Pub Date : 2022-02-14DOI: 10.1088/2633-1357/ac54bf
T. Bagni, H. Haldi, D. Mauro, C. Senatore
We developed a graphical user interface (GUI) to analyse tomographic images of superconducting Nb3Sn wires designed for the next generation accelerator magnets. The Tomography Analysis Tool (TAT) relies on the k-means algorithm, an unsupervised machine learning technique which is widely used to partition images into separated clusters. The GUI is compatible with both Linux and Windows operating systems. The software reliability was tested by optical inspecting the tomographic images superimposed on the clustered image obtained by the k-means algorithm. TAT was proven to correctly segment the various components of the Nb3Sn superconducting wires with single pixel precision. Finally, this software can be a useful tool for the scientific community to segment and analyse quickly and reproducibly tomographic images.
{"title":"Tomography analysis tool: an application for image analysis based on unsupervised machine learning","authors":"T. Bagni, H. Haldi, D. Mauro, C. Senatore","doi":"10.1088/2633-1357/ac54bf","DOIUrl":"https://doi.org/10.1088/2633-1357/ac54bf","url":null,"abstract":"We developed a graphical user interface (GUI) to analyse tomographic images of superconducting Nb3Sn wires designed for the next generation accelerator magnets. The Tomography Analysis Tool (TAT) relies on the k-means algorithm, an unsupervised machine learning technique which is widely used to partition images into separated clusters. The GUI is compatible with both Linux and Windows operating systems. The software reliability was tested by optical inspecting the tomographic images superimposed on the clustered image obtained by the k-means algorithm. TAT was proven to correctly segment the various components of the Nb3Sn superconducting wires with single pixel precision. Finally, this software can be a useful tool for the scientific community to segment and analyse quickly and reproducibly tomographic images.","PeriodicalId":93771,"journal":{"name":"IOP SciNotes","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44344394","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-10-05DOI: 10.1088/2633-1357/ac27fd
Nakone Bello, Umar Aishetu, Aminu Abubakar Hussain
A calculating formula when q∈(−∞, 1] for the locations of the triangular points L 4,5 in the relativistic restricted three-body problem is proposed when the bigger primary is a source of radiation with a mass reduction factor q. As an application, we consider a dust grain in type II comet tail in Solar-Jupiter system with a mass reduction factor q∈(−1.2, 0.5). An investigation in this neighborhood reveals that the shifts due to the relativistic terms on the locations of a dust grain particle are very small with the shifts in ξ— coordinate smaller than those of η— coordinate. It is further observed that increasing negative values of q results in moving L 4,5 further away from the line joining the primaries and towards the smaller primary. Increasing positive values of q, however results in a shift of L 4,5 towards both the line joining both primaries and towards the smaller primary.
{"title":"Locations of L 4,5 of a dust grain type II comet tail in Solar-Jupiter system in the photogravitational relativistic R3BP","authors":"Nakone Bello, Umar Aishetu, Aminu Abubakar Hussain","doi":"10.1088/2633-1357/ac27fd","DOIUrl":"https://doi.org/10.1088/2633-1357/ac27fd","url":null,"abstract":"A calculating formula when q∈(−∞, 1] for the locations of the triangular points L 4,5 in the relativistic restricted three-body problem is proposed when the bigger primary is a source of radiation with a mass reduction factor q. As an application, we consider a dust grain in type II comet tail in Solar-Jupiter system with a mass reduction factor q∈(−1.2, 0.5). An investigation in this neighborhood reveals that the shifts due to the relativistic terms on the locations of a dust grain particle are very small with the shifts in ξ— coordinate smaller than those of η— coordinate. It is further observed that increasing negative values of q results in moving L 4,5 further away from the line joining the primaries and towards the smaller primary. Increasing positive values of q, however results in a shift of L 4,5 towards both the line joining both primaries and towards the smaller primary.","PeriodicalId":93771,"journal":{"name":"IOP SciNotes","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42170404","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-09-01DOI: 10.1088/2633-1357/ac25e8
H. Koslowski, C. Linsmeier
Low energy ion scattering is a technique to detect the energy of ions which are scattered from a surface. For noble gas ions, it is predominantly sensitive to the topmost surface layer due to strong neutralisation processes. Depending on the combination of projectile ion and target material, the scattering spectra can exhibit contributions resulting from multiple scattering processes in deeper layers when probing ions are re-ionised on the exiting trajectory. These events cause a pronounced continuum located toward lower scattering energies with respect to the direct scattering peak. In a previous work a semi-empirical formula has been given which allows fitting and derivation of quantitative information from the measured spectra [Nelson 1986 J. Vac Sci. Technol. A 4 1567-1569]. Based on the former work an improved formula is derived which has less numerical artefacts and is numerically more stable.
