79 research outputs found
Erratum: The Hubble Catalog of Variables (HCV) (A&A (2019) 630 A92 DOI: 10.1051/0004-6361/201936026)
No full textErrors have occurred during the production process. On page 15, Sect. 7, third paragraph, tenth line, the sentence should read: “The number of data points in the HCV light curves ranges from five (our cut-olimit) to 120.” And the citation “Spetsieri et al. 2019” should be “Spetsieri et al., in prep.”, in the first paragraph of Sect. 7.4 (page 19), and in Sect. 8, second to last paragraph (page 21). © 2019 EDP Sciences. All rights reserved
The HST Key Project galaxies NGC 1326A, NGC 1425, and NGC 4548: New variable stars and massive star population
No full textStudies of the massive star population in galaxies beyond the Local Group are the key to understanding the link between their numbers and modes of star formation in different environments. We present the analysis of the massive star population of the galaxies NGC 1326A, NGC 1425, and NGC 4548 using archival images obtained with the Hubble Space Telescope Wide Field Planetary Camera 2 in the F555W and F814W filters. Through high-precision point spread function fitting photometry for all sources in the three fields, we identified 7640 candidate blue supergiants, 2314 candidate yellow supergiants, and 4270 candidate red supergiants. We provide an estimate of the ratio of blue to red supergiants for each field as a function of galactocentric radius. Using Modules for Experiments in Stellar Astrophysics (MESA) at solar metallicity, we defined the luminosity function and estimated the star formation history of each galaxy. We carried out a variability search in the V and I filters using three variability indexes: the median absolute deviation, the interquartile range, and the inverse von Neumann ratio. This analysis yielded 243 new variable candidates with absolute magnitudes ranging from MV=-4 to -10 mag. We classified the variable stars based on their absolute magnitude and their position on the color-magnitude diagram using the MESA evolutionary tracks at solar metallicity. Our analysis yielded 8 candidate variable blue supergiants, 12 candidate variable yellow supergiants, 21 candidate variable red supergiants, and 4 candidate periodic variables. © ESO 2019
First systematic high-precision survey of bright supernovae: I. Methodology for identifying early bumps
No full textRapid variability before and near the maximum brightness of supernovae has the potential to provide a better understanding of nearly every aspect of supernovae, from the physics of the explosion up to their progenitors and the circumstellar environment. Thanks to modern time-domain optical surveys, which are discovering supernovae in the early stage of their evolution, we have the unique opportunity to capture their intraday behavior before maximum. We present high-cadence photometric monitoring (on the order of seconds-minutes) of the optical light curves of three Type Ia and two Type II SNe over several nights before and near maximum light, using the fast imagers available on the 2.3 m Aristarchos telescope at Helmos Observatory and the 1.2 m telescope at Kryoneri Observatory in Greece. We applied differential aperture photometry techniques using optimal apertures and we present reconstructed light curves after implementing a seeing correction and the Trend Filtering Algorithm (TFA, Kovács et al. 2005, MNRAS, 356, 557). TFA yielded the best results, achieving a typical precision between 0.01 and 0.04 mag. We did not detect significant bumps with amplitudes greater than 0.05 mag in any of the SNe targets in the VR-, R-, and I-bands light curves obtained. We measured the intraday slope for each light curve, which ranges between -0.37-0.36 mag day-1 in broadband VR, -0.19-0.31 mag day-1 in R band, and -0.13-0.10 mag day-1 in I band. We used SNe light curve fitting templates for SN 2018gv, SN 2018hgc and SN 2018hhn to photometrically classify the light curves and to calculate the time of maximum. We provide values for the maximum of SN 2018zd after