24 papers · ranked by Valyu relevance
Matthias Bentert, André Nichterlein
Diameter—the task of computing the length of a longest shortest path—is a fundamental graph problem. Assuming the Strong Exponential Time Hypothesis, there is no O(n 1.99) time algorithm even in sparse graphs [Roditty and Williams, 2013]. To circumvent this lower bound we aim for algorithms with running time f(k)(n +…
J. P. Rozelot, А. Г. Косовичев, Ali Kılçık
The measurement of the Sun's diameter has been first tackled by the Greek astronomers from a geometric point of view. Their estimation of ≈ 1800″, although incorrect, was not truly called into question for several centuries. The first pioneer works for measuring the Sun's diameter with an astrometric precision were…
Jenea M Bin, Daumante Suminaite, Silvia K. Benito-Kwiecinski, Linde Kegel + 6 more
Central nervous system neurons have axons that vary over 100-fold in diameter. This diversity contributes to the regulation of myelination and conduction velocity along axons, which is critical for proper nervous system function. Despite this importance, technical challenges have limited our understanding of mechanisms…
Maria A Eichel-Vogel, Daniel Soong, Melody N Sequeira, Katy LH Marshall-Phelps + 2 more
Axon diameter varies up to 100-fold between distinct neurons in the central nervous system with larger axons exhibiting proportionally faster conduction velocity. Axon diameter influences myelination, can be dynamically regulated, which might help fine-tune neural circuit function, and is altered in several diseases.…
J. P. Rozelot, А. Г. Косовичев, Ali Kılçık
The size of the diameter of the Sun has been debated for a very long time. First tackled by the Greek astronomers from a geometric point of view, an estimate, although incorrect, has been determined, not truly called into question for several centuries. The French school of astronomy, under the impetus of Mouton and…
Ziyue Yin, Haotian Zeng, Giorgos Boras, Raghavendra R. Juluri + 12 more
Diameter Control in GaAs Nanowires Authors: Ziyue Yin, Haotian Zeng, Giorgos Boras, Raghavendra R. Juluri, Huiwen Deng, Hui Jia, Chong Chen, Stephen Church, Anton Velychko, Fahad Alghamdi, Jae-Seong Park, Mingchu Tang, David Mowbray, Patrick Parkinson, Ana M. Sanchez, Huiyun Liu Controlling the diameter of…
Siyuan Liu, Qingchang Tan, Yachao Zhang, Vittorio M. N. Passaro
A method for measuring shaft diameters is presented using structured light vision measurement. After calibrating a model of the structured light measurement, a virtual plane is established perpendicular to the measured shaft axis and the image of the light stripe on the shaft is projected to the virtual plane. On the…
Jean-Pierre Rozelot, Alexander Kosovichev
Solar radius measurements and their variations -- if any -- are a difficult problem that has vexed researchers for decades. In this paper, we have attempted to clarify the various ways of expressing the definition ''solar diameter'', from a physical point of view. The concept of diameter is taken here in its broadest…
Hong-Hsi Lee, Katarina Yaros, Jelle Veraart, Jasmine Pathan + 4 more
To model the diffusion MRI signal in brain white matter, general assumptions have been made about the microstructural properties of axonal fiber bundles, such as the axonal shape and the fiber orientation dispersion. In particular, axons are modeled by perfectly circular cylinders with no diameter variation within each…
Debajyoti Mondal, N. Parthiban, Indra Rajasingh
The diameter of an undirected or a directed graph is defined to be the maximum shortest path distance over all pairs of vertices in the graph. Given an undirected graph G, we examine the problem of assigning directions to each edge of G such that the diameter of the resulting oriented graph is minimized. The minimum…
Amanda R. Young, Ryan W. Lewis, Martha Cash, Beckam Polis + 4 more
Myelin sheath lengths vary by an order of magnitude in the central nervous system (CNS) and tune the timing of neuronal signaling. Thus, variation in myelin sheath length has been proposed to coordinate the timing of neuronal signaling to ultimately impact behavior. The mechanisms to establish myelin sheath length are…
Costantino Sigismondi
The role of Venus and Mercury transits is crucial to know the past history of the solar diameter. Through the W parameter, the logarithmic derivative of the radius with respect to the luminosity, the past values of the solar luminosity can be recovered. The black drop phenomenon affects the evaluation of the instants…
