Browsing
     by title


0-9 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

or enter first few letters:   
OK
Full Text
Peer Reviewed
See detailTracing the ‘Jewish Freedom Fighter’. The legacy of Naftali Botwin and the construction of a transnational cult of Jewish heroes
Zaagsma, Gerben UL

in Balázs, Eszter; Royer, Clara (Eds.) Le Culte des héros en Europe centrale 1880-1945 (2019)

This article discusses the transnational heroic cult that developed in Yiddish communist circles around the figure of Naftali Botwin, a young Polish-Jewish communist who was executed by Polish authorities ... [more ▼]

This article discusses the transnational heroic cult that developed in Yiddish communist circles around the figure of Naftali Botwin, a young Polish-Jewish communist who was executed by Polish authorities in the city of Lwów, following a trial in which he was convicted for assassinating a police infiltrator in the ranks of the Polish Communist Party (KPP). The discussion highlights how Botwin’s legacy was appropriated in multiple, and sometimes contrasting, ways in the decades following his death, especially within the context of the creation of the Botwin Company in the International Brigades during the Spanish Civil War. In doing so it will also highlight the transnational nature of this cult, as his memory lived on through poems, plays and publications that circulated through the worldwide networks and communicative spaces of Jewish (leftist) émigrés. [less ▲]

Detailed reference viewed: 399 (37 UL)
Full Text
Peer Reviewed
See detailTracing where and who provenance in Linked Data: A calculus
Dezani-Ciancaglini, Mariangiola; Horne, Ross James UL; Sassone, Vladimiro

in Theoretical Computer Science (2012), 464

Detailed reference viewed: 82 (1 UL)
Peer Reviewed
See detailTracking Changes in the Intensity of Financial Sector?
Jin, Xisong UL

Scientific Conference (2015)

Detailed reference viewed: 39 (0 UL)
Full Text
Peer Reviewed
See detailTracking complex mixtures of chemicals in our changing environment
Escher, Beate I.; Stapleton, Heather M.; Schymanski, Emma UL

in Science (2020), 367(6476), 388--392

Chemicals have improved our quality of life, but the resulting environmental pollution has the potential to cause detrimental effects on humans and the environment. People and biota are chronically ... [more ▼]

Chemicals have improved our quality of life, but the resulting environmental pollution has the potential to cause detrimental effects on humans and the environment. People and biota are chronically exposed to thousands of chemicals from various environmental sources through multiple pathways. Environmental chemists and toxicologists have moved beyond detecting and quantifying single chemicals to characterizing complex mixtures of chemicals in indoor and outdoor environments and biological matrices. We highlight analytical and bioanalytical approaches to isolating, characterizing, and tracking groups of chemicals of concern in complex matrices. Techniques that combine chemical analysis and bioassays have the potential to facilitate the identification of mixtures of chemicals that pose a combined risk. [less ▲]

Detailed reference viewed: 206 (2 UL)
Full Text
Peer Reviewed
See detailA tracking error control approach for model predictive position control of a quadrotor with time varying reference
Dentler, Jan Eric UL; Kannan, Somasundar UL; Olivares Mendez, Miguel Angel UL et al

in IEEE International Conference on Robotics and Biomimetics ROBIO, Qingdao, China, 2016 (2016, December 06)

In mobile robotic applications, a common problem is the following of a given trajectory with a constant velocity. Using standard model predictive control (MPC) for tracking of time varying trajectories ... [more ▼]

In mobile robotic applications, a common problem is the following of a given trajectory with a constant velocity. Using standard model predictive control (MPC) for tracking of time varying trajectories leads to a constant tracking error. This problem is modelled in this paper as quadrotor position tracking problem. The presented solution is a computationally light-weight target position control (T PC), that controls the tracking error of MPCs for constantly moving targets. The proposed technique is assessed mathematically in the Laplace domain, in simulation, as well as experimentally on a real quadrotor system. [less ▲]

Detailed reference viewed: 236 (29 UL)
Full Text
See detailTracking hurricanes Harvey and Irma using GPS tropospheric products
Ejigu, Yohannes Getachew; Teferle, Felix Norman UL; Hunegnaw, Addisu UL et al

