Structural Health Monitoring System Developed for Dalian Stadium

2016 ◽  
Vol 16 (04) ◽  
pp. 1640018 ◽  
Author(s):  
Liang Ren ◽  
Chao-Lin Yuan ◽  
Hong-Nan Li ◽  
Ting-Hua Yi
Keyword(s):  
Monitoring System ◽  
Health Monitoring ◽  
Monitoring Program ◽  
Structural Features ◽  
Health Monitoring System ◽  
Long Span ◽  
Peripheral Structure ◽  
Operation Period ◽  
Safe Condition ◽  
Permanent Structure

The peripheral structure of Dalian stadium is a long-span spatial truss structure. To ensure the safety of the peripheral structure during construction and operation period, the permanent structure health monitoring system is implemented. This paper first introduces the structural features of the Dalian stadium, and then illustrates the permanent monitoring program from the aspects of the hardware, the monitoring scheme and the function. This developed monitoring system is utilized to monitor the stress of the truss, and the dynamic response of the structure. Large amounts of data are obtained through the health monitoring system, and thus the safe condition of the structure can be evaluated based on data analysis.

The microanatomy of the optic ganglia of Munida irrasa (Decapoda: Galatheidae)

1976 ◽  
Vol 54 (8) ◽  
pp. 1242-1255 ◽  
Author(s):  
Charles R. Bursey
Keyword(s):  
Serial Sections ◽  
Fiber Tract ◽  
Lamina Ganglionaris ◽  
Peripheral Structure ◽  
Receptor Organ ◽  
Medulla Terminalis ◽  
To Receive ◽  
The Brain ◽  
Proximal Zone ◽  
Invertebrate Ganglia

The microanatomy of the optic ganglia of Munida irrasa was examined by reconstruction from stained serial sections. There are four optic ganglia arranged in a consecutive manner: a distal lamina ganglionaris followed by a medulla externis, medulla internis, and medulla terminalis. Two optic chiasmata are present. Typically, the major constituents of invertebrate ganglia are present: rind, neuropil, blood sinuses, hemocytes, and glia.Neurosecretory cells are found within each of the four ganglia. They are arranged at regular intervals throughout the proximal zone of the lamina ganglionaris. They are collected into ganglionic X organs in the other three ganglia. The medulla externis X organ sends its fiber tract into the lamina ganglionaris. The medulla internis X organ and the medulla terminalis X organ send their combined fiber tract into the sinus gland.The sinus gland is the only peripheral structure to receive axons from cells of the optic ganglia. The organ of Bellonci is wholly contained within the medulla terminalis. A cavity receptor organ is present in the periphery of the eyestalk; however, its nerve parallels the optic ganglia and enters the brain directly.

scholarly journals Simulation of the apparent diffusion of helium-3 in the human acinus

2007 ◽  
Vol 103 (1) ◽  
pp. 249-254 ◽  
Author(s):  
Sylvia Verbanck ◽  
Manuel Paiva
Keyword(s):  
Initial Conditions ◽  
Model Structure ◽  
Point Model ◽  
Free Diffusion ◽  
Time Intervals ◽  
Hyperpolarized Helium ◽  
Lung Structure ◽  
Peripheral Structure ◽  
Apparent Diffusion

Functional MRI of the lungs with hyperpolarized helium provides an index of apparent diffusion measured over several seconds (ADCsec) that is only 2% of its free diffusion in air (0.88 cm2/s). The potential of ADCsec to noninvasively assess in vivo lung structure of diseased lungs at the length scales corresponding to several seconds is critically dependent on the exact link between ADCsec and lung peripheral structure. To understand the intruigingly small ADCsec, numerical simulations of gas transport were performed in 1) a trumpet model, 2) a symmetrical, and 3) an asymmetrical multiple-branch-point model of the human acinus. For initial gas boluses in different locations of the acinar models, ADCsec was quantified as follows. At different time intervals, we computed a coefficient of variation (CoV) of the concentration distributions within each acinar model. The slope in the semilog plot of log(CoV) vs. time was proportional to the ADCsec generated by the internal model structure, provided that the outer model boundaries were similar across all models (i.e., similar cumulative cross section vs. average path length). The simulations revealed an ADCsec that amounted to ∼1% of free diffusion in the trumpet model of the acinus, i.e., corresponding to free diffusion within the acinar geometric boundaries. Our simulations show that for initial conditions corresponding to those used in MRI experiments, intra-acinar branching introduces a dramatic diffusion delay, comparable to what is observed experimentally.

scholarly journals Dissociation of Oct-1 from the Nuclear Peripheral Structure Induces the Cellular Aging-associated Collagenase Gene Expression

