56 research outputs found

    Field-Driven Hysteresis of the d=3 Ising Spin Glass: Hard-Spin Mean-Field Theory

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    Hysteresis loops are obtained in the Ising spin-glass phase in d=3, using frustration-conserving hard-spin mean-field theory. The system is driven by a time-dependent random magnetic field H_Q that is conjugate to the spin-glass order Q, yielding a field-driven first-order phase transition through the spin-glass phase. The hysteresis loop area A of the Q-H_Q curve scales with respect to the sweep rate h of magnetic field as A-A_0 = h^b. In the spin-glass and random-bond ferromagnetic phases, the sweep-rate scaling exponent b changes with temperature T, but appears not to change with antiferromagnetic bond concentration p. By contrast, in the pure ferromagnetic phase, b does not depend on T and has a sharply different value than in the two other phases.Comment: 5 pages, 8 figures, 1 table. Replaced with published versio

    Phase Diagrams and Crossover in Spatially Anisotropic d=3 Ising, XY Magnetic and Percolation Systems: Exact Renormalization-Group Solutions of Hierarchical Models

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    Hierarchical lattices that constitute spatially anisotropic systems are introduced. These lattices provide exact solutions for hierarchical models and, simultaneously, approximate solutions for uniaxially or fully anisotropic d=3 physical models. The global phase diagrams, with d=2 and d=1 to d=3 crossovers, are obtained for Ising, XY magnetic models and percolation systems, including crossovers from algebraic order to true long-range order.Comment: 7 pages, 12 figures. Corrected typos, added publication informatio

    Measuring cross-lingual semantic similarity across european languages

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    This paper studies cross-lingual semantic similarity (CLSS) between five European languages (i.e. English, French, German, Spanish and Italian) via unsupervised word embeddings from a cross-lingual lexicon. The vocabulary in each language is projected onto a separate high-dimensional vector space, and these vector spaces are then compared using several different distance measures (i.e., correlation, cosine etc.) to measure their pairwise semantic similarities between these languages. A substantial degree of similarity is observed between the vector spaces learned from corpora of the European languages. Null hypothesis testing and bootstrap methods (by resampling without replacement) are utilized to verify the results. © 2017 IEEE

    The HELLP syndrome: Clinical issues and management. A Review

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    <p>Abstract</p> <p>Background</p> <p>The HELLP syndrome is a serious complication in pregnancy characterized by haemolysis, elevated liver enzymes and low platelet count occurring in 0.5 to 0.9% of all pregnancies and in 10–20% of cases with severe preeclampsia. The present review highlights occurrence, diagnosis, complications, surveillance, corticosteroid treatment, mode of delivery and risk of recurrence.</p> <p>Methods</p> <p>Clinical reports and reviews published between 2000 and 2008 were screened using Pub Med and Cochrane databases.</p> <p>Results and conclusion</p> <p>About 70% of the cases develop before delivery, the majority between the 27th and 37th gestational weeks; the remainder within 48 hours after delivery. The HELLP syndrome may be complete or incomplete. In the Tennessee Classification System diagnostic criteria for HELLP are haemolysis with increased LDH (> 600 U/L), AST (≥ 70 U/L), and platelets < 100·10<sup>9</sup>/L. The Mississippi Triple-class HELLP System further classifies the disorder by the nadir platelet counts. The syndrome is a progressive condition and serious complications are frequent. Conservative treatment (≥ 48 hours) is controversial but may be considered in selected cases < 34 weeks' gestation. Delivery is indicated if the HELLP syndrome occurs after the 34th gestational week or the foetal and/or maternal conditions deteriorate. Vaginal delivery is preferable. If the cervix is unfavourable, it is reasonable to induce cervical ripening and then labour. In gestational ages between 24 and 34 weeks most authors prefer a single course of corticosteroid therapy for foetal lung maturation, either 2 doses of 12 mg betamethasone 24 hours apart or 6 mg or dexamethasone 12 hours apart before delivery. Standard corticosteroid treatment is, however, of uncertain clinical value in the maternal HELLP syndrome. High-dose treatment and repeated doses should be avoided for fear of long-term adverse effects on the foetal brain. Before 34 weeks' gestation, delivery should be performed if the maternal condition worsens or signs of intrauterine foetal distress occur. Blood pressure should be kept below 155/105 mmHg. Close surveillance of the mother should be continued for at least 48 hours after delivery.</p

    Kuzey Adana Havzasındaki tarım dışı arazilerin toprak endüstrisi yönünden kullanımı

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    TEZ2876Tez (Yüksek Lisans) -- Çukurova Üniversitesi, Adana, 1998.Kaynakça (s. 59-65) var.vi, 65 s. ; 30 cm.

    Synthesis and characterization of metal complexes of acebutolol, atenolol, and propranolol antihypertension drugs

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    The complexation of two transition metal ions with the ß-blocker drugs acebutolol (HL1), atenolol (HL2), and propranolol (HL3) was studied in methanol and acetonitrile media at M:L (metal:ligand) molar ratio from 1:1 to 1:10. Cu(II) complexes with ligands having the stoichiometric ratio 1:4 (mononuclear copper(II) complexes) and 1:1 (binuclear copper(II) complexes) were prepared. The analytical data show that the metal to ligand ratio in the mononuclear Co(II) complexes was 1:2. The complexes were characterized on the basis of analytical data, magnetic moments, atomic absorption, infrared and electronic spectral data. Molar conductivities of the complexes at room temperature were measured. The conductivity values of the mononuclear Cu(II) complexes indicate weak electrolyte behavior, whereas the binuclear Cu(II) and mononuclear Co(II) complexes are non-electrolytes. The thermal properties of all complexes have been studied by the DTA and TG.01.02.2001The authors gratefully acknowledge the funding of this work by the Research Fund (Project No: 2001/2-1) of Kahramanmaras¸ Sütc¸ü 'mam University, Kahramanmaras¸, Turkey. They also greatly thank Prof. Dr. Nevzat Külcü and his assistants (University of Mersin, Faculty of Science and Arts, Department of Chemistry, Mersin, Turkey) for DTA-TG analyses

    Effects of counseling on some care outcomes among patients with brain tumour: Pain, seizure, constipation, infection, dispatch conditions [Danişmanlik veri·len beyi·n tümörlü hastalarin bazi bakim sonuçlari: Agri, epi·lepti·k nöbet, konsti·pasyon, i·nfeksi·yon, sevk durumlari]

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    • Objective: The aim of this study was to determine effects of training on some care outcomes among patients with brain tumour. • Material and Method: There were 45 patients in both Group I and Group II (total, 90 people). Group I received training on a one-to-one basis and were given information .Group II were given a booklet for training. All patients were observed before operations and one, three and six months after operations. Data were collected with sociodemographic features, Pre-/Post-operative Symptom Diagnosis and Intervention Form. Data between two groups were tested Chi-squared test, variance analysis for repeated measurements, Cochran's Q. • Results: There was a significant difference among headache, infection, constipation (p0.05). Patients found to have such symptoms as being overweight, iron deficiency anemia, increased blood sugar levels, increased blood pressure, respiratory distress, neurological symptoms of difficulty in swallowing, alterations in consciousness, dizziness and loss of balance edema, wound infections, fear of brain tumours, sleeplessness, restlessness, lack of satisfaction with life and itching and increased SGPT due to the antiepileptic drug phenytoin sodium were referred to specialists during the follow-up. Patients have got anxiety, depression with physical symptoms. They give information about sexuality, alternative treatment, follow-up visits, fears. • Conclusion: This study was determined physical, psychological symptoms of patients with brain tumour . Care outcomes were significantly better in Group I than in Group II
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