Michael Paquette, Cornelius Eichner, Thomas R. Knösche, Alfred Anwander
The feasibility of non-invasive axonal diameter quantification with diffusion MRI is a strongly debated topic due to the neuroscientific potential of such information and its relevance for the axonal signal transmission speed. It has been shown that under ideal conditions, the minimal diameter producing detectable…
Chanya Deekiatphaiboon, Maliwan Oofuvong, Orarat Karnjanawanichkul, Sirikarn Siripruekpong + 1 more
'Sirikarn Siripruekpong' 'Pattamawan Bussadee'] We aimed to determine the correlation between mid-glottic transverse diameter/subglottic diameter and outer diameter of endotracheal tube (ETT) by ultrasonography in children. Ninety-five patients aged 1-8 years who underwent general anesthesia were included.…
Alexandra Schmeltzer, Eric Peterson, Daniel Lathrop, Sean German + 1 more
Simultaneous multipass resistive-pulse sensing and fluorescence imaging have been used to correlate the size and fluorescence intensity of individual E. coli lipid liposomes composed of E. coli polar lipid extract labeled with membrane-bound 3,3-dioctadecyloxacarbocyanine (DiO) fluorescent molecules. Here, a…
Masazumi Fujiwara, Yutaka Shikano, Ryuta Tsukahara, Shinichi Shikata + 1 more
Capturing the fast rotational motion of single nanoparticles has been hindered owing to the difficulty of acquiring directional information under the optical diffraction limit. Here, we report the linewidth broadening of the electron spin resonance of single nitrogen vacancy (NV) centers that matches the rotational…
Jeroen B. J. Smeets, Pauline E. Weijs, Eli Brenner
It is known that judgments about objects’ distances are influenced by familiar size: a soccer ball looks farther away than a tennis ball if their images are equally large on the retina. We here investigate whether familiar size also influences judgments about the size of images of objects that are presented…
Rahul Rao, Jennifer Carpena-Nunez, Benji Maruyama
Increasing the yield of single-walled carbon nanotubes (CNTs) during growth is critical to their use in widespread applications. Here, we show that we can increase the CNT yield significantly by using a simple non-isothermal, continuous cooling procedure during CNT growth. While our typical isothermal growth conditions…
Robert G. Donnelly, Alexander F. Thome
For a given family of similar shapes, what we call a "unit shape" strongly analogizes the role of the unit circle within the family of all circles. Within many such families of similar shapes, we present what we believe is naturally and intrinsically unital about their unit shapes. We present a number of calculus…
Authors not listed
Contact Glow Discharge Electrolysis (CGDE) denotes a plasma inside a vapor layer surrounding a gas-evolving electrode immersed in an aqueous electrolyte and operated at high voltages. We used a high-speed camera to image the formation of the vapor layer as well as its dynamic behavior during continuous CGDE on a Au…
Hafsa Khurshid, Rahana Yoosuf, Bashar Afif Issa, Atta G. Attaelmanan + 2 more
'George Hadjipanayis' 'Imre Bakonyi'] Cobalt nanowires have been synthesized by electrochemical deposition using track-etched anodized aluminum oxide (AAO) templates. Nanowires with varying spacing-to-diameter ratios were prepared, and their magnetic properties were investigated. It is found that the nanowires’ easy…
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The unique properties of lignin nanoparticles (LNPs)—uniform shape, surface properties and nanoscale—carry great potential for the desired material utilization of technical lignins. Especially, the particle size distribution and dispersity of LNPs are the key for their successful valorization. However, characterization…
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In this second part, we present the explicit analytical expression of the framework introduced in Part I. The formulation yields closed-form predictions for capillary rise and depression in cylindrical geometries and extends naturally to a wide range of configurations. It shows that the contact angle, rather than being…
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Fundamentally, maintaining crystalline quality at the few-nanometer scale is challenging due to reduced diffusion pathways and high surface energy. In many applications, including modern electronics, highly crystalline thin films are essential for ensuring optimal performance, reliability and preserving intrinsic…