THE TECHNOLOGICAL EVOLUTION of the IC fabri-cation process, consisting of device shrinking, power... more THE TECHNOLOGICAL EVOLUTION of the IC fabri-cation process, consisting of device shrinking, power sup-ply reduction, and increasing operating speeds, has significantly reduced the manufacturing yield and relia-bility of very deep-submicron (VDSM) ICs when various ...
Has the persistence of inflation in the United States changed since 1965? We estimate the persist... more Has the persistence of inflation in the United States changed since 1965? We estimate the persistence of inflation over time using different measures and estimation procedures and we produce confidence intervals for our estimates as well as formal tests of unchanged persistence. We find that inflation persistence has been high and approximately unchanged in the U.S. over our sample period. We reconcile our results with other studies that reached different conclusions. r (R. Reis).
We introduced the concept of the image-rejection sub-sampling ADC, which is a combination of a hi... more We introduced the concept of the image-rejection sub-sampling ADC, which is a combination of a highly oversampled ADC associated with a sub-sampling block implementing a double-quadrature mixer. This allows to implement wide-band conversion for radio receivers with associated advantages. On the one hand, software tuning and selectivity becomes possible, simplifying implementation of multi-mode capability. On the other hand, the specifications of the IF filters and of the RF frequency synthesiser can be relaxed, the former due to the large dynamic range of the ADC that accepts a high level of blocking signals, the latter due to the software tuning that allows coarse frequency resolution in the RF frequency synthesiser. An analysis was presented that shows that these advantages should be possible with no penalty on power dissipation, and simulation results demonstrate the efficacy of the principle.
This paper discusses high level techniques for designing fault tolerant systems in SRAM-based FPG... more This paper discusses high level techniques for designing fault tolerant systems in SRAM-based FPGAs, without modification in the FPGA architecture. Triple Modular Redundancy (TMR) has been successfully applied in FPGAs to mitigate transient faults, which are likely to occur in space applications. However, TMR comes with high area and power dissipation penalties. The new technique proposed in this paper was specifically developed for FPGAs to cope with transient faults in the user combinational and sequential logic, while also reducing pin count, area and power dissipation. The methodology was validated by fault injection experiments in an emulation board. We present some fault coverage results and a comparison with the TMR approach.
A novel standard cell design methodology is presented that is based on the implementation of inte... more A novel standard cell design methodology is presented that is based on the implementation of interconnections over the gates to avoid dedicated connection channels. A priority scheme is used for the allocation of the metal layer. The result is a very compact layout. A standard cell library was designed using a double-metal CMOS technology. The topological structure and cell library
This paper develops and analyzes a general-equilibrium model with sticky information. The only ri... more This paper develops and analyzes a general-equilibrium model with sticky information. The only rigidity in goods, labor, and financial markets is that agents are inattentive, sporadically updating their information sets, when setting prices, wages, and consumption. After presenting the ingredients of such a model, the paper develops an algorithm to solve this class of models and uses it to study the model's dynamic properties. It then estimates the parameters of the model using U.S. data on five key macroeconomic time series. It finds that information stickiness is present in all markets, and is especially pronounced for consumers and workers. Variance decompositions show that monetary policy and aggregate demand shocks account for most of the variance of inflation, output, and hours.
This paper assumes that a central bank commits itself to maintaining an inflation target and then... more This paper assumes that a central bank commits itself to maintaining an inflation target and then asks what measure of the inflation rate the central bank should use if it wants to maximize economic stability. The paper first formalizes this problem and examines its microeconomic foundations. It then shows how the weight of a sector in the stability price index depends on the sector's characteristics, including size, cyclical sensitivity, sluggishness of price adjustment, and magnitude of sectoral shocks. When a numerical illustration of the problem is calibrated to U.S. data, one tentative conclusion is that a central bank that wants to achieve maximum stability of economic activity should use a price index that gives substantial weight to the level of nominal wages.
We studied the seroprevalence of antibodies against Trypanosoma cruzi in the human population alo... more We studied the seroprevalence of antibodies against Trypanosoma cruzi in the human population along with domiciliary infestation by triatomine bugs in an area endemic for Chagas disease in the Chaco Province of Argentina. In addition, we carried out parasitologic surveys in patients, dogs, wild mammals, and vectors. The mean seroprevalence in humans was 27.81% (109 of 392) and 24.14% (63 of 261) in 1-15-year-old children. The minimum domiciliary infestation rate was 13.33%, with certain areas reaching 53.85%. The prevalence was 15.09% (16 of 106) in dogs and 35.71% (10 of 28) in opossums. Infection with T. cruzi was detected in 30.10% (59 of 196) of the Triatoma infestans tested. Compared with nationwide studies, our data suggest that 1) there are zones requiring immediate sanitary action, and 2) nationwide estimates are based on very heterogeneous epidemiologic situations. This heterogeneity emphasizes the importance of in-depth studies of restricted areas to provide additional information for a better understanding of the present status of Chagas disease in Argentina.
