iPLA2β deficiency attenuates obesity and hepatic steatosis in ob/ob mice through hepatic fatty-acyl phospholipid remodeling.

Science.gov (United States)

Deng, Xiuling; Wang, Jiliang; Jiao, Li; Utaipan, Tanyarath; Tuma-Kellner, Sabine; Schmitz, Gerd; Liebisch, Gerhard; Stremmel, Wolfgang; Chamulitrat, Walee

2016-05-01

PLA2G6 or GVIA calcium-independent PLA2 (iPLA2β) is identified as one of the NAFLD modifier genes in humans, and thought to be a target for NAFLD therapy. iPLA2β is known to play a house-keeping role in phospholipid metabolism and remodeling. However, its role in NAFLD pathogenesis has not been supported by results obtained from high-fat feeding of iPLA2β-null (PKO) mice. Unlike livers of human NAFLD and genetically obese rodents, fatty liver induced by high-fat diet is not associated with depletion of hepatic phospholipids. We therefore tested whether iPLA2β could regulate obesity and hepatic steatosis in leptin-deficient mice by cross-breeding PKO with ob/ob mice to generate ob/ob-PKO mice. Here we observed an improvement in ob/ob-PKO mice with significant reduction in serum enzymes, lipids, glucose, insulin as well as improved glucose tolerance, and reduction in islet hyperplasia. The improvement in hepatic steatosis measured by liver triglycerides, fatty acids and cholesterol esters was associated with decreased expression of PPARγ and de novo lipogenesis genes, and the reversal of β-oxidation gene expression. Notably, ob/ob livers contained depleted levels of lysophospholipids and phospholipids, and iPLA2β deficiency in ob/ob-PKO livers lowers the former, but replenished the latter particularly phosphatidylethanolamine (PE) and phosphatidylcholine (PC) that contained arachidonic (AA) and docosahexaenoic (DHA) acids. Compared with WT livers, PKO livers also contained increased PE and PC containing AA and DHA. Thus, iPLA2β deficiency protected against obesity and ob/ob fatty liver which was associated with hepatic fatty-acyl phospholipid remodeling. Our results support the deleterious role of iPLA2β in severe obesity associated NAFLD. Copyright © 2016 Elsevier B.V. All rights reserved.

Leptin differentially regulates STAT3 activation in the ob/ob mice adipose mesenchymal stem cells

Science.gov (United States)

Leptin-deficient genetically obese ob/ob mice exhibit adipocyte hypertrophy and hyperplasia as well as elevated adipose tissue and systemic inflammation. Studies have shown that multipotent stem cells isolated from adult adipose tissue can differentiate into adipocytes ex vivo and thereby contribute...

uvby and JHKL photometry of OB stars in the association Cygnus OB2

International Nuclear Information System (INIS)

Torres-Dodgen, A.V.; Carroll, M.; Tapia, M.

1991-01-01

We have obtained uvby and JHK photometry of about 80 stars in the association Cygnus OB2 (VI Cygni), including some foreground stars and three infrared sources. We present colour-colour and colour-magnitude diagrams from which we derive the interstellar extinction and approximate spectral types. We confirm that the interstellar extinction law in the direction of Cyg OB2 is similar to the galactic mean. (author)

Cordyceps militaris alleviates non-alcoholic fatty liver disease in ob/ob mice

OpenAIRE

Choi, Ha-Neul; Jang, Yang-Hee; Kim, Min-Joo; Seo, Min Jeong; Kang, Byoung Won; Jeong, Yong Kee; Kim, Jung-In

2014-01-01

BACKGROUND/OBJECTIVES Non-alcoholic fatty liver disease (NAFLD) is becoming an important public health problem as metabolic syndrome and type 2 diabetes have become epidemic. In this study we investigated the protective effect of Cordyceps militaris (C. militaris) against NAFLD in an obese mouse model. MATERIALS/METHODS Four-week-old male ob/ob mice were fed an AIN-93G diet or a diet containing 1% C. militaris water extract for 10 weeks after 1 week of adaptation. Serum glucose, insulin, free...

Genetic ablation of phosphatidylcholine transfer protein/StarD2 in ob/ob mice improves glucose tolerance without increasing energy expenditure.

Science.gov (United States)

Krisko, Tibor I; LeClair, Katherine B; Cohen, David E

2017-03-01

Phosphatidylcholine transfer protein (PC-TP; synonym StarD2) is highly expressed in liver and oxidative tissues. PC-TP promotes hepatic glucose production during fasting and aggravates glucose intolerance in high fat fed mice. However, because PC-TP also suppresses thermogenesis in brown adipose tissue (BAT), its direct contribution to obesity-associated diabetes in mice remains unclear. Here we examined the effects of genetic PC-TP ablation on glucose homeostasis in leptin-deficient ob/ob mice, which exhibit both diabetes and altered thermoregulation. Mice lacking both PC-TP and leptin (Pctp -/- ;ob/ob) were prepared by crossing Pctp -/- with ob/+ mice. Glucose homeostasis was assessed by standard assays, and energy expenditure was determined by indirect calorimetry using a comprehensive laboratory animal monitoring system, which also recorded physical activity and food intake. Body composition was determined by NMR and hepatic lipids by enzymatic assays. Core body temperature was measured using a rectal thermocouple probe. Pctp -/- ;ob/ob mice demonstrated improved glucose homeostasis, as evidenced by markedly improved glucose and pyruvate tolerance tests, without changes in insulin tolerance. However, there were no differences in EE at any ambient temperature. There were also no effects of PC-TP expression on physical activity, food intake or core body temperature. Improved glucose tolerance in Pctp -/- ;ob/ob mice in the absence of increases in energy expenditure or core body temperature indicates a direct pathogenic role for PC-TP in diabetes in leptin deficient mice. Copyright © 2016 Elsevier Inc. All rights reserved.

Manta A New BroadBand OBS

Science.gov (United States)

Hello, Y.; Yegikyan, M.; Charvis, P.; Philippe, O.

2017-12-01

Manta is a new BroadBand OBS developed at Geoazur and commercialized by Osean. The design is inspired by 3-years autonomy MUG-OBS a Multiparameter Ocean Bottom System which carry a lot of sort of sensor types. As Mug-OBS, Manta-OBS rated 6000m is designed to resist a trawling. All the components are non corrosive such polyethylene, titanium and buoyancy is ensured by syntactic foam. Equipped in standard version with a Trillium compact OBS Manta has an autonomy of 18 months, but can accept on its 4 input channels any kind of signal as low as from an hydrophone or larger from other type of a seismometer or accelerometer. Tri-axial geophones unit (2 Hz or 4.5 Hz ) can replace the seismometer and will expend the lifespan for the instrument. The seismometer is encapsulated in a central well established by four panels of the main structure to protect it from sea current convection and is decoupled from main chassis. An health bulletin is recoverable by acoustic any time to facilitate the installation and during a visit when instrument is deployed. Main parameters for acquisition can be changed by acoustics command from surface at any time. Once at the bottom, release for the main sensor installation is programmed on a timer but controlled by the tilt of the OBS. If the tilt is too important based on programmed limits, sensor will not released automatically, but this can be forced by acoustic command after returning the tilt informations to the boat operator. Manta is equipped with flash light and AIS system for easy location at recovery, and can also send it's position by Iridium satellite in case of an unexpected ascent such caused by a possible trawling if deployed in shallow water. Clock drift calculation is automatically made against GPS time signal once the OBS return at the surface. The recovery of the OBS is initiated by an acoustic command. These new features made Manta a very versatile instrument for monitoring earthquakes.

Kefir improves fatty liver syndrome by inhibiting the lipogenesis pathway in leptin-deficient ob/ob knockout mice.

Science.gov (United States)

Chen, H-L; Tung, Y-T; Tsai, C-L; Lai, C-W; Lai, Z-L; Tsai, H-C; Lin, Y-L; Wang, C-H; Chen, C-M

2014-09-01

Fatty liver disease is commonly associated with obesity, insulin resistance and diabetes. Severe fatty liver is sometimes accompanied by steatohepatitis and may lead to the development of hepatocellular carcinoma. At present, there is no effective treatment for non-alcoholic fatty liver disease (NAFLD); thus, recent investigations have focused on developing effective therapeutics to treat this condition. This study aimed to evaluate the effects of kefir on the hepatic lipid metabolism of ob/ob mice, which are commonly used to model fatty liver disease. In this study, we used leptin receptor-deficient ob/ob mice as an animal disease model of NAFLD. Six-week-old ob/ob mice were orally administered the dairy product kefir (140 mg kg(-1) of body weight (BW) per day) for 4 weeks. The data demonstrated that kefir improved fatty liver syndrome on BW, energy expenditure and basal metabolic rate by inhibiting serum glutamate oxaloacetate transaminase (GOT) and glutamate pyruvate transaminase (GPT) activities (Pkefir administration also significantly reduced the macrovesicular fat quantity in liver tissue. In addition, kefir markedly decreased the expression of the genes sterol regulatory element-binding protein 1 (SREBP1), fatty acid synthase (FAS) and acetyl-CoA carboxylase (ACC) (Pkefir improves NAFLD on BW, energy expenditure and basal metabolic rate by inhibiting the lipogenesis pathway and that kefir may have the potential for clinical application to the prevention or treatment of NAFLD.

Hypothalamic Leptin Gene Therapy Reduces Bone Marrow Adiposity in ob/ob Mice Fed Regular and High Fat Diets

Directory of Open Access Journals (Sweden)

Laurence B Lindenmaier

2016-08-01

Full Text Available Low bone mass is often associated with increased bone marrow adiposity. Since osteoblasts and adipocytes are derived from the same mesenchymal stem cell progenitor, adipocyte formation may increase at the expense of osteoblast formation. Leptin is an adipocyte-derived hormone known to regulate energy and bone metabolism. Genetic (e.g., leptin deficiency and high fat diet-induced (e.g., leptin resistance obesity are associated with increased marrow adipose tissue (MAT and reduced bone formation. Short-duration studies suggest that leptin treatment reduces MAT and increases bone formation in leptin-deficient ob/ob mice fed a regular diet. Here, we determined the long-duration impact of increased hypothalamic leptin on marrow adipocytes and osteoblasts in ob/ob mice using recombinant adeno-associated virus (rAAV gene therapy. In a first study, eight- to ten-week-old male ob/ob mice were randomized into 4 groups: (1 untreated, (2 rAAV-Lep, (3 rAAV-green fluorescent protein (rAAV-GFP, or (4 pair-fed to rAAV-Lep. For vector administration, mice were placed in a Kopf stereotaxic apparatus, and injected intracerebroventricularly with either rAAV-Lep or rAAV-GFP (9 × 107 particles in 1.5 µl. The mice were maintained for 30 weeks following vector administration. In a second study, the impact of increased hypothalamic leptin levels on MAT was determined in mice fed high fat diets. Eight- to ten-week-old male ob/ob mice were randomized into 2 groups and treated with either rAAV-Lep or rAAV-GFP. At 7 weeks post-vector administration, half the mice in each group were switched to a high fat diet for 8 weeks. Wild type (WT controls included age-matched mice fed regular or high fat diet. Hypothalamic leptin gene therapy increased osteoblast perimeter and osteoclast perimeter with minor change in cancellous bone architecture. The gene therapy decreased MAT levels in ob/ob mice fed regular or high fat diet to values similar to WT mice fed regular diet. These

Deflection routing scheme for GMPLS-based OBS networks

DEFF Research Database (Denmark)

Eid, Arafat; Mahmood, Waqar; Alomar, Anwar

2010-01-01

Integrating the Generalized Multi-Protocol Label Switching (GMPLS) framework into an Optical Burst Switching (OBS) Control Plane is a promising solution to alleviating most of OBS performance and design issues. However, implementing the already proposed OBS deflection routing schemes is not appli...

Automated identification of OB associations in M31

Science.gov (United States)

Magnier, Eugene A.; Battinelli, Paolo; Lewin, Walter H. G.; Haiman, Zoltan; Paradijs, Jan Van; Hasinger, Guenther; Pietsch, Wolfgang; Supper, Rodrigo; Truemper, Joachim

1993-01-01

A new identification of OB associations in M31 has been performed using the Path Linkage Criterion (PLC) technique of Battinelli (1991). We found 174 associations with a very small contamination (less than 5%) by random clumps of stars. The expected total number and average size of OB associations in the region of M 31 covered by our data set (Magnier et al. 1992) are approximately 280 and approximately 90 pc, respectively. M31 associations therefore have sizes similar to those of OB associations observed in nearby galaxies, so that we can consider them to be classical OB associations. This list of OB associations will be used for the study of the spatial distribution of OB associations and their correlation with other objects. Taking into account the fact that we do not cover the entire disk of M31, we extrapolate a total number of association in M31 of approximately 420.

Enhanced glucose cycling and suppressed de novo synthesis of glucose-6-phosphate result in a net unchanged hepatic glucose output in ob/ob mice

NARCIS (Netherlands)

Bandsma, RHJ; Grefhorst, A; van Dijk, TH; van der Sluijs, FH; Hammer, A; Reijngoud, DJ; Kuipers, F

2004-01-01

Aims/hypothesis. Leptin-deficient ob/ob mice are hyperinsulinaemic and hyperglycaemic; however, the cause of hyperglycaemia remains largely unknown. Methods. Glucose metabolism in vivo in 9-h fasted ob/ob mice and lean littermates was studied by infusing [U-C-13]-glucose, [2-C-13]-glycerol,

Switching performance of OBS network model under prefetched real traffic

Science.gov (United States)

Huang, Zhenhua; Xu, Du; Lei, Wen

2005-11-01

Optical Burst Switching (OBS) [1] is now widely considered as an efficient switching technique in building the next generation optical Internet .So it's very important to precisely evaluate the performance of the OBS network model. The performance of the OBS network model is variable in different condition, but the most important thing is that how it works under real traffic load. In the traditional simulation models, uniform traffics are usually generated by simulation software to imitate the data source of the edge node in the OBS network model, and through which the performance of the OBS network is evaluated. Unfortunately, without being simulated by real traffic, the traditional simulation models have several problems and their results are doubtable. To deal with this problem, we present a new simulation model for analysis and performance evaluation of the OBS network, which uses prefetched IP traffic to be data source of the OBS network model. The prefetched IP traffic can be considered as real IP source of the OBS edge node and the OBS network model has the same clock rate with a real OBS system. So it's easy to conclude that this model is closer to the real OBS system than the traditional ones. The simulation results also indicate that this model is more accurate to evaluate the performance of the OBS network system and the results of this model are closer to the actual situation.

Leptin Reduces the Expression and Increases the Phosphorylation of the Negative Regulators of GLUT4 Traffic TBC1D1 and TBC1D4 in Muscle of ob/ob Mice

Science.gov (United States)

Sáinz, Neira; Rodríguez, Amaia; Catalán, Victoria; Becerril, Sara; Ramírez, Beatriz; Lancha, Andoni; Burgos-Ramos, Emma; Gómez-Ambrosi, Javier; Frühbeck, Gema

2012-01-01

Leptin improves insulin sensitivity in skeletal muscle. Our goal was to determine whether proteins controlling GLUT4 traffic are altered by leptin deficiency and in vivo leptin administration in skeletal muscle of wild type and ob/ob mice. Leptin-deficient ob/ob mice were divided in three groups: control, leptin-treated (1 mg/kg/d) and leptin pair-fed ob/ob mice. Microarray analysis revealed that 1,546 and 1,127 genes were regulated by leptin deficiency and leptin treatment, respectively. Among these, we identified 24 genes involved in intracellular vesicle-mediated transport in ob/ob mice. TBC1 domain family, member 1 (Tbc1d1), a negative regulator of GLUT4 translocation, was up-regulated (P = 0.001) in ob/ob mice as compared to wild types. Importantly, leptin treatment reduced the transcript levels of Tbc1d1 (P<0.001) and Tbc1d4 (P = 0.004) in the leptin-treated ob/ob as compared to pair-fed ob/ob animals. In addition, phosphorylation levels of TBC1D1 and TBC1D4 were enhanced in leptin-treated ob/ob as compared to control ob/ob (P = 0.015 and P = 0.023, respectively) and pair-fed ob/ob (P = 0.036 and P = 0.034, respectively) mice. Despite similar GLUT4 protein expression in wild type and ob/ob groups a different immunolocalization of this protein was evidenced in muscle sections. Leptin treatment increased GLUT4 immunoreactivity in gastrocnemius and extensor digitorum longus sections of leptin-treated ob/ob mice. Moreover, GLUT4 protein detected in immunoprecipitates from TBC1D4 was reduced by leptin replacement compared to control ob/ob (P = 0.013) and pair-fed ob/ob (P = 0.037) mice. Our findings suggest that leptin enhances the intracellular GLUT4 transport in skeletal muscle of ob/ob animals by reducing the expression and activity of the negative regulators of GLUT4 traffic TBC1D1 and TBC1D4. PMID:22253718

Polimorfismos del gen ob en bovinos de raza holstein en la Comarca Lagunera, México

OpenAIRE

Sarai S. Mendoza-Retana; Miguel A. Gallegos-Robles; Uriel González-Salas; José L. García-Hernández; Manuel Fortis-Hernández; Cirilo Vázquez-Vázquez; Héctor I. Trejo-Escareño

2017-01-01

La Comarca Lagunera es la cuenca lechera más importante de México. En la actualidad se están utilizando diversas técnicas que permiten evaluar genéticamente el animal a una edad temprana, permitiendo seleccionar futuros reproductores con características deseables. Entre los genes relacionados con la producción de leche, se encuentran el gen Ob también llamado gen Leptina el cual actúa sobre el sistema nervioso central y tejidos periféricos jugando un papel muy importante ...

Sequential formation of subgroups in OB associations

International Nuclear Information System (INIS)

Elmegreen, B.G.; Lada, C.J.

1977-01-01

We reconsider the structure and formation of OB association in view of recent radio and infrared observations of the adjacent molecular clouds. As a result of this reexamination, we propose that OB subgroups are formed in a step-by-step process which involves the propagation of ionization (I) and shock (S) fronts through a molecular cloud complex. OB stars formed at the edge of a molecular cloud drive these I-S fronts into the cloud. A layer of dense neutral material accumulates between the I and S fronts and eventually becomes gravitationally unstable. This process is analyzed in detail. Several arguments concerning the temperature and mass of this layer suggest that a new OB subgroup will form. After approximately one-half million years, these stars will emerge from and disrupt the star-forming layer. A new shock will be driven into the remaining molecular cloud and will initiate another cycle of star formation.Several observed properties of OB associations are shown to follow from a sequential star-forming mechanism. These include the spatial separation and systematic differences in age of OB subgroups in a given association, the regularity of subgroup masses, the alignment of subgroups along the galactic plane, and their physical expansion. Detailed observations of ionization fronts, masers, IR sources, and molecular clouds are also in agreement with this model. Finally, this mechanism provides a means of dissipating a molecular cloud and exposing less massive stars (e.g., T Tauri stars) which may have formed ahead of the shock as part of the original cloud collapsed and fragmented

Searching for self-enrichment in Cygnus OB2

Science.gov (United States)

Berlanas, Sara R.; Herrero, Artemio; Comerón, Fernando; Pasquali, Anna; Simón-Díaz, Sergio

2017-11-01

Cygnus OB2 is a rich and relatively close (d~1.4 kpc) OB association in our Galaxy. It represents an ideal testbed for our theories about self-enrichment processes produced by pollution of the interstellar medium by successive generations of massive stars. Comerón & Pasquali (2012, A&A, 543, A101) found a correlation between the age of young stellar groups in Cygnus OB2 and their Galactic longitude. If is associated with a chemical composition gradient, it could support these self-enrichment processes.

Oral delivery of [D-Leu-4]-OB3 and MA-[D-Leu-4]-OB3, synthetic peptide leptin mimetics: Immunofluorescent localization in the mouse hypothalamus.

Science.gov (United States)

Anderson, Brian M; Jacobson, Lauren; Novakovic, Zachary M; Grasso, Patricia

2017-06-01

This study describes the localization of [D-Leu-4]-OB3 and MA-[D-Leu-4]-OB3, synthetic peptide leptin mimetics, in the hypothalamus of Swiss Webster and C57BL/6J wild-type mice, leptin-deficient ob/ob mice, and leptin-resistant diet-induced obese (DIO) mice. The mice were given [D-Leu-4]-OB3 or MA-[D-Leu-4]-OB3 in 0.3% dodecyl maltoside by oral gavage. Once peak serum concentrations were reached, the mice received a lethal dose of pentobarbital and were subjected to intracardiac perfusion fixation. The brains were excised, post-fixed in paraformaldehyde, and cryo-protected in sucrose. Free-floating frozen coronal sections were cut at 25-µm and processed for imaging by immunofluorescence microscopy. In all four strains of mice, dense staining was concentrated in the area of the median eminence, at the base and/or along the inner wall of the third ventricle, and in the brain parenchyma at the level of the arcuate nucleus. These results indicate that [D-Leu-4]-OB3 and MA-[D-Leu-4]-OB3 cross the blood-brain barrier and concentrate in an area of the hypothalamus known to regulate energy balance and glucose homeostasis. Most noteworthy is the localization of [D-Leu-4]-OB3 immunoreactivity within the hypothalamus of DIO mice via a conduit that is closed to leptin in this rodent model, and in most cases of human obesity. Together with our previous studies describing the effects of [D-Leu-4]-OB3 and MA-[D-Leu-4]-OB3 on energy balance, glucose regulation, and signal transduction pathway activation, these findings are consistent with a central mechanism of action for these synthetic peptide leptin mimetics, and suggest their potential usefulness in the management of leptin-resistant obesity and type 2 diabetes in humans. Copyright © 2017 Elsevier B.V. All rights reserved.

Expression of the P2X2 receptor in different classes of ileum myenteric neurons in the female obese ob/ob mouse

Science.gov (United States)

Mizuno, Márcia Sanae; Crisma, Amanda Rabello; Borelli, Primavera; Castelucci, Patricia

2012-01-01

AIM: To examine whether the ob/ob mouse model of obesity is accompanied by enteric nervous system abnormalities such as altered motility. METHODS: The study examined the distribution of the P2X2 receptor (P2X2R) in myenteric neurons of female ob/ob mice. Specifically, we used immunohistochemistry to analyze the co-expression of the P2X2R with neuronal nitric oxide synthase (nNOS), choline acetyltransferase (ChAT), and calretinin (CalR) in neurons of the small intestine myenteric plexus in ob/ob and control female mice. In these sections, we used scanning confocal microscopy to analyze the co-localization of these markers as well as the neuronal density (cm2) and area profile (μm²) of P2X2R-positive neurons. In addition, enteric neurons were labeled using the nicotinamide adenine dinucleotide (NADH) diaphorase method and analyzed with light microscopy as an alternate means by which to analyze neuronal density and area. RESULTS: In the present study, we observed a 29.6% increase in the body weight of the ob/ob animals (OG) compared to the control group (CG). In addition, the average small intestine area was increased by approximately 29.6% in the OG compared to the CG. Immunoreactivity (IR) for the P2X2R, nNOS, ChAT and CalR was detectable in the myenteric plexus, as well as in the smooth muscle, in both groups. This IR appeared to be mainly cytoplasmic and was also associated with the cell membrane of the myenteric plexus neurons, where it outlined the neuronal cell bodies and their processes. P2X2R-IR was observed to co-localize 100% with that for nNOS, ChAT and CalR in neurons of both groups. In the ob/ob group, however, we observed that the neuronal density (neuron/cm2) of P2X2R-IR cells was increased by 62% compared to CG, while that of NOS-IR and ChAT-IR neurons was reduced by 49% and 57%, respectively, compared to control mice. The neuronal density of CalR-IR neurons was not different between the groups. Morphometric studies further demonstrated that the

Reverse time migration of multiples for OBS data

KAUST Repository

Zhang, Dongliang

2014-01-01

Reverse time migration of multiples (RTMM) is applied to OBS data with sparse receiver spacing. RTMM for OBS data unlike a marine streamer acquisition is implemented in the common receiver gathers (CRG) and provides a wider and denser illumination for each CRG than the conventional RTM of primaries. Hence, while the the conventional RTM image contains strong aliasing artifacts due to a sparser receiver interval, the RTMM image suffers from this artifacts less. This benefit of RTMM is demonstrated with numerical test on the Marmousi model for sparsely sampled OBS data.

Reverse time migration of multiples for OBS data

KAUST Repository

Zhang, Dongliang

2014-08-05

Reverse time migration of multiples (RTMM) is applied to OBS data with sparse receiver spacing. RTMM for OBS data unlike a marine streamer acquisition is implemented in the common receiver gathers (CRG) and provides a wider and denser illumination for each CRG than the conventional RTM of primaries. Hence, while the the conventional RTM image contains strong aliasing artifacts due to a sparser receiver interval, the RTMM image suffers from this artifacts less. This benefit of RTMM is demonstrated with numerical test on the Marmousi model for sparsely sampled OBS data.

2MASS Identifications for Galactic OB Stars

OpenAIRE

Reed, B. Cameron

2007-01-01

Cross-identifications for 14,574 intrinsically luminous galactic stars (mostly OB stars) to objects in the 2MASS survey have been determined using a search box of +/-0.0015 degrees (+/- 5.4 arcsec) in both RA and Dec. Instructions on obtaining the relevant files can be obtained at othello.alma.edu/~reed/OB-2MASS.doc.

Obs4MIPS: Satellite Observations for Model Evaluation

Science.gov (United States)

Ferraro, R.; Waliser, D. E.; Gleckler, P. J.

2017-12-01

This poster will review the current status of the obs4MIPs project, whose purpose is to provide a limited collection of well-established and documented datasets for comparison with Earth system models (https://www.earthsystemcog.org/projects/obs4mips/). These datasets have been reformatted to correspond with the CMIP5 model output requirements, and include technical documentation specifically targeted for their use in model output evaluation. The project holdings now exceed 120 datasets with observations that directly correspond to CMIP5 model output variables, with new additions in response to the CMIP6 experiments. With the growth in climate model output data volume, it is increasing more difficult to bring the model output and the observations together to do evaluations. The positioning of the obs4MIPs datasets within the Earth System Grid Federation (ESGF) allows for the use of currently available and planned online tools within the ESGF to perform analysis using model output and observational datasets without necessarily downloading everything to a local workstation. This past year, obs4MIPs has updated its submission guidelines to closely align with changes in the CMIP6 experiments, and is implementing additional indicators and ancillary data to allow users to more easily determine the efficacy of an obs4MIPs dataset for specific evaluation purposes. This poster will present the new guidelines and indicators, and update the list of current obs4MIPs holdings and their connection to the ESGF evaluation and analysis tools currently available, and being developed for the CMIP6 experiments.

Mining the Obscured OB Star Population in Carina

Science.gov (United States)

Smith, Michael

2016-04-01

Massive OB stars are very influential objects in the ecology of galaxies like our own. Current catalogues of Galactic OB stars are heavily biased towards bright (g selected OB stars across the entire Southern Galactic plane, both within clusters and in the field, down to ∼20th magnitude in g. For the first time, a complete accounting of the OB star runaway phenomenon becomes possible. Along with making the primary selection using VPHAS+ colours, I have performed Markov-Chain Monte Carlo fitting of the spectral energy distributions of the selected stars by combining VPHAS+ u, g, r, i with published J, H, K photometry. This gives rough constraints on effective temperature and distance, whilst delivering much more precise reddening parameters A0 and RV - allowing us to build a much richer picture of how extinction and extinction laws vary across the Galactic Plane. My thesis begins with a description of the method of photometric selection of OB star candidates and its validation across a 2 square degree field including the well-known young massive star cluster Westerlund 2 (Mohr-Smith et al., 2015). Following on from this I present spectroscopy with AAOmega of 283 candidates identified by our method, which confirms that ∼94% of the sample are the expected O and early B stars. I then develop this method further and apply it to a Galactic Plane strip of 42 square-degrees that runs from the Carina Arm tangent region to the much studied massive cluster in NGC 3603. A new aspect I attend to in this expansion of method is tightening up the uniform photometric calibration of the data, paying particular attention to the always-challenging u band. This leads to a new and reliable catalogue of 5915 OB stars. As well as increasing the numbers of identified massive stars in this large region of the sky by nearly an order of magnitude, a more complete picture of massive star formation in the Carina Arm has emerged. I have found a broad over-density of O stars around the highly

New Results on the Nearest OB Association: Sco-Cen (Sco OB2)

Science.gov (United States)

Mamajek, Eric E.

2013-01-01

The Scorpius-Centaurus OB association (Sco OB2) is the nearest site of recent massive star formation to the Sun. The primary stellar groups in the Sco-Cen complex (including OB subgroups Upper Sco, Upper Cen Lup, and Lower Cen Cru, the neighboring molecular cloud complexes Lup, Cha, CrA, Oph, and dispersed young groups Eta Cha, Epsilon Cha, TW Hya, and Beta Pic) have been participants in a complex episode of stellar birth (and some stellar death) over the past ~20 Myr. Here I summarize some recent results on the Sco-Cen complex from the U. Rochester group: (1) isochronal analysis of the HR diagram positions for >1 Msun stars in the Upper Scorpius subgroup shows it to be twice as old as previously thought (11 Myr vs. 5 Myr), (2) analysis of high resolution optical echelle spectra show that the subgroups are approximately solar in composition, (3) surveys for lower mass members are showing that the complex shows more substructure than previously recognized, including at least one new subgroup ("Lower Sco"), and the velocity and age data for the nearest OB subgroup Lower Cen Cru argue for a bifurcation into a younger 10 Myr) southern part ("Crux") and an older 20 Myr) northern part ("Lower Centaurus"), (4) an eclipsing, multi-ring dust disk system was serendipitously discovered in the SuperWASP and ASAS light curve for the newly discovered K5-type Sco-Cen member 1SWASP J140747.93-394542.6. With regard to some recent results by other investigators, we find that (1) attempts by some authors to subsume the Sco-Cen subgroups into a single sample of a single age are unnecessarily mixing samples with a wide range in ages, and (2) I have been unable to replicate the expansion age determinations claimed by some investigators for the TW Hya and Beta Pic groups (both purported to have expansion ages of 8 and 12 Myr, respectively), which have been used by some investigators to independently age-date the Sco-Cen subgroups. We acknowledge support from NSF grant AST-1008908 and the

Influences of obese (ob/ob and diabetes (db/db genotype mutations on lumber vertebral radiological and morphometric indices: Skeletal deformation associated with dysregulated systemic glucometabolism

Directory of Open Access Journals (Sweden)

Garris David R

2006-02-01

Full Text Available Abstract Background Both diabetes and obesity syndromes are recognized to promote lumbar vertebral instability, premature osteodegeneration, exacerbate progressive osteoporosis and increase the propensity towards vertebral degeneration, instability and deformation in humans. Methods The influences of single-gene missense mutations, expressing either diabetes (db/db or obese (ob/ob metabolic syndromes on vertebral maturation and development in C57BL/KsJ mice were evaluated by radiological and macro-morphometric analysis of the resulting variances in osteodevelopment indices relative to control parameters between 8 and 16 weeks of age (syndrome onset @ 4 weeks, and the influences of low-dose 17-B-estradiol therapy on vertebral growth expression evaluated. Results Associated with the indicative genotypic obesity and hyper-glycemic/-insulinemic states, both db/db and ob/ob mutants demonstrated a significant (P ≤ 0.05 elongation of total lumbar vertebrae column (VC regional length, and individual lumbar vertebrae (LV1-5 lengths, relative to control VC and LV parameters. In contrast, LV1-5 width indices were suppressed in db/db and ob/ob mutants relative to control LV growth rates. Between 8 and 16 weeks of age, the suppressed LV1-5 width indices were sustained in both genotype mutant groups relative to control osteomaturation rates. The severity of LV1-5 width osteosuppression correlated with the severe systemic hyperglycemic and hypertriglyceridemic conditions sustained in ob/ob and db/db mutants. Low-dose 17-B-estradiol therapy (E2-HRx: 1.0 ug/ 0.1 ml oil s.c/3.5 days, initiated at 4 weeks of age (i.e., initial onset phase of db/db and ob/ob expressions re-established control LV 1–5 width indices without influencing VC or LV lengths in db/db groups. Conclusion These data demonstrate that the abnormal systemic endometabolic states associated with the expression of db/db and ob/ob genomutation syndromes suppress LV 1–5 width osteomaturation

[D-Leu-4]-OB3 and MA-[D-Leu-4]-OB3, small molecule synthetic peptide leptin mimetics, improve glycemic control in diet-induced obese (DIO) mice.

Science.gov (United States)

Wang, Anke; Anderson, Brian M; Novakovic, Zachary M; Grasso, Patricia

2018-03-01

We have previously shown that following oral delivery in dodecyl maltoside (DDM), [D-Leu-4]-OB3 and its myristic acid conjugate, MA-[D-Leu-4]-OB3, improved energy balance and glucose homeostasis in genetically obese/diabetic mouse models. More recently, we have provided immunohistochemical evidence indicating that these synthetic peptide leptin mimetics cross the blood-brain barrier and concentrate in the area of the arcuate nucleus of the hypothalamus in normal C57BL/6J and Swiss Webster mice, in genetically obese ob/ob mice, and in diet-induced obese (DIO) mice. In the present study, we describe the effects of oral delivery of [D-Leu-4]-OB3 and MA-[D-Leu-4]-OB3 on glycemic control in diet-induced (DIO) mice, a non-genetic rodent model of obesity and its associated insulin resistance, which more closely recapitulates common obesity and diabetes in humans. Male C57BL/6J and DIO mice, 17, 20, and 28 weeks of age, were maintained on a low-fat or high-fat diet and given vehicle (DDM) alone or [D-Leu-4]-OB3 or MA-[D-Leu-4]-OB3 in DDM by oral gavage for 12 or 14 days. Body weight gain, food and water intake, fasting blood glucose, oral glucose tolerance, and serum insulin levels were measured. Our data indicate that (1) [D-Leu-4]-OB3 and MA-[D-Leu-4]-OB3 restore glucose tolerance in male DIO mice maintained on a high-fat diet to levels comparable to those of non-obese C57BL/6J wild-type mice of the same age and sex maintained on a low-fat diet; and (2) the influence of [D-Leu-4]-OB3 and MA-[D-Leu-4]-OB3 on glycemic control appears to be independent of their effects on energy balance. These results suggest that [D-Leu-4]-OB3 and/or MA-[D-Leu-4]-OB3 may have application to the management of the majority of cases of common obesity in humans, a state characterized at least in part, by leptin resistance resulting from a defect in leptin transport across the blood-brain barrier. They further suggest that these small molecule synthetic peptide leptin mimetics, through their

Hormone-sensitive lipase deficiency suppresses insulin secretion from pancreatic islets of Lepob/ob mice

International Nuclear Information System (INIS)

Sekiya, Motohiro; Yahagi, Naoya; Tamura, Yoshiaki; Okazaki, Hiroaki; Igarashi, Masaki; Ohta, Keisuke; Takanashi, Mikio; Kumagai, Masayoshi; Takase, Satoru; Nishi, Makiko; Takeuchi, Yoshinori; Izumida, Yoshihiko; Kubota, Midori; Ohashi, Ken; Iizuka, Yoko; Yagyu, Hiroaki; Gotoda, Takanari; Nagai, Ryozo; Shimano, Hitoshi; Yamada, Nobuhiro

2009-01-01

It has long been a matter of debate whether the hormone-sensitive lipase (HSL)-mediated lipolysis in pancreatic β-cells can affect insulin secretion through the alteration of lipotoxicity. We generated mice lacking both leptin and HSL (Lep ob/ob /HSL -/- ) and explored the role of HSL in pancreatic β-cells in the setting of obesity. Lep ob/ob /HSL -/- developed elevated blood glucose levels and reduced plasma insulin levels compared with Lep ob/ob /HSL +/+ in a fed state, while the deficiency of HSL did not affect glucose homeostasis in Lep +/+ background. The deficiency of HSL exacerbated the accumulation of triglycerides in Lep ob/ob islets, leading to reduced glucose-stimulated insulin secretion. The deficiency of HSL also diminished the islet mass in Lep ob/ob mice due to decreased cell proliferation. In conclusion, HSL affects insulin secretary capacity especially in the setting of obesity.

Recent Seismic Experiments of OBS in the South China Sea

Science.gov (United States)

Ruan, A.; Li, J.; Wu, Z.

2012-12-01

Since 2006 some research institutions of China have carried out some important seismic experiments by using ocean bottom seismometer(OBS) in the South China Sea (SCS) and obtained many concrete progresses in modeling the crustal structure of SCS and also in understanding of its formation and evolution as well. In 2006 three wide-angle profiles were completed in the northern margin, named OBS2006-1 across the northwestern sub-basin, OBS2006-2 parallel to the sea basin boundary and OBS2006-3 across the Dongsha Rise and Chaoshan Depression respectively. In 2010 two wide- angle profiles were completed, named OBS2010-1 and OBS 2010-2 both perpendicular to the northern off-shore faulting system. During 2009-2011 four wide-angle profiles were completed in the southern margin, named OBS973-1 from southern margin to the southwestern sub-basin, OBS973-2 from Liyue Bank to the southwestern sub-basin and OBS973-3 from Xisha to the southwestern sub-basin, OBS2011-2 from Xisha to Hainan Island respectively. In 2011 two 3D seismic array of OBS were completed in the Zhongnan-Changlong sea mount chain and Huangyan-Zhenbei sea mount chain respectively. Here we present some primary but important results as follows. (1) The velocity model of OBS2006-1 indicates that the crust under the continental slope decreases from 21km to 11km, and to 7.7km in the northwestern sub-basin with Moho depth ascends from 21km to 11km. The tectonic geometry and velocity structure of the northwestern sub-basin and its margins on both sides shows symmetrical and conjugate and indicates pure shear mode of continental margin rifting mechanism. (2) The velocity model of OBS2006-3 reveals remarkable thickness with maximum 8 km of the Mesozoic sediment in Chaoshan Depression in which velocity increases downward from 4.4 km/s at top to 5.3 km/s at the bottom. The buried depth of Moho decreases from 24-25 km under Dongsha Rise to 17 km in the lower slope and an obviously velocity abnormal is detected in the upper

A CATALOG OF NEW SPECTROSCOPICALLY CONFIRMED MASSIVE OB STARS IN CARINA

Energy Technology Data Exchange (ETDEWEB)

Alexander, Michael J.; Hanes, Richard J.; McSwain, M. Virginia [Department of Physics, Lehigh University, 16 Memorial Drive East, Bethlehem, PA 18015 (United States); Povich, Matthew S., E-mail: alexamic@lafayette.edu, E-mail: rjh314@lehigh.edu, E-mail: mcswain@lehigh.edu, E-mail: mspovich@cpp.edu [Department of Physics and Astronomy, California State Polytechnic University, Pomona, CA 91768 (United States)

2016-12-01

The Carina star-forming region is one of the largest in the Galaxy, and its massive star population is still being unveiled. The large number of stars combined with high, and highly variable, interstellar extinction makes it inherently difficult to find OB stars in this type of young region. We present the results of a spectroscopic campaign to study the massive star population of the Carina Nebula, with the primary goal to confirm or reject previously identified Carina OB star candidates. A total of 141 known O- and B-type stars and 94 candidates were observed, of which 73 candidates had high enough signal-to-noise ratio to classify. We find 23 new OB stars within the Carina Nebula, a 32% confirmation rate. One of the new OB stars has blended spectra and is suspected to be a double-lined spectroscopic binary (SB2). We also reclassify the spectral types of the known OB stars and discover nine new SB2s among this population. Finally, we discuss the spatial distribution of these new OB stars relative to known structures in the Carina Nebula.

Arctigenin, a natural compound, activates AMP-activated protein kinase via inhibition of mitochondria complex I and ameliorates metabolic disorders in ob/ob mice.

Science.gov (United States)

Huang, S-L; Yu, R-T; Gong, J; Feng, Y; Dai, Y-L; Hu, F; Hu, Y-H; Tao, Y-D; Leng, Y

2012-05-01

Arctigenin is a natural compound that had never been previously demonstrated to have a glucose-lowering effect. Here it was found to activate AMP-activated protein kinase (AMPK), and the mechanism by which this occurred, as well as the effects on glucose and lipid metabolism were investigated. 2-Deoxyglucose uptake and AMPK phosphorylation were examined in L6 myotubes and isolated skeletal muscle. Gluconeogenesis and lipid synthesis were evaluated in rat primary hepatocytes. The acute and chronic effects of arctigenin on metabolic abnormalities were observed in C57BL/6J and ob/ob mice. Changes in mitochondrial membrane potential were measured using the J-aggregate-forming dye, JC-1. Analysis of respiration of L6 myotubes or isolated mitochondria was conducted in a channel oxygen system. Arctigenin increased AMPK phosphorylation and stimulated glucose uptake in L6 myotubes and isolated skeletal muscles. In primary hepatocytes, it decreased gluconeogenesis and lipid synthesis. The enhancement of glucose uptake and suppression of hepatic gluconeogenesis and lipid synthesis by arctigenin were prevented by blockade of AMPK activation. The respiration of L6 myotubes or isolated mitochondria was inhibited by arctigenin with a specific effect on respiratory complex I. A single oral dose of arctigenin reduced gluconeogenesis in C57BL/6J mice. Chronic oral administration of arctigenin lowered blood glucose and improved lipid metabolism in ob/ob mice. This study demonstrates a new role for arctigenin as a potent indirect activator of AMPK via inhibition of respiratory complex I, with beneficial effects on metabolic disorders in ob/ob mice. This highlights the potential value of arctigenin as a possible treatment of type 2 diabetes.

Zinc metabolism in genetically obese (ob/ob) mice

International Nuclear Information System (INIS)

Kennedy, M.L.; Failla, M.L.

1987-01-01

Recent reports indicate that the concentrations and total amounts of several essential trace metals in various tissues of genetically obese rodents differ markedly from those in lean controls. In the present studies the absorption, retention and tissue distribution of zinc and constitutive levels of zinc-metallothionein (Zn-MT) in selected tissues were compared in obese (ob/ob) and lean (+/?) C57BL/6J mice. When 5-, 10- and 22-wk-old mice were administered 1.2 mumol 65 Zn by stomach tube the apparent absorption of 65 Zn by obese mice was 1.5, 2.2 and 3.9 times higher, respectively, than that in age-matched lean mice. Retention of orally administered 65 Zn after 96 h was also substantially higher in obese mice than in lean mice. To assess the possible influences of hyperphagia and intestinal hypertrophy on the enhanced apparent absorption of 65 Zn by obese mice food intake by an additional group of obese mice was restricted to that of age-matched lean controls. When actual absorption of zinc was determined according to the method of Heth and Hoekstra, groups of ad libitum--fed obese, pair-fed obese and lean mice absorbed 38, 32 and 18% of administered 65 Zn, respectively. In contrast, the rate of 65 Zn excretion 2-6 d after oral or subcutaneous administration of the metal was similar for obese and lean mice. Unrestricted and pair-fed obese mice had significantly lower percentages of carcass 65 Zn present in skin, muscle plus bone, spleen and testes and higher percentages present in liver, small intestine and adipose tissue than lean mice

Modelling of slag emulsification and slag reduction in CAS-OB process

OpenAIRE

Sulasalmi, P. (Petri)

2016-01-01

Abstract Composition Adjustment by Sealed argon bubbling – Oxygen Blowing (CAS-OB) process is a ladle treatment process that was developed for chemical heating and alloying of steel. The main stages of the process are heating, (possible) alloying and reduction of slag. The CAS-OB process aims for homogenization and control of the composition and temperature of steel. In this dissertation, a mathematical reaction model was developed for the slag reduction stage of the CAS-OB process. Sl...

Representações sociais de adolescentes sobre o câncer de colo do útero

OpenAIRE

de Lima Fernandes, Danielle

2011-01-01

As representações sociais podem influenciar o comportamento. Por isso, esta dissertação se baseou na seguinte questão: quais as representações sociais das adolescentes sobre o câncer do colo do útero? O artigo de revisão teve como objetivo identificar as evidências científicas sobre as representações sociais do câncer de colo do útero nas publicações científicas. As bases de dados pesquisadas foram LILACS, ADOLEC, BDENF e MEDLINE, resultando em cinco artigos após seleção que ob...

Variability of X-ray emission from OB stars

International Nuclear Information System (INIS)

Collura, A.; Sciortino, S.; Serio, S.; Vaiana, G. S.; Harnden, F.R. JR.; Osservatorio Astronomico, Palermo, Italy; Harvard-Smithsonian Center for Astrophysics, Cambridge, MA)

1989-01-01

The variability in soft X-ray emission of 12 OB stars is studied. Two different methods of analysis, one more suitable for detecting short-term variations, the other aimed at detecting long time-scale variations, are applied to all stars in the sample. The long-term variability analysis shows that Cyg-OB2 8A Zeta Pup and Delta Ori exhibit significant count rate variations between different data sections. Similar variations are marginally detected in 15 Mon; the count rate variations for the other eight stars are consistent with statistical fluctuations. The light curve of Cyg-OB2 8A suggests the existence of two different emission levels. The short-term variability analysis detects marginal variability in Tau Sco with an effective amplitude of about 30 percent and a time scale of about 50 s. The upper limits to the effective short-term variability amplitude for all other sample stars are in the 10-30 percent range. 30 refs

Impaired transport of thyroid hormones into livers of obese (ob/ob) mice

International Nuclear Information System (INIS)

Hillgartner, F.B.; Romsos, D.R.

