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Study of the duration of the solar flare of the 23 and 24 solar cycles 第23和24太阳周期的太阳耀斑持续时间的研究
IF 0.8
MOMENTO-Revista de Fisica Pub Date : 2023-01-02 DOI: 10.15446/mo.n66.104439
Imad Hussain
{"title":"Study of the duration of the solar flare of the 23 and 24 solar cycles","authors":"Imad Hussain","doi":"10.15446/mo.n66.104439","DOIUrl":"https://doi.org/10.15446/mo.n66.104439","url":null,"abstract":"Studying solar flares and their characteristics is significant for understanding the dynamics of the sun. In this work, a new view for studying the  duration time of solar flares is presented. Regarding the analysis of the duration time, one of the solar flares parameters is introduced for the solar cycles 23 and 24. This is done by ordering the duration time of solar flares into five groups of minutes (<30, 30-60, 60 90, 90-120, >120) and calculating the total annual duration time of solar flares for each group. The total annual duration time is also calculated for each class of solar flare classification (B, C, M, X). Their relationship with both F10.7 and Kp-index are also studied. We found that approximately 41% of solar flares occur within 6-12 minutes for both solar cycles. Additionally, the total average of their duration time is 19.1 and 19.6 minutes, respectively.Also, the average duration time of the ascending phase is less than the descending phase of both  solar cycles for all classes of solar flares, except for B-class, which is vice versa. The relationship between the duration time of solar  flares with F10.7 is strong. In contrast, the relationship with the Earth’s magnetic field is weak.","PeriodicalId":42463,"journal":{"name":"MOMENTO-Revista de Fisica","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2023-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48921820","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}
引用次数: 0
Exploring the use of raw honey as a fuel source for microbial fuel cells 探索利用生蜂蜜作为微生物燃料电池的燃料来源
IF 0.8
MOMENTO-Revista de Fisica Pub Date : 2023-01-02 DOI: 10.15446/mo.n66.102235
Matilda Kpeli, M. Donkor, R. Tamakloe
{"title":"Exploring the use of raw honey as a fuel source for microbial fuel cells","authors":"Matilda Kpeli, M. Donkor, R. Tamakloe","doi":"10.15446/mo.n66.102235","DOIUrl":"https://doi.org/10.15446/mo.n66.102235","url":null,"abstract":"Microbial fuel cell (MFC) technologies are making headway in developing and expanding renewable energy through the conversion of organic matter to electricity. Various substrates can be used in the MFCs technology to enable energy generation, either pure substances or complex mixtures of organic materials. This study aims to consider the feasibility of raw honey as a fuel for mediator-less double-chamber MFC. The cell voltage was monitored in mediator-less double-chamber H2O2 cathode  microbial fuel cell. The Mfensi clay partition and the raw honey were analyzed using FTIR-ATR. The results show the highest open-circuit voltage of 1414 mV with a maximum current density of 0.6540 A/m2 and a maximum power density of 247.0 W/m2. These results demonstrate that raw honey can be used for power generation in MFCs and for practical applications.","PeriodicalId":42463,"journal":{"name":"MOMENTO-Revista de Fisica","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2023-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41947345","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}
引用次数: 0
Quantum vacuum fluctuations in inorganic compound CdSe 无机化合物CdSe的量子真空涨落
IF 0.8
MOMENTO-Revista de Fisica Pub Date : 2023-01-02 DOI: 10.15446/mo.n66.103486
Luciano Naixement, C. Béssa
{"title":"Quantum vacuum fluctuations in inorganic compound CdSe","authors":"Luciano Naixement, C. Béssa","doi":"10.15446/mo.n66.103486","DOIUrl":"https://doi.org/10.15446/mo.n66.103486","url":null,"abstract":"In the present work, we study the quantum vacuum fluctuations at finite temperature in the propagation of light in nonlinear optical media. We present nonlinear materials, that have the second-order electrical susceptibility tensor, and the fluctuating effective refractive index caused by fluctuating vacuum electric fields. Likewise, we study the fluctuations of the vacuum, which led to the contributions of thermal and mixed fluctuations being associated with a faithful test function to perform the calculations, in contrast to the Lorentzian distribution. We show the contribution of thermal and mixed fluctuations to time-of-flight fluctuations compared to the contributions of vacuum fluctuations. The result reveals a numerical estimate performed on cadmium selenide (CdSe) suggesting that the effects of fluctuations can cause uncertainty in time of flight due  to quantum vacuum fluctuations in terms of thermal and mixed fluctuations.","PeriodicalId":42463,"journal":{"name":"MOMENTO-Revista de Fisica","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2023-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46028111","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}
