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A Precoding Real-Time Buffer Based Self-Healing Solution for 5G Networks

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Journal of Computer and Communications 2021年第6期9卷 1-23页

作者： Tamer Omar thomas Ketseoglou Omar Naffaa Asatur Marzvanyan connor Carr Department of Electrical and Computer Engineering California State Polytechnic University Pomona USA

In order to meet key requirements imposed by transitioning to a 5G network, new network management techniques must be employed in order to increase network reliability and efficiency. Most notably, it is important that a Self-Organizing Network (SON) is able to recover autonomously from network failure or congestion through Self-Healing procedures (i.e. autonomous detection, diagnosis, and correction). This paper aims to develop a self-healing algorithm that can effectively “heal” a 5G network by testing a proposed self-healing algorithm within a network simulator that adheres to current 5G standards. The simulator developed in this paper aims to model a network of small cells that can inherit one of multiple states (healthy, congested, and failing) to validate the effectiveness of a programmed self-healing algorithm in recovering a simulated network. Results show that the application of a self-healing in a network is able to resolve issues related to Quality of Service (QoS) and reduced network data rates in portions of a network that are in a partially congested or failing state.

关键词： Self-Healing MIMO-Beamforming Millimeter Wavelength Base Station Latency

Aqueous Geochemistry and Limnology of the Sleeper Pit Lake, Nevada, USA: Evidence for Long-Term Subaqueous Solute Generation in Mine Pit Lakes

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Journal of Geoscience and Environment Protection 2019年第3期7卷 64-81页

作者： connor P. Newman Tyler Cluff thomas Gray Geoff Beale Nevada Division of Environmental Protection Carson City NV USA Piteau Associates Reno NV USA Piteau Associates Shrewsbury UK

Predictive geochemical and limnologic modeling of pit lakes is an important aspect of modern mine-site permitting. One of the key assumptions of many predictive pit-lake models is that open-pit high walls and in-pit backfill become geochemically unreactive once submerged by the filling pit lake. Existing pit lakes provide useful data to test this assumption. The Sleeper pit lake (northwestern Nevada, USA) is approaching hydrologic equilibrium and contains good-quality water that generally meets regulatory requirements for pit lakes. Despite the overall stable geochemical composition, seasonal trends in the hypolimnion indicate the generation of dissolved metals associated with the ore deposit (e.g., Mn and Zn) and cyclical variations in pH. This study applies mass balance, analysis of subaqueous pyrite oxidation, and trends in solute concentrations to evaluate the potential causes of long-term solute generation in the hypolimnion of the Sleeper pit lake. Three separate conceptual models (subaqueous pyrite oxidation;redox reactions;and diffusion of solutes from a permanently stratified bottom layer) were tested against the high-quality dataset available for the pit lake. Evaluation of the monitoring dataset for the pit lake indicates that the Sleeper pit lake has variable limnologic behavior, wherein the lake is consistently stratified (meromictic) in some years, while it undergoes full mixing (holomixis) in other time periods. Comparison of the data with the three conceptual models illustrates that none of these models can be completely implicated as causing the seasonal geochemical variations in the bottom of the pit lake, but that a combination of the processes is likely partially responsible. Additional data collection including sediment cores and in-situ pore-water analysis would aid in understanding geochemical processes occurring over time.

关键词： Mine Pit Lakes Limnology Subaqueous Sulfide Oxidation Redox Reactions Meromixis

照片中的人与宇宙 2020格林尼治天文台摄影大赛

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科学世界 2021年第4期 98-109页

作者： [法国]Nicolas Lefaudeux(摄影) [美国]Alan Friedman(摄影) [德国]Stefan Liebermann(摄影) [法国]Alain Paillou(摄影) [澳大利亚]Peter Ward(摄影) [美国]connor Matherne(摄影) [德国]thomas Kast(摄影) 竹原谅贵徐煜华(翻译) 不详

英国格林尼治皇家天文台主办的天文摄影大赛已迎来第12个年头。本届大赛从全世界收到了超过5000件作品。让我们和天文摄影师藤井旭先生一同欣赏这些获奖作品,从中领略遥远的星云、美丽的星空以及临近天体的震撼景象。

关键词：格林尼治摄影大赛天文台摄影师获奖作品

Gastroenterologist perceptions of faecal microbiota transplantation

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World Journal of Gastroenterology 2015年第38期21卷 10907-10914页

作者： Sudarshan Paramsothy Alissa J Walsh thomas Borody Douglas Samuel Johan van den Bogaerde Rupert WL Leong Susan connor Watson Ng Hazel M Mitchell Nadeem O Kaakoush Michael A Kamm Gastroenterology and Hepatology Department St Vincent’s Hospital Centre for Digestive Diseases Gastroenterology and Hepatology Department Bankstown-Lidcombe Hospital Gastroenterology and Hepatology Department Nambour General Hospital Gastroenterology and Hepatology Department Liverpool Hospital University of New South Wales School of Biotechnology and Biomolecular Sciences Departments of Gastroenterology and Medicine St Vincent's Hospital and University of Melbourne

