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In-water handwriting in multi-medium using electrical impedance imaging 利用电阻抗成像技术在多介质中进行水中书写
IOP SciNotes Pub Date : 2020-07-21 DOI: 10.1088/2633-1357/ab9724
Chenning Wu, M. Soleimani
{"title":"In-water handwriting in multi-medium using electrical impedance imaging","authors":"Chenning Wu, M. Soleimani","doi":"10.1088/2633-1357/ab9724","DOIUrl":"https://doi.org/10.1088/2633-1357/ab9724","url":null,"abstract":"A novel approach to human–computer interaction, in water handwriting is presented in this work. The novel handwriting method is based on tomographic imaging of electrical resistivity changes. The new method allows the users to write inside of a water ball in a natural, unconstrained way. In-water handwriting suffers no friction and allows handwriting or drawing in a more relaxed way. This work shows how an electrical impedance tomography (EIT) system and sensor/phantom can be used to create a robust handwriting in water. It is well known that EIT has low special resolution but offers a very good functional imaging with high temporal resolution. The work shows an example of a good quality functional imaging aspect of the EIT in a novel human computer interface (HCI) application. Although it is almost impossible to produce images of letters or complex shapes using EIT sensor, it is totally possible to produce the same using many EIT frames. The system used in this study has a frame rate of 15 frames per second so the actual handwriting of letters and shapes can be done without noticing any delays. Analysis of image similarity between actual handwriting and the one follow the EIT scheme shows a good correlation.","PeriodicalId":93771,"journal":{"name":"IOP SciNotes","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45909099","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
Internuclear potentials from the Sky3D code 来自Sky3D代码的核间势
IOP SciNotes Pub Date : 2020-07-21 DOI: 10.1088/2633-1357/ab952a
Paul Stevenson
{"title":"Internuclear potentials from the Sky3D code","authors":"Paul Stevenson","doi":"10.1088/2633-1357/ab952a","DOIUrl":"https://doi.org/10.1088/2633-1357/ab952a","url":null,"abstract":"This note presents a minor alteration to, and subsequent use of, the Sky3D nuclear time-dependent Hartree–Fock code to calculate ion-ion potentials in the Frozen Hartree–Fock approximation. An example of 16O + 16O is presented.","PeriodicalId":93771,"journal":{"name":"IOP SciNotes","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43796629","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
Low-cost descriptors of electrostatic and electronic contributions to anion redox activity in batteries 低成本描述静电和电子对电池阴离子氧化还原活性的贡献
IOP SciNotes Pub Date : 2020-07-21 DOI: 10.1088/2633-1357/ab9750
D. Davies, B. Morgan, D. Scanlon, A. Walsh
{"title":"Low-cost descriptors of electrostatic and electronic contributions to anion redox activity in batteries","authors":"D. Davies, B. Morgan, D. Scanlon, A. Walsh","doi":"10.1088/2633-1357/ab9750","DOIUrl":"https://doi.org/10.1088/2633-1357/ab9750","url":null,"abstract":"Conventional battery cathodes are limited by the redox capacity of the transition metal components. For example, the delithiation of LiCoO2 involves the formal oxidation from Co(III) to Co(IV). Enhanced capacities can be achieved if the anion also contributes to reversible oxidation. The origins of redox activity in crystals are difficult to quantify from experimental measurements or first-principles materials modelling. We present practical procedures to describe the electrostatic (Madelung potential) and electronic (integrated density of states) contributions, which are applied to the LiMO2 and Li2MO3 (M = Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zr, Nb, Mo, Ru, Rh, Pd, Ag, Hf, Ta, W, Re, Os, Ir, Pt, Au) model systems. We discuss how such descriptors could be integrated in a materials design workflow.","PeriodicalId":93771,"journal":{"name":"IOP SciNotes","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"61193357","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: 4
Fabrication and characterization of the blend of Polyurethane (PU) and Phase Change Materials (PCM) for energy storage and release 聚氨酯(PU)与相变材料(PCM)储能与释放共混物的制备与表征
IOP SciNotes Pub Date : 2020-07-21 DOI: 10.1088/2633-1357/ab9b15
Asra Tariq, M. Shakir, Ayesha Afzal, Iqra Abdul Rashid, M. Iqbal, Ammar Rauf
