The Experts below are selected from a list of 14778 Experts worldwide ranked by ideXlab platform
Valeria Rueda - One of the best experts on this subject based on the ideXlab platform.
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The Long-Term Effects of the Printing Press in sub-Saharan Africa
American Economic Journal: Applied Economics, 2016Co-Authors: Julia Cage, Valeria RuedaAbstract:This article investigates the long-term consequences of the Printing Press in the nineteenth century sub-Saharan Africa on social capital nowadays. Protestant missionaries were the first to import the Printing Press and to allow the indigenous population to use it. We build a new geocoded dataset locating Protestant missions in 1903. This dataset includes, for each mission station, the geographic location and its characteristics, as well as the Printing-, educational-, and health-related investments undertaken by the mission. We show that, within regions close to missions, proximity to a Printing Press is associated with higher newspaper readership, trust, education, and political participation. (JEL L82, N37, N77, N97, O17, O43, Z13)
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The LongTerm Effects of the Printing Press in SubSaharan Africa
2014Co-Authors: Julia Cage, Valeria RuedaAbstract:This article delves into the relationship between newspaper readership and civic attitudes, and its effect on economic development. To this end, we investigate the long-term consequences of the introduction of the Printing Press in the 19th century. In sub-Saharan Africa, Protestant missionaries were the first both to import the Printing Press technology and to allow the indigenous population to use it. We build a new geocoded dataset locating Protestant missions in 1903. This dataset includes, for each mission station, the geographic location and its characteristics, as well as the educational and health-related investments undertaken by the mission. We show that, within regions located close to missions, proximity to a Printing Press significantly increases newspaper readership today. We also document a strong association between proximity to a Printing Press and contemporary economic development. Our results are robust to a variety of identification strategies.
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The long Term Effects of the Printing Press in Sub Saharan Africa
2013Co-Authors: Julia Cage, Valeria RuedaAbstract:This article delves into the relationship between newspaper readership and civic attitudes, and its e↵ect on economic development. To this end, we investigate the long-term consequences of the introduction of the Printing Press in the 19th century. In sub-Saharan Africa, Protestant missionaries were the first both to import the Printing Press technology and to allow the indigenous population to use it. We build a new geocoded dataset locating Protestant missions in 1903. This dataset includes, for each mission station, the geographic location and its characteristics, as well as the educational and health-related investments undertaken by the mission. We show that, within regions located close to missions, proximity to a Printing Press significantly increases newspaper readership today. We also document a strong association between proximity to a Printing Press and contemporary economic development. Our results are robust to a variety of identification strategies.
Yasuhiko Muto - One of the best experts on this subject based on the ideXlab platform.
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Register control of rotogravure Printing Press. Application of nonlinear control theory to sectional drive Printing Press
Electronics and Communications in Japan, 2011Co-Authors: Tsuguaki Yoshida, Shinichiro Takagi, Yasuhiko Muto, Teilong ShenAbstract:This paper presents a nonlinear register control scheme for the latest type of rotogravure Printing Presses, referred to as the sectional drive system. In Printing Presses where each gravure cylinder is driven by an individual motor, tension fluctuations caused by an upstream register control generate register errors in downstream units. Therefore, development of a control system to reduce downstream register error propagation is a challenging issue for the Printing Presses. First, we propose a nonlinear coordinate transformation for the state variables in order to deal with the Printing Press dynamics easily. Then, based on the new coordinates, a nonlinear control law is designed with the Lyapunov stability theorem such that the register errors converge to zero. Finally. the performance of the proposed method is demonstrated by simulation and experiments carried out on a practical Printing Press, and a comparison with a conventional control method is also presented to show the effectiveness of the proposed control scheme. (C) 2010 Wiley Periodicals, Inc. Electron Comm Jpn, 94(1): 17-24, 2011; Published online in Wiley Online Library (wileyonlinelibrary.com). DOI 10.1002/ecj.10282
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ECC - Nonlinear feedback Printing positioning control for rotogravure Printing Press
2009 European Control Conference (ECC), 2009Co-Authors: Hiroyuki Komatsu, Tsuguaki Yoshida, Shinichiro Takagi, Tielong Shen, Yasuhiko MutoAbstract:In a multi-color Printing Press consisting of multi-Printing units, the dynamics of each unit are coupled and the signal propagation between two neighboring Printing units is always with delay. A challenging issue for control of the Printing Press is how to handle the web pass such that the multi colors are printed with high precision. This paper presents a delay-dependent nonlinear control approach to Printing positioning control in a three-color Printing Press. First, a nonlinear coordinate transformation is introduced to a state space model that describes the dynamics of the tension and the Printing error. Then, based on the new dynamical model, two feedback control schemes are proposed. A state feedback controller is designed such that tension errors and Printing errors converge to zero, and an output feedback controller is proposed to perform the state feedback control law without tension sensors. Furthermore, simulation and experiments are performed to demonstrate the effectiveness of the proposed control scheme.
