Asteroids with unusual lightcurves: 14 Irene and 51 Nemausa

Some asteroids with peculiar light curves were chosen for more detail investigation. We present the first results of that study. Observations were obtained in 1989 and 1990 using the 70-cm telescope of Kharkov Observatory; the 40-cm telescope of Abastumani Observatory (Georgia), and the 60-cm telescope of the Main Astronomical Observatory of Ukrainian Academy of Sciences (Mt. Majdanak, Middle Asia). Observations and their reduction were carried out in a standard way. The aspect data, absolute magnitude of primary maximum, and lightcurve amplitude are given

House commune as a socio-architectural phenomenon

This paper discusses the importance of studying and rethinking our understanding of the constructivist architecture development history in the 1920s and 1930s; in particular, house communes. A house commune is a residential building, or often a complex of buildings that unites a residential with common areas, such as households, leisure, sports facilities, and workshops. Typically, each house commune project is individually designed, based on the needs of future residents. As a result, many innovative solutions were made in their architectural organisation, such as double-height rooms and ramps instead of stairs. In this study, the architectural and planning solutions of house communes have been investigated while considering the chronology of their development. In addition, the experience of renovation (conservation) of house communes as a method for modern urban-space enrichment is considered. The modern creation of multi-apartment housing with the organisation of common communal areas and additional service provision is investigated in the context of cohousing

URBAN PLANNING PERSPECTIVES OF THE POTENTIAL OF RESORT DEVELOPMENT IN THE SERGEEVKA SETTLEMENT WITH TRAFFIC IMPROVEMENT

The Sergeevka resort is the largest climatic-balneal-mud resort in the south of Odessa region. This article presents an overview of the current state of the resort and an analysis of its transport-planning scheme. In addition, suggestions on the resort’s availability and improvement of its functioning are provided through reconstruction of the resort’s external (in particular with Odessa) and internal transport links. Based on the city-planning analysis of the existing access roads to the resort and within its territory, the study presents a concept of the organization of the transport scheme. Its basic arrangements will provide the opportunity for the development of the resort by contributing to the influx of vacationers and investments and creation of new workplaces

Sensitivity of the phenoxy derivatives of 2,4-dihydro-5H-[1,2,3]triazolo[4,5-d]pyrimidin-5-ones to acidic and basic stimuli

Herein we report the research on the sensitivity of six hydroxy derivatives of dihydrotriazolopyrimidines (HO-DTP) to acids and bases. The UV/Vis and fluorescence spectra of these compounds were investigated with the addition of the acids and bases. Spectral data revealed the strong red shifts for emission and absorption maxima in the presence of KOH and NaOH. Moreover, two DTPs demonstrated strengthening of the emission intensity. The obtained results and data published in our previous paper demonstrated the strong and selective sensory response of DTPs to the acids and bases and elucidated relationships between the structure and sensitivity to the environment. This finding allowed us to manage these properties by introducing the combination of substituents and functionalities into the heterocyclic core. Thus, investigations demonstrated the potential of the application of DTPs as chemo- and fluorosensors for selective detection of acids and bases

Content of stem tumor CD133⁺ cells in brain neoplasms of different histological type

Today, there are conflicting data on the content of cancer stem cells responsible for recurrence and resistance to chemotherapy in tumors of human brain. The aim of the study was to analyze the content of CD133⁺cells in different brain tumors by immunofluorescence assay and immunohistochemical method. Materials and Methods: The samples of different brain tumors removed during neurosurgical operations were studied for CD133 expression. Results: Immunofluorescence assay of tumor imprints revealed CD133⁺cells in 40–85% of tumors regardless of histological type. In malignant tumors, the count of CD133⁺cells was higher than in benign tumors. Immunohistochemical method used for detection of CD133⁺cells was less sensitive than immunofluorescence technique. The number of CD133⁺cells may vary even in tumors of the same histological type. In 20–30% of malignant tumors (glioblastomas, medulloblastomas), the content of CD133⁺cells was very low or not detected at all. Conclusions: In tumors of the brain of different genesis and degree of anaplasia CD133⁺cells are found out. In malignant tumors (glioblastomas and medulloblastomas), CD133⁺cells are much more frequently detected than in benign brain tumors. The content of CD133⁺cells in brain tumors is highly variable being small and some malignant tumors, indicating low predictive and diagnostic value of cancer stem cell content in clinical practice

