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Vertical Displacement Measurement in a Slow-Moving Sinkhole Using BOTDA

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Photonic Sensors 2024年第1期14卷 23-39页

作者： Pascual sevilLANO Javier PRECIADO-GARBAYO Jorge sevil Francisco GUTIERREZ Juan JMARTiNEZ Sonia MARTiN-LOPEZ Miguel GONZALEZ-HERRAEZ Aragon Institute of Engineering Research(I3A) Universidad de ZaragozaZaragoza 50018Spain Electronic Enginering and Communicaton Dpartment EINAUniversidad de ZaragzaZaragza 50018Spain Aragon Photonics Labs. Zaragoza 50009Spain Department of Earth Sciences Universidad de ZaragozaZaragoza 50009Spain Department of Electronics Escuela Politecnica SuperiorUniversidad de AlcalaMadrid 28805Spain

The effectiveness of monitoring and early-warning systems for ground deformation phenomena,such as sinkholes,depends on their ability to accurately resolve the ongoing ground displacement and detect the subtle deformation preceding catastrophic *** sinkholes with a slow subsidence rate and diffuse edges pose a significant challenge for subsidence monitoring due to the low deformation rates and limited lateral strain *** this work,we satisfactorily illustrate the practicality of the Brillouin optical time domain analysis(BOTDA)to measure the spatial-temporal patterns of the vertical displacement in such challenging slow-moving sagging *** assess the performance of the approach,we compare the strain recorded by the distributed optical fiber sensor with the vertical displacement measured by high-precision *** results show a good spatial correlation with the ability to identify the maximum subsidence *** is also a good temporal correlation with the detection of an acceleration phase in the subsidence associated with a flood event.

关键词： Distributed fiber optic sensing(DFOS) vertical displacement measurement slow subsidence rate sinkhole hazard early-warning system

Chemical Effect Analyses of 3d Elements by Study of X-Ray Fluorescence Spectra

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光谱学与光谱分析 2018年第8期38卷 2630-2637页

作者： sevil(Porikli) DURDAGI Faculty of Arts and Sciences Department of Physics Erzincan University Erzincan 24030 Turkey

Spectra of KX-rays emitted from pure 3 dtransition metals and their oxide and sulfate compounds were measured using a single crystal wavelength dispersive X-ray spectroscopy(WDXRF).The measurements were performed using a ZSX-100 esequential spectrometer equipped with an RhX-ray tube *** accurate analytical representation of each line was obtained by a fit to a Lorentz *** spectra were analyzed in order to examine the KX-ray peak parameters such as asymmetry index,peak energy and relative intensity *** energy shifts and relative intensities weredetermined tobetter understand the chemical effect.

关键词： Asymmetry index Relative intensity ratio Chemical effect Wavelength dispersive X-ray spectroscopy(WDXRF)

Prevalence of meeting 24-Hour Movement Guidelines from pre-school to adolescence: A systematic review and meta-analysis including 387,437 participants and 23 countries

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Journal of Sport and Health Science 2022年第4期11卷 427-437页

作者： Miguel Angel Tapia-Serrano Javier sevil-Serrano Pedro Antonio Sanchez-Miguel Jose Francisco Lopez-Gil Mark STremblay Antonio Garcıa-Hermoso Department of Didactics of Musical Plastic and Body ExpressionFaculty of Teaching TrainingUniversity of ExtremaduraAvenida de la UniversidadS/NCaceres 10071Spain Department of Physical Activity and Sport Faculty of Sport ScienceUniversity of Murcia(UM)San Javier 30720Spain Healthy Active Living and Obesity Research Group Children’s Hospital of Eastern Ontario(CHEO)Research InstituteOttawaON K1H 8L1Canada Navarrabiomed Public University of Navarra(UPNA)Health Research Institute of Navarra(IdiSNA)Navarra Hospital Complex(CHN)Pamplona 310008Spaia

Background:Meeting the 24-Hour Movement Guidelines(physical activity,screen time,and sleep duration) has been associated with positive health ***,there are no previous meta-analyses that have examined the overall adherence to the 24-Hour Movement Guidelines from pre-school to adolescence across the ***,the main purpose of this systematic review and meta-analysis was to examine the overall(non)adherence to the 24-Hour Movement Guidelines among preschoolers,children,and adolescents ***:Four electronic databases(MEDLINE,Scopus,Web of Science,and Cochrane Database of Systematic Reviews) were searched for quantitative studies published in Spanish and English between January 2016 and May *** that were conducted with apparently healthy participants and reported the overall(non)adherence to the 24-Hour Movement Guidelines in preschoolers and/or children and/or adolescents were ***:Sixty-three studies comprising 387,437 individuals(51% girls) aged 3-18 years from 23 countries were ***,7.12%(95%confidence interval(95%CI):6.45%-7.78%) of youth met all three 24-Hour Movement Guidelines,and 19.21%(95%CI:16.73%-21.69%)met none of the 3 *** sex,adherence to all recommendations was significantly lower in girls(3.75%,95%CI:3.23%-4.27%) than in boys(6.89%,95%CI:5.89%-7.89%)(p et any of the *** America was the region with the lowest adherence(all:2.93%;none:3