引用次数: 0
Radiation dosimetry with a Triple-GEM detector 三重GEM探测器辐射剂量测定
IF 0.8
MOMENTO-Revista de Fisica Pub Date : 2023-01-02 DOI: 10.15446/mo.n66.104505
Andrea Velasquez, Héctor F. Castro
{"title":"Radiation dosimetry with a Triple-GEM detector","authors":"Andrea Velasquez, Héctor F. Castro","doi":"10.15446/mo.n66.104505","DOIUrl":"https://doi.org/10.15446/mo.n66.104505","url":null,"abstract":"We studied the properties of the gaseous detector triple-GEM (triple Gas Electron Multiplier) as a dosimeter with different ionizing radiation sources used in medical applications. The detector was calibrated in energy with an Iron-55 radioactive source. We measured doses of radiation from different radioactive sources as well as from a medical portable X-ray machine, and compared them to reference values. The detector presents a linear dependence between radiation intensity and measured dose. A calibration factor of 1.13x104 was found, independently of the radiation source. These results allow us to conclude that the triple-GEM detector has the potential to be used as a dosimeter in medical applications.","PeriodicalId":42463,"journal":{"name":"MOMENTO-Revista de Fisica","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2023-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42982622","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}
引用次数: 0
Nanociencia y nanotecnología en la educación actual: una propuesta interdisciplinaria emergente poscovid-19 当前教育中的纳米科学和纳米技术:covid-19后新兴的跨学科建议
IF 0.8
MOMENTO-Revista de Fisica Pub Date : 2023-01-02 DOI: 10.15446/mo.n66.102031
N. B. Pampa-Quispe, Julissa Torres-Acurio
{"title":"Nanociencia y nanotecnología en la educación actual: una propuesta interdisciplinaria emergente poscovid-19","authors":"N. B. Pampa-Quispe, Julissa Torres-Acurio","doi":"10.15446/mo.n66.102031","DOIUrl":"https://doi.org/10.15446/mo.n66.102031","url":null,"abstract":"Estudios recientes mencionan que la nanociencia & nanotecnología formarán parte de las tecnologías emergentes que se fortalecerán en este siglo XXI por su enorme potencial de enseñanza, innovación tecnológica e investigación científica. El objetivo del presente trabajo es proponer la importancia de la nanociencia y nanotecnología como ciencia interdisciplinaria emergente pos-COVID-19 en la educación actual. Se recopiló información científica de diferentes bases de datos sobre la nanociencia y nanotecnología y su contribución en la educación antes y durante la pandemia. Así mismo, se enfatizó en la enseñanza de la nanociencia y nanotecnología como interdisciplina y en cómo, con sus aplicaciones tecnológicas multidisciplinarias, se implementaría un nuevo paradigma en la enseñanza del conocimiento científico y la innovación tecnológica, que ha sido ampliamente empleada para enfrentar el COVID-19. De esta manera, su enseñanza generaría habilidades científicas en los estudiantes para discernir múltiples posibilidades de discusión sobre el papel de la educación actual, convirtiéndose en un portal para aprender, comprender y vincular la nanotecnología. La nanociencia y la nanotecnología ha sido ampliamente empleada para enfrentar el COVID-19 y surge así un debate más amplio sobre la necesidad de implementar métodos diversos en la enseñanza, asegurando el aprendizaje del estudiante y el desarrollo de contenido educativo que proporcionaría un contexto apropiado de investigación e innovación y aplicación en la educación. A manera de conclusión, se hace un llamado a las instituciones para implementar la enseñanza de la nanociencia y nanotecnología en la educación básica, fundamental y superior, como generadores de nuevas habilidades científicas en los estudiantes y la mejora en la formación del docente, debido a el papel que tomarla en la etapa del pos-COVID-19.","PeriodicalId":42463,"journal":{"name":"MOMENTO-Revista de Fisica","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2023-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48148733","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}
