448 research outputs found
Sürgősségi császármetszés szén-monoxid-mérgezésben
Recognition of carbon monoxide is difficult due to its plain physical-chemical properties. Carbon and gas operating heating systems may cause severe poisoning. Carbon-monoxide intoxication may generate severe hypoxic damage and it may cause death. The authors present the case of severe carbon monoxide poisoning affecting one young child and five adults, including a pregnant woman. Because the availability of hyperbaric oxygen therapy is limited in Hungary, urgent cesarean section was performed to avoid intrauterine hypoxic damage. The authors note that there are no standardized non-invasive methods for measuring fetal carbon-monoxide level and that the level of carbon monoxide accumulation is higher and the clearance is longer in the fetus than in the mother. The pathophysiology of carbon monoxide intoxication and therapeutic options in pregnancy are discussed
XBRL Usage: A Socio-Economic Perspective
eXtensible Business Reporting Language (XBRL) represents a standard format for exchanging business information which is capable of narrowing the reporting gap between public companies, regulators, and interested members of society (i.e., banks, investors, etc.). Through the use of tags, XBRL provides a standard language for reporting both financial and nonfinancial information not previously seen in the reporting environment, across different software applications. As a result, interested stakeholders can gain access to public information much more quickly and transparently than ever before. The current paper reports the corporate and regulatory usage of XBRL, as well as its potential impacts on various stakeholders. The paper also discusses the potential significant cost savings resulting from XBRL usage. Evidence indicates that worldwide XBRL usage would result in significant efficiency and data access gains to capital market participants, as well as labor unions and regulators
On the validity of the reduced Salpeter equation
We adapt a general method to solve both the full and reduced Salpeter
equations and systematically explore the conditions under which these two
equations give equivalent results in meson dynamics. The effects of constituent
mass, angular momentum state, type of interaction, and the nature of
confinement are all considered in an effort to clearly delineate the range of
validity of the reduced Salpeter approximations. We find that for
the solutions are strikingly similar for all
constituent masses. For zero angular momentum states the full and reduced
Salpeter equations give different results for small quark mass especially with
a large additive constant coordinate space potential. We also show that
corrections to heavy-light energy levels can be accurately
computed with the reduced equation.Comment: Latex (uses epsf macro), 24 pages of text, 12 postscript figures
included. Slightly revised version, to appear in Phys. Rev.
Sistem Berkas Digital untuk Berkas Penelitian di Universitas Klabat
Sistem penyimpanan hasil penelitian yang ada di Universitas Klabat (UNKLAB) merupakan sistem penyimpanan yang masih bersifat manual, dimana setiap penelitian di simpan di kantor fakultas dan di perpustakaan. Hal ini menyebabkan berkas yang ada tidak tersimpan dengan teratur dan kesulitan bagi pengguna untuk mengakses. Sehingga sangat dibutuhkan untuk dikembangkan sistem berkas digital penyimpanan berkas hasil penelitian. Sistem yang dirancang nantinya dapat menghubungkan mahasiswa dan dosen pada semua penelitaian yang ada di UNKLAB. Sistem berkas digital ini dibangun dengan menggunakan Framework CodeIgniter (CI) yang berbasis bahasa pemrograman PHP dan MySQL sebagai basisdata. Metode penelitian yang digunakan dalam pengembangan sistem berkas digital ini menggunakan metode spiral. Aplikasi sistem berkas digital memiliki kemampuan menyimpan dokumen, menampilkan isi dokumen dan multi user
On the instantaneous Bethe-Salpeter equation
We present a systematic algebraic and numerical investigation of the
instantaneous Bethe-Salpeter equation. Emphasis is placed on confining
interaction kernels of the Lorentz scalar, time component vector, and full
vector types. We explore stability of the solutions and Regge behavior for each
of these interactions, and conclude that only time component vector confinement
leads to normal Regge structure and stable solutions.Comment: Latex (uses epsf macro), 26 pages of text, 12 postscript figures
included
Large Possible retardation effects of quark confinement on the meson spectrum II
We present the results of a study of heavy-light-quark bound states in the
context of the reduced Bethe-Salpeter equation with relativistic vector and
scalar interactions. We find that satisfactory fits may also be obtained when
the retarded effect of the quark-antiquark interaction is concerned.Comment: 11 pages, RevTex, to appear in PR
Bethe--Salpeter equation in QCD
We extend to regular QCD the derivation of a confining
Bethe--Salpeter equation previously given for the simplest model of scalar QCD
in which quarks are treated as spinless particles. We start from the same
assumptions on the Wilson loop integral already adopted in the derivation of a
semirelativistic heavy quark potential. We show that, by standard
approximations, an effective meson squared mass operator can be obtained from
our BS kernel and that, from this, by expansion the
corresponding Wilson loop potential can be reobtained, spin--dependent and
velocity--dependent terms included. We also show that, on the contrary,
neglecting spin--dependent terms, relativistic flux tube model is reproduced.Comment: 23 pages, revte
Possible retardation effects of quark confinement on the meson spectrum
The reduced Bethe-Salpeter equation with scalar confinement and vector gluon
exchange is applied to quark-antiquark bound states. The so called intrinsic
flaw of Salpeter equation with static scalar confinement is investigated. The
notorious problem of narrow level spacings is found to be remedied by taking
into consideration the retardation effect of scalar confinement. Good fit for
the mass spectrum of both heavy and light quarkomium states is then obtained.Comment: 14 pages in LaTex for
Climate-driven variation in biotic interactions provides a narrow and variable window of opportunity for an insect herbivore at its ecological margin
Climate-driven geographic range shifts have been associated with transitions between dietary specialism and generalism at range margins. The mechanisms underpinning these often transient niche breadth modifications are poorly known, but utilization of novel resources likely depends on phenological synchrony between the consumer and resource. We use a climate-driven range and host shift by the butterfly Aricia agestis to test how climate-driven changes in host phenology and condition affect phenological synchrony, and consider implications for host use. Our data suggest that the perennial plant that was the primary host before range expansion is a more reliable resource than the annual Geraniaceae upon which the butterfly has become specialized in newly colonized parts of its range. In particular, climate-driven phenological variation in the novel host Geranium dissectum generates a narrow and variable 'window of opportunity' for larval productivity in summer. Therefore, although climatic change may allow species to shift hosts and colonise novel environments, specialization on phenologically limited hosts may not persist at ecological margins as climate change continues. We highlight the potential role for phenological (a)synchrony in determining lability of consumer-resource associations at range margins and the importance of considering causes of synchrony in biotic interactions when predicting range shifts. This article is part of the theme issue 'Species' ranges in the face of changing environments (Part II)'
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