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Central European Journal of Physics最新文献

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Isotope analyses of the lake sediments in the Plitvice Lakes, Croatia 克罗地亚普利特维采湖湖泊沉积物的同位素分析
Central European Journal of Physics Pub Date : 2014-06-14 DOI: 10.2478/s11534-014-0490-7
N. Horvatinčič, Andreja Sironić, J. Barešić, I. K. Bronić, J. Nikolov, N. Todorović, J. Hansman, M. Krmar
{"title":"Isotope analyses of the lake sediments in the Plitvice Lakes, Croatia","authors":"N. Horvatinčič, Andreja Sironić, J. Barešić, I. K. Bronić, J. Nikolov, N. Todorović, J. Hansman, M. Krmar","doi":"10.2478/s11534-014-0490-7","DOIUrl":"https://doi.org/10.2478/s11534-014-0490-7","url":null,"abstract":"The analyses of radioactive isotopes 14C, 137Cs and 210Pb, and stable isotope 13C were performed in the sediment cores, top 40 cm, taken in 2011 from karst lakes Prošće and Kozjak in the Plitvice Lakes National Park, central Croatia. Frozen sediment cores were cut into 1 cm thick layers and dried. 14C activity in both carbonate and organic fractions was measured using accelerator mass spectrometry technique with graphite synthesis. 137Cs, 210Pb, 214Pb and 214Bi were measured by low level gamma spectrometry method on ORTECHPGe detector with the efficiency of 32%.Distribution of 14C activity from both lakes showed increase of the 14C activity in the top 10–12 cm in both carbonate and organic fractions as a response to thermonuclear bomb-produced 14C in the atmosphere in the sixties of the 20th century. Anthropogenically produced 137Cs was also observed in sediment profiles. Sedimentation rates for both lake sediments were estimated based on the unsupported 210Pb activity.Different 14C activity of the carbonate fraction (63–80 pMC, percent of modern carbon) and organic fraction (82–93 pMC) is the result of geochemical and biological processes of the sediment precipitation in the lake waters. This is also confirmed by the δ13C values of both fractions. Carbon isotope composition, a14C and δ13C, was compared with the lake sediments from the same lakes collected in 1989 and 2003.","PeriodicalId":50985,"journal":{"name":"Central European Journal of Physics","volume":"1 1","pages":"707-713"},"PeriodicalIF":0.0,"publicationDate":"2014-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90525697","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: 15
Systematic study of deformation effects on fusion cross-sections using various proximity potentials 系统研究了不同接近电位对熔合截面变形的影响
Central European Journal of Physics Pub Date : 2014-05-31 DOI: 10.2478/s11534-014-0451-1
T. Rajbongshi, K. Kalita
{"title":"Systematic study of deformation effects on fusion cross-sections using various proximity potentials","authors":"T. Rajbongshi, K. Kalita","doi":"10.2478/s11534-014-0451-1","DOIUrl":"https://doi.org/10.2478/s11534-014-0451-1","url":null,"abstract":"The influence of static quadrupole and hexadecapole (positive & negative) deformation of targets are studied using eleven different versions of nuclear potentials. The height and position of the interaction barrier for the reactions induced by spherical projectile (16O) on the deformed targets such as 166Er, 154Sm and 176Yb have been estimated. It is found that the nucleus-nucleus potential strongly depends on the value of the deformation parameters and orientation of the target. The experimental fusion cross-section of the reactions 16O + 176Yb, 16O +166Er and 16O +154Sm are investigated by applyingWong’s formula using various parameterizations of the proximity potential as well as an assessment of the results of a multi-dimensional barrier penetration model (BPM). The fusion cross-sections by Prox 77, Prox 88, Prox 00, Prox 00DP, Denisov DP, Bass 80, CW 76 and AW 95 potentials are found to be better than the rest in comparison to experimental data.","PeriodicalId":50985,"journal":{"name":"Central European Journal of Physics","volume":"45 1","pages":"433-444"},"PeriodicalIF":0.0,"publicationDate":"2014-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89914421","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
Delay-induced state transition and resonance in periodically driven tumor model with immune surveillance 免疫监测下周期性驱动肿瘤模型延迟诱导的状态转换和共振
Central European Journal of Physics Pub Date : 2014-05-31 DOI: 10.2478/s11534-014-0460-0
Tao Yang, Q. Han, C. Zeng, Hua Wang, Yunchang Fu, Chun Zhang
