oalib

Publish in OALib Journal

ISSN: 2333-9721

APC: Only $99

Submit

Any time

2019 ( 17 )

2018 ( 29 )

2017 ( 38 )

2016 ( 45 )

Custom range...

Search Results: 1 - 10 of 13257 matches for " Judith Cruz "
All listed articles are free for downloading (OA Articles)
Page 1 /13257
Display every page Item
Renormalization for critical orders close to 2N
Judith Cruz,Daniel Smania
Mathematics , 2010,
Abstract: We study the dynamics of the renormalization operator acting on the space of pairs (v,t), where v is a diffeomorphism and t belongs to [0,1], interpreted as unimodal maps x-->v(q_t(x)), where q_t(x)=-2t|x|^a+2t-1. We prove the so called complex bounds for sufficiently renormalizable pairs with bounded combinatorics. This allows us to show that if the critical exponent a is close to an even number then the renormalization operator has a unique fixed point. Furthermore this fixed point is hyperbolic and its codimension one stable manifold contains all infinitely renormalizable pairs.
Obsidiana gris porfírica calco-alcalina del volcán Chaitén en sitios arqueológicos al sur del río Santa Cruz, Patagonoa meridional
STERN,CHARLES R; CARACOTCHE,SOLEDAD; CRUZ,ISABEL; CHARLIN,JUDITH;
Magallania (Punta Arenas) , 2012, DOI: 10.4067/S0718-22442012000100008
Abstract: one core and two fakes of porphyritic grey rhyolite obsidian from parque nacional monte león and the pali aike volcanic feld are chemically different than the more common black, banded grey-green and green obsidian types previously described from this area of southernmost patagonia. this porphyritic grey obsidian has higher concentrations of sr and ba and lower concentrations of zr, y, nb, th, hf and yb than these other three obsidian types. in these respects this obsidian resembles calc-alkaline rhyolite from andean volcanoes rather than the peralkaline rhyolite associated with patagonian back-arc basaltic plateau volcanism. however, this porphyritic grey obsidian has low sr/y (<20) and is chemically distinct from the adakitic (sr/y >30) erupted from volcanoes in the austral volcanic zone (49-54°s) of the southernmost andes, located directly to the west of monte león and pali aike. furthermore, no rhyolite obsidian has ever been identifed in these austral volcanoes. instead, these samples of porphyritic grey obsidian have visual and chemical similarities to porphyritic grey obsidian from the chaitén volcano (42°50’s) located over 1100 km to the northwest.
Deficiência de magnésio e resistência à insulina em pacientes com diabetes mellitus tipo 2
Lima, Maria de Lourdes;Pousada, Judith;Barbosa, Cynara;Cruz, Thomaz;
Arquivos Brasileiros de Endocrinologia & Metabologia , 2005, DOI: 10.1590/S0004-27302005000600016
Abstract: magnesium is a predominantly intracellular ion, and it is a cofactor in more than 300 enzymatic reactions, like tyrosinokinase activity. its deficiency may increase insulin resistance, especially in patients with metabolic syndrome or type 2 diabetes. this study evaluated in 27 patients with poorly controlled type 2 diabetes if there was correlation between intracellular magnesium levels, laboratorial indexes of insulin resistance and glycemic control. decreased serum and intracellular magnesium depletion were found in 75% and 30.8% of patients, respectively. a negative correlation between intracellular magnesium levels (icmg) and bmi and hba1 was found. the homeostasis model assessment for insulin resistance (homa-ir) was higher than 3.0 in 59.2% of patients and there was a tendency to negative correlation with icmg levels, although without statistical significance. despite the small number of patients, this study shows that magnesium deficiency is frequent in patients with diabetes and its correlation with insulin resistance should be more studied.
Obsidiana gris porfírica calco-alcalina del volcán Chaitén en sitios arqueológicos al sur del río Santa Cruz, Patagonoa meridional Porphyritic grey calc-alkaline obsidian from Chaitén volcano in archaeological sites south of the Santa Crus river, southermost Patagonia
CHARLES R STERN,SOLEDAD CARACOTCHE,ISABEL CRUZ,JUDITH CHARLIN
Magallania , 2012,
Abstract: En el Parque Nacional Monte León y el Campo Volcánico Pali Aike se han recuperado un núcleo y dos lascas de obsidiana gris porfírica riolítica, la cual es químicamente diferente a los tipos más comunes de obsidianas (negra, gris verdosa veteada y verde) descritos para esta área del sur de Patagonia. Esta obsidiana gris porfírica tiene mayores concentraciones de Sr y Ba y menores concentraciones de Zr, y, Nb, Th, Hf y yb que los otros tres tipos de obsidiana. En estos aspectos, esta obsidiana se asemeja más a las riolitas calco-alcalinas de volcanes andinos que a las riolitas peralcalinas asociadas con el vulcanismo de retroarco de las mesetas basálticas de Patagonia. Sin embargo, esta obsidiana gris porfírica tiene baja Sr/y (<20) y es químicamente diferente de las adakitas (Sr/y >30) emitidas por los volcanes de la Zona Volcánica Austral (49-54°S) en el extremo sur de los Andes, ubicada directamente al oeste de Monte León y Pali Aike. Además, hasta la fecha no se ha identificado obsidiana riolítica en estos volcanes australes. Por otra parte, estas muestras de obsidiana gris porfírica tienen similitudes visuales y