Square vortex solitons with a large angular momentum

We show the existence of square shaped optical vortices with a large value of the angular momentum hosted in finite size laser beams which propagate in nonlinear media with a cubic-quintic nonlinearity. The light profiles take the form of rings with sharp boundaries and variable sizes depending on the power carried. Our stability analysis shows that these light distributions remain stable when propagate, probably for unlimited values of the angular momentum, provided the hosting beam is wide enough. This happens if the peak amplitude approaches a critical value which only depends on the nonlinear refractive index of the material. A variational approach allows us to calculate the main parameters involved. Our results add extra support to the concept of surface tension of light beams that can be considered as a trace of the existence of a liquid of light.Comment: 6 pages, 6 figures, submitted to Phys. Rev.

Method approaches of the evaluation of preconditions introduction of free economic zones in Ukraine

На современном этапе развития экономики Украины особого внимания заслуживает проблема эффективного использования механизма свободных экономических зон (СЭЗ). Одной из причин негативного опыта внедрения СЭЗ в Украине явилось отсутствие системы критериев для оценивания целесообразности такого внедрения. Принятие решения на основе отбора таких критериев должно опираться на оценку экономического развития территории или региона, в котором планируется создание СЭЗ. В статье приведена методика расчета системы показателей, которую можно использовать на предварительном этапе оценивания целесообразности введения специальных экономических зон.На сучасному етапі розвитку економіки України особливої уваги заслуговує проблема ефективного використання механізму вільних економічних зон (ВЕЗ). Однією з причин негативного досвіду впровадження ВЕЗ в Україні стала відсутність системи критеріїв для оцінювання доцільності такого впровадження. Прийняття рішення на основі добору таких критеріїв повинно спиратися на оцінку економічного розвитку території або регіону, в якому планується створення ВЕЗ. У статті наведена методика розрахунку системи показників, яку можна використовувати на попередньому етапі оцінювання доцільності запровадження спеціальних економічних зон.Today the problem of effective usage of free economic zones (SEZ) mechanism is on special focus. Thus, one reason for the negative experience of SEZ introduction in Ukraine was the absence of criterion system for such introduction to be done. Making a decision should be based on the economic development evaluation of the territory or region, which is planned to create free economic zones on. The article describes a method and a system of indicators that can be used in the preliminary evaluation phase

Financial potential of insurer

Запропонована методика визначення фінансового потенціалу страховика. Зроблений порівняльний аналіз діяльності страховиків (українського та закордонного) із застосуванням даної методики.Предложена методика определения финансового потенциала страховщика. Сделан сравнительный анализ деятельности страховщиков (украинского и зарубежного) с применением данной методики.In article proposed methodology of determination of financial potential of insurer company. The done comparative analysis of activity of insurers(Ukrainian and foreign) is with application of this methodology

Concurrent thermochemoradiotherapy for brain high-grade glioma

Despite the achievements in the current strategies for treatment, the prognosis in malignant glioma patients remains unsatisfactory. Hyperthermia is currently considered to be the most effective and universal modifier of radiotherapy and chemotherapy. Preliminary treatment outcomes for 28 patients with newly diagnosed (23) and recurrent (5) high-grade gliomas were presented. All the patients received multimodality treatment including surgery, thermoche-moradiotherapy followed by 4 cycles of adjuvant chemotherapy. All the patients endured thermochemoradiotherapy well. A complication, limited skin burn (II stage), was diagnosed in two cases and treated conservatively without treatment interruption. A month after thermochemoradiotherapy the results were as follows: complete regression was achieved in 4 cases, partial regression in 4 cases, stable disease in 14 cases and disease progression in 6 cases (one of them is pseudo-progression). After completing the adjuvant chemotherapy 2 more patients demonstrated complete response and 1 patient had disease progression. Introduction of local hyperthermia in multimodal therapy of malignant glioma does not impair the combined modality treatment tolerability of patients with malignant gliomas. A small number of studied patients and short follow-up time do not allow making reliable conclusions about the impact of local hyperthermia on the treatment outcomes; however, there is a tendency towards the increase in disease-free survival in the patients with newly diagnosed malignant gliomas

Lithologic-facies and paleogeographic features of Mid-Upper Jurassic oil-gas bearing sediments in Nurolsk depression (Western Siberia)

Bathonian-Callovian-Oxfordian sedimentation environment reconstruction in SE Nurolsk depression, Western Siberia has been described. Paleogeographic and litho-geochemical features of sediments, numerous plant remains and ichnofossils indicated the fact that this territory during the Naunaksk suite formation was the transition in-situ sedimentogenesis. Based on the integrated research data, the potential litho-facies were identified in the Mid-Upper sediments within Nurolsk depression, Western Siberia

Laser in the axial electric field as a tool to search for P-, T- invariance violation

We consider rotation of polarization plane of the laser light when a gas laser is placed in a longitudinal electric field (10~kV/cm). It is shown that residual anisotropy of the laser cavity 10^{-6} and the sensitivity to the angle of polarization plane rotation about 10^{-11} -10^{-12} rad allows one to measure an electron EDM with the sensitivity about 10^{-30} e cm.Comment: 12 page

The Technology and Construction Methods of Digital Terrain Models

Using of digital maps in simulators will dynamically change the tasks options and improve the quality of military professionals. The paper said existing ways to get digital maps and focuses on the most promising of them. Also identified the main stages of the automated vectorization process and analyzed algorithms used to implement them

Numeral polysemy

The quantitative determination of the world is influenced by the semantics of any language. In the most developed modern languages, including English, the means of expressing ideas of quantity permeate all the levels of language structure, phraseology as well

Laser induced breakdown of the magnetic field reversal symmetry in the propagation of unpolarized light

We show how a medium, under the influece of a coherent control field which is resonant or close to resonance to an appropriate atomic transition, can lead to very strong asymmetries in the propagation of unpolarized light when the direction of the magnetic field is reversed. We show how EIT can be used to mimic effects occuring in natural systems and that EIT can produce very large asymmetries as we use electric dipole allowed transitions. Using density matrix calculations we present results for the breakdown of the magnetic field reversal symmetry for two different atomic configurations.Comment: RevTex, 6 pages, 10 figures, Two Column format, submitted to Phys. Rev.