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Design of a mobile RFI monitoring station for DSA-2000 candidate sites surveys DSA-2000候选站点调查移动RFI监测站的设计
2022 3rd URSI Atlantic and Asia Pacific Radio Science Meeting (AT-AP-RASC) Pub Date : 2022-05-29 DOI: 10.23919/AT-AP-RASC54737.2022.9814279
V. Prayag, G. Hellbourg, M. Virgin
{"title":"Design of a mobile RFI monitoring station for DSA-2000 candidate sites surveys","authors":"V. Prayag, G. Hellbourg, M. Virgin","doi":"10.23919/AT-AP-RASC54737.2022.9814279","DOIUrl":"https://doi.org/10.23919/AT-AP-RASC54737.2022.9814279","url":null,"abstract":"The DSA-2000 radio telescope is currently being designed to become the fastest and most sensitive astronomical survey instrument. An important factor in this design is the future Radio Frequency Interference (RFI) environment of the telescope. A careful site selection and RFI risks assessment are important to ensure that the specifications of the telescope are met. To this end, a mobile RFI survey station has been developed to provide an accurate picture of the RFI environment of a candidate telescope site. This paper presents this monitoring station and preliminary results captured at the Owens Valley Radio Observatory.","PeriodicalId":356067,"journal":{"name":"2022 3rd URSI Atlantic and Asia Pacific Radio Science Meeting (AT-AP-RASC)","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114229298","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
Evidence of sublimation in the vertical profiles of radar reflectivity and its impact on snowfall estimation at the ground at Mario Zucchelli Antarctic Station Mario Zucchelli南极站雷达反射率垂直剖面升华的证据及其对地面降雪量估算的影响
2022 3rd URSI Atlantic and Asia Pacific Radio Science Meeting (AT-AP-RASC) Pub Date : 2022-05-29 DOI: 10.23919/AT-AP-RASC54737.2022.9814266
A. Bracci, L. Baldini, N. Roberto, E. Adirosi, M. Montopoli, C. Scarchilli, P. Grigioni, V. Ciardini, V. Levizzani, F. Porcù
{"title":"Evidence of sublimation in the vertical profiles of radar reflectivity and its impact on snowfall estimation at the ground at Mario Zucchelli Antarctic Station","authors":"A. Bracci, L. Baldini, N. Roberto, E. Adirosi, M. Montopoli, C. Scarchilli, P. Grigioni, V. Ciardini, V. Levizzani, F. Porcù","doi":"10.23919/AT-AP-RASC54737.2022.9814266","DOIUrl":"https://doi.org/10.23919/AT-AP-RASC54737.2022.9814266","url":null,"abstract":"Snow is the main positive component of surface mass balance in Antarctica. Therefore, accurate snow measurements of snowfall play a crucial role in characterizing the Antarctic ice sheet's variability and its impact on the sea-level rise. The remote sensing of precipitation and in situ measurements are, in general, challenging tasks and even more difficult in an environment like Antarctica. Radar profilers are increasingly used in Antarctic research stations to highlight snowfall processes through vertical reflectivity profiles and improve the quantitative precipitation estimation, also exploiting the synergy with surface measurements. This work summarizes the field campaign experience at the Italian Antarctic station \"Mario Zucchelli,\" analyzing the vertical profiles of reflectivity collected by a Micro Rain Radar (MRR), set with a vertical resolution of 35 m and a temporal resolution of 1 min. Such an MRR set up allowed us to use a trustworthy range gate just 105 m above the ground, thus avoiding contamination of clutter. Factors influencing the behavior of vertical profiles are analyzed, emphasizing the sublimation process and its implications on surface snowfall estimation at the ground.","PeriodicalId":356067,"journal":{"name":"2022 3rd URSI Atlantic and Asia Pacific Radio Science Meeting (AT-AP-RASC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117051228","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
Microdosimetry in a realistic keratinocyte cell model at mmWave and HF frequencies 毫米波和高频下真实角化细胞模型的微剂量测定