关键词： Exercise Lifestyle Movement behaviors Sedentary behaviors Youth

Problems of Lifts in Symplectic Geometry

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Chinese Annals of Mathematics,Series B 2019年第3期40卷 321-330页

作者： Arif SALIMOV Manouchehr BEHBOUDI ASL sevil KAZIMOVA Department of Algebra and Geometry Baku State University Department of Mathematics Salmas Branch Islamic Azad University

Let(M,ω)be a symplectic *** this paper,the authors consider the notions of musical(bemolle and diesis)isomorphisms ω~b:T M→T~*M and ω~?:T~*M→TM between tangent and cotangent *** authors prove that the complete lifts of symplectic vector field to tangent and cotangent bundles is ω~*** consequence of analyze of connections between the complete lift ~cω_(T M )of symplectic 2-form ω to tangent bundle and the natural symplectic 2-form dp on cotangent bundle,the authors proved that dp is a pullback o f^cω_(TM)by ω~?.Also,the authors investigate the complete lift ~cφ_T~*_M )of almost complex structure φ to cotangent bundle and prove that it is a transform by ω~?of complete lift^cφ_(T M )to tangent bundle if the triple(M,ω,φ)is an almost holomorphic *** transform of complete lifts of vector-valued 2-form is also studied.

关键词： Symplectic manifold Tangent bundle Cotangent bundle Transform of tensor fields Pullback Pure tensor Holomorphic manifold

Comparison of phenolic components and biological activities of two Centaurea *** by three extraction techniques

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Asian Pacific Journal of Tropical Medicine 2017年第6期10卷 669-676页

作者： sevil Albayrak Bayram Atasagun Ahmet Aksoy Erciyes University Science FacultyDepartment of Biology38039 KayseriTurkey Akdeniz University Science FacultyDepartment of Biology07058 AntalyaTurkey

Objective: The present study aimed to compare the polyphenol content, total phenolic, total flavonoid, antioxidant and antimicrobial activity of the extracts obtained from Centaurea amaena Boiss. & Balansa and Centaurea aksoyi Hamzao?lu & Budak. Methods: Both species were subjected to maceration, Soxhlet and ultrasonication extractions with methanol in order to macerated(ME), Soxhlet(SE) and ultrasonicated(UE) extracts. Their phenolic profiles were qualitatively examined by LC-MS. Their antioxidant activities were determined by phosphomolybdenum, β-carotene bleaching and DPPH assays. Agar diffusion and broth dilution methods were carried out to find the antimicrobial activity of these extracts against fifteen microorganisms. Results: Quercetin, quercetin-3-β-D-glucoside and protocatechuic acid were the main components of the both extracts obtained by Soxhlet extraction. The highest phenolic and flavonoid contents were found in the UE for both species. All the extracts exhibited good total antioxidant and DPPH radical scavenging activity. UE obtained from C. amaena showed the highest antioxidant activity with the highest phenolic and flavonoid contents. The antibacterial activity of UE obtained from C. amaena was better than other extracts and antibacterial activity of C. amaena was also better than C. aksoyi. Discussion: This study confirms that ultrasonic extraction may be an ideal, simple and rapid method to obtain polyphenol-rich extracts have antioxidant as well as antibacterial activity from both Centaureaspecies especially from C. amaena.

关键词： Centaurea aksoyi Centaurea amaena LC-MS Antioxidant activity Antimicrobial activity

Biological activities of Wiedemannia multifida(Linnaeus) Bentham and Wiedemannnia orientalis Fisch.& Mey.

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Asian Pacific Journal of Tropical Biomedicine 2013年第3期3卷 196-201页

作者： sevil Albayrak Ahmet Aksoy Department of Biology Science FacultyErciyes University

Objective:To evaluate total phenolic,antioxidant and antimicrobial activities of methanolic extracts of the Wiedemannia multifida(***)and Wiedemannnia orientalis(***).Methods:Phosmomolybdenum assay,DPPH radical scavenging activity andβ-carotent-linoleate bleaching were used to evaluate the antioxidant ***:The total phenolics were found to be(22.45±0.60)and(9.53±0.00)mg gallic acid equivalents(GAE)/g in *** and *** extracts,*** predominant phenolic compounds identified by HPLC-DAD in the both extracts were rutin+ellagic acid and *** antioxidant capacity and DPPH radical scavenging activity of *** were higher than ***β-carotene-linoleic acid system,both extracts exhibited strong inhibition against linoleic acid *** activity was assessed by the agar diffusion method against fifteen *** extracts exhibited remarkable antibacterial ***:The present study suggests that methanolic extracts of *** and *** could be a good source of antioxidant and antimicrobial agents in foods,pharmaceuticals preparations.