引用次数: 0
Importance of quantum entanglement 量子纠缠的重要性
IF 0.8
MOMENTO-Revista de Fisica Pub Date : 2023-01-02 DOI: 10.15446/mo.n66.106560
J. Mahecha-Gómez, H. Vinck-Posada
{"title":"Importance of quantum entanglement","authors":"J. Mahecha-Gómez, H. Vinck-Posada","doi":"10.15446/mo.n66.106560","DOIUrl":"https://doi.org/10.15446/mo.n66.106560","url":null,"abstract":"An electron has a binary intrinsic property (spin “up” and “down”) and can have binary shifts (move to the right or left). Its spin can be combination of these two, and can have moves that can be combinations of those two. It can also be formed four pairs (intrinsic property, motion): up-left, up-right, down-left, down right. Even combinations of these four possibilities, which is an example of quantum entanglement. Similarly, photons have a binary intrinsic property, polarization.\u0000John Clauser and Alain Aspect experimentally observed that photon pairs can be in quantum entangled states formed with their polarization states. The third 2022 Nobel laureate in physics, along with the above researchers, Anton Zeilinger, experimentally demonstrated that quantum entanglement is applicable in information and quantum communication. Such applications, along with the quantum computing, quantum metrology, quantum microscopy, and others technologies, are called the “second quantum revolution”.","PeriodicalId":42463,"journal":{"name":"MOMENTO-Revista de Fisica","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2023-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48357600","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}
引用次数: 0
DETERMINATION OF THE VISCOSITY TEMPERATURE COEFFICIENT (β) AND PSEUDOPLASTIC INDEX (n) OF POLY(LACTID ACID) (PLA) 聚乳酸粘温系数（β）和假弹性指数（n）的测定
IF 0.8
MOMENTO-Revista de Fisica Pub Date : 2022-07-05 DOI: 10.15446/mo.n65.102254
C. Luna, E. S. B. Ferreira, F. M. Sousa, E. P. Nascimento, E. Araújo, D. D. Souza, E. B. Bezerra, R. Wellen
{"title":"DETERMINATION OF THE VISCOSITY TEMPERATURE COEFFICIENT (β) AND PSEUDOPLASTIC INDEX (n) OF POLY(LACTID ACID) (PLA)","authors":"C. Luna, E. S. B. Ferreira, F. M. Sousa, E. P. Nascimento, E. Araújo, D. D. Souza, E. B. Bezerra, R. Wellen","doi":"10.15446/mo.n65.102254","DOIUrl":"https://doi.org/10.15446/mo.n65.102254","url":null,"abstract":"Poly(lactic acid) (PLA) is one of the most important ecological thermoplastics due to its good mechanical properties. In light of this, investigations related to the effects of PLA processing parameters are important as they affect the final product performance. This work aimed to determine the viscosity-temperature coefficient (β) and pseudoplastic index (n) of PLA and estimate its degradation rate during processing using an internal mixer. The viscosity coefficient was determined applying different processing temperatures at the same rotors rotation rate, which allowed estimating β = 0.048 ◦C−1. PLA’s pseudoplastic index (n) under the tested conditions suggested a value of approximately 0.71. PLA’s degradation rate was around 4% under rotor rate of 120 rpm and temperature of 190 ◦C.","PeriodicalId":42463,"journal":{"name":"MOMENTO-Revista de Fisica","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2022-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49370024","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}
引用次数: 2
A DENSITY FUNCTIONAL THEORY (DFT) STUDY ON SILICON DOPED CARBON NANOTUBE Si-CNT AS A CARRIER FOR BMSF-BENZ DRUG USED FOR OSTEOPOROSIS DISEASE 摘要用密度泛函理论研究了硅掺杂碳纳米管Si-CNT作为骨质疏松药物BMSF-BENZ的载体
IF 0.8
MOMENTO-Revista de Fisica Pub Date : 2022-07-05 DOI: 10.15446/mo.n65.99010
Z. Al-Sawaff, S. Senturk Dalgic, F. Kandemirli
{"title":"A DENSITY FUNCTIONAL THEORY (DFT) STUDY ON SILICON DOPED CARBON NANOTUBE Si-CNT AS A CARRIER FOR BMSF-BENZ DRUG USED FOR OSTEOPOROSIS DISEASE","authors":"Z. Al-Sawaff, S. Senturk Dalgic, F. Kandemirli","doi":"10.15446/mo.n65.99010","DOIUrl":"https://doi.org/10.15446/mo.n65.99010","url":null,"abstract":"This study aims to investigate the capability of Silicon-Doped Carbon Nanotube (Si-CNT) to detect and adsorb the BMSF-BENZ ((4-Bromo-7-methoxy-1-(2-methoxyethyl)-5-{[3-(methylsulfonyl)phenyl]methyl}-2-[4- (propane-2-))yl)phenyl]-1H-1,3-benzothiazole) molecular. For this purpose, we considered different configurations for adsorbing BMSF-BENZ drugs on the surface of the Si-CNT nanotube. All considered configurations are optimized using the density functional theory (DFT) at the 6-31G∗∗ basis set and