低能离子散射是一种检测从表面散射的离子能量的技术。对于稀有气体离子，由于强中和过程，它主要对最表层敏感。根据发射离子和靶材料的组合，当探测离子在出射轨迹上被再电离时，散射光谱可以显示出由更深层次的多重散射过程产生的贡献。这些事件造成了一个明显的连续体，位于较低的散射能量，相对于直接散射峰。在以前的工作中，给出了一个半经验公式，它允许从测量光谱中拟合和推导定量信息[Nelson 1986 . J. Vac Sci.]。抛光工艺。[4][1567-1569]。在原有工作的基础上，推导出了具有较少数值伪影和数值稳定性的改进公式。
{"title":"Derivation of an improved semi-empirical expression for the re-ionisation background in low energy ion scattering spectra","authors":"H. Koslowski, C. Linsmeier","doi":"10.1088/2633-1357/ac25e8","DOIUrl":"https://doi.org/10.1088/2633-1357/ac25e8","url":null,"abstract":"Low energy ion scattering is a technique to detect the energy of ions which are scattered from a surface. For noble gas ions, it is predominantly sensitive to the topmost surface layer due to strong neutralisation processes. Depending on the combination of projectile ion and target material, the scattering spectra can exhibit contributions resulting from multiple scattering processes in deeper layers when probing ions are re-ionised on the exiting trajectory. These events cause a pronounced continuum located toward lower scattering energies with respect to the direct scattering peak. In a previous work a semi-empirical formula has been given which allows fitting and derivation of quantitative information from the measured spectra [Nelson 1986 J. Vac Sci. Technol. A 4 1567-1569]. Based on the former work an improved formula is derived which has less numerical artefacts and is numerically more stable.","PeriodicalId":93771,"journal":{"name":"IOP SciNotes","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42183623","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-06-03DOI: 10.1088/2633-1357/abf634
Channegowda Manjunatha
A novel inorganic hydride material, hydrogen bismuth chromium oxide (HBi3(CrO4)O3), with 2D nano sheets and 1D nanorods were prepared for the first time using a simple, green, hazard free hydrothermal method. The X-ray diffraction (XRD) results confirms that the as-formed sample (HBi3(CrO4)O3) has monoclinic crystal system with a space group of P21/a. The field emission scanning electron microscope (FESEM) analysis clearly reveal that the new material contains large quantity of 2D nanosheets of thickness <10 nm and spread over >1000 nm and with small amounts of micro-rods of width in the range of 1 to 5 μm and lengths in the range of 40 to 100 μm. The EDS analysis confirms the presence of ‘Bi’, ‘Cr’, and ‘O’ and it further evidences the purity of the sample. The fourier transform infra-red (FT-IR) spectra evidences that the sample has Bi-H, Bi-O and Cr-O bonds as expected for HBi3(CrO4)O3. This material has a potential to find its place in hydrogen storage material, photo/electro catalysis, fuel cells, optoelectronics and rechargeable batteries, therefore it needs materials researcher attention immediately.
