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ウエッブサイトを利用した經濟敎育の試み : 日本における經濟敎育の一つの實驗 An experiment of economic education in Japan
新井明 한국경제교육학회 2002 경제교육연구 Vol.9 No.1
This report is an economic education experiment in e-Learning, an educational system using the Web. The program titled "Economics and Me" contains the following three points; 1) the focus is on junior high and high school students; (2) the experimental e-Learning system consists of research and volunteers; (3) the current public education system continues to use studies in the curriculum while giving relative independence. We created "Economics here and there," a place to freely discuss the present situation of Japanese economies, and we participated in "the Nikkei Stock League." Classes began in June 2002. There were 300 students in the first (trial run/semester). "This Month's Problem" and "Economics Here and There" until present we discuss following problems: "Why the empty seats at the World Cup?" "Opportunity cost of Dam-free policy" "Will McDonald's price increase work?" "Is a hedge fund bad?" and so on. As for the possibility of e-Learning in a typical Economics Classroom, there are four points: (1) e-Learning has the possibility to make a big change in the current educational system. (2) Problem-solving discussions through e-Learning is an effective measure of economic education. (3) Through e-Learning, procurement of an able staff who can ask questions to draw out responses is a decisively significant factor in making Economics Class a success. (4) In e-Learning, it is important for the content to present both theoretical and practical aspects in economic education. The limits and problems of e-Learning, there are two points: (1) There is only a particular age at which an Economics Class is both effective and interesting. (2) It is difficult to continue studying using e-Learning. In conclusion, I would like to suggest the possibility of e-Learning for Economics Class in Korea. I have heard that Internet is spreading at a much faster rate in Korea than in Japan. For that reason, e-Learning is especially suited to Korea. In an open society like Korea, its desirable to perform tests with a varied and diverse public education. Even in Economics Class, performing such trials in a public school will further promote economics.
Post-Event Effects: A New Perspective on Giveaway Items Distributed at Sporting Events
Akira Asada,Akiko Arai 글로벌지식마케팅경영학회 2023 Journal of Global Sport Management Vol.8 No.1
The purpose of this study was to examine how giveaway items distributed at sporting events are used afterward. The results of the content analysis of survey responses and a series of regression analyses showed that people often use, display, and talk about giveaway items after sporting events and that sports teams can encourage consumers to engage in those behaviors by improving the items’ functional, symbolic, and social value. Specifically, when sports teams give away apparel items, they should consider (a) designing items that are useful for social events, errands, or physical activities; (b) offering various size options; and (c) designing fashionable items. When sports teams create memorabilia, they should consider (a) adding a unique function to the items and (b) designing items that reflect unique experiences and identities. As one of the first to examine the post-event effects of giveaway items, the present study provides unique theoretical and practical implications.
( Masataka Arai ),( Akira Ishii ),( Masahiro Saito ) 한국액체미립화학회 2005 한국액체미립화학회 학술강연회 논문집 Vol.2005 No.-
Atomization behavior of a single droplet impinged on surface oscillating with ultra-sonic frequency of 20 kHz was investigated as a new method of fine-spray formation. Distilled water, ethanol and 50-80wt% glycerin solution were used as the test liquids to find the effects of viscosity and surface tension on ultra-sonic atomization. The amplitude of oscillation A and the droplet volume Vd were changed between A =25-125μm, Vd = 4-20 mm3 respectively. As the result, it was found that a fine spray was formed after the droplet impingement when the amplitude was smaller than A =50μm, while ligament and large droplets were formed at larger amplitude than A =50μm. The SMD of the spray after impingement was about D32=70μm when the amplitude was small, but the SMD became large with increase of the amplitude. Also, at low amplitude of A =25μm, the surface energy of spray after impingement increased remarkably compared with that of droplet before impingement. On the contrary, at amplitude of A >50μm, the kinetic energy after impingement has exceeded the surface energy. Namely, the oscillation energy was acted for rebounding of droplet rather than the atomization of droplet. The atomization efficiency decreased exponentially with increasing the amplitude of oscillation independent of the physical properties of test liquids. Thus, the low amplitude of oscillation could allow fine atomization by the disintegration of liquid film after the droplet impingement.