Poster (2019, December 10)

The 2017 Hurricanes season was one of the most powerful severe weather events producing catastrophic socio-economic and environmental effects on the east coast of the United States. Therefore, tracking ... [more ▼]

The 2017 Hurricanes season was one of the most powerful severe weather events producing catastrophic socio-economic and environmental effects on the east coast of the United States. Therefore, tracking their path accurately is extremely useful. Today Global Navigation Satellite Systems (GNSS) tropospheric products, such as Zenith Wet Delays (ZWD), and Integrated Water Vapor (IWV) are used as complementary data sets in Numerical Weather Prediction (NWP) models. In this study, we employed GPS-derived IWV and horizontal tropospheric gradient information to monitor and investigate the complicated characteristics of hurricane events in their spatial and temporal distribution using a dense ground network of GPS stations. Our results show that a surge in GPS-derived IWV occurred several hours prior to the manifestation of the major hurricanes Harvey and Irma. We used the derived GPS-derived IWV information as input to spaghetti lines weather models, allowing us to predict the paths of Harvey and Irma hurricanes. As such, a parameter directly estimated from GPS can provide an additional resource for improving the monitoring of hurricane paths [less ▲]

Detailed reference viewed: 51 (0 UL)
Full Text
Peer Reviewed
See detailTracking Hurricanes using GPS atmospheric precipitable water vapor field
Ejigu, Yohannes Getachew; Teferle, Felix Norman UL; klos, Anna et al

in Beyond 100: The Next Century in Geodesy (2020)

Tropical cyclones are one of the most powerful severe weather events that produce devastating socioeconomic and environmental impacts in the areas they strike. Therefore, monitoring and tracking of the ... [more ▼]

Tropical cyclones are one of the most powerful severe weather events that produce devastating socioeconomic and environmental impacts in the areas they strike. Therefore, monitoring and tracking of the arrival times and path of the tropical cyclones are extremely valuable in providing early warning to the public and governments. Hurricane Florence struck the East cost of USA in 2018 and offers an outstanding case study. We employed Global Positioning System (GPS) derived precipitable water vapor (PWV) data to track and investigate the characteristics of storm occurrences in their spatial and temporal distribution using a dense ground network of permanent GPS stations. Our findings indicate that a rise in GPS-derived PWV occurred several hours before Florence’s manifestation. Also, we compared the temporal distribution of the GPS-derived PWV content with the precipitation value for days when the storm appeared in the area under influence. The study will contribute to quantitative assessment of the complementary GPS tropospheric products in hurricane monitoring and tracking using GPS-derived water vapor evolution from a dense network of permanent GPS stations [less ▲]

Detailed reference viewed: 120 (9 UL)
Full Text
Peer Reviewed
See detailTracking neighboring quasi-satellite orbits around Phobos
Muralidharan, Vivek UL; Weiss, Avishai; Kalabic, Uros

in IFAC-PapersOnLine (2020, July)

We consider the orbital maintenance problem on a quasi-satellite orbit about the Martian moon, Phobos. The orbit is computed using a high-fidelity ephemeris model so that the major sources of disturbances ... [more ▼]

We consider the orbital maintenance problem on a quasi-satellite orbit about the Martian moon, Phobos. The orbit is computed using a high-fidelity ephemeris model so that the major sources of disturbances are due to measurement error. Two types of orbit maintenance schemes are considered. The first is based on asymptotically tracking the desired trajectory and the second is based on stabilizing to the manifold of trajectories that share the same Jacobi constant as the reference trajectory. The latter can be done because trajectories with the same Jacobi constant are in the neighborhood of one another. The results show that the trajectory-tracking scheme has lower fuel consumption when tracking must be precise and that the approach of stabilizing to a manifold has better fuel consumption at the expense of tracking. [less ▲]

Detailed reference viewed: 25 (0 UL)
Full Text
Peer Reviewed
See detailTractor_DB (version 2.0): a database of regulatory interactions in gamma-proteobacterial genomes.
Perez, Abel Gonzalez; Espinosa Angarica, Vladimir UL; Vasconcelos, Ana Tereza R. et al

in Nucleic acids research (2007), 35(Database issue), 132-6

The version 2.0 of Tractor_DB is now accessible at its three international mirrors: www.bioinfo.cu/Tractor_DB, www.tractor.lncc.br and http://www.ccg.unam.mx/tractorDB. This database contains a collection ... [more ▼]

