Showing 1,521 - 1,540 results of 63,767 for search '"time"', query time: 0.12s Refine Results
  1. 1521

    Effects of melatonin on planaria head regeneration are dependent on both timing and duration of exposure by Simon C. Beeching, Hanna E. Ruland, Katelyn M. Sparks

    Published 2025-01-01
    “…We investigated how both the timing and duration of melatonin exposure affect head regeneration in the planaria Phagocata gracilis (Haldeman). …”
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  2. 1522

    Experimental Evaluation of MIMO-OFDM System with Rateless Space-Time Block Code by Ali H. Alqahtani, Khaled Humadi, Ahmed Iyanda Sulyman, Abdulhameed Alsanie

    Published 2019-01-01
    “…One technique to cope with this problem is the rateless space-time block code (RSTBC). This paper presents experimental results on the performance of a 2×2 MIMO-OFDM system with RSTBC as measured in a testbed implemented with field-programmable gate array (FPGA). …”
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  3. 1523
  4. 1524

    A Run-Time Reconfigurable Ge Field-Effect Transistor With Symmetric On-States by Andreas Fuchsberger, Lukas Wind, Daniele Nazzari, Larissa Kuhberger, Daniel Popp, Johannes Aberl, Enrique Prado Navarrete, Moritz Brehm, Lilian Vogl, Peter Schweizer, Sebastian Lellig, Xavier Maeder, Masiar Sistani, Walter M. Weber

    Published 2024-01-01
    “…Here, we present a Ge based reconfigurable transistor, capable of dynamic run-time switching between n- and p-type operation with enhanced performance compared to state-of-the- art Si devices. …”
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  5. 1525
  6. 1526
  7. 1527

    An Iteration-Time Combination Method to Reduce the Dynamic Degradation of Digital Chaotic Maps by Yao Wu, Lingfeng Liu

    Published 2020-01-01
    “…Experimental results show that the chaotic map based on the iteration-time combination method is more complicated and effective. …”
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  8. 1528
  9. 1529

    Bounds of Double Integral Dynamic Inequalities in Two Independent Variables on Time Scales by S. H. Saker

    Published 2011-01-01
    “…Our aim in this paper is to establish some explicit bounds of the unknown function in a certain class of nonlinear dynamic inequalities in two independent variables on time scales which are unbounded above. These on the one hand generalize and on the other hand furnish a handy tool for the study of qualitative as well as quantitative properties of solutions of partial dynamic equations on time scales. …”
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  10. 1530
  11. 1531
  12. 1532

    First-Order Boundary Value Problem with Nonlinear Boundary Condition on Time Scales by Ya-Hong Zhao

    Published 2011-01-01
    “…This work is concerned with the following first-order dynamic equation on time scale ,  xΔ(t)+p(t)x(σ(t))=f(t,x(t)),  t∈[0,T]𝕋 with the nonlinear boundary condition x(0)=g(x(σ(T))). …”
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  13. 1533

    Reliability and validity of the Lithuanian version of headache-attributed lost time (HALT) index by I. Zagorskienė, E. Abelkis, R. Mameniškienė

    Published 2018-03-01
    “…Headache-Attributed Lost Time (HALT) index is a tool recommended by WHO to determine the burden of headache to the patient and his everyday life. …”
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  14. 1534

    Time-varying channel estimation in reconfigurable intelligent surface assisted communication system by Kai SHAO, Ben LU, Guangyu WANG

    Published 2024-01-01
    “…Aiming at the key problems need to be solved, such as cascade channel sparse representation, time-varying channel parameter tracking and signal reconstruction, for time-varying cascade channels estimation of reconfigurable intelligent surface (RIS) assisted communication system, a Khatri-Rao and hierarchical Bayesian Kalman filter (KR-HBKF) algorithm was proposed.Firstly, the Khatri-Rao product and Kronecker product transformations were used to obtain the sparse representation of RIS cascaded channels based on the sparse characteristics of channels, thus the RIS cascaded channel estimation problem was transformed into a low-dimensional sparse signal recovery problem.Then, according to the state evolution model of RIS cascaded channel, the time correlation parameter was introduced into the prediction model of HBKF algorithm, and the improved HBKF was applied to solve the problem of time-varying channel parameter tracking and signal reconstruction for completing the time-varying cascaded channels estimation.The sparsity and time correlation of the channel were comprehensively considered in the KR-HBKF algorithm, thus better estimation accuracy could be obtained with small pilot overhead.Compared with the traditional compressed sensing algorithm, the simulation results show that the proposed algorithm has about 5 dB estimated performance improvement, and better robustness performance under different time-varying channel conditions.…”
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  15. 1535

    Presynaptic Ionotropic Receptors Controlling and Modulating the Rules for Spike Timing-Dependent Plasticity by Matthijs B. Verhoog, Huibert D. Mansvelder

    Published 2011-01-01
    “…Furthermore, we will discuss how interaction between different types of ionotropic receptors may create “timing” windows during which particular timing rules lead to synaptic changes.…”
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  16. 1536

    Impact of Microwave Time on the Structure and Functional Properties of Glycosylated Soy 7S Globulins by Jixin Zhang, Tao Cui, Lan Zhang, Huiqing Xu, Jingguo Xu, Jun Wang

    Published 2025-01-01
    “…This study explores the mechanism of how microwave processing time affects the structure and functional properties of glycosylated soybean 7S protein and identifies 60 s as the optimal microwave processing time. …”
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  17. 1537

    A real-time detection method for multi-scale ships in complex scenes by Weina ZHOU, Lu LIU

    Published 2022-10-01
    “…Ship detection plays an important role in tasks such as military reconnaissance, maritime target tracking, and maritime traffic control.However, due to the influence of variable sizes of ships and complex background of sea surface, detecting multi-scale ships remains a challenge in complex sea surfaces.To solve this problem, an improved YOLOv4 method based on multi-layers information interactive fusion and attention mechanism was proposed.Multi-layers information interactive fusion (MLIF) and multi-attention receptive field (MARF) were applied and combined reasonably to build a bidirectional fine-grained feature pyramid.MLIF was used to fuse feature of different scales, which not only concatenated high-level semantic features from deep layers, but also reshaped richer features from shallower layers.MARF consisted of receptive field block (RFB) and attention mechanism module, which effectively emphasized the important features and suppressed unnecessary ones.In addition, to further evaluate the performance of the proposed method, experiments were carried out on Singapore maritime dataset (SMD).The results illustrate that the method proposed can effectively solve the problem of difficult detection of multi-scale ships in complex marine environment, and meet the real-time requirements at the same time.…”
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  18. 1538

    Reconstruction in time-warped weighted shift-invariant spaces with application to spline subspaces by Jun Xian, Yongjin Li

    Published 2003-01-01
    “…In the spline subspace, we give a reconstruction formula in a time-warped spline subspace.…”
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  19. 1539

    Becoming a leader in psychiatry and mental health: now is the time to step forward by Juan Oms, Roberto Martinez Caballero, Jorge Betancourt, Marcos A. Sanchez-Gonzalez

    Published 2024-11-01
    “…This review explores the barriers to integrating leadership into psychiatric education, including limited time and resources, the absence of formal leadership curricula, and the undervaluation of leadership skills within medical training.Evidence from existing leadership development programs demonstrates the positive impact of leadership education on reducing burnout and enhancing empathy among medical professionals. …”
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  20. 1540

    A Time Modulated Printed Dipole Antenna Array for Beam Steering Application by Ruchi Gahley, Banani Basu

    Published 2017-01-01
    “…This paper presents time modulated beam steered antenna array without phase shifters. …”
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