PROCEEDINGS OF THE 2ND PHYSICS AND MATERIALS SCIENCE INTERNATIONAL SYMPOSIUM (PhyMaS 2.0)最新文献

{"title":"An analysis of a long duration solar burst with radio flux and sunspot number","authors":"W. Ismail, Z. S. Hamidi, N. Shariff","doi":"10.1063/5.0058498","DOIUrl":"https://doi.org/10.1063/5.0058498","url":null,"abstract":"For around 50 years, a solar flare is among the activities of the Sun that has been evaluated and observed by scientists. The origin of the solar flare is from the sunspot associated with a solar burst. The solar burst can be break into 5 types. Long duration solar bursts have been investigated in this study. There are 15 selected dates that have been chosen from 2019 until 2020. Radio flux and sunspot numbers affiliated with long-duration solar bursts have been analyzed in this paper. As a result, the longest and the shortest solar burst that has been recorded is 535 minutes on 14/04/19 and 36 minutes on 21/03/19 respectively. The Sun is very important to be consistently observed because in rare cases, the flare is very strong and can affect the Earth’s magnetosphere.","PeriodicalId":279928,"journal":{"name":"PROCEEDINGS OF THE 2ND PHYSICS AND MATERIALS SCIENCE INTERNATIONAL SYMPOSIUM (PhyMaS 2.0)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123708744","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}

{"title":"Comparison two solar flare events due to geomagnetic storm and its effect to geomagnetism induced current level (GIC)","authors":"N. I. Johari, Z. S. Hamidi, N. Shariff","doi":"10.1063/5.0058767","DOIUrl":"https://doi.org/10.1063/5.0058767","url":null,"abstract":"We present the study of sequence of geomagnetic storm (GMS) and its relation with the two solar flare events on 20th April 2020 and 29th May 2020. The parameter such as solar wind, interplanetary magnetic field (IMF) and Kp index play an important roles and affect the GIC level and climate change. The space weather prediction about solar radio burst and geomagnetic storm can be only possible if we know the activity of the Sun. Solar activity and geomagnetic activity were observed during the time period of both events in order to know whether solar burst associated with the GMS or not. In study we found that solar burst did not depends on GMS however it depends on solar activity meanwhile geomagnetic storm occurred when the Kp index above 5. We also found that the strength of GMS are excellently correlated with solar wind, and IMF thus it support earlier result of investigators. Furthermore, there is no confirmation about how GMS does influence the GIC level. The data of these activities, can be taken from the space weather websites. We have also discussed the various results obtained in present investigation in view recent scenario of geomagnetic storm.","PeriodicalId":279928,"journal":{"name":"PROCEEDINGS OF THE 2ND PHYSICS AND MATERIALS SCIENCE INTERNATIONAL SYMPOSIUM (PhyMaS 2.0)","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128791941","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}

{"title":"Exploring photon energy variation in solar activity phenomena captured from Telok Kemang observatory via 3D isophote rendering","authors":"Amirul Hazim Kamarulzaman, N. A. M. Taib","doi":"10.1063/5.0058481","DOIUrl":"https://doi.org/10.1063/5.0058481","url":null,"abstract":"Space weather is mainly due to solar activity which possibly cause not only faulty to technological systems but also harms living organisms. The study of solar activities varies with few phenomena such as solar flare, prominence, filament, sunspot and coronal mass ejection (CME). By performing solar imaging, this study manages to interpret the 2D image into 3D isophote image, thus further analyzation could be done in order to learn more about solar activity. This research aimed to interpret and analyse certain solar activities that were captured using imaging camera from Telok Kemang Solar Observatory. The images were then been rendered via ImageJ software in order to get a 3D isophote image. The output image data were shown in “Spectrum LUT” and “Thermal LUT”. Few variables were changed depending on favourable output image. The manipulated variables were the “grid size”, “smoothing”, “perspective”, “lighting”, “scale” and “z-scale”. In deduction, the analysis of solar images through 3D isophote image would provide a better understanding towards the photon energy of the light’s wavelength in terms of possible temperature of the solar activity.","PeriodicalId":279928,"journal":{"name":"PROCEEDINGS OF THE 2ND PHYSICS AND MATERIALS SCIENCE INTERNATIONAL SYMPOSIUM (PhyMaS 2.0)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131425046","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}

{"title":"Crystal structure and magnetic properties of lithium orthophosphate LiMn0.9Cu0.1PO4","authors":"Z. Mohamed, C. Ling","doi":"10.1063/5.0058020","DOIUrl":"https://doi.org/10.1063/5.0058020","url":null,"abstract":"Lithium orthophosphates LiMn0.9Cu0.1PO4 were successfully synthesised using a solid-state reaction method and characterised by X-ray powder diffraction and magnetic susceptibility measurement. Structure refinements against powder diffraction data were conducted in the orthorhombic space group no. 62, that is, Pnma. Magnetic susceptibility measurements showed that LiMn0.9Cu0.1PO4 undergo long-range antiferromagnetic ordering and antiferromagnetic, AFM at low temperature. Cu2+ doped in Mn sites resulted in the Neel temperature, TN = 34 K.","PeriodicalId":279928,"journal":{"name":"PROCEEDINGS OF THE 2ND PHYSICS AND MATERIALS SCIENCE INTERNATIONAL SYMPOSIUM (PhyMaS 2.0)","volume":"589 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116312414","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}