{"title":"Novel bismuth oxy hydride chromate (HBi3(CrO4)O3) nano-sheets/rods synthesized by one step one pot wet chemical method","authors":"Channegowda Manjunatha","doi":"10.1088/2633-1357/abf634","DOIUrl":"https://doi.org/10.1088/2633-1357/abf634","url":null,"abstract":"<p>A novel inorganic hydride material, hydrogen bismuth chromium oxide (HBi<sub>3</sub>(CrO<sub>4</sub>)O<sub>3</sub>), with 2D nano sheets and 1D nanorods were prepared for the first time using a simple, green, hazard free hydrothermal method. The X-ray diffraction (XRD) results confirms that the as-formed sample (HBi<sub>3</sub>(CrO<sub>4</sub>)O<sub>3</sub>) has monoclinic crystal system with a space group of P21/a. The field emission scanning electron microscope (FESEM) analysis clearly reveal that the new material contains large quantity of 2D nanosheets of thickness <10 nm and spread over >1000 nm and with small amounts of micro-rods of width in the range of 1 to 5 <i>μ</i>m and lengths in the range of 40 to 100 <i>μ</i>m. The EDS analysis confirms the presence of ‘Bi’, ‘Cr’, and ‘O’ and it further evidences the purity of the sample. The fourier transform infra-red (FT-IR) spectra evidences that the sample has Bi-H, Bi-O and Cr-O bonds as expected for HBi<sub>3</sub>(CrO<sub>4</sub>)O<sub>3</sub>. This material has a potential to find its place in hydrogen storage material, photo/electro catalysis, fuel cells, optoelectronics and rechargeable batteries, therefore it needs materials researcher attention immediately.</p>","PeriodicalId":93771,"journal":{"name":"IOP SciNotes","volume":"97 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138509401","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-05-24DOI: 10.1088/2633-1357/ac049b
John Lydon, Rebecca E. Ciez
Renewable electricity will likely play a substantial role in a decarbonized energy system, and there are well-known seasonal patterns to renewable electricity output. We can manage these seasonal fluctuations by overbuilding our electricity generation capacity, implementing seasonal storage, or managing our energy demands seasonally. If industrial processes are more integrated with the broader energy system, they could play a role in managing these seasonal patterns, as they do not directly serve life-sustaining energy demands, and their products may be stored and sold at a later date. Here, we combine GDP, manufacturing, and energy consumption data to look at how existing manufacturing facilities operate, focusing on the utilization of their operating capacity and how utilization correlates with state-level energy consumption. Of the 12 states with the largest manufacturing energy demand, we find that they use an average of 75%–81% of operating capacity between 2014–2018. In most of these states, there is a positive relationship between energy consumption and capacity utilization, and decreasing 10% of manufacturing capacity utilization could translate into energy savings that are relatively large when compared to electricity sales for the same time period, implying that seasonal ramping of industrial production could play a substantial role in adjusting to seasonal energy trends.
{"title":"Existing seasonal flexibility in US manufacturing energy use","authors":"John Lydon, Rebecca E. Ciez","doi":"10.1088/2633-1357/ac049b","DOIUrl":"https://doi.org/10.1088/2633-1357/ac049b","url":null,"abstract":"Renewable electricity will likely play a substantial role in a decarbonized energy system, and there are well-known seasonal patterns to renewable electricity output. We can manage these seasonal fluctuations by overbuilding our electricity generation capacity, implementing seasonal storage, or managing our energy demands seasonally. If industrial processes are more integrated with the broader energy system, they could play a role in managing these seasonal patterns, as they do not directly serve life-sustaining energy demands, and their products may be stored and sold at a later date. Here, we combine GDP, manufacturing, and energy consumption data to look at how existing manufacturing facilities operate, focusing on the utilization of their operating capacity and how utilization correlates with state-level energy consumption. Of the 12 states with the largest manufacturing energy demand, we find that they use an average of 75%–81% of operating capacity between 2014–2018. In most of these states, there is a positive relationship between energy consumption and capacity utilization, and decreasing 10% of manufacturing capacity utilization could translate into energy savings that are relatively large when compared to electricity sales for the same time period, implying that seasonal ramping of industrial production could play a substantial role in adjusting to seasonal energy trends.","PeriodicalId":93771,"journal":{"name":"IOP SciNotes","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44491883","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-05-24DOI: 10.1088/2633-1357/ac049a
Anju Rani, Ravibabu Mulaveesala
InfraRed Thermography (IRT) is one of the non-destructive testing and evaluation (NDT&E) approach widely used for testing and evaluation of wide verity of materials such as metals, semiconductors and composites. Among the widely used Thermal NDT&E (TNDT&E) approaches for better depth resolution and sensitivity for detection of defects located at different depths inside the test specimen recently proposed correlation based approach gained importance due to its enhanced defect detection capabilities. The present paper introduces a novel one-dimensional analytical solution for the frequency modulated excitation scheme under adiabatic boundary conditions for detection of flat bottom holes as defects in a mild steel sample. The performance of the Pulse Thermography (PT), Lock-in Thermography (LT) and Frequency Modulated Thermal Wave Imaging (FMTWI) methods are highlighted their defect detection capabilities have been compared by adopting the recently introduced correlation based post-processing approach. Finally, the proposed analytical method has been validated with the results obtained from the commercially available finite element based software.
