Fluctuation-Induced Interactions Between Ellipsoidal Particle and Planar Substrate Immersed in Critical Medium

In our study we investigate the behaviour of the net force (NF) emerging between an ellipsoidal particle and a thick plate (slab), when the interaction takes place in a near critical fluid medium with account for the omnipresent van der Waals forces (vdWF). Here we consider the case of complete wetting of the objects surfaces by the medium, due to strong adsorbing local surface potentials, exerted by thin solid coating films. The influence of the bulk inner regions of the particle and the slab on the constituents of the fluid results in long-ranged competing dispersion potentials. As a consequence from the critical fluctuations of the medium, the system experiences an additional effective interaction, traditionally termed critical Casimir force (CCF). The forces of interest are evaluated numerically from integral expressions obtained utilizing general scaling arguments and mean-field type calculations in combination with the so-called "surface integration approach" (SIA). Within the scenario considered here, this technique is applicable if one has knowledge of the forces between two parallel semi-infinite plates, confining in between some fluctuating fluid medium characterized by its temperature $T$ and chemical potential $\mu$. It is demonstrated that for a suitable set of particle-fluid, slab-fluid, and fluid-fluid coupling parameters the competition between the effects due to the coatings and the core regions of the objects result, when one changes $T$ or $\mu$, in {\it sign change} of the NF acting between the ellipsoid and the slab.Comment: 8 pages, 2 figues. arXiv admin note: text overlap with arXiv:1702.0491

Terahertz time-domain spectroscopy of edible oils.

Chemical degradation of edible oils has been studied using conventional spectroscopic methods spanning the spectrum from ultraviolet to mid-IR. However, the possibility of morphological changes of oil molecules that can be detected at terahertz frequencies is beginning to receive some attention. Furthermore, the rapidly decreasing cost of this technology and its capability for convenient, in situ measurement of material properties, raises the possibility of monitoring oil during cooking and processing at production facilities, and more generally within the food industry. In this paper, we test the hypothesis that oil undergoes chemical and physical changes when heated above the smoke point, which can be detected in the 0.05-2 THz spectral range, measured using the conventional terahertz time-domain spectroscopy technique. The measurements demonstrate a null result in that there is no significant change in the spectra of terahertz optical parameters after heating above the smoke point for 5 min

Nonlocal Reductions of a Generalized Heisenberg Ferromagnet Equation

We study nonlocal reductions of coupled equations in $1+1$ dimensions of the Heisenberg ferromagnet type. The equations under consideration are completely integrable and have a Lax pair related to a linear bundle in pole gauge. We describe the integrable hierarchy of nonlinear equations related to our system in terms of generating operators. We present some special solutions associated with four distinct discrete eigenvalues of scattering operator. Using the Lax pair diagonalization method, we derive recurrence formulas for the conserved densities and find the first two simplest conserved densities.Comment: 14 pages. arXiv admin note: substantial text overlap with arXiv:1711.0635

Polynomial Bundles and Generalised Fourier Transforms for Integrable Equations on A.III-type Symmetric Spaces

A special class of integrable nonlinear differential equations related to A.III-type symmetric spaces and having additional reductions are analyzed via the inverse scattering method (ISM). Using the dressing method we construct two classes of soliton solutions associated with the Lax operator. Next, by using the Wronskian relations, the mapping between the potential and the minimal sets of scattering data is constructed. Furthermore, completeness relations for the 'squared solutions' (generalized exponentials) are derived. Next, expansions of the potential and its variation are obtained. This demonstrates that the interpretation of the inverse scattering method as a generalized Fourier transform holds true. Finally, the Hamiltonian structures of these generalized multi-component Heisenberg ferromagnetic (MHF) type integrable models on A.III-type symmetric spaces are briefly analyzed

Anticipation in the cognitive structure of speechreading in deaf pupils

Anticipation is one of the basic components in the cognitive structure of speechreading. In order to study the probability prediction ability, determining the skills for correct decoding and interpretation of visually perceived oral information by deaf people; an experiment has been carried out involving 91 pupils aged between 7 and 12, integrated into general education schools. Participants in the study have a hearing loss of ≥90 dB. The results obtained demonstrate a high degree of correlation between linguistic and meaningful prediction ability and children’s speechreading skills. There is also a directly proportional relationship between the chronological age of the students and the level of development of their anticipation ability

Blood pressure and hypertension in type 1 diabetes mellitus patients with long duration

