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Comparative study of tensile mechanic properties of high-strength and common polyethylene twisted netting for fishing

SHI Jian-gao,WANG Lu-min,

海洋科学 , 2007,
Abstract: To furnish reference to deep water sea cage designing and fishing materials selecting, this experiment investigated the differences in tensile properties obtained applying the ISO1806-2002 standard, GB/T4925-1985 national standard, to the high-strength polyethylene twisted netting (HSPE twisted netting) and common polyethylene twisted netting (PE twisted netting) for fishing. The results are as follows: (1) Under the same condition, the 36-ply HSPE twisted netting is 3.1% and 3.7% higher than 52-ply PE twisted netting in breaking strength of mesh joint and breaking strength per twine of netting, while in diameter of bar and drag of netting, the former is 19.6% smaller than the latter. (2) The netting strength (including breaking strength of mesh joint and breaking strength per twine of netting) was obtained by applying the ISO1806-2002 standard, SC110-1983 trade standard and the related references to the HSPE and PE twisted netting respectively, and reproducibility tests on netting strength were done as well. The standard deviations of breaking strength of mesh joint of HSPE twisted netting and PE twisted netting are 35.93N and 25.61N respectively; the standard deviations of the reproducibility tests of breaking strength of mesh joint of HSPE twisted netting and PE twisted netting are 31.07N and 36.93N respectively. The standard deviations of breaking strength per twine of netting of HSPE twisted netting and PE twisted netting are 19.91N and 13.49N respectively; the standard deviations of the reproducibility tests of breaking strength per twine of netting of HSPE twisted netting and PE twisted netting are 20.48N and 15.49N respectively; variations of the testing results on netting strength are less than 4%. This means, under the condition of repeat or reproducibility, variation of the testing results are quite small either. (3) The 36-ply HSPE twisted netting is 38.9% smaller than 52-ply PE twisted netting in cost, it is feasible for us to apply the HSPE twisted netting. (4) As a standard, there are some shortcomings in the GB/T4925 obviously, if applied to twisted netting; this suggests that the national organization for fisheries standardization should prepare a modification to GB/T4925.
Solidity of Viscous Liquids  [PDF]
Jeppe C. Dyre
Physics , 1998, DOI: 10.1103/PhysRevE.59.2458
Abstract: Recent NMR experiments on supercooled toluene and glycerol by Hinze and Bohmer show that small rotation angles dominate with only few large molecular rotations. These results are here interpreted by assuming that viscous liquids are solid-like on short length scales. A characteristic length, the "solidity length", separates solid-like behavior from liquid-like behavior.
A Knotless Technique for Kidney Transplantation in the Mouse
Song Rong,Alfor G. Lewis,Uta Kunter,Hermann Haller,Faikah Gueler
Journal of Transplantation , 2012, DOI: 10.1155/2012/127215
Abstract: Mouse models of kidney transplantation are important to study molecular mechanisms of organ transplant rejection as well as to develop new therapeutic strategies aimed at improving allograft survival. However, the surgical technique necessary to result in a viable allograft has traditionally proven to be complex and very demanding. Here, we introduce a new, simple, and rapid knotless technique for vessel anastomosis wherein the last stitch of the anastomosis is not tied to the short end of the upper tie as in the classical approach but is left free. This is a critical difference in that it allows the size of the anastomosis to be increased or decreased after graft reperfusion in order to avoid stenosis or bleeding, respectively. We compared the outcome of this new knotless technique (=175) with the classical approach (=122) in terms of local thrombosis or bleeding, time for anastomosis, and survival rates. By this modification of the suture technique, local thrombosis was significantly reduced (1.1% versus 6.6%), anastomosis time was less, and highly reproducible kidney graft survival was achieved (95% versus 84% with the classical approach). We believe that this knotless technique is easy to learn and will improve the success rates in the technically demanding model of mouse kidney transplantation.
Solidity and some double sequence spaces  [cached]
Boletim da Sociedade Paranaense de Matemática , 2012,
Abstract: In this paper we investigate the solidity (normality) of the sequencespaces c_A^2, l_A^2, Lambda_a^2 and Gamma_A^2.
Early pullout of lateral row knotless anchor in rotator cuff repair  [cached]
Tsiouri Chrysi,Mok Daniel
International Journal of Shoulder Surgery , 2009,
Abstract: Use of lateral row anchors in rotator cuff repair as a means of enhancing the strength of the repair; and improving footprint tendon contact, thus promoting healing, is becoming more popular in current arthroscopic practice. In our knowledge, failures of lateral row knotless anchors have not yet been reported. We present a case of double row rotator cuff repair using a Swivelock anchor (Arthrex) as a lateral row anchor that failed two weeks after surgery.
Simulation for Evolution of the Australian Netting Spider PM Eye  [PDF]
Vernon Williams
Quantitative Biology , 2011,
Abstract: This paper reports on a simulated evolution project, which had the goal of simulating the refractive components of the PM eye of Australian netting spider diopis subrufus on a desktop computer. The model for the simulation is the anatomy of the eye described by Blest and Land [Ble & Lan 1977]. The evolution simulation was able to produce hundreds of eyes with equivalent optical qualities to the measured eyes for the phenotype of the netting spider. These artificially evolved eyes began to occur in the computer simulation between 8X106 and 35X106 cycles after Demonstration of Darwinian Theory of Evolution; arXiv 1006.0480 simulated the evolution for the ctenid spider PM eye, cupiennius sale. This paper follows the previous paper, but the netting spider eye is more complex than the ctenid PM eye so the simulated evolution equations are more complex.