2022 3rd URSI Atlantic and Asia Pacific Radio Science Meeting (AT-AP-RASC) Pub Date : 2022-05-29 DOI: 10.23919/AT-AP-RASC54737.2022.9814391
Zain Haider, Y. Drean, R. Sauleau, L. Caramazza, M. Liberti, M. Zhadobov
{"title":"Microdosimetry in a realistic keratinocyte cell model at mmWave and HF frequencies","authors":"Zain Haider, Y. Drean, R. Sauleau, L. Caramazza, M. Liberti, M. Zhadobov","doi":"10.23919/AT-AP-RASC54737.2022.9814391","DOIUrl":"https://doi.org/10.23919/AT-AP-RASC54737.2022.9814391","url":null,"abstract":"Wide spread of millimeter-wave (mmWave) and wireless power transfer (WPT) technologies opens new challenges in terms of characterization of bioelectromagnetic interactions. The objective of this study is to investigate quantitatively the induction of such electromagnetic radiation within cells at 6.78 MHz and 60 GHz respectively. A realistic model of the keratinocyte, which takes into account the complex morphologies and volume fraction of organelles, was developed. The finite element method (FEM) was used to solve the Laplace’s equation under quasi-static approximation. The results show that the power loss density (PLD) within the cellular and subcellular compartments increases with frequency due to diminished shielding effect of the membranes. At 60 GHz and 6.78 MHz, the average power loss density (PLDavg) within the cellular and subcellular organelles is about six and three orders of magnitude higher than that at 1 kHz. Also, in comparison to the background PLDavg within cytoplasm (CP), the intracellular traffic through the nuclear pores (Np) is submitted to three orders of magnitude higher exposure level at 6.78 MHz and 2.5 times higher exposure level at 60 GHz.","PeriodicalId":356067,"journal":{"name":"2022 3rd URSI Atlantic and Asia Pacific Radio Science Meeting (AT-AP-RASC)","volume":"87 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115883482","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
A Simulation Study on the Effect of Phase-shift of Temporal Interference Stimulation 时间干涉刺激相移效应的仿真研究
2022 3rd URSI Atlantic and Asia Pacific Radio Science Meeting (AT-AP-RASC) Pub Date : 2022-05-29 DOI: 10.23919/AT-AP-RASC54737.2022.9814361
Yukihiro Enomoto, S. Huang, Wenwei Yu
{"title":"A Simulation Study on the Effect of Phase-shift of Temporal Interference Stimulation","authors":"Yukihiro Enomoto, S. Huang, Wenwei Yu","doi":"10.23919/AT-AP-RASC54737.2022.9814361","DOIUrl":"https://doi.org/10.23919/AT-AP-RASC54737.2022.9814361","url":null,"abstract":"In recent years, stimulation of deep areas by temporal interference (TI) electric fields has attracted much attention. Previous studies have shown the feasibility of stimulating targeted deep areas mouse brain and nerve bundles for stimulation. However, the possibility to change stimulus focus without changing the electrode layout has not been investigated.In this study, we investigated whether the phase-shift of the TI could be a control parameter for the location of stimulus focus, using a 3D model with 2/3 muscle electrical property.The potential distribution was measured for different phase-shifting cases. The activating function was calculated and compared to confirm the presence or absence of local focuses.As a result, it was observed that sites with significant activating function change with a phase shift. Though all the sites appeared near electrodes, i.e., there were no such sites in the deeper part of the model away from the electrodes. This research is a fundamental step towards effective selective deep nerves from the skin surface.","PeriodicalId":356067,"journal":{"name":"2022 3rd URSI Atlantic and Asia Pacific Radio Science Meeting (AT-AP-RASC)","volume":"39 3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124693126","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
Analysis of the Surface Plasmon Resonances of a Graphene Disk Stack: A Guaranteed and Fast Convergence Method 石墨烯磁盘堆表面等离子体共振分析:一种保证快速收敛的方法