THE TECHNOLOGICAL EVOLUTION of the IC fabri-cation process, consisting of device shrinking, power... more THE TECHNOLOGICAL EVOLUTION of the IC fabri-cation process, consisting of device shrinking, power sup-ply reduction, and increasing operating speeds, has significantly reduced the manufacturing yield and relia-bility of very deep-submicron (VDSM) ICs when various ...
Has the persistence of inflation in the United States changed since 1965? We estimate the persist... more Has the persistence of inflation in the United States changed since 1965? We estimate the persistence of inflation over time using different measures and estimation procedures and we produce confidence intervals for our estimates as well as formal tests of unchanged persistence. We find that inflation persistence has been high and approximately unchanged in the U.S. over our sample period. We reconcile our results with other studies that reached different conclusions. r (R. Reis).
We introduced the concept of the image-rejection sub-sampling ADC, which is a combination of a hi... more We introduced the concept of the image-rejection sub-sampling ADC, which is a combination of a highly oversampled ADC associated with a sub-sampling block implementing a double-quadrature mixer. This allows to implement wide-band conversion for radio receivers with associated advantages. On the one hand, software tuning and selectivity becomes possible, simplifying implementation of multi-mode capability. On the other hand, the specifications of the IF filters and of the RF frequency synthesiser can be relaxed, the former due to the large dynamic range of the ADC that accepts a high level of blocking signals, the latter due to the software tuning that allows coarse frequency resolution in the RF frequency synthesiser. An analysis was presented that shows that these advantages should be possible with no penalty on power dissipation, and simulation results demonstrate the efficacy of the principle.
This paper discusses high level techniques for designing fault tolerant systems in SRAM-based FPG... more This paper discusses high level techniques for designing fault tolerant systems in SRAM-based FPGAs, without modification in the FPGA architecture. Triple Modular Redundancy (TMR) has been successfully applied in FPGAs to mitigate transient faults, which are likely to occur in space applications. However, TMR comes with high area and power dissipation penalties. The new technique proposed in this paper was specifically developed for FPGAs to cope with transient faults in the user combinational and sequential logic, while also reducing pin count, area and power dissipation. The methodology was validated by fault injection experiments in an emulation board. We present some fault coverage results and a comparison with the TMR approach.
A novel standard cell design methodology is presented that is based on the implementation of inte... more A novel standard cell design methodology is presented that is based on the implementation of interconnections over the gates to avoid dedicated connection channels. A priority scheme is used for the allocation of the metal layer. The result is a very compact layout. A standard cell library was designed using a double-metal CMOS technology. The topological structure and cell library
This paper develops and analyzes a general-equilibrium model with sticky information. The only ri... more This paper develops and analyzes a general-equilibrium model with sticky information. The only rigidity in goods, labor, and financial markets is that agents are inattentive, sporadically updating their information sets, when setting prices, wages, and consumption. After presenting the ingredients of such a model, the paper develops an algorithm to solve this class of models and uses it to study the model's dynamic properties. It then estimates the parameters of the model using U.S. data on five key macroeconomic time series. It finds that information stickiness is present in all markets, and is especially pronounced for consumers and workers. Variance decompositions show that monetary policy and aggregate demand shocks account for most of the variance of inflation, output, and hours.
This paper assumes that a central bank commits itself to maintaining an inflation target and then... more This paper assumes that a central bank commits itself to maintaining an inflation target and then asks what measure of the inflation rate the central bank should use if it wants to maximize economic stability. The paper first formalizes this problem and examines its microeconomic foundations. It then shows how the weight of a sector in the stability price index depends on the sector's characteristics, including size, cyclical sensitivity, sluggishness of price adjustment, and magnitude of sectoral shocks. When a numerical illustration of the problem is calibrated to U.S. data, one tentative conclusion is that a central bank that wants to achieve maximum stability of economic activity should use a price index that gives substantial weight to the level of nominal wages.
We studied the seroprevalence of antibodies against Trypanosoma cruzi in the human population alo... more We studied the seroprevalence of antibodies against Trypanosoma cruzi in the human population along with domiciliary infestation by triatomine bugs in an area endemic for Chagas disease in the Chaco Province of Argentina. In addition, we carried out parasitologic surveys in patients, dogs, wild mammals, and vectors. The mean seroprevalence in humans was 27.81% (109 of 392) and 24.14% (63 of 261) in 1-15-year-old children. The minimum domiciliary infestation rate was 13.33%, with certain areas reaching 53.85%. The prevalence was 15.09% (16 of 106) in dogs and 35.71% (10 of 28) in opossums. Infection with T. cruzi was detected in 30.10% (59 of 196) of the Triatoma infestans tested. Compared with nationwide studies, our data suggest that 1) there are zones requiring immediate sanitary action, and 2) nationwide estimates are based on very heterogeneous epidemiologic situations. This heterogeneity emphasizes the importance of in-depth studies of restricted areas to provide additional information for a better understanding of the present status of Chagas disease in Argentina.
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