Authorea (Authorea)最新文献_第9页

Severe seasonal shifts in tropical insect ephemerality drive bat foraging effort 热带昆虫短暂性的严重季节性变化促使蝙蝠努力觅食

Authorea (Authorea) Pub Date : 2023-11-14 DOI: 10.22541/au.169997607.74880920/v1

Jenna Kohles, Rachel A Page, Martin Wikelski, Dina Dechmann

引用次数: 0

Examining Root System Variability in Soybean Using Imaging Technologies 利用成像技术研究大豆根系变异

Authorea (Authorea) Pub Date : 2023-11-14 DOI: 10.22541/essoar.170000395.52860395/v1

Sujata Bogati, Joshua Carpenter, Ellen Woods, Jinha Jung, Diane R Wang

引用次数: 0

Signatures of Dipolarizing Flux Bundles in the Nightside Auroral Zone 夜侧极光区双极化通量束的特征

Authorea (Authorea) Pub Date : 2023-11-14 DOI: 10.22541/essoar.170000365.56355118/v1

Mark J. Engebretson, Sean A. Gaffaney, Jesus A. Ochoa, Andrei Runov, James M. Weygand, Yukitoshi (Toshi) Nishimura, Michael D. Hartinger, Vyatcheslav A. Pilipenko, Mark B. Moldwin, Martin Connors, Ian Mann, Zhonghua Xu, Juan V Rodriguez

{"title":"Signatures of Dipolarizing Flux Bundles in the Nightside Auroral Zone","authors":"Mark J. Engebretson, Sean A. Gaffaney, Jesus A. Ochoa, Andrei Runov, James M. Weygand, Yukitoshi (Toshi) Nishimura, Michael D. Hartinger, Vyatcheslav A. Pilipenko, Mark B. Moldwin, Martin Connors, Ian Mann, Zhonghua Xu, Juan V Rodriguez","doi":"10.22541/essoar.170000365.56355118/v1","DOIUrl":"https://doi.org/10.22541/essoar.170000365.56355118/v1","url":null,"abstract":"Dipolarizing flux bundles (DFBs) have been suggested to transport energy and momentum from regions of reconnection in the magnetotail to the high latitude ionosphere, where they can generate localized ionospheric currents that can produce large nighttime geomagnetic disturbances (GMDs). In this study we identified DFBs observed in the midnight sector from ~7 to ~10 RE by THEMIS A, D, and E during days in 2015-2017 whose northern hemisphere magnetic footpoints mapped to regions near Hudson Bay, Canada, and have compared them to GMDs observed by ground magnetometers. We found six days during which one or more of these DFBs coincided within ± 3 min with ≥ 6 nT/s GMDs observed by latitudinally closely spaced ground-based magnetometers located near those footpoints. Spherical elementary current systems (SECS) maps and all-sky imager data provided further characterization of two events, showing short-lived localized intense upward currents, auroral intensifications and/or streamers, and vortical perturbations of a westward electrojet. On all but one of these days the coincident DFB – GMD pairs occurred during intervals of high-speed solar wind streams but low values of SYM/H. In some events, in which the DFBs were observed closer to Earth and with lower Earthward velocities, the GMDs occurred slightly earlier than the DFBs, suggesting that braking had begun before the time of the DFB observation. This study is the first to connect spacecraft observations of DFBs in the magnetotail to intense (>6 nT/s) GMDs on the ground, and the results suggest DFBs could be an important driver of GICs.","PeriodicalId":487619,"journal":{"name":"Authorea (Authorea)","volume":"22 4","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134953890","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

Wavelet Analysis for Automatic Detection of Pi-2 Pulsations during Substorm Onset Along the 210$^{circ}$ Magnetic Meridian 210$^{circ}$磁子午线亚暴开始时Pi-2脉动的小波分析自动检测

Authorea (Authorea) Pub Date : 2023-11-14 DOI: 10.22541/essoar.170000392.22424750/v1

stephen Owino Omondi, Akimasa Yoshikawa, Teiji Uozumi, Yuki Obana, Moe Hayashi, Ayman Mohamed Mahrous