{"title":"Effect of annealing temperature on the optical and structural properties of Er3+-doped 80SiO2-10ZrO2-10Al2O3 thin film","authors":"S. Supardan, Nurul Ain Abd Malek, S. A. Kamil","doi":"10.1063/5.0057765","DOIUrl":"https://doi.org/10.1063/5.0057765","url":null,"abstract":"The effect of annealing temperature on the optical and structural properties of Er3+-doped 80SiO2−10ZrO2− 10Al2O3 films fabricated on fused SiO2 glass by sol-gel-dip-coating are investigated. In this paper, the optical and structural properties were characterized by thin film analyzer, X-ray diffraction (XRD) and Fourier transform infrared (FTIR). From thin film analyzer, it showed that the film thickness decreased with the increment of annealing temperature while the refractive index exhibited the opposite trend. OH peak at the range of 3400 cm−1 to 3700 cm−1 which is obtained from FTIR spectra disappear for sample that were annealed at 800°C and 850°C due to absent of OH and water molecules. The XRD pattern shows a broad peak for all samples indicating the amorphous nature of the fabricated film. However, there is one crystalline peak detected at 2θ = 28.4° for sample 850° which is correspond to ZrO2.","PeriodicalId":279928,"journal":{"name":"PROCEEDINGS OF THE 2ND PHYSICS AND MATERIALS SCIENCE INTERNATIONAL SYMPOSIUM (PhyMaS 2.0)","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122253535","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}

{"title":"Effect of electron beam on the mechanical properties of jackfruit seed starch: Polyvinyl alcohol blend polymers","authors":"F. A. Lothfy, A. Ali, H. A. Rafaie, W. Nor, R. Baharin, R. Ramli, A. M. Noor","doi":"10.1063/5.0058594","DOIUrl":"https://doi.org/10.1063/5.0058594","url":null,"abstract":"The effect of the electron beam on the mechanical properties of fabricated jackfruit seed starch: polyvinyl alcohol (JSS:PVA) blend film has been investigated. The blend polymer was prepared with the addition of 0.1 M hydrochloric acid (HCl), and 0.1 M sodium hydroxide (NaOH). The blend compositions were cast by using the solution casting plate technique. With an increased PVA composition in the blend ration, the mechanical properties of the blend including tensile strength, strain and young modulus were improved. The FT-IR results indicated that by raising the PVA in the blend composition, the bonding structure of the blend increased as shown at the 3296 cm-1, 1639 cm-1, and 1039 cm-1 peak. The mechanical and structural properties of the blend sample improved by increasing the irradiated percentage dose rate.","PeriodicalId":279928,"journal":{"name":"PROCEEDINGS OF THE 2ND PHYSICS AND MATERIALS SCIENCE INTERNATIONAL SYMPOSIUM (PhyMaS 2.0)","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132572887","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}

{"title":"DFT+U calculation in determining structural and electronic properties of YBa2Cu3O7-δ","authors":"S. F. Saipuddin, A. Hashim, M. H. Samat, N. E. Suhaimi, M. Taib","doi":"10.1063/5.0058262","DOIUrl":"https://doi.org/10.1063/5.0058262","url":null,"abstract":"The paper investigates the effect of Hubbard U (DFT+U) addition on structural and electronic properties of YBa2Cu3O7-δ superconductor. The calculation applies first principles calculation within Generalized Gradient Approximation for Perdew-Burke-Erzenhof for solids (GGA-PBEsol) functional using Density Functional Theory. Energy convergence was found at 400 eV cut-off and 4×4×1 k-point sampling. The DFT+U correction was applied on Cu 3d states at the range of U = 2, 4, 6 and 8 eV where U=2 eV shows the largest band gap difference. Using the GGA-PBEsol+U method, the structural and electronic properties of YBa2Cu3O7-δ were investigated such as its lattice parameters, band structure, the density of states and atomic population.","PeriodicalId":279928,"journal":{"name":"PROCEEDINGS OF THE 2ND PHYSICS AND MATERIALS SCIENCE INTERNATIONAL SYMPOSIUM (PhyMaS 2.0)","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114266044","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}