{"title":"Delay-induced state transition and resonance in periodically driven tumor model with immune surveillance","authors":"Tao Yang, Q. Han, C. Zeng, Hua Wang, Yunchang Fu, Chun Zhang","doi":"10.2478/s11534-014-0460-0","DOIUrl":"https://doi.org/10.2478/s11534-014-0460-0","url":null,"abstract":"The phenomenon of stochastic resonance (SR) in a tumor growth model under the presence of immune surveillance is investigated. Time delay and cross-correlation between multiplicative and additive noises are considered in the system. The signal-to-noise ratio (SNR) is calculated when periodic signal is introduced multiplicatively. Our results show that: (i) the time delay can accelerate the transition from the state of stable tumor to that of extinction, however the correlation between two noises can accelerate the transition from the state of extinction to that of stable tumor; (ii) the time delay and correlation between two noises can lead to a transition between SR and double SR in the curve of SNR as a function of additive noise intensity, however for the curve of SNR as a function of multiplicative noise intensity, the time delay can cause the SR phenomenon to disappear, and the cross-correlation between two noises can lead to a transition from SR to stochastic reverse-resonance. Finally, we compare the SR phenomenon for the multiplicative periodic signal with that for additive periodic signal in the tumor growth model with immune surveillance.","PeriodicalId":50985,"journal":{"name":"Central European Journal of Physics","volume":"1 1","pages":"383-391"},"PeriodicalIF":0.0,"publicationDate":"2014-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74843936","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: 10
Afterglow and thermoluminescence of ZrO2 nanopowders ZrO2纳米粉体的余辉和热释光
Central European Journal of Physics Pub Date : 2014-05-06 DOI: 10.2478/s11534-014-0456-9
L. Puust, V. Kiisk, K. Utt, H. Mändar, I. Sildos
{"title":"Afterglow and thermoluminescence of ZrO2 nanopowders","authors":"L. Puust, V. Kiisk, K. Utt, H. Mändar, I. Sildos","doi":"10.2478/s11534-014-0456-9","DOIUrl":"https://doi.org/10.2478/s11534-014-0456-9","url":null,"abstract":"A careful study of the phosphorescence afterglow and the thermoluminescence (TL) of sol-gel-prepared m-ZrO2 nanocrystalline powders in an extended temperature range −100 to 300 °C was carried out. Wavelength-resolved TL proved the existence of a single active luminescence centre in this temperature range. A TL method based on various heating rates was used to derive more reliable trap depths of 0.75, 0.95, 1.25, 1.46 and 1.66 eV whereas deconvolution methods provided somewhat lower values. The most intense room-temperature afterglows (that were easily observable beyond 1000 s) were obtained from samples annealed at 1250 and 1500 °C, and were attributed mainly to depopulation of the 1.25 eV traps.","PeriodicalId":50985,"journal":{"name":"Central European Journal of Physics","volume":"95 1","pages":"415-420"},"PeriodicalIF":0.0,"publicationDate":"2014-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90531674","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: 15
Realizing actual feedback control of complex network 实现复杂网络的实际反馈控制
Central European Journal of Physics Pub Date : 2014-05-06 DOI: 10.2478/s11534-014-0462-y
Chengyi Tu, Yuhua Cheng
{"title":"Realizing actual feedback control of complex network","authors":"Chengyi Tu, Yuhua Cheng","doi":"10.2478/s11534-014-0462-y","DOIUrl":"https://doi.org/10.2478/s11534-014-0462-y","url":null,"abstract":"In this paper, we present the concept of feedbackability and how to identify the Minimum Feedbackability Set of an arbitrary complex directed network. Furthermore, we design an estimator and a feedback controller accessing one MFS to realize actual feedback control, i.e. control the system to our desired state according to the estimated system internal state from the output of estimator. Last but not least, we perform numerical simulations of a small linear time-invariant dynamics network and a real simple food network to verify the theoretical results. The framework presented here could make an arbitrary complex directed network realize actual feedback control and deepen our understanding of complex systems.","PeriodicalId":50985,"journal":{"name":"Central European Journal of Physics","volume":"7 1","pages":"406-414"},"PeriodicalIF":0.0,"publicationDate":"2014-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87368202","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
Bistability of Feshbach resonance in optical cavity 光学腔中费什巴赫共振的双稳性
Central European Journal of Physics Pub Date : 2014-05-06 DOI: 10.2478/s11534-014-0459-6
Xiao-Qiang Xu, You-Quan Li
{"title":"Bistability of Feshbach resonance in optical cavity","authors":"Xiao-Qiang Xu, You-Quan Li","doi":"10.2478/s11534-014-0459-6","DOIUrl":"https://doi.org/10.2478/s11534-014-0459-6","url":null,"abstract":"We consider Feshbach resonance in an optical cavity where photons interact with atoms and molecules dispersively. From mean-field theory we obtain multiple fixed-point solutions, which is strongly related to the phenomenon of bistability. Adiabatic evolutions demonstrate hysteretic behaviors by varying pump-cavity detuning from opposite directions. We also use the quantum model to check mean-field results which match perfectly. The analysis here may enrich the study of particle-photon interaction systems.","PeriodicalId":50985,"journal":{"name":"Central European Journal of Physics","volume":"59 1","pages":"427-432"},"PeriodicalIF":0.0,"publicationDate":"2014-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74376682","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
Spinless relativistic particle in energy-dependent potential and normalization of the wave function 能量依赖势中的无自旋相对论粒子及波函数的归一化
Central European Journal of Physics Pub Date : 2014-05-06 DOI: 10.2478/s11534-014-0457-8