químicas con la obsidiana gris porfírica del Volcán Chaitén (42°50’S) situado a más de 1100 km al noroeste. One core and two fakes of porphyritic grey rhyolite obsidian from Parque Nacional Monte León and the Pali Aike volcanic feld are chemically different than the more common black, banded grey-green and green obsidian types previously described from this area of southernmost Patagonia. This porphyritic grey obsidian has higher concentrations of Sr and Ba and lower concentrations of Zr, y, Nb, Th, Hf and yb than these other three obsidian types. In these respects this obsidian resembles calc-alkaline rhyolite from Andean volcanoes rather than the peralkaline rhyolite associated with Patagonian back-arc basaltic plateau volcanism. However, this porphyritic grey obsidian has low Sr/y (<20) and is chemically distinct from the adakitic (Sr/y >30) erupted from volcanoes in the Austral Volcanic Zone (49-54°S) of the southernmost Andes, located directly to the west of Monte León and Pali Aike. Furthermore, no rhyolite obsidian has ever been identifed in these austral volcanoes. Instead, these samples of porphyritic grey obsidian have visual and chemical similarities to porphyritic grey obsidian from the Chaitén volcano (42°50’S) located over 1100 km to the northwest.
Estandarización de la Figura de Taylor en población mexicana
Galindo y Villa Molina, Gabriela;Balderas Cruz, María Esther;Salvador Cruz, Judith;Reyes Zamorano, Ernesto;
Salud mental , 2010,
Abstract: in order to perform a neuropsychologycal evaluation, the clinician may use several instruments; nevertheless, most of them have been designed for use on populations with very different social and cultural backgrounds from that of mexico. this makes the research on the standardization of methods of evaluation for mexican population a very important task for both clinical and research settings. normative data obtained from mexican population is necessary because it provides the clinician that works with mexican patients with a reference framework that allows him or her to correctly classify a particular behavior of an individual as normal or abnormal and thus make specific evaluations and cooperate in diagnostic. researchers interested on cognitive functioning also require qualitative and quantitative equivalent instruments that may allow them to objectively evaluate the efficacy of short-time interventions as in a pre- and post-treatment experimental designs; and it is precisely for this reason that taylor's figure was developed. taylor's figure (tf) was originally designed as an alternative to rey-osterrieth's complex figure (rocf), in order to use it in test-retest situations. similar to rocf, taylor's figure has two modalities: copy and memory. the former evaluates constructional praxia, while the latter measures immediate recalling. parallel tests, that is, different tests that evaluate the same variables, are useful because they reduce the measurement error involved in applying the task twice to the same person (i.e. learning), thus increasing the validity of follow up evaluations of cognitive functioning. <> refers to the ability for organizing and articulating several parts that lead to a whole. it's a voluntary movement directed towards the end of building upon different elements, through the use of instruments or tools. constructional praxia is the bond that brings together motor organization and viso-spatial perception in order to acc
Estandarización de la Figura de Taylor en población mexicana
Gabriela Galindo y Villa Molina,María Esther Balderas Cruz,Judith Salvador Cruz,Ernesto Reyes Zamorano
Salud mental , 2010,
Abstract: Dentro del ámbito neuropsicológico existe una serie de instrumentos de evaluación que en su mayoría han sido dise ados en un contexto sociocultural diferente al nuestro, por lo que es importante contar con pruebas neuropsicológicas estandarizadas en sujetos mexicanos. Desde esta perspectiva, los datos de una población normativa nos permiten tener un marco de referencia para comparar y establecer diagnósticos diferenciales dentro de la práctica clínica. Asimismo, dentro del ámbito de la investigación se requieren instrumentos que en teoría sean equivalentes en cuanto a la función que evalúan para llevar un seguimiento sobre el funcionamiento cognoscitivo de una población en particular a lo largo del tiempo. La Figura de Taylor se dise ó como una alternativa a la Figura Compleja de Rey-Osterrieth para aplicarla en situaciones de test-retest. Consta de dos modalidades: una de copia que evalúa la praxia de construcción y otra de memoria inmediata. El término praxia constructiva se refiere a la actividad de poner en relación, o articular entre sí, las partes para componer un todo . Es decir, es un movimiento voluntario dirigido que tiene el fin de armar o construir diferentes elementos a través del uso de instrumentos o herramientas. La praxia constructiva vincula un componente de organización motora con la percepción visoespacial y como resultado de este vínculo se ejecuta el movimiento. Con el objetivo de estandarizar la Figura de Taylor, se aplicó la prueba a una muestra compuesta por 2100 sujetos mexicanos dentro de un rango de edad de nueve a 15 a os.
A Synopsis of Pterostemon (Iteaceae), a Group Endemic to Mexico  [PDF]