{"title":"Fabrication and characterization of the blend of Polyurethane (PU) and Phase Change Materials (PCM) for energy storage and release","authors":"Asra Tariq, M. Shakir, Ayesha Afzal, Iqra Abdul Rashid, M. Iqbal, Ammar Rauf","doi":"10.1088/2633-1357/ab9b15","DOIUrl":"https://doi.org/10.1088/2633-1357/ab9b15","url":null,"abstract":"Utilizing thermal energy storage (TES) system having phase change material (PCM) in it is an effective technique for energy conservation and reduction in greenhouse gas (GHG) emission. Fatty acids have the highest energy storage capacity and easy to process in comparison to all other PCM. Eutectic mixture of palmitic acid (PA) and capric acid (CA) was prepared and thermal analysis was done to confirm its latent heat storage capacity for energy storage and release. This eutectic mixture of fatty acids was physically blended in PMMA to avoid leakage. Fatty acid blended PMMA (F-PMMA) was blended with polyurethane (PU) foam. 10% F-PMMA added as an additive in PU offered highest compressive strength with improved energy absorption.","PeriodicalId":93771,"journal":{"name":"IOP SciNotes","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1088/2633-1357/ab9b15","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42264935","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: 3
Experimental strategies to increase ammonia yield in plasma catalysis over LTA and BEA zeolites LTA和BEA沸石等离子体催化提高氨收率的实验策略
IOP SciNotes Pub Date : 2020-07-21 DOI: 10.1088/2633-1357/aba1f8
Fnu Gorky, Moises A. Carreon, M. Carreon
{"title":"Experimental strategies to increase ammonia yield in plasma catalysis over LTA and BEA zeolites","authors":"Fnu Gorky, Moises A. Carreon, M. Carreon","doi":"10.1088/2633-1357/aba1f8","DOIUrl":"https://doi.org/10.1088/2633-1357/aba1f8","url":null,"abstract":"Herein we demonstrate the synthesis of ammonia via atmospheric DBD plasma discharge over LTA and BEA zeolites. The presence of the zeolite in the DBD reactor promoted the ammonia formation at low temperature. The zeolites dielectric constant and pore size greatly influenced the ammonia yields. Ammonia yields of 5.31% for zeolite beta and 5.22% for zeolite 5A were observed, which are at least 4 times higher than the yield obtained in the absence of the zeolites.","PeriodicalId":93771,"journal":{"name":"IOP SciNotes","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1088/2633-1357/aba1f8","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48763539","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: 12
Electron pairing in the Hubbard model as a result of on-site repulsion fluctuations 哈伯德模型中的电子配对是现场排斥力波动的结果
IOP SciNotes Pub Date : 2020-07-13 DOI: 10.1088/2633-1357/abe4b9
I. N. Karnaukhov
{"title":"Electron pairing in the Hubbard model as a result of on-site repulsion fluctuations","authors":"I. N. Karnaukhov","doi":"10.1088/2633-1357/abe4b9","DOIUrl":"https://doi.org/10.1088/2633-1357/abe4b9","url":null,"abstract":"We focus our quantitative analysis on the stability of insulator state in the Hubbard model at half-filling. Taking into account macroscopic fluctuation of the on-site repulsion, we consider the possibility of realizing a steady state which is characterized by electron pairing. Fluctuation of the on-site repulsion leads to the formation of holes in the form of excited states. The electron liquid has two possibilities of relaxation in the state with bare on-site repulsion U: trivial, to the initial state, and nontrivial to state in which electrons polarize holes forming electron-hole pairs. A steady state is determined by minimum energy for given U and its fluctuation δU . The values U and δU , for which the states with electron pairing are stable, are calculated. The proposed pairing mechanism is to some extent similar to the formation of a long-range pairing correlation in an optically induced Hubbard chain [].","PeriodicalId":93771,"journal":{"name":"IOP SciNotes","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49268456","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
Cracking and stability of non-rotating relativistic spheres with anisotropic internal stresses 具有各向异性内应力的非旋转相对论球体的破裂与稳定性
IOP SciNotes Pub Date : 2020-06-28 DOI: 10.1088/2633-1357/aba1f4
B. S. Ratanpal
{"title":"Cracking and stability of non-rotating relativistic spheres with anisotropic internal stresses","authors":"B. S. Ratanpal","doi":"10.1088/2633-1357/aba1f4","DOIUrl":"https://doi.org/10.1088/2633-1357/aba1f4","url":null,"abstract":"The stability of static uncharged spheres with anisotropic internal stresses is studied in general relativity. It has been noticed that pressure anisotropy plays an important role for stability of stellar structure. It is shown that radial profile of the stress anisotropy can be considered to decide potentially stable/unstable regions. Finally, pontentially stable/unstable regions of two known models of relativistic star have been examined.","PeriodicalId":93771,"journal":{"name":"IOP SciNotes","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42250892","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: 3