The version 2.0 of Tractor_DB is now accessible at its three international mirrors: www.bioinfo.cu/Tractor_DB, www.tractor.lncc.br and http://www.ccg.unam.mx/tractorDB. This database contains a collection of computationally predicted Transcription Factors' binding sites in gamma-proteobacterial genomes. These data should aid researchers in the design of microarray experiments and the interpretation of their results. They should also facilitate studies of Comparative Genomics of the regulatory networks of this group of organisms. In this paper we describe the main improvements incorporated to the database in the past year and a half which include incorporating information on the regulatory networks of 13-increasing to 30-new gamma-proteobacteria and developing a new computational strategy to complement the putative sites identified by the original weight matrix-based approach. We have also added dynamically generated navigation tabs to the navigation interfaces. Moreover, we developed a new interface that allows users to directly retrieve information on the conservation of regulatory interactions in the 30 genomes included in the database by navigating a map that represents a core of the known Escherichia coli regulatory network. [less ▲]

Detailed reference viewed: 130 (0 UL)
Full Text
Peer Reviewed
See detailTRACTOR_DB: a database of regulatory networks in gamma-proteobacterial genomes.
Gonzalez, Abel D.; Espinosa Angarica, Vladimir UL; Vasconcelos, Ana T. et al

in Nucleic acids research (2005), 33(Database issue), 98-102

Experimental data on the Escherichia coli transcriptional regulatory system has been used in the past years to predict new regulatory elements (promoters, transcription factors (TFs), TFs' binding sites ... [more ▼]

Experimental data on the Escherichia coli transcriptional regulatory system has been used in the past years to predict new regulatory elements (promoters, transcription factors (TFs), TFs' binding sites and operons) within its genome. As more genomes of gamma-proteobacteria are being sequenced, the prediction of these elements in a growing number of organisms has become more feasible, as a step towards the study of how different bacteria respond to environmental changes at the level of transcriptional regulation. In this work, we present TRACTOR_DB (TRAnscription FaCTORs' predicted binding sites in prokaryotic genomes), a relational database that contains computational predictions of new members of 74 regulons in 17 gamma-proteobacterial genomes. For these predictions we used a comparative genomics approach regarding which several proof-of-principle articles for large regulons have been published. TRACTOR_DB may be currently accessed at http://www.bioinfo.cu/Tractor_DB, http://www.tractor.lncc.br/ or at http://www.cifn.unam.mx/Computational_Genomics/tractorDB. Contact Email id is tractor@cifn.unam.mx. [less ▲]

Detailed reference viewed: 152 (0 UL)
Full Text
See detailTrade and Vertical Differentiation
Picard, Pierre M UL; Tampieri, Alessandro

E-print/Working paper (2019)

This paper discusses a trade model with many countries, many goods produced in multiple quality versions, and non-homothetic preferences. It embeds in the same model a series of results that have been ... [more ▼]

This paper discusses a trade model with many countries, many goods produced in multiple quality versions, and non-homothetic preferences. It embeds in the same model a series of results that have been empirically confirmed: high-income countries specialize in the production of high-quality goods and trade more of those. Richer countries purchase more high-quality varieties. They import more high-quality products from the most productive exporters. The paper then studies the impact of productivity and population changes on the quality composition of exports. It finally explains why countries import higher quality goods from more distant countries. [less ▲]

Detailed reference viewed: 85 (3 UL)
Full Text
Peer Reviewed
See detailTrade costs, FDI incentives and the intensity of price competition
Lambertini, Luca; Tampieri, Alessandro UL; Gori, Giuseppe Francesco

in International Journal of Economic Theory (2014)

Detailed reference viewed: 72 (0 UL)
Full Text
Peer Reviewed
See detailTrade Credit and firm Comovements
Pisa, Magdalena UL; Bos, Jaap; Bams, Dennis

E-print/Working paper (2015)

