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431 results on '"Lehmann, Steffen"'

2. Urban heat mitigation by green and blue infrastructure: Drivers, effectiveness, and future needs

Author

Kumar, Prashant, Debele, Sisay E., Khalili, Soheila, Halios, Christos H., Sahani, Jeetendra, Aghamohammadi, Nasrin, Andrade, Maria de Fatima, Athanassiadou, Maria, Bhui, Kamaldeep, Calvillo, Nerea, Cao, Shi-Jie, Coulon, Frederic, Edmondson, Jill L., Fletcher, David, Dias de Freitas, Edmilson, Guo, Hai, Hort, Matthew C., Katti, Madhusudan, Kjeldsen, Thomas Rodding, Lehmann, Steffen, Locosselli, Giuliano Maselli, Malham, Shelagh K., Morawska, Lidia, Parajuli, Rajan, Rogers, Christopher D.F., Yao, Runming, Wang, Fang, Wenk, Jannis, and Jones, Laurence

Published
2024
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8. Optimization of Urban Cooling Strategies for Parking Lots in Hot and Dry Climates: Case Study of Las Vegas and Adelaide

Author

Sharifi, Ehsan, Zawarus, Phillip, Lehmann, Steffen, Dahiya, Bharat, Series Editor, Kirby, Andrew, Editorial Board Member, Friedberg, Erhard, Editorial Board Member, Singh, Rana P. B., Editorial Board Member, Yu, Kongjian, Editorial Board Member, El Sioufi, Mohamed, Editorial Board Member, Campbell, Tim, Editorial Board Member, Hayashi, Yoshitsugu, Editorial Board Member, Bai, Xuemei, Editorial Board Member, Haase, Dagmar, Editorial Board Member, Enteria, Napoleon, editor, Santamouris, Matteos, editor, and Eicker, Ursula, editor

Published
2021
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18. Understanding and Quantifying Urban Density Toward more Sustainable City Form

Author

Lehmann, Steffen, Bellomo, Nicola, Series Editor, Tezduyar, Tayfun E., Series Editor, Aoki, Kazuo, Editorial Board Member, Bazilevs, Yuri, Editorial Board Member, Chaplain, Mark, Editorial Board Member, Degond, Pierre, Editorial Board Member, Deutsch, Andreas, Editorial Board Member, Gibelli, Livio, Editorial Board Member, Herrero, Miguel Ángel, Editorial Board Member, Hughes, Thomas J.R., Editorial Board Member, Koumoutsakos, Petros, Editorial Board Member, Prosperetti, Andrea, Editorial Board Member, Rajagopal, K.R., Editorial Board Member, Takizawa, Kenji, Editorial Board Member, Tao, Youshan, Editorial Board Member, van Brummelen, Harald, Editorial Board Member, D'Acci, Luca, editor, and Batty, Michael, Foreword by

Published
2019
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21. Introduction

Author

Raimo, Antonino Di, primary, Lehmann, Steffen, additional, and Melis, Alessandro, additional

Published
2020
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32. Reimaging the Library of the Future. From Social Condenser and Community Hub to Regenerative Design.

Author

Lehmann, Steffen

Subjects
*PUBLIC libraries, *LIBRARY design & construction, *PUBLIC architecture, *INTERNET searching, *LIBRARIES, *SUSTAINABLE design
Abstract

The primary objective of this article, an architectural forecasting opinion piece written by a design expert, is to investigate the various models of public library buildings and explore the continuous evolution of library design (presenting valuable information for anyone planning a library). The main question explored in this article is: What will be the design characteristics of the next-generation library? Methods used include precedent analysis, cases selected from an international list of 50 libraries built between 2010–2023 following a web search using the phrase "public library architecture" and analyzing these cases for repeated thematic similarities. Three similarities are identified. [ABSTRACT FROM AUTHOR]

Published
2024
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41. Design and Characterization of a Variable Gain D-Band LNA for Optimized Link Budgeting for a 6G Receiver in 22FDX

Author

Artz, Patrick James, Huy Le, Quang, Huynh, Dang Khoa, Scholz, Philipp, Kampfe, Thomas, Lehmann, Steffen, Mausolf, Thomas, and Gerfers, Friedel

Abstract

This article describes the design and characterization of a fully differential $D$ -band low noise amplifier (LNA) with a measured gain of 9.0–18.0 dB at 153.5 GHz over a 3-dB bandwidth of 10.8 GHz. A minimum noise figure (NF) of 7.9 dB is achieved, measured with the cold-noise source method using a source tuner for noise parameter extraction to enable high accurate NF measurements. The extracted noise parameters allow the source impedance sensitivity to be calculated, with an NF degradation of less than 1.2 dB demonstrated for a source reflection $|\Gamma _{s}|\leq 0.3$ . Using the back gate control of the 22-nm fully depleted silicon on insulator (FDSOI) technology enables a passive gain control range of 9 dB, reducing the NF and compression point degradation while scaling the power consumption, thanks to optimal transistor biasing. The measured LNA parameters such as gain, NF, compression, and bandwidth are applied in a link budget analyzer to verify sufficient signal-to-noise and distortion ratio (SNDR) for a 100-GBit/s receiver.

Published
2024
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42. Analytical Modeling of Cryogenic Subthreshold Currents in 22-nm FDSOI Technology

Author

Han, Hung-Chi, Zhao, Zhixing, Lehmann, Steffen, Charbon, Edoardo, and Enz, Christian

Abstract

The transistor compact model is crucial but has yet to mature for cryogenic electronics. This paper presents a sophisticated analytical model of the MOSFET subthreshold current at cryogenic temperatures, accounting for the thermionic, hopping, source-to-drain tunneling transports, and the Gaussian-distributed interface traps to bridge the gap. Hopping and source-to-drain tunneling transports can co-exist in the subthreshold regime, leading to subthreshold saturation strongly correlated to channel length and drain voltages.

Published
2024
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