14,045 research outputs found

    Evaluation of EREP techniques for geological mapping

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    The author has identified the following significant results. Skylab photographs may be successfully utilized for preparing a reconnaissance geological map in the areas where no maps or semi-detailed maps exist. Large coverage of area and regional perspective from Skylab photographs can help better coordination in regional mapping. It is possible to delineate major structural trends and other features like mega-lineaments, geofractures, and faults, which have evaded their detection by conventional methods. The photointerpretability is better in areas dominated by sedimentary rocks. Rock units of smaller extent and having poor geomorphic expressions are difficult to map. Demarcation of quaternary river alluvium can be made with better precision and ease with the Skylab photographs. Stereoscopic viewing greatly helps in interpretation of area structures. Skylab photographs are not good for preparing geological maps larger than 1:270,000 scale

    Interpolation function of the genocchi type polynomials

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    The main purpose of this paper is to construct not only generating functions of the new approach Genocchi type numbers and polynomials but also interpolation function of these numbers and polynomials which are related to a, b, c arbitrary positive real parameters. We prove multiplication theorem of these polynomials. Furthermore, we give some identities and applications associated with these numbers, polynomials and their interpolation functions.Comment: 14 page

    Quasideuterons in Light Nuclei

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    The role of pairing correlations for nucleon pairs with isospin T=1T=1 and T=0T=0 is investigated for nuclei in the mass region 12≤A≤4212 \leq A \leq 42. For that purpose the two-nucleon densities resulting from nuclear shell-model calculations in one and two major shells are analyzed. Significant effects on the resulting energies are observed due to the formation of T=0T=0 pairs. The formation of quasi-deuterons is maximal for symmetric nuclei with N=ZN=Z. The formation of T=0T=0 pairs is less sensitive to the density of single-particle states close to the Fermi energy than the T=1T=1 pairing and is relevant also for excitations across shell-closures. This robustness also explains why T=0T=0 pairing does not lead to such a clear evidence in comparing energies of neighbored nuclei as the "odd-even mass staggering" due to the formation of T=1T=1 pairing.Comment: 8 pages, 5 figur

    Excitation of the Lowest Autoionizing Levels in Lithiumlike Ions by Electron Impact

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    We present theoretical, differential, and total cross sections for electron impact excitation of the lowest autoionizing levels of various lithiumlike ions (viz., Be+, B2+, C3+, O5+, and Ne7+). For these ions, the autoionizing level of interest results from excitation of an inner-shell electron. A distorted-wave Born approximation (with exchange) is used for the calculation. The present results are compared with previous theoretical calculations and it is concluded that the Coulomb-Born approach is unreliable, particularly near threshold

    Uniqueness of nontrivially complete monotonicity for a class of functions involving polygamma functions

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    For m,n∈Nm,n\in\mathbb{N}, let fm,n(x)=[ψ(m)(x)]2+ψ(n)(x)f_{m,n}(x)=\bigr[\psi^{(m)}(x)\bigl]^2+\psi^{(n)}(x) on (0,∞)(0,\infty). In the present paper, we prove using two methods that, among all fm,n(x)f_{m,n}(x) for m,n∈Nm,n\in\mathbb{N}, only f1,2(x)f_{1,2}(x) is nontrivially completely monotonic on (0,∞)(0,\infty). Accurately, the functions f1,2(x)f_{1,2}(x) and fm,2n−1(x)f_{m,2n-1}(x) are completely monotonic on (0,∞)(0,\infty), but the functions fm,2n(x)f_{m,2n}(x) for (m,n)≠(1,1)(m,n)\ne(1,1) are not monotonic and does not keep the same sign on (0,∞)(0,\infty).Comment: 9 page

    Energy Dependence of Short and Long-Range Multiplicity Correlations in Au+Au Collisions from STAR

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    A general overview of the measurement of long-range multiplicity correlations measured by the STAR experiment in Au+Au collisions at RHIC is presented. The presence of long-range correlations can provide insight into the early stages, and the type of matter produced in, these collisions. These measurements have been made in Au+Au collisions at sNN\sqrt{s_{NN}} = 200 and 62.4 GeV. These results indicate a relatively large long-range correlation is produced in Au+Au collisions compared to a {\it pp} baseline at sNN\sqrt{s_{NN}} = 200 GeV. A weaker long-range correlation is seen as a function of incident energy. Further, comparison of the onset of the long-range correlation to the calculated percolation density parameter at sNN\sqrt{s_{NN}} = 200 GeV is presented.Comment: 8 pages, 6 figures, Conference Proceedings for the XI International Workshop on Correlation and Fluctuation in Multiparticle Production, Hangzhou, China, November 21-25, 200

    Information Systems (IS) Discipline Identity: A Review and Framework

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    The recent debate about crisis in the Information Systems (IS) discipline is largely attributed to its having a fluid discipline identity. Myriad conceptualizations of IS discipline identity have resulted in a plethora of unstructured and disconnected recommendations for the survival and growth of the IS field. It is therefore essential to have a theoretical framework which explains: What is IS discipline identity? In this study, we address this void in the identity literature. By extending and borrowing from the concepts of organizational and self-identity, we propose a theoretical framework for discipline identity and explicate its dimensions with respect to the IS discipline. The three contextual questions of discipline identity about purpose, period, and place set the stage for an in-depth inquiry of the three constitutive questions (or dimensions): periphery, perspective, and process, to provide a holistic framework for conceptualizing IS discipline identity. Further, we conceptualize IS discipline identity process as consisting of four recursive and iterative sub-processes: copy, consolidate, differentiate, and demonstrate (CCDD). We posit that an iterative hermeneutic focus on these four sub-processes is vital for the health of the discipline and neglecting even one of them will lead to an imbalanced identity structure. Through this paper, we seek to stimulate and further the ongoing debate on the topic
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