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Modeling and Resister Control of Sectional Drive Gravure Printing Press
Transactions of the Japan Society of Mechanical Engineers. C, 2008Co-Authors: Tsuguaki Yoshida, Shinichiro Takagi, Yasuhiko Muto, Tielong ShenAbstract:In this paper, a method of modeling and control of a Printing Press is considered. In the recent standard gravure Printing Press called “sectional drive” with multi-units, register control causes register errors in the downstream units. The problem is not only the increase of the number of defections but also the complexity of adjusting procedure of controller parameters. Because of this, it is needed to introduce a new control system to shorten the total settling time. For this purpose, in this paper, a mathematical model of the sectional drive gravure Printing Press is proposed, and then, a cooperative control method using feedforward is designed in consideration of the relation between units. It turned out that this control system makes the total settling time short, and furthermore, using the mathematical model, the simulation based design method is established, which also shorten the time period of control system design procedure. The paper also presents some experimental results to show the validity of proposed mathematical model and control system.
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Register Control of Rotogravure Printing Press
IEEJ Transactions on Industry Applications, 2008Co-Authors: Tsuguaki Yoshida, Shinichiro Takagi, Yasuhiko Muto, Teilong ShenAbstract:This paper presents a nonlinear register control scheme for the latest type of rotogravure Printing Presses referred to as the sectional drive system. In the Printing Presses, where each gravure cylinder is driven by an individual motor, tension fluctuations caused by an upstream register control generate register errors in downstream units. Therefore, development of the control system to reduce the register error propagation to the downstream is a challenging issue in the Printing Press. First, we propose a nonlinear coordinate transformation for the state variables in order to deal with the Printing Press dynamics easily. Then, based on the new coordinates, a nonlinear control law is designed with the Lyapunov stability theorem such that the register errors converge to zero. Finally, the performance of the proposed method is demonstrated by simulation and experiment carried out on a practical Printing Press, and a comparison with a conventional control method is also presented to show the effectiveness of the proposed control scheme.
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Register Control of Sectional Drive Rotogravure Printing Press
Manufacturing Systems and Technologies for the New Frontier, 1Co-Authors: Tsuguaki Yoshida, Shinichiro Takagi, Yasuhiko Muto, Teilong ShenAbstract:In the latest type of rotogravure Printing Presses referred to as the sectional drive system, wherein each gravure cylinder is driven by an individual motor, tension fluctuations by an upstream register control generate register errors in downstream units. Hence, the introduction of new effective control system to prevent the generation of the downstream register errors is required. For this purpose, in this paper, a method of register control for Printing Presses has been proposed. First, a nonlinear coordinate transformation for the state variable of the Printing Press dynamics is proposed. Subsequently, based on the new coordinate system, a nonlinear control method is designed using the Lyapunov stability. Finally, the performance of the new control method is demonstrated by simulation and experimental results and comparing with a conventional PD control method.
Julia Cage - One of the best experts on this subject based on the ideXlab platform.