Spin Superfluidity versus Solidity of Ultracold Polar Molecules  [PDF]
Hongyi Yu,W. M. Liu,Chaohong Lee
Physics , 2009,
Abstract: We present a technique for engineering quantum magnets via ultracold polar molecules in optical lattices and explore exotic interplay between its spin superfluidity and solidity. The molecular ground and first excited rotational states are resonantly coupled by a linearly polarized microwave field. The spin-up (spin-down) states are presented by molecular rotational states of electric dipole moment along (against) the coupling field. By controlling the angle between the lattice direction and the coupling field, the inter-site interaction can be tuned from antiferromagnetic to ferromagnetic. Furthermore, the dipole-dipole interaction induces an exotic interplay between spin superfluidity and solidity, and spin supersolid phases may appear in mediate regions.
Solidity of viscous liquids. III. Alpha relaxation  [PDF]
Jeppe C. Dyre
Physics , 2003, DOI: 10.1103/PhysRevE.72.011501
Abstract: It is suggested that the $\omega^{-1/2}$ high-frequency decay of the alpha loss in highly viscous liquids, which appears to be generic, is a manifestation of a negative long-time tail as typically encountered in stochastic dynamics. The proposed mechanism requires that the coherent diffusion constant is much larger than estimated from the alpha relaxation time. This is justified by reference to the solidity of viscous liquids in an argument which, by utilizing the irrelevance of momentum conservation at high viscosity and introducing a center of mass diffusion constant, implies that at high viscosity the coherent diffusion constant is much larger than the incoherent diffusion constant.
Risk Factors for Recurrent Shoulder Dislocation Arthroscopically Managed with Absorbable Knotless Anchors  [PDF]
Raffaele Russo,Fabio Cautiero,Giuseppe Della Rotonda
Advances in Orthopedic Surgery , 2014, DOI: 10.1155/2014/964358
Abstract: Purpose. To evaluate the clinical outcome and risk factors for recurrent dislocation after arthroscopic stabilization with absorbable knotless anchor. Methods. We treated 197 patients affected by anterior shoulder instability, either traumatic or atraumatic with the same arthroscopic suture technique. We recorded age at surgery and number and type of dislocations (traumatic/atraumatic). Of the 197 patients, 127 (65.4%) were examined with a mean follow-up of 5.6 years (range: 25–108 months). Eighty-one shoulders were evaluated with the Rowe score and 48 with the Simple Shoulder Test (SST). Results. The mean Rowe score was 90.8, while the mean SST score was 10.9. Recurrence occurred in 10 cases (7.7%) but only in 4 cases was atraumatic, which reduces the real recurrence rate to 3.1%. Patients with recurrence were significantly younger at surgery than patients who did not relapse (). Moreover, neither the number () nor the type of shoulder instability (), or the amount of glenoid bone loss () significantly affected the probability of recurrence. Conclusions. In a patient population with involuntary monodirectional anterior shoulder instability, use of absorbable knotless anchor was reliable and resulted in a good outcome. In this series the statistical significant risk factors for recurrent dislocation were age of patient. 1. Introduction Unidirectional shoulder instability is a very frequent condition that generally responds well to arthroscopic surgery. However, arthroscopic procedures can fail due to such factors as patient age [1], number of previous dislocations and rehabilitation program [2], chondral and bone defects [3], sports activity [4], insufficient soft-tissue tensioning [5], failure of surgical devices [6], and bone quality [7]. Very little is known about risk factors associated with recurrence of shoulder instability after arthroscopic treatment. There appears to be no statistically significant differences in outcome using absorbable versus non absorbable sutures [8]. However, severe osteoarthritis has been associated with metal anchors [9]. Other complications have been reported in patients treated with bioknotless anchors. Athwal et al. [10] reported four failures that led to destructive glenoid osteolysis, anchor pull-out, and subsequent severe damage of the articular surface. Barber [11] described 2 failures: one due to rapid degradation of the suture anchor; the other because the upper part of the anchor and a portion of the eyelet became loose bodies as the anchor absorbed. Freehill et al. [12] reported synovitis, implant debris, and
Solidity of viscous liquids. IV. Density fluctuations  [PDF]
Jeppe C. Dyre
Physics , 2006, DOI: 10.1103/PhysRevE.74.021502
Abstract: This paper is the fourth in a series exploring the physical consequences of the solidity of highly viscous liquids. It is argued that the two basic characteristics of a flow event (a jump between two energy minima in configuration space) are the local density change and the sum of all particle displacements. Based on this it is proposed that density fluctuations are described by a time-dependent Ginzburg-Landau equation with rates in k-space of the form $\Gamma_0+Dk^2$ with $D\gg\Gamma_0a^2$ where $a$ is the average intermolecular distance. The inequality expresses a long-wavelength dominance of the dynamics which implies that the Hamiltonian (free energy) may be taken to be ultra local. As an illustration of the theory the case with the simplest non-trivial Hamiltonian is solved to second order in the Gaussian approximation, where it predicts an asymmetric frequency dependence of the isothermal bulk modulus with Debye behavior at low frequencies and an $\omega^{-1/2}$ decay of the loss at high frequencies. Finally, a general formalism for the description of viscous liquid dynamics, which supplements the density dynamics by including stress fields, a potential energy field, and molecular orientational fields, is proposed.
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