arXiv: Biological Physics最新文献_第4页

Single Molecule Data Analysis: An Introduction 单分子数据分析:导论

arXiv: Biological Physics Pub Date : 2016-06-01 DOI: 10.1002/9781119324560.CH4

M. Tavakoli, J. N. Taylor, Chun-Biu Li, T. Komatsuzaki, S. Press'e

引用次数: 33

Analysis of a stochastic model for bacterial growth and the lognormality of the cell-size distribution 细菌生长的随机模型分析和细胞大小分布的对数正态性

arXiv: Biological Physics Pub Date : 2016-05-11 DOI: 10.7566/JPSJ.85.074004

K. Yamamoto, J. Wakita

引用次数: 4

Dark States in Quantum Photosynthesis 量子光合作用中的暗态

arXiv: Biological Physics Pub Date : 2016-03-19 DOI: 10.1007/978-3-319-91092-5_2

S. Kozyrev, I. Volovich

引用次数: 10

Active Matter Clusters at Interfaces 接口上的活性物质簇

arXiv: Biological Physics Pub Date : 2016-03-09 DOI: 10.3389/fmats.2016.00013

K. Copenhagen, A. Gopinathan

{"title":"Active Matter Clusters at Interfaces","authors":"K. Copenhagen, A. Gopinathan","doi":"10.3389/fmats.2016.00013","DOIUrl":"https://doi.org/10.3389/fmats.2016.00013","url":null,"abstract":"Collective and directed motility or swarming is an emergent phenomenon displayed by many self-organized assemblies of active biological matter such as clusters of embryonic cells during tissue development, cancerous cells during tumor formation and metastasis, colonies of bacteria in a biofilm, or even flocks of birds and schools of fish at the macro-scale. Such clusters typically encounter very heterogeneous environments. What happens when a cluster encounters an interface between two different environments has implications for its function and fate. Here we study this problem by using a mathematical model of a cluster that treats it as a single cohesive unit that moves in two dimensions by exerting a force/torque per unit area whose magnitude depends on the nature of the local environment. We find that low speed (overdamped) clusters encountering an interface with a moderate difference in properties can lead to refraction or even total internal reflection of the cluster. For large speeds (underdamped), where inertia dominates, the clusters show more complex behaviors crossing the interface multiple times and deviating from the predictable refraction and reflection for the low velocity clusters. We then present an extreme limit of the model in the absense of rotational damping where clusters can become stuck spiraling along the interface or move in large circular trajectories after leaving the interface. Our results show a wide range of behaviors that occur when collectively moving active biological matter moves across interfaces and these insights can be used to control motion by patterning environments.","PeriodicalId":360136,"journal":{"name":"arXiv: Biological Physics","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130976591","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

Optical diffraction tomography techniques for the study of cell pathophysiology 用于细胞病理生理学研究的光学衍射断层扫描技术

arXiv: Biological Physics Pub Date : 2016-03-02 DOI: 10.18287/JBPE16.02.020201

Kyoohyun Kim, Jonghee Yoon, Seungwoo Shin, Sangyun Lee, Su-A Yang, Yongkeun Park

引用次数: 143

A cycling state that can lead to glassy dynamics in intracellular transport 一种循环状态，可导致细胞内运输中的玻璃动力学

arXiv: Biological Physics Pub Date : 2016-02-13 DOI: 10.1103/PHYSREVX.6.011037

M. Scholz, S. Burov, Kimberly L. Weirich, B. Scholz, S. Tabei, M. Gardel, A. Dinner

引用次数: 19

Excluded volume effect enhances the homology pairing of model chromosomes 排除体积效应增强了模式染色体的同源配对

arXiv: Biological Physics Pub Date : 2015-12-03 DOI: 10.1587/NOLTA.7.66

Kazunori Takamiya, Keisuke Yamamoto, Shuhei Isami, H. Nishimori, A. Awazu

引用次数: 3

The radical-pair mechanism as a paradigm for the emerging science of quantum biology 作为量子生物学新兴科学范式的自由基对机制

arXiv: Biological Physics Pub Date : 2015-12-01 DOI: 10.1142/S0217984915300136

I. Kominis

引用次数: 24

Exploring the effects of photon correlations from thermal sources on bacterial photosynthesis 探讨热源光子相关性对细菌光合作用的影响

arXiv: Biological Physics Pub Date : 2015-11-23 DOI: 10.1016/J.RINP.2016.11.024

P. Manrique, F. Caycedo-Soler, A. D. Mendoza, F. Rodr'iguez, L. Quiroga, N. Johnson

引用次数: 3

Engineering sensorial delay to control phototaxis and emergent collective behaviors 控制趋光性和紧急集体行为的工程感觉延迟

arXiv: Biological Physics Pub Date : 2015-11-14 DOI: 10.1103/PhysRevX.6.011008

M. Mijalkov, Austin Mcdaniel, J. Wehr, G. Volpe

{"title":"Engineering sensorial delay to control phototaxis and emergent collective behaviors","authors":"M. Mijalkov, Austin Mcdaniel, J. Wehr, G. Volpe","doi":"10.1103/PhysRevX.6.011008","DOIUrl":"https://doi.org/10.1103/PhysRevX.6.011008","url":null,"abstract":"Collective motions emerging from the interaction of autonomous mobile individuals play a key role in many phenomena, from the growth of bacterial colonies to the coordination of robotic swarms. For these collective behaviours to take hold, the individuals must be able to emit, sense and react to signals. When dealing with simple organisms and robots, these signals are necessarily very elementary, e.g. a cell might signal its presence by releasing chemicals and a robot by shining light. An additional challenge arises because the motion of the individuals is often noisy, e.g. the orientation of cells can be altered by Brownian motion and that of robots by an uneven terrain. Therefore, the emphasis is on achieving complex and tunable behaviors from simple autonomous agents communicating with each other in robust ways. Here, we show that the delay between sensing and reacting to a signal can determine the individual and collective long-term behavior of autonomous agents whose motion is intrinsically noisy. We experimentally demonstrate that the collective behaviour of a group of phototactic robots capable of emitting a radially decaying light field can be tuned from segregation to aggregation and clustering by controlling the delay with which they change their propulsion speed in response to the light intensity they measure. We track this transition to the underlying dynamics of this system, in particular, to the ratio between the robots' sensorial delay time and the characteristic time of the robots' random reorientation. Supported by numerics, we discuss how the same mechanism can be applied to control active agents, e.g. airborne drones, moving in a three-dimensional space.","PeriodicalId":360136,"journal":{"name":"arXiv: Biological Physics","volume":"67 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132216593","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: 70