 97.5% confidence interval.

P < .001 versus low risk.

Recent studies suggest that AAP-recommended thresholds of CRP, ANC, and temperature are accurate for ruling out IBIs, but lack specificity (9%–46%), 4   , 5   misclassifying most febrile infants as high risk. Further risk stratification could help mitigate unnecessary lumbar punctures, hospitalizations, and treatment of infants failing initial low-risk criteria. In this cohort of febrile infants ≤60 days undergoing multiplex viral testing, AAP-recommended thresholds of CRP, ANC, and temperature missed no cases of IBIs; however, most infants did not meet low-risk criteria. Viral status allowed further risk stratification of high-risk infants, and those with confirmed viral infections were at ∼1% risk of IBIs.

The presence of laboratory-confirmed viral infections is associated with lower risks of IBIs, 6   , 7   and affects clinician decision-making for febrile infants. 8   The AAP Febrile Infant Guideline highlights the need for studies clarifying the role of viral testing in managing febrile infants. However, there are limited data to inform how to safely and cost-effectively incorporate viral testing into risk stratification for IBI. 1   Findings from the current study suggest that viral testing may assist clinicians individualize management of high-risk infants when procalcitonin is not available.

This study has limitations. This was a single-center study and the results may not be generalizable to other settings. Only 25 infants had IBIs, although this number was similar to that used to derive clinical prediction rules. 9   With this number of IBIs, it was not possible to stratify risk and viral status by AAP age subgroups meaningfully. Importantly, the risk discrimination added by viral testing depends on the panel used and pathogens tested. The presence of rhinovirus may alter the risk of IBI less than other viruses. 10   In our study, rhinovirus and rhinovirus/enterovirus were considered virus-positive. Rhinovirus/enterovirus infections represented more than one-third of all viral infections among high-risk infants, and 4 of 5 infants with IBIs had rhinovirus/enterovirus detected. We evaluated the AAP-recommended thresholds of CRP, ANC, and temperature, not other cut point combinations. When using these inflammatory markers, targeted use of viral testing for high-risk infants could inform decision-making regarding invasive testing and disposition when procalcitonin is unavailable.

Ms Wolek assisted in data analysis and interpretation, and drafted and critically revised the manuscript; Dr Poirier assisted study conceptualization and design, data collection, analysis, and interpretation; Ms Yannopoulos assisted in data collection, analysis, and interpretation, and reviewed and critically revised the manuscript; Dr Kuppermann assisted in study conceptualization and design, data collection, analysis, and interpretation, reviewed and critically revised the manuscript, and secured funding for the parent study; Dr Burstein assisted in study conceptualization and design, data collection, analysis, and interpretation, drafted and critically revised the manuscript, and secured funding for the parent study; and all authors approved the final manuscript as submitted and agree to be accountable for all aspects of the work.

FUNDING: Dr Burstein is the recipient of a career award from the Quebec Health Research Fund. Dr Kuppermann is supported by the Bo Tomas Brofeldt endowed professorship from the University of California, Davis School of Medicine. The other authors received no additional funding.

CONFLICT OF INTEREST DISCLOSURES: The authors have indicated they have no conflicts of interest relevant to this article to disclose.

American Academy of Pediatrics

absolute neutrophil count

C-reactive protein

invasive bacterial infection

Supplementary data

Advertising Disclaimer »

Citing articles via

Email alerts.

Affiliations

• Editorial Board
• Editorial Policies
• Journal Blogs
• Pediatrics On Call
• Online ISSN 1098-4275
• Print ISSN 0031-4005
• Pediatrics Open Science
• Hospital Pediatrics
• Pediatrics in Review
• AAP Grand Rounds
• Latest News
• Pediatric Care Online
• Red Book Online
• Pediatric Patient Education
• AAP Toolkits
• AAP Pediatric Coding Newsletter

First 1,000 Days Knowledge Center

Institutions/librarians, group practices, licensing/permissions, integrations, advertising.

• Privacy Statement | Accessibility Statement | Terms of Use | Support Center | Contact Us
• © Copyright American Academy of Pediatrics

This Feature Is Available To Subscribers Only

Sign In or Create an Account

SYSTEMATIC REVIEW article

This article is part of the research topic.

Reviews in Gastroenterology 2023

Electrogastrography Measurement Systems and Analysis Methods Used in Clinical Practice and Research: Comprehensive Review Provisionally Accepted

• 1 VSB-Technical University of Ostrava, Czechia

The final, formatted version of the article will be published soon.

Electrogastrography (EGG) is a non-invasive method with high diagnostic potential for the prevention of gastroenterological pathologies in clinical practice. In this paper, a review of the measurement systems, procedures, and methods of analysis used in electrogastrography is presented. A critical review of historical and current literature is conducted, focusing on electrode placement, measurement apparatus, measurement procedures, and time-frequency domain methods of filtration and analysis of the non-invasively measured electrical activity of the stomach.As a result a total of 129 relevant articles with primary aim on experimental diet were reviewed in this study. Scopus, PubMed and Web of Science databases were used to search for articles in English language, according to the specific query and using PRISMA method. The research topic of electrogastrography has been continuously growing in popularity since the first measurement by professor Alvarez 100 years ago and there are many researchers and companies interested in EGG nowadays. Measurement apparatus and procedures are still being developed in both commercial and research settings. There are plenty variable electrode layouts, ranging from minimal numbers of electrodes for ambulatory measurements to very high numbers of electrodes for spatial measurements. Most authors used in their research anatomically approximated layout with 2 active electrodes in bipolar connection and commercial electrogastrograph with sampling rate of 2 or 4 Hz. Test subjects were usually healthy adults and diet was controlled. However, evaluation methods are being developed at a slower pace and usually the signals are classified only based on dominant frequency. The main review contributions include the overview of spectrum of measurement systems and procedures for electrogastrography developed by many authors, but a firm medical standard has not yet been defined. Therefore, it is not possible to use this method in clinical practice for objective diagnosis.

Keywords: electrogastrography, non-invasive method, Measurement systems, Electrode placement, Measurement apparatus, Signal processing

Received: 19 Jan 2024; Accepted: 03 Jun 2024.

Copyright: © 2024 Oczka, Augustynek, Penhaker and Kubicek. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY) . The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

* Correspondence: Dr. Jan Kubicek, VSB-Technical University of Ostrava, Ostrava, 708 33, Moravian-Silesian Region, Czechia

People also looked at