A rational interaction: Lower bound on the number of I‐PI graphs without tadpoles

A lower bound on the number of I‐PI connected graphs without tadpoles that will be important in the proof of the divergence of the perturbation series of a model with rational interaction is obtained.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/70857/2/JMAPAQ-32-5-1293-1.pd

Structure Demographique D’un Labeo Africain, Labeo coubie Rüppel, 1832 (Pisces: Cyprinidae), Dans Le Lac De Barrage De Taabo (Bassin Du Bandama, Côte D’ivoire)

La structure démographique de Labeo coubie a été étudiée en vue d’une gestion rationnelle du stock de poissons dans le lac Taabo. Des échantillonnages ont été effectués en juillet, octobre et décembre 2006, puis en mars et juin 2007. Les analyses ont porté sur la dynamique spatio-temporelle du sex-ratio, de la structure des tailles, des relations longueur-poids et du coefficient de condition. Le sex-ratio global a été en faveur des mâles (1,35 : 1) mais, n’a pas été significativement différent de la valeur d’équilibre. La taille moyenne des spécimens collectés en amont du lac (206,18 ± 63,55 mm LS) a été significativement plus importante (p<0,05) que celle des individus obtenus en aval (179,94 ± 56,66 mm LS). De même, la taille moyenne enregistrée pendant les mois de crue (285,28 ± 34,69 mm LS) a été largement supérieure à celle des mois de décrue (190,14 ± 61,13 mm LS), avec une croissance isométrique à l’échelle du lac (b = 2,97). Le coefficient moyen de condition obtenu dans la partie amont (3,59 ± 0,39) a été plus important (p<0,05) que celui observé dans la partie aval (2,29 ± 0,31).The demographic characteristics of Labeo coubie from lake Taabo was assessed, in order to establish the basis for a rational management of the stock of this fish. Samplings were done at different periods: in July, October and December 2006, and again in March and June 2007. Analyses were concerned with the spatiotemporal dynamics of sex-ratio, size and the structure, as well as length-weight relationships and condition factor of the fish. Results show that overall sex-ratio was in favor of males (1.35 : 1) but, it did not differ significantly from the equilibrium point. The mean size of the fish collected upper stream (206.18 ± 63.55 mm SL) was significantly higher than that from downstream (179.94 ± 56.66 mm SL) of the lake. Moreover, the mean size recorded during the inflow months (285.28 ± 34.69 mm SL) was significantly higher than that recorded during the months of low waters (190.14 ± 61.13 mm SL). Fish growth appeared isometric at the scale of the lake (b = 2.97). The average condition factor obtained upstream (3.59 ± 0.39), was higher (p<0.05) than that from downstream (2.29 ± 0.31).Keywords: Labeo coubie, demographic structure, lake Taabo, Côte d’Ivoir

ORide: A Privacy-Preserving yet Accountable Ride-Hailing Service

In recent years, ride-hailing services (RHSs) have be- come increasingly popular, serving millions of users per day. Such systems, however, raise significant privacy concerns, because service providers are able to track the precise mobility patterns of all riders and drivers. In this paper, we propose ORide (Oblivious Ride), a privacy- preserving RHS based on somewhat-homomorphic en- cryption with optimizations such as ciphertext packing and transformed processing. With ORide, a service provider can match riders and drivers without learning their identities or location information. ORide offers rid- ers with fairly large anonymity sets (e.g., several thou- sands), even in sparsely populated areas. In addition, ORide supports key RHS features such as easy payment, reputation scores, accountability, and retrieval of lost items. Using real data-sets that consist of millions of rides, we show that the computational and network over- head introduced by ORide is acceptable. For example, ORide adds only several milliseconds to ride-hailing op- erations, and the extra driving distance for a driver is less than 0.5 km in more than 75% of the cases evaluated. In short, we show that a RHS can offer strong privacy guar- antees to both riders and drivers while maintaining the convenience of its services