Judith Márquez Guzmán, Martha Martínez Gordillo, Ramiro Cruz Durán, Jaime Jiménez Ramírez, María Cristina Pérez-Amador
American Journal of Plant Sciences (AJPS) , 2013, DOI: 10.4236/ajps.2013.412A1001
Abstract: The genus Pterostemon Schauer (Iteaceae), is a group of three species restricted in distribution to Mexico. It includes: Pterostemon mexicanus Schauer, P. rotundifolius Ramírez, and P. bravoanus J. Jiménez-Ram. & Martínez Gordillo. On the basis of field observations and herbarium specimens, we review the morphology (vegetative and reproductive), and distribution to give an updated taxonomic treatment for the genus. Additionally the utility of morphological characters is evaluated for taxomic use, and detailed taxonomic descriptions and ecological associations are given for each species.
Retrospective Study of the Use of a Fractional Radio Frequency Ablative Device in the Treatment of Acne Vulgaris and Related Acne Scars  [PDF]
Judith Hellman
Journal of Cosmetics, Dermatological Sciences and Applications (JCDSA) , 2015, DOI: 10.4236/jcdsa.2015.54038
Abstract: Background: Acne vulgaris (AV) is a common disease that often results in disfiguring facial scarring that carries into adulthood. Here we report our experience with fractional radiofrequency (FRF) device in treatment of patients with acne and acne related scarring. Materials & Methods: We retrospectively reviewed the charts of all patients with acne scarring who completed a four treatment regimen in our clinic. Results: We identified eight patients who completed four treatments with median age of 20.5 years (range 17 - 41). All patients demonstrated significant improvement of acne lesions and acne scarring. Skin biopsies demonstrated reduction of scar depth and increased new collagen production, and repopulation of the scar tissue by elastic fibers and adnexal structures after the fourth treatment. Conclusion: FRF emerges as a safe and effective treatment modality for AV and acne related scars. Further randomized controlled studies are required to fully evaluate the magnitude of this positive effect and more basic science studies are needed in order to better characterize its mechanism of action on acne lesions.
Long Term Follow-Up Results of a Fractional Radio Frequency Ablative Treatment of Acne Vulgaris and Related Acne Scars  [PDF]
Judith Hellman
Journal of Cosmetics, Dermatological Sciences and Applications (JCDSA) , 2016, DOI: 10.4236/jcdsa.2016.63013
Abstract: Introduction: Acne vulgaris and acne scarring are prevalent conditions that can have a negative effect on a patient’s quality of life. Fractional radiofrequency technologies have been shown to be clinically safe and effective in managing acne scars through dermal remodeling without causing direct damage to the epidermis. In a recently published study, we presented our clinical and histological results in the treatment of patients with active acne and acne related scarring using a Fractional RF (FRF) device. In the current article we demonstrate long term follow-up results, up to two years post last fractional treatment. Methods: Four out of the eight patients who completed a four treatment regimen were invited for long term follow-up visit to document treatment results. In some cases, touch-up treatments were conducted to optimize clinical results. Results: Patients demonstrated significant improvement of acne lesions, acne scarring, pores and skin texture. Long term photos demonstrated that clinical improvement progressed with time. Conclusion: The current study further supports the previous findings that FRF is a safe and effective treatment modality for active acne and acne related scars. Treatment protocol can be customized according to patient needs and clinical results last for long term.
Rapid Determination of Macrolide and Lincosamide Resistance in Group B Streptococcus Isolated from Vaginal-Rectal Swabs
Wilfred P. Dela Cruz,Joann Y. Richardson,Judith M. Broestler,Jennifer A. Thornton,Patrick J. Danaher
Infectious Diseases in Obstetrics and Gynecology , 2007, DOI: 10.1155/2007/46581
Abstract: Objective. Our objective was to assess the ability of real-time PCR to predict in vitro resistance in isolates of group B streptococcus (GBS). Methods. The first real-time PCR assays for the genes known to confer resistance to erythromycin and clindamycin in GBS were developed. Three hundred and forty clinical GBS isolates were assessed with these assays and compared with conventional disk diffusion. Results. The presence of an erythromycin ribosome methylation gene (ermB or ermTR variant A) predicted in vitro constitutive or inducible resistance to clindamycin with a sensitivity of 93% (95% CI 86%–97%), specificity of 90% (95% CI 85%–93%), positive predictive value of 76% (95% CI 67%–84%), and negative predictive value of 97% (95% CI 94%–99%). Conclusion. This rapid and simple assay can predict in vitro susceptibility to clindamycin within two hours of isolation as opposed to 18–24 hours via disk diffusion. The assay might also be used to screen large numbers of batched isolates to establish the prevalence of resistance in a given area.
Page 1 /13257
Display every page Item


Home
Copyright © 2008-2017 Open Access Library. All rights reserved.