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The Long-Term Effects of the Printing Press in sub-Saharan Africa
American Economic Journal: Applied Economics, 2016Co-Authors: Julia Cage, Valeria RuedaAbstract:This article investigates the long-term consequences of the Printing Press in the nineteenth century sub-Saharan Africa on social capital nowadays. Protestant missionaries were the first to import the Printing Press and to allow the indigenous population to use it. We build a new geocoded dataset locating Protestant missions in 1903. This dataset includes, for each mission station, the geographic location and its characteristics, as well as the Printing-, educational-, and health-related investments undertaken by the mission. We show that, within regions close to missions, proximity to a Printing Press is associated with higher newspaper readership, trust, education, and political participation. (JEL L82, N37, N77, N97, O17, O43, Z13)
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The LongTerm Effects of the Printing Press in SubSaharan Africa
2014Co-Authors: Julia Cage, Valeria RuedaAbstract:This article delves into the relationship between newspaper readership and civic attitudes, and its effect on economic development. To this end, we investigate the long-term consequences of the introduction of the Printing Press in the 19th century. In sub-Saharan Africa, Protestant missionaries were the first both to import the Printing Press technology and to allow the indigenous population to use it. We build a new geocoded dataset locating Protestant missions in 1903. This dataset includes, for each mission station, the geographic location and its characteristics, as well as the educational and health-related investments undertaken by the mission. We show that, within regions located close to missions, proximity to a Printing Press significantly increases newspaper readership today. We also document a strong association between proximity to a Printing Press and contemporary economic development. Our results are robust to a variety of identification strategies.
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The long Term Effects of the Printing Press in Sub Saharan Africa
2013Co-Authors: Julia Cage, Valeria RuedaAbstract:This article delves into the relationship between newspaper readership and civic attitudes, and its e↵ect on economic development. To this end, we investigate the long-term consequences of the introduction of the Printing Press in the 19th century. In sub-Saharan Africa, Protestant missionaries were the first both to import the Printing Press technology and to allow the indigenous population to use it. We build a new geocoded dataset locating Protestant missions in 1903. This dataset includes, for each mission station, the geographic location and its characteristics, as well as the educational and health-related investments undertaken by the mission. We show that, within regions located close to missions, proximity to a Printing Press significantly increases newspaper readership today. We also document a strong association between proximity to a Printing Press and contemporary economic development. Our results are robust to a variety of identification strategies.
Tsuguaki Yoshida - One of the best experts on this subject based on the ideXlab platform.
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Register control of rotogravure Printing Press. Application of nonlinear control theory to sectional drive Printing Press
Electronics and Communications in Japan, 2011Co-Authors: Tsuguaki Yoshida, Shinichiro Takagi, Yasuhiko Muto, Teilong ShenAbstract:This paper presents a nonlinear register control scheme for the latest type of rotogravure Printing Presses, referred to as the sectional drive system. In Printing Presses where each gravure cylinder is driven by an individual motor, tension fluctuations caused by an upstream register control generate register errors in downstream units. Therefore, development of a control system to reduce downstream register error propagation is a challenging issue for the Printing Presses. First, we propose a nonlinear coordinate transformation for the state variables in order to deal with the Printing Press dynamics easily. Then, based on the new coordinates, a nonlinear control law is designed with the Lyapunov stability theorem such that the register errors converge to zero. Finally. the performance of the proposed method is demonstrated by simulation and experiments carried out on a practical Printing Press, and a comparison with a conventional control method is also presented to show the effectiveness of the proposed control scheme. (C) 2010 Wiley Periodicals, Inc. Electron Comm Jpn, 94(1): 17-24, 2011; Published online in Wiley Online Library (wileyonlinelibrary.com). DOI 10.1002/ecj.10282
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ECC - Nonlinear feedback Printing positioning control for rotogravure Printing Press
2009 European Control Conference (ECC), 2009Co-Authors: Hiroyuki Komatsu, Tsuguaki Yoshida, Shinichiro Takagi, Tielong Shen, Yasuhiko MutoAbstract:In a multi-color Printing Press consisting of multi-Printing units, the dynamics of each unit are coupled and the signal propagation between two neighboring Printing units is always with delay. A challenging issue for control of the Printing Press is how to handle the web pass such that the multi colors are printed with high precision. This paper presents a delay-dependent nonlinear control approach to Printing positioning control in a three-color Printing Press. First, a nonlinear coordinate transformation is introduced to a state space model that describes the dynamics of the tension and the Printing error. Then, based on the new dynamical model, two feedback control schemes are proposed. A state feedback controller is designed such that tension errors and Printing errors converge to zero, and an output feedback controller is proposed to perform the state feedback control law without tension sensors. Furthermore, simulation and experiments are performed to demonstrate the effectiveness of the proposed control scheme.