applying a low-order polynomial fit and SN 2018hhn for the first time. We conclude that optimal aperture photometry in combination with TFA provides the highest-precision light curves for SNe that are relatively well separated from the centers of their host galaxies. This work aims to inspire the use of ground-based, high-cadence and high-precision photometry to study SNe with the purpose of revealing clues and properties of the explosion environment of both core-collapse and Type Ia supernovae, the explosion mechanisms, binary star interaction and progenitor channels. We suggest monitoring early supernovae light curves in hotter (bluer) bands with a cadence of hours as a promising way of investigating the post-explosion photometric behavior of the progenitor stars. © 2020 ESO
An Integrated IVIF-DEMATEL and IVIF-TOPSIS Methodology for Hotel Information System Selection
No full textThe importance of information technologies in hotels has increased more in recent years due to the variety of required processes and the level of competitiveness in the sector. Depending on their contribution to creating value and increasing efficiency, hotel enterprises make important investments in information technologies. However, there are various criteria and alternatives in the selection process of the most suitable hotel information system. Moreover, the criteria affect each other in a fuzzy decision-making environment. Hence, two techniques are utilized synergistically in this study. IVIF-DEMATEL is initially performed to obtain the importance degrees of the criteria. Afterward, IVIF-TOPSIS is applied to reach the final rankings. An application is performed considering the case in the Turkish tourism sector, and the alternatives are ranked. © 2021, The Editor(s) (if applicable) and The Author(s), under exclusive license to Springer Nature Switzerland AG
The Lord doth see, the Lord provide [varies with each verse] [first line of chorus]
No full textstrophic with choruspiano and voiceJohns Hopkins University, Levy Sheet Music Collection, Box
032, Item 055The Poetry Written by the Author of The Last Day. The Music Composed by Charles H. Purday.Maleley del et lith. 3 Wellington St. Stran
Work-family conflicts and job attitudes of single women: A developing country perspective
No full textThis study addresses work-family conflicts and job attitudes of white-collar single women and the ensuing work-related attitudes in a developing country context. After an overview of gender roles in Arab society, several hypotheses were advanced and tested. Although married females reported higher family-work conflicts than single females, the latter group faced a host of strains, which are presented and analyzed. Despite being educated, single females were underpaid and their upward mobility seemed to be significantly hampered. They reported lower job satisfactions and had high intentions to leave their organization. Implications for further research and practice are discussed. © 2012 Copyright Taylor and Francis Group, LLC.Allen T D, 2000, J Occup Health Psychol, V5, P278, DOI 10.1037-1076-8998.5.2.278; Aryee S, 2005, S APPL PSYC, P261; Aryee S, 1999, J MANAGE, V25, P491, DOI 10.1177-014920639902500402; Barakat H., 1998, CONT ARAB SOC EXPLOR; BEDEIAN AG, 1988, J MANAGE, V14, P475, DOI 10.1177-014920638801400310; Biggs A., 2005, EQUAL OPPORTUNITIES, V24, P30, DOI [10.1108-02610150510787999, DOI 10.1108-02610150510787999]; Boles J. S., 2001, J MANAGERIAL ISSUES, V13, P376; Burke R., 2009, GENDER MANAGEMENT IN, V24, P70; Chammas M., 2010, GLOBAL ENTREPRENEURS; Chen ZX, 2000, HUM RELAT, V53, P869; Choi J, 2008, INT J HUM RESOUR MAN, V19, P878, DOI 10.1080-09585190801993885; Cohen J, 2003, APPL MULTIPLE REGRES; Coronel JM, 2010, GENDER WORK ORGAN, V17, P219, DOI 10.1111-j.1468-0432.2009.00463.x; Cummins HA, 2005, WOMEN STUD INT FORUM, V28, P222, DOI 10.1016-j.wsif.2005.04.009; Davidson M. J., 1992, SHATTERING GLASS CEI; De Atkine, 1973, ARAB MIND; Diekman AB, 2002, J EXP SOC PSYCHOL, V38, P268, DOI 10.1006-jesp.2001.1511; Eagly AH, 2009, AM