Polymers in Curved Boxes

We apply results derived in other contexts for the spectrum of the Laplace operator in curved geometries to the study of an ideal polymer chain confined to a spherical annulus in arbitrary space dimension D and conclude that the free energy compared to its value for an uncurved box of the same thickness and volume, is lower when $D < 3$, stays the same when $D = 3$, and is higher when \mbox{$D > 3$}. Thus confining an ideal polymer chain to a cylindrical shell, lowers the effective bending elasticity of the walls, and might induce spontaneous symmetry breaking, i.e. bending. (Actually, the above mentioned results show that {\em {any}} shell in $D = 3$ induces this effect, except for a spherical shell). We compute the contribution of this effect to the bending rigidities in the Helfrich free energy expression.Comment: 20 pages RevTeX, epsf; 4 figures; submitted to Macromoledule

Teste de inibição da enzima acetilcolinesterase de compostos organofosforados com potencial ação fungicida na cultura de mamão (Carica papaya L.).

bitstream/item/75000/1/pub-203.pd

Síntese de compostos organofosforados com potencial ação fungicida na cultura de mamão (Carica papaya L.).

bitstream/item/156623/1/CT157-organofosforados-Henriqueta.pd

Lung Cancer: A Classic Example of Tumor Escape and Progression While Providing Opportunities for Immunological Intervention

Lung cancers remain one of the most common and deadly cancers in the world today (12.5% of newly diagnosed cancers) despite current advances in chemo- and radiation therapies. Often, by the time these tumors are diagnosed, they have already metastasized. These tumors demonstrate the classic hallmarks of cancer in that they have advanced defensive strategies allowing them to escape various standard oncological treatments. Immunotherapy is making inroads towards effectively treating other fatal cancers, such as melanoma, glioblastoma multiforme, and castrate-resistant prostate cancers. This paper will cover the escape mechanisms of bronchogenic lung cancer that must be overcome before they can be successfully treated. We also review the history of immunotherapy directed towards lung cancers

py4DSTEM: a software package for multimodal analysis of four-dimensional scanning transmission electron microscopy datasets

Scanning transmission electron microscopy (STEM) allows for imaging, diffraction, and spectroscopy of materials on length scales ranging from microns to atoms. By using a high-speed, direct electron detector, it is now possible to record a full 2D image of the diffracted electron beam at each probe position, typically a 2D grid of probe positions. These 4D-STEM datasets are rich in information, including signatures of the local structure, orientation, deformation, electromagnetic fields and other sample-dependent properties. However, extracting this information requires complex analysis pipelines, from data wrangling to calibration to analysis to visualization, all while maintaining robustness against imaging distortions and artifacts. In this paper, we present py4DSTEM, an analysis toolkit for measuring material properties from 4D-STEM datasets, written in the Python language and released with an open source license. We describe the algorithmic steps for dataset calibration and various 4D-STEM property measurements in detail, and present results from several experimental datasets. We have also implemented a simple and universal file format appropriate for electron microscopy data in py4DSTEM, which uses the open source HDF5 standard. We hope this tool will benefit the research community, helps to move the developing standards for data and computational methods in electron microscopy, and invite the community to contribute to this ongoing, fully open-source project

Combined effect of bumetanide, bromide, and GABAergic agonists: An alternative treatment for intractable seizures

Univ Fed Sao Joao del Rei, Lab Neurociencia Expt & Computac, Programa Inst Bioengn, Sao Joao Del Rei, BrazilUniversidade Federal de São Paulo, Escola Paulista Med, Dept Expt Neurol, São Paulo, BrazilUniversidade Federal de São Paulo, Escola Paulista Med, Dept Fisiol, São Paulo, BrazilPontificia Univ Catolica Rio Grande do Su, Inst Cerebro, Porto Alegre, RS, BrazilUniversidade Federal de São Paulo, Escola Paulista Med, Dept Expt Neurol, São Paulo, BrazilUniversidade Federal de São Paulo, Escola Paulista Med, Dept Fisiol, São Paulo, BrazilWeb of Scienc