2022 3rd URSI Atlantic and Asia Pacific Radio Science Meeting (AT-AP-RASC) Pub Date : 2022-05-29 DOI: 10.23919/AT-AP-RASC54737.2022.9814253
M. Lucido
{"title":"Analysis of the Surface Plasmon Resonances of a Graphene Disk Stack: A Guaranteed and Fast Convergence Method","authors":"M. Lucido","doi":"10.23919/AT-AP-RASC54737.2022.9814253","DOIUrl":"https://doi.org/10.23919/AT-AP-RASC54737.2022.9814253","url":null,"abstract":"In this paper, the surface plasmon resonances of a graphene disk stack, excited by an impinging plane wave, are studied by means of the guaranteed and fast convergence Helmholtz-Galerkin technique. The surface plasmon resonance frequencies are individuated by the peaks of the absorption cross-section and the total scattering cross-section, which are expressed in closed form. It is shown that, for a graphene disk stack with a small distance between the disks compared to the disks radius, the plasmon mode resonance frequencies up-shift as the number of disks increases.","PeriodicalId":356067,"journal":{"name":"2022 3rd URSI Atlantic and Asia Pacific Radio Science Meeting (AT-AP-RASC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122054279","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
Characteristic Mode Analysis of SIR Coupled Dual Band Dipole Antenna SIR耦合双波段偶极子天线的特征模态分析
2022 3rd URSI Atlantic and Asia Pacific Radio Science Meeting (AT-AP-RASC) Pub Date : 2022-05-29 DOI: 10.23919/AT-AP-RASC54737.2022.9814195
Manoj Mani, Remsha Moolat, M. Pezholil
{"title":"Characteristic Mode Analysis of SIR Coupled Dual Band Dipole Antenna","authors":"Manoj Mani, Remsha Moolat, M. Pezholil","doi":"10.23919/AT-AP-RASC54737.2022.9814195","DOIUrl":"https://doi.org/10.23919/AT-AP-RASC54737.2022.9814195","url":null,"abstract":"Characteristic mode analysis of a stepped impedance resonator (SIR) coupled dual-band dipole antenna is presented in this paper. Characteristic mode theory is effectively used to understand the resonant mechanism of the antenna. The antenna prototype is realized on the double-sided FR4 substrate of dielectric constant 4.4 and loss tangent 0.025. The proposed dual-band antenna resonates at 2.45 GHz and 5.5 GHz with an impedance bandwidth of 90 MHz and 1.6 GHz, respectively.","PeriodicalId":356067,"journal":{"name":"2022 3rd URSI Atlantic and Asia Pacific Radio Science Meeting (AT-AP-RASC)","volume":"59 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123888028","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
Intelligent and QoE-aware Open Radio Access Networks 智能和qos感知开放无线接入网
2022 3rd URSI Atlantic and Asia Pacific Radio Science Meeting (AT-AP-RASC) Pub Date : 2022-05-29 DOI: 10.23919/AT-AP-RASC54737.2022.9814435
Georgios Kougioumtzidis, V. Poulkov, Z. Zaharis, P. Lazaridis
{"title":"Intelligent and QoE-aware Open Radio Access Networks","authors":"Georgios Kougioumtzidis, V. Poulkov, Z. Zaharis, P. Lazaridis","doi":"10.23919/AT-AP-RASC54737.2022.9814435","DOIUrl":"https://doi.org/10.23919/AT-AP-RASC54737.2022.9814435","url":null,"abstract":"The open radio access network (O-RAN) concept refers to the architectural design of next generation RAN that is built on the principles of openness and intelligence. This paper presents an overview of the concept of O-RAN, by analyzing its architecture and examining its main building blocks. Moreover, it highlights the significance of quality of experience (QoE) for the envisioned future wireless networks, and analyzes the importance of integrating QoE-awareness in O-RAN’s design. Furthermore, it provides an analysis of the methodology of embedding artificial intelligence models in O-RAN’s architecture with the form of xApps.","PeriodicalId":356067,"journal":{"name":"2022 3rd URSI Atlantic and Asia Pacific Radio Science Meeting (AT-AP-RASC)","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126218187","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 Frequency Scaling of Rain Attenuation 雨衰减的频率标度研究