{"title":"Pulse compression favorable frequency modulated thermal wave imaging for non-destructive testing and evaluation: an analytical study","authors":"Anju Rani, Ravibabu Mulaveesala","doi":"10.1088/2633-1357/ac049a","DOIUrl":"https://doi.org/10.1088/2633-1357/ac049a","url":null,"abstract":"InfraRed Thermography (IRT) is one of the non-destructive testing and evaluation (NDT&E) approach widely used for testing and evaluation of wide verity of materials such as metals, semiconductors and composites. Among the widely used Thermal NDT&E (TNDT&E) approaches for better depth resolution and sensitivity for detection of defects located at different depths inside the test specimen recently proposed correlation based approach gained importance due to its enhanced defect detection capabilities. The present paper introduces a novel one-dimensional analytical solution for the frequency modulated excitation scheme under adiabatic boundary conditions for detection of flat bottom holes as defects in a mild steel sample. The performance of the Pulse Thermography (PT), Lock-in Thermography (LT) and Frequency Modulated Thermal Wave Imaging (FMTWI) methods are highlighted their defect detection capabilities have been compared by adopting the recently introduced correlation based post-processing approach. Finally, the proposed analytical method has been validated with the results obtained from the commercially available finite element based software.","PeriodicalId":93771,"journal":{"name":"IOP SciNotes","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46447888","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-05-11DOI: 10.1088/2633-1357/ac1725
R. Garattini, P. Nicolini
The evaluation of Casimir energies in curved background spacetimes is an essential ingredient to study the stability of traversable wormholes. In practice one has to calculate the contribution of the transverse-traceless component of the metric perturbation on a curved spacetime background. This implies the study of an eigenvalue equation involving a modified form of the Lichnerowicz operator. For arbitrary background spacetimes, however, such an operator does not display transverse-traceless properties, a fact that impedes the determination of the eigenvalues. Against this background, we show that the problem can be circumvented. Casimir energies can be calculated by gauging the original form of the modified Lichnerowicz operator into a transverse-traceless one.
{"title":"On the Lichnerowicz operator in traversable wormhole spacetimes","authors":"R. Garattini, P. Nicolini","doi":"10.1088/2633-1357/ac1725","DOIUrl":"https://doi.org/10.1088/2633-1357/ac1725","url":null,"abstract":"The evaluation of Casimir energies in curved background spacetimes is an essential ingredient to study the stability of traversable wormholes. In practice one has to calculate the contribution of the transverse-traceless component of the metric perturbation on a curved spacetime background. This implies the study of an eigenvalue equation involving a modified form of the Lichnerowicz operator. For arbitrary background spacetimes, however, such an operator does not display transverse-traceless properties, a fact that impedes the determination of the eigenvalues. Against this background, we show that the problem can be circumvented. Casimir energies can be calculated by gauging the original form of the modified Lichnerowicz operator into a transverse-traceless one.","PeriodicalId":93771,"journal":{"name":"IOP SciNotes","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45268955","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-04-16DOI: 10.1088/2633-1357/ac0ac2
I. Fukuda, K. Moritsugu
Principal component analysis (PCA) defines a reduced space described by PC axes for a given multidimensional-data sequence to capture the variations of the data. In practice, we need multiple data sequences that accurately obey individual probability distributions and for a fair comparison of the sequences we need PC axes that are common for the multiple sequences but properly capture these multiple distributions. For these requirements, we present individual ergodic samplings for these sequences and provide special reweighting for recovering the target distributions.
{"title":"Analysis of multiple data sequences with different distributions: defining common principal component axes by ergodic sequence generation and multiple reweighting composition","authors":"I. Fukuda, K. Moritsugu","doi":"10.1088/2633-1357/ac0ac2","DOIUrl":"https://doi.org/10.1088/2633-1357/ac0ac2","url":null,"abstract":"Principal component analysis (PCA) defines a reduced space described by PC axes for a given multidimensional-data sequence to capture the variations of the data. In practice, we need multiple data sequences that accurately obey individual probability distributions and for a fair comparison of the sequences we need PC axes that are common for the multiple sequences but properly capture these multiple distributions. For these requirements, we present individual ergodic samplings for these sequences and provide special reweighting for recovering the target distributions.","PeriodicalId":93771,"journal":{"name":"IOP SciNotes","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44729375","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-03-29DOI: 10.1088/2633-1357/abf33f
S. Hughes, Sebastian Quintero Olaya
A technique based on Archimedes’ Principle is described for measuring the volume of small objects (0.5–5 cm3) less dense than water. The volume of 10 small red chillies was measured by pycnometry and an immersion Archimedes technique which involved suspending the chillies in water in a container placed on an electronic balance. A pycnometer, which uses helium gas is able to determine the internal solid volume of the chillies and water immersion the outer volume. The difference between the two volumes gives the volume of internal air cavities in the chillies. The pycnometer and immersion techniques were compared by measuring the volume of wax candles with volumes between 0.3 and 2.5 cm3. A Bland-Altman analysis revealed that the Archimedes volumes were lower than pycnometry volumes by 6.1±2.3% which needs further investigation. A combination of pycnometry and water immersion may be a useful tool for botanical studies.
