Planets around active stars

We present the results of radial velocity measurements of two samples of active stars. The first sample contains field G and K giants across the Red Giant Branch, whereas the second sample consists of nearby young stars (d < 150 pc) with ages between 10 - 300 Myrs. The radial velocity monitoring program has been carried out with FEROS at 1.52 m ESO telescope (1999 - 2002) and continued since 2003 at 2.2 m MPG/ESO telescope. We observed stellar radial velocity variations which originate either from the stellar activity or the presence of stellar/substellar companions. By means of a bisector technique we are able to distinguish the sources of the radial velocity variation. Among them we found few candidates of planetary companions, both of young stars and G-K giants sample.Comment: 4 pages, 5 figures, to appear in the Proceedings of the ESO Workshop "Precision Spectroscopy in Astrophysics", eds. L. Pasquini, M. Romaniello, N.C. Santos, A. Correi

Evolved stars hint to an external origin of enhanced metallicity in planet-hosting stars

Exo-planets are preferentially found around high metallicity main sequence stars. We aim at investigating whether evolved stars share this property, and what this tells about planet formation. Statistical tools and the basic concepts of stellar evolution theory are applied to published results as well as our own radial velocity and chemical analyses of evolved stars. We show that the metal distributions of planet-hosting (P-H) dwarfs and giants are different, and that the latter do not favor metal-rich systems. Rather, these stars follow the same age-metallicity relation as the giants without planets in our sample. The straightforward explanation is to attribute the difference between dwarfs and giants to the much larger masses of giants' convective envelopes. If the metal excess on the main sequence is due to pollution, the effects of dilution naturally explains why it is not observed among evolved stars. Although we cannot exclude other explanations, the lack of any preference for metal-rich systems among P-H giants could be a strong indication of the accretion of metal-rich material. We discuss further tests, as well as some predictions and consequences of this hypothesis.Comment: A&A, in pres

Pemodelan Inflasi di Kota Semarang, Yogyakarta, dan Surakarta dengan Pendekatan GSTAR

Tugas Akhir ini menyajikan hasil penelitian dari pemodelan inflasi di kota Semarang, Yogyakarta, dan Surakarta dengan pendekatan GSTAR (Generalized Space Time Autoregressive). Metode GSTAR adalah pemodelan time series multivariate yang memperhatikan efek spasial. Pengertian inflasi sendiri adalah proses meningkatnya harga barang dan jasa secara umum dan bersifat terus menerus. Laju inflasi harus dapat dikendalikan oleh Pemerintah karena dapat membuat stabilitas perekonomian terganggu. Dalam penelitian ini, pemodelan GSTAR meliputi dua model yaitu model GSTAR dengan menggunakan semua parameter, dan model GSTAR yang hanya menggunakan parameter yang signifikan. Pembobot yang digunakan dalam penelitian ini meliputi bobot seragam, bobot invers jarak, dan bobot normalisasi korelasi silang. Hasil pemodelan menunjukkan bahwa model terbaik yang mempunyai nilai RMSE terkecil di kota Semarang adalah dengan bobot normalisasi korelasi silang menggunakan parameter yang signifikan. Sedangkan untuk inflasi di kota Yogyakarta dan Surakarta model terbaiknya adalah dengan bobot seragam menggunakan parameter yang signifikan

Basic physical parameters of a selected sample of evolved stars

We present the detailed spectroscopic analysis of 72 evolved stars, including the [Fe/H] determination for the whole sample. These metallicities, together with the Teff values and the absolute V magnitude derived from Hipparcos parallaxes, are used to estimate basic stellar parameters (ages, masses, radii, (B-V)o and log g using theoretical isochrones and a Bayesian estimation method. The (B-V)o values so estimated turn out to be in excellent agreement with the observed (B-V), confirming the reliability of the (Teff,(B-V)o) relation used in the isochrones. The estimated diameters have been compared with limb darkening-corrected ones measured with independent methods, finding an agreement better than 0.3 mas within the 1-10 mas interval. We derive the age-metallicity relation for the solar neighborhood; for the first time such a relation has been derived from observations of field giants rather than from open clusters and field dwarfs and subdwarfs. The age-metallicity relation is characterized by close-to-solar metallicities for stars younger than ~4 Gyr, and by a large [Fe/H] spread with a trend towards lower metallicities for higher ages. We find that the [Fe/H] dispersion of young stars (less than 1 Gyr) is comparable to the observational errors, indicating that stars in the solar neighbourhood are formed from interstellar matter of quite homogeneous chemical composition. The three giants of our sample which have been proposed to host planets are not metal rich, what is at odds with those for main sequence stars. However, two of these stars have masses much larger than a solar mass so we may be sampling a different stellar population from most radial velocity searches for extrasolar planets. We also confirm that the radial velocity variability tends to increase along the RGB.Comment: 17 pgs, 19 fig

