139 research outputs found

    Tangle Floer homology and cobordisms between tangles

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    We introduce a generalization of oriented tangles, which are still called tangles, so that they are in one-to-one correspondence with the sutured manifolds. We define cobordisms between sutured manifolds (tangles) by generalizing cobordisms between oriented tangles. For every commutative algebra A over Z/2Z, we define A-Tangles to be the category consisting of A-tangles, which are balanced tangles with A-colorings of the tangle strands and fixed SpinC structures, and A-cobordisms as morphisms. An A-cobordism is a cobordism with a compatible A-coloring and an affine set of SpinC structures. Associated with every A-module M we construct a functor HFMHF^M from A-Tangles to A-Modules, called the tangle Floer homology functor, where A-Modules denotes the the category of A-modules and A-homomorphisms between them. Moreover, for any A-tangle T the A-module HFM(T)HF^M(T) is the extension of sutured Floer homology defined in an earlier work of the authors. In particular, this construction generalizes the 4-manifold invariants of Ozsvath and Szabo. Moreover, applying the above machinery to decorated cobordisms between links, we get functorial maps on link Floer homology

    The relationship of individual accountability with job stress and work deviant behavior among nurses

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    Background and aims: Individual accountability and its positive and negative effectiveness are the most challenges of organization subjects. The root of some medical staffs' behaviors and activities is individual accountability. So, the present paper was conducted with the aim of identifying the relationship between individual accountability with job stress and work deviant behavior with mediating role of personality trait of conscientiousness. Methods: In this descriptive-analytic study, 175 employee nurses of Ayatollah Kashani and Hajar hospitals were entered in this research in 2014. Data were collected using Hochwarter, Casta, Mackgor, Mulkr, Robinson and Bennett, and House and Rizzo standard questionnaires. The structural equations model was used to study the relationship between Latent variables and the measured ones in conceptual model. Results: The results indicated that there is a significant positive correlation between the perception of individual accountability and personality trait of conscientiousness (P 0.05 and r = - 0.26, r = - 0.36). Conclusion: According to the present theoretical and research foundations at hand, individual accountability directly affects job stress and work deviant behavior among employees, and on the basis of the findings of the present study conscientiousness bears a significant negative causal effect on job stress and work deviant behavior. It is concluded that conscientiousness decreases the negative causal and potential effect of accountability on stress and work deviant behavior

    Application of superconducting coils to the NASA prototype magnetic balance

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    Application of superconducting coils to a general purpose magnetic balance was studied. The most suitable currently available superconducting cable for coils appears to be a bundle of many fine wires which are transposed and are mechanically confined. Sample coils were tested at central fields up to .5 Tesla, slewing rates up to 53 Tesla/ sec and frequencies up to 30 Hz. The ac losses were measured from helium boil-off and were approximately 20% higher than those calculated. Losses were dominated by hysteresis and a model for loss calculation which appears suitable for design purposes is presented along with computer listings. Combinations of two coils were also tested and interaction losses are reported. Two feasible geometries are also presented for prototype magnetic balance using superconductors

    Does sentence structure boost early word learning?:An artifical language learning study

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    This paper examines the semantic consequences of the presence and absence of the verbal particle in Hungarian sentences containing a verb of creation. Since these verbs are Definiteness-Effect verbs, the aspectual interpretation does not depend merely on the verbal particle’s position – or even presence – in the sentence, as in other cases, but rather on the specific/non-specific interpretation of the object. The main claim of the paper is that the verbal particle’s role in such sentences can be defined in terms of collectivity and distributivity: the Definiteness-Effect constructions – the ones without verbal particle – can only refer to collective events, and the non-Definiteness-Effect-constructions – the ones containing a verbal particle – can refer to both collective and distributive events

    The first report on epicardial cavernous hemangioma in farmed sturgeon, Acipenser baerii, a microscopic survey

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    Haemangioma is a benign tumor of vascular endothelial cells or their progenitors. This tumor is common in dogs and rare in cats, horses and other domestic animals (Goldschmidt and Hendrick, 2002). In dogs, hemangiomas are typically benign and solitary those are often formed in the dermis of the skin, while hemangiosarcomas are regularly present as disseminated tumors that involve the spleen, heart, lung, liver, soft tissues of the trunk and extremities (Brown, 1985)

    Sensitive and Accurate Dispersion Map Extraction of HNLFs by Frequency Tuning of a Degenerate FWM