A. Benchikha, L. Chetouani
{"title":"Spinless relativistic particle in energy-dependent potential and normalization of the wave function","authors":"A. Benchikha, L. Chetouani","doi":"10.2478/s11534-014-0457-8","DOIUrl":"https://doi.org/10.2478/s11534-014-0457-8","url":null,"abstract":"The problem of normalization related to a Klein-Gordon particle subjected to vector plus scalar energy-dependent potentials is clarified in the context of the path integral approach. In addition the correction relating to the normalizing constant of wave functions is exactly determined. As examples, the energy dependent linear and Coulomb potentials are considered. The wave functions obtained via spectral decomposition, were found exactly normalized.","PeriodicalId":50985,"journal":{"name":"Central European Journal of Physics","volume":"142 1","pages":"392-405"},"PeriodicalIF":0.0,"publicationDate":"2014-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86163522","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: 11
Transient electro-osmotic flow of generalized Maxwell fluids in a straight pipe of circular cross section 广义麦克斯韦流体在圆截面直管中的瞬态电渗透流动
Central European Journal of Physics Pub Date : 2014-05-06 DOI: 10.2478/s11534-014-0463-x
Shaowei Wang, Moli Zhao, Xicheng Li
{"title":"Transient electro-osmotic flow of generalized Maxwell fluids in a straight pipe of circular cross section","authors":"Shaowei Wang, Moli Zhao, Xicheng Li","doi":"10.2478/s11534-014-0463-x","DOIUrl":"https://doi.org/10.2478/s11534-014-0463-x","url":null,"abstract":"The transient electro-osmotic flow of a generalized Maxwell fluid with fractional derivative in a narrow capillary tube is examined. With the help of an integral transform method, analytical expressions are derived for the electric potential and transient velocity profile by solving the linearized Poisson-Boltzmann equation and the Navier-Stokes equation. It was shown that the distribution and establishment of the velocity consists of two parts, the steady part and the unsteady one. The effects of relaxation time, fractional derivative parameter, and the Debye-Hückel parameter on the generation of flow are shown graphically and analyzed numerically. The velocity overshoot and oscillation are observed and discussed.","PeriodicalId":50985,"journal":{"name":"Central European Journal of Physics","volume":"6 1","pages":"445-451"},"PeriodicalIF":0.0,"publicationDate":"2014-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74420465","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: 27
On some new forms of lattice integrable equations 关于格可积方程的一些新形式
Central European Journal of Physics Pub Date : 2014-05-01 DOI: 10.2478/s11534-014-0455-x
C. N. Babalic, A. Carstea
{"title":"On some new forms of lattice integrable equations","authors":"C. N. Babalic, A. Carstea","doi":"10.2478/s11534-014-0455-x","DOIUrl":"https://doi.org/10.2478/s11534-014-0455-x","url":null,"abstract":"Inspired by the forms of delay-Painleve equations, we consider some new differential-discrete systems of KdV, mKdV and Sine-Gordon — type related by simple one way Miura transformations to classical ones. Using Hirota bilinear formalism we construct their new integrable discretizations, some of them having higher order. In particular, by this procedure, we show that the integrable discretization of intermediate sine-Gordon equation is exactly lattice mKdV and also we find a bilinear form of the recently proposed lattice Tzitzeica equation. Also the travelling wave reduction of these new lattice equations is studied and it is shown that all of them, including the higher order ones, can be integrated to Quispel-Roberts-Thomson (QRT) mappings.","PeriodicalId":50985,"journal":{"name":"Central European Journal of Physics","volume":"1 1","pages":"341-347"},"PeriodicalIF":0.0,"publicationDate":"2014-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79244657","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: 7
First steps toward the construction of a hyperphase diagram that covers different classes of short polymer chains 第一步迈向超相图的建设，涵盖不同类别的短聚合物链
Central European Journal of Physics Pub Date : 2014-04-29 DOI: 10.2478/s11534-014-0461-z
S. A. Sabeur
{"title":"First steps toward the construction of a hyperphase diagram that covers different classes of short polymer chains","authors":"S. A. Sabeur","doi":"10.2478/s11534-014-0461-z","DOIUrl":"https://doi.org/10.2478/s11534-014-0461-z","url":null,"abstract":"We present the results of a multicanonical Monte Carlo study of flexible and wormlike polymer chains, where we investigate how the polymer structures observed during the simulations, mainly coil, liquid, and crystalline structures, can help to construct a hyperphase diagram that covers different polymer classes according to their thermodynamic behavior.","PeriodicalId":50985,"journal":{"name":"Central European Journal of Physics","volume":"42 12 1","pages":"421-426"},"PeriodicalIF":0.0,"publicationDate":"2014-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82855618","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
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