1988-01-01

Obese (ob/ob) mice exhibit impaired hepatic thyroid hormone action that is mediated, at least in part, by a reduced nuclear 3,5,3'-triiodothyronine (T 3 ) receptor occupancy. The possibility that lowered occupancy in obese mice may be caused by decreased transport of T 3 across the hepatic plasma membrane was examined by measuring the unidirectional influx of [ 125 I]T 3 into livers of 8- to 10-wk-old obese and lean mice using a tissue-sampling portal vein-injection technique. Influx of [ 125 I]thyroxine (T 4 ), a substrate for T 4 5'-deiodinase, was also measured. Unidirectional clearance of T 3 and T 4 was 64 and 80% lower, respectively, in obese mice than in lean mice. Hepatic T 3 and T 4 uptake was nonsaturable in both lean and obese mice, suggesting that transport occurs by lipid-mediated free diffusion. Clearance of another lipid-soluble hormone, hydrocortisone, was also lower in obese mice than in lean mice. Decreased membrane permeability to the above hormones in obese mice may result from reported changes in membrane lipid composition. In conclusion, decreased hepatic thyroid hormone uptake may contribute to impaired thyroid hormone action and T 3 production in livers of obese mice

Nuclear triiodothyronine receptor binding characteristics and occupancy in obese (ob/ob) mice

International Nuclear Information System (INIS)

Hillgartner, F.B.; Romsos, D.R.

1987-01-01

Obese (ob/ob) mice exhibit reduced adaptive thermogenesis associated with an impairment of thyroid hormone action. The mechanism underlying the latter defect was investigated by comparing the binding characteristics and occupancy of solubilized nuclear 3,5,3'-triiodothyronine (T 3 ) receptors from livers of lean and obese mice. T 3 concentration was measured by radioimmunoassay. Scatchard analysis showed minimal differences in B/sub max/ and K/sub d/ between phenotypes at both 4 and 8-10 wk of age, indicating that reduced hepatic thyroid hormone expression in obese mice is not caused by alterations in nuclear receptor concentration or affinity. In contrast, nuclear T 3 receptor occupancy (endogenous T 3 associated with the specific receptor divided by B/sub max/) was 14 and 23% lower in 4- and 8- to 10-wk old obese mice, respectively. Together with reported changes in hepatic thyroid hormone-sensitive enzymes, these data are consistent with a diminished nuclear T 3 signal initiating thyroid hormone action in obese mice. Decreased nuclear T 3 receptor occupancy may be secondary to a low transport of plasma T 3 to the nuclear pool. In conclusion, impaired hepatic thyroid hormone action in obese mice is mediated in part at least by a reduction in nuclear T 3 receptor occupancy

Observations of mass loss from OB and Wolf-Rayet stars

International Nuclear Information System (INIS)

Barlow, M.J.

1982-01-01

In this review, three observationally accessible parameters of the winds of OB and Wolf-Rayet stars are discussed: (1) Terminal velocities, (2) Velocity laws, (3) Mass loss rates. In addition, some discussion of the ionisation structure of the winds is included. In general, only the most recent results for OB stars are mentioned. (Auth.)

COSMIC ORIGINS SPECTROGRAPH OBSERVATIONS OF TRANSLUCENT CLOUDS: Cyg OB2 8A

International Nuclear Information System (INIS)

Snow, Theodore P.; Destree, Joshua D.; Burgh, Eric B.; Ferguson, Ryan M.; Danforth, Charles W.; Cordiner, Martin

2010-01-01

Data from the Cosmic Origins Spectrograph (COS) are presented for the first highly reddened target (Cyg OB2 8A) under the COS Science Team's guaranteed time allocation. Column densities of ionic, atomic, and molecular species are reported and implications are discussed. Data from Cyg OB2 8A demonstrate the ability to analyze highly reddened interstellar sight lines with the COS that were unavailable to previous UV instruments. Measured column densities indicate that the Cyg OB2 8A line of sight contains multiple diffuse clouds rather than a dominant translucent cloud.

Dietary Capsaicin Improves Glucose Homeostasis and Alters the Gut Microbiota in Obese Diabetic ob/ob Mice

Directory of Open Access Journals (Sweden)

Jun-Xian Song

2017-08-01

Full Text Available Background: The effects of capsaicin on obesity and glucose homeostasis are still controversial and the mechanisms underlying these effects remain largely unknown. This study aimed to investigate the potential relationship between the regulation of obesity and glucose homeostasis by dietary capsaicin and the alterations of gut microbiota in obese diabetic ob/ob mice.Methods: The ob/ob mice were subjected to a normal, low-capsaicin (0.01%, or high-capsaicin (0.02% diet for 6 weeks, respectively. Obesity phenotypes, glucose homeostasis, the gut microbiota structure and composition, short-chain fatty acids, gastrointestinal hormones, and pro-inflammatory cytokines were measured.Results: Both the low- and high-capsaicin diets failed to prevent the increase in body weight, adiposity index, and Lee's obesity index. However, dietary capsaicin at both the low and high doses significantly inhibited the increase of fasting blood glucose and insulin levels. These inhibitory effects were comparable between the two groups. Similarly, dietary capsaicin resulted in remarkable improvement in glucose and insulin tolerance. In addition, neither the low- nor high-capsaicin diet could alter the α-diversity and β-diversity of the gut microbiota. Taxonomy-based analysis showed that both the low- and high-capsaicin diets, acting in similar ways, significantly increased the Firmicutes/Bacteroidetes ratio at the phylum level as well as increased the Roseburia abundance and decreased the Bacteroides and Parabacteroides abundances at the genus level. Spearman's correlation analysis revealed that the Roseburia abundance was negatively while the Bacteroides and Parabacteroides abundances were positively correlated to the fasting blood glucose level and area under the curve by the oral glucose tolerance test. Finally, the low- and high-capsaicin diets significantly increased the fecal butyrate and plasma total GLP-1 levels, but decreased plasma total ghrelin, TNF-α, IL-1�

NEAR INFRARED DIFFUSE INTERSTELLAR BANDS TOWARD THE CYGNUS OB2 ASSOCIATION

Energy Technology Data Exchange (ETDEWEB)

Hamano, Satoshi; Kondo, Sohei; Sameshima, Hiroaki; Nakanishi, Kenshi; Kawakita, Hideyo [Laboratory of Infrared High-resolution Spectroscopy, Koyama Astronomical Observatory, Kyoto Sangyo University, Motoyama, Kamigamo, Kita-ku, Kyoto 603-8555 (Japan); Kobayashi, Naoto [Institute of Astronomy, School of Science, University of Tokyo, 2-21-1 Osawa, Mitaka, Tokyo 181-0015 (Japan); Ikeda, Yuji [Photocoding, 460-102 Iwakura-Nakamachi, Sakyo-ku, Kyoto, 606-0025 (Japan); Yasui, Chikako; Mizumoto, Misaki; Matsunaga, Noriyuki; Fukue, Kei; Yamamoto, Ryo; Izumi, Natsuko [Department of Astronomy, Graduate School of Science, University of Tokyo, Bunkyo-ku, Tokyo 113-0033 (Japan); Mito, Hiroyuki [Kiso Observatory, Institute of Astronomy, School of Science, The University of Tokyo, 10762-30 Mitake, Kiso-machi, Kiso-gun, Nagano, 397-0101 (Japan); Nakaoka, Tetsuya; Kawanishi, Takafumi; Kitano, Ayaka; Otsubo, Shogo [Department of Physics, Faculty of Sciences, Kyoto Sangyo University, Motoyama, Kamigamo, Kita-ku, Kyoto 603-8555 (Japan); Kinoshita, Masaomi, E-mail: hamano@cc.kyoto-su.ac.jp [Solar-Terrestrial Environment Laboratory, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi, 464-8601 (Japan)

2016-04-10

We obtained the near-infrared (NIR) high-resolution (R ≡ λ/Δλ ∼ 20,000) spectra of the seven brightest early-type stars in the Cygnus OB2 association for investigating the environmental dependence of diffuse interstellar bands (DIBs). The WINERED spectrograph mounted on the Araki 1.3 m telescope in Japan was used to collect data. All 20 of the known DIBs within the wavelength coverage of WINERED (0.91 < λ < 1.36 μm) were clearly detected along all lines of sight because of their high flux density in the NIR wavelength range and the large extinction. The equivalent widths (EWs) of DIBs were not correlated with the column densities of C{sub 2} molecules, which trace the patchy dense component, suggesting that the NIR DIB carriers are distributed mainly in the diffuse component. On the basis of the correlations among the NIR DIBs both for stars in Cyg OB2 and stars observed previously, λλ10780, 10792, 11797, 12623, and 13175 are found to constitute a “family,” in which the DIBs are correlated well over the wide EW range. In contrast, the EW of λ10504 is found to remain almost constant over the stars in Cyg OB2. The extinction estimated from the average EW of λ10504 (A{sub V} ∼ 3.6 mag) roughly corresponds to the lower limit of the extinction distribution of OB stars in Cyg OB2. This suggests that λ10504 is absorbed only by the foreground clouds, implying that the carrier of λ10504 is completely destroyed in Cyg OB2, probably by the strong UV radiation field. The different behaviors of the DIBs may be caused by different properties of the DIB carriers.

ObsPy: A Python Toolbox for Seismology

Science.gov (United States)

Krischer, Lion; Megies, Tobias; Sales de Andrade, Elliott; Barsch, Robert; MacCarthy, Jonathan

2017-04-01

In recent years the Python ecosystem evolved into one of the most powerful and productive scientific environments across disciplines. ObsPy (https://www.obspy.org) is a fully community-driven, open-source project dedicated to providing a bridge for seismology into that ecosystem. It does so by offering Read and write support for essentially every commonly used data format in seismology with a unified interface and automatic format detection. This includes waveform data (MiniSEED, SAC, SEG-Y, Reftek, …) as well as station (SEED, StationXML, …) and event meta information (QuakeML, ZMAP, …). Integrated access to the largest data centers, web services, and real-time data streams (FDSNWS, ArcLink, SeedLink, ...). A powerful signal processing toolbox tuned to the specific needs of seismologists. Utility functionality like travel time calculations with the TauP method, geodetic functions, and data visualizations. ObsPy has been in constant development for more than seven years and is developed and used by scientists around the world with successful applications in all branches of seismology. Additionally it nowadays serves as the foundation for a large number of more specialized packages. This presentation will give a short overview of the capabilities of ObsPy and point out several representative or new use cases. Additionally we will discuss the road ahead as well as the long-term sustainability of open-source scientific software.

Advective transport observations with MODPATH-OBS--documentation of the MODPATH observation process

Science.gov (United States)

Hanson, R.T.; Kauffman, L.K.; Hill, M.C.; Dickinson, J.E.; Mehl, S.W.

2013-01-01

The MODPATH-OBS computer program described in this report is designed to calculate simulated equivalents for observations related to advective groundwater transport that can be represented in a quantitative way by using simulated particle-tracking data. The simulated equivalents supported by MODPATH-OBS are (1) distance from a source location at a defined time, or proximity to an observed location; (2) time of travel from an initial location to defined locations, areas, or volumes of the simulated system; (3) concentrations used to simulate groundwater age; and (4) percentages of water derived from contributing source areas. Although particle tracking only simulates the advective component of conservative transport, effects of non-conservative processes such as retardation can be approximated through manipulation of the effective-porosity value used to calculate velocity based on the properties of selected conservative tracers. This program can also account for simple decay or production, but it cannot account for diffusion. Dispersion can be represented through direct simulation of subsurface heterogeneity and the use of many particles. MODPATH-OBS acts as a postprocessor to MODPATH, so that the sequence of model runs generally required is MODFLOW, MODPATH, and MODPATH-OBS. The version of MODFLOW and MODPATH that support the version of MODPATH-OBS presented in this report are MODFLOW-2005 or MODFLOW-LGR, and MODPATH-LGR. MODFLOW-LGR is derived from MODFLOW-2005, MODPATH 5, and MODPATH 6 and supports local grid refinement. MODPATH-LGR is derived from MODPATH 5. It supports the forward and backward tracking of particles through locally refined grids and provides the output needed for MODPATH_OBS. For a single grid and no observations, MODPATH-LGR results are equivalent to MODPATH 5. MODPATH-LGR and MODPATH-OBS simulations can use nearly all of the capabilities of MODFLOW-2005 and MODFLOW-LGR; for example, simulations may be steady-state, transient, or a combination

The OB run-away stars from Sco-Cen and Orion reviewed

International Nuclear Information System (INIS)

Blaauw, A.

1989-01-01

The author studies the past paths of the run-away star Zeta Oph from the OB association Sco-Cen, and of the run-away stars AE Aur, Mu Col and 53 Ari from the OB association Ori OB1, in connection with the question of the origin of these high velocities. Should the binary-hypothesis be adhered to (supernova explosion of one of the components) or, perhaps, dynamical evolution in young, dense clusters offer a clue to this phenomenon? It is shown that the latter hypothesis is very unlikely to apply to Zeta Oph. For the run-away stars from Orion conclusive evidence may well be obtained in the course of the next decade, from improved accuracy of the proper motions

The Seismic Broad Band Western Mediterranean (wm) Network and the Obs Fomar Pool: Current state and Obs activities.

Science.gov (United States)

Pazos, Antonio; Davila, Jose Martin; Buforn, Elisa; Bezzeghoud, Mourad; Harnafi, Mimoun; Mattesini, Mauricio; Caldeira, Bento; Hanka, Winfried; El Moudnib, Lahcen; Strollo, Angelo; Roca, Antoni; Lopez de Mesa, Mireya; Dahm, Torsten; Cabieces, Roberto

2016-04-01

The Western Mediterranean (WM) seismic network started in 1996 as an initiative of the Royal Spanish Navy Observatory (ROA) and the Universidad Complutense de Madrid (UCM), with the collaboration of the GeoForschungsZentrum (GFZ) of Potsdam. A first broad band seismic station (SFUC) was installed close to Cádiz (South Spain). Since then, additional stations have been installed in the Ibero-Moghrebian region. In 2005, the "WM" code was assigned by the FDSN and new partners were jointed: Evora University (UEVO, Portugal), the Scientifique Institute of Rabat (ISRABAT, Morocco), and GFZ. Now days, the WM network is composed by 15 BB stations, all of them with Streckaisen STS-2 or STS-2.5 sensors, Quanterra or Earthdata digitizers and SeiscomP. Most them have co-installed a permanent geodetic GPS stations, and some them also have an accelerometer. There are 10 stations deployed in Spanish territory (5 in the Iberian peninsula, 1 in Balearic islands and 4 in North Africa Spanish places) with VSAT or Internet communications, 2 in Portugal (one of them without real time), and 3 in Morocco (2 VSAT and 1 ADSL). Additionally, 2 more stations (one in South Spain and one in Morocco) will be installed along this year. Additionally ROA has deployed a permanent real time VBB (CMG-3T: 360s) station at the Alboran Island. Due to the fact that part of the seismic activity is located at marine areas, and also because of the poor geographic azimuthal coverage at some zones provided by the land stations (specially in the SW of the San Vicente Cape area), ROA and UCM have acquired six broad band "LOBSTERN" OBS, manufactured by KUM (Kiel, Germany), conforming the OBS FOMAR pool. Three of them with CMG-40T sensor and the other with Trillium 120. These OBS were deployed along the Gibraltar strait since January to November 2014 to study the microseismicity in the Gibraltar strait area. In September 2015 FOMAR network has been deployed in SW of the San Vicente Cape for 8 months as a part of

Formation of massive stars in OB associations and giant molecular clouds

International Nuclear Information System (INIS)

Lada, C.J.

1980-01-01

Certain interesting patterns are being perceived in the morphology of the regions which have recently produced massive OB stars. In particular, current evidence seems to favour the notion that the formation of massive stars takes place at the edges and not the centres of large molecular cloud complexes. It is this aspect of the observations that is discussed in the present paper. The phenomena described here will pertain to massive stars only. Specifically, stars with spectral types earlier than B3 will be considered since it is usually only these stars that produce sufficient havoc (e.g., maser sources, CO bright spots, H II regions) to noticeably affect their early environments. The corresponding phenomena for lower mass stars could be entirely different. A review is first presented of what has been learned about the OB star formation process from studies of the visible OB stars themselves. Then, newly derived information pertaining to the most recent episodes of OB star birth in galactic molecular clouds is discussed. Finally, a short discussion of the significance of the results and their implications for possible star formation mechanisms will be made. (U.K.)

OBS Technologies and permanent seismic Stations at Sea

Science.gov (United States)

Makris, J.; Nikolova, S. B.

2003-04-01

An off-shore telemetric system was developed during last 2 years. It consists of a buoy unit, OBS with seismic sensor and digitizer at the sea floor and coaxial cable for transferring data from the sea. The buoy unit includes all components for recording and transmitting data to the base station. A solar panel and wind generator are the sources of energy that charge the batteries in the buoy. An Omni directional antenna and a radio modem are used for data transfer. The buoy can be connected also to mobile network or satellite. The Seismic recording unit is SEDIS IV developed in GeoPro GmbH which is a 6 channel data logger equipped with a hard disk of 30 GByte capacity and a flash memory of 0.5 Gbyte which can continuously record at different sampling rate (from 31.25 to 1000sps). The operating system for SEDIS IV is LINUX, with possible data compression, event location and extraction. The data transfer and supply of the power to seismometer and ADC unit in OBS sphere is done through coaxial cable, connecting the buoy unit and OBS. The whole system was tested for a period of one month (October 2002) within frame of Nestor program in Pilos (Greece) and worked successfully.

Expressão do gene da leptina e seu receptor Ob-Rb no parênquima mamário de novilhas leiteiras Leptin and leptin receptor Ob-Rb gene expression in mammary parenchyma of dairy heifers

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Betina Joyce Lew

2012-05-01

Full Text Available Objetivou-se com este trabalho avaliar os efeitos de uma dieta de alto nível de energia e proteína combinada com a aplicação de bST no perfil de expressão dos genes da leptina e de seu receptor Ob-Rb no parênquima mamário de novilhas leiteiras. Foram utilizadas amostras de parênquima mamário de 32 novilhas holandesas distribuídas aleatoriamente em quatro tratamentos (n=8: dieta com alto ou baixo teor de energia e proteína combinada ou não com a aplicação de bST. O delineamento utilizado foi em blocos casualizados com arranjo de tratamentos em esquema fatorial 2 × 2. A extração do RNA total das amostras de tecido foi feita e o nível de expressão gênica foi analisado por qRT-PCR utilizando-se o gene da glicuronidase β como controle, pelo método 2-ΔΔCt. Animais que receberam a dieta com alto conteúdo de energia e proteína apresentaram maior expressão de mRNA de leptina, com aumento de 56%, e menor expressão de mRNA do receptor Ob-Rb, com redução de 18%. Por outro lado, a aplicação de bST resultou em diminuição da expressão do mRNA de leptina e do receptor Ob-Rb em 74% e 23%, respectivamente. Não houve interação entre dieta e aplicação de bST. O aumento na expressão de leptina pode explicar, ao menos em parte, os efeitos negativos da dieta de alta energia e proteína, oferecida no período pré-púbere, sobre a produção de leite de novilhas leiteiras.The objective of this study was to examine the effects of a diet with high level of energy and protein, combined with bST injections, on leptin and leptin-receptor (Ob-Rb gene expression profile in the mammary parenchyma of dairy heifers. Mammary parenchyma samples from 32 Holstein heifers, randomly assigned to one of four treatments (n=8, were utilized: high or low energy and protein diet, with or without bST injection. The experiment was designed in randomized blocks and arranged in a 2 × 2 factorial arrangement. Total RNA was extracted from tissue samples

The Overt Behaviour Scale-Self-Report (OBS-SR) for acquired brain injury: exploratory analysis of reliability and validity.

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Kelly, Glenn; Simpson, Grahame K; Brown, Suzanne; Kremer, Peter; Gillett, Lauren

2017-05-23

The objectives were to test the properties, via a psychometric study, of the Overt Behaviour Scale-Self-Report (OBS-SR), a version of the OBS-Adult Scale developed to provide a client perspective on challenging behaviours after acquired brain injury. Study sample 1 consisted of 37 patients with primary brain tumour (PBT) and a family-member informant. Sample 2 consisted of 34 clients with other acquired brain injury (mixed brain injury, MBI) and a service-provider informant. Participants completed the OBS-SR (at two time points), and the Awareness Questionnaire (AQ) and Mayo Portland Adaptability Inventory-III (MPAI-III) once; informants completed the OBS-Adult and AQ once only. PBT-informant dyads displayed "good" levels of agreement (ICC 2,k  = .74; OBS-SR global index). Although MBI-informant dyads displayed no agreement (ICC 2,k  = .22; OBS-SR global index), the sub-group (17/29) rated by clinicians as having moderate to good levels of awareness displayed "fair" agreement (ICC 2,k  = .58; OBS-SR global index). Convergent/divergent validity was demonstrated by significant correlations between OBS-SR subscales and MPAI-III subscales with behavioural content (coefficients in the range .36 -.61). Scores had good reliability across one week (ICC 2,k  = .69). The OBS-SR took approximately 15 minutes to complete. It was concluded that the OBS-SR demonstrated acceptable reliability and validity, providing a useful resource in understanding clients' perspectives about their behaviour.

Search for OB stars running away from young star clusters. I. NGC 6611

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Gvaramadze, V. V.; Bomans, D. J.

2008-11-01

N-body simulations have shown that the dynamical decay of the young (~1 Myr) Orion Nebula cluster could be responsible for the loss of at least half of its initial content of OB stars. This result suggests that other young stellar systems could also lose a significant fraction of their massive stars at the very beginning of their evolution. To confirm this expectation, we used the Mid-Infrared Galactic Plane Survey (completed by the Midcourse Space Experiment satellite) to search for bow shocks around a number of young (⪉several Myr) clusters and OB associations. We discovered dozens of bow shocks generated by OB stars running away from these stellar systems, supporting the idea of significant dynamical loss of OB stars. In this paper, we report the discovery of three bow shocks produced by O-type stars ejected from the open cluster NGC 6611 (M16). One of the bow shocks is associated with the O9.5Iab star HD165319, which was suggested to be one of “the best examples for isolated Galactic high-mass star formation” (de Wit et al. 2005, A&A, 437, 247). Possible implications of our results for the origin of field OB stars are discussed.

ADDITIONAL MASSIVE BINARIES IN THE CYGNUS OB2 ASSOCIATION

International Nuclear Information System (INIS)

Kiminki, Daniel C.; Kobulnicky, Henry A.; Ewing, Ian; Lundquist, Michael; Alexander, Michael; Vargas-Alvarez, Carlos; Choi, Heather; Bagley Kiminki, Megan M.; Henderson, C. B.

2012-01-01

We report the discovery and orbital solutions for two new OB binaries in the Cygnus OB2 Association, MT311 (B2V + B3V) and MT605 (B0.5V + B2.5:V). We also identify the system MT429 as a probable triple system consisting of a tight eclipsing 2.97 day B3V+B6V pair and a B0V at a projected separation of 138 AU. We further provide the first spectroscopic orbital solutions to the eclipsing, double-lined, O-star binary MT696 (O9.5V + B1:V), the double-lined, early B binary MT720 (B0-1V + B1-2V), and the double-lined, O-star binary MT771 (O7V + O9V). These systems exhibit orbital periods between 1.5 days and 12.3 days, with the majority having P <6 days. The two new binary discoveries and six spectroscopic solutions bring the total number of known massive binaries in the central region of the Cygnus OB2 Association to 20, with all but two having full orbital solutions.

ADDITIONAL MASSIVE BINARIES IN THE CYGNUS OB2 ASSOCIATION

Energy Technology Data Exchange (ETDEWEB)

Kiminki, Daniel C.; Kobulnicky, Henry A.; Ewing, Ian; Lundquist, Michael; Alexander, Michael; Vargas-Alvarez, Carlos; Choi, Heather [Department of Physics and Astronomy, University of Wyoming, Laramie, WY 82070 (United States); Bagley Kiminki, Megan M. [Department of Astronomy, University of Arizona, Tucson, AZ 85721 (United States); Henderson, C. B. [Department of Astronomy, Ohio State University, Columbus, OH 43210 (United States)

2012-03-01

We report the discovery and orbital solutions for two new OB binaries in the Cygnus OB2 Association, MT311 (B2V + B3V) and MT605 (B0.5V + B2.5:V). We also identify the system MT429 as a probable triple system consisting of a tight eclipsing 2.97 day B3V+B6V pair and a B0V at a projected separation of 138 AU. We further provide the first spectroscopic orbital solutions to the eclipsing, double-lined, O-star binary MT696 (O9.5V + B1:V), the double-lined, early B binary MT720 (B0-1V + B1-2V), and the double-lined, O-star binary MT771 (O7V + O9V). These systems exhibit orbital periods between 1.5 days and 12.3 days, with the majority having P <6 days. The two new binary discoveries and six spectroscopic solutions bring the total number of known massive binaries in the central region of the Cygnus OB2 Association to 20, with all but two having full orbital solutions.

The performance study of oxide by-passed(OB) lateral double diffused MOSFET

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Tang, Pan-pan

2016-10-01

An SOI LDMOS device structure with Oxide By-passed(OB) was investigated and its breakdown mechanism and characteristic of structure was analyzed. Its performance was verified by 3D numerical simulation with SILVACO TCAD software. The simulated results show that the electrical field element of the device is modulated by the concept of similar Superjunction(SJ) structure. Compared with the SJ LDMOS device, OB LDMOS obtains the same breakdown voltage, simultaneously the specific on-resistance of the OB LDMOS reduces from 3.81mΩ·cm2 to 1.96mΩ·cm2, except for achieving comparable performance and overcoming the high aspect ratio of fabrication structure and the difficulty of accurate concentration match of SJ LDMOS.

Leptin as well as Free Leptin Receptor Is Associated with Polycystic Ovary Syndrome in Young Women

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Rizk, Nasser M.; Sharif, Elham

2015-01-01

Background and Aim. Leptin has two forms in the circulation: free and bound forms. The soluble leptin receptor (sOB-R) circulates in the blood and can bind to leptin. The aim of this study is to assess the concentrations of the leptin and the sOB-R in PCOS and its relation to adiposity, insulin resistance, and androgens. Methods. A cross-sectional study included 78 female students aged 17–25 years. Fasting serum leptin and sOB-R concentrations were measured. The anthropometric variables and the hormonal profile such as insulin, female and male sex hormones, and prolactin were assessed. Results. In PCOS, leptin level (ng/ml) and free leptin index (FLI) increased significantly while sOB-R (ng/ml) significantly decreased compared to control subjects. In age-matched subjects, obese PCOS had increased leptin level in ng/ml (median level with interquartile levels) of 45.67 (41.98–48.04) and decreased sOB-R in ng/ml 11.47 (7.59–16.44) compared to lean PCOS 16.97 (10.60–45.55) for leptin and 16.62 (11.61–17.96) for sOB-R with p values 0.013 and 0.042, respectively. However, body mass index (BMI) is significantly correlated with leptin and s-OBR, while no significant correlations with parameters of insulin resistance were detected. Conclusion. PCOS is associated with hyperleptinemia and increased free leptin index. Decreased sOB-R could be a compensatory mechanism for the defective action of leptin. PMID:26180527

Leptin as well as Free Leptin Receptor Is Associated with Polycystic Ovary Syndrome in Young Women

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Nasser M. Rizk

2015-01-01

Full Text Available Background and Aim. Leptin has two forms in the circulation: free and bound forms. The soluble leptin receptor (sOB-R circulates in the blood and can bind to leptin. The aim of this study is to assess the concentrations of the leptin and the sOB-R in PCOS and its relation to adiposity, insulin resistance, and androgens. Methods. A cross-sectional study included 78 female students aged 17–25 years. Fasting serum leptin and sOB-R concentrations were measured. The anthropometric variables and the hormonal profile such as insulin, female and male sex hormones, and prolactin were assessed. Results. In PCOS, leptin level (ng/ml and free leptin index (FLI increased significantly while sOB-R (ng/ml significantly decreased compared to control subjects. In age-matched subjects, obese PCOS had increased leptin level in ng/ml (median level with interquartile levels of 45.67 (41.98–48.04 and decreased sOB-R in ng/ml 11.47 (7.59–16.44 compared to lean PCOS 16.97 (10.60–45.55 for leptin and 16.62 (11.61–17.96 for sOB-R with p values 0.013 and 0.042, respectively. However, body mass index (BMI is significantly correlated with leptin and s-OBR, while no significant correlations with parameters of insulin resistance were detected. Conclusion. PCOS is associated with hyperleptinemia and increased free leptin index. Decreased sOB-R could be a compensatory mechanism for the defective action of leptin.

Production of metal and metal-ceramic coatings on D-Gun Ob

International Nuclear Information System (INIS)

Gavrilenko, T.P.; Nikolaev, Y.A.; Ulianitsky, V.Y.

1995-01-01

Optimization of the detonation spraying process has been made for the production of metal and metal-ceramics coatings with the D-Gun Ob. Owing to the ability of Ob to work with several fuels and an inert diluent simultaneously, variation of detonation regimes in a wide range is possible, and because of localized powder injection in the D-Gun barrel, high uniformity of parameters of powder particles is achieved. The best conditions for particle heating and acceleration were calculated with the help of mathematical simulation, and the corresponding regimes were realized on D-Gun Ob. High-quality aluminum, copper, nickel, and nickel-chromium-silicon-carbon-boron alloy coatings were produced by using only propane fuel. Chromium carbide with nickel and tungsten carbide with cobalt coatings were produced with addition of acetylene. Optimal efficiency and high bonding strength were achieved for all powders. Data on microhardness, bonding strength, and efficiency are presented

ObsPy: A Python Toolbox for Seismology - Recent Developments and Applications

Science.gov (United States)

Megies, T.; Krischer, L.; Barsch, R.; Sales de Andrade, E.; Beyreuther, M.

2014-12-01

ObsPy (http://www.obspy.org) is a community-driven, open-source project dedicated to building a bridge for seismology into the scientific Python ecosystem. It offersa) read and write support for essentially all commonly used waveform, station, and event metadata file formats with a unified interface,b) a comprehensive signal processing toolbox tuned to the needs of seismologists,c) integrated access to all large data centers, web services and databases, andd) convenient wrappers to legacy codes like libtau and evalresp.Python, currently the most popular language for teaching introductory computer science courses at top-ranked U.S. departments, is a full-blown programming language with the flexibility of an interactive scripting language. Its extensive standard library and large variety of freely available high quality scientific modules cover most needs in developing scientific processing workflows. Together with packages like NumPy, SciPy, Matplotlib, IPython, Pandas, lxml, and PyQt, ObsPy enables the construction of complete workflows in Python. These vary from reading locally stored data or requesting data from one or more different data centers through to signal analysis and data processing and on to visualizations in GUI and web applications, output of modified/derived data and the creation of publication-quality figures.ObsPy enjoys a large world-wide rate of adoption in the community. Applications successfully using it include time-dependent and rotational seismology, big data processing, event relocations, and synthetic studies about attenuation kernels and full-waveform inversions to name a few examples. All functionality is extensively documented and the ObsPy tutorial and gallery give a good impression of the wide range of possible use cases.We will present the basic features of ObsPy, new developments and applications, and a roadmap for the near future and discuss the sustainability of our open-source development model.

High rate of vaginal erosions associated with the mentor ObTape.

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Yamada, Brian S; Govier, Fred E; Stefanovic, Ksenija B; Kobashi, Kathleen C

2006-08-01

The transobturator tape method is a newer surgical technique for the treatment of stress urinary incontinence. Limited data exist related to complications with this approach or the types of mesh products used. We report our experience with vaginal erosions associated with the Mentor ObTape and American Medical Systems Monarc transobturator slings. Beginning in December 2003 selected female patients with anatomic urinary incontinence were prospectively followed after placement of the Mentor ObTape. Beginning in January 2004 we also began using the American Medical Systems Monarc in similar patients. Patients were admitted overnight after surgery, discharged on oral antibiotics, and seen in the clinic at 6 weeks postoperatively. A total of 67 patients have undergone placement of the Mentor ObTape and 9 of those patients (13.4%) have had vaginal extrusions of the sling. Eight patients reported a history of persistent vaginal discharge. One patient presented initially to an outside facility with a left thigh abscess tracking to the left inguinal incision site. Each patient was taken back to the operating room for mesh removal. A total of 56 patients have undergone placement of the AMS Monarc and none have had any vaginal erosions. Our high rate of vaginal extrusion using the ObTape has led us to discontinue the use of this product in our institution. Continued followup of all of these patients will be of critical importance.

Star formation in the Monoceros OB1 dark cloud

International Nuclear Information System (INIS)

Margulis, M.S.

1987-01-01

A survey of the Monoceros OB1 dark cloud was made for molecular outflows and young stellar objects. In all, nine molecular outflows and thirty far-infrared sources were identified in a portion of the cloud composed of about 3 x 10 4 M of material. Statistical arguments suggest that 90% of the far-infrared sources actually are young stellar objects embedded in the cloud. If the star formation rate in the Mon OB1 cloud is roughly constant with time, then molecular outflows in the cloud should be able to support it against collapse due to gravity. This suggests that the birthrate of outflows in the solar neighborhood is very high. In fact, regardless of considerations of cloud support, the large number of outflows identified in the Mon OB1 cloud and the propensity of the youngest stellar objects in the cloud to be associated with outflows suggest that outflows have a high birthrate in the solar neighborhood and are part of a common stage in early stellar evolution. The young stellar objects identified in the cloud can be fit into a spectral classification system. Also, the outflow phase in early stellar evolution tends to occur at about the time that young stellar objects lose a large fraction of their circumstellar envelopes

IPV Screening and Readiness to Respond to IPV in Ob-Gyn Settings: A Patient-Physician Study

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Katherine M. Jones

2018-01-01

Full Text Available Purpose. Intimate partner violence (IPV is a serious, preventable public health concern that largely affects women of reproductive age. Obstetrician-gynecologists (ob-gyns have a unique opportunity to identify and support women experiencing IPV to improve women’s health. Considering recent efforts to increase IPV awareness and intervention, the present study aimed to provide a current evaluation of nationally representative samples to assess ob-gyn readiness to respond to IPV as well as patient IPV-related experiences. Methods. 400 ob-gyns were randomly selected from American College of Obstetricians and Gynecologists’ (ACOG Collaborative Ambulatory Research Network. Each physician was mailed one physician survey and 25 patient surveys. Results. IPV training/education and IPV screening practices were associated with most measures of ob-gyn readiness to respond to IPV. Among respondents, 36.8% endorsed screening all patients at annual exams; however, 36.8% felt they did not have sufficient training to assist individuals in addressing IPV. Workplace encouragement of IPV response was associated with training, screening, detection, preparation/knowledge, response practices, and resources. Thirty-one percent of patients indicated their ob-gyn had asked about possible IPV experiences during their medical visit. Conclusion. Findings highlight specific gaps in ob-gyns’ IPV knowledge and response practices to be further addressed by IPV training.

Radionuclides in the Ob/Irtysh river system and their contribution to pollution of the Arctic

International Nuclear Information System (INIS)

Trapeznikov, A.; Pozolotina, V.; Trapeznikova, V.; Yushkov, P.; Polikarpov, G.; Aarkrog, A.; Nielsen, S.P.

1995-01-01

The aims of this study were: 1) to continue the investigation of distribution of radionuclides in the principal components of the Techa river, and 2) to get the first estimate of the contamination of sediments of the Iset, Tobol, Irtysh and Ob rivers. The samples from the Irtysh river were collected in 1993 nine km in front of confluence of the Irtysh with the Ob river. The mean Cs-137 concentration in the sediments did not show any clear trend. The sediments from the Ob river were collected in 1992 near Labitnangi, situated about 300 km from the outlet of the Ob into the Kara Sea. In 1994 samples were collected five km in front of and five km after confluence with the Irtysh river. All results are summarized in a table. It appears that the Cs-137 levels in the Ob sediments, before and after confluence with Irtysh, do not change significantly. It is difficult to see any systematic changes in Cs-137 concentrations with depth. In some cases the top five cm show higher concentrations than the deeper layers. 7 refs., 1 tab

ObsPy - A Python Toolbox for Seismology - and Applications

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Krischer, L.; Megies, T.; Barsch, R.; MacCarthy, J.; Lecocq, T.; Koymans, M. R.; Carothers, L.; Eulenfeld, T.; Reyes, C. G.; Falco, N.; Sales de Andrade, E.

2017-12-01

Recent years witnessed the evolution of Python's ecosystem into one of the most powerful and productive scientific environments across disciplines. ObsPy (https://www.obspy.org) is a fully community driven, open-source project dedicated to provide a bridge for seismology into that ecosystem. It is a Python toolbox offering: Read and write support for essentially every commonly used data format in seismology with a unified interface and automatic format detection. This includes waveform data (MiniSEED, SAC, SEG-Y, Reftek, …) as well as station (SEED, StationXML, SC3ML, …) and event meta information (QuakeML, ZMAP, …). Integrated access to the largest data centers, web services, and real-time data streams (FDSNWS, ArcLink, SeedLink, ...). A powerful signal processing toolbox tuned to the specific needs of seismologists. Utility functionality like travel time calculations with the TauP method, geodetic functions, and data visualizations. ObsPy has been in constant development for more than eight years and is developed and used by scientists around the world with successful applications in all branches of seismology. Additionally it nowadays serves as the foundation for a large number of more specialized packages. Newest features include: Full interoperability of SEED and StationXML/Inventory objects Access to the Nominal Response Library (NRL) for easy and quick creation of station metadata from scratch Support for the IRIS Federated Catalog Service Improved performance of the EarthWorm client Several improvements to MiniSEED read/write module Improved plotting capabilities for PPSD (spectrograms, PSD of discrete frequencies over time, ..) Support for.. Reading ArcLink Inventory XML Reading Reftek data format Writing SeisComp3 ML (SC3ML) Writing StationTXT format This presentation will give a short overview of the capabilities of ObsPy and point out several representative or new use cases and show-case some projects that are based on ObsPy, e.g.: seismo

Photoionization of the diffuse interstellar medium and galactic halo by OB associtations

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Dove, James B.; Shull, J. Michael

1994-01-01

Assuming smoothly varying H I distributions in te Galactic disk, we have calculated the geometry of diffuse II regions due to OB associations in the Galactic plane. Near the solar circle, OB associations with a Lyman continuum (Lyc) photon luminosity Psi(sub Lyc) = 3.3 x 10(exp 7) cm(exp -2) s(exp -1), produce H II regions that are density bounded in the vertical direction (H II chimneys) allowing Lyc to escape the gaseous disk and penetrate into the Galactic halo. We provide analytic formulae for the Lyc escape fraction as functions of S(sub 0) O-star catalog of Garmany and a new Lyc stellar stellar Lyc stellar flux calibration, we find a production rate of Lyc photons by OB associations within 2.5 kpc of Psi(sub Lyc) = 3.3 x 10(exp 7) cm(exp -2) s(exp -1). Integrating the fraction of Lyc photons that escape the disk over our adopted luminosity function of OB associations, we estimate that approximately 7% of the ionizing photons, or Phi(sub Lyc) = 2.3 x 10(exp 6) cm(exp -2) s(exp -1), escape each side of the H I disk layer and penetrate the diffuse ionized medium ('Reynolds layer'). This flux is sufficient to explain the potoionization of this, although we have not constructed a model for the observed H-alpha emission and pulsar dispersion measures that is fully consistent with the absorption rate of Lyc in the H II layer. Since our quiescent model does not account for the effects of dynamic chimneys and superbubbles, which should enhance Lyc escape, we conclude the O stars are the probable source of ionizing radiation for the Reynolds layer. For a random distribution of OB associations throughout the disk, the Lyc flux is nearly uniform for heights Z is greater than approximately 0.8 kpc above the midplane.

ObsPy: A Python toolbox for seismology - Sustainability, New Features, and Applications

Science.gov (United States)

Krischer, L.; Megies, T.; Sales de Andrade, E.; Barsch, R.; MacCarthy, J.

2016-12-01

ObsPy (https://www.obspy.org) is a community-driven, open-source project dedicated to offer a bridge for seismology into the scientific Python ecosystem. Amongst other things, it provides Read and write support for essentially every commonly used data format in seismology with a unified interface. This includes waveform data as well as station and event meta information. A signal processing toolbox tuned to the specific needs of seismologists. Integrated access to the largest data centers, web services, and databases. Wrappers around third party codes like libmseed and evalresp. Using ObsPy enables users to take advantage of the vast scientific ecosystem that has developed around Python. In contrast to many other programming languages and tools, Python is simple enough to enable an exploratory and interactive coding style desired by many scientists. At the same time it is a full-fledged programming language usable by software engineers to build complex and large programs. This combination makes it very suitable for use in seismology where research code often must be translated to stable and production ready environments, especially in the age of big data. ObsPy has seen constant development for more than six years and enjoys a large rate of adoption in the seismological community with thousands of users. Successful applications include time-dependent and rotational seismology, big data processing, event relocations, and synthetic studies about attenuation kernels and full-waveform inversions to name a few examples. Additionally it sparked the development of several more specialized packages slowly building a modern seismological ecosystem around it. We will present a short overview of the capabilities of ObsPy and point out several representative use cases and more specialized software built around ObsPy. Additionally we will discuss new and upcoming features, as well as the sustainability of open-source scientific software.

Effects of body fat on the associations of high-molecular-weight adiponectin, leptin and soluble leptin receptor with metabolic syndrome in Chinese.

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Danxia Yu

Full Text Available BACKGROUND: Little is known regarding the associations between high-molecular-weight (HMW- adiponectin, leptin and soluble leptin receptor (sOB-R and metabolic syndrome (MetS in Chinese. Also few studies elucidate the effects of inflammation and body fat mass on the relations. METHODS: Plasma HMW-adiponectin, leptin and sOB-R were measured among 1055 Chinese men and women (35∼54 yrs. Whole body and trunk fat mass were determined by Dual-energy X-ray absorptiometry. MetS was defined by the updated NCEP/ATPIII criterion for Asian-Americans. RESULTS: HMW-adiponectin was inversely associated with MetS in multivariate model including fat mass index (FMI, inflammatory markers, leptin and sOB-R (OR in the highest quartile= 0.30, 95%CI 0.18∼0.50, P<.0001. Plasma sOB-R was also inversely associated with MetS independent of body fatness and inflammatory markers, whereas the association was somewhat attenuated after adjusting HMW-adiponectin (OR for the highest quartile = 0.78, 95%CI 0.47∼1.32, P = 0.15. In contrast, leptin was associated with increased odds of MetS independent of inflammatory markers, HMW-adiponectin, and sOB-R (OR for the highest quartile= 2.64, 95%CI 1.35∼5.18, P = 0.006, although further adjustment for FMI abolished this association. CONCLUSIONS: HMW-adiponectin exhibited strong inverse associations with MetS independent of body composition, inflammation, leptin and sOB-R; while the associations of leptin and sOB-R were largely explained by fat mass or HMW-adiponectin, respectively.

Determining OBS Instrument Orientations: A Comparison of Algorithms

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Doran, A. K.; Laske, G.

2015-12-01

The alignment of the orientation of the horizontal seismometer components with the geographical coordinate system is critical for a wide variety of seismic analyses, but the traditional deployment method of ocean bottom seismometers (OBS) precludes knowledge of this parameter. Current techniques for determining the orientation predominantly rely on body and surface wave data recorded from teleseismic events with sufficiently large magnitudes. Both wave types experience lateral refraction between the source and receiver as a result of heterogeneity and anisotropy, and therefore the arrival angle of any one phase can significantly deviate from the great circle minor arc. We systematically compare the results and uncertainties obtained through current determination methods, as well as describe a new algorithm that uses body wave, surface wave, and differential pressure gauge data (where available) to invert for horizontal orientation. To start with, our method is based on the easily transportable computer code of Stachnik et al. (2012) that is publicly available through IRIS. A major addition is that we utilize updated global dispersion maps to account for lateral refraction, as was done by Laske (1995). We also make measurements in a wide range of frequencies, and analyze surface wave trains of repeat orbits. Our method has the advantage of requiring fewer total events to achieve high precision estimates, which is beneficial for OBS deployments that can be as short as weeks. Although the program is designed for the purpose of use with OBS instruments, it also works with standard land installations. We intend to provide the community with a program that is easy to use, requires minimal user input, and is optimized to work with data cataloged at the IRIS DMC.

OBS Data Denoising Based on Compressed Sensing Using Fast Discrete Curvelet Transform

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Nan, F.; Xu, Y.

2017-12-01

OBS (Ocean Bottom Seismometer) data denoising is an important step of OBS data processing and inversion. It is necessary to get clearer seismic phases for further velocity structure analysis. Traditional methods for OBS data denoising include band-pass filter, Wiener filter and deconvolution etc. (Liu, 2015). Most of these filtering methods are based on Fourier Transform (FT). Recently, the multi-scale transform methods such as wavelet transform (WT) and Curvelet transform (CvT) are widely used for data denoising in various applications. The FT, WT and CvT could represent signal sparsely and separate noise in transform domain. They could be used in different cases. Compared with Curvelet transform, the FT has Gibbs phenomenon and it cannot handle points discontinuities well. WT is well localized and multi scale, but it has poor orientation selectivity and could not handle curves discontinuities well. CvT is a multiscale directional transform that could represent curves with only a small number of coefficients. It provide an optimal sparse representation of objects with singularities along smooth curves, which is suitable for seismic data processing. As we know, different seismic phases in OBS data are showed as discontinuous curves in time domain. Hence, we promote to analysis the OBS data via CvT and separate the noise in CvT domain. In this paper, our sparsity-promoting inversion approach is restrained by L1 condition and we solve this L1 problem by using modified iteration thresholding. Results show that the proposed method could suppress the noise well and give sparse results in Curvelet domain. Figure 1 compares the Curvelet denoising method with Wavelet method on the same iterations and threshold through synthetic example. a)Original data. b) Add-noise data. c) Denoised data using CvT. d) Denoised data using WT. The CvT can well eliminate the noise and has better result than WT. Further we applied the CvT denoise method for the OBS data processing. Figure 2a

Decreased triiodothyronine receptor binding in skeletal muscle nuclei and erythrocyte membranes of obese (ob/ob) mice

International Nuclear Information System (INIS)

Gilvary, E.P.

