The 21-cm hyperfine line of neutral hydrogen from the high-redshift Universe (6 < z 20) promises to probe a new era in cosmology, the epoch of reionization (EoR). It will provide more detailed, less ambiguous and more complete three-dimensional informations than other observations of the EoR (such as the QSO absorption lines, or the secondary scattering of CMB). It also traces many different physical processes. The next generation radio telescopes, SKA and its precursors, will start to operate within one decade, and will observe this signal. Numerical simulations predicting the 21-cm emission are important to optimize the design of the instruments, and interpret the observations. In this work, we develop a continuum radiative transfer part for the LICORICE cosmological code to study the epoch of reionization, where radiative transfer is an essential tool. We use a Monte-Carlo ray-tracing algorithm on an adaptive grid. Several tests, both for static density field cases and radiative hydrodynamic cases have been performed to validate the code. Then we compute the 21-cm signal during the EoR, which provides a direct probe on reionization and contains a lot of informations on the sources of ionization and heating.

A number of physical phenomena are predicted to operate in astrophysical settings theoretically and may be crucial for understanding the nature of astrophysical objects. Magnetorotational instability (MRI) and magnetic dynamos are examples of such processes believed to be the key to the origin and growth of magnetic fields in galaxies, accretion flows, stars, planets and Universe as a whole. Although firmly predicted and verified in theory, MRI has not been robustly reproduced in a physical laboratory here on Earth. Recently, we discovered and successfully observed the analogue of MRI in a Couette-Taylor Flow of Polymer Fluids. A limited cases of a constrained dynamo have been reproduced in Riga and Karlsruhe experiments. There are a number of groups working and building laboratory experiments to verify and study MRI and dynamos. I will review the progress made in these experiments, including works that I have been involved with.

During the past decade, astronomy has undergone a period of rapid growth in Taiwan. A number of groups have been established at the universities as well as at the Academia Sinica. We will review the current progress on a number of projects including SMA, AMiBA, TAOS, CFHT/WIRCam, ALMA, and Subaru/HSC.

In this presentation, I will be talking about the optical designs and analyses of the WFMOS high-resolution spectrograph(HRS). WFMOS HRS is the next generation instrument of the Gemini/Subaru consortium that aims to conduct spectroscopic studies of the formation and evolution of the Galaxy, the study often termed as \\\"Galactic Archaeology Survey\\\". Consisting of twin (or quadruple) spectrographs, HRS is to be fed by 1500 fiber optics distributed over the field of view (1.5 degrees in diameter) of the HyperSuprime Camera (HSC) on the 8m Subaru telescope. The wavelength coverage is from 420nm to 900nm. Following a brief introduction to the main science objectives of the HRS instrument, the presentation will discuss issues involved in the choice of diffraction gratings, camera optics, and collimator designs as well as trade-off study results in terms of system throughput and image quality. Current status and future prospect of the project will also be covered.

The supermassive star, Eta Carinae, has attracted people\\/s attention with its picturesque bipolar nebula structure seen in Hubble space telescope images. The bipolar nebula was produced through an enormous outburst in 1840\\/s when Eta Carinae became the 2nd brightest star in the sky. This event, which ejected more than ~10 Msolar, was a signature of large-scale, unstable mass loss episodes at the end of a massive star\\/s life. With the advent of space telescopes, Eta Carinae has been observed in great detail. However, direct emission from the central star has never been detected, because it is heavily shrouded by the bipolar nebula. Emission from the central region indicates that Eta Carinae houses a binary system with a highly eccentric 5.5 year orbit, which perhaps comprises an evolved star with ~90 Msolar and a (possibly) a near-main-sequence O star with ~30 Msolar. Among multi-wavelength observations, X-ray emission varied dramatically with the orbital period, showing a flux increase around the periastron passage followed by a strong flux drop by a factor of 100 for three months thereafter. The flux variation is basically explained by thin-thermal plasma emission produced by the collision of winds from the two stars (wind-wind collision: WWC), but the cause of the flux drop is controversial. The two leading hypotheses are an \\\"eclipse\\\" of X-ray plasma by the thick primary stellar wind or a collapse of the WWC plasma. Resolving this problem is important for solving the process of mass loss from massive stars, and in finding the property of the component stars. We present the latest view of this enigmatic object, focusing on the X-ray observations around the last periastron passage in 2003. We also introduce upcoming campaign observations of Eta Carinae around the next periastron passage in early 2009.

