{"title":"C","authors":"David Anthony","doi":"10.1515/9783110632903-004","DOIUrl":"https://doi.org/10.1515/9783110632903-004","url":null,"abstract":"We present a new method for determining the Galactic gravitational potential based on forward modeling of tidal stellar streams. We use this method to test the performance of smooth and static analytic potentials in representing realistic dark matter halos, which have substructure and are continually evolving by accretion. Our FAST-FORWARD method uses a Markov Chain Monte Carlo algorithm to compare, in six-dimensional phase space, an “observed” stream to models created in trial analytic potentials. We analyze a large sample of streams that evolved in the Via Lactea II (VL2) simulation, which represents a realistic Galactic halo potential. The recovered potential parameters are in agreement with the best fit to the global, present-day VL2 potential. However, merely assuming an analytic potential limits the dark matter halo mass measurement to an accuracy of 5%–20%, depending on the choice of analytic parameterization. Collectively, the mass estimates using streams from our sample reach this fundamental limit, but individually they can be highly biased. Individual streams can both underand overestimate the mass, and the bias is progressively worse for those with smaller perigalacticons, motivating the search for tidal streams at galactocentric distances larger than 70 kpc. We estimate that the assumption of a static and smooth dark matter potential in modeling of the GD-1and Pal5-like streams introduces an error of up to 50% in the Milky Way mass estimates.","PeriodicalId":361842,"journal":{"name":"Australian Dictionary of Biography, Volume 19","volume":"112 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131025718","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"H","authors":"R. Waterhouse","doi":"10.1002/9781118542842.ch8","DOIUrl":"https://doi.org/10.1002/9781118542842.ch8","url":null,"abstract":"Puji 1610572 effect of reading literacy on interest read students class V SDN 17 Tanjungpandan. Thesis Teacher Education Elementary School, and 2020. Education serves to help learners in their development, namely the development of all potentials, skills, and characteristics in a positive direction, both for himself and for his own environment. In education there is a learning process, one of the important points is reading. In teaching and learning activities are not separated from reading activities. Reading is one of the most important steps in determining the success or absence of the expected teaching and learning process.Therefore, the importance of reading culture is necessary for students to be accustomed to reading activities and to have a sense of awareness of their needs for the book. The purpose of this research is to know the significant effect of reading literacy on the interest of read participants in V. Negeri 17 District Elementary School 17th Tanjungpandan. The data collection techniques used in this study are quantitatively descriptive, with functional cholineration research design. In data collection, data collected using questionnaire questionnaires and structured interviews as supporting data with the number of respondents all students of the class V SDN 17 Tanjungpandan as many as 55 students. The results of the analysis obtained in this study showed that there is a significant influence between reading literacy on interest read students known value Thitung 4.031 > 2.005 This or Thitung value is greater than this with error status of 5% with the significance of 0.000 < 0.05 so that H 0 is rejected and H a accepted, there is an influence of 37.2% while the 62.8% is determined by other factors that It can then be concluded that from this study there was a significant influence of reading literacy towards Mina's reading of learners.","PeriodicalId":361842,"journal":{"name":"Australian Dictionary of Biography, Volume 19","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130549778","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"J","authors":"David Tunley","doi":"10.1515/9783110608144-079","DOIUrl":"https://doi.org/10.1515/9783110608144-079","url":null,"abstract":": Non-invasive range measurement of particle beams is important to prevent deviation of the irradiated area in particle therapy. In this study, we made an experiment of imaging carbon-ion beams by setting the projection ranges into an acrylic target from 4.29 cm to 7.65 cm by a pitch of 0.21 cm. Secondary electron bremsstrahlung (SEB) generated on the beam trajectories were detected for the imaging by use of a pinhole camera system consisting of a pinhole collimator and a position-sensitive cadmium-telluride semiconductor detector (CdTe imager). Beam images were acquired, and their profiles along the longitudinal axis were numerically analyzed, to obtain a suitable parameter that was strongly correlated with the set range. Then we could propose a scheme to measure the particle beam range in the target during irradiation by use of the CdTe imager. As a result, the range shift can be measured in the case of the acrylic target with an accuracy of 0.1 cm.","PeriodicalId":361842,"journal":{"name":"Australian Dictionary of Biography, Volume 19","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1921-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131858601","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"R","authors":"Bryan A Woolcock","doi":"10.2307/j.ctv1j9mjkz.26","DOIUrl":"https://doi.org/10.2307/j.ctv1j9mjkz.26","url":null,"abstract":"","PeriodicalId":361842,"journal":{"name":"Australian Dictionary of Biography, Volume 19","volume":"127 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122484879","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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