1988-01-01

Hindlimb skeletal muscle weights and binding of L-tri-iodothyronine (T 3 ) to isolated nuclei of this tissue were investigated in obese (ob/ob) mice and their lean littermates. Maximal binding capacities (Bmax) and dissociation constants (Kd) were determined by incubating isolated muscle nuclei with increasing conc. of 125 I-T 3 (0.4 nM to 4nM). At 12 wks. of age, although weighing substantially more, obese mice had only 55% as much muscle mass as their lean littermates. There was no phenotype effect observed for Kd, however, Bmax was significantly less for the obese mice. In a second experiment, a 16-wk. feeding study was conducted with 4 groups of mice according to the following design: lean mice fed rodent chow; obese mice fed rodent chow; obese mice, n-6 fatty acid (FA)-rich diet; and obese mice, n-3FA-rich diet. Erythrocyte T 3 receptor binding capacities were measured by incubating red cell ghosts from mice of these 4 groups with 125 I-T 3 . As with skeletal muscle nuclei there were no phenotype effects observed for Kd between any two groups. In contrasts obese mice fed chow and n-6FA-rich diets both exhibited lower Bmax than their lean counterparts, while no significant difference was observed between the latter group and the obese mice fed an n-3FA-rich diet. Bmax values of the n-6 group were also decreased compared to the n-3 group

Association of plutonium with sediments from the Ob and Yenisey Rivers and Estuaries

International Nuclear Information System (INIS)

Skipperud, Lindis; Brown, Justin; Fifield, L. Keith; Oughton, Deborah H.; Salbu, Brit

2009-01-01

The present study applied sequential extraction techniques to investigate the binding and mobility of plutonium (Pu) in sediments from the rivers and estuaries of the Ob and Yenisey. As a study site, the Ob and Yenisey are particularly interesting as both rivers have weapons-grade Pu sources in their catchment areas, including the Russian Pu production and reprocessing plants at Mayak, Tomsk-7 and Krashnoyarsk, and the Semipalantinsk nuclear weapons testing site in Kazakhstan. Plutonium activity and 240 Pu/ 239 Pu ratios were determined using accelerator mass spectrometry (AMS). Sequential extractions showed that between 47 and 80% of the Pu in Yenisey River sediments and 35-53% of the Pu in soils around the Techa River are mobilized with weak oxidising agents, which can indicate that Pu is bound to organic material. In contrast, Pu in Ob and Yenisey Estuarine sediments was more strongly bound, with 60-100% being found in the HNO 3 -extractable fraction. This change in speciation could reflect either that Pu bound to organic material in the Techa and Yenisey River sediments becomes more fixed to the sediments with time, or that organic-bound Pu is mobilized and released to the water when the sediments encounter the more saline water of the Ob and Yenisey estuaries. In general, 240 Pu/ 239 Pu ratios were relatively consistent between different extraction fractions, although, in whole sediments, an increase in ratio was observed with distance from the source. This reflects the increased influence of weapon fallout from catchment runoff within the river systems, as compared to the weapons-grade sources close to the production and reprocessing plants. Knowledge of Pu speciation in the Ob and Yenisey Rivers, and the processes controlling its behaviour in estuarine systems, can improve predictions of its transfer and subsequent environmental impact to Arctic Seas

A Novel Congestion Detection Scheme in TCP Over OBS Networks

KAUST Repository

Shihada, Basem; Ho, Pin-Han; Zhang, Qiong

2009-01-01

This paper introduces a novel congestion detection scheme for high-bandwidth TCP flows over optical burst switching (OBS) networks, called statistical additive increase multiplicative decrease (SAIMD). SAIMD maintains and analyzes a number

ESTIMATION OF BURSTS LENGTH AND DESIGN OF A FIBER DELAY LINE BASED OBS ROUTER

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RICHA AWASTHI

2017-03-01

Full Text Available The demand for higher bandwidth is increasing day by day and this ever growing demand cannot be catered to with current electronic technology. Thus new communication technology like optical communication needs to be used. In the similar context OBS (optical burst switching is considered as next generation data transfer technology. In OBS information is transmitted in forms of optical bursts of variable lengths. However, contention among the bursts is a major problem in OBS system, and for contention resolution defection routing is mostly preferred. However, deflection routing increases delay. In this paper, it is shown that the arrival of very large bursts is rare event, and for moderate burst length the buffering of contending burst can provide very effective solution. However, in case of arrival of large bursts deflection can be used.

ObsPy – What can it do for data centers and observatories?

Directory of Open Access Journals (Sweden)

Joachim Wassermann

2011-04-01

Full Text Available Data acquisition by seismic centers relies on real-time systems, like SeisComP3, Antelope and Earthworm. However, these are complex systems that are designed for fast and precisely defined standard real-time analyses. Therefore, it is not a simple task to access or modify internal routines, and to integrate them into custom-processing workflows or to perform in-depth data analyses. Often a library is necessary that provides convenient access to data and allows easy control over all of the operations that are to be performed on the data. ObsPy is such a library, which is designed to access and process seismological waveform data and metadata. We use short and simple examples here to demonstrate how effective it is to use Python for seismological data analysis. Then, we illustrate the general capabilities of ObsPy, and highlight some of its specific aspects that are relevant for seismological data centers and observatories, through presentation of real-world examples. Finally, we demonstrate how the ObsPy library can be used to develop custom graphical user interface applications.

Structure-function analysis of the OB and latch domains of chlorella virus DNA ligase.

Science.gov (United States)

Samai, Poulami; Shuman, Stewart

2011-06-24

Chlorella virus DNA ligase (ChVLig) is a minimized eukaryal ATP-dependent DNA sealing enzyme with an intrinsic nick-sensing function. ChVLig consists of three structural domains, nucleotidyltransferase (NTase), OB-fold, and latch, that envelop the nicked DNA as a C-shaped protein clamp. The OB domain engages the DNA minor groove on the face of the duplex behind the nick, and it makes contacts to amino acids in the NTase domain surrounding the ligase active site. The latch module occupies the DNA major groove flanking the nick. Residues at the tip of the latch contact the NTase domain to close the ligase clamp. Here we performed a structure-guided mutational analysis of the OB and latch domains. Alanine scanning defined seven individual amino acids as essential in vivo (Lys-274, Arg-285, Phe-286, and Val-288 in the OB domain; Asn-214, Phe-215, and Tyr-217 in the latch), after which structure-activity relations were clarified by conservative substitutions. Biochemical tests of the composite nick sealing reaction and of each of the three chemical steps of the ligation pathway highlighted the importance of Arg-285 and Phe-286 in the catalysis of the DNA adenylylation and phosphodiester synthesis reactions. Phe-286 interacts with the nick 5'-phosphate nucleotide and the 3'-OH base pair and distorts the DNA helical conformation at the nick. Arg-285 is a key component of the OB-NTase interface, where it forms a salt bridge to the essential Asp-29 side chain, which is imputed to coordinate divalent metal catalysts during the nick sealing steps.

Structure-Function Analysis of the OB and Latch Domains of Chlorella Virus DNA Ligase*

Science.gov (United States)

Samai, Poulami; Shuman, Stewart

2011-01-01

Chlorella virus DNA ligase (ChVLig) is a minimized eukaryal ATP-dependent DNA sealing enzyme with an intrinsic nick-sensing function. ChVLig consists of three structural domains, nucleotidyltransferase (NTase), OB-fold, and latch, that envelop the nicked DNA as a C-shaped protein clamp. The OB domain engages the DNA minor groove on the face of the duplex behind the nick, and it makes contacts to amino acids in the NTase domain surrounding the ligase active site. The latch module occupies the DNA major groove flanking the nick. Residues at the tip of the latch contact the NTase domain to close the ligase clamp. Here we performed a structure-guided mutational analysis of the OB and latch domains. Alanine scanning defined seven individual amino acids as essential in vivo (Lys-274, Arg-285, Phe-286, and Val-288 in the OB domain; Asn-214, Phe-215, and Tyr-217 in the latch), after which structure-activity relations were clarified by conservative substitutions. Biochemical tests of the composite nick sealing reaction and of each of the three chemical steps of the ligation pathway highlighted the importance of Arg-285 and Phe-286 in the catalysis of the DNA adenylylation and phosphodiester synthesis reactions. Phe-286 interacts with the nick 5′-phosphate nucleotide and the 3′-OH base pair and distorts the DNA helical conformation at the nick. Arg-285 is a key component of the OB-NTase interface, where it forms a salt bridge to the essential Asp-29 side chain, which is imputed to coordinate divalent metal catalysts during the nick sealing steps. PMID:21527793

Transcriptional activation of the mouse obese (ob) gene by CCAAT/enhancer binding protein alpha

DEFF Research Database (Denmark)

Hwang, C S; Mandrup, S; MacDougald, O A

1996-01-01

Like other adipocyte genes that are transcriptionally activated by CCAAT/enhancer binding protein alpha (C/EBP alpha) during preadipocyte differentiation, expression of the mouse obese (ob) gene is immediately preceded by the expression of C/EBP alpha. While the 5' flanking region of the mouse ob...... gene contains several consensus C/EBP binding sites, only one of these sites appears to be functional. DNase I cleavage inhibition patterns (footprinting) of the ob gene promoter revealed that recombinant C/EBP alpha, as well as a nuclear factor present in fully differentiated 3T3-L1 adipocytes...... to a consensus C/EBP binding site at nucleotides -55 to -47 generated a specific protein-oligonucleotide complex that was supershifted by antibody against C/EBP alpha. Probes corresponding to two upstream consensus C/EBP binding sites failed to generate protein-oligonucleotide complexes. Cotransfection of a C...

Inter-Division IV/V WG on Active OB Stars

NARCIS (Netherlands)

Owocki, S.; Aerts, C.; Fabregat, J.; Gies, D.; Henrichs, H.F.; McDavid, D.; Porter, J.; Rivinius, T.; Peters, G.; Stefl, S.

2007-01-01

Our group studies active early-type (OB) stars, with historical focus on classical Be stars, but extending in recent years to include Slowly Pulsating B-stars (SPB), Beta-Cephei stars, the strongly magnetic Bp stars, Luminous Blue Vairiable (LBV) stars, and B[e] stars. An overall goal is to

Expression of Leptin (Ob Gene Product) in Reproductive System ...

African Journals Online (AJOL)

Purpose: To determine serum leptin and its ob mRNA expression both in the PCOS and non-PCOS ovary, endometrium and adipose tissue in normal or polycystic ovary syndrome (PCOS) in South Indian population. PCOS (Polycystic Ovary Syndrome) and non-PCOS subject's endometrium, ovary and adipose tissue were ...

Radio observations of the CMa OB1 H II regions

International Nuclear Information System (INIS)

Gaylard, M.J.; Kemball, A.J.

1984-01-01

A sensitive 10 0 x 15 0 13-cm map made of the CMa OB1 H II regions' radio emission shows a strong similarity to Hα emission photographs. Sharpless 296 is shown to consist of a prominent central and western arc completed by a weaker southern loop, and with a faint northern bar. The emission is thermal, superimposed over a predominantly non-thermal background. The H142α recombination line has been detected at eight positions in S296, and in S292 and S297. The average electron temperature in S296 is 6900 +- 1300 K. The UV fluxes from the CMa OB1 stars account for the observed emission measures of the H II regions. The H142α 1sr velocities indicate that the ionized material is in contact with the molecular clouds. (author)

Magnetic field of massive chemically peculiar stars in the Orion OB1 association

Science.gov (United States)

Romanyuk, I. I.; Semenko, E. A.; Kudryavtsev, D. O.; Yakunin, I. A.

2018-01-01

Spectropolarimetric observations of 55 chemically peculiar stars in the Orion OB1 association were obtained at the 6 m telescope of the Russian Academy of Sciences with the aim of searching for the presence of stellar magnetic fields. We found 8 new magnetic stars in addition to 20 previously known objects. The frequency of chemically peculiar A and B-type stars among normal A and B-type stars and the frequency of magnetic stars among all chemically peculiar stars decreases with age in the Orion OB1 association.

A model for the infrared emission from an OB star cluster environment

International Nuclear Information System (INIS)

Leisawitz, D.

1990-01-01

Researchers developed an interactive radiative transfer code that predicts the infrared emission from an HII region containing diffuse ionized and atomic gas and dense molecular clouds. This model complements the investigation of the redistribution of OB star luminosity in the interstellar medium (Leisawitz and Hauser 1988, Ap. J., 332, 954). The model can be used as a diagnostic tool to probe the radiation field and matter density in an HII region, place constraints on the proximity and orientation of an illuminated molecular cloud with respect to the ionizing stars, test for the presence of small, transiently heated dust grains, and determine whether the dust-to-gas ratio is normal. Predictions of the model agree qualitatively and quantitatively with observations of blister-type HII regions ionized by well-studied OB clusters in which the distribution of dense neutral material is known. This is illustrated by a model for Infrared Astronomy Satellite (IRAS) observations of the region around NGC 7380 (S142). Researchers plan to use the model in a survey of regions of massive star formation in the outer Galaxy to study OB stars embedded to various degrees in their parental molecular clouds

Adipose cell differentiation: evidence for a two-step process in the polyamine-dependent Ob1754 clonal line.

Science.gov (United States)

Amri, E Z; Dani, C; Doglio, A; Etienne, J; Grimaldi, P; Ailhaud, G

1986-01-01

A subclone of preadipocyte Ob17 cells has been isolated (Ob1754 clonal line). Confluent Ob1754 cells treated with an inhibitor of spermidine and spermine synthesis, methylglyoxal bis(guanylhydrazone), were totally dependent upon putrescine addition for the expression of glycerol-3-phosphate dehydrogenase which behaved as a late marker of adipose conversion. Under these conditions, the early expression of lipoprotein lipase during growth arrest remained unchanged. Studies at the mRNA level showed that the expression of unidentified pOb24 and pGH3 mRNAs, which was parallel to that of lipoprotein lipase, is independent of polyamine addition whereas the late emergence of glycerol-3-phosphate dehydrogenase mRNA was putrescine-dependent and co-ordinated with the expression of pAL422 mRNA encoding for a myelin-P2 homologue [Bernlohr, Angus, Lane, Bolanowski & Kelly (1984) Proc. Natl. Acad. Sci. U.S.A. 81, 5468-5472]. The appearance of lipoprotein lipase preceded DNA synthesis and post-confluent mitoses which were both putrescine-dependent and which took place before the appearance of glycerol-3-phosphate dehydrogenase. Thus the adipose conversion of Ob1754 cells involves the expression of at least two separate sets of markers which are differently regulated. Images Fig. 3. Fig. 6. PMID:3800927

Increasing the number and signal-to-noise ratio of OBS traces with supervirtual refraction interferometry and free-surface multiples

KAUST Repository

Bharadwaj, P.; Wang, X.; Schuster, Gerard T.; McIntosh, K.

2013-01-01

The theory of supervirtual interferometry is modified so that free-surface related multiple refractions can be used to enhance the signal-to-noise ratio (SNR) of primary refraction events by a factor proportional to√Ns, where Ns is the number of post-critical sources for a specified refraction multiple. We also show that refraction multiples can be transformed into primary refraction events recorded at virtual hydrophones located between the actual hydrophones. Thus, data recorded by a coarse sampling of ocean bottom seismic (OBS) stations can be transformed, in principle, into a virtual survey with P times more OBS stations, where P is the order of the visible free-surface related multiple refractions. The key assumption is that the refraction arrivals are those of head waves, not pure diving waves. The effectiveness of this method is validated with both synthetic OBS data and an OBS data set recorded offshore from Taiwan. Results show the successful reconstruction of far-offset traces out to a source-receiver offset of 120 km. The primary supervirtual traces increase the number of pickable first arrivals from approximately 1600 to more than 3100 for a subset of the OBS data set where the source is only on one side of the recording stations. In addition, the head waves associated with the first-order free-surface refraction multiples allow for the creation of six new common receiver gathers recorded at virtual OBS station located about half way between the actual OBS stations. This doubles the number of OBS stations compared to the original survey and increases the total number of pickable traces from approximately 1600 to more than 6200. In summary, our results with the OBS data demonstrate that refraction interferometry can sometimes more than quadruple the number of usable traces, increase the source-receiver offsets, fill in the receiver line with a denser distribution of OBS stations, and provide more reliable picking of first arrivals. Apotential liability

Increasing the number and signal-to-noise ratio of OBS traces with supervirtual refraction interferometry and free-surface multiples

KAUST Repository

Bharadwaj, P.

2013-01-10

The theory of supervirtual interferometry is modified so that free-surface related multiple refractions can be used to enhance the signal-to-noise ratio (SNR) of primary refraction events by a factor proportional to√Ns, where Ns is the number of post-critical sources for a specified refraction multiple. We also show that refraction multiples can be transformed into primary refraction events recorded at virtual hydrophones located between the actual hydrophones. Thus, data recorded by a coarse sampling of ocean bottom seismic (OBS) stations can be transformed, in principle, into a virtual survey with P times more OBS stations, where P is the order of the visible free-surface related multiple refractions. The key assumption is that the refraction arrivals are those of head waves, not pure diving waves. The effectiveness of this method is validated with both synthetic OBS data and an OBS data set recorded offshore from Taiwan. Results show the successful reconstruction of far-offset traces out to a source-receiver offset of 120 km. The primary supervirtual traces increase the number of pickable first arrivals from approximately 1600 to more than 3100 for a subset of the OBS data set where the source is only on one side of the recording stations. In addition, the head waves associated with the first-order free-surface refraction multiples allow for the creation of six new common receiver gathers recorded at virtual OBS station located about half way between the actual OBS stations. This doubles the number of OBS stations compared to the original survey and increases the total number of pickable traces from approximately 1600 to more than 6200. In summary, our results with the OBS data demonstrate that refraction interferometry can sometimes more than quadruple the number of usable traces, increase the source-receiver offsets, fill in the receiver line with a denser distribution of OBS stations, and provide more reliable picking of first arrivals. Apotential liability

Attenuation of S-waves in the lithosphere of the Sea of Crete according to OBS observations

Science.gov (United States)

Kovachev, S. A.; Kuzin, I. P.; Shoda, O. Yu.; Soloviev, S. L.

1991-11-01

Five OBS were installed in the Sea of Crete in 1987. During a period of nine days 430 local earthquakes were recorded. Hypocentres were determined for 85 microearthquakes. A correlation between magnitude ML and duration of seismic events on the records of the ocean bottom seismographs (OBS) was found from data of 14 shocks recorded simultaneously by OBS and some land-based Greek stations. A magnitude-frequency relationship for earthquakes recorded by OBS was obtained in the magnitude range ML = 2-4. Amplitude curves describing the attenuation of body waves in the lithosphere of the Sea of Crete were compiled. Assessment of quality factor Qs was made by comparison of empirical and theoretical amplitude curves. The values of Qs for the lithosphere of the Sea of Crete were calculated and found equal to 200-300. Low values of Qs and consequently strong attenuation of S-waves in the lithosphere of the Sea of Crete could be explained by extension of the lithosphere accompanied by its partial contamination with melted magma.

Low Leptin Availability as a Risk Factor for Dementia in Chilean Older People

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Cecilia Albala

2016-07-01

Full Text Available Objective: The aim was to study the role of leptin in the development of dementia. Methods: Follow-up of the ALEXANDROS cohorts, with baseline measurements in 2000. From 1,136 available subjects free of dementia at baseline, 667 subjects had frozen baseline blood samples for measuring leptin and soluble leptin receptor (sOB-R. The free leptin index (FLI was calculated as the ratio of leptin to sOB-R. Dementia was defined as an MMSE score 5 in the Pfeffer Activities Questionnaire. Results: After 15 years of follow-up, 42 incident cases of dementia were identified. No difference in serum leptin was observed between people with and without dementia, but sOB-R was higher in demented than in nondemented subjects (sOB-R: 44.94 ± 23.97 vs. 33.73 ± 21.13 ng/ml. The adjusted risk for dementia increased, the higher the log sOB (hazard ratio = 3.58; 95% CI 1.72-7.45, p = 0.001. Conclusion: Lower availability of free leptin was found in demented than in nondemented people, suggesting a role of leptin in cognition.

Diacylglycerol production induced by growth hormone in Ob1771 preadipocytes arises from phosphatidylcholine breakdown

International Nuclear Information System (INIS)

Catalioto, R.M.; Ailhaud, G.; Negrel, R.

1990-01-01

Growth Hormone has recently been shown to stimulate the formation of diacylglycerol in Ob1771 mouse preadipocyte cells without increasing inositol lipid turnover. Addition of growth hormone to Ob1771 cells prelabelled with [ 3 H]glycerol or [ 3 H]choline led to a rapid, transient and stoechiometric formation of labelled diacylglycerol and phosphocholine, respectively. In contrast, no change was observed in the level of choline and phosphatidic acid whereas the release of water-soluble metabolites in [ 3 H]ethanolamine prelabelled cells exposed to growth hormone was hardly detectable. Stimulation by growth hormone of cells prelabelled with (2-palmitoyl 9, 10 [ 3 H])phosphatidylcholine also induced the production of labelled diacyglycerol. Pertussis toxin abolished both diacylglycerol and phosphocholine formation induced by growth hormone. It is concluded that growth hormone mediates diacylglycerol production in Ob1771 cells by means of phosphatidylcholine breakdown involving a phospholipase C which is likely coupled to the growth hormone receptor via a pertussis toxin-sensitive G-protein

Diacylglycerol production induced by growth hormone in Ob1771 preadipocytes arises from phosphatidylcholine breakdown

Energy Technology Data Exchange (ETDEWEB)

Catalioto, R.M.; Ailhaud, G.; Negrel, R. (Universite de Nice-Sophia Antipolis (France))

1990-12-31

Growth Hormone has recently been shown to stimulate the formation of diacylglycerol in Ob1771 mouse preadipocyte cells without increasing inositol lipid turnover. Addition of growth hormone to Ob1771 cells prelabelled with ({sup 3}H)glycerol or ({sup 3}H)choline led to a rapid, transient and stoechiometric formation of labelled diacylglycerol and phosphocholine, respectively. In contrast, no change was observed in the level of choline and phosphatidic acid whereas the release of water-soluble metabolites in ({sup 3}H)ethanolamine prelabelled cells exposed to growth hormone was hardly detectable. Stimulation by growth hormone of cells prelabelled with (2-palmitoyl 9, 10 ({sup 3}H))phosphatidylcholine also induced the production of labelled diacyglycerol. Pertussis toxin abolished both diacylglycerol and phosphocholine formation induced by growth hormone. It is concluded that growth hormone mediates diacylglycerol production in Ob1771 cells by means of phosphatidylcholine breakdown involving a phospholipase C which is likely coupled to the growth hormone receptor via a pertussis toxin-sensitive G-protein.

Bioinformatics analysis identify novel OB fold protein coding genes in C. elegans.

Directory of Open Access Journals (Sweden)

Daryanaz Dargahi

Full Text Available BACKGROUND: The C. elegans genome has been extensively annotated by the WormBase consortium that uses state of the art bioinformatics pipelines, functional genomics and manual curation approaches. As a result, the identification of novel genes in silico in this model organism is becoming more challenging requiring new approaches. The Oligonucleotide-oligosaccharide binding (OB fold is a highly divergent protein family, in which protein sequences, in spite of having the same fold, share very little sequence identity (5-25%. Therefore, evidence from sequence-based annotation may not be sufficient to identify all the members of this family. In C. elegans, the number of OB-fold proteins reported is remarkably low (n=46 compared to other evolutionary-related eukaryotes, such as yeast S. cerevisiae (n=344 or fruit fly D. melanogaster (n=84. Gene loss during evolution or differences in the level of annotation for this protein family, may explain these discrepancies. METHODOLOGY/PRINCIPAL FINDINGS: This study examines the possibility that novel OB-fold coding genes exist in the worm. We developed a bioinformatics approach that uses the most sensitive sequence-sequence, sequence-profile and profile-profile similarity search methods followed by 3D-structure prediction as a filtering step to eliminate false positive candidate sequences. We have predicted 18 coding genes containing the OB-fold that have remarkably partially been characterized in C. elegans. CONCLUSIONS/SIGNIFICANCE: This study raises the possibility that the annotation of highly divergent protein fold families can be improved in C. elegans. Similar strategies could be implemented for large scale analysis by the WormBase consortium when novel versions of the genome sequence of C. elegans, or other evolutionary related species are being released. This approach is of general interest to the scientific community since it can be used to annotate any genome.

Further RIOTS4 Characterization of Field OB Stars in the SMC

Science.gov (United States)

Oey, M. S.; Barnes, Jesse R.; Paggeot, Kevin J.; Dorigo Jones, John; Castro, Norberto; Simon-Diaz, Sergio; Kratter, Kaitlin M.; Moe, Maxwell; Szymanski, Michal

2018-06-01

We present recent results from the Runaways and O-Type Star Spectroscopic Survey of the SMC (RIOTS4), a survey quantifying properties of the field OB stars in the Small Magellanic Cloud (SMC). Based on PSF-fitting photometry and astrometry of OGLE-III I-band images, we quantify the degree of isolation for the target OB stars, classifying them as "tip-of-the-iceberg" stars accompanied by small, sparse, clusters; or as true, isolated field stars. Many of these field stars must be runaways, which we evaluate using GAIA DR2 proper motions. We measure v sin i using the IACOB code Fourier analysis, finding that the bimodal distribution of projected rotation velocities is less pronounced for O stars than early B stars. We examine rotation in relation to relative isolation and runaway status.

VizieR Online Data Catalog: Properties of OB associations in IC 1613 (Garcia+, 2010)

Science.gov (United States)

Garcia, M.; Herrero, A.; Castro, N.; Corral, L.; Rosenberg, A.

2014-06-01

To understand the structure and evolution of massive stars, systematic surveys of the Local Group galaxies have been undertaken, to find these objects in environments of different chemical abundances. We focus on the metal-poor irregular galaxy IC 1613 to analyze the stellar and wind structure of its low-metallicity massive stars. We ultimately aim to study the metallicity-dependent driving mechanism of the winds of blue massive stars and use metal-poor massive stars of the Local Volume as a proxy for the stars in the early Universe. In a previous paper we produced a list of OB associations in IC 1613. Their properties are not only a powerful aid towards finding the most interesting candidate massive stars, but also reveal the structure and recent star formation history of the galaxy. We characterize these OB associations and study their connection with the galactic global properties. The reddening-free Q parameter is a powerful tool in the photometric analysis of young populations of massive stars, since it exhibits a smaller degree of degeneracy with OB spectral types than the B-V color. The color-magnitude diagram (Q vs. V) of the OB associations in IC 1613 is studied to determine their age and mass, and confirm the population of young massive stars. We identified more than 10 stars with M>=50M⊙. Spectral classification available for some of them confirm their massive nature, yet we find the common discrepancy with the spectroscopically derived masses. There is a general increasing trend of the mass of the most massive member with the number of members of each association, but not with the stellar density. The average diameter of the associations of this catalog is 40pc, half the historically considered typical size of OB associations. Size increases with the association population. The distribution of the groups strongly correlates with that of neutral and ionized hydrogen. We find the largest dispersion of association ages in the bubble region of the galaxy

Multifunctional Bi2ZnOB2O6 single crystals for second and third order nonlinear optical applications

International Nuclear Information System (INIS)

Iliopoulos, K.; Kasprowicz, D.; Majchrowski, A.; Michalski, E.; Gindre, D.; Sahraoui, B.

2013-01-01

Bi 2 ZnOB 2 O 6 nonlinear optical single crystals were grown by means of the Kyropoulos method from stoichiometric melt. The second and third harmonic generation (SHG/THG) of Bi 2 ZnOB 2 O 6 crystals were investigated by the SHG/THG Maker fringes technique. Moreover, SHG microscopy studies were carried out providing two-dimensional SHG images as a function of the incident laser polarization. The high nonlinear optical efficiency combined with the possibility to grow high quality crystals make Bi 2 ZnOB 2 O 6 an excellent candidate for photonic applications

VizieR Online Data Catalog: Velocity and proper motion of OB associations (Melnik+, 2009)

Science.gov (United States)

Melnik, A. M.; Dambis, A. K.

2009-11-01

For every OB-association from the list by Blaha and Humphreys (1989AJ.....98.1598B) we give the mean galactic coordinates l and b, the mean heliocentric distance r, median line-of-sight velocity Vr, the dispersion of line-of-sight velocities dvr, and number of stars with known line-of-sight velocity nvr. The line-of-sight velocities were taken from the catalog by Barbier-Brossat and Figon (1999, Cat. ). We used only the velocities measured with errors of less than 10km/s which corresponds to the quality estimations A, B, and C. We also present median proper motions of OB-associations along l- and b- coordinates, mul and mub. The data obtained for the old reduction (1997, Cat. ) are denoted by the subscript 1, whereas those based on the reduction by van Leewen (2008, Cat. ) are marked by the subscript 2. For each OB association we represent the dispersions of proper motions, dml and dmb, as well as a number of stars nmu with known proper motion. The last column shows the total number of stars with known photometric measurements, Nt, used for determination of the distances for OB-associations. The distances r correspond to the short distance scale for classical Cepheids. They are equal to the distances from the catalog by Blaha and Humphreys (1989AJ.....98.1598B), rBH, multiplied by a factor of 0.8, r=0.8*rBH. (1 data file).

Reference values for serum leptin in healthy non-obese children and adolescents

DEFF Research Database (Denmark)

Lausten-Thomsen, Ulrik; Christiansen, Michael; Hedley, Paula Louise

2016-01-01

. Methods: A total of 1193 healthy, non-obese Danish schoolchildren (730 girls, 463 boys) aged 6–18 years (median 11.9) were examined by trained medical staff. Serum leptin and sOB-R concentrations in venous fasting blood samples were quantitated by immunoassay. Percentile curves of leptin, sOB-R, and free...

The CIDA-QUEST large-scale survey of Orion OB1: evidence for rapid disk dissipation in a dispersed stellar population.

Science.gov (United States)

Briceño, C; Vivas, A K; Calvet, N; Hartmann, L; Pacheco, R; Herrera, D; Romero, L; Berlind, P; Sánchez, G; Snyder, J A; Andrews, P

2001-01-05

We are conducting a large-scale, multiepoch, optical photometric survey [Centro de Investigaciones de Astronomia-Quasar Equatorial Survey Team (CIDA-QUEST)] covering about 120 square degrees to identify the young low-mass stars in the Orion OB1 association. We present results for an area of 34 square degrees. Using photometric variability as our main selection criterion, as well as follow-up spectroscopy, we confirmed 168 previously unidentified pre-main sequence stars that are about 0.6 to 0.9 times the mass of the sun (Mo), with ages of about 1 million to 3 million years (Ori OB1b) and about 3 million to 10 million years (Ori OB1a). The low-mass stars are spatially coincident with the high-mass (at least 3 Mo) members of the associations. Indicators of disk accretion such as Halpha emission and near-infrared emission from dusty disks fall sharply from Ori OB1b to Ori OB1a, indicating that the time scale for disk dissipation and possibly the onset of planet formation is a few million years.

Structure-guided mutational analysis of the OB, HhH, and BRCT domains of Escherichia coli DNA ligase.

Science.gov (United States)

Wang, Li Kai; Nair, Pravin A; Shuman, Stewart

2008-08-22

NAD(+)-dependent DNA ligases (LigAs) are ubiquitous in bacteria and essential for growth. LigA enzymes have a modular structure in which a central catalytic core composed of nucleotidyltransferase and oligonucleotide-binding (OB) domains is linked via a tetracysteine zinc finger to distal helix-hairpin-helix (HhH) and BRCT (BRCA1-like C-terminal) domains. The OB and HhH domains contribute prominently to the protein clamp formed by LigA around nicked duplex DNA. Here we conducted a structure-function analysis of the OB and HhH domains of Escherichia coli LigA by alanine scanning and conservative substitutions, entailing 43 mutations at 22 amino acids. We thereby identified essential functional groups in the OB domain that engage the DNA phosphodiester backbone flanking the nick (Arg(333)); penetrate the minor grove and distort the nick (Val(383) and Ile(384)); or stabilize the OB fold (Arg(379)). The essential constituents of the HhH domain include: four glycines (Gly(455), Gly(489), Gly(521), Gly(553)), which bind the phosphate backbone across the minor groove at the outer margins of the LigA-DNA interface; Arg(487), which penetrates the minor groove at the outer margin on the 3 (R)-OH side of the nick; and Arg(446), which promotes protein clamp formation via contacts to the nucleotidyltransferase domain. We find that the BRCT domain is required in its entirety for effective nick sealing and AMP-dependent supercoil relaxation.

Far-infrared and CO observations of Cep F: Implications for star formation in Cepheus OB3

International Nuclear Information System (INIS)

Sargent, A.I.; van Duinen, R.J.; Nordh, H.L.; Fridlund, C.V.M.; Aalders, J.W.G.; Beintema, D.

1983-01-01

Observations at 80-μm and 130-μm have revealed a source of far-infrared emission in the Cep F portion of the Cepheus OB3 molecular cloud. Molecular line measurements of this region, at the CO J = 1-0 line frequency, have led to the discovery of two CO maxima. One of these coincides with the new far-infrared source. The other is at least as intense as Cep B, until now considered to be the hottest part of the cloud. There is some evidence to suggest that a second far-infrared source is associated with this hotspot. If the far-infrared emission results from the presence of embedded protostars, their location, relative to the OB association stars and to the other active region, Cep A, requires a reexamination of how stars form in the Cepheus OB3 association

An unidentified TeV source in the vicinity of Cygnus OB2

Science.gov (United States)

Aharonian, F.; Akhperjanian, A.; Beilicke, M.; Bernlöhr, K.; Börst, H.; Bojahr, H.; Bolz, O.; Coarasa, T.; Contreras, J.; Cortina, J.; Denninghoff, S.; Fonseca, V.; Girma, M.; Götting, N.; Heinzelmann, G.; Hermann, G.; Heusler, A.; Hofmann, W.; Horns, D.; Jung, I.; Kankanyan, R.; Kestel, M.; Kettler, J.; Kohnle, A.; Konopelko, A.; Kornmeyer, H.; Kranich, D.; Krawczynski, H.; Lampeitl, H.; Lopez, M.; Lorenz, E.; Lucarelli, F.; Magnussen, N.; Mang, O.; Meyer, H.; Milite, M.; Mirzoyan, R.; Moralejo, A.; Ona, E.; Panter, M.; Plyasheshnikov, A.; Prahl, J.; Pühlhofer, G.; Rauterberg, G.; Reyes, R.; Rhode, W.; Ripken, J.; Röhring, A.; Rowell, G. P.; Sahakian, V.; Samorski, M.; Schilling, M.; Schröder, F.; Siems, M.; Sobzynska, D.; Stamm, W.; Tluczykont, M.; Völk, H. J.; Wiedner, C. A.; Wittek, W.; Uchiyama, Y.; Takahashi, T.; HEGRA Collaboration

2002-10-01

Deep observation ( ~ 113 hrs) of the Cygnus region at TeV energies using the HEGRA stereoscopic system of air Čerenkov telescopes has serendipitously revealed a signal positionally inside the core of the OB association Cygnus OB2, at the edge of the 95% error circle of the EGRET source 3EG J2033+4118, and ~ 0.5o north of Cyg X-3. The source centre of gravity is RA alphaJ2000: 20h 32m 07s+/- 9.2sstat +/-2.2ssys, Dec deltaJ2000: +41o 30' 30''+/- 2.0'stat +/- 0.4'sys. The source is steady, has a post-trial significance of +4.6sigma , indication for extension with radius 5.6' at the ~ 3sigma level, and has a differential power-law flux with hard photon index of -1.9 +/-0.3stat +/-0.3sys. The integral flux above 1 TeV amounts ~ 3% that of the Crab. No counterpart for the TeV source at other wavelengths is presently identified, and its extension would disfavour an exclusive pulsar or AGN origin. If associated with Cygnus OB2, this dense concentration of young, massive stars provides an environment conducive to multi-TeV particle acceleration and likely subsequent interaction with a nearby gas cloud. Alternatively, one could envisage gamma -ray production via a jet-driven termination shock.

BOREAS TF-3 Automated Chamber CO2 Flux Data from the NSA-OBS

Science.gov (United States)

Goulden, Michael L.; Crill, Patrick M.; Hall, Forrest G. (Editor); Conrad, Sara (Editor)

2000-01-01

The BOReal Ecosystem Atmosphere Study Tower Flux (BOREAS TF-3) and Trace Gas Biogeochemistry (TGB-1) teams collected automated CO2 chamber flux data in their efforts to fully describe the CO2 flux at the Northern Study Area-Old Black Spruce (NSA-OBS) site. This data set contains fluxes of CO2 at the NSA-OBS site measured using automated chambers. In addition to reporting the CO2 flux, it reports chamber air temperature, moss temperature, and light levels during each measurement. The data set covers the period from 23-Sep-1995 through 26-Oct-1995 and from 28-May-1996 through 21-Oct-1996. The data are stored in tabular ASCII files.

Mass loss from OB supergiants in x-ray binary systems

International Nuclear Information System (INIS)

Alme, M.L.; Wilson, J.R.

1975-01-01

A study of the atmospheres of OB supergiants in x-ray binary systems indicates that when the stellar surface is close enough to the saddle in the gravitational potential to provide a mass transfer rate adequate to power a compact x-ray source, large-amplitude variations in the rate of mass flow occur. 9 references

Relative Stabilities of Conserved and Non-Conserved Structures in the OB-Fold Superfamily

Directory of Open Access Journals (Sweden)

Andrei T. Alexandrescu

2009-05-01

Full Text Available The OB-fold is a diverse structure superfamily based on a β-barrel motif that is often supplemented with additional non-conserved secondary structures. Previous deletion mutagenesis and NMR hydrogen exchange studies of three OB-fold proteins showed that the structural stabilities of sites within the conserved β-barrels were larger than sites in non-conserved segments. In this work we examined a database of 80 representative domain structures currently classified as OB-folds, to establish the basis of this effect. Residue-specific values were obtained for the number of Cα-Cα distance contacts, sequence hydrophobicities, crystallographic B-factors, and theoretical B-factors calculated from a Gaussian Network Model. All four parameters point to a larger average flexibility for the non-conserved structures compared to the conserved β-barrels. The theoretical B-factors and contact densities show the highest sensitivity.Our results suggest a model of protein structure evolution in which novel structural features develop at the periphery of conserved motifs. Core residues are more resistant to structural changes during evolution since their substitution would disrupt a larger number of interactions. Similar factors are likely to account for the differences in stability to unfolding between conserved and non-conserved structures.

Marked augmentation of PLGA nanoparticle-induced metabolically beneficial impact of γ-oryzanol on fuel dyshomeostasis in genetically obese-diabetic ob/ob mice.

Science.gov (United States)

Kozuka, Chisayo; Shimizu-Okabe, Chigusa; Takayama, Chitoshi; Nakano, Kaku; Morinaga, Hidetaka; Kinjo, Ayano; Fukuda, Kotaro; Kamei, Asuka; Yasuoka, Akihito; Kondo, Takashi; Abe, Keiko; Egashira, Kensuke; Masuzaki, Hiroaki

2017-11-01

Our previous works demonstrated that brown rice-specific bioactive substance, γ-oryzanol acts as a chaperone, attenuates exaggerated endoplasmic reticulum (ER) stress in brain hypothalamus and pancreatic islets, thereby ameliorating metabolic derangement in high fat diet (HFD)-induced obese diabetic mice. However, extremely low absorption efficiency from intestine of γ-oryzanol is a tough obstacle for the clinical application. Therefore, in this study, to overcome extremely low bioavailability of γ-oryzanol with super-high lipophilicity, we encapsulated γ-oryzanol in polymer poly (DL-lactide-co-glycolide) (PLGA) nanoparticles (Nano-Orz), and evaluated its metabolically beneficial impact in genetically obese-diabetic ob/ob mice, the best-known severest diabetic model in mice. To our surprise, Nano-Orz markedly ameliorated fuel metabolism with an unexpected magnitude (∼1000-fold lower dose) compared with regular γ-oryzanol. Furthermore, such a conspicuous impact was achievable by its administration once every 2 weeks. Besides the excellent impact on dysfunction of hypothalamus and pancreatic islets, Nano-Orz markedly decreased ER stress and inflammation in liver and adipose tissue. Collectively, nanotechnology-based developments of functional foods oriented toward γ-oryzanol shed light on the novel approach for the treatment of a variety of metabolic diseases in humans.

Obésité abdominale et autres biomarqueurs de risque ...

African Journals Online (AJOL)

Obésité abdominale et autres biomarqueurs de risque cardiométabolique: influence du niveau socioéconomique et du mode de vie dans deux populations noires apparentées, Cotonou (Bénin) et Port-au-Prince (Haïti). Asma EL Mabchour, Hélène Delisle, Colette Vilgrain, Phillipe Larco, Roger Sodjinou ...

Improvements to the gridding of precipitation data across Europe under the E-OBS scheme

Science.gov (United States)

Cornes, Richard; van den Besselaar, Else; Jones, Phil; van der Schrier, Gerard; Verver, Ge

2016-04-01

Gridded precipitation data are a valuable resource for analyzing past variations and trends in the hydroclimate. Such data also provide a reference against which model simulations may be driven, compared and/or adjusted. The E-OBS precipitation dataset is widely used for such analyses across Europe, and is particularly valuable since it provides a spatially complete, daily field across the European domain. In this analysis, improvements to the E-OBS precipitation dataset will be presented that aim to provide a more reliable estimate of grid-box precipitation values, particularly in mountainous areas and in regions with a relative sparsity of input station data. The established three-stage E-OBS gridding scheme is retained, whereby monthly precipitation totals are gridded using a thin-plate spline; daily anomalies are gridded using indicator kriging; and the final dataset is produced by multiplying the two grids. The current analysis focuses on improving the monthly thin-plate spline, which has overall control on the final daily dataset. The results from different techniques are compared and the influence on the final daily data is assessed by comparing the data against gridded country-wide datasets produced by various National Meteorological Services

Neutral hydrogen in the stellar accociation Scorpius OB-2

Energy Technology Data Exchange (ETDEWEB)

Bystrova, N.V.

1979-01-01

The distribution of neutral hydrogen connected with the stellar association Scorpius OB-2 is more complex than the expanding semienvelope suggested earlier. The neutral gas is in connection with the nebulae S1, S7, S9 and with H/sub ..cap alpha../-filaments found in the association and giving it the appearence of a spiral galaxy. The HI-distribution is in disagreement with the model of a supernova remnant.

ObStruct: a method to objectively analyse factors driving population structure using Bayesian ancestry profiles.

Directory of Open Access Journals (Sweden)

Velimir Gayevskiy

Full Text Available Bayesian inference methods are extensively used to detect the presence of population structure given genetic data. The primary output of software implementing these methods are ancestry profiles of sampled individuals. While these profiles robustly partition the data into subgroups, currently there is no objective method to determine whether the fixed factor of interest (e.g. geographic origin correlates with inferred subgroups or not, and if so, which populations are driving this correlation. We present ObStruct, a novel tool to objectively analyse the nature of structure revealed in Bayesian ancestry profiles using established statistical methods. ObStruct evaluates the extent of structural similarity between sampled and inferred populations, tests the significance of population differentiation, provides information on the contribution of sampled and inferred populations to the observed structure and crucially determines whether the predetermined factor of interest correlates with inferred population structure. Analyses of simulated and experimental data highlight ObStruct's ability to objectively assess the nature of structure in populations. We show the method is capable of capturing an increase in the level of structure with increasing time since divergence between simulated populations. Further, we applied the method to a highly structured dataset of 1,484 humans from seven continents and a less structured dataset of 179 Saccharomyces cerevisiae from three regions in New Zealand. Our results show that ObStruct provides an objective metric to classify the degree, drivers and significance of inferred structure, as well as providing novel insights into the relationships between sampled populations, and adds a final step to the pipeline for population structure analyses.

Efeitos agudos do exercício resistido sobre marcadores da resposta inflamatória e imune

OpenAIRE

Guilherme Borges Pereira

2012-01-01

O objetivo dos pesquisadores do presente estudo foi examinar os efeitos agudos do Exercício Resistido (ER) sobre a apoptose (Anexina V+) e a migração (CX3CR1) de linfócitos T CD4+ e CD8+. 12 sujeitos adultos realizaram duas sessões de ER (3 séries em 9 exercícios) com 1 minuto (Hiper-1) e 3 minutos (Hiper-3) de intervalo entre as séries e exercícios. Não foi observada alteração significativa na contagem celular de linfócitos CD4+ e CD8+ após os protocolos Hiper-1 e Hiper-3 (p > 0,05). Foi obs...

Examination of the site amplification factor of OBS and their application to magnitude estimation and ground-motion prediction for EEW

Science.gov (United States)

Hayashimoto, N.; Hoshiba, M.

2013-12-01

1. Introduction Ocean bottom seismograph (OBS) is useful for making Earthquake Early Warning (EEW) earlier. However, careful handling of these data is required because the installation environment of OBSs may be different from that of land stations. Site amplification factor is an important factor to estimate the magnitudes, and to predict ground motions (e.g. seismic intensity) in EEW. In this presentation, we discuss the site amplification factor of OBS in the Tonankai area of Japan from these two points of view. 2. Examination of magnitude correction of OBS In the EEW of JMA, the magnitude is estimated from the maximum amplitude of the displacement in real time. To provide the fast magnitude estimation, the magnitude-estimation algorithm switches from the P to S formula (Meew(P) to Meew(S)) depending on the expected S-phase arrival (Kamigaichi,2004). To estimate the magnitude correction for OBS, we determine Meew(P) and Meew(S) at OBSs and compare them with JMA magnitude (Mjma). We find Meew(S) at OBS is generally larger than Mjma by approximately 0.6. The slight differences of spatial distribution of Meew(S) amplification are also found among other OBSs. From the numerical simulations, Nakamura et al. (MGR,submitted) pointed out that the oceanic layer and the low-velocity sediment layers causes the large amplifications in low frequency range (0.1-0.2Hz) at OBSs. We conclude that the site effect of OBS characterized by such a low velocity sediment layers causes those amplification of Magnitude. 3. The frequency-dependent site factor of OBS estimated from Fourier spectrum ratio and their application for prediction of seismic intensity of land station We compare Fourier spectra of S-wave portion on OBSs with those on adjacent land stations. Station pair whose distance is smaller than 50 km is analyzed, and we obtain that spectral ratio of land station (MIEH05 of the KiK-net/NIED) to OBS (KMA01 of the DONET/JAMSTEC) is 5-20 for frequencies 10-20Hz for both

OB/GYN boot cAMP using high-fidelity human simulators: enhancing residents' perceived competency, confidence in taking a leadership role, and stress hardiness.