In this talk, we would like to introduce how to describe wave turbulence for nonlinearly and wealky interacting despersive wave ensemble such as Hasselmann\\/s approach, smooth cumulant method, random phase approximation, and random phase and amplitude formalism which has been developed most lately. And we also introduce recent development in wave turbulence theory and application to Alfven wave.

CoRoT is a 27cm space telescope in a polar orbit that is capable of making ultra-precise photometric measurements of stars continuously for up to a maximum of 150 days. It has a dual purpose: asteroseismology of up to 10 bright (V=5-9 mag) stars and the photometric detection of transiting planets for 12.000 fainter stars (V=11-16 mag). It is the first space mission dedicated to the detection of extrasolar planets. It was successfully launched on 27 December 2006 and the telescope is working perfectly. Since launch CoRoT has been steadily returning light curves of unprecendented quality. I will give an overview of the current status of the mission and present some recent results, mostly highlighting the exoplanet discoveries. I will also for present results from addtional science conducted from the so-called exofield of CoRoT.

옛날 사람들은 물의 흐름을 이용하여 시간을 쟀는데 이것이 물시계의 시초다. 물시계는 해시계와 더불어 사용되었지만, 밤낮으로 시간을 알아내는 데는 물시계가 더 쓸모가 있어 동아시아를 비롯한 대부분의 문화권에서는 표준시계로 사용되었다. 조선 세종은 위정자의 임무의 하나인 관상수시를 제대로 실현하기 위해 조선의 실정에 맞는 수시(授時)제도를 갖추도록 여러 가지 정책을 세우고 구체적인 사업에 착수하였다. 그리고 그와 아울러 천문관측의 필요성을 느껴 그 일환으로 간의대를 만들고, 간의와 규표, 시보를 위한 보루각, 해시계 등의 여러 천문기구들을 제작, 설치하였다. 그 중의 하나가 자격루이다. 자격루는 물시계 시스템을 비롯하여 아날로그/디지털 변환기(방목-동판), 에너지 증폭기구(철환방출기구), 12시 시보장치(時機), 경점 시보장치(更點機) 등으로 이루어진 복합 시스템이다. 동아시아 전통의 3단 유입식(流入式) 물시계 기술과, 13세기 아랍에서 제작된 시계에서 아이디어를 얻은 시보장치의 기술, 그리고 한국 전래 기술의 융합으로 탄생된 자격루는 우리 풍토와 전통을 대변하는 한국성(韓國性)과 아울러 세계로 열린 보편성을 지닌 창의적인 발명품이다. 그러나 이렇게우리 역사는 물론, 15세기 동아시아 시계기술사, 오토메이션(자동화)과 로보틱스 역사의 한 장을 장식한 자격루이지만, 아쉽게도 1866년 병인양요의 와중에 소실되어 자격루 설계도는 전해오지 못하게 되었다. 지난 30년 동안 우리의 얼굴인 만 원권 지폐 속에 살아온 ‘물시계’는 세종 자격루의 후신이다. 이「보루각기」속의 자격루가 573년 만에 그 진면목을 우리 앞에 드러냈고, 연구를 시작한지 23년이라는 기나 긴 여정을 거친 후인 지난 2007년 11월말에 복원되었다. 이번 발표에서는 세종시대의 왕성했던 의표사업과 아울러 새로 복원한 자격루의 시스템과 복원과정을 설명하면서 한국의 전통과학기구들을 살펴보고자 한다.

If ultrahigh energy cosmic rays (UHECRs) originate from extragalactic sources, understanding the propagation of the charged particles through the magnetized large scale structure (LSS) of the universe is crucial in the search for astrophysical accelerators. Adopting a novel model based on turbulent dynamo, the strength of the intergalactic magnetic field is estimated from local dynamic properties of the gas flows in hydrodynamic simulations of a concordance LCDM universe. With the model magnetic field, the deflection angle and time delay are calculated for protons with $E > 10^{19}$ eV propagating through the large scale structure of the universe, as well as the energy loss due to interactions with cosmic background radiation. Implications of this study on the origin of UHECRs will be discussed.