Life of the onion not knowing up from down

The absence of the force of gravity has a negative effect on plant life. Plants grown on spacecraft have died prematurely. Tests are being made to discover whether or not electricity will compensate for the absence of gravitation. It was found that an onion under current is not subject to the force of gravity. Tremendous possibilities are opened up by these experiments

Classification of geokhod units and systems based on product cost analysis and estimation for a prototype model production

The paper considers data systematization on a new shield-type heading machine - geokhod. The target of the paper is to classify geokhod components on the basis of their technical and economical production parameters. A prototype model reveals the structure of a geokhod as an assembly unit and identifies its basic characteristics. The paper overviews the methods of product cost estimations, justifies the application of an operation-based approach for a prototype model, provides the results containing product cost data for various geokhod components and technological processes, and gives the data for a material cost structure. Taking into consideration the product cost analysis, geokhod components are classified according to their technical and economical production parameters. Moreover the paper outlines the ways of a classification application for a geokhod manufacturing techniques improvement

One-dimensional hydrogen atom with minimal length uncertainty and maximal momentum

We present exact energy eigenvalues and eigenfunctions of the one-dimensional hydrogen atom in the framework of the Generalized (Gravitational) Uncertainty Principle (GUP). This form of GUP is consistent with various theories of quantum gravity such as string theory, loop quantum gravity, black-hole physics, and doubly special relativity and implies a minimal length uncertainty and a maximal momentum. We show that the quantized energy spectrum exactly agrees with the semiclassical results.Comment: 10 pages, 1 figur

WKB approximation in deformed space with minimal length

The WKB approximation for deformed space with minimal length is considered. The Bohr-Sommerfeld quantization rule is obtained. A new interesting feature in presence of deformation is that the WKB approximation is valid for intermediate quantum numbers and can be invalid for small as well as very large quantum numbers. The correctness of the rule is verified by comparing obtained results with exact expressions for corresponding spectra.Comment: 13 pages Now it is avaible at http://stacks.iop.org/0305-4470/39/37

One dimensional Coulomb-like problem in deformed space with minimal length

Spectrum and eigenfunctions in the momentum representation for 1D Coulomb potential with deformed Heisenberg algebra leading to minimal length are found exactly. It is shown that correction due to the deformation is proportional to square root of the deformation parameter. We obtain the same spectrum using Bohr-Sommerfeld quantization condition.Comment: 11 pages, typos corrected, references adde

Возможности сфинктеросохраняющего лечения больных местно-распространенным первично-неоперабельным раком прямой кишки

The aim of this study was to compare results of sphincter-sparing operations (SSO) and abdominoperineal resections (APR) in patients  undergoing combined treatment for unresectable locally-advanced rectal cancer.Methods. During September 2007 – January 2011 59 patients were enrolled. Original treatment scheme (RF patent № 2414936) was developed including radiotherapy 40 Gy in 4 Gy fractions, capecitabine 650 mg/m2 bid per os days 1-22, oxaliplatin 50 mg/m2 iv days 3, 10, 17, local hyperthermia on days 8, 12, 15, 17, 2 applications of metronidazole 10 g/m2 per rectum in a polymeric composition. Surgery was carried out following 6–8 weeks. SSO were carried out in 36 patients, APR in 23 patients. Study endpoints included 2-year OS and DFS, local recurrence and distant metastases rate, postoperative complications rate.Results. No significant differences in survival were observed: 2-year OS was 93.2 and 85.6 % (log- rank test p = 0.157) for SSO and APR groups accordingly, 2-year DFS was 88 and 71.9 % (log-rank test p = 0.064). Four (11.1 %) patients in SSO group and 4 (17.4 %) patients in APR group (р = 0.5511) developed local recurrences, 4 (11.1 %) and 7 (30.4 %) (р = 0.1293) developed distant metastases. Postoperative complications rate was 27.8 % (n = 10) and 39.1 % (n = 9) (р = 0.5181) in SSO and APR groups accordingly.Conclusions. Sphincter-sparting surgery is justified for unresectable locally advanced rectal cancer when technically feasible

Connection Conditions and the Spectral Family under Singular Potentials

To describe a quantum system whose potential is divergent at one point, one must provide proper connection conditions for the wave functions at the singularity. Generalizing the scheme used for point interactions in one dimension, we present a set of connection conditions which are well-defined even if the wave functions and/or their derivatives are divergent at the singularity. Our generalized scheme covers the entire U(2) family of quantizations (self-adjoint Hamiltonians) admitted for the singular system. We use this scheme to examine the spectra of the Coulomb potential $V(x) = - e^2 / | x |$ and the harmonic oscillator with square inverse potential $V(x) = (m \omega^2 / 2) x^2 + g/x^2$, and thereby provide a general perspective for these models which have previously been treated with restrictive connection conditions resulting in conflicting spectra. We further show that, for any parity invariant singular potentials $V(-x) = V(x)$, the spectrum is determined solely by the eigenvalues of the characteristic matrix $U \in U(2)$.Comment: TeX, 18 page

Equivalence of Local and Separable Realizations of the Discontinuity-Inducing Contact Interaction and Its Perturbative Renormalizability

We prove that the separable and local approximations of the discontinuity-inducing zero-range interaction in one-dimensional quantum mechanics are equivalent. We further show that the interaction allows the perturbative treatment through the coupling renormalization. Keywords: one-dimensional system, generalized contact interaction, renormalization, perturbative expansion. PACS Nos: 3.65.-w, 11.10.Gh, 31.15.MdComment: ReVTeX 7pgs, doubl column, no figure, See also the website http://www.mech.kochi-tech.ac.jp/cheon

A RARE CASE OF TREATMENT POLICY FOR RECURRENT NEUROENDOCRINE CARCINOMA OF THE ANAL CANAL

A rare case of multicomponental treatment of low-differentiated anal neuroendocrine cancer is presented. By using combined treatment involving chemotherapy, local hyperthermia and radiotherapy a complete response of recurrent neuroendocrine cancer has been achieved.A review of modern methods of diagnostics and treatment of rectal neurtoendocrine tumors is presented and possibilities of modern combined treatment are discussed

Charged particle in the field an electric quadrupole in two dimensions

We obtain analytic solution of the time-independent Schrodinger equation in two dimensions for a charged particle moving in the field of an electric quadrupole. The solution is written as a series in terms of special functions that support a tridiagonal matrix representation for the angular and radial components of the wave operator. This solution is for all energies, the discrete (for bound states) as well as the continuous (for scattering states). The expansion coefficients of the wavefunction are written in terms of orthogonal polynomials satisfying three-term recursion relations. The charged particle could become bound to the quadrupole only if its moment exceeds a certain critical value.Comment: 16 pages, 2 Tables, 4 Figure