This paper provides evidence that production linkages, as well as credit chains (represented by trade credit), are important for the transmission of idiosyncratic (firm-level) shocks across firms in the ... [more ▼]

This paper provides evidence that production linkages, as well as credit chains (represented by trade credit), are important for the transmission of idiosyncratic (firm-level) shocks across firms in the economy. We build on the idea that trade credit develops along production linkages, and amplifies the idiosyncratic shock as firms may lack inputs and also liquidity. Using disaggregated firm-level data we show that the disturbance of customer's sales increases with greater trade credit linkage. We show that during a recession the existence of trade credit linkage propagates shocks upstream, from a supplier onto its upstream customer. In these periods, firms are short of liquidity and are unable to withstand a drop in trade credit provision. In good times, however, trade credit plays a stabilizing role, reducing the volatility of firms' sales. In these periods, firms with sufficient liquidity are able to transfer some of it to liquidity-starved production partners in order to guarantee their own stable production. [less ▲]

Detailed reference viewed: 49 (2 UL)
Full Text
See detailTrade integration and trade imbalances in the European Union: a network perspective
Carpantier, Jean-Francois UL; Delvenne, Jean-Charles; Krings, Gautier

E-print/Working paper (2013)

We study the ever more integrated and ever more unbalanced trade relationships between European countries. To better capture the complexity of economic networks, we propose two global measures that assess ... [more ▼]

We study the ever more integrated and ever more unbalanced trade relationships between European countries. To better capture the complexity of economic networks, we propose two global measures that assess the trade integration and the trade imbalances of the European countries. These measures are the network (or indirect) counterparts to traditional (or direct) measures such as the trade-to-GDP (Gross Domestic Product) and trade deficit-to-GDP ratios. Our indirect tools account for the European inter-country trade structure and follow (i) a decomposition of the global trade flow into elementary flows that highlight the long-range dependencies between exporting and importing economies and (ii) the commute-time distance for trade integration,which measures the impact of a perturbation in the economy of a country on another country, possibly through intermediate partners by domino effect. Our application addresses the impact of the launch of the Euro. We find that the indirect imbalance measures better identify the countries ultimately bearing deficits and surpluses, by neutralizing the impact of trade transit countries, such as the Netherlands. Among others, we find that ultimate surpluses of Germany are quite concentrated in only three partners. We also show that for some countries, the direct and indirect measures of trade integration diverge, thereby revealing that these countries (e.g. Greece and Portugal) trade to a smaller extent with countries considered as central in the European Union network. [less ▲]

Detailed reference viewed: 102 (2 UL)
Full Text
Peer Reviewed
See detailTrade integration and trade imbalances in the European Union: a network perspective
Carpantier, Jean-Francois UL; Delvenne, Jean-Charles; Kriegs, Gautier

in PLoS ONE (2014), 9(1), 83448

We study the ever more integrated and ever more unbalanced trade relationships between European countries. To better capture the complexity of economic networks, we propose two global measures that assess ... [more ▼]

We study the ever more integrated and ever more unbalanced trade relationships between European countries. To better capture the complexity of economic networks, we propose two global measures that assess the trade integration and the trade imbalances of the European countries. These measures are the network (or indirect) counterparts to traditional (or direct) measures such as the trade-to-GDP (Gross Domestic Product) and trade deficit-to-GDP ratios. Our indirect tools account for the European inter-country trade structure and follow (i) a decomposition of the global trade flow into elementary flows that highlight the long-range dependencies between exporting and importing economies and (ii) the commute-time distance for trade integration,which measures the impact of a perturbation in the economy of a country on another country, possibly through intermediate partners by domino effect. Our application addresses the impact of the launch of the Euro. We find that the indirect imbalance measures better identify the countries ultimately bearing deficits and surpluses, by neutralizing the impact of trade transit countries, such as the Netherlands. Among others, we find that ultimate surpluses of Germany are quite concentrated in only three partners. We also show that for some countries, the direct and indirect measures of trade integration diverge, thereby revealing that these countries (e.g. Greece and Portugal) trade to a smaller extent with countries considered as central in the European Union network. [less ▲]