Science.gov (United States)

Pliego, Jose F; Wehbe-Janek, Hania; Rajab, M Hasan; Browning, Jeff L; Fothergill, Russell E

2008-01-01

To evaluate the effectiveness of an obstetrical and gynecologic (Ob/Gyn) Boot Camp simulation training on perceived technical competency, confidence in a leadership role, and stress hardiness of resident training. We conducted a prospective pilot study on the effectiveness of an Ob/Gyn Boot Camp on resident training. Residents participated in an intensive immersion in clinical simulation of common obstetrical emergencies including shoulder dystocia, neonatal resuscitation, postpartum hemorrhage, and ruptured ectopic pregnancy. After the training, residents completed a Web-based survey on their perceptions of how the Ob/Gyn Boot Camp affected their 1) technical competency in the assessment and management of their patients, 2) confidence in taking a leadership role, and 3) stress hardiness. Residents rated their perceptions on a Likert scale of 1 to 5, 1 = poor to 5 = excellent. Twenty-three (14 Ob/Gyn and 9 family medicine) residents participated in this pilot study. Eighteen (78%) residents completed the online survey; 4 Ob/Gyn and 1 family medicine resident did not complete the survey. The residents reported that the simulation training stimulated an interest in learning key skills for obstetrical and gynecologic emergencies. Ob/Gyn residents reported significant improvement in their perceived technical competence and stress hardiness after the Boot Camp. However both Ob/Gyn and family medicine residents reported no significant improvement of confidence in their leadership abilities during obstetrical emergencies after the Boot Camp. Boot Camp simulation training early in the curriculum has the potential for enhancing residents' self-assessments of confidence, competency, and stress hardiness in managing obstetrical emergencies.

A M2FS Spectroscopic Study of Low-mass Young Stars in Orion OB1

Science.gov (United States)

Kaleida, Catherine C.; Briceno, Cesar; Calvet, Nuria; Mateo, Mario L.; Hernandez, Jesus

2015-01-01

Surveys of pre-main sequence stars in the ~4-10 Myr range provide a window into the decline of the accretion phase of stars and the formation of planets. Nearby star clusters and stellar associations allow for the study of these young stellar populations all the way down to the lowest mass members. One of the best examples of nearby 4-10 Myr old stellar populations is the Orion OB1 association. The CIDA Variability Survey of Orion OB1 (CVSO - Briceño et al. 2001) has used the variability properties of low-mass pre-main-sequence (PMS) stars to identify hundreds of K and M-type stellar members of the Orion OB1 association, a number of them displaying IR-excess emission and thought to be representative of more evolved disk-bearing young stars. Characterizing these young, low-mass objects using spectroscopy is integral to understanding the accretion phase in young stars. We present preliminary results of a spectroscopic survey of candidate and confirmed Orion OB1 low-mass members taken during November 2014 and February 2014 using the Michigan/Magellan Fiber Spectrograph (M2FS), a PI instrument on the Magellan Clay Telescope (PI: M. Matteo). Target fields located in the off-cloud regions of Orion were identified in the CVSO, and observed using the low and high-resolution modes of M2FS. Both low and high-resolution spectra are needed in order to confirm membership and derive masses, ages, kinematics and accretion properties. Initial analysis of these spectra reveal many new K and M-type members of the Orion OB1 association in these low extinction, off-cloud areas. These are the more evolved siblings of the youngest stars still embedded in the molecular clouds, like those in the Orion Nebula Cluster. With membership and spectroscopic indicators of accretion we are building the most comprehensive stellar census of this association, enabling us to derive a robust estimate of the fraction of young stars still accreting at a various ages, a key constraint for the end of

Cesium-137 global fallout into the Ob river basin and its influence on the Kara sea contamination - Weapons fallout cesium-137 in the Ob' catchment landscapes and its influence on radioactive contamination of the Kara sea: Western Siberia, Russia

Energy Technology Data Exchange (ETDEWEB)

Semenkov, Ivan N.; Miroshnikov, Alexey Yu. [The Organization of Russian Academy of Sciences Institute of geology of ore deposits, petrography, mineralogy and geochemistry Russian Academy of Sciences (Russian Federation)

2014-07-01

There are several high level {sup 137}Cs anomaly zones detected in the deposits of the SW part of the Kara Sea. These anomaly zones were formed in the Ob' and the Enisey river estuaries due to the geochemical 'river-sea' boarder barrier. Level of radiocaesium specific activity reaches 120 Bq*kg{sup -1} in the deposits from these zones. Radiochemical enterprises occur in the both river basins. Their activity results in caesium-137 transfer into the river net. Vast area is contaminated by {sup 137}Cs after nuclear weapons in Semipalatinsk test-site and Kyshtym disaster in the Ob' river basin. Moreover, caesium comes to the Ob' and the Enisey river basins with global atmospheric fallout. The inflow of global fallout caesium-137 to the catchments is 660 kCi (320 kCi including radioactive decay) that is 4 times higher than {sup 137}Cs emission due to Fukushima disaster. Therefore, these river basins as any other huge catchment are an important sources of radioactive contamination of the Arctic Ocean. The aim of our research is to study behavior of global fallout caesium-137 in the landscapes of the Ob and the Enisey river basins. We studied caesium-137 behavior on the example of first order catchments in taiga, wetland, forest-steppe, steppe, and semi-arid landscapes. Geographic information system (GIS) was made. The tenth-order catchments (n=154, Horton coding system) shape 20-groups due to topsoil properties controlling cesium mobility. Eleven first-order basins, characterized 7 groups of tenth order catchments, were studied. And 700 bulk-core soil samples were collected in 2011-2013. Cesium runoff is calculated for 3 first-order river basins in taiga and forest-steppe landscapes. Storage of global fallout caesium-137 declines from undisturbing taiga first-order river basin (90% of cumulative fallout including radioactive decay)> arable steppe and fores-steppe (70 - 75%)> undisturbing wetland (60%). Caesium-137 transfer is high in arable lands

Case Study of Data Mining in Observational Astronomy: The Search for New OB Stars in the Small Magellanic Cloud

Science.gov (United States)

Larkin, Cormac; Vink, Jorick; Kalari, Venu; Groh, Jose

2018-01-01

OB stars are the most luminous and massive stars, living short lives and exerting a disproportionate influence on their environments. They are key to understanding progenitors of gravitational wave sources and reionization of the early Universe. To detect new OB stars, we combine photometric catalog data with TLUSTY and ATLAS9 stellar atmospheres. This method is also believed to be sensitive to elusive “stripped” stars, thought to lose their hydrogen envelope through binary interaction.OB stars are intrinsically luminous, so complete populations are assumed for local group galaxies such as the Small Magellanic Cloud. Our findings challenge this, as we find 26 new OB candidates. Spectroscopy of 7 candidates shows a 100% detection rate. Most interestingly, 5 of our candidates are consistent with “stripped” stars.To date only 5 “stripped” candidates have been found serendipitously (e.g. HD 45166) as current methods are not sensitive to them. Our work doubles the sample of detected candidates, highlighting that our approach is the first to identify them in a targeted, systematic way. The finding of “stripped” stars could rewrite our understanding of the early Universe, offering an alternative hypothesis to Wolf-Rayet driven cosmic reionization.

Deposition of plutonium isotopes and Cs-137 in sediments of the Ob delta from the beginning of the nuclear age

International Nuclear Information System (INIS)

Panteleyev, G.P.; Livingston, H.D.; Sayles, F.L.; Medkova, O.N.

1995-01-01

As an approach to an assessment of the transport of artificial radionuclides through the Ob river system towards the arctic Ocean, results are presented from the analyses of a series of sediment cores collected in the Ob delta and estuary in 1994. These cores, collected in areas of sediment accumulation, contain the depositional history at the Ob mouth of substances associated with sediment particles from the whole river system watershed. Several approaches to dating these sediments permitted the development of a chronology for the deposition of plutonium isotopes and Cs-137, following their first introduction to the environment a half century ago. Some preliminary results for I-129 are also presented. 6 figs

Performance analysis of signaling protocols on OBS switches

Science.gov (United States)

Kirci, Pinar; Zaim, A. Halim

2005-10-01

In this paper, Just-In-Time (JIT), Just-Enough-Time (JET) and Horizon signalling schemes for Optical Burst Switched Networks (OBS) are presented. These signaling schemes run over a core dWDM network and a network architecture based on Optical Burst Switches (OBS) is proposed to support IP, ATM and Burst traffic. In IP and ATM traffic several packets are assembled in a single packet called burst and the burst contention is handled by burst dropping. The burst length distribution in IP traffic is arbitrary between 0 and 1, and is fixed in ATM traffic at 0,5. Burst traffic on the other hand is arbitrary between 1 and 5. The Setup and Setup ack length distributions are arbitrary. We apply the Poisson model with rate λ and Self-Similar model with pareto distribution rate α to identify inter-arrival times in these protocols. We consider a communication between a source client node and a destination client node over an ingress and one or more multiple intermediate switches.We use buffering only in the ingress node. The communication is based on single burst connections in which, the connection is set up just before sending a burst and then closed as soon as the burst is sent. Our analysis accounts for several important parameters, including the burst setup, burst setup ack, keepalive messages and the optical switching protocol. We compare the performance of the three signalling schemes on the network under as burst dropping probability under a range of network scenarios.

Toward Complete Statistics of Massive Binary Stars: Penultimate Results from the Cygnus OB2 Radial Velocity Survey

OpenAIRE

Kobulnicky, Henry A.; Kiminki, Daniel C.; Lundquist, Michael J.; Burke, Jamison; Chapman, James; Keller, Erica; Lester, Kathryn; Rolen, Emily K.; Topel, Eric; Bhattacharjee, Anirban; Smullen, Rachel A.; Alvarez, Carlos A. Vargas; Runnoe, Jessie C.; Dale, Daniel A.; Brotherton, Michael M.

2014-01-01

We analyze orbital solutions for 48 massive multiple-star systems in the Cygnus OB2 Association, 23 of which are newly presented here, to find that the observed distribution of orbital periods is approximately uniform in log P for P 45 d, even after correction for completeness, indicating either a lower binary fraction or a shift toward low-mass companions. A high degree of similarity (91% likelihood) between the Cyg OB2 period distribution and that of other surveys suggests that the binary p...

BOREAS TF-3 NSA-OBS Tower Flux, Meteorological, and Soil Temperature Data

Science.gov (United States)

Wofsy, Steven; Sutton, Doug; Goulden, Mike; Hall, Forrest G. (Editor); Huemmrich, Karl (Editor)

2000-01-01

The BOReal Ecosystem-Atmosphere Study Tower Flux (BOREAS TF-3) team collected tower flux, surface meteorological, and soil temperature data at the BOREAS Northern Study Area-Old Black Spruce (NSA-OBS) site continuously from the March 1994 through October 1996. The data are available in tabular ASCII files.

The structure of KPN03535 (gi|152972051), a novel putative lipoprotein from Klebsiella pneumoniae, reveals an OB-fold

International Nuclear Information System (INIS)

Das, Debanu; Kozbial, Piotr; Han, Gye Won; Carlton, Dennis; Jaroszewski, Lukasz; Abdubek, Polat; Astakhova, Tamara; Axelrod, Herbert L.; Bakolitsa, Constantina; Chen, Connie; Chiu, Hsiu-Ju; Chiu, Michelle; Clayton, Thomas; Deller, Marc C.; Duan, Lian; Ellrott, Kyle; Elsliger, Marc-André; Ernst, Dustin; Farr, Carol L.; Feuerhelm, Julie; Grzechnik, Anna; Grant, Joanna C.; Jin, Kevin K.; Johnson, Hope A.; Klock, Heath E.; Knuth, Mark W.; Krishna, S. Sri; Kumar, Abhinav; Marciano, David; McMullan, Daniel; Miller, Mitchell D.; Morse, Andrew T.; Nigoghossian, Edward; Nopakun, Amanda; Okach, Linda; Oommachen, Silvya; Paulsen, Jessica; Puckett, Christina; Reyes, Ron; Rife, Christopher L.; Sefcovic, Natasha; Tien, Henry J.; Trame, Christine B.; Bedem, Henry van den; Weekes, Dana; Wooten, Tiffany; Xu, Qingping; Hodgson, Keith O.; Wooley, John; Deacon, Ashley M.; Godzik, Adam; Lesley, Scott A.; Wilson, Ian A.

2009-01-01

KPN03535 is a protein unique to K. pneumoniae. The crystal structure reveals that KPN03535 represents a novel variant of the OB-fold and is likely to be a DNA-binding lipoprotein. KPN03535 (gi|152972051) is a putative lipoprotein of unknown function that is secreted by Klebsiella pneumoniae MGH 78578. The crystal structure reveals that despite a lack of any detectable sequence similarity to known structures, it is a novel variant of the OB-fold and structurally similar to the bacterial Cpx-pathway protein NlpE, single-stranded DNA-binding (SSB) proteins and toxins. K. pneumoniae MGH 78578 forms part of the normal human skin, mouth and gut flora and is an opportunistic pathogen that is linked to about 8% of all hospital-acquired infections in the USA. This structure provides the foundation for further investigations into this divergent member of the OB-fold family

Analyzing the Effects of Nitrogen Deficiency on the PHB Production of Methylosinus trichosporium OB3b

Science.gov (United States)

Kyauk, E.

2011-12-01

Polyhydroxybutyrate (PHB) is a biodegradable thermoplastic that is produced by various microorganisms. Because of its potential to replace conventional plastics, it has been closely researched in the past few years. Methanotrophic bacteria, bacteria that consume methane, produce this bioplastic when it lacks certain nutrients. The utilization of methane to produce PHB shows much promise as methane is a cheap, plentiful gas. In this study, we observed the methanotroph, Methylosinus trichosporium OB3b , and its yield of PHB in the absence of nitrogen. The optical density of Methylosinus trichosporium OB3b was measured in order to observe cell growth and PHB production patterns over a 48 hour period.

Polimorfismos del gen ob en bovinos de raza holstein en la Comarca Lagunera, México

Directory of Open Access Journals (Sweden)

Sarai S. Mendoza-Retana

2017-01-01

Full Text Available La Comarca Lagunera es la cuenca lechera más importante de México. En la actualidad se están utilizando diversas técnicas que permiten evaluar genéticamente el animal a una edad temprana, permitiendo seleccionar futuros reproductores con características deseables. Entre los genes relacionados con la producción de leche, se encuentran el gen Ob también llamado gen Leptina el cual actúa sobre el sistema nervioso central y tejidos periféricos jugando un papel muy importante en la modulación regulación del apetito, ganancia de peso vivo, incremento del metabolismo energético y el anabolismo muscular. Este trabajo se realizó para determinar el polimorfismo de longitud del fragmento de restricción ACI I de gen leptina en el exón 2 y correlacionarlo con los parámetros de producción y calidad de leche. Se recolectaron 100 muestra de sangre de vacas en producción del establo “Lácteos Florida” de Francisco I. Madero municipio de Coahuila, México con tres esta tus de producción: altas, medias y bajas La extracción de ADN se realizó por el método modificado de Salting - Out. Se realizó PCR del gen leptina originando un fragmento de 272 bp de longitud y se realizó PCR - RFLP con la enzima de restricción ACI I y secue nciación, correlacionando los genotipos TT, CT Y CC con tres estatus de producción de leche: altas, medias, bajas. El análisis estadístico indicó que las vacas portadoras del genotipo homocigoto (TT tienen un efecto significativo (P<0.01 con respecto a l as características de producción y calidad de leche ya que tuvieron un mayor consumo de alimento, ganancia de peso, además de una elevada producción de leche en comparación a los genotipos heterocigoto (CT y homocigoto (CC. Los resultados obtenidos muest ran que l a identificación molecular de polimorfismos del gen Ob puede usarse como herramienta de selección genética en bovinos de raza Holstein.

A Search for Pulsar Companions to OB Runaway Stars

Science.gov (United States)

Kaspi, V. M.

1995-01-01

We have searched for radio pulsar companions to 40 nearby OB runaway stars. Observations were made at 474 and 770 MHz with the NRAO 140 ft telescope. The survey was sensitive to long- period pulsars with flux densities of 1 mJy or more. One previously unknown pulsar was discovered, PSRJ2044+4614, while observing towards target O star BD+45,3260. Follow-up timing observations of the pulsar measured its position to high precision, revealing a 9' separation between the pulsar and the target star, unequivocally indicating they are not associated.

ObsPy: Establishing and maintaining an open-source community package

Science.gov (United States)

Krischer, L.; Megies, T.; Barsch, R.

2017-12-01

Python's ecosystem evolved into one of the most powerful and productive research environment across disciplines. ObsPy (https://obspy.org) is a fully community driven, open-source project dedicated to provide a bridge for seismology into that ecosystem. It does so by offering Read and write support for essentially every commonly used data format in seismology, Integrated access to the largest data centers, web services, and real-time data streams, A powerful signal processing toolbox tuned to the specific needs of seismologists, and Utility functionality like travel time calculations, geodetic functions, and data visualizations. ObsPy has been in constant unfunded development for more than eight years and is developed and used by scientists around the world with successful applications in all branches of seismology. By now around 70 people directly contributed code to ObsPy and we aim to make it a self-sustaining community project.This contributions focusses on several meta aspects of open-source software in science, in particular how we experienced them. During the panel we would like to discuss obvious questions like long-term sustainability with very limited to no funding, insufficient computer science training in many sciences, and gaining hard scientific credits for software development, but also the following questions: How to best deal with the fact that a lot of scientific software is very specialized thus usually solves a complex problem but at the same time can only ever reach a limited pool of developers and users by virtue of it being so specialized? Therefore the "many eyes on the code" approach to develop and improve open-source software only applies in a limited fashion. An initial publication for a significant new scientific software package is fairly straightforward. How to on-board and motivate potential new contributors when they can no longer be lured by a potential co-authorship? When is spending significant time and effort on reusable

Development of the TeamOBS-PPH - targeting clinical performance in postpartum hemorrhage.

Science.gov (United States)

Brogaard, Lise; Hvidman, Lone; Hinshaw, Kim; Kierkegaard, Ole; Manser, Tanja; Musaeus, Peter; Arafeh, Julie; Daniels, Kay I; Judy, Amy E; Uldbjerg, Niels

2018-06-01

This study aimed to develop a valid and reliable TeamOBS-PPH tool for assessing clinical performance in the management of postpartum hemorrhage (PPH). The tool was evaluated using video-recordings of teams managing PPH in both real-life and simulated settings. A Delphi panel consisting of 12 obstetricians from the UK, Norway, Sweden, Iceland, and Denmark achieved consensus on (i) the elements to include in the assessment tool, (ii) the weighting of each element, and (iii) the final tool. The validity and reliability were evaluated according to Cook and Beckman. (Level 1) Four raters scored four video-recordings of in situ simulations of PPH. (Level 2) Two raters scored 85 video-recordings of real-life teams managing patients with PPH ≥1000 mL in two Danish hospitals. (Level 3) Two raters scored 15 video-recordings of in situ simulations of PPH from a US hospital. The tool was designed with scores from 0 to 100. (Level 1) Teams of novices had a median score of 54 (95% CI 48-60), whereas experienced teams had a median score of 75 (95% CI 71-79; p < 0.001). (Level 2) The intra-rater [intra-class correlation (ICC) = 0.96] and inter-rater (ICC = 0.83) agreements for real-life PPH were strong. The tool was applicable in all cases: atony, retained placenta, and lacerations. (Level 3) The tool was easily adapted to in situ simulation settings in the USA (ICC = 0.86). The TeamOBS-PPH tool appears to be valid and reliable for assessing clinical performance in real-life and simulated settings. The tool will be shared as the free TeamOBS App. © 2018 Nordic Federation of Societies of Obstetrics and Gynecology.

OB ASSOCIATIONS AT THE UPPER END OF THE MILKY WAY LUMINOSITY FUNCTION

Energy Technology Data Exchange (ETDEWEB)

Rahman, Mubdi; Matzner, Christopher D.; Moon, Dae-Sik, E-mail: mubdi@pha.jhu.edu [Department of Astronomy and Astrophysics, University of Toronto, 50 St. George Street, Toronto, ON M5S 3H8 (Canada)

2013-04-01

The Milky Way's most luminous, young, and massive (M {approx}> 10{sup 4} M{sub Sun }) star clusters and OB associations have largely evaded detection despite knowledge of their surrounding H II regions. We search for these clusters and associations within the 40 star-forming complexes from Rahman and Murray in the 13 most luminous Wilkinson Microwave Anisotropy Probe (WMAP) free-free emission sources of the Galaxy. Selecting for objects with the dust-reddened colors of OB stars, we identify new candidate associations using the Two Micron All Sky Survey point-source catalog. In 40 star-forming complexes searched, 22 contain cluster/association candidates with sizes and masses in the range of 3'-26' and 10{sup 2.3}-10{sup 5} M{sub Sun }. Of the 22 candidates, at least seven have estimated masses {approx}> 10{sup 4} M{sub Sun }, doubling the number of such massive clusters known in the Galaxy. Only one of the searched WMAP sources remains without a candidate. Applying our method to a statistically similar set of test locations, we estimate that 3.0 {+-} 0.6 of our 22 candidate associations are unrelated to the star-forming complexes. In addition, the apparent extinctions of our candidate associations correlate well with the predictions from a Galactic model. These facts, along with the clear detection of a known OB association and the previous spectral verification of one cluster found by this method, validate our method. In eight of the most luminous WMAP sources, the candidate associations can account for the observed free-free flux. With our new compilation, the Galactic census of young, massive stellar associations may now be about half complete.

Asteroseismology of OB stars with hundreds of single snapshot spectra (and a few time-series of selected targets)

Science.gov (United States)

Simón-Díaz, S.

2015-01-01

Imagine we could do asteroseismology of large samples of OB-type stars by using just one spectrum per target. That would be great! But this is probably a crazy and stupid idea. Or maybe not. Maybe we have the possibility to open a new window to investigate stellar oscillations in massive stars that has been in front of us for many years, but has not attracted very much our attention: the characterization and understanding of the so-called macroturbulent broadening in OB-type stars.

Into the Darkness: Interstellar Extinction Near the Cepheus OB3 Molecular Cloud

Science.gov (United States)

Fitzpatrick, Edward L.; Jacklin, S.; Massa, D.

2014-01-01

We present the results of a followup investigation to a study performed by Massa and Savage (1984, ApJ, 279, 310) of the properties of UV interstellar extinction in the region of the Cepheus OB3 molecular cloud. That study was performed using UV photometry and spectro-photometry from the ANS and IUE satellites. We have extended this study into the IR, utilizing the uniform database of IR photometry available from the 2MASS project. This is a part of a larger program whose goal is to study the properties of extinction in localized regions, where we hope to find clues to dust grain growth and destruction processes through spatial correlations of extinction with distinct environmental properties. Similarly to Massa and Savage’s UV results, we find that the IR extinction properties on the Cepheus OB3 region vary systematically with the apparent proximity of the target stars to the molecular cloud. We also find that the UV extinction and the IR extinction are crudely correlated. The methodology leading to these results and their implications are discussed.

Optimal Inversion Parameters for Full Waveform Inversion using OBS Data Set

Science.gov (United States)

Kim, S.; Chung, W.; Shin, S.; Kim, D.; Lee, D.

2017-12-01

In recent years, full Waveform Inversion (FWI) has been the most researched technique in seismic data processing. It uses the residuals between observed and modeled data as an objective function; thereafter, the final subsurface velocity model is generated through a series of iterations meant to minimize the residuals.Research on FWI has expanded from acoustic media to elastic media. In acoustic media, the subsurface property is defined by P-velocity; however, in elastic media, properties are defined by multiple parameters, such as P-velocity, S-velocity, and density. Further, the elastic media can also be defined by Lamé constants, density or impedance PI, SI; consequently, research is being carried out to ascertain the optimal parameters.From results of advanced exploration equipment and Ocean Bottom Seismic (OBS) survey, it is now possible to obtain multi-component seismic data. However, to perform FWI on these data and generate an accurate subsurface model, it is important to determine optimal inversion parameters among (Vp, Vs, ρ), (λ, μ, ρ), and (PI, SI) in elastic media. In this study, staggered grid finite difference method was applied to simulate OBS survey. As in inversion, l2-norm was set as objective function. Further, the accurate computation of gradient direction was performed using the back-propagation technique and its scaling was done using the Pseudo-hessian matrix.In acoustic media, only Vp is used as the inversion parameter. In contrast, various sets of parameters, such as (Vp, Vs, ρ) and (λ, μ, ρ) can be used to define inversion in elastic media. Therefore, it is important to ascertain the parameter that gives the most accurate result for inversion with OBS data set.In this study, we generated Vp and Vs subsurface models by using (λ, μ, ρ) and (Vp, Vs, ρ) as inversion parameters in every iteration, and compared the final two FWI results.This research was supported by the Basic Research Project(17-3312) of the Korea Institute of

EVIDENCE FOR DELAYED MASSIVE STAR FORMATION IN THE M17 PROTO-OB ASSOCIATION

International Nuclear Information System (INIS)

Povich, Matthew S.; Whitney, Barbara A.

2010-01-01

Through analysis of archival images and photometry from the Spitzer GLIMPSE and MIPSGAL surveys combined with Two Micron All Sky Survey and MSX data, we have identified 488 candidate young stellar objects (YSOs) in the giant molecular cloud M17 SWex, which extends ∼50 pc southwest from the prominent Galactic H II region M17. Our sample includes >200 YSOs with masses >3 M sun that will become B-type stars on the main sequence. Extrapolating over the stellar initial mass function (IMF), we find that M17 SWex contains >1.3 x 10 4 young stars, representing a proto-OB association. The YSO mass function is significantly steeper than the Salpeter IMF, and early O stars are conspicuously absent from M17 SWex. Assuming M17 SWex will form an OB association with a Salpeter IMF, these results reveal the combined effects of (1) more rapid circumstellar disk evolution in more massive YSOs and (2) delayed onset of massive star formation.

Adipokines : rôle dans l’obésité et l’insulino‐résistance

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Aubert Roberte

2003-03-01

Full Text Available Le tissu adipeux longtemps considéré comme un organe de stockage est maintenant reconnu comme un organe endocrine. Cette revue étudie l’action de 3 adipokines sécrétées par le tissu adipeux et impliquées dans le contrôle de l’homéostasie énergétique et l’insulino‐résistance, la leptine, l’adiponectine et la résistine. La découverte de la leptine a permis la compréhension des mécanismes centraux de la prise alimentaire et de la dépense énergétique. L’espoir que la leptine puisse intervenir dans le traitement de l’obésité a été déçu, mais elle joue un rôle important dans l’insulino‐sensibilité. L’adiponectine circulante est diminuée dans l’obésité et la perte pondérale augmente son taux. Elle améliore la sensibilité à l’insuline en agissant sur le métabolisme glucidique et lipidique. Bien que pour le moment le rôle de la résistine soit encore mal défini, les études chez l’animal suggèrent qu’elle soit impliqués dans l’insulino‐résistance. Chez l’homme il n’y a pas de relation entre l’expression de la résistine et l’obésité. On peut donc se demander si la résistine, dans l’espèce humaine, est bien le lien entre obésité et diabète de type 2.

Comparison of the biometric measurements calculated with Zeiss IOL-Master and WaveLight OB-820

Directory of Open Access Journals (Sweden)

Labiris G

2017-04-01

Full Text Available Georgios Labiris,1,2 Panagiota Ntonti,2 Konstantinos Ntitsos,2 Andreas Katsanos,2 Haris Sideroudi,2 Vasilios Kozobolis1,2 1Department of Ophthalmology, University Hospital of Alexandroupolis, 2Eye Institute of Thrace, Alexandroupolis, Greece Background: The primary objective of this study was to investigate the level of agreement between IOL-Master and OB-820 ocular biometers.Materials and methods: In this prospective randomized case series, we measured the anterior chamber depth (ACD, the axial length (AL, the corneal radii (R1, R2, the ratio of mean corneal radius and spherical equivalent and the corneal astigmatism (cylinder [Cyl] before and after cataract extraction surgery.Results: Significant differences between pre- and postoperative data were observed for ACD for both biometric devices (P<0.01 and Cyl parameter in IOL-Master. Range and 95% limits of agreement (LoA were clinically significantly different for AL parameter pre- and postoperatively and for R2 and radius and spherical equivalent postoperatively (P<0.001. The rest of the parameters presented sufficient 95% LoA, which imply good agreement.Conclusion: In clinical practice, the IOL-master and OB-820 should not be used interchangeably due to discrepancy in the important AL parameter. Both biometers may provide consistent results regarding Cyl, ACD and R1. Keywords: cataract, IOL-Master, OB-820, biometry, level of agreement

Génétique épidémiologique et moléculaire de l’obésité humaine

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Iron Albert

2000-01-01

Full Text Available L’obésité est une pathologie majeure pour plusieurs raisons qu’il est difficile de hiérarchiser. D’abord parce qu’elle est commune, concernant aujourd’hui près d’un individu sur trois dans les pays industrialisés. Ensuite, parce qu’elle est grave en raison des complications nombreuses et sévères, parmi lesquelles on peut citer des cardiopathies, le diabète, l’HTA, des cancers, etc. Enfin, parce que répondant à la définition de maladie multifactorielle résultant de l’interaction entre des facteurs héréditaires et des facteurs environnementaux, sa connaissance a beaucoup progressé ces dernières années, notamment grâce à l’apport de la génétique moléculaire. À l’échelon individuel et d’une manière simple, on peut définir l’obésité comme résultant d’un excès de tissu adipeux qui va se traduire par un poids élevé par rapport à ce qu’on peut considérer comme étant un poids idéal donné par la formule de Lorentz : Poids idéal (kg = Taille (cm – 100 – [Taille (cm – 150]/4 (homme ou 2,5 (femme Sous l’angle épidémiologique, c’est-à-dire à l’échelle des populations, l’obésité sera définie à partir de critères de nature anthropologique utilisés aussi en clinique pour typer le patient obèse. On peut prendre en compte le rapport du tour de hanche sur le tour de taille (qui permet de définir une obésité de type androïde ou gynoïde selon que ce rapport est supérieur ou inférieur à 0,85 ou la mesure de l’adiposité évaluée par l’appréciation des plis cutanés (en particulier le pli tricipital ou surtout l’indice de corpulence qui est le critère majeur des épidémiologistes pour l’étude de l’obésité chez l’adulte. Cet indice est la référence pour la définition de l’obésité chez l’adulte ; il est aussi appelé indice de masse corporelle (IMC ou indice de Quetelet ; il exprime le rapport du poids (en kg au carré de la taille (en m

Conversion of chlorinated propanes by Methylosinus trichosporium OB3b expressing soluble methane monooxygenase

NARCIS (Netherlands)

Bosma, T.; Janssen, D.B.

Chlorinated propanes are important pollutants that may show persistent behaviour in the environment. The biotransformation of 1-chloropropane, 1,2-dichloropropane, 1,3-dichloropropane and 1,2,3-trichloropropane was studied using resting cell suspensions of Methylosinus trichosporium OB3b expressing

Leptin, Leptin Soluble Receptor, and the Free Leptin Index following a Diet and Physical Activity Lifestyle Intervention in Obese Males and Females

Directory of Open Access Journals (Sweden)

Jeffrey E. Herrick

2016-01-01

Full Text Available Leptin (LEP is associated with appetite regulation and metabolism. Concentration is linear with adiposity, suggesting LEP resistance. LEP circulates freely and bound with its soluble receptor (sOB-r; the ratio is the free leptin index (FLI, an index of leptin resistance; lower FLI suggests reduced biological action. Purpose. The aim was to determine the effect of changes in adipose tissue distribution on LEP, sOB-r, and FLI following 6 months (6 M of a diet/exercise weight loss program (WLP. In addition, we aim to identify predictors of the FLI. Methods. 6 M WLP consisted of diet/lifestyle interventions following ADA guidelines. Body composition was assessed by DXA. LEP and sOB-r analysis were done via ELISA. Results. 10 adults completed the WLP. Significant reductions were seen in total fat percentage (% fat, nontrunk fat, (NTF, and trunk fat (TF from base to 3 m and 6 M (p≤0.05. The FLI were reduced at 3 M and 6 M for males and 6 M for females. Total body fat and body weight predicted the FLI in both sexes. Conclusions. LEP and FLI reductions following 6 M of WLP were achieved independent of sOB-r changes. We also demonstrate that the FLI can be predicted noninvasively through total fat mass and body weight in kilograms.

A CANDIDATE FOR THE MOST LUMINOUS OB ASSOCIATION IN THE GALAXY

International Nuclear Information System (INIS)

Rahman, Mubdi; Matzner, Christopher; Moon, Dae-Sik

2011-01-01

The Milky Way harbors giant H II regions, which may be powered by star complexes more luminous than any known Galactic OB association. Being across the disk of the Galaxy, however, these brightest associations are severely extinguished and confused. We present a search for one such association toward the most luminous H II region in the recent catalog by Murray and Rahman, which, at ∼9.7 kpc, has a recombination rate of ∼7 x 10 51 s -1 . Prior searches have identified only small-scale clustering around the rim of this shell-like region, but the primary association has not previously been identified. We apply a near-infrared color selection and find an overdensity of point sources toward its southern central part. The colors and magnitudes of these excess sources are consistent with O- and early B-type stars at extinctions 0.96 K < 1.2, and they are sufficiently numerous (406 ± 102 after subtraction of field sources) to ionize the surrounding H II region, making this a candidate for the most luminous OB association in the Galaxy. We reject an alternate theory, in which the apparent excess is caused by localized extinction, as inconsistent with source demographics.

Discursos sobre la identidad como recurso adaptativo entre inmigrantes colombianos en Europa

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Gregorio Hernández Pulgarín

2016-01-01

Full Text Available Este artículo busca comprender el papel de los discursos que integran la identidad nacional en el proceso de adaptación en condiciones límite de inmigrantes colom - bianos en Europa. El abordaje, parte de un estudio etnográfico de colombianos inmigrantes por razones económicas en Bordeaux, Francia y Sevilla, España en di - ferentes períodos, de 2006 a 2012, y de la aplicación de entrevistas a migrantes colombianos en ambos países, retornados a Pereira, Colombia. Los resultados ob - tenidos muestran que en las situaciones límite, los inmigrantes colombianos suelen responder a los retos del proceso de adaptación, basados en discursos sobre la iden - tidad nacional que producen un efecto performativo con consecuencias favorables para la concepción de sí mismos, para la adaptación a las circunstancias adversas y para continuar el proyecto migratorio.

Distribution of the P2X2 receptor and chemical coding in ileal enteric neurons of obese male mice (ob/ob)

Science.gov (United States)

Mizuno, Márcia Sanae; Crisma, Amanda Rabello; Borelli, Primavera; Schäfer, Bárbara Tavares; Silveira, Mariana Póvoa; Castelucci, Patricia

2014-01-01

AIM: To investigate the colocalization, density and profile of neuronal areas of enteric neurons in the ileum of male obese mice. METHODS: The small intestinal samples of male mice in an obese group (OG) (C57BL/6J ob/ob) and a control group (CG) (+/+) were used. The tissues were analyzed using a double immunostaining technique for immunoreactivity (ir) of the P2X2 receptor, nitric oxide synthase (NOS), choline acetyl transferase (ChAT) and calretinin (Calr). Also, we investigated the density and profile of neuronal areas of the NOS-, ChAT- and Calr-ir neurons in the myenteric plexus. Myenteric neurons were labeled using an NADH-diaphorase histochemical staining method. RESULTS: The analysis demonstrated that the P2X2 receptor was expressed in the cytoplasm and in the nuclear and cytoplasmic membranes only in the CG. Neuronal density values (neuron/cm2) decreased 31% (CG: 6579 ± 837; OG: 4556 ± 407) and 16.5% (CG: 7796 ± 528; OG: 6513 ± 610) in the NOS-ir and calretinin-ir neurons in the OG, respectively (P < 0.05). Density of ChAT-ir (CG: 6200 ± 310; OG: 8125 ± 749) neurons significantly increased 31% in the OG (P < 0.05). Neuron size studies demonstrated that NOS, ChAT, and Calr-ir neurons did not differ significantly between the CG and OG groups. The examination of NADH-diaphorase-positive myenteric neurons revealed an overall similarity between the OG and CG. CONCLUSION: Obesity may exert its effects by promoting a decrease in P2X2 receptor expression and modifications in the density of the NOS-ir, ChAT-ir and CalR-ir myenteric neurons. PMID:25320527

Not all stars form in clusters - measuring the kinematics of OB associations with Gaia

Science.gov (United States)

Ward, Jacob L.; Kruijssen, J. M. Diederik

2018-04-01

It is often stated that star clusters are the fundamental units of star formation and that most (if not all) stars form in dense stellar clusters. In this monolithic formation scenario, low-density OB associations are formed from the expansion of gravitationally bound clusters following gas expulsion due to stellar feedback. N-body simulations of this process show that OB associations formed this way retain signs of expansion and elevated radial anisotropy over tens of Myr. However, recent theoretical and observational studies suggest that star formation is a hierarchical process, following the fractal nature of natal molecular clouds and allowing the formation of large-scale associations in situ. We distinguish between these two scenarios by characterizing the kinematics of OB associations using the Tycho-Gaia Astrometric Solution catalogue. To this end, we quantify four key kinematic diagnostics: the number ratio of stars with positive radial velocities to those with negative radial velocities, the median radial velocity, the median radial velocity normalized by the tangential velocity, and the radial anisotropy parameter. Each quantity presents a useful diagnostic of whether the association was more compact in the past. We compare these diagnostics to models representing random motion and the expanding products of monolithic cluster formation. None of these diagnostics show evidence of expansion, either from a single cluster or multiple clusters, and the observed kinematics are better represented by a random velocity distribution. This result favours the hierarchical star formation model in which a minority of stars forms in bound clusters and large-scale, hierarchically structured associations are formed in situ.

Methanobactin from Methylocystis sp. strain SB2 affects gene expression and methane monooxygenase activity in Methylosinus trichosporium OB3b.

Science.gov (United States)

Farhan Ul-Haque, Muhammad; Kalidass, Bhagyalakshmi; Vorobev, Alexey; Baral, Bipin S; DiSpirito, Alan A; Semrau, Jeremy D

2015-04-01

Methanotrophs can express a cytoplasmic (soluble) methane monooxygenase (sMMO) or membrane-bound (particulate) methane monooxygenase (pMMO). Expression of these MMOs is strongly regulated by the availability of copper. Many methanotrophs have been found to synthesize a novel compound, methanobactin (Mb), that is responsible for the uptake of copper, and methanobactin produced by Methylosinus trichosporium OB3b plays a key role in controlling expression of MMO genes in this strain. As all known forms of methanobactin are structurally similar, it was hypothesized that methanobactin from one methanotroph may alter gene expression in another. When Methylosinus trichosporium OB3b was grown in the presence of 1 μM CuCl2, expression of mmoX, encoding a subunit of the hydroxylase component of sMMO, was very low. mmoX expression increased, however, when methanobactin from Methylocystis sp. strain SB2 (SB2-Mb) was added, as did whole-cell sMMO activity, but there was no significant change in the amount of copper associated with M. trichosporium OB3b. If M. trichosporium OB3b was grown in the absence of CuCl2, the mmoX expression level was high but decreased by several orders of magnitude if copper prebound to SB2-Mb (Cu-SB2-Mb) was added, and biomass-associated copper was increased. Exposure of Methylosinus trichosporium OB3b to SB2-Mb had no effect on expression of mbnA, encoding the polypeptide precursor of methanobactin in either the presence or absence of CuCl2. mbnA expression, however, was reduced when Cu-SB2-Mb was added in both the absence and presence of CuCl2. These data suggest that methanobactin acts as a general signaling molecule in methanotrophs and that methanobactin "piracy" may be commonplace. Copyright © 2015, American Society for Microbiology. All Rights Reserved.

Evaluating the probiotic and therapeutic potentials of Saccharomyces cerevisiae strain (OBS2) isolated from fermented nectar of toddy palm.

Science.gov (United States)

Srinivas, Banoth; Rani, Ganapathiwar Swarupa; Kumar, Bhukya Kiran; Chandrasekhar, Banoth; Krishna, Kommalapati Vamsi; Devi, Tangutur Anjana; Bhima, Bhukya

2017-12-01

The purpose of this study is to evaluate the probiotic characteristics of 15 yeast strains isolated from nectar of toddy palm. Initially, the collected samples were inoculated on yeast extract peptone dextrose agar plates and the colonies so obtained were culturally and morphologically characterized. Commercial probiotic yeast, Saccharomyces boulardii served as the control in these experiments. Of the 15 yeast strains, the isolates that were resistant to antibiotics and worked synergistically with other cultures were considered for further evaluation. Selected isolates were evaluated in vitro for tolerance to simulated gastrointestinal conditions such as temperature, pH, bile and gastric juice. Further the yeast isolates were evaluated for their pathogenicity and adherence to intestinal epithelial cells. The 2 yeast isolates with efficient probiotic properties were finally characterized by sequencing their 5.8 S rRNA and partial sequences of internal transcribed spacer 1 and 2. The sequences were BLAST searched in the National Center for Biotechnology Information, nucleic acid database for sequence similarity of organisms and phylogenetic evolutionary analysis was carried out. Based on maximum similarity of basic local alignment search tool results, organisms were characterized as Pichia kudriavzevii OBS1 (100%) and Saccharomyces cerevisiae OBS2 (96%) and sequences were finally deposited in the GenBank data library. Among these two isolates, S. cerevisiae OBS2 displayed slight/moderate antioxidant and anticancer property. Hence, strain OBS2 can be utilized and explored as a potential probiotic for therapeutic applications.

Leptin receptor (Ob-R) mRNA expression and serum leptin concentration in patients with colorectal and metastatic colorectal cancer

Energy Technology Data Exchange (ETDEWEB)

Erkasap, N.; Ozkurt, M. [Department of Physiology, Osmangazi University Medical Faculty, Meselik, Eskisehir (Turkey); Erkasap, S.; Yasar, F. [Department of General Surgery, Osmangazi University Medical Faculty, Meselik, Eskisehir (Turkey); Uzuner, K. [Department of Physiology, Osmangazi University Medical Faculty, Meselik, Eskisehir (Turkey); Ihtiyar, E. [Department of General Surgery, Osmangazi University Medical Faculty, Meselik, Eskisehir (Turkey); Uslu, S.; Kara, M. [Department of Biochemistry, Osmangazi University Medical Faculty, Meselik, Eskisehir (Turkey); Bolluk, O. [Department of Biostatistics, Osmangazi University Medical Faculty, Meselik, Eskisehir (Turkey)

2013-03-19

The objective of the present study was to investigate the effect of leptin on the progression of colorectal carcinoma to metastatic disease by analyzing the serum leptin concentration and Ob-R gene expression in colon cancer tissues. Tissue samples were obtained from 31 patients who underwent surgical resection for colon (18 cases) and metastatic colon (13 cases) cancer. Serum leptin concentration was determined by an enzyme-linked immunosorbent assay (ELISA) and Ob-R mRNA expression by real-time polymerase chain reaction (RT-PCR) for both groups. ELISA data were analyzed by the Student t-test and RT-PCR data were analyzed by the Mann-Whitney U-test. RT-PCR results demonstrated that mRNA expression of Ob-R in human metastatic colorectal cancer was higher than in local colorectal cancer tissues. On the other hand, mean serum leptin concentration was significantly higher in local colorectal cancer patients compared to patients with metastatic colorectal cancer. The results of the present study suggest a role for leptin in the progression of colon cancer to metastatic disease without weight loss. In other words, significantly increased Ob-R mRNA expression and decreased serum leptin concentration in patients with metastatic colon cancer indicate that sensitization to leptin activity may be a major indicator of metastasis to the colon tissue and the determination of leptin concentration and leptin gene expression may be used to aid the diagnosis.

Leptin receptor (Ob-R) mRNA expression and serum leptin concentration in patients with colorectal and metastatic colorectal cancer

International Nuclear Information System (INIS)

Erkasap, N.; Ozkurt, M.; Erkasap, S.; Yasar, F.; Uzuner, K.; Ihtiyar, E.; Uslu, S.; Kara, M.; Bolluk, O.

2013-01-01

The objective of the present study was to investigate the effect of leptin on the progression of colorectal carcinoma to metastatic disease by analyzing the serum leptin concentration and Ob-R gene expression in colon cancer tissues. Tissue samples were obtained from 31 patients who underwent surgical resection for colon (18 cases) and metastatic colon (13 cases) cancer. Serum leptin concentration was determined by an enzyme-linked immunosorbent assay (ELISA) and Ob-R mRNA expression by real-time polymerase chain reaction (RT-PCR) for both groups. ELISA data were analyzed by the Student t-test and RT-PCR data were analyzed by the Mann-Whitney U-test. RT-PCR results demonstrated that mRNA expression of Ob-R in human metastatic colorectal cancer was higher than in local colorectal cancer tissues. On the other hand, mean serum leptin concentration was significantly higher in local colorectal cancer patients compared to patients with metastatic colorectal cancer. The results of the present study suggest a role for leptin in the progression of colon cancer to metastatic disease without weight loss. In other words, significantly increased Ob-R mRNA expression and decreased serum leptin concentration in patients with metastatic colon cancer indicate that sensitization to leptin activity may be a major indicator of metastasis to the colon tissue and the determination of leptin concentration and leptin gene expression may be used to aid the diagnosis

Leptin receptor (Ob-R mRNA expression and serum leptin concentration in patients with colorectal and metastatic colorectal cancer

Directory of Open Access Journals (Sweden)

N. Erkasap

Full Text Available The objective of the present study was to investigate the effect of leptin on the progression of colorectal carcinoma to metastatic disease by analyzing the serum leptin concentration and Ob-R gene expression in colon cancer tissues. Tissue samples were obtained from 31 patients who underwent surgical resection for colon (18 cases and metastatic colon (13 cases cancer. Serum leptin concentration was determined by an enzyme-linked immunosorbent assay (ELISA and Ob-R mRNA expression by real-time polymerase chain reaction (RT-PCR for both groups. ELISA data were analyzed by the Student t-test and RT-PCR data were analyzed by the Mann-Whitney U-test. RT-PCR results demonstrated that mRNA expression of Ob-R in human metastatic colorectal cancer was higher than in local colorectal cancer tissues. On the other hand, mean serum leptin concentration was significantly higher in local colorectal cancer patients compared to patients with metastatic colorectal cancer. The results of the present study suggest a role for leptin in the progression of colon cancer to metastatic disease without weight loss. In other words, significantly increased Ob-R mRNA expression and decreased serum leptin concentration in patients with metastatic colon cancer indicate that sensitization to leptin activity may be a major indicator of metastasis to the colon tissue and the determination of leptin concentration and leptin gene expression may be used to aid the diagnosis.