Fitting of Light Curves for Microquasar V4641 Sgr
Shinji Nishiyama,Jun Fukue,Akira Arai,Kenya Watarai 한국물리학회 2006 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.49 No.4
We report the .tting results of theoretical light curves for microquasar V4641 Sgr. In this study, we apply a new accretion disk model that is presented by Fukue to observed R-band light curves of V4641 Sgr. The new model takes into account the geometrical thickness of the disk, so it may be able to describe the two deep minima of the observed light curves. The best-.t parameters show that the system has a relatively high inclination angle, i = 75±, and that the mass accretion rate is around the Eddington rate. We propose the importance of the geometry of the accretion disk to explain the deep minima observed in this object.
Local interaction imaging by SiGe quantum dot probe
정연길,Masato Hirade,Ryohei Kokawa,Hirofumi Yamada,Kei Kobayashi,Noriaki Oyabu,Toyoko Arai,Akira Sasahara,Masahiko Tomitori 한국물리학회 2012 Current Applied Physics Vol.12 No.2
Local interaction imaging of cleaved InAs surface (110) using a high aspect ratio (HAR) SiGe quantum dot (QD) probe was demonstrated by frequency-modulation mode noncontact atomic force microscopy under atmospheric pressure. The local contrast image with pronounced brightness is mainly attributed to no contact potential difference between the HAR SiGe-QD probe apex and the sample surface, and low frequency-change of the HAR SiGe-QD probe.
SPECTRAL EVOLUTION OF NOVAE IN THE NEAR-INFRARED BASED ON AKARI OBSERVATIONS
ITSUKI SAKON,TAKASHI ONAKA,Fumihiko Usui,SAYAKA SHIMAMOTO,RYOU OHSAWA,Takehiko Wada,Hideo Matsuhara,AKIRA ARAI 한국천문학회 2017 天文學論叢 Vol.32 No.1
We have carried out the near-infrared spectroscopic observations of recent classical novae (e.g., V2468Cyg, V1280Sco) within a few years from the outburst with AKARI as a part of AKARI Open Time Observing Program for Phase 3-II "Spectral Evolution of Novae in the Near-Infrared based on AKARI Observations (Proposal ID: SENNA)". The homogeneous datasets of near-infrared spectra from 2.5 $\mu$m to 5 $\mu$m with AKARI/IRC collected in this program are useful to infer the physical conditions of the shell formed by the ejected materials, to examine the chemical properties of the ejecta gas, and to examine the properties of dust formed in the nova ejecta.
Ishiguro, Masateru,Kuroda, Daisuke,Hasegawa, Sunao,Kim, Myung-Jin,Choi, Young-Jun,Moskovitz, Nicholas,Abe, Shinsuke,Pan, Kang-Sian,Takahashi, Jun,Takagi, Yuhei,Arai, Akira,Tokimasa, Noritaka,Hsieh, He IOP Publishing 2014 The Astrophysical journal Vol.792 No.1
<P>We investigated the magnitude-phase relation of (162173) 1999 JU3, a target asteroid for the JAXA Hayabusa 2 sample return mission. We initially employed the International Astronomical Union's H-G formalism but found that it fits less well using a single set of parameters. To improve the inadequate fit, we employed two photometric functions: the Shevchenko and Hapke functions. With the Shevchenko function, we found that the magnitude-phase relation exhibits linear behavior in a wide phase angle range (alpha = 5 degrees-75 degrees) and shows weak nonlinear opposition brightening at alpha < 5 degrees, providing a more reliable absolute magnitude of H-V = 19.25 +/- 0.03. The phase slope (0.039 +/- 0.001 mag deg(-1)) and opposition effect amplitude (parameterized by the ratio of intensity at alpha = 0 degrees.3 to that at alpha = 5 degrees, I(0 degrees.3)/I(5 degrees) = 1.31 +/- 0.05) are consistent with those of typical C-type asteroids. We also attempted to determine the parameters for the Hapke model, which are applicable for constructing the surface reflectance map with the Hayabusa 2 onboard cameras. Although we could not constrain the full set of Hapke parameters, we obtained possible values, w = 0.041, g = -0.38, B-0 = 1.43, and h = 0.050, assuming a surface roughness parameter <(theta)over bar> = 20 degrees. By combining our photometric study with a thermal model of the asteroid, we obtained a geometric albedo of p(v) = 0.047 +/- 0.003, phase integral q = 0.32 +/- 0.03, and Bond albedo A(B) = 0.014 +/- 0.002, which are commensurate with the values for common C-type asteroids.</P>