PSYCHOL, V64, P644, DOI 10.1037-0003-066X.64.8.644; EISENBERGER R, 1986, J APPL PSYCHOL, V71, P500, DOI 10.1037--0021-9010.71.3.500; Emslie C, 2009, GENDER WORK ORGAN, V16, P151, DOI 10.1111-j.1468-0432.2008.00434.x; Fargues P, 2005, REPROD HEALTH MATTER, V13, P43, DOI 10.1016-S0968-8080(05)25161-3; Foley S., 2005, Asia Pacific Journal of Management, V22, DOI 10.1007-s10490-005-3568-3; Frone MR, 1997, J VOCAT BEHAV, V50, P145, DOI 10.1006-jvbe.1996.1577; Grandey AA, 2005, J OCCUP ORGAN PSYCH, V78, P305, DOI 10.1348-096317905X26769; Greenhaus J H, 2001, J Occup Health Psychol, V6, P91, DOI 10.1037-1076-8998.6.2.91; Greenhaus J.H., 1999, HDB GENDER WORK, P391; GUTEK BA, 1991, J APPL PSYCHOL, V76, P560, DOI 10.1037--0021-9010.76.4.560; Hang-yue N, 2005, INT J HUM RESOUR MAN, V16, P2133, DOI 10.1080-09585190500315141; Joplin J. R. W., 2003, INT J CROSS CULTURAL, V3, P305, DOI [10.1177-1470595803003003004, DOI 10.1177-1470595803003003004]; Joseph S., 2008, ARAB SOC CULTURE ESS, P278; JUDGE TA, 1994, J APPL PSYCHOL, V79, P767, DOI 10.1037--0021-9010.79.5.767; Kandiyoti D, 1988, GENDER SOC, V2, P274, DOI 10.1177-089124388002003004; Karasek R, 1998, J Occup Health Psychol, V3, P322, DOI 10.1037-1076-8998.3.4.322; Karimi L., 2009, J FAMILY EC ISSUES, V30, P193; Kawar M., 2000, Gender and Development, V8, P56, DOI 10.1080-741923629; Khalaf S., 2008, ARAB SOC CULTURE ESS; LAZARUS RS, 1991, AM PSYCHOL, V46, P819, DOI 10.1037--0003-066X.46.8.819; Livingston BA, 2008, J APPL PSYCHOL, V93, P207, DOI 10.1037-0021-9010.93.1.207; Marlow C., 1993, AFFILIA, V8, P40, DOI 10.1177-088610999300800104; McHale SM, 1999, CHILD DEV, V70, P990, DOI 10.1111-1467-8624.00072; Metcalfe BD, 2007, INT J HUM RESOUR MAN, V18, P54, DOI 10.1080-09595190601068292; Netemeyer RG, 1996, J APPL PSYCHOL, V81, P400, DOI 10.1037-0021-9010.81.4.400; Omar A., 2001, CROSS CULTURAL MANAG, V8, P35, DOI 10.1108-13527600110797272; Ozkanli O., 2009, EQUAL OPPORTUNITIES, V28, P324; Poelmans SAY, 2003, INT J MANPOWER, V24, P128, DOI 10.1108-01437720310475394; Rothausen TJ, 1999, J ORGAN BEHAV, V20, P817, DOI 10.1002-(SICI)1099-1379(199911)20:6817::AID-JOB9533.0.CO;2-E; Sandhu H.S., 2006, J ADV MANAGEMENT RES, V3, P68; Schaefer Davis S., 2008, ARAB SOC CULTURE ESS, P77; Schein V. E., 1999, PSYCHOL DEV SOC, V11, P105, DOI 10.1177-097133369901100106; Sharabi H., 1992, NEOPATRIARCHY THEORY; Sidani Y., 2005, WOMEN MANAGEMENT REV, V20, P498, DOI DOI 10.1108-09649420510624738; Sidani YM, 2000, J SOC PSYCHOL, V140, P597; Smithson J, 2005, GENDER WORK ORGAN, V12, P147, DOI 10.1111-j.1468-0432.2005.00267.x; Spector PE, 2007, PERS PSYCHOL, V60, P805, DOI 10.1111-j.1744-6570.2007.00092.x; Streich M, 2008, J MANAGE PSYCHOL, V23, P252, DOI 10.1108-02683940810861374; Sugita S., 2008, PRELIMINARY ASSESSME; Taylor J.C., 1972, SURVEY ORG MACHINE S; Theorell Tores, 1996, P69; Thomson K., 1998, EXECUTIVE, V1, P18; Wharton AS, 2006, J FAM ISSUES, V27, P415, DOI 10.1177-0192513X05282985; Wu ML, 2010, INT J HUM RESOUR MAN, V21, P742, DOI 10.1080-09585191003658912; Yamokoski A, 2006, FEM ECON, V12, P167, DOI 10.1080-13545700500508478; Yavas U., 2009, INT J SERV IND MANAG, V19, P722
The Lord doth see, the Lord provide [varies with each verse] [first line of chorus]
No full textstrophic with choruspiano and voiceJohns Hopkins University, Levy Sheet Music Collection, Box
032, Item 055The Poetry Written by the Author of The Last Day. The Music Composed by Charles H. Purday.Maleley del et lith. 3 Wellington St. Stran
First systematic high-precision survey of bright supernovae
