SU(2) reductions in N=4 multidimensional supersymmetric mechanics

We perform an su(2) Hamiltonian reduction in the bosonic sector of the su(2)-invariant action for two free (4, 4, 0) supermultiplets. As a result, we get the five dimensional N=4 supersymmetric mechanics describing the motion of an isospin carrying particle interacting with a Yang monopole. We provide the Lagrangian and Hamiltonian descriptions of this system. Some possible generalizations of the action to the cases of systems with a more general bosonic action, a four-dimensional system which still includes eight fermionic components, and a variant of five-dimensional N=4 mechanics constructed with the help of the ordinary and twisted N=4 hypermultiplets were also considered.Comment: 11 pages, LaTeX file, no figures; 3 references added, minor correction

N=4 mechanics, WDVV equations and roots

N=4 superconformal multi-particle quantum mechanics on the real line is governed by two prepotentials, U and F, which obey a system of partial differential equations linear in U and generalizing the Witten-Dijkgraaf-Verlinde-Verlinde (WDVV) equation for F. Putting U=0 yields a class of models (with zero central charge) which are encoded by the finite Coxeter root systems. We extend these WDVV solutions F in two ways: the A_n system is deformed n-parametrically to the edge set of a general orthocentric n-simplex, and the BCF-type systems form one-parameter families. A classification strategy is proposed. A nonzero central charge requires turning on U in a given F background, which we show is outside of reach of the standard root-system ansatz for indecomposable systems of more than three particles. In the three-body case, however, this ansatz can be generalized to establish a series of nontrivial models based on the dihedral groups I_2(p), which are permutation symmetric if 3 divides p. We explicitly present their full prepotentials.Comment: 1+25 pages; v2: major revision (more general analysis, new solutions, additional references); v3: improvements in sects.5,8,9, refs. adde

CP(n) supersymmetric mechanics in U(n) background gauge fields

We construct a new N=4 supersymmetric mechanics describing the motion of a particle over a $CP^n$ manifold in U(n) background gauge fields.Comment: 8 pages, LaTeX file, PACS number: 11.30.Pb; footnote added on page 1, comments concerning brackets in (2.11) added, formula (3.4) is rewritten, and two new formulas (3.8) and (3.9) have been adde

Many-Body Superconformal Systems from Hamiltonian Reductions

We propose a new reduction mechanism which allows one to construct n-particle (super)conformal theories with pairwise interaction starting from a composite system involving n(n-1)/2+1 copies of the ordinary (super)conformal mechanics. Applications of the scheme include an N=4 superconformal extension for a complexification of the Calogero model and a D(2,1|\alpha)-invariant n-particle system.Comment: 12 pages, no figures. v2: Title changed. New material and acknowledgements adde

Postoperative follow-up of patients with liver resections on the occasion of colorectal metastases

Проучването обхваща 107 болни с чернодробни резекции по повод на чернодробни метастази от колоректален рак (КРР). Касае се за 54 мъже на средна възраст от 65,02 10,44 г. и за 53 жени на средна възраст от 65,13 8,48 г. Извършени са 50 би- и трисегментектомии, 45 - моносегментектомии, 20 хемихепатектомии и 5 клиновидни резекции. Установяват се различия по отношение на основните оперативни показатели, преживяемостта и смъртността на болните в зависимост от броя на резецираните чернодробни сегменти и поредността на резекцията. Препоръчва се извършването на моно- и бисегментектомии при случаите с онкохирургическа целесъобразност.The study covered 107 patients who had undergone liver resections on the occasion of colorectal cancer (CRC). There were 54 males at a mean age of 65,02 10,44 years and 53 females at a mean age of 65,13 8,48 years. Fifty bi- and trisegmentectomies, 45 monosegmentectomies, 20 hemihepatectomies and 5 wedge resections were done. Certain differences in respect of the main operative parameters, patients` survival and mortality rates in dependence on the number of resected segments and the consecutive number of the resection were established. The performance of mono- and bisegmentectomies in the cases with oncological surgical advisability was recommended

Prognostic value of C-reactive protein in patients with liver resections on the occasion of colorectal metastases

