Absolute dimensions of detached eclipsing binaries. III. The metallic-lined system YZ Cassiopeiae

The bright binary system YZ Cassiopeiae is a remarkable laboratory for studying the Am phenomenon. It consists of a metallic-lined A2 star and an F2 dwarf on a circular orbit, which undergo total and annular eclipses. We present an analysis of 15 published light curves and 42 new high-quality echelle spectra, resulting in measurements of the masses, radii, effective temperatures and photospheric chemical abundances of the two stars. The masses and radii are measured to 0.5% precision: M_A = 2.263 +/- 0.012 Msun, M_B = 1.325 +/- 0.007 Msun, R_A = 2.525 +/- 0.011 Rsun and R_B = 1.331 +/- 0.006 Rsun. We determine the abundance of 20 elements for the primary star, of which all except scandium are super-solar by up to 1 dex. The temperature of this star (9520 +/- 120 K) makes it one of the hottest Am stars. We also measure the abundances of 25 elements for its companion (Teff = 6880 +/- 240 K), finding all to be solar or slightly above solar. The photospheric abundances of the secondary star should be representative of the bulk composition of both stars. Theoretical stellar evolutionary models are unable to match these properties: the masses, radii and temperatures imply a half-solar chemical composition (Z = 0.009 +/- 0.003) and an age of 490-550 Myr. YZ Cas therefore presents a challenge to stellar evolutionary theory.Comment: Accepted for publication in MNRAS. 15 pages, 9 tables, 7 figure

The Library of the Ethnographic Museum in Zagreb

The Library of the Ethnographic Museum is a special museum library. It is of a semiclosed type, which is the case with most special and museum libraries. It is primarily intended for the museum staff: curators, conservators and preparators. It was founded not long after the museum had been established and it grew simultaneously with the museum collection. The paper provides an overview of its history, some of its more important collections and the processing of the publications. Nevertheless, it also presents some of the problems faced

Exchange of Library Material of Ethnographic Museum in Zagreb

Rad prikazuje praksu razmjene knjižnične građe Etnografskog muzeja u Zagrebu kao jedan od bitnih segmenata rada muzejske knjižnice. Razmjena se odvija od samih početaka rada Muzeja. Muzej ima razmjerno veliku razmjenu s brojnim ustanovama u Hrvatskoj i inozemstvu. Pri razmjeni postoje određeni problemi koji imaju više uzroka: nedostatak kvalificiranog knjižničarskog osoblja u muzejima, manjak novca za potrebe razmjene i drugo. Razmjena publikacija samo je jedan od segmenata rada u muzejskim knjižnicama koji pokazuje potrebu za rješavanjem statusa tih knjižnica koji je vezan i uz rješavanje statusa muzejskih knjižničara.The paper presents the practice of exchange of library material of Ethnographic Museum in Zagreb as one of essential segments of work in a museum library. The exchange has been going on since the Museum beginning. The Museum has a comparatively big exchange with a number of institutions in Croatia and abroad. Certain problems occurring in exchange are caused by: lack of qualified library staff in museums and lack of resources for exchange. Exchange of publications is only one of the segments of work in museum libraries that points to the need to solve the status of these libraries as well as status of museum librarians

A Systematic Review of Anti-Brand Website Literature: What We Know and What We Need To Know

The emergence of Web 1.0 began an evolution in electronic communication. This platform resulted in a unidirectional communication flow (e.g. firm to consumer) that featured firms generating messages for public consumption. Web 1.0 gave rise to Web 2.0 and 3.0 platforms that facilitate bi-directional communication between firms and the public. This new method has resulted in an increase in consumer empowerment to create and disseminate marketing messages of their own (Williams, Crittenden, Keo, & McCarty, 2012). Third party stakeholders are disseminating electronic word-of-mouth communications about companies through the use of video, reviews, forums, microblogs and multiple other channels (Gil-Or, 2010). One important and rapidly growing outlet for these uncontrolled marketing communications is the anti-brand website (Bailey, 2004). Anti-brand websites provide a convenient and highly viewable platform for consumers, current and former employees, vendors and other parties interested in the targeted firm and/or brand, to share information as well as their opinions about a company’s products or services. Anti-brand websites are rapidly growing in quantity, scope, breadth, and perhaps influence. Large corporations are taking notice and are reported to be responding in a generally ad hoc fashion (Wolrich, 2005)

Načela izrade jezika za predmetno označivanje

Rad donosi osnovna načela izrade jezika za predmetno označivanje. Uz definicije tih načela opisana je i njihova primjena u najvećim knjižnicama svijeta kao i neka rješenja i uočeni problemi unutar pojedinih sustava. Ta se načela temelje u prvom redu na semantičkim i pragmatičkim odnosima. Članak se daje lingvističkoj zajednici da vidi kako se druge discipline koriste dostignućima lingvistike i kako bez lingvistike neke discipline i ne mogu razvijati svoje sustave

Kronika

Kronik