2022 3rd URSI Atlantic and Asia Pacific Radio Science Meeting (AT-AP-RASC) Pub Date : 2022-05-29 DOI: 10.23919/AT-AP-RASC54737.2022.9814364
O. Fiser, M. Kovalchuk
{"title":"On Frequency Scaling of Rain Attenuation","authors":"O. Fiser, M. Kovalchuk","doi":"10.23919/AT-AP-RASC54737.2022.9814364","DOIUrl":"https://doi.org/10.23919/AT-AP-RASC54737.2022.9814364","url":null,"abstract":"In our paper we deal with the generalized method of frequency scaling. From the attenuation known at one frequency, we determine the rain rate by the inverse procedure of any rain attenuation prediction model, which we then use to estimate the rain attenuation on another frequency. We compare the results on one hand with exact values, on the other hand with the results after the ITU-R frequency scaling method. The method proposed by us seems to be more accurate at the level of instantaneous frequency scaling and also at the level of the attenuation distribution function.","PeriodicalId":356067,"journal":{"name":"2022 3rd URSI Atlantic and Asia Pacific Radio Science Meeting (AT-AP-RASC)","volume":"74 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126275715","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
Advancing Radio Diagnostics of Space Weather Plasma Processes 推进空间天气等离子体过程的无线电诊断
2022 3rd URSI Atlantic and Asia Pacific Radio Science Meeting (AT-AP-RASC) Pub Date : 2022-05-29 DOI: 10.23919/AT-AP-RASC54737.2022.9814225
M. Messerotti
{"title":"Advancing Radio Diagnostics of Space Weather Plasma Processes","authors":"M. Messerotti","doi":"10.23919/AT-AP-RASC54737.2022.9814225","DOIUrl":"https://doi.org/10.23919/AT-AP-RASC54737.2022.9814225","url":null,"abstract":"Space Weather perturbations are originated by a variety of plasma processes, whose signatures are observable in the radio spectrum. The interpretation of these signatures to infer the physics at the sources is a fundamental requirement in developing Space Weather science and operation models. Hence, the advancement both of radio observation techniques and radio emission and propagation modelling is a must. A step to achieve this goal cannot be separated from the availability of a collaborative approach for data and model sharing and reviewing.","PeriodicalId":356067,"journal":{"name":"2022 3rd URSI Atlantic and Asia Pacific Radio Science Meeting (AT-AP-RASC)","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126509680","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
Electromagnetic tracking in guided medical interventions 引导医疗干预中的电磁跟踪
2022 3rd URSI Atlantic and Asia Pacific Radio Science Meeting (AT-AP-RASC) Pub Date : 2022-05-29 DOI: 10.23919/AT-AP-RASC54737.2022.9814313
Herman Alexander Jaeger, Kilian O'Donoghue, P. Cantillon-Murphy
{"title":"Electromagnetic tracking in guided medical interventions","authors":"Herman Alexander Jaeger, Kilian O'Donoghue, P. Cantillon-Murphy","doi":"10.23919/AT-AP-RASC54737.2022.9814313","DOIUrl":"https://doi.org/10.23919/AT-AP-RASC54737.2022.9814313","url":null,"abstract":"Electromagnetic tracking is a navigation technology used in guided medical interventions. The technology is gaining popularity in the fields of robotic surgery, catheter navigation and human-machine interface design. Small magnetic sensors provide enable the position and orientation of a surgical instrument to be tracked in real-time without line of sight. This paper discusses how low frequency electromagnetic fields are used as a tracking medium to precisely estimate the pose of magnetic sensors. The quasi-static approach to magnetic field modelling is presented along with number of pose estimation methods. Advantages and disadvantages of each system type are also discussed.","PeriodicalId":356067,"journal":{"name":"2022 3rd URSI Atlantic and Asia Pacific Radio Science Meeting (AT-AP-RASC)","volume":"32 6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125707299","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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