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    A sensitive and accurate method for dispersion map extraction along an arbitrarily profiled highly nonlinear fiber (HNLF) is proposed. High sensitivity is achieved by positioning the wavelength of a signal at the band edge of the modulation instability (MI) spectrum generated by an intense degenerate four wave mixing (FWM) pump. In doing so, the to-be-extracted dispersion fluctuations leave a more drastic effect on the FWM-generated power since they either inflate or deflate theMI spectrum. The accuracy of the method is increased by monitoring the distribution of power along the fiber. Once the power distribution is measured along the fiber, dispersion map of the HNLF is extracted using an appropriate inverse algorithm, which reconstructs the dispersion with a highlevel ofaccuracy.

    Effect of chitosan diet on intestinal histology, body composition and salinity and thermal stresses resistance in Caspian kutum (Rutilus frisii kutum, Kamenskii 1901) fingerlings

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    This study was conducted to evaluate the effect of the chitosan diet on the intestinal histology, body composition and resistance towards salinity and thermal stresses in Caspian kutum (Rutilus frisii kutum) fingerlings. This research, using a completely random design, consisted of 0.25, 0.5, 1, and 2 g levels of chitosan per kg for each commercial diet of the Caspian kutum in three repetitions. The Kutum fingerlings, with an average weight of 1.76 ± 0.15 g, were fed with the experimental diets for 8 weeks. At the end of the experiment, tissue sections were prepared by cutting 5mm-thick samples from the intestines of the fish. To evaluate the resistance to salinity and thermal stresses, the fingerlings were exposed to a salinity stress of 11 ppt and 13 ppt and temperatures of 30 °C and 34 °C, after which the survival rate was calculated. Microscopic observations showed that the intestinal villi height in the fish fed with the diet containing 1 g kg-1 of chitosan significantly increased to 319.93 µm compared to the control group (P0.05). Fish survival rate after 11 ppt and 13 ppt salinity stress showed no statistically significant difference (P>0.05), but the survival rate of the fish fed with the diet containing 1g kg1 of chitosan after experiencing the 34 °C thermal stress significantly increased to 70% (P<0.05). The results suggest that a chitosan level of 1g kg-1 in the diet can not only affect the survival rate and resistance of kutum fingerlings against thermal stress, but can also affect the height of the intestinal villi

    The effect of isolated Lactobacillus from gut of Barbus grypus on growth performance, survival and gut microflora of common carp (Cyprinus carpio)

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    This study evaluated the impact of dietary supplementation bacteria, Lactobacillus plantarum and Lactobacillus bulgaricus isolated from the intestine of Barbus grypus on growth performance, survival and intestinal flora of common carp. For this purpose 480 common carp (average initial weight of 40 ± 6g) were randomly divided to 4 treatments (with three replications) and fed with diet containing 5×107 CFU/g L.plantarum (Group 1), L.bulgaricus (Group 2), Lactobacillus casei (Group3) and a diet without probiotic supplementation (As control group) for 60 days. To evaluate the persistent of the bacteria in digestive system, from the 60 th day to75 th day, experimental fish were fed with diet without probiotics (control). Results showed that Specific growth rate of fish fed diets containing Lactobacillus significantly higher compared with control group (p<0.05). Fish fed diets containing L.casei had significantly lower FCR than the control group on 60 th and 75 th of trial (p<0.05). The protein efficiency ratio and specific growth rate of fish fed the isolated bacteria at different times of trial was higher compared to fish fed than control diet. In general, results of intestinal micro flora assessment showed that Lactobacillus bacteria significantly increased in fish fed with dietary probiotic at 30 and 60 of trial (p<0.05) and groups 2 and 3 showed the greatest amount of Lactobacillus compared to the control group after 30 days of feeding. Theresults of this study showed that the addition of lactobacillus bacteria isolated from the intestines of Barbus grypus in the diet of common carp increased the beneficial micro flora population of intestinal microflora and ultimately improved growth performance and feed utilization

    Mapping Dispersion Fluctuations along Optical Fibers Using Brillouin Probing and a Fast Analytic Calculation

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    A simple analytic formula is derived to extract tiny dispersion fluctuations along highly nonlinear fibers from distributed measurements of parametric gain. A refined BOTDA scheme, suitable to track Kerr processes, enables low noise measurements
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