Hard X-ray Flux from Low-Mass Stars in the Cygnus OB2 Association

Science.gov (United States)

Caramazza, M.; Drake, J. J.; Micela, G.; Flaccomio, E.

2009-05-01

We investigate the X-ray emission in the 20-40 keV band expected from the flaring low-mass stellar population in Cygnus OB2 assuming that the observed soft X-ray emission is due to a superposition of flares and that the ratio of hard X-ray to soft X-ray emission is described by a scaling found for solar flares by Isola and co-workers. We estimate a low-mass stellar hard X-ray flux in the 20-40 keV band in the range ~7×1031-7×1033 erg/s and speculate the limit of this values. Hard X-ray emission could lie at a level not much below the current observed flux upper limits for Cygnus OB2. Simbol-X, with its broad energy band (10-100 keV) and its sensitivity should be able to detect this emission and would provide insights into the hard X-ray production of flares on pre-main sequence stars.

BOREAS TF-8 NSA-OJP and SSA-OBS Ceilometer Data

Science.gov (United States)

Moore, Kathleen E.; Hall, Forrest G. (Editor); Huemmrich, Karl (Editor); Fitzjarrald, David R.

2000-01-01

The BOREAS TF-8 team used ceilometers to collect data on the fraction of the sky covered with clouds and the cloud height. Included with these data is the surface-based lifting condensation level, derived from temperature and humidity values acquired at the flux tower at the NSA-OJP site. Ceilo-meter data were collected at the NSA-OJP site in 1994 and at the NSA-OJP and SSA-OBS sites in 1996. The data are available in tabular ASCII files. The data files are available on a CD-ROM (see document number 20010000884).

Kinetics of Chlorinated Hydrocarbon Degradation by Methylosinus trichosporium OB3b and Toxicity of Trichloroethylene

NARCIS (Netherlands)

Oldenhuis, Roelof; Oedzes, Johannes Y.; Waarde, Jacob J. van der; Janssen, Dick B.

The kinetics of the degradation of trichloroethylene (TCE) and seven other chlorinated aliphatic hydrocarbons by Methylosinus trichosporium OB3b were studied. All experiments were performed with cells grown under copper stress and thus expressing soluble methane monooxygenase. Compounds that were

Degradation of Chlorinated Aliphatic Hydrocarbons by Methylosinus trichosporium OB3b Expressing Soluble Methane Monooxygenase

NARCIS (Netherlands)

Oldenhuis, R.; Vink, Ruud L.J.M.; Janssen, D. B.; Witholt, B.

1989-01-01

Degradation of trichloroethylene (TCE) by the methanotrophic bacterium Methylosinus trichosporium OB3b was studied by using cells grown in continuous culture. TCE degradation was a strictly cometabolic process, requiring the presence of a cosubstrate, preferably formate, and oxygen. M. trichosporium

ObsPack: a framework for the preparation, delivery, and attribution of atmospheric greenhouse gas data

NARCIS (Netherlands)

Masarie, K. A.; Peters, W.; Jacobson, A. R.; Tans, P. P.

2014-01-01

Observation Package (ObsPack) is a framework designed to bring together atmospheric greenhouse gas observations from a variety of sampling platforms, prepare them with specific applications in mind, and package and distribute them in a self-consistent and well-documented product. Data products

ObsPack: a framework for the preparation, delivery, and attribution of atmospheric greenhouse gas measurements

NARCIS (Netherlands)

Masarie, K. A.; Peters, W.; Jacobson, A. R.; Tans, P. P.

2014-01-01

Observation Package (ObsPack) is a framework designed to bring together atmospheric greenhouse gas observations from a variety of sampling platforms, prepare them with specific applications in mind, and package and distribute them in a self-consistent and well-documented product. Data products

Release and transport of artificial radionuclides from nuclear weapons related activities in the Ob River, Siberia over the course of the nuclear age

International Nuclear Information System (INIS)

Sayles, F.L.; Kenna, T.C.; Livingston, H.D.

1999-01-01

Studies of sediment cores from lakes on the flood plain of the Ob River, Siberia have been used to develop a history of the release, transport, and deposition of artificial radionuclides related to the development and testing of nuclear weapons over the duration of the nuclear age (∼1950 to the present) in this major Arctic river system. The Ob is of particular importance in this regard as two of the former Soviet Union's major weapons production plants, Mayak and Tomsk-7, and the Semipalatinsk test site are located within the Ob drainage basin. Accidents and intentional releases of radionuclides at both plants have been substantial, raising the issue of transport throughout this extensive river system as well as delivery to the Arctic Ocean. Our studies have included determining sediment profiles of 239,240 Pu, 137 Cs, and the natural nuclide 210 Pb and its parent 226 Ra in a number of cores from the Ob delta, as well as analysis of 239 Pu, 240 Pu, and 237 Np. The latter provide sensitive measures of the presence of non-fallout materials derived from weapons production activities

New Partner Recruitment to Rural Versus Urban Ob-Gyn Practices

Directory of Open Access Journals (Sweden)

Michael F. Fialkow

2017-09-01

Full Text Available Purpose: The purpose of this pilot study was to investigate the recruitment efforts of practicing obstetrics and gynecology (ob-gyns from rural and urban practices. Method: The authors surveyed practicing ob-gyns from 5 states in the Pacific Northwest in 2016 about their background, practice setting, practice profile, partner recruitment, and retention. Results: Seventy-three patients completed the study (53.2% response rate. Thirty-seven percent of respondents work in an urban practice and 43% have a rural practice, with the remainder in a suburban setting. A majority of the respondents attempted to recruit a new partner in the past 5 years. Respondents were most interested in experience and diversity in new recruits. Urban respondents, however, were more interested in hiring those with specialized skills (χ 2 = 7.842, P = .02 than rural providers who were more interested in partners familiar with their community (χ 2 = 7.153, P = .03. Reasons most often cited to leave their practice were reimbursement, limited social/marital options, and workload, other than rural providers who more often also cited lack of access to specialty care (χ 2 = 13.256, P = .001. Rural providers were more likely to cite marital and family status as an advantage to recruitment, whereas urban and suburban providers were more often neutral. Conclusions: Reduced access to care has led to significant health disparities for women living in rural communities. Understanding which providers are most likely to be successful in these settings might help preserve access as our health-care systems evolves.

Analysis of interstellar extinction towards the hypergiant Cyg OB2 No. 12

Science.gov (United States)

Maryeva, O. V.; Chentsov, E. L.; Goranskij, V. P.; Karpov, S. V.

The Cyg OB2 stellar association hosts an entire zoo of unique objects, and among them -- an enigmatic star Cyg OB2 No. 12 (Schulte 12, MT 304). MT 304 is enigmatic not only due to its highest luminosity (according to various estimates, it is one of the brightest stars in the Galaxy), but also because its reddening is anomalously large, greater than the mean reddening in the association. To explain the nature of anomalous reddening (AV≃ 10 mag) of MT 304, we carried out spectrophotometric observations of 25 stars located in its vicinity. We mapped interstellar extinction within the 2.5 arcmin radius and found it to increase towards MT 304. According to our results, the two most reddened stars in the association after MT 304 are J203240.35+411420.1 and J203239.90+411436.2, both located about 15 arcsec from it. Interstellar extinction AV towards these stars is about 9 mag. Our results favor the hypothesis of the circumstellar nature of reddening excess. In the second part of the paper we present the results of our modeling of MT 282 (B1 IV) and MT 343 (B1 V), which belong to the older population of the association and have ages greater than 10 Myr.

Effect of chlorinated ethene conversion on viability and activity of Methylosinus trichosporium OB3b

NARCIS (Netherlands)

van Hylckama Vlieg, Johan E.T.; Koning, Wim de; Janssen, Dick B.

1997-01-01

The effect of transformation of chlorinated ethenes on the cell viability of Methylosinus trichosporium OB3b was investigated. A comparison of the loss of viability with the decrease in transformation rates shelved that for the monooxygenase-mediated transformation of all chlorinated ethenes except

Dropping Probability Reduction in OBS Networks: A Simple Approach

KAUST Repository

Elrasad, Amr

2016-08-01

In this paper, we propose and derive a slotted-time model for analyzing the burst blocking probability in Optical Burst Switched (OBS) networks. We evaluated the immediate and delayed signaling reservation schemes. The proposed model compares the performance of both just-in-time (JIT) and just-enough-time (JET) signaling protocols associated with of void/non-void filling link scheduling schemes. It also considers none and limited range wavelength conversions scenarios. Our model is distinguished by being adaptable to different offset-time and burst length distributions. We observed that applying a limited range of wavelength conversion, burst blocking probability is reduced by several orders of magnitudes and yields a better burst delivery ratio compared with full wavelength conversion.

A Multi-Fiber Spectroscopic Search for Low-mass Young Stars in Orion OB1

Science.gov (United States)

Loerincs, Jacqueline; Briceno, Cesar; Calvet, Nuria; Mateo, Mario L.; Hernandez, Jesus

2017-01-01

We present here results of a low resolution spectroscopic followup of candidate low-mass pre-main sequence stars in the Orion OB1 association. Our targets were selected from the CIDA Variability Survey of Orion (CVSO), and we used the Michigan/Magellan Fiber Spectrograph (M2FS) on the Magellan Clay 6.5m telescope to obtain spectra of 500 candidate T Tauri stars distributed in seven 0.5 deg diameter fields, adding to a total area of ~5.5 deg2. We identify young stars by looking at the distinctive Hα 6563 Å emission and Lithium Li I 6707 Å absorption features characteristic of young low mass pre-main sequence stars. Furthermore, by measuring the strength of their Hα emission lines, confirmed T Tauri stars can be classified as either Classical T Tauris (CTTS) or Weak-line T Tauris (WTTS), which give indication of whether the star is actively accreting material from a gas and dust disk surrounding the star, which may be the precursor of a planetary system. We confirm a total of 90 T Tauri stars, of which 50% are newly identified young members of Orion; out of the 49 new detections,15 are accreting CTTS, and of these all but one are found in the OB1b sub-region. This result is in line with our previous findings that this region is much younger than the more extended Orion OB1a sub-association. The M2FS results add to our growing census of young stars in Orion, that is allowing us to characterize in a systematic and consistent way the distribution of stellar ages across the entire complex, in order to building a complete picture of star formation in this, one of nearest most active sites of star birth.

An anomalous extinction law in the Cep OB3b young cluster: Evidence for dust processing during gas dispersal

International Nuclear Information System (INIS)

Allen, Thomas S.; Prchlik, Jakub J.; Megeath, S. Thomas; Gutermuth, Robert A.; Pipher, Judith L.; Naylor, Tim; Jeffries, R. D.

2014-01-01

We determine the extinction law through Cep OB3b, a young cluster of 3000 stars undergoing gas dispersal. The extinction is measured toward 76 background K giants identified with MMT/Hectospec spectra. Color excess ratios were determined toward each of the giants using V and R photometry from the literature, g, r, i, and z photometry from the Sloan Digital Sky Survey and J, H, and K s photometry from the Two Micron All Sky Survey. These color excess ratios were then used to construct the extinction law through the dusty material associated with Cep OB3b. The extinction law through Cep OB3b is intermediate between the R V = 3.1 and R V = 5 laws commonly used for the diffuse atomic interstellar medium and dense molecular clouds, respectively. The dependence of the extinction law on line-of-sight A V is investigated and we find the extinction law becomes shallower for regions with A V > 2.5 mag. We speculate that the intermediate dust law results from dust processing during the dispersal of the molecular cloud by the cluster.

An anomalous extinction law in the Cep OB3b young cluster: Evidence for dust processing during gas dispersal

Energy Technology Data Exchange (ETDEWEB)

Allen, Thomas S.; Prchlik, Jakub J.; Megeath, S. Thomas [University of Toledo, Ritter Astrophysical Observatory, Department of Physics and Astronomy, Toledo, OH 43606 (United States); Gutermuth, Robert A. [Five College Astronomy Department, Smith College, Northampton, MA 01063 (United States); Pipher, Judith L. [Department of Physics and Astronomy, University of Rochester, Rochester, NY 14627 (United States); Naylor, Tim [School of Physics, University of Exeter, Exeter, UK EX4 4QL (United Kingdom); Jeffries, R. D. [Astrophysics Group, School of Physical and Geographical Sciences, Keele University, Keele, Staffordshire, UK ST5 5BG (United Kingdom)

2014-05-10

We determine the extinction law through Cep OB3b, a young cluster of 3000 stars undergoing gas dispersal. The extinction is measured toward 76 background K giants identified with MMT/Hectospec spectra. Color excess ratios were determined toward each of the giants using V and R photometry from the literature, g, r, i, and z photometry from the Sloan Digital Sky Survey and J, H, and K{sub s} photometry from the Two Micron All Sky Survey. These color excess ratios were then used to construct the extinction law through the dusty material associated with Cep OB3b. The extinction law through Cep OB3b is intermediate between the R{sub V} = 3.1 and R{sub V} = 5 laws commonly used for the diffuse atomic interstellar medium and dense molecular clouds, respectively. The dependence of the extinction law on line-of-sight A{sub V} is investigated and we find the extinction law becomes shallower for regions with A{sub V} > 2.5 mag. We speculate that the intermediate dust law results from dust processing during the dispersal of the molecular cloud by the cluster.

THE MASSIVE STAR-FORMING REGION CYGNUS OB2. II. INTEGRATED STELLAR PROPERTIES AND THE STAR FORMATION HISTORY

International Nuclear Information System (INIS)

Wright, N. J.; Drake, J. J.; Drew, J. E.; Vink, J. S.

2010-01-01

Cygnus OB2 is the nearest example of a massive star-forming region (SFR), containing over 50 O-type stars and hundreds of B-type stars. We have analyzed the properties of young stars in two fields in Cyg OB2 using the recently published deep catalog of Chandra X-ray point sources with complementary optical and near-IR photometry. Our sample is complete to ∼1 M sun (excluding A- and B-type stars that do not emit X-rays), making this the deepest study of the stellar properties and star formation history in Cyg OB2 to date. From Siess et al. isochrone fits to the near-IR color-magnitude diagram, we derive ages of 3.5 +0.75 -1.0 and 5.25 +1.5 -1.0 Myr for sources in the two fields, both with considerable spreads around the pre-main-sequence isochrones. The presence of a stellar population somewhat older than the present-day O-type stars, also fits in with the low fraction of sources with inner circumstellar disks (as traced by the K-band excess) that we find to be very low, but appropriate for a population of age ∼5 Myr. We also find that the region lacks a population of highly embedded sources that is often observed in young SFRs, suggesting star formation in the vicinity has declined. We measure the stellar mass functions (MFs) in this limit and find a power-law slope of Γ = -1.09 ± 0.13, in good agreement with the global mean value estimated by Kroupa. A steepening of the slope at higher masses is observed and suggested as due to the presence of the previous generation of stars that have lost their most massive members. Finally, combining our MF and an estimate of the radial density profile of the association suggests a total mass of Cyg OB2 of ∼3 x 10 4 M sun , similar to that of many of our Galaxy's most massive SFRs.

WNIN/GR-Ob - an insulin-resistant obese rat model from inbred WNIN strain.

Science.gov (United States)

Harishankar, N; Vajreswari, A; Giridharan, N V

2011-09-01

WNIN/GR-Ob is a mutant obese rat strain with impaired glucose tolerance (IGT) developed at the National Institute of Nutrition (NIN), Hyderabad, India, from the existing 80 year old Wistar rat (WNIN) stock colony. The data presented here pertain to its obese nature along with IGT trait as evidenced by physical, physiological and biochemical parameters. The study also explains its existence, in three phenotypes: homozygous lean (+/+), heterozygous carrier (+/-) and homozygous obese (-/-). Thirty animals (15 males and 15 females) from each phenotype (+/+, +/-, -/-) and 24 lean and obese (6 males and 6 females) rats were taken for growth and food intake studies respectively. Twelve adult rats from each phenotype were taken for body composition measurement by total body electrical conductivity (TOBEC); 12 rats of both genders from each phenotype at different ages were taken for clinical chemistry parameters. Physiological indices of insulin resistance were calculated according to the homeostasis model assessment for insulin resistance (HOMA-IR) and also by studying U¹⁴C 2-deoxy glucose uptake (2DG). WNINGR-Ob mutants had high growth, hyperphagia, polydipsia, polyurea, glycosuria, and significantly lower lean body mass, higher fat mass as compared with carrier and lean rats. These mutants, at 50 days of age displayed abnormal response to glucose load (IGT), hyperinsulinaemia, hypertriglyceridaemia, hypercholesterolaemia and hyperleptinaemia. Basal and insulin-stimulated glucose uptakes by diaphragm were significantly decreased in obese rats as compared with lean rats. Obese rats of the designated WNIN/GR-Ob strain showed obesity with IGT, as adjudged by physical, physiological and biochemical indices. These indices varied among the three phenotypes, being lowest in lean, highest in obese and intermediate in carrier phenotypes thereby suggesting that obesity is inherited as autosomal incomplete dominant trait in this strain. This mutant obese rat model is easy to

[Modeling of Processes of Migration and Accumulation of Radionuclides in Freshwater Ecosystems by the Example of the Samson, Lev, Vandras Rivers Related to the Ob-Irtysh River Basin].

Science.gov (United States)

Trapeznikov, A V; Korzhavin, A V; Trapeznikova, V N; Nikolkin, V N

2016-01-01

Mathematical models of horizontal distribution and migration of radionuclides are presented in water and floodplain soils of the Samson-Lev-Vandras river system related to the Ob-Irtysh river basin. Integral inventory of radionuclides in the main components of the river ecosystems is calculated. The estimated annual discharge of radionuclides from the Vandras river to the Great Salym river is given. The effect of the removal of man-made radionuclides in the Samson, Lev, Vandras rivers on radioactive contamination of the Ob-Irtysh river system is shown in comparison with the Techa river, that also belongs to the Ob-Irtysh river basin. Despite the presence of an additional radioactive contamination of the Samson floodplain, the transfer of radioactive substances in the Samson, Lev, Vandras rivers has a much smaller impact on the contamination of the Ob-Irtysh river system, compared to the Techa river, prone to a large-scale radioactive contamination.

Analytical model of a burst assembly algorithm for the VBR in the OBS networks

International Nuclear Information System (INIS)

Shargabi, M.A.A.; Mellah, H.; Abid, A.

2008-01-01

This paper presents a proposed analytical model for the number of bursts aggregated in a period of time in OBS networks. The model considers the case of VBR traffic with two different sending rates, which are SCR and PCR. The model is validated using extensive simulations. Where results from simulations are in total agreement with the results obtained by the proposed model. (author)

La binaria LSS 3074 y su entorno: ?`una nueva asociación OB?

Science.gov (United States)

Niemela, V.; Morrell, N.; Corti, M.

En este trabajo presentamos un nuevo análisis orbital de LSS~3074, junto con tipos espectrales y velocidades radiales de estrellas que podrían constituir con ella una nueva asociación OB. La estrella O4f LSS3074 fue descubierta como binaria espectroscópica de corto período y líneas dobles por Morrell & Niemela (1990, ASP Conf. Ser. 7, 57). Posteriormente, Haefner et~al.(1994, IBVS 3969) encontraron variaciones fotométricas, estimando una inclinación orbital entre 50o y 55o. Teniendo en cuenta la importancia de obtener valores empíricos para las masas de estrellas O tempranas, y considerando la gran dispersión existente entre los valores observados y su discrepancia con los predichos por los modelos teóricos, hemos obtenido nuevas observaciones espectroscópicas de este sistema, con el propósito de mejorar los elementos orbitales derivados en la solución preliminar. Además, como las estrellas O tempranas suelen formar parte de cúmulos y asociaciones OB, hemos llevado a cabo una investigación espectroscópica de varias estrellas tempranas que podrían estar físicamente relacionadas con LSS~3074.

Triggering risk factors of the burnout syndrome in OB/GYN physicians from a reference public university of Brazil.

Science.gov (United States)

Ferreira Bortoletti, Fátima; Teresa Benevides-Pereira, Ana Maria; Vasconcellos, Esdras Guerreiro; Siqueira, José Oliveira; Araujo Júnior, Edward; Nardozza, Luciano Marcondes Machado; Sebastiani, Ricardo Werner; Moron, Antonio Fernandes

2012-01-01

Objective. To identify the risk factors to the development of Burnout Syndrome in Ob/Gyn Brazilian physicians in four dimensions: emotional exhaustion (EE), professional repression (PR), dehumanization (De), and emotional distancing (EmD). Methods. A prospective cross-sectional study was realized with 48 Ob/Gyn physicians (12 lecturers, 12 attending physicians, 12 medical residents, and 12 graduate students) from Department of Obstetrics, São Paulo Federal University (UNIFESP). We used a sociodemographic questionnaire focusing on the activities (administrative, educational, healthcare, and research). We applied a Burnout Syndrome Inventory (BSI) composed of two parts: triggering factors (ISB1) and the Burnout Syndrome (ISB2). The ISB1 is composed of two scales: positive organizational conditions (POC) and negative organizational conditions (NOC). The ISB2 is composed of four scales: EE, PR, De, and EmD. Results. We observed a rate below and above average to POC and NOC, respectively. The dimensions recorded a level above average to EE, an index at the upper limit of the average to De, a median index to EmD, and a median index to PR. Conclusions. The Ob/Gyn physicians are in an area of vulnerability for the development of Burnout Syndrome due to the high level of EE and De, associated with a median index of PR. The high rate of NOC contributes to the triggering of this scenery.

Reference values for serum leptin in healthy non-obese children and adolescents.

Science.gov (United States)

Lausten-Thomsen, Ulrik; Christiansen, Michael; Louise Hedley, Paula; Esmann Fonvig, Cilius; Stjernholm, Theresa; Pedersen, Oluf; Hansen, Torben; Holm, Jens-Christian

2016-11-01

Adipokines are biologically active, low-molecular weight peptides, which play a major role in metabolic homeostasis in humans. Leptin has gained increasing attention in pediatrics as a biomarker for various metabolic pathologies. Yet, its usefulness is hampered by the relative lack of reference values from pediatric settings. Accordingly, this study aims to evaluate serum concentrations of leptin, soluble leptin receptor (sOB-R), and free leptin index (FLI) in healthy Danish schoolchildren aged 6-18 years and subsequently to establish reference intervals across sex and age groups. A total of 1193 healthy, non-obese Danish schoolchildren (730 girls, 463 boys) aged 6-18 years (median 11.9) were examined by trained medical staff. Serum leptin and sOB-R concentrations in venous fasting blood samples were quantitated by immunoassay. Percentile curves of leptin, sOB-R, and free leptin index were calculated using the General Additive Model for Location Scale and Shape (GAMLSS). Significant age and sex-dependent differences in circulating leptin levels were found. In boys, the median leptin concentration for all ages combined was 3.35 μg/L (95%-interval: 0.71-22.47) and in girls, it was 9.89 ng/L (95%-interval: 2.06-41.49). For SOB-R, no sex-specific difference was found, and the median sOB-R concentration was 8.24 μg/L (IQR: 3.58-23.74; range: < 1.56-744.15). We demonstrated an age-dependent correlation with both serum leptin concentration and free leptin index with a gradual and significant increase in girls throughout childhood and adolescence and a significantly higher leptin concentration and free leptin index bell-shaped peak in early adolescence in boys.

On the Binary Nature of Massive Blue Hypergiants: High-resolution X-Ray Spectroscopy Suggests That Cyg OB2 12 is a Colliding Wind Binary

Energy Technology Data Exchange (ETDEWEB)

Oskinova, L. M.; Hamann, W.-R.; Shenar, T.; Sander, A. A. C.; Todt, H.; Hainich, R. [Institute for Physics and Astronomy, University Potsdam, D-14476 Potsdam (Germany); Huenemoerder, D. P. [Massachusetts Institute of Technology, Kavli Institute for Astrophysics and Space Research, 70 Vassar St., Cambridge, MA 02139 (United States); Ignace, R., E-mail: lida@astro.physik.uni-potsdam.de [Department of Physics and Astronomy, East Tennessee State University, Johnson City, TN 37663 (United States)

2017-08-10

The blue hypergiant Cyg OB2 12 (B3Ia{sup +}) is a representative member of the class of very massive stars in a poorly understood evolutionary stage. We obtained its high-resolution X-ray spectrum using the Chandra observatory. PoWR model atmospheres were calculated to provide realistic wind opacities and to establish the wind density structure. We find that collisional de-excitation is the dominant mechanism depopulating the metastable upper levels of the forbidden lines of the He-like ions Si xiv and Mg xii. Comparison between the model and observations reveals that X-ray emission is produced in a dense plasma, which could reside only at the photosphere or in a colliding wind zone between binary components. The observed X-ray spectra are well-fitted by thermal plasma models, with average temperatures in excess of 10 MK. The wind speed in Cyg OB2 12 is not high enough to power such high temperatures, but the collision of two winds in a binary system can be sufficient. We used archival data to investigate the X-ray properties of other blue hypergiants. In general, stars of this class are not detected as X-ray sources. We suggest that our new Chandra observations of Cyg OB2 12 can be best explained if Cyg OB2 12 is a colliding wind binary possessing a late O-type companion. This makes Cyg OB2 12 only the second binary system among the 16 known Galactic hypergiants. This low binary fraction indicates that the blue hypergiants are likely products of massive binary evolution during which they either accreted a significant amount of mass or already merged with their companions.

MUG-OBS - Multiparameter Geophysical Ocean Bottom System : a new instrumental approach to monitor earthquakes.

Science.gov (United States)

hello, yann; Charvis, Philippe; Yegikyan, Manuk; verfaillie, Romain; Rivet, Diane

2016-04-01

Real time monitoring of seismic activity is a major issue for early warning of earthquakes and tsunamis. It can be done using regional scale wired nodes, such as Neptune in Canada and in the U.S, or DONET in Japan. Another approach to monitor seismic activity at sea is to deploying repeatedly OBS array like during the amphibious Cascadia Initiative (four time 1-year deployments), the Japanese Pacific Array (broadband OBSs "ocean-bottom broadband dispersion survey" with 2-years autonomy), the Obsismer program in the French Lesser Antilles (eight time 6-months deployments) and the Osisec program in Ecuador (four time 6-months deployments). These autonomous OBSs are self-recovered or recovered using an ROV. These systems are costly including ship time, and require to recover the OBS before to start working on data. Among the most recent alternative we developed a 3/4 years autonomy ocean bottom system with 9 channels (?) allowing the acquisition of different seismic or environmental parameters. MUG-OBS is a free falling instrument rated down to 6000 m. The installation of the sensor is monitored by acoustic commands from the surface and a health bulletin with data checking is recovered by acoustic during the installation. The major innovation is that it is possible to recover the data any time on demand (regularly every 6-months or after a crisis) using one of the 6 data-shuttles released from the surface by acoustic command using a one day fast cruise boat of opportunity. Since sensors stayed at the same location for 3 years, it is a perfect tool to monitor large seismic events, background seismic activity and aftershock distribution. Clock, drift measurement and GPS localization is automatic when the shuttle reaches the surface. For remote areas, shuttles released automatically and a seismic events bulletin is transmitted. Selected data can be recovered by two-way Iridium satellite communication. After a period of 3 years the main station is self-recovered by

Search for OB stars running away from young star clusters. II. The NGC 6357 star-forming region

Science.gov (United States)

Gvaramadze, V. V.; Kniazev, A. Y.; Kroupa, P.; Oh, S.

2011-11-01

Dynamical few-body encounters in the dense cores of young massive star clusters are responsible for the loss of a significant fraction of their massive stellar content. Some of the escaping (runaway) stars move through the ambient medium supersonically and can be revealed via detection of their bow shocks (visible in the infrared, optical or radio). In this paper, which is the second of a series of papers devoted to the search for OB stars running away from young ( ≲ several Myr) Galactic clusters and OB associations, we present the results of the search for bow shocks around the star-forming region NGC 6357. Using the archival data of the Midcourse Space Experiment (MSX) satellite and the Spitzer Space Telescope, and the preliminary data release of the Wide-Field Infrared Survey Explorer (WISE), we discovered seven bow shocks, whose geometry is consistent with the possibility that they are generated by stars expelled from the young (~1-2 Myr) star clusters, Pismis 24 and AH03 J1725-34.4, associated with NGC 6357. Two of the seven bow shocks are driven by the already known OB stars, HD 319881 and [N78] 34. Follow-up spectroscopy of three other bow-shock-producing stars showed that they are massive (O-type) stars as well, while the 2MASS photometry of the remaining two stars suggests that they could be B0 V stars, provided that both are located at the same distance as NGC 6357. Detection of numerous massive stars ejected from the very young clusters is consistent with the theoretical expectation that star clusters can effectively lose massive stars at the very beginning of their dynamical evolution (long before the second mechanism for production of runaway stars, based on a supernova explosion in a massive tight binary system, begins to operate) and lends strong support to the idea that probably all field OB stars have been dynamically ejected from their birth clusters. A by-product of our search for bow shocks around NGC 6357 is the detection of three circular

Conversion of chlorinated propanes by Methylosinus trichosporium OB3b expressing soluble methane monooxygenase

OpenAIRE

Bosma, T.; Janssen, D.B.

1998-01-01

Chlorinated propanes are important pollutants that may show persistent behaviour in the environment. The biotransformation of 1-chloropropane, 1,2-dichloropropane, 1,3-dichloropropane and 1,2,3-trichloropropane was studied using resting cell suspensions of Methylosinus trichosporium OB3b expressing soluble methane monooxygenase. The transformation followed first-order kinetics. The rate constants were in the order 1-chloropropane > 1,3-dichloropropane > 1,2-dichloropropane > 1,2,3-trichloropr...

Trening za razvijanje občutka za števila in količine pri predšolskih otrocih s posebnimi potrebami

OpenAIRE

Kuplenk, Petra

2017-01-01

Tako otroci kot tudi odrasli se z matematiko srečujemo na vsakem koraku, pa naj bo to na poti v vrtec, službo ali pa pri delu doma. Matematika vsakodnevno vpliva na naše življenje in delo. Na delovnem mestu, v vrtcu, opažam vse večje težave otrok s posebnimi potrebami na področju razvoja občutka za števila in količine. V predšolskem obdobju je namreč nujno, da otroci razvijejo občutek za števila in količine, saj vsa nadaljnja matematična znanja temeljijo na usvojenih spretnostih. V empirič...

Circulating ghrelin, leptin, and soluble leptin receptor concentrations and cardiometabolic risk factors in a community-based sample.

Science.gov (United States)

Ingelsson, Erik; Larson, Martin G; Yin, Xiaoyan; Wang, Thomas J; Meigs, James B; Lipinska, Izabella; Benjamin, Emelia J; Keaney, John F; Vasan, Ramachandran S

2008-08-01

The conjoint effects and relative importance of ghrelin, leptin, and soluble leptin receptor (sOB-R), adipokines involved in appetite control and energy expenditure in mediating cardiometabolic risk, is unknown. The objective of the study was to study the cross-sectional relations of these adipokines to cardiometabolic risk factors in a community-based sample. We measured circulating ghrelin, leptin, and sOB-R in 362 participants (mean age 45 yr; 54% women) of the Framingham Third Generation Cohort. Body mass index, waist circumference (WC), blood pressure, lipid measures, fasting glucose, smoking, and metabolic syndrome (MetS) were measured. Ghrelin and leptin concentrations were significantly higher in women (P risk.

OB Stars and Cepheids From the Gaia TGAS Catalogue: Test of their Distances and Proper Motions

Directory of Open Access Journals (Sweden)

Bobylev Vadim V.

2017-12-01

Full Text Available We consider young distant stars from the Gaia TGAS catalog. These are 250 classical Cepheids and 244 OB stars located at distances up to 4 kpc from the Sun. These stars are used to determine the Galactic rotation parameters using both trigonometric parallaxes and proper motions of the TGAS stars. In this case the considered stars have relative parallax errors less than 200%. Following the well-known statistical approach, we assume that the kinematic parameters found from the line-of-sight velocities Vr are less dependent on errors of distances than the found from the velocity components Vl. From values of the first derivative of the Galactic rotation angular velocity ′0, found from the analysis of velocities Vr and Vl separately, the scale factor of distances is determined.We found that from the sample of Cepheids the scale of distances of the TGAS should be reduced by 3%, and from the sample of OB stars, on the contrary, the scale should be increased by 9%.

MODELING THE RADIO EMISSION FROM Cyg OB2 NO. 5: A QUADRUPLE SYSTEM?

International Nuclear Information System (INIS)

Kennedy, M.; Dougherty, S. M.; Fink, A.; Williams, P. M.

2010-01-01

Fifty observations at frequencies between 1.4 GHz and 43 GHz of the 6.6 day O6.5-7+O5.5-6 binary Cyg OB2 No. 5 using the Very Large Array over 20 years are re-examined. The aim is to determine the location and character of the previously detected variable radio emission. The radio emission from the system consists of a primary component that is associated with the binary, and a non-thermal source (NE), 0.''8 to the NE of the binary that has been ascribed to a wind-collision region (WCR) between the stellar winds of the binary and that of a B-type star (Star D) to the NE. Previous studies have not accounted for the potential contribution of NE to the total radio emission, most especially in observations where the primary and NE sources are not resolved as separate sources. NE shows no evidence of variation in 23 epochs where it is resolved separately from the primary radio component, demonstrating that the variable emission arises in the primary component. Since NE is non-variable, the radio flux from the primary can now be well determined for the first time, most especially in observations that do not resolve both the primary and NE components. The variable radio emission from the primary component has a period of 6.7 ± 0.3 years which is described by a simple model of a non-thermal source orbiting within the stellar wind envelope of the binary. Such a model implies the presence of a third, unresolved stellar companion (Star C) orbiting the 6.6 day binary with a period of 6.7 years and independent of Star D to the NE. The variable non-thermal emission arises from either a WCR between Star C and the binary system, or possibly from Star C directly. The model gives a mass-loss rate of 3.4 x 10 -5 M sun yr -1 for Cyg OB2 No. 5, unusually high for an Of supergiant and comparable to that of WR stars, and consistent with an unusually strong He I 1.083 μm emission line, also redolent of WR stars. An examination of radial velocity observations available from the

Carbenoxolone treatment ameliorated metabolic syndrome in WNIN/Ob obese rats, but induced severe fat loss and glucose intolerance in lean rats.

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Siva Sankara Vara Prasad Sakamuri

Full Text Available BACKGROUND: 11beta-hydroxysteroid dehydrogenase type 1 (11β-HSD1 regulates local glucocorticoid action in tissues by catalysing conversion of inactive glucocorticoids to active glucocorticoids. 11β-HSD1 inhibition ameliorates obesity and associated co-morbidities. Here, we tested the effect of 11β-HSD inhibitor, carbenoxolone (CBX on obesity and associated comorbidities in obese rats of WNIN/Ob strain, a new animal model for genetic obesity. METHODOLOGY/PRINCIPAL FINDINGS: Subcutaneous injection of CBX (50 mg/kg body weight or volume-matched vehicle was given once daily for four weeks to three month-old WNIN/Ob lean and obese rats (n = 6 for each phenotype and for each treatment. Body composition, plasma lipids and hormones were assayed. Hepatic steatosis, adipose tissue morphology, inflammation and fibrosis were also studied. Insulin resistance and glucose intolerance were determined along with tissue glycogen content. Gene expressions were determined in liver and adipose tissue. CBX significantly inhibited 11β-HSD1 activity in liver and adipose tissue of WNIN/Ob lean and obese rats. CBX significantly decreased body fat percentage, hypertriglyceridemia, hypercholesterolemia, insulin resistance in obese rats. CBX ameliorated hepatic steatosis, adipocyte hypertrophy, adipose tissue inflammation and fibrosis in obese rats. Tissue glycogen content was significantly decreased by CBX in liver and adipose tissue of obese rats. Severe fat loss and glucose- intolerance were observed in lean rats after CBX treatment. CONCLUSIONS/SIGNIFICANCE: We conclude that 11β-HSD1 inhibition by CBX decreases obesity and associated co-morbidities in WNIN/Ob obese rats. Our study supports the hypothesis that inhibition of 11β-HSD1 is a key strategy to treat metabolic syndrome. Severe fat loss and glucose -intolerance by CBX treatment in lean rats suggest that chronic 11β-HSD1 inhibition may lead to insulin resistance in normal conditions.

Réduire l'obésité chez les enfants au Mexique | CRDI - Centre de ...

International Development Research Centre (IDRC) Digital Library (Canada)

27 avr. 2016 ... ... le Mexique connaît une « transition nutritionnelle » sous l'effet des changements qui se sont produits en ce qui concerne le régime alimentaire, la nutrition et l'activité physique. Le surpoids et l'obésité sont des facteurs de risque pour les maladies chroniques comme le diabète et le cancer, sans compter ...

Association entre le travail par quarts et l’obésité chez les hommes dans le nord-est de l’Ontario

Directory of Open Access Journals (Sweden)

Anne Grundy

2017-01-01

Full Text Available Introduction : Même si certaines études suggèrent une association entre le travail par quarts et l’obésité, peu sont fondées sur la population ou tiennent compte de divers horaires de travail par quarts. L’obésité étant associée à plusieurs problèmes de santé chroniques, il est important de comprendre quelles formes de travail par quarts ont une incidence sur elle et d’effectuer des travaux permettant d’évaluer de façon plus détaillée l’exposition au travail par quarts. Méthodologie : Au moyen d’une régression logistique polytomique multivariée, nous avons étudié l’association entre le travail par quarts (de soir ou nuit, par quarts ou autre type de rotation et le surpoids et l’obésité, en fonction d’une mesure transversale de l’indice de masse corporelle chez 1 561 hommes. Ces hommes avaient déjà servi de témoins dans une étude cas-témoins sur le cancer de la prostate menée dans le nord-est de l’Ontario de 1995 à 1999. Nous avons obtenu l’information sur leurs antécédents de travail (notamment sur le travail par quarts, leur taille et leur poids à partir de données autodéclarées recueillies par questionnaire. Résultats : Nous avons observé une association entre le fait d’avoir déjà travaillé par quarts (par opposition au fait de n’avoir jamais travaillé par quarts et le surpoids (RC [rapport de cotes] = 1,34; IC [intervalle de confiance] à 95 % : 1,05 à 1,73 ainsi que l’obésité (RC = 1,57; IC à 95 % : 1,12 à 2,21. Nous avons également observé des associations statistiquement non significatives avec le fait d’avoir déjà travaillé (par opposition au fait de n’avoir jamais travaillé de façon permanente selon un quart de soir ou de nuit. Nous avons par ailleurs observé une tendance à la hausse statistiquement significative en ce qui concerne le risque de surpoids et d’obésité en fonction de la durée du travail par quarts. Conclusion : Tant l�

Molecular Gas toward the Gemini OB1 Molecular Cloud Complex. II. CO Outflow Candidates with Possible WISE Associations

Science.gov (United States)

Li, Yingjie; Li, Fa-Cheng; Xu, Ye; Wang, Chen; Du, Xin-Yu; Yang, Wenjin; Yang, Ji

2018-03-01

We present a large-scale survey of CO outflows in the Gem OB1 molecular cloud complex and its surroundings, using the Purple Mountain Observatory Delingha 13.7 m telescope. A total of 198 outflow candidates were identified over a large area (∼58.5 square degrees), of which 193 are newly detected. Approximately 68% (134/198) are associated with the Gem OB1 molecular cloud complex, including clouds GGMC 1, GGMC 2, BFS 52, GGMC 3, and GGMC 4. Other regions studied are: the Local arm (Local Lynds, West Front), Swallow, Horn, and Remote cloud. Outflow candidates in GGMC 1, BFS 52, and Swallow are mainly located at ring-like or filamentary structures. To avoid excessive uncertainty in distant regions (≳3.8 kpc), we only estimated the physical parameters for clouds in the Gem OB1 molecular cloud complex and in the Local arm. In those clouds, the total kinetic energy and the energy injection rate of the identified outflow candidates are ≲1% and ≲3% of the turbulent energy and the turbulent dissipation rate of each cloud, indicating that the identified outflow candidates cannot provide enough energy to balance turbulence of their host cloud at the scale of the entire cloud (several to dozens of parsecs). The gravitational binding energy of each cloud is ≳135 times the total kinetic energy of the identified outflow candidates within the corresponding cloud, indicating that the identified outflow candidates cannot cause major disruptions to the integrity of their host cloud at the scale of the entire cloud.

Nanoparticle Delivered Human Biliverdin Reductase-Based Peptide Increases Glucose Uptake by Activating IRK/Akt/GSK3 Axis: The Peptide Is Effective in the Cell and Wild-Type and Diabetic Ob/Ob Mice

Directory of Open Access Journals (Sweden)

Peter E. M. Gibbs

2016-01-01

Full Text Available Insulin’s stimulation of glucose uptake by binding to the IRK extracellular domain is compromised in diabetes. We have recently described an unprecedented approach to stimulating glucose uptake. KYCCSRK (P2 peptide, corresponding to the C-terminal segment of hBVR, was effective in binding to and inducing conformational change in the IRK intracellular kinase domain. Although myristoylated P2, made of L-amino acids, was effective in cell culture, its use for animal studies was unsuitable. We developed a peptidase-resistant formulation of the peptide that was efficient in both mice and cell culture systems. The peptide was constructed of D-amino acids, in reverse order, and blocked at both termini. Delivery of the encapsulated peptide to HepG2 and HSKM cells was confirmed by its prolonged effect on stimulation of glucose uptake (>6 h. The peptide improved glucose clearance in both wild-type and Ob/Ob mice; it lowered blood glucose levels and suppressed glucose-stimulated insulin secretion. IRK activity was stimulated in the liver of treated mice and in cultured cells. The peptide potentiated function of IRK’s downstream effector, Akt-GSK3-(α,β axis. Thus, P2-based approach can be used for improving glucose uptake by cells. Also, it allows for screening peptides in vitro and in animal models for treatment of diabetes.

Quantitative variation in obesity-related traits and insulin precursors linked to the OB gene region on human chromosome 7

Energy Technology Data Exchange (ETDEWEB)

Duggirala, R.; Stern, M.P.; Reinhart, L.J. [Univ. of Texas Health Science Center, San Antonio, TX (United States)] [and others

1996-09-01

Despite the evidence that human obesity has strong genetic determinants, efforts at identifying specific genes that influence human obesity have largely been unsuccessful. Using the sibship data obtained from 32 low-income Mexican American pedigrees ascertained on a type II diabetic proband and a multipoint variance-components method, we tested for linkage between various obesity-related traits plus associated metabolic traits and 15 markers on human chromosome 7. We found evidence for linkage between markers in the OB gene region and various traits, as follows: D7S514 and extremity skinfolds (LOD = 3.1), human carboxypeptidase A1 (HCPA1) and 32,33-split proinsulin level (LOD = 4.2), and HCPA1 and proinsulin level (LOD = 3.2). A putative susceptibility locus linked to the marker D7S514 explained 56% of the total phenotypic variation in extremity skinfolds. Variation at the HCPA1 locus explained 64% of phenotypic variation in proinsulin level and {approximately}73% of phenotypic variation in split proinsulin concentration, respectively. Weaker evidence for linkage to several other obesity-related traits (e.g., waist circumference, body-mass index, fat mass by bioimpedance, etc.) was observed for a genetic location, which is {approximately}15 cM telomeric to OB. In conclusion, our study reveals that the OB region plays a significant role in determining the phenotypic variation of both insulin precursors and obesity-related traits, at least in Mexican Americans. 66 refs., 3 figs., 4 tabs.

Variable millimetre radiation from the colliding-wind binary Cygnus OB2 #8A

Science.gov (United States)

Blomme, R.; Fenech, D. M.; Prinja, R. K.; Pittard, J. M.; Morford, J. C.

2017-12-01

Context. Massive binaries have stellar winds that collide. In the colliding-wind region, various physically interesting processes occur, leading to enhanced X-ray emission, non-thermal radio emission, as well as non-thermal X-rays and gamma-rays. Non-thermal radio emission (due to synchrotron radiation) has so far been observed at centimetre wavelengths. At millimetre wavelengths, the stellar winds and the colliding-wind region emit more thermal free-free radiation, and it is expected that any non-thermal contribution will be difficult or impossible to detect. Aims: We aim to determine if the material in the colliding-wind region contributes substantially to the observed millimetre fluxes of a colliding-wind binary. We also try to distinguish the synchrotron emission from the free-free emission. Methods: We monitored the massive binary Cyg OB2 #8A at 3 mm with the NOrthern Extended Millimeter Array (NOEMA) interferometer of the Institut de Radioastronomie Millimétrique (IRAM). The data were collected in 14 separate observing runs (in 2014 and 2016), and provide good coverage of the orbital period. Results: The observed millimetre fluxes range between 1.1 and 2.3 mJy, and show phase-locked variability, clearly indicating that a large part of the emission is due to the colliding-wind region. A simple synchrotron model gives fluxes with the correct order of magnitude, but with a maximum that is phase-shifted with respect to the observations. Qualitatively this phase shift can be explained by our neglect of orbital motion on the shape of the colliding-wind region. A model using only free-free emission results in only a slightly worse explanation of the observations. Additionally, on the map of our observations we also detect the O6.5 III star Cyg OB2 #8B, for which we determine a 3 mm flux of 0.21 ± 0.033 mJy. Conclusions: The question of whether synchrotron radiation or free-free emission dominates the millimetre fluxes of Cyg OB2 #8A remains open. More detailed

Estudios sobre la reactividad de harinas crudas de cemento tratadas con rápidos y diferentes calentamientos

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Weisweiler, W.