No full textRapid variability before and near the maximum brightness of supernovae has the potential to provide a better understanding of nearly every aspect of supernovae, from the physics of the explosion up to their progenitors and the circumstellar environment. Thanks to modern time-domain optical surveys, which are discovering supernovae in the early stage of their evolution, we have the unique opportunity to capture their intraday behavior before maximum. We present high-cadence photometric monitoring (on the order of seconds-minutes) of the optical light curves of three Type Ia and two Type II SNe over several nights before and near maximum light, using the fast imagers available on the 2.3 m Aristarchos telescope at Helmos Observatory and the 1.2 m telescope at Kryoneri Observatory in Greece. We applied differential aperture photometry techniques using optimal apertures and we present reconstructed light curves after implementing a seeing correction and the Trend Filtering Algorithm (TFA, Kovács et al. 2005, MNRAS, 356, 557). TFA yielded the best results, achieving a typical precision between 0.01 and 0.04 mag. We did not detect significant bumps with amplitudes greater than 0.05 mag in any of the SNe targets in the VR-, R-, and I-bands light curves obtained. We measured the intraday slope for each light curve, which ranges between −0.37−0.36 mag day−1 in broadband VR, −0.19−0.31 mag day−1 in R band, and −0.13−0.10 mag day−1 in I band. We used SNe light curve fitting templates for SN 2018gv, SN 2018hgc and SN 2018hhn to photometrically classify the light curves and to calculate the time of maximum. We provide values for the maximum of SN 2018zd after applying a low-order polynomial fit and SN 2018hhn for the first time. We conclude that optimal aperture photometry in combination with TFA provides the highest-precision light curves for SNe that are relatively well separated from the centers of their host galaxies. This work aims to inspire the use of ground-based, high-cadence and high-precision photometry to study SNe with the purpose of revealing clues and properties of the explosion environment of both core-collapse and Type Ia supernovae, the explosion mechanisms, binary star interaction and progenitor channels. We suggest monitoring early supernovae light curves in hotter (bluer) bands with a cadence of hours as a promising way of investigating the post-explosion photometric behavior of the progenitor stars
Question of the Interpretation of Presidential Inauguration Institute by the Constitution of the Republic of Kazakhstan
No full textThe article deals with the Question of the Interpretation of Presidential Inauguration Institute by the Constitution of the Republic of Kazakhstan. Most often they are expressed, or that it is not clear how to apply the constitutional provision, or appear two or more variants of its application, but mutually to each other exclusive. And then you want the official interpretation of the Constitution. The author analyzes the article 42 of the Constitution of the Republic of Kazakhstan
К вопросу о дуальных организациях традиционных обществ
No full textThe monograph examines the structure of traditional society in terms of dual or triple organization. The question of the target reason of such structuring of societies is investigated. In this regard, we consider the concept of social exchange that has developed in the French sociological school and the "twin myth", which was addressed by representatives of the Tartu-Moscow school. The dual nature of the Supreme power as the sacred center of many traditional societies is investigated. Parts of the social space are correlated by the author with certain phases of the social cycle prescribed in the calendars, as well as with social strata. To do this, the author refers to the works of "traditionalists"В монографии рассматриваются структуры традиционного общества с точки зрения дуальной или тройственной организации. Исследуется вопрос целевой причины такого структурирования обществ. В этой связи рассматривается концепция социального обмена, сложившаяся во французской социологической школе и «близнечный миф», к которому обращались представители Тартуско-Московской школы. Исследуется двойственная природа верховная власти, как сакрального центра многих традиционных обществ. Части социального пространства соотносятся автором с определенными фазами социального цикла, прописанных в календарях, а также с социальными стратами. Для этого автор обращается к работам «традиционалистов»
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