{"title":"Using pycnometry and Archimedes’ principle to measure the gross and air cavity volume of fruit","authors":"S. Hughes, Sebastian Quintero Olaya","doi":"10.1088/2633-1357/abf33f","DOIUrl":"https://doi.org/10.1088/2633-1357/abf33f","url":null,"abstract":"A technique based on Archimedes’ Principle is described for measuring the volume of small objects (0.5–5 cm3) less dense than water. The volume of 10 small red chillies was measured by pycnometry and an immersion Archimedes technique which involved suspending the chillies in water in a container placed on an electronic balance. A pycnometer, which uses helium gas is able to determine the internal solid volume of the chillies and water immersion the outer volume. The difference between the two volumes gives the volume of internal air cavities in the chillies. The pycnometer and immersion techniques were compared by measuring the volume of wax candles with volumes between 0.3 and 2.5 cm3. A Bland-Altman analysis revealed that the Archimedes volumes were lower than pycnometry volumes by 6.1±2.3% which needs further investigation. A combination of pycnometry and water immersion may be a useful tool for botanical studies.","PeriodicalId":93771,"journal":{"name":"IOP SciNotes","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46490064","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-03-01DOI: 10.1088/2633-1357/abe6f1
N. Kojimahara, M. Matsushita, Yasuto Sato
The association between mobile phone or tablet use and children’s health remains unclear. The main aim of this study was to examine whether caregiver-rated health and children’s mental disorders were related to their mobile phone use. We conducted a multistage sampling Internet survey of 1535 caregivers living with children aged 0–14 years in Japan. Using this cross-sectional data, multiple regression models were used to test for relationships among factors related to mobile phone use, caregiver-rated child health, and mental disorders. Total mobile phone use time was related to age, number of siblings, availability of Wi-Fi at home, and the child’s ownership of a mobile phone. Age and availability of Wi-Fi at home were positively related to tablet use, but neither the number of siblings nor the child’s ownership of a tablet were related to tablet use. In addition, we examined that tablet use (Odds ratio 0.62, 95% CI 0.39–1.00) and Wi-Fi use (Odds ratio 0.66, 95% CI 0.47–0.93) were related to low caregiver-rated child health among preschool students. It was newly pointed out that tablet and Wi-Fi use were related to low caregiver-rated child health among preschool students. As young children are likely to be exposed to internet for the purpose of babysitting, this study suggested that parents should be aware of mental influence for tablets and Wi-Fi use.
{"title":"Association between mobile phone use in young children and caregiver-rated health","authors":"N. Kojimahara, M. Matsushita, Yasuto Sato","doi":"10.1088/2633-1357/abe6f1","DOIUrl":"https://doi.org/10.1088/2633-1357/abe6f1","url":null,"abstract":"The association between mobile phone or tablet use and children’s health remains unclear. The main aim of this study was to examine whether caregiver-rated health and children’s mental disorders were related to their mobile phone use. We conducted a multistage sampling Internet survey of 1535 caregivers living with children aged 0–14 years in Japan. Using this cross-sectional data, multiple regression models were used to test for relationships among factors related to mobile phone use, caregiver-rated child health, and mental disorders. Total mobile phone use time was related to age, number of siblings, availability of Wi-Fi at home, and the child’s ownership of a mobile phone. Age and availability of Wi-Fi at home were positively related to tablet use, but neither the number of siblings nor the child’s ownership of a tablet were related to tablet use. In addition, we examined that tablet use (Odds ratio 0.62, 95% CI 0.39–1.00) and Wi-Fi use (Odds ratio 0.66, 95% CI 0.47–0.93) were related to low caregiver-rated child health among preschool students. It was newly pointed out that tablet and Wi-Fi use were related to low caregiver-rated child health among preschool students. As young children are likely to be exposed to internet for the purpose of babysitting, this study suggested that parents should be aware of mental influence for tablets and Wi-Fi use.","PeriodicalId":93771,"journal":{"name":"IOP SciNotes","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42115667","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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