1997 ◽  
Vol 8 (12) ◽  
pp. 2407-2419 ◽  
Author(s):  
Shin-ichiro Imai ◽  
Seiji Nishibayashi ◽  
Koji Takao ◽  
Masayuki Tomifuji ◽  
Tadahiro Fujino ◽  
...  
Keyword(s):  
Aging Process ◽  
Nuclear Periphery ◽  
Nuclear Lamina ◽  
Binding Activity ◽  
Cellular Aging ◽  
Population Doubling ◽  
Pou Domain ◽  
Peripheral Structure ◽  
Immortalized Cells ◽  
Collagenase Gene

The cellular aging-associated transcriptional repressor that we previously named as Orpheus was identical to Oct-1, a member of the POU domain family. Oct-1 represses the collagenase gene, one of the cellular aging-associated genes, by interacting with an AT-richcis-element in the upstream of the gene in preimmortalized cells at earlier population-doubling levels and in immortalized cells. In these stages of cells, considerable fractions of the Oct-1 protein were prominently localized in the nuclear periphery and colocalized with lamin B. During the cellular aging process, however, this subspecies of Oct-1 disappeared from the nuclear periphery. The cells lacking the nuclear peripheral Oct-1 protein exhibited strong collagenase expression and carried typical senescent morphologies. Concomitantly, the binding activity and the amount of nuclear Oct-1 protein were reduced in the aging process and resumed after immortalization. However, the whole cellular amounts of Oct-1 protein were not significantly changed during either process. Thus, the cellular aging-associated genes including the collagenase gene seemed to be derepressed by the dissociation of Oct-1 protein from the nuclear peripheral structure. Oct-1 may form a transcriptional repressive apparatus by anchoring nuclear matrix attachment regions onto the nuclear lamina in the nuclear periphery.

scholarly journals n-QUASI-ISOTOPY I: QUESTIONS OF NILPOTENCE

2005 ◽  
Vol 14 (05) ◽  
pp. 571-602 ◽  
Author(s):  
SERGEY A. MELIKHOV ◽  
DUŠAN REPOVŠ
Keyword(s):  
Fundamental Group ◽  
Piecewise Linear ◽  
Equivalence Relations ◽  
Connected Sum ◽  
Structure Preserving ◽  
Singular Link ◽  
Peripheral Structure ◽  
Fibered Link ◽  
Link Homotopy ◽  
Baer’S Theorem

It is well-known that no knot can be cancelled in a connected sum with another knot, whereas every link can be cancelled up to link homotopy in a (componentwise) connected sum with another link. In this paper we address the question whether the noncancellation property of knots holds for (piecewise-linear) links up to some stronger analogue of link homotopy, which still does not distinguish between sufficiently close C0-approximations of a topological link. We introduce a sequence of such increasingly stronger equivalence relations under the name of k-quasi-isotopy, k∈ℕ; all of them are weaker than isotopy (in the sense of Milnor). We prove that every link can be cancelled up to peripheral structure preserving isomorphism of any quotient of the fundamental group, functorially invariant under k-quasi-isotopy; functoriality means that the isomorphism between the quotients for links related by any allowable crossing change fits in the commutative diagram with the fundamental group of the complement to the intermediate singular link. The proof invokes Baer's theorem on the join of subnormal locally nilpotent subgroups. On the other hand, the integral generalized ( lk ≠ 0) Sato–Levine invariant [Formula: see text] is invariant under 1-quasi-isotopy, but is not determined by any quotient of the fundamental group (endowed with the peripheral structure), functorially invariant under 1-quasi-isotopy — in contrast to Waldhausen's theorem.As a byproduct, we use [Formula: see text] to determine the image of the Kirk–Koschorke invariant [Formula: see text] of fibered link maps.

scholarly journals Ventilation heterogeneity in smokers: role of unequal lung expansion and peripheral lung structure

2020 ◽  
Vol 129 (3) ◽  
pp. 583-590 ◽  
Author(s):  
Sylvia A.B. Verbanck ◽  
Mathias Polfliet ◽  
Daniel Schuermans ◽  
Bart Ilsen ◽  
Johan de Mey ◽  
...  
Keyword(s):  
Computer Tomography ◽  
Response Mapping ◽  
Lung Structure ◽  
Lung Expansion ◽  
Peripheral Structure ◽  
Peripheral Lung ◽  
Ventilation Heterogeneity ◽  
Multiple Breath Washout ◽  
Parametric Response

A head-on comparison between imaging and multiple breath washout in supine smokers shows that computer tomography-measured unequal local lung expansion accounts for 50% or less of smoking-induced increase in ventilation heterogeneity. The contributions from unequal lung expansion and peripheral structure to the two main washout indices also explain their respective association with parametric response mapping indices.

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