{"title":"Wavelet Analysis for Automatic Detection of Pi-2 Pulsations during Substorm Onset Along the 210$^{circ}$ Magnetic Meridian","authors":"stephen Owino Omondi, Akimasa Yoshikawa, Teiji Uozumi, Yuki Obana, Moe Hayashi, Ayman Mohamed Mahrous","doi":"10.22541/essoar.170000392.22424750/v1","DOIUrl":"https://doi.org/10.22541/essoar.170000392.22424750/v1","url":null,"abstract":"Ground Pi-2 pulsations comprise superpositions of various modal components of shear and fast Alfven waves, field line resonance, and plasmaspheric resonances. These complex waveforms, hard to resolve with Fourier transforms are successfully characterized by wavelet techniques. Wavelet detection employs decomposition and reconstruction modes to characterize time-frequency components. Hence, suitable for the examination of the locality and complexity of natural signal patterns. The current study presents the automatic detection of Pi-2 pulsations using Daubechies and Morlet wavelet transforms. In the study, distinct Pi-2 events from CPMN stations along 210${^circ}$ magnetic meridian were detected. Global Pi-2 pulsations with harmonious H oscillations and discrete D bays in the sub-aurora zone suggest a common source with diverse tunneling paths. Scalograms of Pi-2 undulations of the frequency band of 6.7-22 mHz were observed despite different kinds of Pi-2s. Auroral Pi-2s were highly localized in local time with clear H and D bays, implying magnetospheric-ionospheric current couplings. Latitudinal and longitudinal Pi-2 propagations are exemplified by 180${^circ}$ phase-shift (polarization) in EWA and group delay in the mid-latitudes of the northern hemisphere. Overall, Pi-2 wave power from high to low latitudes declined with peak amplitudes of 15 nT to less than 1 nT, respectively. Finally, external influences from sea currents causing signal attenuation due to the station’s proximity to the sea were also identified. To conclude, the accuracy and efficiency of wavelet analysis with no computation hassle render it a valuable tool for the study of space events in the magnetospheric community.","PeriodicalId":487619,"journal":{"name":"Authorea (Authorea)","volume":"26 12","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134954193","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

Pathway study and systematic evaluation of microRNAs involved in anthracycline- induced cardiotoxicity in breast cancer patients 蒽环类药物引起乳腺癌患者心脏毒性的microrna通路研究和系统评价

Authorea (Authorea) Pub Date : 2023-11-14 DOI: 10.22541/essoar.170000336.60993943/v1

Xu Xiang

引用次数: 0

The generation of 150 km echoes through nonlinear wave mode coupling 通过非线性波模耦合产生150千米回波

Authorea (Authorea) Pub Date : 2023-11-14 DOI: 10.22541/essoar.170000016.66293056/v1

William J Longley

引用次数: 0

An unmet need for pharmacology: treatments for radiation induced gastrointestinal mucositis. 未被满足的药理学需求:放射性胃肠黏膜炎的治疗。

Authorea (Authorea) Pub Date : 2023-11-14 DOI: 10.22541/au.169995134.41042376/v1

Yan Zhou, Kun Li, David Adelson

引用次数: 0

Music in Pregnancy to Improve Maternal Stress Resilience in Favor of the Offspring: A Systematic Review 怀孕期间的音乐可以提高母亲对后代的压力恢复力:一项系统综述

