juan torres - Academia.edu (original) (raw)

Papers by juan torres

Physical Review Letters, 2002

We put forward schemes to prepare photons in multi-dimensional vector states of orbital angular m... more We put forward schemes to prepare photons in multi-dimensional vector states of orbital angular momentum. We show realizable light distributions that yield prescribed states with finite or infinite normal modes. In particular, we show that suitable light vortex-pancakes allow the add-drop of specific vector projections. We suggest that such photons might allow the generation of engineered quNits in multi-dimensional quantum information systems.

The prevalence of lipid abnormalities revealed in a survey done in 417 Mexican cities is describe... more The prevalence of lipid abnormalities revealed in a survey done in 417 Mexican cities is described. Information was obtained on 15,607 subjects, aged 20 to 69 years. In this report, only samples obtained after a 9-to 12-h fast were included (2,256 cases: 953 men and 1,303 women). The population is representative of Mexican urban adults. Mean lipid concentrations were: cholesterol, 4.80 mmol/l; triglycerides, 2.39 mmol/l; HDL cholesterol, 1.00 mmol/l; and LDL cholesterol, 3.06 mmol/l. The most prevalent abnormality was HDL cholesterol below 0.9 mmol/l (46.2% for men and 28.7% for women). Hypertriglyceridemia ( Ͼ 2.26 mmol/l) was the second most prevalent abnormality (24.3%). Severe hypertriglyceridemia ( Ͼ 11.2 mmol/l) was observed in 0.42% of the population. Increased LDL cholesterol ( у 4.21 mmol/l) was observed in 11.2% of the sample. Half of the hypertriglyceridemic subjects had a mixed dyslipidemia or low HDL cholesterol. More than 50% of the low HDL cholesterol cases were not related to hypertriglyceridemia. Insulin resistance was found in 59% of them.

La creciente preocupación social por las manifestaciones de violencia familiar está llevando a lo... more La creciente preocupación social por las manifestaciones de violencia familiar está llevando a los medios de comunicación a o c u p a rse de las agresiones domésticas con cierta frecuencia. Esta situación, sin duda deseabl e, encierra también algunos peligros. De h e cho, es frecuente la difusión de afi rmaciones que, a pesar de carecer de suficiente ap oyo empírico, tienen consecuencias negat iva s i m p o rtantes en la vida de nu m e rosas personas (v i d. Kaufman y Zig l e r, 1993). Se ha llegado a defe n d e r, por ejemplo, que el alcohol y las drogas son la principal causa de la violencia; que el maltrat o o c u rre fundamentalmente en familias con escasos re c u rsos económicos y culturales; o que los hijos que crecen en ambientes fa m il i a res violentos se conv i e rten, a su vez, en padres y/o cóny u ge s agre s ivos (Gelles y Corn e r, 1990). De todas estas afi rmaciones, es esta última la que mayor interés teórico ha suscitado, y la que va a c e n t rar nu e s t ra atención en este artículo. En concreto, nos ocuparemos de la posible repetición de la violencia de pare j a .

Optics Express, 2005

A major application of optics is imaging all types of structural, physical, chemical and biologic... more A major application of optics is imaging all types of structural, physical, chemical and biological features of matter. Techniques based on most known properties of light have been developed over the years to remotely acquire information about such features. They include the spin angular momentum, encoded in the polarization, but not yet the orbital angular momentum encoded in its spiral spectrum. Here we put forward the potential of such spiral spectra. In particular, we use several canonical examples to show how the orbital angular momentum spectra of a light beam can be used to image a variety of intrinsic and extrinsic properties encoded, e.g., in phase and amplitude gradients, dislocations or delays.

Physical Review Letters, 2002

We put forward schemes to prepare photons in multi-dimensional vector states of orbital angular m... more We put forward schemes to prepare photons in multi-dimensional vector states of orbital angular momentum. We show realizable light distributions that yield prescribed states with finite or infinite normal modes. In particular, we show that suitable light vortex-pancakes allow the add-drop of specific vector projections. We suggest that such photons might allow the generation of engineered quNits in multi-dimensional quantum information systems.

The prevalence of lipid abnormalities revealed in a survey done in 417 Mexican cities is describe... more The prevalence of lipid abnormalities revealed in a survey done in 417 Mexican cities is described. Information was obtained on 15,607 subjects, aged 20 to 69 years. In this report, only samples obtained after a 9-to 12-h fast were included (2,256 cases: 953 men and 1,303 women). The population is representative of Mexican urban adults. Mean lipid concentrations were: cholesterol, 4.80 mmol/l; triglycerides, 2.39 mmol/l; HDL cholesterol, 1.00 mmol/l; and LDL cholesterol, 3.06 mmol/l. The most prevalent abnormality was HDL cholesterol below 0.9 mmol/l (46.2% for men and 28.7% for women). Hypertriglyceridemia ( Ͼ 2.26 mmol/l) was the second most prevalent abnormality (24.3%). Severe hypertriglyceridemia ( Ͼ 11.2 mmol/l) was observed in 0.42% of the population. Increased LDL cholesterol ( у 4.21 mmol/l) was observed in 11.2% of the sample. Half of the hypertriglyceridemic subjects had a mixed dyslipidemia or low HDL cholesterol. More than 50% of the low HDL cholesterol cases were not related to hypertriglyceridemia. Insulin resistance was found in 59% of them.

La creciente preocupación social por las manifestaciones de violencia familiar está llevando a lo... more La creciente preocupación social por las manifestaciones de violencia familiar está llevando a los medios de comunicación a o c u p a rse de las agresiones domésticas con cierta frecuencia. Esta situación, sin duda deseabl e, encierra también algunos peligros. De h e cho, es frecuente la difusión de afi rmaciones que, a pesar de carecer de suficiente ap oyo empírico, tienen consecuencias negat iva s i m p o rtantes en la vida de nu m e rosas personas (v i d. Kaufman y Zig l e r, 1993). Se ha llegado a defe n d e r, por ejemplo, que el alcohol y las drogas son la principal causa de la violencia; que el maltrat o o c u rre fundamentalmente en familias con escasos re c u rsos económicos y culturales; o que los hijos que crecen en ambientes fa m il i a res violentos se conv i e rten, a su vez, en padres y/o cóny u ge s agre s ivos (Gelles y Corn e r, 1990). De todas estas afi rmaciones, es esta última la que mayor interés teórico ha suscitado, y la que va a c e n t rar nu e s t ra atención en este artículo. En concreto, nos ocuparemos de la posible repetición de la violencia de pare j a .

Optics Express, 2005

A major application of optics is imaging all types of structural, physical, chemical and biologic... more A major application of optics is imaging all types of structural, physical, chemical and biological features of matter. Techniques based on most known properties of light have been developed over the years to remotely acquire information about such features. They include the spin angular momentum, encoded in the polarization, but not yet the orbital angular momentum encoded in its spiral spectrum. Here we put forward the potential of such spiral spectra. In particular, we use several canonical examples to show how the orbital angular momentum spectra of a light beam can be used to image a variety of intrinsic and extrinsic properties encoded, e.g., in phase and amplitude gradients, dislocations or delays.