1988-09-01

Full Text Available Not available.

Estudios experimentales llevados a cabo a una temperatura dada de calcinación, sirvieron para observar el efecto de las altas velocidades de calentamiento sobre las reacciones del clinker. Mientras que un aumento de la reactividad de los materiales fue claramente detectada cuando la velocidad pasó de 20 K/min a tomar valores iguales y mayores a 100 K/min, un negativo efecto sobre el Tiempo de Reacción Completa o "Período de Calcinación a Punto" no pudo ser establecido. Considerando además que el tiempo necesario para llevar a la materia prima hasta la temperatura de reacción, es necesariamente un tiempo inefectivo, podrían las plantas productoras de cemento obtener mayores rendimientos en tiempo y espacio, utilizando altas cuotas de calentamiento. Estudios de microscopía probaron que con el aumento de las velocidades de calentamiento, hubo una mayor generación de microcristales incidiendo directamente sobre la molienda y calidad del clinker. [de] Untersuchungen zur Reaktivität van zementrohmehlen nach verschieden schneller Aufheizung. Modellversuche mit linearen Aufheizgeschwindigkeiten solten zeigen, ob bei einer vorgegebenen Brenntemperatur die Verklinkerungsreaktionen beeinfluβt werden können. Während eindeutige Steigerungen der Kalkbindungsraten lediglich zwischen 20 K/min und Aufheizgeschwindigkeiten >=100 K/min nachweisbar waren, konnten negative Auswirkungen auf die Garbranddauern bei keiner Versuchsserie festgestellt werden. Unter Berücksichtigung der zur Aufheizung der Rohstoffe notwendigen Totzeiten, können bei den technischen Zementproduktionsanlagen nach schneller Aufheizung höhere Raum-Zeit-Ausbeuten erreicht werden. Mikroskopische Untersuchungen ergaben, daβ durch Erhöhung der Aufheizraten der Anteil mikrokristalliner Klinkerphasen zunimmt, was sich direkt aut die Zementklinkermahibarkeit und die Klinkerqualität aswirkt.

As assessment of the flux of radionuclide contamination through the Ob and Yenisei rivers and estuaries to the Kara Sea

International Nuclear Information System (INIS)

Pauluszkiewicz, T.; Hibler, L.F.; Richmond, M.C.; Bradley, D.J.

1995-01-01

Recent data indicate that there are potentially large sources of radionuclide contamination on the Ob River system. To quantify the existing radionuclide contamination from a possible catastrophic event data and models have been used to quantify scenarios. Using a compilation of Russian data on the radionuclide contamination, hydrologic data and studies on the sediment transport process a conceptual model has been developed of the Ob system, and a numerical model has been applied to estimate the radionuclide flux to the Kara Sea. The initial results of the river modeling in the Mayak region show how important watershed flow from the marshes are to the hydrologic budget of the area. The preliminary analysis of the sediment flux indicates the need to consider the depositional (storage) regions such as the Asanow Marsh. 31 refs., 5 figs

New Low-mass Stars in the 25 Orionis Stellar Group and Orion OB1a Sub-association from SDSS-III/BOSS Spectroscopy

Science.gov (United States)

Suárez, Genaro; Downes, Juan José; Román-Zúñiga, Carlos; Covey, Kevin R.; Tapia, Mauricio; Hernández, Jesús; Petr-Gotzens, Monika G.; Stassun, Keivan G.; Briceño, César

2017-07-01

The Orion OB1a sub-association is a rich low-mass star (LMS) region. Previous spectroscopic studies have confirmed 160 LMSs in the 25 Orionis stellar group (25 Ori), which is the most prominent overdensity of Orion OB1a. Nonetheless, the current census of the 25 Ori members is estimated to be lower than 50% complete, leaving a large number of members to be still confirmed. We retrieved 172 low-resolution stellar spectra in Orion OB1a observed as ancillary science in the SDSS-III/BOSS survey, for which we classified their spectral types and determined physical parameters. To determine memberships, we analyzed the {{{H}}}α emission, Li I λ6708 absorption, and Na I λλ8183, 8195 absorption as youth indicators in stars classified as M type. We report 50 new LMSs spread across the 25 Orionis, ASCC 18, and ASCC 20 stellar groups with spectral types from M0 to M6, corresponding to a mass range of 0.10≤slant m/{M}⊙ ≤slant 0.58. This represents an increase of 50% in the number of known LMSs in the area and a net increase of 20% in the number of 25 Ori members in this mass range. Using parallax values from the Gaia DR1 catalog, we estimated the distances to these three stellar groups and found that they are all co-distant, at 338 ± 66 pc. We analyzed the spectral energy distributions of these LMSs and classified their disks into evolutionary classes. Using H-R diagrams, we found a suggestion that 25 Ori could be slightly older than the other two observed groups in Orion OB1a.

Mealybugs (Hemiptera: Coccomorpha: Pseudococcidae) attacking Hibiscus rosa-sinensis L. in Malaysia, with two new country records

Science.gov (United States)

Sartiami, Dewi; Watson, Gillian W.; Mohamad Roff, M. N.; Idris, A. B.

2016-11-01

A survey of mealybugs (Hemiptera: Coccomorpha: Pseudococcidae) attacking the national flower of Malaysia, Hibiscus rosa-sisnensis L. and Hibiscus spp. (Malvaceae) was conducted in Selangor and Kuala Lumpur, Malaysia, from January to March 2016. Adult females were mounted on microscope slides in Canada balsam. The five species identified were Ferrisia dasylirii (Cockerell), Maconellicoccus hirsutus (Green), Paracoccus marginatus Williams and Granara de Willink, Phenacoccus solenopsis (Tinsley) and Pseudococcus jackbeardsleyi Gimpel & Miller. Two of these, the invasive species Ferrisia dasylirii and P. solenopsis were introduced and first recorded in Malaysia.

THE NON-THERMAL, TIME-VARIABLE RADIO EMISSION FROM Cyg OB2 no. 5: A WIND-COLLISION REGION

International Nuclear Information System (INIS)

Ortiz-Leon, Gisela N.; Loinard, Laurent; RodrIguez, Luis F.; Dzib, Sergio A.; Mioduszewski, Amy J.

2011-01-01

The radio emission from the well-studied massive stellar system Cyg OB2 no. 5 is known to fluctuate with a period of 6.7 years between a low-flux state, when the emission is entirely of free-free origin, and a high-flux state, when an additional non-thermal component (of hitherto unknown nature) appears. In this paper, we demonstrate that the radio flux of that non-thermal component is steady on timescales of hours and that its morphology is arc-like. This shows that the non-thermal emission results from the collision between the strong wind driven by the known contact binary in the system and that of an unseen companion on a somewhat eccentric orbit with a 6.7 year period and a 5-10 mas semimajor axis. Together with the previously reported wind-collision region located about 0.''8 to the northeast of the contact binary, so far Cyg OB2 no. 5 appears to be the only multiple system known to harbor two radio-imaged wind-collision regions.

Growth of yttrium iron garnet single crystals in Na2O-B2O3 flux system in air

International Nuclear Information System (INIS)

Bandyopadhyay, Tarun; Saha, Prasenjit

1977-01-01

Detailed studies of growth of yttrium iron garnet (YIG) in the flux system Na 2 O-B 2 O 3 were made to delineate the phase stability regions of YIG and the neighbouring crystalline phases, and a tentative working diagram of Na 2 O-B 2 O 3 -YIG in air was drawn from the results of small batch crystal growth runs and solubility studies. The occurrence of a rather narrow field of YIG crystallization in this system was explained on the basis of relative solubilities of different oxides constituting YIG. Several long-time growth runs with some typical compositions were carried out in this system to evaluate its suitability for bulk growth of YIG crystals. The system, although possessing some inherent advantages, was found to suffer from limitations because the maximum size of the self-nucleated crystals grown hardly exceeded 2.00 mm. (author)

Lutter contre l'obésité en Afrique du Sud à l'aide des politiques fiscales

International Development Research Centre (IDRC) Digital Library (Canada)

17 nov. 2016 ... En 2008, le fardeau total des maladies non transmissibles en Afrique du Sud était estimé à 40 %, et ne cessait de croître. L'obésité est un facteur de risque de plusieurs maladies non transmissibles, dont les cardiopathies, l'hypertension, le diabète et le cancer.

Globules and pillars in Cygnus X. I. Herschel far-infrared imaging of the Cygnus OB2 environment

Science.gov (United States)

Schneider, N.; Bontemps, S.; Motte, F.; Blazere, A.; André, Ph.; Anderson, L. D.; Arzoumanian, D.; Comerón, F.; Didelon, P.; Di Francesco, J.; Duarte-Cabral, A.; Guarcello, M. G.; Hennemann, M.; Hill, T.; Könyves, V.; Marston, A.; Minier, V.; Rygl, K. L. J.; Röllig, M.; Roy, A.; Spinoglio, L.; Tremblin, P.; White, G. J.; Wright, N. J.

2016-06-01

The radiative feedback of massive stars on molecular clouds creates pillars, globules and other features at the interface between the H II region and molecular cloud. Optical and near-infrared observations from the ground as well as with the Hubble or Spitzer satellites have revealed numerous examples of such cloud structures. We present here Herschel far-infrared observations between 70 μm and 500 μm of the immediate environment of the rich Cygnus OB2 association, performed within the Herschel imaging survey of OB Young Stellar objects (HOBYS) program. All of the observed irradiated structures were detected based on their appearance at 70 μm, and have been classified as pillars, globules, evaporating gasous globules (EGGs), proplyd-like objects, and condensations. From the 70 μm and 160 μm flux maps, we derive the local far-ultraviolet (FUV) field on the photon dominated surfaces. In parallel, we use a census of the O-stars to estimate the overall FUV-field, that is 103-104 G0 (Habing field) close to the central OB cluster (within 10 pc) and decreases down to a few tens G0, in a distance of 50 pc. From a spectral energy distribution (SED) fit to the four longest Herschel wavelengths, we determine column density and temperature maps and derive masses, volume densities and surface densities for these structures. We find that the morphological classification corresponds to distinct physical properties. Pillars and globules are massive (~500 M⊙) and large (equivalent radius r ~ 0.6 pc) structures, corresponding to what is defined as "clumps" for molecular clouds. EGGs and proplyd-likeobjects are smaller (r ~ 0.1 and 0.2 pc) and less massive (~10 and ~30 M⊙). Cloud condensations are small (~0.1 pc), have an average mass of 35 M⊙, are dense (~6 × 104 cm-3), and can thus be described as molecular cloud "cores". All pillars and globules are oriented toward the Cyg OB2 association center and have the longest estimated photoevaporation lifetimes, a few million

B fields in OB stars (BOB): Low-resolution FORS2 spectropolarimetry of the first sample of 50 massive stars

NARCIS (Netherlands)

Fossati, L.; Castro, N.; Schöller, M.; Hubrig, S.; Langer, N.; Morel, T.; Briquet, M.; Herrero, A.; Przybilla, N.; Sana, H.; Schneider, F.R.N.; de Koter, A.

2015-01-01

Within the context of the collaboration "B fields in OB stars" (BOB), we used the FORS2 low-resolution spectropolarimeter to search for a magnetic field in 50 massive stars, including two reference magnetic massive stars. Because of the many controversies of magnetic field detections obtained with

New Parallaxes for the Upper Scorpius OB Association

Science.gov (United States)

Donaldson, J. K.; Weinberger, A. J.; Gagné, J.; Boss, A. P.; Keiser, S. A.

2017-11-01

Upper Scorpius is a subgroup of the nearest OB association, Scorpius-Centaurus. Its young age makes it an important association to study star and planet formation. We present parallaxes to 52 low-mass stars in Upper Scorpius, 28 of which have full kinematics. We measure ages of the individual stars by combining our measured parallaxes with pre-main-sequence evolutionary tracks. We find a significant difference in the ages of stars with and without circumstellar disks. The stars without disks have a mean age of 4.9 ± 0.8 Myr and those with disks have an older mean age of 8.2 ± 0.9 Myr. This somewhat counterintuitive result suggests that evolutionary effects in young stars can dominate their apparent ages. We also attempt to use the 28 stars with full kinematics (I.e., proper motion, radial velocity (RV), and parallax) to trace the stars back in time to their original birthplace to obtain a trackback age. As expected, given the large measurement uncertainties on available RV measurements, we find that measurement uncertainties alone cause the group to diverge after a few Myr.

Nature vs. Nurture: The influence of OB star environments on proto-planetary disk evolution

Science.gov (United States)

Bouwman, Jeroen

2006-09-01

We propose a combined IRAC/IRS study of a large, well-defined and unbiased X-ray selected sample of pre-main-sequence stars in three OB associations: Pismis 24 in NGC 6357, NGC 2244 in the Rosette Nebula, and IC 1795 in the W3 complex. The samples are based on recent Chandra X-ray Observatory studies which reliably identify hundreds of cluster members and were carefully chosen to avoid high infrared nebular background. A new Chandra exposure of IC 1795 is requested, and an optical followup to characterise the host stars is planned.

Enhancing the Quality of Service for Real Time Traffic over Optical Burst Switching (OBS Networks with Ensuring the Fairness for Other Traffics.

Directory of Open Access Journals (Sweden)

Mohammed A Al-Shargabi

Full Text Available Optical burst switching (OBS networks have been attracting much consideration as a promising approach to build the next generation optical Internet. A solution for enhancing the Quality of Service (QoS for high priority real time traffic over OBS with the fairness among the traffic types is absent in current OBS' QoS schemes. In this paper we present a novel Real Time Quality of Service with Fairness Ratio (RT-QoSFR scheme that can adapt the burst assembly parameters according to the traffic QoS needs in order to enhance the real time traffic QoS requirements and to ensure the fairness for other traffic. The results show that RT-QoSFR scheme is able to fulfill the real time traffic requirements (end to end delay, and loss rate ensuring the fairness for other traffics under various conditions such as the type of real time traffic and traffic load. RT-QoSFR can guarantee that the delay of the real time traffic packets does not exceed the maximum packets transfer delay value. Furthermore, it can reduce the real time traffic packets loss, at the same time guarantee the fairness for non real time traffic packets by determining the ratio of real time traffic inside the burst to be 50-60%, 30-40%, and 10-20% for high, normal, and low traffic loads respectively.

Mass loss rates of OB stars derived from infrared observations

International Nuclear Information System (INIS)

Tanzi, E.G.; Tarenghi, M.; Panagia, N.

1981-01-01

In this paper the authors report briefly on a study of the mass loss of early type stars in the infrared. Up to now near infrared (1.25 - 4.8 μ) broad band photometry of 70 southern OB stars of various luminosity class has been secured. Program stars have been selected, among those bright enough in the infrared to give a suitable photometric accuracy, in order to cover a wide range of spectral types. 37 stars are found to exhibit emission in excess over a blackbody photospheric continuum, which is interpreted in terms of gas ejected in the form of an accelerated wind. By means of model calculations the corresponding mass loss rates are derived. The obtained values compare well with those determined independently by various authors for stars in common. Their data show that mass loss rates increase with luminosity and are a decreasing function of surface gravity. (Auth.)

A survey of formaldehyde in the Cepheus OB3 molecular cloud

International Nuclear Information System (INIS)

Few, R.W.; Cohen, R.J.

1983-01-01

The 1 11 - 1 10 absorption line of formaldehyde at 6-cm wavelength has been surveyed over the region of the Cepheus OB3 molecular cloud, using the Jodrell Bank Mk II radio telescope (beamwidth 9 x 10 arcmin 2 ). The measurements have a velocity resolution of 0.27 km s - 1 and an rms noise level of approx. 0.01 K. The formaldehyde has a very clumpy distribution which is broadly similar to the CO distribution found by Sargent. A total molecular mass of 1.9 x 10 4 solar masses is implied by the formaldehyde measurements. Cepheus A is not the dominant concentration in the formaldehyde map. The most massive formaldehyde concentration is Cepheus C, which has a mass of 3600 solar masses. It appears to be stabilized by rotation. (author)

De la ferme à la fourchette – lutte contre l'obésité chez les enfants ...

International Development Research Centre (IDRC) Digital Library (Canada)

26 avr. 2016 ... ... but de combattre l'obésité chez les enfants. La démarche repose sur trois piliers, à savoir augmenter la proportion de fruits et de légumes frais dans les repas servis à l'école, faciliter l'approvisionnement en produits auprès des agriculteurs locaux et favoriser l'augmentation de la production maraîchère.

Circulating Ghrelin, Leptin, and Soluble Leptin Receptor Concentrations and Cardiometabolic Risk Factors in a Community-Based Sample

OpenAIRE

Ingelsson, Erik; Larson, Martin G.; Yin, Xiaoyan; Wang, Thomas J.; Meigs, James B.; Lipinska, Izabella; Benjamin, Emelia J.; Keaney, John F.; Vasan, Ramachandran S.

2008-01-01

Context: The conjoint effects and relative importance of ghrelin, leptin, and soluble leptin receptor (sOB-R), adipokines involved in appetite control and energy expenditure in mediating cardiometabolic risk, is unknown.

Apuntes sobre esporotricosis

OpenAIRE

Londoño, Fabio

2011-01-01

Se hace una breve reseña histórica de las primeras comunicaciones sobre esporotricosis. Se destaca la amplia difusión de la enfermedad en nuestro país. 3. Se hace notar la no existencia de datos bibliográficos sobre formas extracutáneas. 4. Se llama la atención sobre la eficaz ayuda de la intradermo-reacción con esporotriquina en el diagnóstico de la enfermedad. 5- Se comunica un caso de esporotricosis verrugosa tratado con anfotericin B, con excelentes resultados

Apuntes sobre esporotricosis

Directory of Open Access Journals (Sweden)

Fabio Londoño

1960-01-01

Full Text Available Se hace una breve reseña histórica de las primeras comunicaciones sobre esporotricosis. Se destaca la amplia difusión de la enfermedad en nuestro país. 3. Se hace notar la no existencia de datos bibliográficos sobre formas extracutáneas. 4. Se llama la atención sobre la eficaz ayuda de la intradermo-reacción con esporotriquina en el diagnóstico de la enfermedad. 5- Se comunica un caso de esporotricosis verrugosa tratado con anfotericin B, con excelentes resultados

A Novel Congestion Detection Scheme in TCP Over OBS Networks

KAUST Repository

Shihada, Basem

2009-02-01

This paper introduces a novel congestion detection scheme for high-bandwidth TCP flows over optical burst switching (OBS) networks, called statistical additive increase multiplicative decrease (SAIMD). SAIMD maintains and analyzes a number of previous round-trip time (RTTs) at the TCP senders in order to identify the confidence with which a packet loss event is due to network congestion. The confidence is derived by positioning short-term RTT in the spectrum of long-term historical RTTs. The derived confidence corresponding to the packet loss is then taken in the developed policy for TCP congestion window adjustment. We will show through extensive simulation that the proposed scheme can effectively solve the false congestion detection problem and significantly outperform the conventional TCP counterparts without losing fairness. The advantages gained in our scheme are at the expense of introducing more overhead in the SAIMD TCP senders. Based on the proposed congestion control algorithm, a throughput model is formulated, and is further verified by simulation results.

The history and source of particulate 137Cs and 239,240Pu deposition in sediments of the Ob River Delta, Siberia

International Nuclear Information System (INIS)

Sayles, F.L.; Livingston, H.D.; Panteleyev, G.P.

1997-01-01

This paper presents the first results of a project designed to examine the transfer of particle-associated artificial radionuclides down the Ob River in Siberia to its delta over the past 5 decades. The main sources include fallout from atmospheric nuclear weapons tests and weapons complexes and test sites of the Former Soviet Union in or near the Ob watershed. The approach is to measure the accumulation of the radionuclides in undisturbed delta sediments - obtaining a record of their deposition over time. These records were found in sediments of shallow lakes apart from, and connected to, the main channel. Sediment cores were collected in the summer of 1994 using a shallow draft catamaran to reach these lakes from a support ship in the main channel. Measurements are presented on the depth distributions of 137 Cs and Pu isotopes and their inventories in a series of dated sediment cores - including one from a location in the Taz Estuary (which does not receive Ob River sediments). Sediment dating was carried out using the excess 210 Pb technique. The results obtained are compared with known information on the temporal history of releases from the various sources and characteristics of the isotopic composition of the sources. The results show that good records of radionuclide deposition indicate that the major fraction of 137 Cs and Pu isotopes deposited in these delta sediments comes from atmospheric nuclear weapons test fallout - both delivered directly from the atmosphere and from downstream transport of watershed sediments. No more than 25% of the observed inventories could be derived from other sources

The current content of artificial radionuclides in the water of the Tobol-Irtysh river system (from the mouth of the Iset River to the confluence with the Ob River)

International Nuclear Information System (INIS)

Nikitin, Alexander I.; Chumichev, Vladimir B.; Valetova, Nailia K.; Katrich, Ivan Yu.; Kabanov, Alexander I.; Dunaev, Gennady E.; Shkuro, Valentina N.; Rodin, Victor M.; Mironenko, Alexander N.; Kireeva, Elena V.

2007-01-01

Data on content of 90 Sr, 137 Cs, 239,240 Pu and 3 H in water of the Tobol-Irtysh part of the Techa-Iset-Tobol-Irtysh-Ob river system (through which the 'Mayak' PA radioactive wastes are transported) are presented and discussed. The data were received in 2004-2005 under the ISTC project on radioecological monitoring of the Tobol and Irtysh rivers. Monthly observations of 137 Cs, 90 Sr and 3 H content in water in the area of the Tobol and Irtysh confluence have been conducted starting from May 2004. To obtain information on the investigated river system as a whole, the radioecological survey of the Tobol and Irtysh rivers at the section from the mouth of the Iset River to the confluence with the Ob River was carried out in 2004. It is shown that the impact of 'Mayak' PA waste transport by 90 Sr is distinctly traced as far as the area of the Irtysh and Ob confluence

Sensitivity analysis of P-waves and S-waves to gas hydrate in the Shenhu area using OBS

Science.gov (United States)

Xing, Lei; Liu, Xueqin; Zhang, Jin; Liu, Huaishan; Zhang, Jing; Li, Zizheng; Wang, Jianhua

2018-02-01

Compared to towed streamers, ocean-bottom seismometers (OBS) obtain both S-wave data and richer wavefield information. In this paper, the induced polarization method is used to conduct wavefield separation on OBS data obtained from the Shenhu area in the South China Sea. A comparison of the changes in P- and S-waves, and a comprehensive analysis of geological factors within the area, enable analysis and description of the occurrence of natural gas hydrate in the study area. Results show an increase in P-wave velocity when natural gas hydrate exists in the formation, whereas the S-wave velocity remains almost constant, as S-waves can only propagate through the rock skeleton. Therefore, the bottom-simulating reflection (BSR) response of the P-wave is better than that of the S-wave in the frequency analysis profile. In a wide-angle section, the refractive wave of the hydrate layer is evident when using P-wave components but identification is difficult with S-wave components. This velocity model illustrates the sensitivity of P- and S-wave components to gas hydrate. The use of this polarization method and results of analysis provide technical and theoretical support for research on hydrate deposits and other geological features in the Shenhu area.

Direct Imaging and Spectroscopy of a Young Extrasolar Kuiper Belt in the Nearest OB Association

OpenAIRE

Currie, Thayne; Lisse, Carey M.; Kuchner, Marc J.; Madhusudhan, Nikku; Kenyon, Scott J.; Thalmann, Christian; Carson, Joseph; Debes, John H.

2015-01-01

We describe the discovery of a bright, young Kuiper belt-like debris disk around HD 115600, a $\\sim$ 1.4--1.5 M$_\\mathrm{\\odot}$, $\\sim$ 15 Myr old member of the Sco-Cen OB Association. Our H-band coronagraphy/integral field spectroscopy from the \\textit{Gemini Planet Imager} shows the ring has a (luminosity scaled) semi major axis of ($\\sim$ 22 AU) $\\sim$ 48 AU, similar to the current Kuiper belt. The disk appears to have neutral scattering dust, is eccentric (e $\\sim$ 0.1--0.2), and could b...

SCUBA and HIRES Results for Protostellar Cores in the MON OB1 Dark Cloud

Science.gov (United States)

Wolf-Chase, G.; Moriarty-Schieven, G.; Fich, M.; Barsony, M.

1999-05-01

We have used HIRES-processing of IRAS data and point-source modelling techniques (Hurt & Barsony 1996; O'Linger 1997; Barsony et al. 1998), together with submillimeter continuum imaging using the Submillimeter Common-User Bolometer Array (SCUBA) on the 15-meter James Clerk Maxwell Telescope (JCMT), to search CS cores in the Mon OB1 dark cloud (Wolf-Chase, Walker, & Lada 1995; Wolf-Chase & Walker 1995) for deeply embedded sources. These observations, as well as follow-up millimeter photometry at the National Radio Astronomy Observatory (NRAO) 12-meter telescope on Kitt Peak, have lead to the identification of two Class 0 protostellar candidates, which were previously unresolved from two brighter IRAS point sources (IRAS 06382+0939 & IRAS 06381+1039) in this cloud. Until now, only one Class 0 object had been confirmed in Mon OB1; the driving source of the highly-collimated outflow NGC 2264 G (Ward-Thompson, Eiroa, & Casali 1995; Margulis et al. 1990; Lada & Fich 1996), which lies well outside the extended CS cores. One of the new Class 0 candidates may be an intermediate-mass source associated with an H_2O maser, and the other object is a low-mass source which may be associated with a near-infrared jet, and possibly with a molecular outflow. We report accurate positions for the new Class 0 candidates, based on the SCUBA images, and present new SEDs for these sources, as well as for the brighter IRAS point sources. A portion of this work was performed while GWC held a President's Fellowship from the University of California. MB and GWC gratefully acknowledge financial support from MB's NSF CAREER Grant, AST97-9753229.

Eukaryotic RNA polymerase subunit RPB8 is a new relative of the OB family.

Science.gov (United States)

Krapp, S; Kelly, G; Reischl, J; Weinzierl, R O; Matthews, S

1998-02-01

RNA polymerase II subunit RPB8 is an essential subunit that is highly conserved throughout eukaryotic evolution and is present in all three types of nuclear RNA polymerases. We report the first high resolution structural insight into eukaryotic RNA polymerase architecture with the solution structure of RPB8 from Saccharomyces cerevisiae. It consists of an eight stranded, antiparallel beta-barrel, four short helical regions and a large, unstructured omega-loop. The strands are connected in classic Greek-key fashion. The overall topology is unusual and contains a striking C2 rotational symmetry. Furthermore, it is most likely a novel associate of the oligonucleotide/oligosaccharide (OB) binding protein class.

Extinctions and Distances to Dark Clouds from 2MASS, MegaCam and IPHAS Surveys: LDN 1525 in the Direction of the Aur OB1 Association

Directory of Open Access Journals (Sweden)

Straižys V.

2010-12-01

Full Text Available The possibility of applying photometry from the 2MASS J, H, Ks, MegaCam u, g and IPHAS r, i, Hα surveys for determining the distance to the dark cloud LDN1525 (TGU 1192 in the direction of the Aur OB1 association is investigated using the red clump giants. The main dust cloud, probably related to the emission nebulae Sh 2-232, Sh 2-233, Sh 2-235, the molecular cloud and the association Aur OB2, is found to be located at a distance of 1.3 kpc from the Sun. The nebula Sh 2-231 can be an object of the Perseus arm. The maximum extinction AV found in the cloud is close to 6 mag.

The current content of artificial radionuclides in the water of the Tobol-Irtysh river system (from the mouth of the Iset River to the confluence with the Ob River)

Energy Technology Data Exchange (ETDEWEB)

Nikitin, Alexander I. [SI RPA ' Typhoon' of the Roshydromet, 82, Lenin avenue, Obninsk, Kaluga region 249038 (Russian Federation)]. E-mail: nikitin@typhoon.obninsk.ru; Chumichev, Vladimir B. [SI RPA ' Typhoon' of the Roshydromet, 82, Lenin avenue, Obninsk, Kaluga region 249038 (Russian Federation); Valetova, Nailia K. [SI RPA ' Typhoon' of the Roshydromet, 82, Lenin avenue, Obninsk, Kaluga region 249038 (Russian Federation); Katrich, Ivan Yu. [SI RPA ' Typhoon' of the Roshydromet, 82, Lenin avenue, Obninsk, Kaluga region 249038 (Russian Federation); Kabanov, Alexander I. [SI RPA ' Typhoon' of the Roshydromet, 82, Lenin avenue, Obninsk, Kaluga region 249038 (Russian Federation); Dunaev, Gennady E. [SI RPA ' Typhoon' of the Roshydromet, 82, Lenin avenue, Obninsk, Kaluga region 249038 (Russian Federation); Shkuro, Valentina N. [SI RPA ' Typhoon' of the Roshydromet, 82, Lenin avenue, Obninsk, Kaluga region 249038 (Russian Federation); Rodin, Victor M. [Tobolsk Biological Station of RAS, 15, Voikov street, Tobolsk, Tyumen region 626150 (Russian Federation); Mironenko, Alexander N. [Tobolsk Biological Station of RAS, 15, Voikov street, Tobolsk, Tyumen region 626150 (Russian Federation); Kireeva, Elena V. [Tobolsk Biological Station of RAS, 15, Voikov street, Tobolsk, Tyumen region 626150 (Russian Federation)

2007-07-15

Data on content of {sup 90}Sr, {sup 137}Cs, {sup 239,240}Pu and {sup 3}H in water of the Tobol-Irtysh part of the Techa-Iset-Tobol-Irtysh-Ob river system (through which the 'Mayak' PA radioactive wastes are transported) are presented and discussed. The data were received in 2004-2005 under the ISTC project on radioecological monitoring of the Tobol and Irtysh rivers. Monthly observations of {sup 137}Cs, {sup 90}Sr and {sup 3}H content in water in the area of the Tobol and Irtysh confluence have been conducted starting from May 2004. To obtain information on the investigated river system as a whole, the radioecological survey of the Tobol and Irtysh rivers at the section from the mouth of the Iset River to the confluence with the Ob River was carried out in 2004. It is shown that the impact of 'Mayak' PA waste transport by {sup 90}Sr is distinctly traced as far as the area of the Irtysh and Ob confluence.

ECA&D and E-OBS: High-resolution datasets for monitoring climate change and effects on viticulture in Europe

Directory of Open Access Journals (Sweden)

Photiadou Christiana

2017-01-01

Full Text Available Climate change and climate variability profoundly affect the production of wine. When facing a changing climate, the characteristics of wine produced in each region will change while the natural year-to-year variations in climate will increase variability of income for wine businesses and therefore affect profitability and economic resilience. The challenge posed to the viticulture community is thus to closely monitor these changes to be able to adapt business practices. The European Climate Assessment and Dataset (ECA&D and its gridded version E-OBS are tools to monitor the changing climatic conditions over Europe, with an emphasis on changes in extreme climatic conditions. In this paper, the potential of ECA&D and E-OBS for viticulture is demonstrated by a few examples. The examples include the changing areal suitable for Chardonnay cultivation, showing an expansion to areas which have been too cold only a few decades ago and retraction of optimal conditions from areas which have been suitable in the recent past. Other examples show the change in the diurnal temperature range in the latter stages of the ripening process of grapes and the variability in heavy precipitation events. Finally, first results of a new dataset for South America are presented.

Targeting the OB-Folds of Replication Protein A with Small Molecules

Directory of Open Access Journals (Sweden)

Victor J. Anciano Granadillo

2010-01-01

Full Text Available Replication protein A (RPA is the main eukaryotic single-strand (ss DNA-binding protein involved in DNA replication and repair. We have identified and developed two classes of small molecule inhibitors (SMIs that show in vitro inhibition of the RPA-DNA interaction. We present further characterization of these SMIs with respect to their target binding, mechanism of action, and specificity. Both reversible and irreversible modes of inhibition are observed for the different classes of SMIs with one class found to specifically interact with DNA-binding domains A and B (DBD-A/B of RPA. In comparison with other oligonucleotide/oligosaccharide binding-fold (OB-fold containing ssDNA-binding proteins, one class of SMIs displayed specificity for the RPA protein. Together these data demonstrate that the specific targeting of a protein-DNA interaction can be exploited towards interrogating the cellular activity of RPA as well as increasing the efficacy of DNA-damaging chemotherapeutics used in cancer treatment.

Influencia do tempo de exposicao a obesidade induzida por dieta hiperlipidica sobre os colagenos tipo I e III miocardico

Directory of Open Access Journals (Sweden)

Danielle Cristina Tomaz da Silva

2014-03-01

Full Text Available FUNDAMENTO: A obesidade é um fator de risco para muitas complicações médicas; a pesquisa médica demonstrou que as alterações hemodinâmicas, morfológicas e funcionais estão correlacionadas com a duração e gravidade da obesidade. OBJETIVO: O presente estudo determinou a influência do tempo de exposição à obesidade induzida por dieta com alto teor de gordura no colágenos tipo I e III miocárdico. MÉTODOS: Ratos machos com trinta dias de idade, da raça Wistar, foram distribuídos aleatoriamente em dois grupos: um grupo de controle (C alimentado com ração padrão e um grupo de ratos obesos (Ob alternadamente alimentados com uma de quatro dietas palatáveis ricas em gordura. Cada dieta foi mudada diariamente, e os ratos foram mantidos em suas respectivas dietas por 15 (C15 e Ob15 e 30 (C30 e Ob30 semanas consecutivas. A obesidade foi determinada pelo índice de adiposidade. RESULTADOS: O grupo Ob15 foi similar ao grupo C15 em relação à expressão de colágeno miocárdico tipo I; contudo, a expressão no grupo Ob30 foi menor do que no grupo C30. O tempo de exposição à obesidade foi associado com uma redução de colágeno do tipo I no grupo Ob30, quando comparado com o Ob15. A obesidade não afetou a expressão do colágeno tipo III. CONCLUSÃO: Este estudo mostrou que o tempo de exposição à obesidade por 30 semanas induzida por uma dieta rica em gordura insaturada causou uma redução na expressão do colágeno miocárdico tipo I em ratos obesos. No entanto, nenhum efeito foi observado em relação à expressão do colágeno miocárdico tipo III

Plutonium speciation and isotope ratios in Yenisey and Ob river and Yenisey estuary

International Nuclear Information System (INIS)

Skipperud, L.; Oughton, DH.; Fifield, K.; Lind, O.C.; Salbu, B.; Brown, J.

2004-01-01

Plutonium isotope ratios are known to vary with reactor type, nuclear fuel-burn up time, neutron flux, and energy, and for fallout from nuclear detonations, weapon type and yield. Weapons-grade plutonium is characterized by a low content of the 240 Pu isotope, with 240 Pu/ 239 Pu isotope ratio less than 0.05. In contrast, both global weapons fallout and spent nuclear fuel from civil reactors have higher 240 Pu/ 239 Pu isotope ratios (civil nuclear power reactors have 240 Pu/ 239 Pu atom ratios of between about 0.2-1). Thus, different sources often exhibit characteristic plutonium isotope ratios and these ratios can be used to identify the origin of contamination, calculate inventories, or follow the migration of contaminated sediments and waters. Together with activity measurements and isotope ratios, knowledge of plutonium speciation in the Ob and Yenisey rivers and processes controlling its behaviour in estuarine systems is a prerequisite for predicting the transfer and subsequent environmental impact to Arctic Seas. With this in mind, the study had two objectives: first to determine whether discharges from nuclear installations in the river catchment areas are having any influence on Pu levels in the estuaries; and, second, to investigate the transfer and mobility of plutonium in the Yenisey river and estuary. Plutonium 240/239 ratios were determined using accelerator mass spectrometry (AMS). The data indicated a clear influence from a low 240 Pu: 239 Pu source in surface sediments collected from the Yenisey Estuary, whereas plutonium in the Ob Estuary sediments are dominated by global fallout. The results also show an increase in plutonium concentration and a decrease in isotope ratio going upstream from the estuary. Sequential extractions of sediments indicate that up 70% of the Pu in the Yenisey river is easily mobilized with weak oxidizing agents, which indicates that the Pu is organically bound, while the Pu is more strongly irreversible bound further out

Digital signage sobre IP

OpenAIRE

Casademont Filella, Albert

2012-01-01

Projecte que versa sobre el disseny i la implementació d'un sistema de Digital Signage (Cartelleria Digital) sobre IP, creant un gestor que permeti controlar de forma remota tot un conjunt de petits dispositius connectats a pantalles que emeten continguts multimèdia com vídeos, imatges, feeds rss...

Study of clumping in the Cepheus OB 3 molecular cloud

International Nuclear Information System (INIS)

Carr, J.S.

1987-01-01

A portion of the Cep OB 3 molecular cloud has been mapped in the (C-13)O (1-0) line on a completely sampled grid with a 1.5-arcmin spacing. A total of 45 individual clouds, or clumps, have been identified in the map, with masses from 3 to 300 solar mass, sizes 3 pc or smaller, and mean densities of a few hundred/cu cm. Power-law correlations are found among the clump properties, namely, M proportional to R exp 2.5 and Delta(v) exp 0.24. These exponents differ somewhat from those found for similar correlations for molecular clouds in previous studies. Determination of the virial masses for the clumps shows that the clumps are not gravitationally bound and must be expanding on a time scale of about 1 Myr. Measurements of the (C-13)O (2-1) line give volume densities of 2000-5000. Comparisons of these densities with the mean volume densities from the (C-13)O (1-0) data suggest that the gas is clumped on a small scale with a volume filling factor of 0.04-0.10. 31 references

New Version of SeismicHandler (SHX) based on ObsPy

Science.gov (United States)

Stammler, Klaus; Walther, Marcus

2016-04-01

The command line version of SeismicHandler (SH), a scientific analysis tool for seismic waveform data developed around 1990, has been redesigned in the recent years, based on a project funded by the Deutsche Forschungsgemeinschaft (DFG). The aim was to address new data access techniques, simplified metadata handling and a modularized software design. As a result the program was rewritten in Python in its main parts, taking advantage of simplicity of this script language and its variety of well developed software libraries, including ObsPy. SHX provides an easy access to waveforms and metadata via arclink and FDSN webservice protocols, also access to event catalogs is implemented. With single commands whole networks or stations within a certain area may be read in, the metadata are retrieved from the servers and stored in a local database. For data processing the large set of SH commands is available, as well as the SH scripting language. Via this SH language scripts or additional Python modules the command set of SHX is easily extendable. The program is open source, tested on Linux operating systems, documentation and download is found at URL "https://www.seismic-handler.org/".

Leptin receptor 170 kDa (OB-R170) protein expression is reduced in obese human skeletal muscle: a potential mechanism of leptin resistance

DEFF Research Database (Denmark)

Fuentes, T; Ara, I; Guadalupe-Grau, A

2010-01-01

To examine whether obesity-associated leptin resistance could be due to down-regulation of leptin receptors (OB-Rs) and/or up-regulation of suppressor of cytokine signalling 3 (SOCS3) and protein tyrosine phosphatase 1B (PTP1B) in skeletal muscle, which blunt janus kinase 2-dependent leptin...

Differences in zinc status and the leptin axis in anorexic and recovered adolescents and young adults: a pilot study

Directory of Open Access Journals (Sweden)

F.D. Zepf

2012-03-01

Full Text Available Evidence from animal studies suggests that leptin metabolism is associated with zinc (Zn status. However, research investigating this relationship in adolescents and young adults with anorexia nervosa (AN is scarce; the present study aims to fill that gap.Serum concentrations of leptin, the soluble leptin receptor (sOB-R and the free leptin index (FLI were obtained in healthy control subjects (n=19, acutely ill individuals (n=14 and recovered patients with AN (n=15. Serum Zn concentrations noted in previous research data were also incorporated for all groups.Leptin, FLI and Zn concentrations were higher in recovered subjects with AN when compared with acutely ill AN patients. Remitted patients showed higher sOB-R concentrations but no difference in FLI compared with the control group. Leptin and FLI were lower in the acutely ill patients compared with the control subjects, who showed no differences in Zn concentrations. Zn concentrations were not correlated with leptin, sOB-R or FLI concentrations in any of the three investigated subgroups.The present investigation does not entirely support an association between Zn, Leptin and FLI concentrations in subjects with AN, possibly due to limited statistical power. Further research and replication of the present findings related to the interaction between leptin and Zn is warranted. However, with respect to serum leptin levels the data of the present investigation indicate that acutely ill and remitted patients with AN differ as regards serum leptin concentrations and FLI, which is in line with previous research.

Effects of copper mineralogy and methanobactin on cell growth and sMMO activity in Methylosinus trichosporium OB3b

Directory of Open Access Journals (Sweden)

C. Dennison

2011-10-01

Full Text Available Controls on in situ methanotroph activity are not well understood. One potentially important parameter is copper (Cu because it is the metal-centre of particulate methane monooxygenase (pMMO, the most active enzyme for oxidizing methane to methanol. Further, Cu-to-cell ratios influence the relative expression of pMMO versus the alternate soluble MMO (sMMO in some species. However, most methanotroph studies only have assessed readily soluble forms of Cu (e.g. CuCl2 and there is a dearth of Cu-related activity data for Cu sources more common in the environment. Here we quantified sMMO activity (as a practical indicator of Cu availability and growth kinetics in Methylosinus trichosporium OB3b, an organism that expresses both pMMO and sMMO, when grown on Cu-minerals with differing dissolution equilibria to assess how mineral type and methanobactin (mb might influence in situ methanotroph activity. Mb is a molecule produced by M. trichosporium OB3b that has a high affinity for Cu, reduces Cu toxicity, and may influence Cu availability in terrestrial systems. CuCO3.Cu(OH2 and CuO were chosen for study based on modelling data, reflecting more and less soluble minerals, respectively, and were found to affect M. trichosporium OB3b activity differently. Cells grew without growth lag and with active pMMO on CuCO3.Cu(OH2, regardless of the amount of mineral supplied (−1. The organism also grew well on CuO; however, significant sMMO activity was retained up to 50 μmoles Cu-total l−1, although sMMO activity was suppressed by supplemental mb and-or direct cell-mineral contact. Mb addition increased growth rates (p < 0.05 with both minerals. Results show mb broadly stimulates growth, but Cu mineralogy and mb dictate whether sMMO or pMMO is active in the cells. This explains why sMMO activity has been seen in soils with high Cu and also has implications for predicting dominant MMO activity in terrestrial bioremediation applications.

Evidence for circumstellar obscuration of OB stars

International Nuclear Information System (INIS)

Bohannan, B.

1975-01-01

Reddish found a strong increase of color excess with increasing stellar luminosity: here referred to as the Reddish Effect: in ten young galactic clusters and associations. New photometric and spectroscopic observations drawn from the literature are combined with data used by Reddish to reconsider the color excess versus intrinsic magnitude diagrams of the same ten stellar groups. The reality of the Effect is questioned in all but one of the systems; this was accomplished by identifying possible foreground stars and by recognizing some of the brightest stars as supergiants, then applying correct intrinsic color indices. After careful reanalysis, the one stellar group to retain an indication of the Reddish Effect is Cygnus OB2. No correlation of reddening with luminosity was found for five additional very young stellar groups in the southern hemisphere; these groups should exhibit the Effect if it is a natural consequence of stellar evolution. Reddish ascribed the correlation to massive circumstellar remnants of material from which the stars formed. However, a peculiar dispersion in color excess could also be attributed to patchy dust within the stellar group. In several stellar systems previously identified as displaying the Reddish Effect, a correlation of observed color excess with dust and gas concentrations is noted on Palomar Sky Survey prints. If present, circumstellar dust clouds should []anifest their existence in modes other than a correlation of color excess with luminosity. The following possibilities are considered and all show negative results: correlation of color excess with spectral type; correlation of reddening slope E/subU//sub -//subB//E/subB//sub -//subV/ with spectral type; observable infrared excess. The preceding astrophysical arguments strongly imply that circumstellar dust remnants from stellar formation do not remain around stars during their main-sequence lifetimes. (auth)

More accurate definition of liquation dome in Na2O-B2O3-SiO2 system

International Nuclear Information System (INIS)

Alekseeva, Z.D.; Mazurin, O.V.; Aver'yanov, V.I.; Galakhov, F.Ya.

1977-01-01

The liquation region in the system Na 2 O-B 2 O 3 -SiO 2 was investigated. The liquation temperatures were determined by the boundary of disappearance of opalescence in specimens with pre-induced opalescence. Extrapolation of the concentration dependences of the liquation temperature along sections with a constant SiO 2 content to a point indicates that with a SiO 2 content of 20-40% the liquation boundary in the system B 2 O 3 -SiO 2 hardly lies above 450 deg C

Inferencias sobre Grafos

OpenAIRE

Sira M. Allende; Carlos N. Bouza

2002-01-01

El estudio de un juego puede ser modelado asumiendo que solo algunas partidas son observadas. Entonces el árbol del juego debe ser estimado utilizando información muestral. Similarmente ocurre al obtener información sobre el comportamiento de las decisiones tomadas por individuos muestreados sobre un árbol de decisión teórico. Al considerar una medida de probabilidad que caracterice el comportamiento de redes aleatorias se puede obtener un estimado del árbol asociado. Este problema es el anal...

[Detection of psychosocial dysfunction in ob-gyn patients].