B3LYP-B97D level of theory. Then from optimized structures, for each nanoparticle, we selected seven stable locations for the adsorption of BMSF-BENZ in (Br, N8, N9, N58, O35, O41 and S) active atoms on the surface of the selected nanoparticle. The quantum theory of atoms in molecules (QTAIM), reduced density gradient (RDG) analysis, and molecular orbital (MO) analysis were also established. The calculated results indicate that the distance between nanotube and drug from the N8 site is lower than from all other locations sites for all investigated complexes, and adsorption of BMSF-BENZ from the N8 site is more favorable for the Si-CNT nanotube. The adsorption energy, hardness, softness, and fermi energy results reveal that the interaction of BMSF-BENZ with Si-CNT is a promising adsorbent for this drug as Adsorption energy Eads of BMSF-BENZ/Si-CNT complexes are (-13.08, -43.50, -17.90, -31.29, -25.57, -16.56, and -28.05) kcal/mol in the gas phase. As well, the appropriate and spontaneous interaction between the BMSF-BENZ drug and Si-CNT nanoparticle was confirmed by investigating the quantum chemical molecular descriptors and solvation Gibbs free energies of all atoms.","PeriodicalId":42463,"journal":{"name":"MOMENTO-Revista de Fisica","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2022-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42717735","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}
引用次数: 1
RASPBERRY PI-BASED SENSOR NETWORK FOR MULTI-PURPOSE NONLINEAR MOTION DETECTION IN LABORATORIES USING MEMS 基于树莓皮的MEMS多功能非线性运动传感器网络
IF 0.8
MOMENTO-Revista de Fisica Pub Date : 2022-07-05 DOI: 10.15446/mo.n65.102641
Natarajan Shriethar, Narmadha Chandramohan, Chandramohan Rathinam
{"title":"RASPBERRY PI-BASED SENSOR NETWORK FOR MULTI-PURPOSE NONLINEAR MOTION DETECTION IN LABORATORIES USING MEMS","authors":"Natarajan Shriethar, Narmadha Chandramohan, Chandramohan Rathinam","doi":"10.15446/mo.n65.102641","DOIUrl":"https://doi.org/10.15446/mo.n65.102641","url":null,"abstract":"Detecting and measuring the nonlinear evolution of a classical system is a complex process. In this work, the nonlinear evolution of a lab-level system is measured using the Raspberry Pi-based MEMS sensor network system. The evolution and various results of nonlinear systems were compared theoretical and experimentally.","PeriodicalId":42463,"journal":{"name":"MOMENTO-Revista de Fisica","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2022-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48173076","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}
引用次数: 0
EFFECT OF THE DIRECTION OF AN EXTERNAL APPLIED MAGNETIC FIELD ON THE MICROMAGNETIC PROPERTIES OF Fe CUBOIDS 外加磁场方向对铁立方体微磁性质的影响
IF 0.8
MOMENTO-Revista de Fisica Pub Date : 2022-07-05 DOI: 10.15446/mo.n65.100454
Mauricio Galvis-Patiño, Johans Restrepo-Cárdenas
{"title":"EFFECT OF THE DIRECTION OF AN EXTERNAL APPLIED MAGNETIC FIELD ON THE MICROMAGNETIC PROPERTIES OF Fe CUBOIDS","authors":"Mauricio Galvis-Patiño, Johans Restrepo-Cárdenas","doi":"10.15446/mo.n65.100454","DOIUrl":"https://doi.org/10.15446/mo.n65.100454","url":null,"abstract":"We present the results of the study of the micromagnetic properties and the magnetization dynamics of a system of Fe cuboids with a square base of length L = 120 nm and thickness, t = 9 nm, under free boundary conditions as a function of the angle of an in-plane applied external magnetic field, for which we have used the Ubermag micromagnetic program that uses the OOMMF package and the finite difference method with a cell size, c = 3 nm. Hysteresis loops show that the coercive field (Hc) decreases with increasing azimuthal angle, from one easy-magnetizing axis to the other; in turn, the remanent magnetization (Mr) remains constant and magnetization diagrams indicate the presence of magnetic domains and walls in the (x, y) plane, accompanied by a magnetization component that points, both, outward and inward of the plane. This behavior is associated with the type of anisotropy and the aspect ratio of the cuboid. Finally, energy graphs show how the competition between the dipole (Ed), the exchange (Eex), anisotropy (EK), and Zeeman (EZ) energies occurs along the hysteresis loops.","PeriodicalId":42463,"journal":{"name":"MOMENTO-Revista de Fisica","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2022-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46571786","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}
引用次数: 0
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