关键词： Wiedemannia Antimicrobial activity Antioxidant activity Phenolic

Outcomes of early physiotherapy in patients with cerebral aneurysms treated by surgical clipping or endovascular embolization

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Neural Regeneration Research 2012年第24期7卷 1900-1905页

作者： Arzu Guclu-Gunduz sevil Bilgin Nezire Kse Hakan Oruckaptan Department of Physiotherapy and Rehabilitation Faculty of Health SciencesGazi UniversityAnkaraTurkey Department of Physiotherapy and Rehabilitation Faculty of Health SciencesHacettepe UniversityAnkaraTurkey Department of Neurosurgery Faculty of MedicineHacettepe UniversityAnkaraTurkey

Early physiotherapy was given to 124 patients with ruptured or unruptured cerebral aneurysms who were treated by surgical clipping or endovascular *** were divided into four groups according to their Hunt and Hess grade at admission and aneurysm treatment modality： Group 1,Hunt and Hess grade≤II and surgical clipping;Group 2,Hunt and Hess grade≤II and endovascular embolization;Group 3,Hunt and Hess grade≥III and surgical clipping;Group 4,Hunt and Hess grade≥III and endovascular *** of consciousness was evaluated using the Glasgow Coma Scale,functional status using the Glasgow Outcome Scale,level of the mobility using the Mobility Scale for acute stroke patients,and independence in activities of daily living using the Barthel *** early physiotherapy,the level of consciousness and functional status improved significantly in Groups 1,3,and 4;mobility improved significantly in all groups;and independence in activities of daily living improved significantly in Groups 1 and *** discharge, Groups 1 and 2 had better functional status than Groups 3 and *** of consciousness,functional status,mobility and independence in activities of daily living improved after early physiotherapy. These findings suggest that early physiotherapy improved the prognosis of patients with cerebral aneurysms who were treated by surgical clipping or endovascular *** with a worse clinical status at presentation had a poorer functional status at *** outcome of physiotherapy was not affected by whether surgical clipping or endovascular embolization was chosen for treatment of the aneurysm.

关键词： cerebral aneurysm Hunt and Hess grade Glasgow Coma Scale Glasgow Outcome Scale functional status surgical clipping endovascular treatment physiotherapy neural regeneration

Community structure of epiphytic algae on three different macrophytes at Acarlar floodplain forest(northern Turkey)

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Chinese Journal of Oceanology and Limnology 2014年第4期32卷 845-857页

作者： Hatice TUNCA Tugba ONGUN SEVINDIK Dilek Nur BAL sevil ARABACI Sakarya University Faculty of Arts and ScienceDepartment of Biology54187AdapazariTurkey

The aim of this study was to determine the species composition, biodiversity and, relative abundance of epiphytic algae and their relationship with environmental variables on three different macrophytes( Nymphaea alba, Ceratophyllum demersum, Typha latifolia) at Acarlar Floodplain Forest(AFF). Epiphytic algae were gathered monthly by collecting aquatic plants between November 2011 and October 2012, except in winter when there were no plants. In this study, 67 taxa on N. alba, 66 taxa on C. demersum and 66 taxa on T. latifolia were identified as epiphytic algae. The mean value of species richness was 17, that of diversity was 1.5 and that of evenness was 0.54 for epiphytic algae on N. alba, 17, 1.1, and 0.39 on C. demersum, and 18, 1.64, and 0.56 on T. latifolia, respectively. Oscillatoria sp. and Komvophoron crassum(Vozzen) Anagnostidis and Komárek were the most abundant and consistent epiphytic algal species, occurring in high abundance on all macrophytes. Results show that species composition of epiphytic algae was different, but diversity values were similar on all the macrophytes. The hydrological pulse is one of the most important factors determining the physical and chemical environment of the epiphytic algal community. However, substrate type also affected the colonization by F. capucina, O. sancta, P. catenata, and L. truncicola more than the epiphytic algal seasonality.

关键词： biodiversity algae water quality Nymphaea Ceratophyllum Typha

Bayesian analysis of time‑varying interactions between stock returns and foreign equity flows

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Financial Innovation 2021年第1期7卷 1075-1099页

作者： Boubekeur Baba Güven sevil Graduate School of Social Sciences Anadolu UniversityEskişehirTepebaşı26470Turkey Open Education Faculty Anadolu UniversityEskişehirTepebaşı26470Turkey

This study discusses the trading behavior of foreign investors with respect to economic uncertainty in the South Korean stock market from a time-varying *** employ a news-based measure of economic uncertainty along with the model of time-varying parameter vector autoregression with stochastic *** empirical analysis reveals several new findings about foreign investors’trading ***,we find evidence that positive feedback trading often appears during periods of high economic uncertainty,whereas negative feedback trading is exclusively observable during periods of low economic ***,the foreign investors’feedback trading appears mostly to be well-timed and often leads the time-varying economic uncertainty except in periods of global ***,lagged negative(positive)response of net flows to economic uncertainty is found to be coupled with lagged positive(negative)feedback ***,the study documents an asymmetric response of foreign investors with regard to negative and positive shocks of economic ***,we find that they instantly turn to positive feedback trading after a negative contemporaneous response of net flows to shocks of economic *** contrast,they move slowly toward negative feedback trading after a positive response of net flows to uncertainty shocks.

关键词： Stock returns Net foreign equity flows Time-varying parameter VAR Feedback trading Forecast ability Economic policy uncertainty