Science.gov (United States)

González-Forteza, C F; Morales Carmona, F; Gutiérrez Calderon, E

1993-01-01

The human behavior and its social determinants are critical variables for understanding the etiology, treatment, and prevention of many disorders previously attributed to biological substrates. Among the many categories of human behavior to receive special attention from health researchers and practitioners are life events, coping responses and emotional state. The relation between these categories constituted a particular field of investigation. This relationship rather than forcing to focus on disease, distress, disability, and other failures in human functioning, permits to address health, abilities, resources, and other positive aspects of human functioning. On the other hand, the re-organization of health services considers interdisciplinary work as an objective, as it is necessary to care for the patient in an integral manner, with the consequent benefit of a more efficient service. In addition it is known that patients with psychosocial dysfunctions who use general practice care facilities overutilize these services in an unnecessary manner. With this in mind it is clear that is necessary to balance the service's cost-benefit for a more efficient clinical attention. In this paper we present the results of the categories mentioned above: life events, coping responses and its relationship with emotional state in a representative sample of 399 female patients who in 1986 received services at the National Institute of Perinatology-INPer-. Of these patients, 297 were obstetrical patients -OBS- and 102 gynaecological ones -GINE-. All patients answered these instruments: General Health Questionnaire -GHQ-7 of 30 items, a subscale of Health and Daily Living for Coping Responses and Life Events Scale.(ABSTRACT TRUNCATED AT 250 WORDS)

Sobre software libre

OpenAIRE

Matellán Olivera, Vicente; González Barahona, Jesús; Heras Quirós, Pedro de las; Robles Martínez, Gregorio

2004-01-01

220 p. "Sobre software libre" reune casi una treintena de ensayos sobre temas de candente actualidad relacionados con el software libre (del cual Linux es su ex- ponente más conocido). Los ensayos que el lector encontrará están divididos en bloques temáticos que van desde la propiedad intelectual o las cuestiones económicas y sociales de este modelo hasta su uso en la educación y las administraciones publicas, pasando por alguno que repasa la historia del software libre en l...

Migration of global radioactive fallout to the Arctic Ocean (on the example of the Ob's river drainage basin).

Science.gov (United States)

Miroshnikov, A; Semenkov, I

2012-11-01

This article provides an assessment of the impact of global fallout on (137)Cs contamination in the bottom sediments of Kara Sea. The erosiveness of 10th-level river basins was estimated by landscape-geochemical and geomorphological characteristics. All 10th-level basins (n=154) were separated into three groups: mountain, mountain-lowland and plain. Four different types of basins were identified depending on the geochemical conditions of the migration of radiocaesium in the plain and mountain-lowland. Classifications of types were carried out using the geographic information systems-based approach. The Ob River's macroarena covers 3.5 million km(2). Internal drainage basins cover 23 % of the macroarena and accumulate whole radiocaesium from the global fallout. The remaining territory is transitional for the (137)Cs. The field research works performed in the three plain first-level basins allow one to estimate the radiocaesium run-off. The calculations show that 7 % of (137)Cs was removed from the first-level basin in arable land. Accumulation of radiocaesium in the first-level basin under undisturbed forest is 99.8 %. The research shows that (137)Cs transfer from the humid basins is in the range of 6.9-25.5 TBq and for semi-humid basins 5.6-285.5 TBq. The areas of these basins cover 40 and 8 % of the Ob River's macroarena, respectively. Drainage lakes and reservoir drainage basins make up 22 % of the macroarena. Mountainous and semi-arid drainage basins cover 7 % of the macroarena.

Oczekiwania klienta pokolenia Y w zakresie sposobu obsługi i oferty biur podróży

OpenAIRE

Przybylska, Anna

2015-01-01

W pracy scharakteryzowano profil klienta w działalności biura podróży oraz rolę, jaką w niej odgrywa. Wskazano na znaczenie odpowiednich relacji z klientem, które wpływają na jego obsługę i zadowolenie. Krótko opisano zarządzanie relacjami z klientem oraz wytyczne do prawidłowego wprowadzenia tych zasad w firmie w celu maksymalizacji zysków. Badania zostały przeprowadzone na grupie konsumentów z przedziału wiekowego charakteryzującego pokolenie Y oraz pokolenie X – w celach ...

Tributos sobre a folha ou sobre o faturamento? Efeitos quantitativos para o Brasil

Directory of Open Access Journals (Sweden)

Tiago V Cavalcanti

2008-09-01

Full Text Available Este artigo estuda os impactos alocativos e de bem-estar de uma reforma tributária que substitui os impostos sobre a folha de salários por outro que incide sobre a receita. Para isso, desenvolve-se um modelo neoclássico de crescimento econômico com impostos sobre a receita e sobre a folha de salários. As simulações com parâmetros da economia brasileira mostram que tal reforma tributária tem um efeito negativo no bem-estar, no estoque de capital de longo prazo e consequentemente no produto per capita de longo prazo. Contudo, o emprego aumenta.This paper studies the impacts of a tax reform which substitutes taxes on labor income by taxes on total revenue. In order to accomplish that, we construct and solve a general equilibrium neoclassical growth model with taxes on labor income and total revenue. The numerical simulations with Brazilian parameters show that such tax reforms would negatively affect welfare, the capital stock, and consequently per capita output. However, employment would increase. Such effects are quantitatively important.

Spodbujanje ustvarjalnosti v poletnih počitniških varstvih, sofinanciranih s strani Mestne občine Ljubljana

OpenAIRE

Grm, Urša

2017-01-01

Spodbujanje ustvarjalnosti skozi umetnost ima ključni pomen pri snovanju novih in različnih idej, izražanju domišljije, kakovostnem preživljanju časa ter izboljšanju kakovosti življenja (Knoll, 2011). Aktivira otrokove intelektualne, čustvene in motivacijske procese (Kroflič in Gobec, 1995). H kakovostnemu preživljanju časa poletnih počitnic prispeva Mestna občina Ljubljana (MOL), ki sofinancira prostočasne in preventivne programe za otroke od 1.–5. razreda osnovne šole s stalnim prebivališče...

Efecto del beneficiado de mezclas de variedades de arroz sobre variables de rendimiento molinero

Directory of Open Access Journals (Sweden)

Manuel Zeled\\u00F3n-Grau

2007-01-01

Full Text Available Efecto del beneficiado de mezclas de variedades de arroz sobre variables de rendimiento molinero. Con el fin de determinar si las variables de rendimiento molinero del arroz (rendimiento de molino, rendimiento de arroz co mer cial e ín di ce de pi la da se afec tan cuan do una va rie dad se be ne fi cia en mez cla con otras, en el Cen tro de In vestigacio nes en Gra nos y Se mi llas (CIGRAS se eva lua ron cua tro mez clas de las tres va rie da des más uti li za das en Cos ta Ri ca en la co se cha 1999-2000 (CR-1113, CR-5272 y Se te sa-9. Otras variables analizadas fueron los por centajes de: grano quebrado, grano quebrado grueso, puntilla, semolina (salvado de arroz, se mo li na pu ra y cas carilla en la semolina. Para cada variable se calculó un índice (Im que ex presa qué tanto el va lor ob te ni do se des vió del va lor esperado para cada una de las mez clas (es pe ra do = pro me dio de los re sultados individua les para cada variedad cuando se la pro cesó sin mezclar. No se encontraron diferencias significativas entre los índices de los tra ta mien tos eva lua dos. Sin em bar go, se ob ser vó un efecto detrimental en las variables de rendimiento molinero de las mez clas en que par ti ci pó CR 5272. Con tra rio a es to, la mezcla CR-1113-Setesa-9 mostró un efecto beneficioso. Los efectos detrimentales observados con el beneficiado de las mez clas fue ron atri bui dos a una ma yor pro duc ción que la esperada de puntilla y de pedazos muy pequeños de arroz en la se mo li na. Por su par te, en la mez cla en la que se re gis tró un efecto beneficioso hubo una menor producción que la esperada de se molina pura y de quebrado grueso. La pérdida económica que causaría la mezcla más perjudicial fue estimada en $ 1 por to ne la da mé tri ca.

Investigación educativa reciente sobre México

OpenAIRE

Núñez-DelaPeña, Francisco J.; Mejía-Arauz, Rebeca

1985-01-01

Se presenta una muestra de la investigación educativa sobre México: 22 disertaciones doctorales aceptadas en universidades norteamericanas entre 1982 y 1984. Dos estudios conciernen a la teoría del capital humano; cinco tratan diversos aspectos relacionados con la administración educativa; uno es sobre la televisión; otro sobre las habilidades fonéticas de los niños; uno más es sobre profesionalización de los médicos; cuatro tocan aspectos de política educativa; tres tratan sobre los maestros...

Paraffin oil as a "methane vector" for rapid and high cell density cultivation of Methylosinus trichosporium OB3b.

Science.gov (United States)

Han, Bing; Su, Tao; Wu, Hao; Gou, Zhongxuan; Xing, Xin-Hui; Jiang, Hao; Chen, Yin; Li, Xin; Murrell, J Colin

2009-06-01

Slow growth and relatively low cell densities of methanotrophs have limited their uses in industrial applications. In this study, a novel method for rapid cultivation of Methylosinus trichosporium OB3b was studied by adding a water-immiscible organic solvent in the medium. Paraffin oil was the most effective at enhancing cell growth and final cell density. This is at least partially due to the increase of methane gas transfer between gas and medium phases since methane solubility is higher in paraffin than in water/nitrate minimal salt medium. During cultivation with paraffin oil at 5% (v/v) in the medium, M. trichosporium OB3b cells also showed higher concentrations of the intermediary metabolites, such as formic acid and pyruvic acid, and consumed more methane compared with the control. Paraffin as methane vector to improve methanotroph growth was further studied in a 5-L fermentor at three concentrations (i.e., 2.5%, 5%, and 10%). Cell density reached about 14 g dry weight per liter with 5% paraffin, around seven times higher than that of the control (without paraffin). Cells cultivated with paraffin tended to accumulate around the interface between oil droplets and the water phase and could exist in oil phase in the case of 10% (v/v) paraffin. These results indicated that paraffin could enhance methanotroph growth, which is potentially useful in cultivation of methanotrophs in large scale in industry.

Análisis sobre la factibilidad de implementar un producto de derivados sobre gas natural en Colombia

OpenAIRE

Dowd Aguirre, Jessica Alexandra; Tirado Naranjo, Lina María

2012-01-01

El objetivo de este trabajo es realizar un análisis sobre la factibilidad de implementar un producto de derivados sobre gas natural en Colombia dado el desarrollo del sector y la importancia de este hidrocarburo como fuente alternativa de generación eléctrica. 73 p. Contenido parcial: Situación actual del mercado de gas natural colombiano -- Expectativas del mercado de gas natural colombiano -- Mercados de derivados sobre gas natural en Europa y Estados Unidos -- Mercado de gas natural ...

THE BOLOCAM GALACTIC PLANE SURVEY. III. CHARACTERIZING PHYSICAL PROPERTIES OF MASSIVE STAR-FORMING REGIONS IN THE GEMINI OB1 MOLECULAR CLOUD

International Nuclear Information System (INIS)

Dunham, Miranda K.; Evans, Neal J.; Harvey, Paul; Merello, Manuel; Rosolowsky, Erik; Cyganowski, Claudia J.; Aguirre, James; Bally, John; Battersby, Cara; Ginsburg, Adam; Glenn, Jason; Stringfellow, Guy S.; Bradley, Eric Todd; Dowell, Darren; Drosback, Meredith; Schlingman, Wayne; Shirley, Yancy L.; Walawender, Josh; Williams, Jonathan P.

2010-01-01

We present the 1.1 mm Bolocam Galactic Plane Survey (BGPS) observations of the Gemini OB1 molecular cloud complex, and targeted NH 3 observations of the BGPS sources. When paired with molecular spectroscopy of a dense gas tracer, millimeter observations yield physical properties such as masses, radii, mean densities, kinetic temperatures, and line widths. We detect 34 distinct BGPS sources above 5σ = 0.37 Jy beam -1 with corresponding 5σ detections in the NH 3 (1,1) transition. Eight of the objects show water maser emission (20%). We find a mean millimeter source FWHM of 1.12 pc and a mean gas kinetic temperature of 20 K for the sample of 34 BGPS sources with detections in the NH 3 (1,1) line. The observed NH 3 line widths are dominated by non-thermal motions, typically found to be a few times the thermal sound speed expected for the derived kinetic temperature. We calculate the mass for each source from the millimeter flux assuming the sources are isothermal and find a mean isothermal mass within a 120'' aperture of 230 ± 180 M sun . We find a total mass of 8400 M sun for all BGPS sources in the Gemini OB1 molecular cloud, representing 6.5% of the cloud mass. By comparing the millimeter isothermal mass to the virial mass calculated from the NH 3 line widths within a radius equal to the millimeter source size, we find a mean virial parameter (M vir /M iso ) of 1.0 ± 0.9 for the sample. We find mean values for the distributions of column densities of 1.0 x 10 22 cm -2 for H 2 , and 3.0 x 10 14 cm -2 for NH 3 , giving a mean NH 3 abundance of 3.0 x 10 -8 relative to H 2 . We find volume-averaged densities on the order of 10 3 -10 4 cm -3 . The sizes and densities suggest that in the Gem OB1 region the BGPS is detecting the clumps from which stellar clusters form, rather than smaller, higher density cores where single stars or small multiple systems form.

Inferencias sobre Grafos

Directory of Open Access Journals (Sweden)

Sira M. Allende

2002-05-01

Full Text Available El estudio de un juego puede ser modelado asumiendo que solo algunas partidas son observadas. Entonces el árbol del juego debe ser estimado utilizando información muestral. Similarmente ocurre al obtener información sobre el comportamiento de las decisiones tomadas por individuos muestreados sobre un árbol de decisión teórico. Al considerar una medida de probabilidad que caracterice el comportamiento de redes aleatorias se puede obtener un estimado del árbol asociado. Este problema es el analizado en este trabajo. Algunos resultados experimentales obtenidos usando Recocido Simulado ilustran el procedimiento. Su papel en el estudio de modelos económicos y de mercadeo es discutido.

The distribution and history of nuclear weapons related contamination in sediments from the Ob River, Siberia as determined by isotopic ratios of plutonium and neptunium

International Nuclear Information System (INIS)

Kenna, T.C.; Sayles, F.L.

2002-01-01

Isotopic ratios of Pu and Np measured in sediment cores from 5 locations in the Ob River drainage basin show clear evidence of input from sources other than global fallout (non-fallout sources). Historical contaminant records obtained by combining isotopic ratio information with chronological information indicate that non-fallout inputs are from several sources that have varied significantly over the past 50 years. Unique isotopic signatures observed in sediments from tributaries that drain areas containing known or suspected sources of non-fallout contamination are used to identify the source of materials in sediments collected at downstream locations. These data can lead to a better understanding of the transport behavior, fate, and relative importance of particle reactive, weapons related contaminants originating from the nuclear facilities Mayak, Tomsk-7, and Semipalitinsk, which lie within the drainage basin. From our work to date, we draw the following conclusions: (1) Persistent non-fallout contamination is observed in the Ob River above its confluence with the Irtysh River, indicating contamination from the Tomsk-7 facility. (2) Non-fallout contamination in the Tobol River above its confluence with the Irtysh River indicates contamination from the Mayak facility. (3) Non-fallout contamination in the Irtysh River above its confluence with the Tobol River indicates contamination from the Semipalitinsk weapons test site. (4) The occurrence of isotopic ratios in Ob Delta sediments that are similar to those observed in source tributaries suggests that contamination from at least two sources has been transported along the length of the river system. (5) Global fallout, a result of high-yield atmospheric weapons tests conducted by the FSU and USA primarily, is the dominant source of Pu and Np to the region; however, there have been brief periods when inputs from non-fallout sources exceeded those from global fallout

TOWARD COMPLETE STATISTICS OF MASSIVE BINARY STARS: PENULTIMATE RESULTS FROM THE CYGNUS OB2 RADIAL VELOCITY SURVEY

Energy Technology Data Exchange (ETDEWEB)

Kobulnicky, Henry A.; Lundquist, Michael J.; Burke, Jamison; Chapman, James; Keller, Erica; Lester, Kathryn; Rolen, Emily K.; Topel, Eric; Bhattacharjee, Anirban; Smullen, Rachel A.; Álvarez, Carlos A. Vargas; Runnoe, Jessie C.; Dale, Daniel A.; Brotherton, Michael M. [Department of Physics and Astronomy, University of Wyoming, Laramie, WY 82070 (United States); Kiminki, Daniel C., E-mail: chipk@uwyo.edu, E-mail: jburke2@swarthmore.edu, E-mail: jc6380@mcla.edu, E-mail: kelle22e@mtholyoke.edu, E-mail: kvl214@lehigh.edu, E-mail: emily.k.rolen@vanderbilt.edu, E-mail: topel@stolaf.edu [Department of Astronomy, University of Arizona, Tucson, AZ 85721 (United States)

2014-08-01

We analyze orbital solutions for 48 massive multiple-star systems in the Cygnus OB2 association, 23 of which are newly presented here, to find that the observed distribution of orbital periods is approximately uniform in log P for P < 45 days, but it is not scale-free. Inflections in the cumulative distribution near 6 days, 14 days, and 45 days suggest key physical scales of ≅0.2, ≅0.4, and ≅1 A.U. where yet-to-be-identified phenomena create distinct features. No single power law provides a statistically compelling prescription, but if features are ignored, a power law with exponent β ≅ –0.22 provides a crude approximation over P = 1.4-2000 days, as does a piece-wise linear function with a break near 45 days. The cumulative period distribution flattens at P > 45 days, even after correction for completeness, indicating either a lower binary fraction or a shift toward low-mass companions. A high degree of similarity (91% likelihood) between the Cyg OB2 period distribution and that of other surveys suggests that the binary properties at P ≲ 25 days are determined by local physics of disk/clump fragmentation and are relatively insensitive to environmental and evolutionary factors. Fully 30% of the unbiased parent sample is a binary with period P < 45 days. Completeness corrections imply a binary fraction near 55% for P < 5000 days. The observed distribution of mass ratios 0.2 < q < 1 is consistent with uniform, while the observed distribution of eccentricities 0.1 < e < 0.6 is consistent with uniform plus an excess of e ≅ 0 systems. We identify six stars, all supergiants, that exhibit aperiodic velocity variations of ∼30 km s{sup –1} attributed to atmospheric fluctuations.

Conocimientos sobre incontinencia urinaria en pacientes hospitalizados

Directory of Open Access Journals (Sweden)

Otto Guillen Lopez

2003-10-01

Full Text Available Objetivo: Determinar el nivel de conocimientos sobre incontinencia urinaria (IU en pacientes hospitalizados. Material y métodos: Estudio transversal, descriptivo; se entrevistó una muestra por saturación de 325 pacientes hospitalizados de 30 años a más del Hospital Nacional Cayetano Heredia (HNCH, Lima - Perú, utilizando un cuestionario de conocimientos sobre incontinencia, considerándose como adecuado conocimiento cuando había más de 50% de aciertos en él. Resultados: Solamente 35.7% tuvieron conocimiento adecuado sobre IU. Hasta 90% conocía acerca del éxito del tratamiento y posibilidad de curación de los pacientes incontinentes. Sin embargo, 75% consideraron erróneamente que la IU era consecuencia inevitable del envejecimiento, mientras menos de 50% de pacientes conocía el papel de ciertos medicamentos y ejercicios en la IU. Conclusiones: Se demostró un pobre conocimiento general sobre la IU, siendo necesaria una intervención de los profesionales de la salud en la educación de la población, sobre todo hospitalizada y con factores predisponentes para desarrollar IU, para así poder modificar las ideas erróneas que existen sobre el tema. (Rev Med Hered 2003; 14: 186-194.

SPITZER IRS SPECTRA OF DEBRIS DISKS IN THE SCORPIUS–CENTAURUS OB ASSOCIATION

Energy Technology Data Exchange (ETDEWEB)

Jang-Condell, Hannah [Department of Physics and Astronomy, University of Wyoming, Laramie, WY 82071 (United States); Chen, Christine H.; Mittal, Tushar; Lisse, Carey M. [Space Telescope Science Institute, 3700 San Martin Dr., Baltimore, MD 21218 (United States); Manoj, P. [Department of Astronomy and Astrophysics, Tata Institute of Fundamental Research, Homi Bhabha Rd., Mumbai 400005 (India); Watson, Dan [Department of Physics and Astronomy, University of Rochester, Rochester, NY 14627 (United States); Nesvold, Erika; Kuchner, Marc [NASA Goddard Space Flight Center, Greenbelt, MD (United States)

2015-08-01

We analyze spectra obtained with the Spitzer Infrared Spectrograph (IRS) of 110 B-, A-, F-, and G-type stars with optically thin infrared excess in the Scorpius–Centaurus OB association. The ages of these stars range from 11 to 17 Myr. We fit the infrared excesses observed in these sources by Spitzer IRS and the Multiband Imaging Photometer for Spitzer (MIPS) to simple dust models according to Mie theory. We find that nearly all of the objects in our study can be fit by one or two belts of dust. Dust around lower mass stars appears to be closer in than around higher mass stars, particularly for the warm dust component in the two-belt systems, suggesting a mass-dependent evolution of debris disks around young stars. For those objects with stellar companions, all dust distances are consistent with truncation of the debris disk by the binary companion. The gaps between several of the two-belt systems can place limits on the planets that might lie between the belts, potentially constraining the mass and locations of planets that may be forming around these stars.

DISERTACIÓN SOBRE JUSTICIA Y EQUIDAD

Directory of Open Access Journals (Sweden)

Sayuri P. Tamura M.

2001-01-01

Full Text Available «Disertación sobre equidad y justicia» es básicamente una respuesta a una inquietud en particular que yo tenía sobre las distintas posiciones que existen sobre estos dos temas y cómo definir cuál es la más acertada. Hice una descripción del punto de vista de Amartya Sen –la violación de los derechos sobre la propiedad privada es justificable si evitan las hambrunas2– frente al de Robert Nozick –la propiedad privada es un derecho fundamental y como tal debe ser respetado3–, sin embargo, aunque ambos enfoques son totalmente contrarios tienen mucho sentido, por lo cual es bastante difícil decidirse por uno en particular. Fue de esta forma, enfrentando sus opiniones, que yo logré desarrollar una posición frente a estas dos perspectivas, y así dar mi opinión al DISERTACIÓN SOBRE JUSTICIA Y EQUIDAD SAYURI P. TAMURA M. Estudiante de Economía y Negocios Internacionales de la Universidad ICESI. respecto. Al final, llegué a una conclusión, que aunque no es la más original y tampoco es la única, tiene mucho sentido y seguramente de ser posible, la situación del país podría cambiar para bien.

Central stars of planetary nebulae. II. New OB-type and emission-line stars

Science.gov (United States)

Weidmann, W. A.; Gamen, R.

2011-07-01

Context. There are more than 3000 confirmed and probably known Galactic planetary nebulae (PNe), but central star spectroscopic information is available for only 13% of them. Aims: We have undertaken a spectroscopic survey of the central stars in PNe to identify their spectral types. Methods: We performed spectroscopic observations at low resolution with the 2-m telescope at CASLEO, Argentina. Results: We present the spectra of 46 central stars of PNe, most of them are OB-type and emission-line stars. Based on data collected at the Complejo Astronómico El Leoncito (CASLEO), which is operated under agreement between the Consejo Nacional de Investigaciones Científicas y Técnicas de la República Argentina y Universidades Nacionales de La Plata, Córdoba y San Juan, Argentina.The reduced spectra (FITS files) are available in electronic form at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/531/A172

Somos un envase : Discursos sobre el aborto

OpenAIRE

Löcher, Jennifer Irene

2014-01-01

No hay persona que no tenga opinión acerca del asunto y, cada vez más, la sociedad argentina debate sobre la pregunta de si se debe legalizar/despenalizar el aborto o no. Nunca antes se habló tanto sobre el tema públicamente: se publican artículos en los diarios, hay manifestaciones a favor y hay manifestaciones en contra de la legalización del aborto. El siguiente trabajo pretende relevar y analizar discursos que circulan socialmente alrededor del debate sobre el aborto. (Párrafo extraíd...

Trayectorias (sobre ruedas): un ensayo visual sobre los carritos de supermercado en la ciudad

OpenAIRE

Cruz, Edgar Gómez

2014-01-01

El siguiente trabajo es un breve bosquejo de las posibilidades del concepto de trabajo “trayectoria”. Una trayectoria no es sólo, en el sentido literal del término, el trazo del movimiento sobre un camino, sino que busca establecer una reflexión sobre las posibilidades de recolección de registros visuales/digitales/móviles para la investigación etnográfica desde la aleatoriedad del movimiento por la ciudad. El concepto de trayectoria busca dialogar con el de “flâneur” de De Certeau y Benjamin...

Los derechos de autor sobre obtenciones vegetales

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Rosario Silva Gilli

2015-01-01

Full Text Available Contenido: Las creaciones en la agricultura. Los derechos de autor sobre obtenciones vegetales. El Convenio Internacional para la protección de las obtenciones vegetales (París 1961 y sus revisiones de Ginebra 1972, 1978,1991 Objeto de la protección legal. Condiciones del cultivar. Alcance de la protección. La protección de obtenciones vegetales en el Mercosur. Los Derechos de autor en el Mercosur. El Protocolo de Armonización de normas sobre Propiedad Intelectual en el Mercosur. El Acuerdo de Cooperación y facilitación sobre la protección de las obtenciones vegetales en los Estados Partes del Mercosur.  Alcance de la normativa Mercosur. Los Derechos sobre cultivares en Uruguay. Los Derechos de autor como derechos humanos. ¿Derechos de autor vs. derecho de propiedad intelectual? Reflexión final

Ensaios sobre economia do empreendorismo

OpenAIRE

Gabrielito Rauter Menezes

2015-01-01

Esta tese é composta por três ensaios sobre Economia do Empreendedorismo. O primeiro deles trata sobre os determinantes do empreendedorismo no Brasil a partir de modelos de escolha ocupacional, usando os microdados da Pesquisa Nacional por Amostra por Domicílios (PNAD) do ano de 2012. A estratégia empírica adotada empregou os modelos de escolha discreta na estimação da escolha ocupacional. Os resultados demonstraram que existem efeitos significativos para as variáveis: anos de estudos iniciai...

Acoustic and Shear-Wave Velocities in Hydrate-Bearing Sediments Offshore Southwestern Taiwan: Tomography, Converted Waves Analysis and Reverse-Time Migration of OBS Records

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Philippe Schnurle

2006-01-01

Full Text Available A 2.5-D combined seismic reflection and refraction survey has been conducted in the accretionary complex offshore of southwestern Taiwan where BSRs (Bottom Simulating Reflectors are highly concentrated and geochemical signals for the presence of gas hydrate are strong. In this study, we perform velocity analysis of the 6 4-component OBS (Ocean-Bottom Seismometer records along the southernmost transect of this seismic experiment. We utilize 3 independent methods in order to accurately determine the acoustic and shear-wave velocities of the sediments: 1-D Root Mean Square (RMS analysis of the P-P and P-S reflected events on individual datumed components, 2-D inversion of the P-P and P-S reflected and refracted events along the in-line transect, and 3-D acoustic inversion of the first arrivals. The principal sources of bias in the determination of the velocities are the 3-dimentional nature of the topography and the complexity of the underlying structures. The three methods result in consistent velocity profiles. Rapid lateral and vertical variations of the velocities are observed. We then investigate the large scale gas hydrate content through rock physic modeling: at the vertical of each OBS, shear-waves velocities are utilized to estimate the water-filled porosities, and the acoustic velocities predicted for a set of gas hydrate, quartz and clay contents are compared to the observed profiles.

MULTI-EPOCH VERY LONG BASELINE ARRAY OBSERVATIONS OF THE COMPACT WIND-COLLISION REGION IN THE QUADRUPLE SYSTEM Cyg OB2 no. 5

Energy Technology Data Exchange (ETDEWEB)

Dzib, Sergio A.; Rodriguez, Luis F.; Loinard, Laurent; Ortiz-Leon, Gisela N.; Araudo, Anabella T. [Centro de Radiostronomia y Astrofisica, Universidad Nacional Autonoma de Mexico, Morelia 58089 (Mexico); Mioduszewski, Amy J., E-mail: s.dzib@crya.unam.mx [National Radio Astronomy Observatory, 1003 Lopezville Road, Socorro, NM 87801 (United States)

2013-02-15

We present multi-epoch Very Long Base Array observations of the compact wind-collision region in the Cyg OB2 no. 5 system. These observations confirm the arc-shaped morphology of the emission reported earlier. The total flux as a function of time is roughly constant when the source is 'on', but falls below the detection limit as the wind-collision region approaches periastron in its orbit around the contact binary at the center of the system. In addition, at one of the 'on' epochs, the flux drops to about a fifth of its average value. We suggest that this apparent variation could result from the inhomogeneity of the wind that hides part of the flux rather than from an intrinsic variation. We measured a trigonometrical parallax, for the most compact radio emission of 0.61 {+-} 0.22 mas, corresponding to a distance of 1.65 {sup +0.96} {sub -0.44} kpc, in agreement with recent trigonometrical parallaxes measured for objects in the Cygnus X complex. Using constraints on the total mass of the system and orbital parameters previously reported in the literature, we obtain two independent indirect measurements of the distance to the Cyg OB2 no. 5 system, both consistent with 1.3-1.4 kpc. Finally, we suggest that the companion star responsible for the wind interaction, yet undetected, is of spectral type between B0.5 and O8.

MULTI-EPOCH VERY LONG BASELINE ARRAY OBSERVATIONS OF THE COMPACT WIND-COLLISION REGION IN THE QUADRUPLE SYSTEM Cyg OB2 no. 5

International Nuclear Information System (INIS)

Dzib, Sergio A.; Rodríguez, Luis F.; Loinard, Laurent; Ortiz-León, Gisela N.; Araudo, Anabella T.; Mioduszewski, Amy J.

2013-01-01

We present multi-epoch Very Long Base Array observations of the compact wind-collision region in the Cyg OB2 no. 5 system. These observations confirm the arc-shaped morphology of the emission reported earlier. The total flux as a function of time is roughly constant when the source is 'on', but falls below the detection limit as the wind-collision region approaches periastron in its orbit around the contact binary at the center of the system. In addition, at one of the 'on' epochs, the flux drops to about a fifth of its average value. We suggest that this apparent variation could result from the inhomogeneity of the wind that hides part of the flux rather than from an intrinsic variation. We measured a trigonometrical parallax, for the most compact radio emission of 0.61 ± 0.22 mas, corresponding to a distance of 1.65 +0.96 –0.44 kpc, in agreement with recent trigonometrical parallaxes measured for objects in the Cygnus X complex. Using constraints on the total mass of the system and orbital parameters previously reported in the literature, we obtain two independent indirect measurements of the distance to the Cyg OB2 no. 5 system, both consistent with 1.3-1.4 kpc. Finally, we suggest that the companion star responsible for the wind interaction, yet undetected, is of spectral type between B0.5 and O8.

A concepção do tempo em Bergson e sua relação com a teoria da relatividade de Einstein

OpenAIRE

Daniel Siqueira Pereira

2008-01-01

A presente dissertação trata da relação entre o conceito de tempo tal como foi pensado pelo filósofo francês Henri Bergson (1859-1941) e pelo físico alemão Albert Einstein (1879-1955). Ambos foram contemporâneos e tiveram a chance de confrontar suas opiniões discordantes sobre a natureza do tempo. Em seu polêmico ensaio Duração e Simultaneidade (1922), Bergson expôs sua teoria sobre tempo, pensado enquanto duração, já levando em conta a teoria da relatividade de Einstein. O ob...

Recursos y enlaces sobre comunidades de aprendizaje

OpenAIRE

Ferrer Esteban, Gerard

2005-01-01

Obras y artículos sobre el proyecto Comunidades de Aprendizaje desarrollado en el Estado español. Tesis doctorales sobre comunidades de aprendizaje. Fundamentación teórica de las comunidades de aprendizaje. Sitios en Internet relacionados con las comunidades de aprendizaje y proyectos afines de desarrollo comunitario en contextos escolares.

Constraining formation of the Eggvin Bank (West of Jan Mayen, N. Atlantic) from OBS data

Science.gov (United States)

Tan, P.; Breivik, A. J.; Mjelde, R.; Azuma, R.

2015-12-01

The anomalously high magma flux in the Eggvin Bank area has triggered new research efforts to better understand the crustal development in this area. The Eggvin Bank is located between the Jan Mayen Island and the west coast of Greenland. Some proposed origins of the Eggvin Bank are: a distinct plume located beneath Jan Mayen; an extension of the Iceland plume; minor spreading or leakage along West Jan Mayen Fracture Zone (WJMFZ); intruded continental crust extending from Jan Mayen Microcontinent (JMMC); and rifted Greenland sub-continental lithospheric mantle. In this first modern refraction seismic study of the Eggvin Bank, we present a 2D velocity model based on OBS data. The OBSs were deployed approx. N-S over the Eggvin Bank with good data quality constrained by 4 OBSs. The air-gun array used during OBS shooting produced good quality reflection data. Three distinct seamounts are observed along the profile: the northern seamount (water depth 730m), has a flat top with a thin sedimentary veneer on top, which indicates it has been eroded at sea surface; while the southern two seamounts, one (water depth 550m) is less flat with around 100m thick sedimentary units on top, another one is rounded with tiny sedimentary veneer on top having the shallowest water depth (460m). This could suggest that the southern seamounts are younger, since they are shallower but without obvious signs that they were subaerially exposed. However, increased cooling of the lithosphere across the WJMFZ in the north may also contribute to depth differences. A normal fault offsetting sedimentary strata (~300 m) in the Greenland Basin indicates recent tectonic activity north of the Eggvin Bank. The velocity modeling shows crustal thickness with large variations, ranging from 8 km to 14 km, where crustal thickness changes of 4-5 km are associated with 20-30 km wide segments with thick crust under the seamounts. The crust consists of three oceanic crustal layers: upper crust (2.8km/s-4.8km

La ceguera como motivo en Ensayo sobre la ceguera de José Saramago e Informe sobre ciegos de Ernesto Sábato

OpenAIRE

Fonseca, Marco Antonio

2008-01-01

El trabajo de investigación, El motivo de la ceguera en el Ensayo sobre la ceguera de José Saramago e Informe sobre ciegos de Ernesto Sábato, analiza desde el área y la metodología de la literatura comparada el uso del motivo literario de la ceguera en los dos textos mencionados, resaltando las similitudes y diferencias del tratamiento del motivo dentro de las dos obras y como éste sostiene una serie de obsesiones e ideas sobre el estado actual del mundo que comparten los autores de las dos n...

O DISCURSO OFICIAL SOBRE A CRIANÇA NO BRASIL

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Carla Letuza Moreira e Silva

2016-09-01

Full Text Available Este estudo é um recorte da tese de doutoramento apresentada em 2012, no Programa de Pós-Graduação e Letras e Linguística da Universidade Federal de Alagoas (UFAL, em Maceió, sobre os discursos da/sobre a criança e as infâncias, no Brasil. O objetivo central é o de apresentar os efeitos de sentido que demandam dos dizeres oficiais no Estatuto da Criança e do Adolescente (ECA, 1990 em vigor no Brasil, sobre a criança, e que determinam modos de pensar e agir sobre as crianças e a infância na contemporaneidade. As noções de sujeito e formação discursiva da análise do discurso francesa (AD, iniciada em Pêcheux (1997, permeiam as análises e elucidam os papéis históricos e ideológicos que determinam e são determinados nos/pelos dizeres dos discursos da/sobre. Faz-se necessário, portanto, adentrar os discursos da e sobre a criança e a infância para entender as contradições e os confrontos dos discursos entre dizeres e silenciamentos.

Variaciones sobre el concepto de ética

OpenAIRE

Pérez Oliva, Elizabeth; Velasco, José Armando

2007-01-01

A lo largo de la historia, pensadores han dado ideas y teorías sobre la ética, pero todos concuerdan en que es una arte de la filosofía que trata de los actos morales, normas de conducta sobre el bien y el mal en el ser humano; término desarrollado a través del tiempo.

Measurement of Circumstellar Disk Sizes in the Upper Scorpius OB Association with ALMA

Science.gov (United States)

Barenfeld, Scott A.; Carpenter, John M.; Sargent, Anneila I.; Isella, Andrea; Ricci, Luca

2017-12-01

We present detailed modeling of the spatial distributions of gas and dust in 57 circumstellar disks in the Upper Scorpius OB Association observed with ALMA at submillimeter wavelengths. We fit power-law models to the dust surface density and CO J = 3–2 surface brightness to measure the radial extent of dust and gas in these disks. We found that these disks are extremely compact: the 25 highest signal-to-noise disks have a median dust outer radius of 21 au, assuming an {R}-1 dust surface density profile. Our lack of CO detections in the majority of our sample is consistent with these small disk sizes assuming the dust and CO share the same spatial distribution. Of seven disks in our sample with well-constrained dust and CO radii, four appear to be more extended in CO, although this may simply be due to the higher optical depth of the CO. Comparison of the Upper Sco results with recent analyses of disks in Taurus, Ophiuchus, and Lupus suggests that the dust disks in Upper Sco may be approximately three times smaller in size than their younger counterparts, although we caution that a more uniform analysis of the data across all regions is needed. We discuss the implications of these results for disk evolution.

Escrito sobre el cuerpo

Directory of Open Access Journals (Sweden)

Antonio Malalana Ureña

2013-09-01

Full Text Available El catálogo, en una edición bilingüe español-inglés, es una pequeña guía de la exposición Shirin Neshat. Escrito sobre el cuerpo, muestra que se integra dentro de los actos de PHOTOESPAÑA13, el festival internacional de fotografía y artes visuales. El esquema del libro es sencillo y los textos son extremadamente divulgativos. El primero de ellos, Escrito sobre el cuerpo (pp. 10-15, cuyo autor es Octavio Zaya, comisario de la exposición, resume la trayectoria de esta intelectual, que "interactúa" con la fotografía y los formatos audiovisuales, y nos presenta la argumentación narrativa de los documentos expuestos, contextualizando la obra recopilada.

Preparedness of Ob/Gyn residents for fellowship training in gynecologic oncology

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David W. Doo

2015-04-01

Full Text Available Residency training in obstetrics and gynecology is being challenged by increasingly stringent regulations and decreased operative experience. We sought to determine the perception of preparedness of incoming gynecologic oncology fellows for advanced surgical training in gynecologic oncology. An online survey was sent to gynecologic oncologists involved in fellowship training in the United States. They were asked to evaluate their most recent incoming clinical fellows in the domains of professionalism, level of independence/graduated responsibility, psychomotor ability, clinical evaluation and management, and academia and scholarship using a standard Likert-style scale. The response rate among attending physicians was 40% (n = 105/260 and 61% (n = 28/46 for program directors. Of those who participated, 49% reported that their incoming fellows could not independently perform a hysterectomy, 59% reported that they could not independently perform 30 min of a major procedure, 40% reported that they could not control bleeding, 40% reported that they could not recognize anatomy and tissue planes, and 58% reported that they could not dissect tissue planes. Fellows lacked an understanding of pathophysiology, treatment recommendations, and the ability to identify and treat critically ill patients. In the academic domain, respondents agreed that fellows were deficient in the areas of protocol design (54%, statistical analysis (54%, and manuscript writing (65%. These results suggest that general Ob/Gyn residency is ineffective in preparing fellows for advanced training in gynecologic oncology and should prompt a revision of the goals and objectives of resident education to correct these deficiencies.

Deformaciones faciales y sus influencias sobre el psiquismo

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Guillermo Nieto Cano

1957-04-01

Full Text Available Creemos haber dejado establecido, en síntesis, que todas las minusvalías físicas repercuten sobre el psiquismo, y que entre éstas las deformaciones faciales, por su ostentosa evidencia, son las que afectan más seriamente al individuo y modifican por eso más radicalmente su conducta, incidiendo así, en forma trascendental, sobre la colectividad. Tales defectos constituyen, por consiguiente, un serio problema humano, cuyo estudio y remedio incumbe no solamente al esteta cirujano, sino que interesa a todos aquellos que puedan influir sobre la estabilidad armónica y la buena marcha de la sociedad en que viven.

Comentarios sobre la Ley de Ordenamiento Territorial Sostenible

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Arturo J. Yglesias

2014-04-01

Full Text Available La denominada Ley de Ordenamiento Territorial Sostenible, no fue bien recibida en el medio jurídico. Tanto los profesores de las diferentes materias de Derecho de nuestra Facultad como las asociaciones profesionales y otros grupos e juristas de nuestro medio, formularon reservas de diverso calibre sobre el texto de la ley que van desde sus aspectos adjetivos como la terminología y redacción hasta cuestiones sustanciales como lo que ella dice sobre el régimen de la propiedad territorial y otras cuestiones vinculadas.Desde el discurso político vimos lanzar opiniones iracundas y alarmistas sobre las modificaciones que la ley estaría haciendo al régimen de la propiedad privada, sobre su supuesta inconstitucionalidad.Nosotros nos vamos a referir a la ley a sus antecedentes y de las críticas que se le hacían, en la parte que toca a nuestra materia, esto es en lo relativo al régimen de la propiedad y debemos decir, a vía de adelanto, que no vemos en ella nada que afecte el derecho de propiedad consagrado por la Constitución de la República, ni los principios generales que regulan la propiedad territorial conforme al Código Civil, conforme a la vieja ley de Centros Poblados, sus modificativas ni demás normas sobre la materia.

Pistas para pensar las significaciones imaginarias sobre la invariancia

OpenAIRE

Bilyk, Pablo Andrés

2011-01-01

Este escrito propone un primer esbozo de nominalizaciones sobre las significaciones imaginarias en torno a la idea de invariancia, con el fin de comenzar a mapear categorías para transitar que nos permitan pensar las construcciones fantasmáticas sobre el no-cambio. En definitiva, se trata de avanzar sobre la problematización de los modos de funcionamiento, constitución y reconfiguraciones de las hegemonías en los entramados sociales contemporáneos. Facultad de Periodismo y Comunicación Soc...

Chronic vitamin A-enriched diet feeding regulates hypercholesterolaemia through transcriptional regulation of reverse cholesterol transport pathway genes in obese rat model of WNIN/GR-Ob strain

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Shanmugam M Jeyakumar

2016-01-01

Full Text Available Background & objectives: Hepatic scavenger receptor class B1 (SR-B1, a high-density lipoprotein (HDL receptor, is involved in the selective uptake of HDL-associated esterified cholesterol (EC, thereby regulates cholesterol homoeostasis and improves reverse cholesterol transport. Previously, we reported in euglycaemic obese rats (WNIN/Ob strain that feeding of vitamin A-enriched diet normalized hypercholesterolaemia, possibly through hepatic SR-B1-mediated pathway. This study was aimed to test whether it would be possible to normalize hypercholesterolaemia in glucose-intolerant obese rat model (WNIN/GR/Ob through similar mechanism by feeding identical vitamin A-enriched diet. Methods: In this study, 30 wk old male lean and obese rats of WNIN/GR-Ob strain were divided into two groups and received either stock diet or vitamin A-enriched diet (2.6 mg or 129 mg vitamin A/kg diet for 14 wk. Blood and other tissues were collected for various biochemical analyses. Results: Chronic vitamin A-enriched diet feeding decreased hypercholesterolaemia and normalized abnormally elevated plasma HDL-cholesterol (HDL-C levels in obese rats as compared to stock diet-fed obese groups. Further, decreased free cholesterol (FC and increased esterified cholesterol (EC contents of plasma cholesterol were observed, which were reflected in higher EC to FC ratio of vitamin A-enriched diet-fed obese rats. However, neither lecithin-cholesterol acyltransferase (LCAT activity of plasma nor its expression (both gene and protein in the liver were altered. On the contrary, hepatic cholesterol levels significantly increased in vitamin A-enriched diet fed obese rats. Hepatic SR-B1 expression (both mRNA and protein remained unaltered among groups. Vitamin A-enriched diet fed obese rats showed a significant increase in hepatic low-density lipoprotein receptor mRNA levels, while the expression of genes involved in HDL synthesis, namely, ATP-binding cassette protein 1 (ABCA1 and

Nové poznatky ze studia mineralogie, fluidních inkluzí a izotopů síry v rudách skarnového ložiska v Obřím dole

Czech Academy of Sciences Publication Activity Database

Pašava, J.; Veselovský, F.; Dobeš, P.; Haluzová, Eva; Ackerman, Lukáš; Tásler, R.

2016-01-01

Roč. 49, č. 1 (2016), s. 47-52 ISSN 0514-8057 R&D Projects: GA ČR GA13-15390S Institutional support: RVO:67985831 Keywords : Obří důl skarn-type deposit * mineralogy * fluid inclusions * sulfur isotopes Subject RIV: DB - Geology ; Mineralogy

Gels and gel-derived glasses in the system Na2O-B2O3-SiO2

Science.gov (United States)

Mukherjee, S. P.

1983-01-01

The containerless melting of high-purity multicomponent homogeneous gels and gel monoliths offers a unique approach to making ultrapure multicomponent optical glasses in the reduced gravity environment of space. Procedures for preparing and characterizing gels and gel-derived glasses in the system Na2O-B2O3-SiO2 are described. Preparation is based on the polymerization reactions of alkoxysilane with trimethyl borate or boric acid and a suitable sodium compound. The chemistry of the gelling process is discussed in terms of process parameters and the gel compositions. The physicochemical nature of gels prepared by three different procedures was found to be significantly different. Infrared absorption spectra indicate finite differences in the molecular structures of the different gels. The melting of the gel powders and the transformation of porous gel monoliths to transparent 'glass' without melting are described.