AIM: To explore gastroenterologist perceptions towards and experience with faecal microbiota transplantation(FMT).METHODS: A questionnaire survey consisting of 17 questions was created to assess gastroenterologists' attitude towards and experience with FMT. This was anonymously distributed in hard copy format amongst attendees at gastroenterology meetings in Australia between October 2013 and April 2014. Basic descriptive statistical analyses were performed.RESULTS: Fifty-two clinicians participated. Twenty one percent had previously referred patients for FMT,8% more than once. Ninety percent would refer patients with Clostridium difficile infection(CDI) for FMT if easily available,37% for ulcerative colitis,13% for Crohn's disease and 6% for irritable bowel syndrome. Six percent would not refer any indication,including recurrent CDI. Eighty-six percent would enroll patients in FMT clinical trials. Thirty-seven percent considered the optimal mode of FMT administration transcolonoscopic,17% nasoduodenal,13% enema and 8% oral capsule. The greatest concerns regarding FMT were: 42% lack of evidence,12% infection risk,10% non infectious adverse effects/lack of safety data,10% aesthetic,10% lack of efficacy,4% disease exacerbation,and 2% inappropriate use; 6% had no concerns. Seventy seven percent believed there is a lack of accessibility while 52% had an interest in learning how to provide FMT. Only 6% offered FMT at their institution.CONCLUSION: Despite general enthusiasm,most gastroenterologists have limited experience with,or access to,FMT. The greatest concerns were lack of supportive evidence and safety issues. However a significant proportion would refer indications other than CDI for FMT despite insufficient evidence. These data provide guidance on where education and training are required.

关键词： Perceptions Gastroenterologist Clostridium diffici

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固定导线的不同位点对漂浮传感器振动的影响

听力学及言语疾病杂志 2008年第2期16卷 138-140页

作者：佘万东 Jiang Dan Alec Fitzgerald O＇connor 南京大学医学院附属鼓楼医院耳鼻咽喉科南京210008 Auditory implant center Department of Otolaryngology--Head andNeck Surgery Guy＇s and St. Thomas＇ Hospitals London UK

目的探讨固定漂浮传感器(floating mass transducer,FMT)导线的不同位点对FMT振动的影响。方法固定距FMT分别为10mm、5mm和紧贴FMT导线时,应用激光多普勒(laser doppler vibration,LDV)观测声刺激强度为100和80dB SPL时FMT的振动幅值。... 详细信息

目的探讨固定漂浮传感器(floating mass transducer,FMT)导线的不同位点对FMT振动的影响。方法固定距FMT分别为10mm、5mm和紧贴FMT导线时,应用激光多普勒(laser doppler vibration,LDV)观测声刺激强度为100和80dB SPL时FMT的振动幅值。结果FMT在1、1.5kHz处振动幅值较小,向两侧振动幅值渐增大,0.25和8kHz处最大。固定距FMT10mm、5mm和紧贴FMT导线时,均能产生明显的振动,尽管夹持点紧贴FMT时,振动幅值略高于另外两点,但三者间差异无统计学意义。结论固定FMT导线的不同位点,FMT均能产生相似的振幅。

关键词：漂浮传感器激光多普勒

Non-destructive silkworm pupa gender classification with X-ray images using ensemble learning

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Artificial Intelligence in Agriculture 2022年第1期6卷 100-110页

作者： Sania thomas Jyothi thomas Department of Computer Science and Engineering Christ(Deemed to be University)BangaloreIndia

Sericulture is the process of cultivating silkworms for the production of silk.High-quality production of silk without mixing with low quality is a great challenge faced in the silk production centers.One of the possibilities to overcome this issue is by separating male and female cocoons before extracting silk fibers from the cocoons as male cocoon silk fibers are finer than females.This study proposes a method for the classification of male and female cocoons with the help of X-ray images without destructing the cocoon.The study used popular single hybrid varieties FC1 and FC2 mulberry silkworm cocoons.The shape features of the pupa are considered for the classification process and were obtained without cutting the cocoon.A novel point interpolation method is used for the computation of the width and height of the cocoon.Different dimensionality reduction methods are employed to enhance the performance of the model.The preprocessed features are fed to the powerful ensemble learning method AdaBoost and used logistic regression as the base learner.This model attained a mean accuracy of 96.3%for FC1 and FC2 in cross-validation and 95.3%in FC1 and 95.1%in FC2 for external validation.

