The radial Tully-Fisher relation for spiral galaxies - I

We find a new Tully-Fisher-like relation for spiral galaxies holding at different galactocentric radii. This radial Tully-Fisher relation allows us to investigate the distribution of matter in the optical regions of spiral galaxies. This relation, applied to three different samples of rotation curves of spiral galaxies, directly proves that: (i) the rotation velocity of spirals is a good measure of their gravitational potential and both the rotation curve's amplitudes and profiles are well predicted by galaxy luminosity, (ii) the existence of a dark component, less concentrated than the luminous one, and (iii) a scaling law, according to which, inside the disc optical size: M-dark/M-lum = 0.5(L-B/10(11) L-B circle dot)(-0.7)

The Universal Rotation Curve of Spiral Galaxies. II The Dark Matter Distribution out to the Virial Radius

In the current LambdaCDM cosmological scenario, N-body simulations provide us with a Universal mass profile, and consequently a Universal equilibrium circular velocity of the virialized objects, as galaxies. In this paper we obtain, by combining kinematical data of their inner regions with global observational properties, the Universal Rotation Curve (URC) of disk galaxies and the corresponding mass distribution out to their virial radius. This curve extends the results of Paper I, concerning the inner luminous regions of Sb-Im spirals, out to the edge of the galaxy halos.Comment: In press on MNRAS. 10 pages, 8 figures. The Mathematica code for the figures is available at: http://www.novicosmo.org/salucci.asp Corrected typo

Barium and Yttrium abundance in intermediate-age and old open clusters

Barium is a neutron capture element, that, in open clusters, is frequently over-abundant with respect to the Iron. A clear explanation for this is still missing. Additionally, its gradient across the Galactic disk is poorly constrained. We measure the abundance of yttrium and barium using the synthetic spectrum method from UVES high-resolution spectra of eight distant open clusters, namely Ruprecht 4, Ruprecht 7, Berkeley 25, Berkeley 73, Berkeley 75, NGC 6192, NGC 6404, and NGC 6583. The barium abundance was estimated using NLTE approximation. We confirm that Barium is indeed over-abundant in most clusters, especially young clusters. Finally, we investigated the trend of yttrium and barium abundances as a function of distance in the Galaxy and ages. Several scenarios for the barium over-abundance are then discussed.Comment: 9 pages, 10 figure

On the subject of the Ba overabundance in the open clusters stars

For eight distant open clusters, namely Ruprecht 4, Ruprecht 7, Berkeley 25, Berkeley 73, Berkeley 75, NGC 6192, NGC 6404, and NGC 6583, we determined the yttrium and barium abundances using the UVES, VLT spectra (ESO, Chile). The stars of one young cluster (Ruprecht 7) demonstrate significant barium overabundance( 3c0.55 dex) that can not be due to the determination error. We have considered the Ba abundance determination errors due to LTE approach, saturation of the lines, synthetic and observed barium line fitting, and the causes of the Ba overabundance associated with the Galactic disc enrichment or the origin of open clusters. Possible explanation for this overabundance can be the origin of n-capture elements enrichment of the clusters (galactic or extragalactic) or additional sources of the Ba production

EAS spectrum in the primary energy region above 10 to the 15th power eV by the Akeno and Yakutsk array data

The extensive air showers spectrum on scintillation desity Rko in primary energy region E sub approx. 10 to the 15th power - 10 to the 20th power eV on the Yakutsk array data and recent results of the Akeno is given

The use of the method of base diagrams for predicting the long-term strength under static and cyclic loading

It is shown that the experience of processing the large amounts of experimental data on the long-term strength of heat-resistant steels and alloys using the method of base diagrams, which were obtained from testing of smooth specimens, can be used effectively for proper processing of test results for notched specimens. Extensive research has been carried out in order to find an appropriate combination of a lifetime prediction rule and a suitable constitutive model to give a reliable prediction of lifetime in idealized creep-rupture-low cycle fatigue interaction conditions

Educational Project Activities in the Process of Teaching of Bachelors

Статья раскрывает проблему исследования роли инновационной деятельности в развитии профессиональных и личностных качеств бакалавров университета. В работе раскрыты проектные методы обучения и условия развития рефлексивных умений обучающихся.The article reveals the problem of research on the role of project activities in the development of professional and personal qualities of bachelors University. The paper disclosed the project methods of teaching and conditions of development of reflective abilities of students

The Use of an Electronic Resource in the Educational Process

В настоящее время актуальными являются вопросы учебно-методического характера по организации учебного процесса с использованием электронного ресурса. Предметом исследования применение различных электронным форм для всех видов занятий, а именно для лекций, семинарских занятий, лабораторного практикума. В ходе данной статьи рассмотрены электронный формат предоставления информации по дисциплине и организация проверки знаний в автоматизированном режиме, реализуемые на кафедре Теоретических основ теплотехники им. М.П. Вукаловича (ТОТ им. М.П. Вукаловича) НИУ МЭИ.Currently, issues of an educational and methodological nature on the organization of the educational process using an electronic resource are relevant. The subject of the study is the use of various electronic forms for all types of classes, namely for lectures, seminars, laboratory workshops. In the course of this article, the electronic format of providing information on the discipline and the organization of knowledge testing in automated mode, implemented at the Department of Theoretical Foundations of Thermal Engineering named after M.P. Vukalovich (TOT named after M.P. Vukalovich), are considered NIU MEI

Influence of liposome forms of rhenium-platinum anti-tumor system on the proliferative activity of cancer cells

Уперше показано антипроліферативну активність реній-платинової системи на клітинах раку крові людини СЕМ-Т4. Найефективнішими виявилися експерименти, де використовувались обидва компоненти системи. Показано також перевагу ліпосомних форм порівняно з розчинами препаратів та переважний апоптотичний механізм загибелі клітин під дією системи.Впервые показана антипролиферативная активность рений-платиновой системы на клетках рака крови человека СЕМ-Т4. Наиболее эффективными оказались эксперименты, где использовались оба компонента системы. Показано также преимущество липосомных форм в сравнении с растворами препаратов и преимущественный апоптотический механизм гибели клеток под действием системы.First the antiproliferative activity of the antitumor system rhenium-platinum on the human blood cancer cells СЕМ-Т4 was shown. Experimental administration of both components of the system showed the most effectiveness. The advantages of liposomic forms in comparison with preparations solutions and dominating apoptotic mechanism of the cancer cells death under the treatment by the system were shown

Tuberculosis-HIV Co-infection in Kiev City, Ukraine

In 2004, we tested all patients with newly diagnosed tuberculosis (TB) for HIV in Kiev City. The results were compared to information from medical records of 2002, when co-infection prevalence was 6.3%. Of 968 TB patients, 98 (10.1%) were HIV infected. TB-HIV co-infection is increasing, especially in injecting drug users