Authorea (Authorea) Pub Date : 2023-11-14 DOI: 10.22541/au.169994769.97119684/v1

Johanna Maul, Susann Behnam, Pauline Wimberger, Birgit Arabin

{"title":"Music in Pregnancy to Improve Maternal Stress Resilience in Favor of the Offspring: A Systematic Review","authors":"Johanna Maul, Susann Behnam, Pauline Wimberger, Birgit Arabin","doi":"10.22541/au.169994769.97119684/v1","DOIUrl":"https://doi.org/10.22541/au.169994769.97119684/v1","url":null,"abstract":"Abstract Background : Maternal mental health influences the metabolism and growth of fetal brain structures affecting their skills up to adulthood. Objective: Main objective is whether music interventions improve modifiable maternal health outcomes. Search Strategy: Up to July 2023, randomized controlled trials (RCTs) investigating music during pregnancy were identified using MEDLINE, CENTRAL, WEB OF SCIENCE. Selection Criteria: Using COVIDENCE reviewers screened for RCTs with >3 interventions applying the Perceived Stress Scale (PSS), State-Trait-Anxiety Inventory (STAI), Edinburgh Postnatal Depression Scale (EPDS), or blood pressure (BP) as outcome measures. Data Collection and Analysis: The revised Cochrane risk-of-bias tool (RoB2) and the reversed Cohen’s d were applied to investigate the impact of target groups, frequency, type and selection of music programs. The review was registered via PROSPERO CRD42022299950. Main Results: From 251 records, 14 RCTs (16 intervention arms) and 2375 pregnancies were included. Music interventions varied from 3 to 84 active or passive music sessions per pregnancy or 10 to 60 minutes per day and significantly decreased PSS in 2/4, STAI in 8/9, EPDS in 3/4 and BP in 3/4 RCTs. RoB2 was high in 5/14, or “with concerns” in 9/14 studies. Stratifying the Cohen’s d in 14 interventions arms suggested a big effect in 234/469 mothers on BP, and in 244/489 mothers on maternal anxiety. Conclusion: The findings show the dretailed potential of music interventions on maternal BP, stress resilience or anxiety complementing our research on complex music interventions throughout pregnancy in times of pandemics, violent conflicts, or natural catastrophes. Funding: Clara Angela Foundation. Key words: Music in pregnancy, systematic review, maternal stress, anxiety, and depression.","PeriodicalId":487619,"journal":{"name":"Authorea (Authorea)","volume":"29 6","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134957434","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

Broad-scale seasonal climate tracking is a consequence, not a driver, of avian migratory connectivity 大规模的季节性气候追踪是鸟类迁徙连通性的结果，而不是驱动因素

Authorea (Authorea) Pub Date : 2023-11-14 DOI: 10.22541/au.169996551.18080998/v1

Marius Somveille, Christen Bossu, Matthew DeSaix, Kristen Ruegg

引用次数: 0

The Role of In Situ Diversification in Island Endemism: Adaptive Introgression in Scutellaria in Taiwan 就地多样化在岛屿特有中的作用:台湾黄芩的适应性渐渗

Authorea (Authorea) Pub Date : 2023-11-14 DOI: 10.22541/au.169996523.30850088/v1

Pei-Wei Sun, Jui-Tse Chang, Min-Xin Luo, Chien-Ti Chao, Fang Du, Pei-Chun Liao

{"title":"The Role of In Situ Diversification in Island Endemism: Adaptive Introgression in Scutellaria in Taiwan","authors":"Pei-Wei Sun, Jui-Tse Chang, Min-Xin Luo, Chien-Ti Chao, Fang Du, Pei-Chun Liao","doi":"10.22541/au.169996523.30850088/v1","DOIUrl":"https://doi.org/10.22541/au.169996523.30850088/v1","url":null,"abstract":"Island habitats are natural laboratories that offer unique opportunities to study speciation mechanisms. Recent work indicates that both anagenetic and cladogenetic speciation processes, driven by allopatric and sympatric modes, contribute to island species diversity. However, clear evidence of local adaptation of endemic plant species on islands requires in-depth studies, which are scarce. This study underscores the importance of local adaptation in maintaining species entity by examining how adaptive introgression, hybridization, and local adaptation contribute to genetic variation in island species. Specifically, multilocus genome scanning of 51 nuclear genes was used to investigate the evolutionary relationships of the Scutellaria species complex on Taiwan Island and assess the role of in situ diversification in generating high endemism and genetic diversity. Recurrent interspecies introgressions were detected by phylogenetic networks and ABBA-BABA-based analysis, suggesting ongoing or recent speciation processes. Approximate Bayesian computation identified hybrid speciation in S. taiwanensis and S. hsiehii, with evidence of hybridization between more than two parental species. Genotype-environment association studies revealed that the influence of climate, particularly precipitation- and temperature-related factors, contributed to adaptive genetic divergence between species. Additionally, adaptive introgressions related to environmental pressures that may have facilitated the colonization of new island habitats were identified. This research illustrates how hybridization, introgression, and adaptation shaped the evolutionary histories and divergence of this island-endemic plant species complex and sheds light on the multifaceted mechanisms of speciation on semi-isolated islands.","PeriodicalId":487619,"journal":{"name":"Authorea (Authorea)","volume":"49 43","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134902660","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