Серумните концентрации на С-реактивния протеин са изследвани при 107 оперирани болни с чернодробни метастази от колоректален рак (КРР). Касае се за 54 мъже на средна възраст от 65,02 10,44 г. (между 31 и 81 г.) и за 53 жени на средна възраст от 65,13 8,48 г. (между 40 и 81 г.). Извършени са общо 120 чернодробни резекции - 50 би- и трисегментектомии, 45 - моносегментектомии, 20 хемихепатектомии и 5 клиновидни резекции. Анализирана е следоперативната преживяемост в месеци в зависимост от праговата концентрация на С-реактивния протеин от 10 mg/L. Преживяемостта е по-добра при болните с ниски предоперативни стойности на този показател. Установява се умерена корелационна зависимост (r=0,38; p<0,05) между концентрациите на С-реактивния протеин ≤10 mg/L и броя на преживените месеци след операцията. Изследването на С-реактивния протеин подпомага прогнозирането на преживяемостта на оперираните болни с чернодробни метастази от КРР.Serum C-reactive protein concentrations of 107 patients operated for colorectal cancer liver metastases were examined. It dealt with 54 males at a mean age of 65,02 10,44 years (range, 31 and 81 years) and 53 females at a mean age of 65,13 8,48 years (range, 40 and 81 years). A total of 120 liver resections such as 50 bi- and trisegmentectomies, 45 monosegmentectomies, 20 hemihepatectomies and 5 wedge resections were performed. The postoperative survival rate (in months) was analyzed depending on the threshold C-reactive protein concentration of 10 mg/L. The survival rate was better among the patients with lower preoperative values of this parameter. There was moderate correlation dependence between C-reactive protein concentrations ≤10 mg/L and the number of months survived following surgery. The examination of the C-reactive protein helps the prognostication of the survival of the apteints operated for colorectal cancer liver metastases

Wiring surface loss of a superconducting transmon qubit

Quantum processors using superconducting qubits suffer from dielectric loss leading to noise and dissipation. Qubits are usually designed as large capacitor pads connected to a non-linear Josephson junction (or SQUID) by a superconducting thin metal wiring. Here, we report on finite-element simulation and experimental results confirming that more than 50% of surface loss in transmon qubits can originated from Josephson junctions wiring and can limit qubit relaxation time. Extracting dielectric loss tangents capacitor pads and wiring based on their participation ratios, we show dominant surface loss of wiring can occur for real qubits designs. Then, we simulate a qubit coupled to a bath of individual TLS defects and show that only a small fraction (~18%) of coupled defects is located within the wiring interfaces, however, their coupling strength is much higher due to stronger electromagnetic field. Finally, we fabricate six tunable floating transmon qubits and experimentally demonstrate up to 20% improvement in qubit quality factor by wiring design optimization.Comment: 17 pages, 8 figure

Modern aspects of clinico-pathological characteristics and treatment of malignant colonic obstruction

The colorectal cancer is diagnosedatits complicated stage in 40 to 60%, including 35% with symtptoms of colonic obstruction. The postoperative mortality remains high, as well ast helethality. Our aim is to study the up-to-date aspects in the clinicopathological characteristics and treatment of malignant colonic obstruction (colon ileus cancer). From 1009 patients operated for24 years (1982-2005) with colorectal cancer with median age 67 years 378 patients (37.4%) were over 70years. The most important aim is too vercome the obstruction and restore the intestinal passage and if possible performare section of the tumor. The surgical tactics in case of malignat obstruction of the right colon is well described in the literature, but the question of tactics in case of left colon remains-single or double-tage operation. Other methods have also been discussed, suchascecostomy, NdYAG laser vaporization of the obstructing tumor. The stenting is related with significant advantages and is used for palliative procedures or as a bridge to surgery.Scripta Scientifica Medica 2011;43(2):63-7

Octahedral chalcogenide rhenium cluster complexes with imidazole

Reactions of [{Re6Q8}Br6]4−/3− (Q = S, Se) with molten imidazole lead to the formation of two new neutral cluster complexes [{Re6Q8}(imzH)4(imz)2] (imzH = imidazole). The interaction of [{Re6Q8}(imzH)4(imz)2] with hydrohalic acids resulted in cationic complexes [{Re6Q8}(imzH)6]X2 (X = Cl, Br). All compounds were characterised by X-ray single-crystal and powder diffraction analyses, elemental analysis, energy dispersive X-ray and IR spectroscopies. The luminescence of the neutral compounds [{Re6Q8}(imzH)4(imz)2] was also studied

Преклинический атеросклероз: эндотелиальная дисфункция, комплекс интима-медиа, сосудистая жесткость

Preclinical atherosclerosis is an acute problem of contemporary medicine with significant effects on cardiovascular morbidity and mortality. Targeting strategy to tackle atherosclerotic disease at incipient clinical stages is undertaken to achieve a significant reduction in major cardiovascular events and reliance on an early assessment of serum markers of endothelial dysfunction and other noninvasive indicators of asymptomatic atherosclerotic arterial disease, such as the intimae-media thickness and arterial stiffness.Преклинический атеросклероз является острой проблемой современной медицины и обладает значительным влиянием на сердечно- сосудистую заболеваемость и смертность. Ориентация стратегии борьбы с атеросклеротической болезнью на преклинических стадиях нацелена на достижение значительного снижения основных сердечно-сосудистых осложнений и основана на ранней оценке сывороточных маркеров эндотелиальной дисфункции и на других неинвазивных показателях бессимптомного атеросклеротического поражения артерий, таких как толщина комплекса интима-медиа и жесткость сосудистых стенок