On quantifying the topological charge in micromagnetics using a lattice-based approach 用基于晶格的方法量化微磁学中的拓扑电荷
IOP SciNotes Pub Date : 2020-06-23 DOI: 10.1088/2633-1357/abad0c
Joo-Von Kim, Jeroen Mulkers
{"title":"On quantifying the topological charge in micromagnetics using a lattice-based approach","authors":"Joo-Von Kim, Jeroen Mulkers","doi":"10.1088/2633-1357/abad0c","DOIUrl":"https://doi.org/10.1088/2633-1357/abad0c","url":null,"abstract":"An implementation of a lattice-based approach for computing the topological skyrmion charge is provided for the open source micromagnetics code mumax3. Its accuracy with respect to an existing method based on finite difference derivatives is compared for three different test cases. The lattice-based approach is found to be more robust for finite-temperature dynamics and for nucleation and annihilation processes in extended systems.","PeriodicalId":93771,"journal":{"name":"IOP SciNotes","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47686706","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: 13
Optimal modeling pattern of variables selection on analog complex using UVE-PLS regression 基于UVE-PLS回归的模拟复合体变量选择的最优建模模式
IOP SciNotes Pub Date : 2020-06-04 DOI: 10.1088/2633-1357/ab8d46
Qianqian Li, Yue Huang, Kuang-da Tian
{"title":"Optimal modeling pattern of variables selection on analog complex using UVE-PLS regression","authors":"Qianqian Li, Yue Huang, Kuang-da Tian","doi":"10.1088/2633-1357/ab8d46","DOIUrl":"https://doi.org/10.1088/2633-1357/ab8d46","url":null,"abstract":"This study aimed to determine the composition of chemical complex by partial least square (PLS) regression models combined with uninformative variable elimination (UVE). The near-infrared (NIR) spectra of the forty samples were determined and then UVE was used to compress full NIR spectra from 12011 redundant variables to dozens of variables. Finally, 54, 16, 27, 31 and 42 variables were selected by UVE for 2,2,4-Trimethylpentane, Heptane, Cyclohexane, Ethyl formate and Butyl acetate respectively. Selected variables were used as the inputs of PLS model for quantitative analysis which made the prediction of the model more robust and accurate compared with the conventional PLS.","PeriodicalId":93771,"journal":{"name":"IOP SciNotes","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48101088","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
Evaluation of water repellency in bentonite filled polypropylene composites via physical and mechanical methods 膨润土填充聚丙烯复合材料拒水性的物理力学评价
IOP SciNotes Pub Date : 2020-06-04 DOI: 10.1088/2633-1357/ab999e
Oyku Yildirimkaraman, U. H. Yildiz, A. Akar, Ümit Tayfun
{"title":"Evaluation of water repellency in bentonite filled polypropylene composites via physical and mechanical methods","authors":"Oyku Yildirimkaraman, U. H. Yildiz, A. Akar, Ümit Tayfun","doi":"10.1088/2633-1357/ab999e","DOIUrl":"https://doi.org/10.1088/2633-1357/ab999e","url":null,"abstract":"With the advent of polymeric materials having dimensional stability, outdoor applications for polymer composites are increasing expeditiously. The employment of durable material in wet environments is the most effective means of water repellency. Silane modification was applied to bentonite clay for the donation of hydrophobicity on its surface. Surface functionalities of powder surfaces were confirmed by FTIR-ATR spectroscopy and SEM techniques. Polypropylene composities involving pristine and modified bentonite powders were produced in bulk and film forms at three different loading ratios. Water permeability of bulk and film samples was evaluated via water absorption test. In addition to water uptake values, optical microscopy was utilized in order to visualize the structural deterioration of composite samples after water immersion. Mechanical behaviours of composite materials before and after water absorption test were reported in order to analyze the effect of water aging. Based on the findings, in-depth discussions were performed by comparison with basic models postulated regarding migration of water molecules into polymer structure.","PeriodicalId":93771,"journal":{"name":"IOP SciNotes","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1088/2633-1357/ab999e","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45688595","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
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