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4 results on '"Ferdinand Patt"'

1. Design and Characterization of the ALMA Band 5 Vacuum Window

Author

Axel Murk, Pavel A. Yagoubov, Ferdinand Patt, and Arne Schroder

Subjects
Physics, Radiation, Terahertz radiation, business.industry, 530 Physics, Window (computing), 500 Science, 620 Engineering, 01 natural sciences, Finite element method, 010309 optics, Optics, 0103 physical sciences, Transmittance, Reflection (physics), Return loss, Millimeter, Electrical and Electronic Engineering, Engineering design process, business, 010303 astronomy & astrophysics
Abstract

This paper summarizes the electromagnetic design process of the vacuum window for the Atacama Large Millimeter/sub-millimeter Array (ALMA) Band 5 (163-211 GHz). We have carried out investigations by means of numerical simulations as well as reflection and transmission measurements. Simulations were performed using the finite element method, an efficient quasi-analytical technique, and rigorous coupled-wave analysis. We used an injection-molded vacuum window prototype as a starting point of the design process and investigated deterioration in the electromagnetic performance caused by different types of manufacturing artifacts. Following these analyses, an optimization of the window has been performed based on simulations. We measured the reflectivity and transmittance of the newly designed window and this paper demonstrates that the optimized window exhibits a return loss better than -20 dB, as required by the ALMA specifications.

Published
2016
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2. THE YUAN TSEH LEE AMiBA PROJECT

Author

K. Y. Lo, Keiichi Umetsu, Jeremy Lim, Pablo Altimirano, Michael Kesteven, Huei Wang, Yen Shen Lin, Mark Birkinshaw, Yuh-Jing Hwang, Sandor M. Molnar, Hiroaki Nishioka, Jiun-Huei Proty Wu, Ferdinand Patt, Derek Kubo, W. Y. Pauchy Hwang, Tah-Hsiung Chu, Tzihong Chiueh, Jeffrey B. Peterson, Pierre Martin-Cocher, Homin Jiang, Chi Wei Huang, Patrick M. Koch, Kai-Yang Lin, Katy Lancaster, Fabi Romano, Guo-Chin Liu, Ming-Tang Chen, Robert N. Martin, Chan Gyung Park, Paul T. P. Ho, Chao-Te Li, Cheng Jiun Ma, Su-Wei Chang, Yao De Huang, Kin-Wang Ng, Tzi Dar Chiueh, Philippe Raffin, Ke Jun Chen, Haida Liang, Chih Chiang Han, Yao Wei Liao, Fu-Cheng Wang, and Cha Hao Chang

Subjects
Physics, Nuclear and High Energy Physics, Astrophysics::High Energy Astrophysical Phenomena, Cosmic microwave background, Astrophysics::Instrumentation and Methods for Astrophysics, Compton scattering, General Physics and Astronomy, Astronomy, Astronomy and Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics, Galaxy, Cosmology, law.invention, Telescope, Interferometry, law
Abstract

The Array for Microwave Background Anisotropy is a 7-element interferometer sited on Mauna Loa, Hawaii. The seven 60cm telescopes are mounted on a 6-meter platform, and operates at 3mm wavelength. In October 2006, the telescope was officially dedicated and renamed as the Y. T. Lee AMiBA. During 2007, scientific operations have begun, after a long process of calibration and testing. At the time of this meeting, six clusters of galaxies have been detected and mapped via the inverse Compton scattering of the Cosmic Microwave Background radiation, also known as the Sunyaev-Zel'dovich Effect.

Published
2008

3. Potensi Rumput Laut di Perairan Seram Timur, Kabupaten Seram Bagian Timur , Maluku

Author

Marsya Jaqualine Rugebregt, Ferdinand Pattipeilohy, Caleb Matuanakotta, Ahmad Ainarwowan, Malik Sudin Abdul, and Ferdimon Kainama

Subjects
makrolgae, pulau keffing, chorophyta, phaeophyta, rhodophyta, Environmental sciences, GE1-350
Abstract

Makroalgae termasuk bagian dari flora yang terdiri atas banyak jenis dan memiliki peranan penting pada lingkungan laut salah satunya adalah Perairan Pulau Keffing di Kecamatan Seram bagian Timur, Kabupaten Seram Bagian Timur. Penelitian dilaksanakan pada November 2017. Metode yang digunakan pada penelitian ini adalah metode eksplorasi dengan pengambilan sampel secara line transek kuadrat. Lokasi pengambilan sampel dibedakan menjadi tiga stasiun. Jumlah jenis algae yang dijumpai dalam penelitian ini sebanyak 16 jenis yang terdiri atas 9 jenis dari kelas algae Chlorophyta, satu jenis dari kelas Phaeophyta dan enam jenis dari kelas Rhodophyta. Jenis-jenis yang ditemukan memiliki potensi ekonomi, baik kepada lingkungan periaran maupun kepada manusia, namun pemanfaatannya belum dioptimalkan oleh masyarakat karena sebagian hanya dimanfaatkan untuk makanan. Dari hasil pengukuran parameter lingkungan menunjukan masih sesuai bagi pertumbuhan rumput laut. Perairan pulau Keffing dan sekitarnya memiliki kemungkinan untuk dikembangkannya kegiatan usaha budidaya rumput laut serta pengembangan pengolahan potensinya. Abstract Macroalgae is part of the flora consists of many types and has an important role in the marine environment, one of which is the waters of Keffing Island in the East Seram District, East Seram District. The research was carried out in November 2017. The method used in this study is an exploratory method by taking a sample using a quadratic transect line. The sampling locations were divided into three stations. The number of algae species found in this study was 16 species consisting of 9 species from the Chlorophyta class, one from the Phaeophyta class, and six species from the Rhodophyta class. The species found have economic potential, both for the aquatic environment and for humans, but their utilization has not been optimized by the community because some of them are only used for food. The results of the measurement of environmental parameters show that it is still suitable for seaweed growth. The waters of Keffing Island and its surroundings have the possibility for the development of seaweed cultivation activities and the development of processing potential.

Published
2021
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4. The Yuan Tseh Lee AMiBA project

Author

Ho, Paul T. P., Pablo Altimirano, Mark Birkinshaw, Su Wei Chang, Cha Hao Chang, Ke Jun Chen, Mingtang Chen, Tzi Dar Chiueh, Tzihong Chiueh, Tah Hsiung Chu, Chih Chiang Han, Chi Wei Huang, Yao De Huang, Pauchy Hwang, W. Y., Yuh Jing Hwang, Homin Jiang, Michael Kesteven, Patrick Koch, Derek Kubo, Katy Lancaster, Chao Te Li, Haida Liang, Yao Wei Liao, Jeremy Lim, Yen Shen Lin, Kai Yang Lin, Guo Chin Liu, Kwok Yung Lo, Cheng Jiun Ma, Pierre Martin-Cocher, Martin, Robert N., Sandor Molnar, Kin Wang Ng, Hiroaki Nishioka, Chan Gyung Park, Ferdinand Patt, Peterson, Jeffrey B., Philippe Raffin, Fabi Romano, Huei Wang, Keiichi Umetsu, Fu Cheng Wang, and Jiun Huei Proty Wu

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