Detailed reference viewed: 93 (0 UL)
Full Text
Peer Reviewed
See detailTrade Protection and Market Power: Evidence from US antidumping and countervailing duties
Rovegno Malharin, Laura UL

in Review of World Economics (2013), 149(3), 443-476

Contingent protection measures were originally intended to protect domestic producers from what were considered to be “unfairly” cheap imports. However, due to the way in which these policies are designed ... [more ▼]

Contingent protection measures were originally intended to protect domestic producers from what were considered to be “unfairly” cheap imports. However, due to the way in which these policies are designed and implemented, they have been heavily criticised for their greatly disruptive effects on markets, and particularly on competition. The analysis presented in this paper contributes to the debate by studying the impact of US Antidumping (AD) and Countervailing (CV) duties on domestic producers’ price-cost margins (PCM). To this end, the study takes advantage of a long panel of 4-digit industries in the US covering 26 years of AD/CV activity, including the periods before and after the changes to AD/CV laws introduced following the Uruguay Round (UR). It finds evidence of a positive effect of AD/CV duties on PCM for the period prior to the UR, but the effect seems to disappear in the years following the UR. The analysis accounts for potential endogeneity in AD/CV duties, as well as the intensity of the protection granted. [less ▲]

Detailed reference viewed: 221 (123 UL)
Full Text
See detailTrade Union Objectives and Economic Growth
Irmen, Andreas UL; Wigger, Berthold

Report (2001)

A trade union whose purpose is to raise wages above the competitive level may foster economic growth if it succeeds in shifting income away from the owners of capital to the workers and if the workers ... [more ▼]

A trade union whose purpose is to raise wages above the competitive level may foster economic growth if it succeeds in shifting income away from the owners of capital to the workers and if the workers' marginal propensity to save exceeds the one of capitalists. We make this point in an overlapping generations framework with unionized labor. Considering a monopoly union which cares for wages and employment, we determine a range of trade union objectives and characterize the aggregate technology so that the union's policy spurs per capita income growth and increases welfare of all generations that adhere to the union. [less ▲]

Detailed reference viewed: 89 (1 UL)
Full Text
Peer Reviewed
See detailTrade Union Objectives and Economic Growth
Irmen, Andreas UL; Wigger, Berthold U.

in FinanzArchiv: Public Finance Analysis (2002), 59(1), 49-

A trade union whose purpose is to raise wages above the competitive level may foster economic growth if it succeeds in shifting income away from the owners of capital to the workers and if the workers ... [more ▼]

A trade union whose purpose is to raise wages above the competitive level may foster economic growth if it succeeds in shifting income away from the owners of capital to the workers and if the workers' marginal propensity to save exceeds the one of capitalists. We make this point in an overlapping generations framework with unionized labor. Considering a monopoly union which cares for wages and employment, we determine a range of trade union objectives and characterize the aggregate technology so that the union's policy spurs per capita income growth. However, the union's policy cannot lead to a Pareto-improvement. [less ▲]

Detailed reference viewed: 111 (0 UL)
Full Text
Peer Reviewed
See detailTrade, Economic Geography and the Choice of Product Quality
Picard, Pierre M. UL

E-print/Working paper (2012)

The present paper studies the effect of the choice of product quality on trade and location of firms. We build a quality-augmented model where consumers have preferences for the quality of a set of ... [more ▼]

The present paper studies the effect of the choice of product quality on trade and location of firms. We build a quality-augmented model where consumers have preferences for the quality of a set of differentiated varieties. Firms do not only develop and sell manufacturing varieties in a monopolistic competitive market but also determine the quality level of their varieties by investing in research and de- velopment. We explore the price and quality equilibrium properties when firms are immobile. We then consider a footloose capital model where capital is allocated to the manufacturing firms in the region offering the highest return. We show that the larger region produces varieties of higher quality and that the quality gap increases with larger asymmetries in region sizes and with larger trade costs. Finally, the home market effect is mitigated when firms choose their product quality. [less ▲]

Detailed reference viewed: 91 (4 UL)
See detailTrade, economic geography and the choice of product quality
Picard, Pierre M. UL

Presentation (2013, October)

Detailed reference viewed: 95 (6 UL)