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Modeling and Resister Control of Sectional Drive Gravure Printing Press
Transactions of the Japan Society of Mechanical Engineers. C, 2008Co-Authors: Tsuguaki Yoshida, Shinichiro Takagi, Yasuhiko Muto, Tielong ShenAbstract:In this paper, a method of modeling and control of a Printing Press is considered. In the recent standard gravure Printing Press called “sectional drive” with multi-units, register control causes register errors in the downstream units. The problem is not only the increase of the number of defections but also the complexity of adjusting procedure of controller parameters. Because of this, it is needed to introduce a new control system to shorten the total settling time. For this purpose, in this paper, a mathematical model of the sectional drive gravure Printing Press is proposed, and then, a cooperative control method using feedforward is designed in consideration of the relation between units. It turned out that this control system makes the total settling time short, and furthermore, using the mathematical model, the simulation based design method is established, which also shorten the time period of control system design procedure. The paper also presents some experimental results to show the validity of proposed mathematical model and control system.
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Register Control of Rotogravure Printing Press
IEEJ Transactions on Industry Applications, 2008Co-Authors: Tsuguaki Yoshida, Shinichiro Takagi, Yasuhiko Muto, Teilong ShenAbstract:This paper presents a nonlinear register control scheme for the latest type of rotogravure Printing Presses referred to as the sectional drive system. In the Printing Presses, where each gravure cylinder is driven by an individual motor, tension fluctuations caused by an upstream register control generate register errors in downstream units. Therefore, development of the control system to reduce the register error propagation to the downstream is a challenging issue in the Printing Press. First, we propose a nonlinear coordinate transformation for the state variables in order to deal with the Printing Press dynamics easily. Then, based on the new coordinates, a nonlinear control law is designed with the Lyapunov stability theorem such that the register errors converge to zero. Finally, the performance of the proposed method is demonstrated by simulation and experiment carried out on a practical Printing Press, and a comparison with a conventional control method is also presented to show the effectiveness of the proposed control scheme.
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Register Control of Sectional Drive Rotogravure Printing Press
Manufacturing Systems and Technologies for the New Frontier, 1Co-Authors: Tsuguaki Yoshida, Shinichiro Takagi, Yasuhiko Muto, Teilong ShenAbstract:In the latest type of rotogravure Printing Presses referred to as the sectional drive system, wherein each gravure cylinder is driven by an individual motor, tension fluctuations by an upstream register control generate register errors in downstream units. Hence, the introduction of new effective control system to prevent the generation of the downstream register errors is required. For this purpose, in this paper, a method of register control for Printing Presses has been proposed. First, a nonlinear coordinate transformation for the state variable of the Printing Press dynamics is proposed. Subsequently, based on the new coordinate system, a nonlinear control method is designed using the Lyapunov stability. Finally, the performance of the new control method is demonstrated by simulation and experimental results and comparing with a conventional PD control method.
Guo Jun-zhong - One of the best experts on this subject based on the ideXlab platform.
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Study on System Architecture & Its Realization Scheme of Distributed Collaborative Virtual Prototyping for Printing Press
Computer Simulation, 2006Co-Authors: Guo Jun-zhongAbstract:A design procedure of Printing Press complex product was proposed. Then a system architecture of distributed collaborative virtual prototyping for Printing Press was discussed. Its function mould was given in detail. After that, the roadmap of implementing the above platform was proposed, and its key technology was discussed. At last, some problems to be solved were explained.