Type 1 diabetes mellitus (T1DM) has significantly better prognosis which has led to increased cardio-vascular diseases (CVD) prevalence. The detection of CVD risk factors and their treatment become tasks of paramount importance. Among them, high blood pressure (BP) is a target of primary purpose. Aim: to explore the blood pressure values, the prevalence of hypertension (HTN) and its management in patients with T1DM with long duration and without overt CVD, in comparison to matched controls. Participants and methods: totally, 124 patients with T1DM were matched to 59 controls by sex, age and approximate body mass index (BMI). All participants filled in questionnaires with information on demographics, physical activity, life style, concomitant diseases, treatments, presence of complications, etc. Blood samples were taken for laboratory and biomarkers investigation. Blood pressure was measured by investigators twice and the mean of the two measurements was used. HTN was accepted using standard definitions. BP values were compared using t-test. Multiple linear regression models with dependent variable BP measures and age, sex, BMI, presence of T1DM, glycated hemoglobin levels, creatinine levels as independent variables were created. ANOVA method was used to test the interaction of sex and presence of T1DM. Results: The mean age of the participants was 43.47 ± 10.1 years, 54% were males. The mean duration of T1DM was 25.31 ± 8.2 years and the mean HbA1c was 8.42 ± 1.8% for diabetic patients. The mean blood pressure measures in T1DM groups were higher than in controls, both in males and females. The difference reached significance for SBP and pulse pressure (PP). The presence of T1DM independently affected the BP values, after adjusting for major confounders. The mean adjusted differences between T1DM and controls were 8.37 mm Hg for SBP, 4.92 mm Hg for DBP, and 5.19 mm Hg for PP (p < 0.001). HTN was significantly more frequent in T1DM patients than in controls – 54% vs. 27%, p = 0.0001, mainly due to already known hypertension. BP control was insufficient – in only 36% and 13% of the treated hypertensive participants, respectively, for BP < 140/90 and < 130/80 mm Hg. The majority of the patients with HTN were treated with combination therapy, mostly single-pill fixed dosage but 30% of the hypertensive patients with diabetes did not take antihypertensive medications. Inhibitors of the renin-angiotensin system were the preferred class of medications. Conclusions: SBP and PP were significantly higher in middle-aged patients with T1DM with long duration than their control counterparts. The presence of HTN was significantly more common in T1DM. Although treated according to the current recommendations, the control of BP was far from effective. These results show the need for constant screening of patients with T1DM for HTN and other risk factors and for more aggressive antihypertensive treatment to prevent future CVD events

Monitoring the effect of therapy on a patient with a neuroendocrine tumor of the pancreas with PET/CT, 68Ga-DOTATATE - case report

Neuroendocrine tumors (NET) are a rare diagnosis, often without symptoms or mimicking other different symptoms. Тhey are a heterogeneous group of tumors derived from neuroendocrine cells, most commonly of the gastrointestinal tract, but may originate also from other organs including the pancreas, lungs, ovaries, thyroid, pituitary, and adrenal glands (3). Due to the difficult diagnosis, NET‘s are detected at a late stage in their development, often already locally advanced or metastasized. PET/CT with 68Gallium DOTATATE proved to be an effective imaging method not only for the primary diagnosis of NET and subsequent therapeutic behavior, but also for evaluating the effect of the treatment. (1) We present a case of a positive PET/CT scan, performed with Ga-68 DOTATATE in the topical location of the tail of the pancreas after therapy with Sandostain lar

Black Sea coastal forecasting system

The Black Sea coastal nowcasting and forecasting system was built within the framework of EU FP6 ECOOP (European COastalshelf sea OPerational observing and forecasting system) project for five regions: the south-western basin along the coasts of Bulgaria and Turkey, the north-western shelf along the Romanian and Ukrainian coasts, coastal zone around of the Crimea peninsula, the north-eastern Russian coastal zone and the coastal zone of Georgia. The system operates in the real-time mode during the ECOOP project and afterwards. The forecasts include temperature, salinity and current velocity fields. Ecosystem model operates in the off-line mode near the Crimea coast

Dispersion-Independent Terahertz Classification Based on Geometric Algebra for Substance Detection

We demonstrate and validate Geometric Algebra (GA) based terahertz (THz) signal classification of various powders in tablet form of various thicknesses, and compare the results with a conventional Support Vector Machine (SVM) approach. By using geometric algebra we can perform classification independently of dispersion and hence independently of the transmission path length through the sample. In principle, it may be possible to extend the GA coordinate-free transformation to other types of pulsed signals, such as pulsed microwaves or even acoustic signals in such fields as seismology. The classifier is available for download at Github, https://github.com/swuzhousl/Shengling-zhou/blob/geometric-algebra-classifier/GAclassifier

On integrable wave interactions and Lax pairs on symmetric spaces

Multi-component generalizations of derivative nonlinear Schrödinger (DNLS) type of equations having quadratic bundle Lax pairs related to Z2-graded Lie algebras and A.III symmetric spaces are studied. The Jost solutions and the minimal set of scattering data for the case of local and nonlocal reductions are constructed. The latter lead to multi-component integrable equations with CPT-symmetry. Furthermore, the fundamental analytic solutions (FAS) are constructed and the spectral properties of the associated Lax operators are briefly discussed. The Riemann–Hilbert problem (RHP) for the multi-component generalizations of DNLS equation of Kaup–Newell (KN) and Gerdjikov–Ivanov (GI) types is derived. A modification of the dressing method is presented allowing the explicit derivation of the soliton solutions for the multi-component GI equation with both local and nonlocal reductions. It is shown that for specific choices of the reduction these solutions can have regular behavior for all finite x and t. The fundamental properties of the multi-component GI equations are briefly discussed at the end