College Expansion and the Marginal Returns to Education: Evidence from Russia

This paper evaluates whether the expansion of higher education is economically worthwhile based on a recent surge in the number of campuses and college graduates in Russia. Our empirical strategy relies on the marginal treatment effect method in both normal and semi‐parametric versions, and estimating policy‐influenced treatment parameters for the marginal students who are directly affected by college expansion. We use high‐quality panel data with multiple wage observations, many birth cohorts, disaggregated location information, and past economic conditions. We find that college expansion attracts individuals with lower returns to college, but the returns for marginal students vary considerably depending on the scale of expansion and the type of location where new campuses are opened. Marginal individuals in smaller cities and locations without college campuses receive the largest benefits from new campuses. The results provide important implications for the design of policies targeting the expansion of higher education

Taxonomy of Centaurs and Trans-Neptunian Objects

The original publication is available at http://iopscience.iop.org/1538-3881/.International audienceTrans-Neptunian objects (TNOs) and Centaurs display thewidest color diversity in comparison to other small solar system bodies. The investigation of their properties can help in understanding the evolution of these objects. In this paper we propose a classification scheme based on multivariate statistical analysis of a homogeneous, high-quality set of B - V, V - R, V - I , and V - J color indices. Analyzing a sample of 51 objects and using a high confidence level, four groups have been identified and named: BB, BR, IR, and RR. The group BB contains objects with neutral color and RR those with very red color, while the others have intermediate behavior. We extend the analysis to 84 other objects for which three colors are available, obtaining a preliminary classification. A tentative interpretation of these groups in terms of surface characteristics is given

Essays on the Expansion of Higher Education

Over the past twenty years, many developing countries expanded their higher education in order to become more competitive on international markets in future. The largest developing countries, Brazil, India, and Russia, tripled the number of college students per 100,000, and China increased the number of students twelve-fold. This expansion led to the influx of college graduates into the labor market, which had to adjust to the increase in the supply of educated workers. Existing literature shows how the adjustments associated with college expansion happen but many questions remain unanswered. This dissertation evaluates the expansion of higher education in Russia and the effect of expansion on Russian labor market. The dissertation focuses on two features of the expansion. First, college expansion is usually associated with an increasing participation of women in college education. When the share of educated female workers grows faster than the share of educated male workers, the gender gap in higher education narrows. Between 1990 and 2008, the number of female students in higher education in Russia tripled from 1.4 to 4.3 million and the share of female students rose from 50 to 58 percent. The first chapter estimates education externalities created by the educated men and women in the labor markets and evaluates whether the faster growth of college participation among women affects the gender wage gap through education externalities. Second, during the expansion many new campuses open, providing the access to college to individuals who were previously constrained. The second chapter co-authored with Klara Sabirianova Peter and Christian M. Posso evaluates whether the expansion of higher education is economically worthwhile based on a recent surge in the number of campuses and college graduates in Russia. The empirical strategy relies on the marginal treatment effect method in both normal and semi-parametric versions, and estimating policy-influenced treatment parameters for the marginal students who are directly affected by college expansion. Both of these questions associated with college expansion are heavily understudied in economics and this is where my dissertation contributes to the literature.Doctor of Philosoph

Quaoar: A Rock in the Kuiper belt

Here we report WFPC2 observations of the Quaoar-Weywot Kuiper belt binary. From these observations we find that Weywot is on an elliptical orbit with eccentricity of 0.14 {\pm} 0.04, period of 12.438 {\pm} 0.005 days, and a semi-major axis of 1.45 {\pm} 0.08 {\times} 104 km. The orbit reveals a surpsingly high Quaoar-Weywot system mass of 1.6{\pm}0.3{\times}10^21 kg. Using the surface properties of the Uranian and Neptunian satellites as a proxy for Quaoar's surface, we reanalyze the size estimate from Brown and Trujillo (2004). We find, from a mean of available published size estimates, a diameter for Quaoar of 890 {\pm} 70 km. We find Quaoar's density to be \rho = 4.2 {\pm} 1.3 g cm^-3, possibly the highest density in the Kuiper belt.Comment: 11 pages, 2 figures, accepted for publication in ApJ letters