关键词： Sericulture Gender classification Stratified k-fold cross-validation Machine learning AdaBoost

Magnetohydrostatic modeling of the solar atmosphere

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Science China(Technological Sciences) 2022年第8期65卷 1710-1726页

作者： ZHU XiaoShuai NEUKIRCH thomas WIEGELMANN thomas State Key Laboratory of Space Weather National Space Science CenterChinese Academy of SciencesBeijing 100190China National Astronomical Observatories Chinese Academy of SciencesBeijing 100101China School of Mathematics and Statistics University of St AndrewsSt Andrews KY169SSUK Max-Planck-Institut f¨ur Sonnensystemforschung G¨ottingen 37077Germany

Understanding structures and evolutions of the magnetic fields and plasma in multiple layers on the Sun is very important. A force-free magnetic field which is an accurate approximation of the solar corona due to the low plasma β has been widely studied and used to model the coronal magnetic structure. While the force-freeness assumption is well satisfied in the solar corona, the lower atmosphere is not force-free given the high plasma β. Therefore, a magnetohydrostatic(MHS) equilibrium which takes into account plasma forces, such as pressure gradient and gravitational force, is considered to be more appropriate to describe the lower atmosphere. This paper reviews both analytical and numerical extrapolation methods based on the MHS assumption for calculating the magnetic fields and plasma in the solar atmosphere from measured magnetograms.

关键词： magnetic field photosphere chromosphere corona

Daily activity rhythms, chronotypes, and risk-taking behavior in the signal crayfish

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Current Zoology 2022年第2期68卷 177-183页

作者： Valerio SBRAGAGLIA thomas BREITHAUPT Department of Marine Renewable Resources Marine Science Institute(ICM-CSIC)Passeig Maritim de la Barceloneta3708003 BarcelonaSpain Department of Biology and Ecology of Fishes Leibniz-lnstitute of Freshwater Ecology and Inland FisheriesMüggelseedamm 31012587 BerlinGermany Department of Biological and Marine Sciences University of HullCottingham RoadHull HU67RXUK

Consistent inter-individual differences in daily activity rhythms(i.e.,chronotypes)can have ecological consequences in determining access to food resources and avoidance of predators.The most common measure to characterize chronotypes in animals as well as humans is the onset of activity(i.e.,early or late chronotypes).However,daily activity rhythms may also differ in the relative amount of activity displayed at particular time periods.Moreover,chronotypes may also be linked to other consistent inter-individual differences in behavior(i.e.,personality),such as the propensity to take risks.Here,we used the signal crayfish Pacifastacus leniusculusto test the presence of chronotypes and risk-taking personality traits and a potential behavioral syndrome between these traits.We first exposed crayfish to 5 days of light-darkness to measure daily activity rhythms and then we applied a visual predator-simulating stimulus in 2 different contexts(neutral and food).Our results showed consistent(i.e.,across 5 days)inter-individual differences in the relative nocturnal activity displayed in the early and middle,but not in the late part of darkness hours.Moreover,while crayfish displayed inter-individual differences in risk-taking behavior,these were not found to be consistent across 2 contexts.Therefore,we were not able to formally test a behavioral syndrome between these 2 traits.In conclusion,our study provides the first evidence of chronotypes in the relative amount of activity displayed at particular time periods.This could be a valuable information for applied ecological aspects related to the signal crayfish,which is a major invasive species of freshwater ecosystems.

关键词： behavioral syndrome biological rhythms boldness feeding locomotor activity

Occurrence of an endangered grassland butterfly is mainly driven by habitat heterogeneity,food availability,and microclimate

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Insect Science 2022年第4期29卷 1211-1225页

作者： Gwydion Scherer thomas Fartmann Department of Biodiversity and Landscape Ecology University of OsnabrückOsnabrückGermany Institute of Biodiversity and Landscape Ecology(IBL) MünsterGermany

The Marsh Fritillary(Euphydryas aurinia)was once widespread in large parts of Central Europe.However,in the course of the last century,populations of the butterfly largely collapsed.Here,we surveyed patch and microhabitat occupancy and its drivers in one of the last vital populations in calcareous grasslands.Our study revealed that environmental conditions at the landscape and habitat level determined the occurrence of E.aurinia in a montane agricultural landscape with low land-use intensity.Patch occupancy increased with the cover of Devil's-bit Scabious(Succisa pratensis)grasslands in the surroundings of the patches,habitat heterogeneity and host-plant cover.Microhabitat occupancy was driven by a warm microclimate and high availability of host plants.In the well-connected landscape of nutrient-poor grasslands,patch occupancy of E.aurinia was driven by parameters defining a high habitat quality.Habitat heterogeneity very likely buffers E.aurinia populations against environmental stochasticity and,hence,enhances long-term viability.For the gregariously feeding caterpillars of E.aurinia,host-plant biomass is essential.Due to their more luxuriant growth,S.pratensis plants were clearly preferred,although the Glossy Scabious(Scabiosa lucida)was also widespread.Additionally,the growth of large Succisa plants was favored by soil humidity and grassland abandonment.To cope with the adverse macro-and mesoclimatic conditions of the study area,females of the butterfly selected host plants growing in extraordinarily warm microhabitats for oviposition.To secure long-term viability of E.aurinia populations,we recommend creating mosaics of traditionally managed grasslands and early stages of abandonment within the patches.

关键词： agricultural landscape calcarcous grassland hay meadow host-plant abundance land-use change traditional management