{"title":"Synthesis of calcium-aluminium layered double hydroxide nanohybrid material: A review","authors":"N. A. Jamil, Farah Liyana Bohari, Sheikh Mohd Ghazali, N. Dzulkifli, A. Abdullah, N. A. Tajuddin","doi":"10.1063/5.0057788","DOIUrl":"https://doi.org/10.1063/5.0057788","url":null,"abstract":"This review reported the various synthesis method used for intercalation of nanohybrid materials which is Calcium-Aluminium Layered Double Hydroxide (Ca-Al LDH). The nanocomposites are well built multiphase-materials of one or more dissimilar phases of dimensional between less to 100 nm range repetitively. LDH has a significant and unique shape due to its structure is quite robust with a wide range of possible composites by positively charged brucite- like sheets of hydroxides intercalated by negatively charged anion in the hydrated interlayer regions mainly found in mineral materials. The method such co-precipitation, hydrothermal, and mechanochemical are widely used from previous study for intercalation of calcium and aluminium into multilayers of LDH. The samples are prepared for characterization by using Powdered X-Ray Diffraction (PXRD). Each method shows great results, but co-precipitation is the best and one of the latest methods used for the synthesis.","PeriodicalId":279928,"journal":{"name":"PROCEEDINGS OF THE 2ND PHYSICS AND MATERIALS SCIENCE INTERNATIONAL SYMPOSIUM (PhyMaS 2.0)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123724169","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}

{"title":"Effect of different fuels on physical, structural and photoluminescence properties of Al2O3:Cr3+ powder synthesized by solution combustion method","authors":"N. A. A. E. Halim, M. K. Yaakob, M. F. Othman, A. Hashim, S. A. Senawi, W. A. W. Razali","doi":"10.1063/5.0058592","DOIUrl":"https://doi.org/10.1063/5.0058592","url":null,"abstract":"The luminescence of Al2O3:Cr3+ is the foundation for advancement of modern laser technology. Preparation of Al2O3:Cr3+ materials through combustion method is known as simple, cost-effective and short-time consuming approach. The types of fuel use in this method has a significant effect on the combustion products. In our research, urea, glycine and sorbitol were used as a fuel in order to study their effect on the physical, structural and photoluminescence properties of Al2O3:Cr3+ powders. These powders were characterized by scanning electron microscope (SEM), energy dispersive x-ray (EDX) spectroscopy, x-ray diffraction (XRD) and photoluminescence (PL) spectroscopy. SEM micrograph of Al2O3:Cr3+ powders using urea and sorbitol fuels show the powders obtained are highly agglomerated slab-like particles with typical thickness 2-5 µm. Meanwhile, the powder prepared using glycine fuel is observed to be agglomerated particles with tiny porous morphology. EDX results are in good agreement with the original chemical composition of the elements. Based on XRD results, all produced samples contain α-Al2O3 phase (COD-ID: 9008081) crystalline structure. However, the sample synthesized using sorbitol and glycine show the existence of additional Al2O3 phase crystalline structure which are γ-Al2O3 cubic phase (COD-ID: 1541582) and θ-Al2O3 monoclinic phase (COD-ID: 2107302). The crystallite size was estimated using Scherer’s formula and found to be 40.97, 28.94 and 31.23 nm for urea, sorbitol and glycine respectively. To acquire better comparison, another method was used to calculate crystallite size which is Williamson-Hall (W-H) plots. Crystallite size was estimated to be 82.20, 47.45 and 49.53 nm for urea, sorbitol and glycine, respectively. PL of the sample that synthesized using urea as fuel shows higher intensity compared to sorbitol and glycine as fuel. The peak at 405 nm shows higher excitation intensity compared to peak at 557 nm which are better excitation for the Al2O3:Cr3+ powders. From photoluminescence spectra, all samples show sharp emission spectra at 694 nm and sample prepared using urea produce highest emission intensity. Moreover, the samples synthesized with urea fuel showed the formation of highly crystalline Al2O3:Cr3+ powder and fully formed α-Al2O3 phase. Thus, it can be concluded that the sample produced using urea as fuel have better luminescence properties compared to other samples.","PeriodicalId":279928,"journal":{"name":"PROCEEDINGS OF THE 2ND PHYSICS AND MATERIALS SCIENCE INTERNATIONAL SYMPOSIUM (PhyMaS 2.0)","volume":"72 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126331666","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}

{"title":"Synthesis and optical properties of borate glass co-doped erbium/vanadium","authors":"N. Zaini, S. N. Mohamed, Z. Mohamed","doi":"10.1063/5.0057938","DOIUrl":"https://doi.org/10.1063/5.0057938","url":null,"abstract":"The Borate glass with composition 57.5B2O3 - 20Na2O - 20CaO – 1.5V2O5 – 1Er2O3 was prepared by conventional melt quenching method. The amorphous nature of the glass was confirmed by the XRD method. UV-Vis absorption spectroscopy in the wavelength range 400 – 1600 nm was carried out. The UV – VIS – NIR absorption spectra reveal 8 bands which were located at 450, 490, 519, 540, 660, 780, 980, and 1550 nm. and corresponding to 4F5/2, 4F7/2, 2H11/2, 4S3/2, 4F9/2, 4I9/2, 4I11/2, and 4I13/2, respectively. In addition, from the UV-VIS-NIR absorption spectra it was revealed the values optical band gap, refractive index and Urbach energy are 2.66 eV, 0.26 eV, and 2.4952, respectively.","PeriodicalId":279928,"journal":{"name":"PROCEEDINGS OF THE 2ND PHYSICS AND MATERIALS SCIENCE INTERNATIONAL SYMPOSIUM (PhyMaS 2.0)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129249291","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}