Studi Eksperimen Penerapan Cat Pada Plywood Dengan Kuas

The needs of plywood as industrial raw materials increased along with the development of the usefulness of plywood in human life. This study took the subject of experimental of paint finishing with brush that is applied to the plywood. In wood process, finishing is a very important stage. Finishing process is commonly known as paint application process. Type of paint is varied, depends on the constituent materials, USAbility to location of use. Type of paint chosen in this study is oil paint, duco, latex, acrylic, and epoxy This research using qualitative and quantitative methods in which this research aims to know the character (power test viscocity, ,adhesive potensial, gloss intensity and dry resources) each type of paint on the deployment process of paint on plywood with a brush, as well as find out the most suitable type of paint applied to plywood epoxy paint which is obtained from the results of testing

Televisi Dan Masyarakat Adat

: The emergence of ethnic diversity in Indonesian television is potential to raise the variety of media content. However, the tendency of Indonesian television to dwell in entertainment program based on rating and market share has caused a serious loss of the ethnic values and erase the potential. Through the perspective of intercultural communication, Standpoint Theory and the study of media representations, this paper describes the deceptive use of ethnic value in media. As a proof, “Ethnic Runawayâ€, one of the programs depicting ethnic values in Indonesian national television, is not suitably used and is still dominated by urban society perspective

Pengaruh Penggunaan E-learning Terhadap Kinerja Dosen Dalam Kegiatan Mengajar (Studi Pada Dosen Fakultas Ilmu Administrasi Universitas Brawijaya)

The purpose of this study to determine the effect of the use of e-learning on the performance lecture. This research is explanatory research with quantitative. Sampel approach in this study is a lecturer at the Faculty of Administrative Science 58 respondents. Used as a technique accidental sampling technique in this study. Descriptive statistical analysis and path analysis were used to analyze the research hypothesis. The results of the study reveals that there is significant influence either directly or indirectly, so it can be concluded that the use of e-learning can affect the performance of lecturers in teaching to students

Citra Partai Hati Nurani Rakyat (Hanura) Pasca Deklarasi Calon Presiden Dan Calon Wakil Presiden Wiranto-Hary Tanoesoedibjo Di Harian Seputar Indonesia Dan Media Indonesia

Penelitian ini dilakukan untuk mengetahui bagaimana citra Partai Hanura pasca deklarasi Calon Presiden dan Calon Wakil Presiden, Wiranto dan Hary Tanoesodibjo melalui surat kabar Seputar Indonesia dan Media Indonesia. Fokus penelitian ini adalah pemaknaan pesan dalam pemberitaan Partai Hanura yang dilakukan oleh media partisan dan non partisan untuk membentuk citra di masyarakat. Metode yang digunakan adalah analisis isi kualitatif Hsieh &amp; Shannon dengan pendekatan directed content analysis melalui prosedur induksi. Hasil penelitian ini adalah, untuk Seputar Indonesia Partai Hanura digambarkan sebagai partai yang nasionalis, partai yang jujur, partai Perubahan, dan untuk Media Indonesia partai yang kera

Analisa Pengaruh Service Quality Dan Customer Relationship Management Terhadap Customer Loyalty Dengan Customer Satisfaction Sebagai Variabel Intervening Di Kampoeng Kidz, Batu-Jawa Timur

Seiring dengan bertumbuhnya tempat wisata di Indonesia terutama tempat wisata edukasi, maka diperlukan suatu USAha agar sebuah tempat wisata edukasi dapat bertahan pada tempat di bidang jasa tersebut. Penelitian ini dilakukan untuk menganalisis pengaruh Service Quality dan Customer Relationship Management terhadap Loyalitas Pelanggan dengan menggunakan mediasi kepuasan pelanggan. Penelitian ini diukur melalui beberapa indikator dari variabel-variabel tersebut. Tujuannya adalah untuk mengetahui bagaimana pengaruh variabel-variabel tersebut terhadap kepuasan konsumen dan loyalitas konsumen.Penelitian ini merupakan penelitian eksplanatori kausal yang dilakukan secara kuantitatif. Seluruh data yang ada dalam penelitian ini didapatkan melalui metode wawancara dengan alat bantu kuisioner. Data kemudian diolah dengan menggunakan metode Structural Equation Model (SEM)