Narrativas sobre género y sexualidad en médicos mexicanos. Sus implicaciones sobre las regulaciones corporales, sexuales y reproductivas

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Itzel A. Sosa-Sánchez

Full Text Available Resumen A partir de un estudio cualitativo, exploramos los vínculos entre discursos médicos sobre género y sexualidad, y las regulaciones corporales, sexuales y reproductivas en los espacios de salud reproductiva. Entrevistamos a médicos de servicios públicos de salud en México e indagamos sobre las prácticas reproductivas y sexuales de las usuarias, así como sobre las asignaciones sociales y profesionales de cuidado del cuerpo en las relaciones sexuales. Los testimonios revelan cómo los discursos y normatividades sobre género y sexualidad legitiman, en los espacios de salud reproductiva, las desigualdades sociales, especialmente las de género, y la doble moral sexual imperantes en la sociedad mexicana. Las mujeres emergen como saturadas de una sexualidad “desordenada” que debe ser controlada a través de diversas regulaciones corporales, sexuales y reproductivas. Estas regulaciones inciden en el reconocimiento de su autonomía sexual y reproductiva, e impactan negativamente en sus derechos.

Revisitando uma carta em português sobre Sabbatai Zvi

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Rodrigues da Silva Tavim, José Alberto

2007-06-01

Full Text Available The present paper deals with the Iberian context of the production-translation of a text in Portuguese language about Shabbatai Zevi, in 1666. We refer the production of similar texts and the information about the adherents in Spain, mostly in Malaga. We reflect on the various messsianic currents that crossed the different social groups in Portugal. We present a text that proves the spreading of news about Shabbatai in Portuguese Lands, and the interest kindled among the Portuguese Conversos. And we place the hypothesis that this text to the movement of Shabbatai, could have different readings, among them one that could be convenient to the conversos.

Este artículo aborda el contexto de la producción-traducción de un texto en portugués sobre Sabetay Sebí, en 1666. Se alude a la producción de otros textos similares y a la información sobre los adeptos del movimiento en España, sobre todo en Málaga. Se reflexiona sobre las varias corrrientes mesiánicas que cruzaban los diferentes grupos sociales en Portugal. Se presenta un texto que prueba la divulgación de noticias sobre Sabetay, en tierras portuguesas y del interés desperttado entre los medios conversos sobre el movimiento. Y se plantea la hipótesis de que este texto contrario al movimiento de Sabbatai pudiera tener varias lecturas, entre ellas una que debería ser conveniente para los conversos.

OB CITY-Definition of a Family-Based Intervention for Childhood Obesity Supported by Information and Communication Technologies.

Science.gov (United States)

Hu, Ruofei; Cancela, Jorge; Arredondo Waldmeyer, Maria Teresa; Cea, Gloria; Vlachopapadopoulou, Elpis-Athina; Fotiadis, Dimitrios I; Fico, Giuseppe

2016-01-01

Childhood obesity is becoming one of the 21st century's most important public health problems. Nowadays, the main treatment of childhood obesity is behavior intervention that aims at improve children's lifestyle to arrest the disease. Information and communication technologies (ICTs) have not been widely employed in this intervention, and most of existing ICTs systems are not having a long-term effect. The purpose of this paper is to define a system to support family-based intervention through a state-of-the-art analysis of family-based interventions and related technological solutions first, and then using the analytic hierarchy process to derive a childhood obesity family-based behavior intervention model, and finally to provide a prototype of a system called OB CITY. The system makes use of applied behavior analysis, affective computing technologies, as well as serious game and gamification techniques, to offer long term services in all care dimensions of the family-based behavioral intervention aiming to provide positive effects to the treatment of childhood obesity.

REPRESENTAÇÃO SOCIAL DOS ENFERMEIROS SOBRE CUIDADOS PALIATIVOS

OpenAIRE

Coelho de Britto, Sabrina Maria; de Souza Ramos, Raquel; dos Santos, Érick Igor; da Silva Veloso, Olga; Melo da Silva, Aline; de Aguiar Mariz, Rosângela Guiomar

2015-01-01

Introdução: O presente estudo refere-se a um processo de investigação sobre a representação social dos enfermeiros sobre cuidados paliativos. Objetivos: identificar a estrutura das representações sociais dos enfermeiros sobre cuidados paliativos; discutir as repercussões dessas representações no cotidiano da prática assistencial. Materiais e Métodos: Para a realização deste estudo foram abordados 70 enfermeiros que atuam nas enfermarias do serviço de Clínica Médica. A técnica para coleta de d...

An ALMA continuum survey of circumstellar disks in the upper Scorpius OB association

Energy Technology Data Exchange (ETDEWEB)

Carpenter, John M.; Ricci, Luca; Isella, Andrea [Department of Astronomy, California Institute of Technology, MC 249-17, Pasadena, CA 91125 (United States)

2014-05-20

We present ALMA 880 μm continuum observations of 20 K- and M-type stars in the Upper Scorpius OB association (Upper Sco) that are surrounded by protoplanetary disks. These data are used to measure the dust content in disks around low-mass stars (0.1-1.6 M {sub ☉}) at a stellar age of 5-11 Myr. Thirteen sources were detected in the 880 μm dust continuum at ≥3σ with inferred dust masses between 0.3 and 52 M {sub ⊕}. The dust masses tend to be higher around the more massive stars, but the significance is marginal in that the probability of no correlation is p ≈ 0.03. The evolution in the dust content in disks was assessed by comparing the Upper Sco observations with published continuum measurements of disks around ∼1-2 Myr stars in the Class II stage in the Taurus molecular cloud. While the dust masses in the Upper Sco disks are on average lower than in Taurus, any difference in the dust mass distributions is significant at less than 3σ. For stellar masses between 0.49 M {sub ☉} and 1.6 M {sub ☉}, the mean dust mass in disks is lower in Upper Sco relative to Taurus by Δlog M {sub dust} = 0.44 ± 0.26.

Sobre-educación en el mercado laboral colombiano

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Jhon James Mora

2008-12-01

Full Text Available Este artículo analiza la sobre-educación en Colombia con datos de individuos y empresas compilados por el Servicio Nacional de Aprendizaje de Colombia en 2006, encuentra que la probabilidad de estar sobre-educado es del 14% y que depende de la movilidad entre áreas de desempeño, la experiencia, el género, el tamaño de la empresa y el nivel de educación. Los trabajadores sobre-educados ganan un 2% menos que los trabajadores correctamente educados, conforme al patrón internacional. Los resultados también muestran que la probabilidad de que los profesionales permanezcan en la misma área de desempeño aumenta con la experiencia, que cuanto mayor es la sobre-educación menor es la probabilidad de permanecer en dicha área y que los trabajadores con postgrado tienen menor probabilidad de permanecer en su área de desempeño.

Consideraciones del bioderecho sobre la eutanasia en Colombia

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José Antonio García Pereáñez

2017-01-01

Full Text Available Este artículo aborda de manera reflexiva las incidencias del bioderecho sobre situaciones de eutanasia en Colombia, al interpretar conflictos morales y jurídicos suscitados por las sentencias de la Corte Constitucional C239 de 1997, T970 de 2014 y la Resolución del Ministerio de Salud y Protección Social 1216, de 2015. El propósito fundamental es el análisis de las decisiones judiciales sobre el final de la vida humana. Por lo tanto, se realiza una revisión de la construcción histórica y jurídica del concepto de eutanasia y se propone la discusión sobre su manejo jurídico y su influencia en el colectivo moral. Asimismo, se diserta sobre el concepto de dignidad humana y muerte digna, como precedentes para dirimir los conflictos éticos que la eutanasia suscita. Al final, se analiza el caso de don Ovidio González, quien se convirtió en 2015 en el primer colombiano en recibir la eutanasia de manera legal dentro del sistema de salud.

DIRECT IMAGING AND SPECTROSCOPY OF A YOUNG EXTRASOLAR KUIPER BELT IN THE NEAREST OB ASSOCIATION

International Nuclear Information System (INIS)

Currie, Thayne; Lisse, Carey M.; Kuchner, Marc; Madhusudhan, Nikku; Kenyon, Scott J.; Thalmann, Christian; Carson, Joseph; Debes, John

2015-01-01

We describe the discovery of a bright, young Kuiper belt–like debris disk around HD 115600, a ∼1.4–1.5 M ⊙ , ∼15 Myr old member of the Sco–Cen OB Association. Our H-band coronagraphy/integral field spectroscopy from the Gemini Planet Imager shows the ring has a (luminosity-scaled) semimajor axis of (∼22 AU) ∼ 48 AU, similar to the current Kuiper belt. The disk appears to have neutral-scattering dust, is eccentric (e ∼ 0.1–0.2), and could be sculpted by analogs to the outer solar system planets. Spectroscopy of the disk ansae reveal a slightly blue to gray disk color, consistent with major Kuiper belt chemical constituents, where water ice is a very plausible dominant constituent. Besides being the first object discovered with the next generation of extreme adaptive optics systems (i.e., SCExAO, GPI, SPHERE), HD 115600's debris ring and planetary system provide a key reference point for the early evolution of the solar system, the structure, and composition of the Kuiper belt and the interaction between debris disks and planets

DIRECT IMAGING AND SPECTROSCOPY OF A YOUNG EXTRASOLAR KUIPER BELT IN THE NEAREST OB ASSOCIATION

Energy Technology Data Exchange (ETDEWEB)

Currie, Thayne [National Astronomical Observatory of Japan, Subaru Telescope, Hilo, HI (United States); Lisse, Carey M. [Applied Physics Laboratory, The Johns Hopkins University, Laurel, MD (United States); Kuchner, Marc [NASA Goddard Space Flight Center, Greenbelt, MD (United States); Madhusudhan, Nikku [Institute for Astronomy, University of Cambridge, Cambridge (United Kingdom); Kenyon, Scott J. [Harvard-Smithsonian Center for Astrophysics, Cambridge, MA (United States); Thalmann, Christian [ETH-Zurich, Zurich (Switzerland); Carson, Joseph [Department of Physics and Astronomy, The College of Charleston, Charleston, SC (United States); Debes, John [Space Telescope Science Institute, Baltimore, MD (United States)

2015-07-01

We describe the discovery of a bright, young Kuiper belt–like debris disk around HD 115600, a ∼1.4–1.5 M{sub ⊙}, ∼15 Myr old member of the Sco–Cen OB Association. Our H-band coronagraphy/integral field spectroscopy from the Gemini Planet Imager shows the ring has a (luminosity-scaled) semimajor axis of (∼22 AU) ∼ 48 AU, similar to the current Kuiper belt. The disk appears to have neutral-scattering dust, is eccentric (e ∼ 0.1–0.2), and could be sculpted by analogs to the outer solar system planets. Spectroscopy of the disk ansae reveal a slightly blue to gray disk color, consistent with major Kuiper belt chemical constituents, where water ice is a very plausible dominant constituent. Besides being the first object discovered with the next generation of extreme adaptive optics systems (i.e., SCExAO, GPI, SPHERE), HD 115600's debris ring and planetary system provide a key reference point for the early evolution of the solar system, the structure, and composition of the Kuiper belt and the interaction between debris disks and planets.

Celulas solares e sensores de filme fino de silicio depositados sobre substratos flexiveis =

Science.gov (United States)

Pinto, Emilio Sergio Marins Vieira

Celulas solares flexiveis de filmes finos de silicio sao geralmente fabricadas a baixa temperatura sobre substratos de plastico ou a mais elevadas temperaturas sobre folhas de aco. Esta tese reporta o estudo da deposicao de filmes finos sobre diferentes substratos de plastico, transparentes e coloridos, para celulas solares do tipo sobrestrato e substrato, respectivamente. Como objetivo co-lateral, os filmes dopados depositados sobre plastico foram usados como sensores de deformacao, utilizando as suas propriedades piezo-resistivas. Elevadas taxas de deposicao dos filmes de silicio depositados sobre plastico foram obtidas a baixa temperatura do substrato (150ºC) por rf-PECVD. A influencia de diferentes parametros de deposicao sobre as propriedades e taxa de deposicao dos filmes resultantes foram estudados e correlacionados. Celulas solares de filmes finos de silicio amorfo e microcristalino foram desenvolvidas a baixas temperaturas sobre plasticos. Eficiencias de 5 - 6.5% foram alcancadas para as celulas amorfas e 7.5% para as celulas microcristalinas. Efeitos de aprisionamento da luz foram estudados atraves da texturizacao por ablacao laser de substratos de plastico e corrosao umida de TCO sobre plastico. Filmes finos de silicio microcristalino, depositados por HW-CVD, com fator piezoresistivo de -32.2, foram usados para fabricar sensores de deformacao em uma membrana plastica muito fina (15 μm). Estruturas de teste em textil e a miniaturizacao dos sensores piezoresistivos depositados sobre substratos flexiveis de poliimida foram abordados.

CARINA OB STARS: X-RAY SIGNATURES OF WIND SHOCKS AND MAGNETIC FIELDS

International Nuclear Information System (INIS)

Gagne, Marc; Fehon, Garrett; Savoy, Michael R.; Cohen, David H.; Townsley, Leisa K.; Broos, Patrick S.; Povich, Matthew S.; Corcoran, Michael F.; Walborn, Nolan R.; Remage Evans, Nancy; Moffat, Anthony F. J.; Naze, Yael; Oskinova, Lida M.

2011-01-01

The Chandra Carina Complex contains 200 known O- and B-type stars. The Chandra survey detected 68 of the 70 O stars and 61 of 127 known B0-B3 stars. We have assembled a publicly available optical/X-ray database to identify OB stars that depart from the canonical L X /L bol relation or whose average X-ray temperatures exceed 1 keV. Among the single O stars with high kT we identify two candidate magnetically confined wind shock sources: Tr16-22, O8.5 V, and LS 1865, O8.5 V((f)). The O4 III(fc) star HD 93250 exhibits strong, hard, variable X-rays, suggesting that it may be a massive binary with a period of >30 days. The visual O2 If* binary HD 93129A shows soft 0.6 keV and hard 1.9 keV emission components, suggesting embedded wind shocks close to the O2 If* Aa primary and colliding wind shocks between Aa and Ab. Of the 11 known O-type spectroscopic binaries, the long orbital-period systems HD 93343, HD 93403, and QZ Car have higher shock temperatures than short-period systems such as HD 93205 and FO 15. Although the X-rays from most B stars may be produced in the coronae of unseen, low-mass pre-main-sequence companions, a dozen B stars with high L X cannot be explained by a distribution of unseen companions. One of these, SS73 24 in the Treasure Chest cluster, is a new candidate Herbig Be star.

Impuesto sobre las transacciones financieras: Justicia fiscal

OpenAIRE

Mariño, José Ramón

2016-01-01

7 p.[Variante del título de la publicación : Boletín electrónico de Hegoa] [ESP] El Impuesto sobre las transacciones financieras se basa en establecer un gravamen sobre las operaciones financieras con el fin de estabilizar los mercados como consecuencia de la disminución de la especulación a corto plazo. Además es una fuente de financiación de inversiones socialmente deseables. Diez países de la Unión Europea han expresado su deseo de introducir el ITF, sin emba...

Notas sobre Matisia longiflora Gleas. (Bombacaceae Notas sobre Matisia longiflora Gleas. (Bombacaceae

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Fernández Alonso José Luis

1992-09-01

Full Text Available Dentro del grupo de géneros de bombacáceas de hojas simples que componen la tribu Quararibeae (= Matisieae Hutchinson, es Matisia Humb. & Bonpl. el que cuenta con mayor número de especies en Colombia. Al respecto se presentaron recientemente algunas consideraciones preliminares sobre la diversidad de especies en este grupo en Colombia (Fernández Alonso, 1991.

Considerações sobre a prevalência dos tratados internacionais sobre a legislação tributária brasileira: o caso do MERCOSUL

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Maria de Fátima Ribeiro

1997-12-01

Full Text Available This is a study on the main aspects discussed in the Brazilian doctrine and the jurisprudence concerning the prevalence of international treaties and conventions for internal tax legislation. Considerations are made on the Brazilian federate and sovereignty principles and on the competence constitutionally established for all the political entities of the Brazilian State. Article 151, section III of the Federal Constitution must be pointed out for its purpose on stating that the Union shall not exempt the States, the Federal District and the Municipalities from respective taxes. Article 98 of the National Tax Code is also considered for its disposition concerning legislation from international treaties and agreements on tax norms of the positive system currently in force.Trata-se de estudo sobre os principais aspectos discutidos na doutrina e na jurisprudência brasileira sobre a prevalência dos tratados e convenções internacionais sobre a legislação tributária interna. Necessário se faz apresentar considerações sobre o princípio federativo brasileiro, o princípio da soberania e o da competência constitucionalmente estabelecida para todos os entes políticos do Estado brasileiro. Merece maior destaque o art. 151, inciso III da Constituição Federal ao enaltecer que a União não poderá conceder isenções de tributos de competência dos Estados, Distrito Federal e Municípios, bem como a análise do art. 98 do Código Tributário Nacional dispondo sobre as introduções legislativas provenientes de tratados e acordos internacionais sobre as normas tributárias do sistema positivo vigente.

Etnografiando travestis: preguntas, tensiones y aprendizajes sobre el "estar ahí"

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María Soledad Cutuli

Full Text Available Este artículo interroga la construcción de vínculos etnográficos en dos obras pioneras sobre travestis, con una intención retrospectiva sobre la propia investigación en una agrupación de travestis de Buenos Aires. Se reflexiona sobre la implicancia de los/as antropólogos/as "en campo" -en tanto seres sexuados/as y generizados/as- preguntándose además sobre las formas en que son interpeladas/os durante su labor junto a integrantes de organizaciones sociales -en la que el activismo resulta ser la extensión lógica del compromiso a la reciprocidad que subyace en la práctica antropológica.

DISCUTINDO SOBRE SEXTING

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Suzana da Conceição de Barros

2013-07-01

Full Text Available Na contemporaneidade, os sujeitos vêm se utilizando das diversas tecnologias digitais, para exporem e compartilharem sua intimidade, com intuito de seduzirem e tornarem-se visíveis. Esse fenômeno vem sendo chamado de sexting, e vem sendo aderido por sujeitos de várias faixas etárias. Assim, leitor/a, convido você a pensar sobre o sexting e o que a escola tem a ver com essa prática?

Vitamin A decreases pre-receptor amplification of glucocorticoids in obesity: study on the effect of vitamin A on 11beta-hydroxysteroid dehydrogenase type 1 activity in liver and visceral fat of WNIN/Ob obese rats

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Ayyalasomayajula Vajreswari

2011-06-01

Full Text Available Abstract Background 11β-hydroxysteroid dehydrogenase type 1 (11β-HSD1 catalyzes the conversion of inactive glucocorticoids to active glucocorticoids and its inhibition ameliorates obesity and metabolic syndrome. So far, no studies have reported the effect of dietary vitamin A on 11β-HSD1 activity in visceral fat and liver under normal and obese conditions. Here, we studied the effect of chronic feeding of vitamin A-enriched diet (129 mg/kg diet on 11β-HSD1 activity in liver and visceral fat of WNIN/Ob lean and obese rats. Methods Male, 5-month-old, lean and obese rats of WNIN/Ob strain (n = 16 for each phenotype were divided into two subgroups consisting of 8 rats of each phenotype. Control groups received stock diet containing 2.6 mg vitamin A/kg diet, where as experimental groups received diet containing 129 mg vitamin A/Kg diet for 20 weeks. Food and water were provided ad libitum. At the end of the experiment, tissues were collected and 11β-HSD1 activity was assayed in liver and visceral fat. Results Vitamin A supplementation significantly decreased body weight, visceral fat mass and 11β-HSD1 activity in visceral fat of WNIN/Ob obese rats. Hepatic 11β-HSD1 activity and gene expression were significantly reduced by vitamin A supplementation in both the phenotypes. CCAAT/enhancer binding protein α (C/EBPα, the main transcription factor essential for the expression of 11β-HSD1, decreased in liver of vitamin A fed-obese rats, but not in lean rats. Liver × receptor α (LXRα, a nuclear transcription factor which is known to downregulate 11β-HSD1 gene expression was significantly increased by vitamin A supplementation in both the phenotypes. Conclusions This study suggests that chronic consumption of vitamin A-enriched diet decreases 11β-HSD1 activity in liver and visceral fat of WNIN/Ob obese rats. Decreased 11β-HSD1 activity by vitamin A may result in decreased levels of active glucocorticoids in adipose tissue and possibly

Perspectivas sobre la China contemporánea en la prensa española sobre Relaciones Internacionales (2000-2012)

OpenAIRE

Cocina Díaz, Rodrigo

2013-01-01

Un estudio de las perspectivas sobre los últimos años de la evolución histórica de China desde varias fuentes especializadas en política internacional publicadas en España, entre el año 2000 y el 2012, que incluye un análisis sobre el número de artículos publicados a lo largo del tiempo, donde se refleja la evolución del interés por el tema en dichas fuentes. Se han utilizado las revistas Política Exterior, CIDOB d'afers Internacionals, Le Monde Diplomatique en español, y la web del Observato...

Liberalismo versus republicanismo: notas sobre o conceito de liberdade.

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Felipe Nunes

2007-01-01

Full Text Available Este artigo tem como objetivo contrastar as perspectivas liberal e republicana sobre o conceito de liberdade. Através da comparação feita entre os dois modelos tecemos considerações sobre a realidade brasileira tendo como foco o atual estado de crises advindas dos casos de corrupção no país.

Seguridad en redes y sistemas : Técnicas y conceptos sobre hacking y pentesting

OpenAIRE

Jiménez Jiménez, Cristian

2016-01-01

El siguiente documento trata sobre seguridad informática. Se detallarán técnicas y conceptos sobre seguridad en redes y sistemas, pentesting y auditorías de seguridad. El següent document tracta sobre seguretat informàtica. Es detallaran tècniques i conceptes sobre seguretat en xarxes i sistemes, pentesting i auditories de seguretat. The following document is about computer security. Techniques and network security concepts and systems, pentesting and safety practices will be described....

Late Paleozoic closure of the Ob-Zaisan Ocean along the Irtysh/Chara shear zone and implications for arc amalgamation and oroclinal bending in the western Central Asian Orogenic Belt

Science.gov (United States)

Li, Pengfei; Sun, Min; Rosenbaum, Gideon

2016-04-01

The Irtysh/Chara Shear Zone is one of the largest strike-slip systems in the Central Asian Orogenic Belt (CAOB). It records collisional processes of the peri-Siberian orogenic system with the West Junggar-Kazakhstan-Tianshan orogenic system following the closure of the Ob-Zaisan Ocean, but the exact timing of these events remains enigmatic. We conducted detailed structural analysis along the Irtysh Shear Zone (NW China), which together with new geochronological data allows us to reconstruct the tectonic evolution during the final closure of the Ob-Zaisan Ocean. Our results showed that subduction-accretion processes lasted at least until the Late Carboniferous in the Chinese Altai and the East/West Junggar. The subsequent arc amalgamation is characterized by a cycle of crustal thickening, orogenic collapse and transpressional thickening. On a larger scale, the West Junggar- Kazakhstan -Tianshan orogenic system defines a U-shape oroclinal structure (e.g. Xiao et al., 2010). A major phase of oroclinal bending that involved ~110° rotation may have occurred during the Late Devonian to Early Carboniferous (Levashova et al., 2012). Previous authors have linked oroclinal bending with the late Paleozoic amalgamation of the western CAOB, and proposed that a quasi-linear West Junggar- Kazakhstan -Tianshan orogenic system was buckled during the convergence of the Siberian and Tarim cratons following the closure of the Ob-Zaisan Ocean (in the north) and the South Tianshan Ocean (in the south) (e.g. Abrajevitch et al., 2008). This model, however, is not supported by our new data that constrain the closure of the Ob-Zaisan Ocean to the Late Carboniferous. Alternatively, we propose that oroclinal bending may have involved two phases of bending, with the ~110° rotation in the Late Devonian to Early Carboniferous possibly associated with trench retreat. Further tightening may have occurred in response to the convergence of the Siberian and Tarim cratons during the Late

A WIDE-FIELD NARROWBAND OPTICAL SURVEY OF THE BRAID NEBULA STAR FORMATION REGION IN CYGNUS OB7

International Nuclear Information System (INIS)

Magakian, Tigran Yu.; Nikogossian, Elena H.; Movsessian, Tigran; Aspin, Colin; Pyo, Tae-Soo; Khanzadyan, Tigran; Smith, Michael D.; Mitchison, Sharon; Davis, Chris J.; Beck, Tracy L.; Moriarty-Schieven, Gerald H.

2010-01-01

We study the population of Herbig-Haro (HH) flows and jets in an area of Cygnus OB7 designated the Braid Nebula star formation region. This complex forms part of the L 1003 dark cloud, and hosts two FU Orionis (FUor)-like objects as well as several other active young stars. To trace outflow activity and to relate both known and newly discovered flows to young star hosts we intercompare new, deep, narrowband Hα and [S II] optical images taken on the Subaru 8 m Telescope on Mauna Kea, Hawaii. Our images show that there is considerable outflow and jet activity in this region suggesting the presence of an extensive young star population. We confirm that both of the FUor-like objects drive extensive HH flows and document further members of the flows in both objects. The L 1003 star formation complex is a highly kinematically active region with young stars in several different stages of evolution. We trace collimated outflows from numerous young stars although the origin of some HH objects remains elusive.

OB CITY–Definition of a Family-Based Intervention for Childhood Obesity Supported by Information and Communication Technologies

Science.gov (United States)

Hu, Ruofei; Cancela, Jorge; Cea, Gloria; Vlachopapadopoulou, Elpis-Athina; Fotiadis, Dimitrios I.; Fico, Giuseppe

2016-01-01

Childhood obesity is becoming one of the 21st century’s most important public health problems. Nowadays, the main treatment of childhood obesity is behavior intervention that aims at improve children’s lifestyle to arrest the disease. Information and communication technologies (ICTs) have not been widely employed in this intervention, and most of existing ICTs systems are not having a long-term effect. The purpose of this paper is to define a system to support family-based intervention through a state-of-the-art analysis of family-based interventions and related technological solutions first, and then using the analytic hierarchy process to derive a childhood obesity family-based behavior intervention model, and finally to provide a prototype of a system called OB CITY. The system makes use of applied behavior analysis, affective computing technologies, as well as serious game and gamification techniques, to offer long term services in all care dimensions of the family-based behavioral intervention aiming to provide positive effects to the treatment of childhood obesity. PMID:27602306

UN MODELO SOBRE CÓMO LAS ESTRATEGIAS MOTIVACIONALES RELACIONADAS CON EL COMPONENTE DE AFECTIVIDAD INCIDEN SOBRE LAS ESTRATEGIAS COGNITIVAS Y METACOGNITIVAS

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José Manuel Suárez Riveiro

2013-01-01

Full Text Available El principal propósito de este trabajo fue el de proponer un modelo sobre cómo las estrategias motivacionales relacionadas al componente de afectividad inciden sobre la utilización de las estrategias cognitivas y metacognitivas. La muestra utilizada fue de 500 estudiantes de Secundaria. Se asumió que el efecto de las estrategias motivacionales sobre las estrategias cognitivas estaría mediado por el uso de las estrategias metacognitivas. Para estudiar estas estrategias y su relación se realizaron análisis descriptivos y se elaboró un diagrama de senderos. Los resultados mostraron que la estrategia motivacional más utilizada es la de autorrefuerzo y que se establecen relaciones significativas desde algunas estrategias motivacionales, pero no desde todas, con las estrategias cognitivas aunque únicamente la estrategia de autorrefuerzo establece relaciones significativas con la autorregulación metacognitiva.

DUST PROPERTIES AND DISK STRUCTURE OF EVOLVED PROTOPLANETARY DISKS IN Cep OB2: GRAIN GROWTH, SETTLING, GAS AND DUST MASS, AND INSIDE-OUT EVOLUTION

International Nuclear Information System (INIS)

Sicilia-Aguilar, Aurora; Henning, Thomas; Dullemond, Cornelis P.; Bouwman, Jeroen; Sturm, Bernhard; Patel, Nimesh; Juhász, Attila

2011-01-01

We present Spitzer/Infrared Spectrograph spectra of 31 T Tauri stars (TTS) and IRAM/1.3 mm observations for 34 low- and intermediate-mass stars in the Cep OB2 region. Including our previously published data, we analyze 56 TTS and 3 intermediate-mass stars with silicate features in Tr 37 (∼4 Myr) and NGC 7160 (∼12 Myr). The silicate emission features are well reproduced with a mixture of amorphous (with olivine, forsterite, and silica stoichiometry) and crystalline grains (forsterite, enstatite). We explore grain size and disk structure using radiative transfer disk models, finding that most objects have suffered substantial evolution (grain growth, settling). About half of the disks show inside-out evolution, with either dust-cleared inner holes or a radially dependent dust distribution, typically with larger grains and more settling in the innermost disk. The typical strong silicate features nevertheless require the presence of small dust grains, and could be explained by differential settling according to grain size, anomalous dust distributions, and/or optically thin dust populations within disk gaps. M-type stars tend to have weaker silicate emission and steeper spectral energy distributions than K-type objects. The inferred low dust masses are in a strong contrast with the relatively high gas accretion rates, suggesting global grain growth and/or an anomalous gas-to-dust ratio. Transition disks in the Cep OB2 region display strongly processed grains, suggesting that they are dominated by dust evolution and settling. Finally, the presence of rare but remarkable disks with strong accretion at old ages reveals that some very massive disks may still survive to grain growth, gravitational instabilities, and planet formation.

Contabilidad de Costos I. - Problemas sobre contabilización de las actividades relacionadas con los materiales

OpenAIRE

Morillo Moreno, Marysela C.

2008-01-01

ÍNDICE Introducción Problemas sobre terminología básica Problemas básicos sobre el Ciclo de la Contabilidad de Costos Problemas sobre contabilización de las actividades relacionadas con los materiales Problemas sobre la contabilización de las actividades relacionadas con la mano de obra Problemas sobre la contabilización de las actividades relacionadas con los costos indirectos de fabricación Problemas sobre el Ciclo de la Contabilida...

Investigación sobre implementación y gobernanza

DEFF Research Database (Denmark)

Cejudo,, Guillermo M.; May, Peter J.; Sætren, Harald

2018-01-01

. Cejudo, María del Carmen Pardo y Mauricio I. Dussauge Laguna (todos de la División de Ad­ministración Pública del CIDE), cerró con un panel sobre “investigación sobre implementación y gobernanza: direcciones y retos para el futuro”. Lo que sigue es una versión editada de esa discusión de clausura....

Sobre manhãs, humor e atos de fala

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Joana Plaza PINTO

Full Text Available RESUMO Este ensaio apresenta uma trajetória de leituras de Frege a Austin, intermediadas pela interpretação independente e ousada de Kanavillil Rajagopalan. Ao argumentar sobre uma gama de aproximações teóricas entre Frege e Austin, este ensaio narra a importância da interpretação de Rajagopalan para o debate sobre Austin no Brasil.

Orden de no reanimar, consideraciones sobre este problema

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Dr. G. Luis Cereceda

2011-05-01

Se analizan los principales problemas, comenzando por las dificultades según los diferentes escenarios (servicio de urgencia, pabellón de maternidad, sala de hospitalizados, unidad de intensivo, pabellones quirúrgicos; se analiza la incertidumbre sobre el pronóstico de cada pacientes y sobre quién(es deben tomar las decisiones sobre el fin de la vida. Idealmente debe ser el paciente autónomo quien tome la decisión, pero en otros casos se requieren alternativas, una de ellas es la Orden Unilateral. Otros problemas son la Validez de las órdenes de no-RCP en los diferentes tiempos evolutivos, el problema de la Futilidad y la Validez de las “Directivas Anticipadas”, en este grupo resalta el enfoque POLST (Physician’s Order for Life Sustaining Treatment como más comprehensivo; como complemento ha surgido también el concepto AND (Allow Natural Death, que podría estar destinado a remplazar la orden de no-RCP (DNR.

Sobre el Contenido de los Marcos Conceptuales Contables

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Leila Di Russo de Hauque

2007-12-01

Full Text Available El presente trabajo tiene como objetivo el análisis de los distintos marcos conceptuales vigentes en diferentes sistemas normativos contables. Paralelamente a las revisiones empíricas que dicho trabajo determina, incluye reflexiones a priori sobre el contenido de dichos marcos conceptuales. El trabajo discurre inicialmente sobre el problema de la naturaleza normativa o doctrinaria de sus contenidos tradicionales sin inclinarse definitivamente por una u otra vertiente. Respecto de los elementos que se incluirán en ellos, se justifica la inclusión de las listas de objetivos y requisitos de la información contable para definir el alcance del concepto de informe de uso externo. Además se define a favor de la inclusión, conjuntamente con las respuestas a las pregunas básicas sobre la labor contable, de contenidos ligados al proceso de obtención y de la exposición de la información contable de uso externo.

Uma Reflexão sobre Autoria Acadêmica

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Francisco José da Costa

2017-06-01

Full Text Available Este estudo tem como objetivo apresentar elementos para um debate sobre a ética das práticas de autoria no campo científico brasileiro. Os autores utilizam exemplos ilustrativos para explorar as práticas de pseudoautoria, estabelecendo relações entre essas práticas, as coerções oriundas do campo acadêmico e o habitus dos agentes sociais. Foi elaborada uma definição preliminar do que seja autoria a fim de possibilitar a discussão sobre dois problemas centrais, que são: a lógica de “colocar o nome” e o plágio. Uma das principais contribuições deste trabalho repousa na reflexão orientada para a construção de uma prática aperfeiçoada de autoria, possibilitando a crítica e a autocrítica dos agentes do meio acadêmico sobre algumas práticas problemáticas de autoria.

Hegel sobre Tácito y la libertad teutona

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Valerio Rocco Lozano

2015-09-01

Full Text Available Una investigación sobre la presencia (así como sobre la ausencia de Tácito en Hegel es crucial para entender la posición política y filosófica de este pensador, especialmente en la época de Jena. Tras algunas consideraciones sobre el conocimiento hegeliano de la historia y la cultura romanas, se abordará un análisis de su noción de "libertad teutona": Hegel se opone tanto a la neo-romanidad de los revolucionarios franceses como al esencialismo teutómano de los conservadores alemanes (derivado fundamentalmente de un uso fuertemente ideológico de la "Germania" de Tácito, así como a las caducas instituciones imperiales. Esta doble oposición sitúa a Hegel en medio de dos corrientes políticas (e incluso de dos ejércitos en guerra y se lleva a cabo desde una actitud que puede denominarse como “mediación sin nostalgia”

Sobre historia mundial hoy

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Vera Weiler

2001-01-01

Full Text Available Los procesos de globalización son una realidad; su enorme impacto sobre la vida humana los ha convertido en un tema recurrente sobre el que se escribe y se comenta a diario también en Colombia. Los libros que de ellos tratan, ante todo los que 10 hacen en tono crítico, baten records en la industria editorial en todo el mundo. Las expectativas que acerca del futuro abrigan cientos de millones de personas se relacionan con 10 que ellas esperan, para bien o para mal, de la globalización. Las posturas que los gobernantes ocupan al respecto en el mundo son, cuando menos de aceptación, generalmente de activa participación en pos de la globalización. Por un lado, crece la preocupación y se multiplican las protestas; por el otro, dominan los razonamientos de los especialistas en materia de maximización de los rendimientos de los capitales que presentan la globalización, al estilo que se viene imponiendo, como el camino ineludible del gobierno universal de la eficiencia. ¿Tienen que decir algo los historiadores frente a todo esto?.

Reflexões sobre biopoder e pos-colonialismo: relendo Fanon e Foucault

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Cunha Olívia Maria Gomes da

2002-01-01

Full Text Available Autores como Michel Foucault e Franz Fanon têm figurado de forma influente tanto em estudos sobre questões relativas a estratégias de poder e representação em contextos pós-coloniais, quanto em debates e análises de ordem teórica sobre pós-colonialismo. Particularmente, as noções de biopoder e governamentalidade, originárias do pensamento de Foucault, e as reflexões de Fanon sobre a construção de formas de subjetivação racializadas e coloniais, têm ensejado um amplo debate sobre a permanência e circulação de retóricas raciais transnacionais. Através da leitura de David Scott, em Refashioning Futures - Criticism after Postcoloniality (1999, e Paul Gilroy, em Against Race - Imagining Political Culture beyond the Color Line (2000, este ensaio procura identificar a pertinência da combinação de ambos os autores em estudos que, de forma distinta, se debruçam sobre a complexa relação entre corpo e modernidade e suas implicações nos campos político e intelectual contemporâneos.

Pequena monografia sobre o Rio Grande do Sul

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Ana Maria Pinho

2014-05-01

Full Text Available Pequena monografia desenvolvida por membros do Colégio Sevigne, que versa sobre diversos assuntos a respeito do Rio Grande do Sul, divididos em histórico, fronteiras, organização política administrativa, características geográficas, formação geomorfológica, economia, aspectos históricos e geográficos da capital do Estado, generalidades étnicas, e sobre o gaúcho em si. Grande quantidade de ilustrações e poemas enriquecem o artigo.

¿Es obligatoria la Declaración sobre Medios?

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Leonard R. Sussman

2015-01-01

Full Text Available Siempre propició Ciespal la información sobre el Nuevo Orden Mundial de la Información y abrió las páginas de Chasqui para el debate de las dos tendencias contrapuestas. Ciespal lideró la tesis del Nuevo Orden pero mantuvo la objetividad enla información y el equilibrio en los espacios dados al debate. Así, en su primer número trató sobre el Informe MacBride y en el segundo y tercero sobre la posición de los Estados Unidos. A propósito del retiro de este país del seno de la UNESCO la controversia ha tomado un sesgo nuevo. El presente artículo, desde una posición alineada con la tesis de los Estados Unidos, ofrece ciertas conciliaciones. El lector tiene la palabra.

The structure of SSO2064, the first representative of Pfam family PF01796, reveals a novel two-domain zinc-ribbon OB-fold architecture with a potential acyl-CoA-binding role

International Nuclear Information System (INIS)

Krishna, S. Sri; Aravind, L.; Bakolitsa, Constantina; Caruthers, Jonathan; Carlton, Dennis; Miller, Mitchell D.; Abdubek, Polat; Astakhova, Tamara; Axelrod, Herbert L; Chiu, Hsiu-Ju; Clayton, Thomas; Deller, Marc C.; Duan, Lian; Feuerhelm, Julie; Grant, Joanna C.; Han, Gye Won; Jaroszewski, Lukasz; Jin, Kevin K.; Klock, Heath E.; Knuth, Mark W.; Kumar, Abhinav; Marciano, David; McMullan, Daniel; Morse, Andrew T.; Nigoghossian, Edward; Okach, Linda; Reyes, Ron; Rife, Christopher L.; Bedem, Henry van den; Weekes, Dana; Xu, Qingping; Hodgson, Keith O.; Wooley, John; Elsliger, Marc-André; Deacon, Ashley M.; Godzik, Adam; Lesley, Scott A.; Wilson, Ian A.

2010-01-01

The crystal structure of SSO2064, the first structural representative of Pfam family PF01796 (DUF35), reveals a two-domain architecture comprising an N-terminal zinc-ribbon domain and a C-terminal OB-fold domain. Analysis of the domain architecture, operon organization and bacterial orthologs combined with the structural features of SSO2064 suggests a role involving acyl-CoA binding for this family of proteins. SSO2064 is the first structural representative of PF01796 (DUF35), a large prokaryotic family with a wide phylogenetic distribution. The structure reveals a novel two-domain architecture comprising an N-terminal, rubredoxin-like, zinc ribbon and a C-terminal, oligonucleotide/oligosaccharide-binding (OB) fold domain. Additional N-terminal helical segments may be involved in protein–protein interactions. Domain architectures, genomic context analysis and functional evidence from certain bacterial representatives of this family suggest that these proteins form a novel fatty-acid-binding component that is involved in the biosynthesis of lipids and polyketide antibiotics and that they possibly function as acyl-CoA-binding proteins. This structure has led to a re-evaluation of the DUF35 family, which has now been split into two entries in the latest Pfam release (v.24.0)

Nosso passado terá um futuro? Reflexões sobre a arqueologia

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Arno Alvarez Kern

2017-07-01

Full Text Available O homem é uma extraordinária singularidade no mundo dos seres vivos ao se perguntar sobre as suas origens, ao construir discursos míticos ou históricos sobre seu passado e ao escavar o solo e encontrar os arquivos, que contêm os vestígios de seus antecessores. Somos responsáveis por esses milhares de vestígios da cultura material, que nos abrem novas perspectivas através de seu estudo, em busca das respostas que cada geração formula sobre o seu passado e o da humanidade. O artigo evoca reflexões sobre a epistemologia e a função social da arqueologia, destacando a relevância do estudo, a compreensão e a proteção dos testemunhos documentais, para garantir, assim, a sobrevivência do futuro de nosso passado, enquanto humanidade.

NEAR-INFRARED VARIABILITY IN YOUNG STARS IN CYGNUS OB7

Energy Technology Data Exchange (ETDEWEB)

Rice, Thomas S. [Department of Astronomy, Harvard University, 60 Garden Street, Cambridge, MA 02138 (United States); Wolk, Scott J. [Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138 (United States); Aspin, Colin [Institute for Astronomy, University of Hawaii at Manoa, 640 N Aohoku Pl, Hilo, HI 96720 (United States)

2012-08-10

We present the first results from a 124 night J, H, K near-infrared monitoring campaign of the dark cloud L 1003 in Cygnus OB7, an active star-forming region. Using three seasons of UKIRT observations spanning 1.5 years, we obtained high-quality photometry on 9200 stars down to J = 17 mag, with photometric uncertainty better than 0.04 mag. On the basis of near-infrared excesses from disks, we identify 30 pre-main-sequence stars, including 24 which are newly discovered. We analyze those stars and find that the NIR excesses are significantly variable. All 9200 stars were monitored for photometric variability; among the field star population, {approx}160 exhibited near-infrared variability (1.7% of the sample). Of the 30 young stellar objects (YSOs), 28 of them (93%) are variable at a significant level. Of the 30 YSOs, twenty-five have near-infrared excess consistent with simple disk-plus-star classical T Tauri models. Nine of these (36%) drift in color space over the course of these observations and/or since Two Micron All Sky Survey observations such that they cross the boundary defining the NIR excess criteria; effectively, they have a transient near-infrared excess. Thus, time-series JHK observations can be used to obtain a more complete sample of disk-bearing stars than single-epoch JHK observations. About half of the YSOs have color-space variations parallel to either the classical T Tauri star locus or a hybrid track which includes the dust reddening trajectory. This indicates that the NIR variability in YSOs that possess accretion disks arises from a combination of variable extinction and changes in the inner accretion disk: either in accretion rate, central hole size, and/or the inclination of the inner disk. While some variability may be due to stellar rotation, the level of variability on the individual stars can exceed a magnitude. This is a strong empirical suggestion that protoplanetary disks are quite dynamic and exhibit more complex activity on short

Cultura y compromiso afectivo: ¿influyen sobre la transferencia interna del conocimiento?

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Aurora Irma Máynez Guaderrama

2016-01-01

Full Text Available En la nueva economía el conocimiento se reconoce como un activo estratégico, y su transferencia se destaca como una actividad relevante. Por ello, en este trabajo de investigación se examina la influencia de la cultura or ganizacional y del compromiso afectivo sobre la transferencia interna de conocimiento en la empresa; además, se analiza si la cultura de la organización influye significativamente sobre el compromiso afectivo. P ara ello, se llevó a cabo una investigación transversal en una muestra no probabilística de 342 sujetos que laboran en el sector industrial localizado en la frontera norte de México. El análisis estadístico se realizó a través de un modelo de ecuaciones estructurales. Los resultados confirman que la cultura organizacional incide positiva y significativamente sobre la transferencia interna de conocimiento y sobre el compromiso afecti vo. Asimismo, la evidencia empírica apunta que el compromiso afectivo no influye sobre la transferencia interna de conocimiento.

La literatura sobre la industrialización colombiana: Balance y perspectivas

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Paulo César León Palacios

2004-01-01

Full Text Available Este artículo presenta una revisión extensa y analítica de la literatura producida sobre el tema de la industria en Colombia, a través de los ámbitos teórico, metodológico y gnoseológico. Es una referencia necesaria tanto para expertos, en tanto propone un debate global y crítico sobre el tema, como para estudiantes o investigadores que deseen tener una visión panorámica del estado del arte sobre la industrialización sin tener que sumergirse más de lo necesario.

REDUCCION DEL OXIGENO SOBRE CALCOSITA, PIRITA Y GALENA EN MEDIO ALCALINO

OpenAIRE

ORTIZ, JUAN; BARBATO, SALVADOR; GAUTIER, JUAN LUIS

2000-01-01

La electroreducción del oxígeno fue investigada a pH = 14 sobre electrodos de calcosita, pirita y galena mediante voltamperometría cíclica y por voltamperometría estacionaria usando una celda electroquímica de flujo de doble canal (CEFDC). La superficie de los electrodos fue caracterizada mediante consideraciones termodinámicas y cinéticas. En todos lo casos la reducción del O2 ocurre con formación de iones HO2-. Sobre calcosita la reacción de reducción del O2 (RRO) ocurre sobre una superfici...

A Deuteration Survey of Starless Clumps in GemOB1 and the First Quadrant

Science.gov (United States)

Henrici, Andrew; Shirley, Yancy L.; Svoboda, Brian

2018-01-01

One very strong chemical process in star-forming regions is the fractionation of deuterium in molecules, which results in an increase in the deuterium ratio many orders of magnitude over the ISM [D]/[H] ratio and provides a chemical probe of cold, dense regions. Recent maps of dust continuum emission at (sub)millimeter wavelengths have identified tens of thousands of dense clumps of gas and dust. By comparing these regions to infrared and radio surveys, we have identified starless clump candidates which have no evidence for embedded star formation. These objects represent the earliest phase of star formation throughout the Milky Way. One benefit of the Milky Way surveys is that it is also possible to study the chemistry of entire core and clump populations within a single cloud. We used the 10m Heinrich Hertz Submillimeter Telescope to survey starless clump candidates in the First Quadrant identified from the Bolocam Galactic Plane Survey 1.1 mm continuum in the deuterated molecular transitions of DCO+ 3-2 and N2D+ 3-2. We also survey the entire clump population of the Gemini OB1 molecular cloud. In both surveys, we compared detection statistics and compare deuteration fraction to physical properties of the clumps and their evolutionary stage. High resolution ALMA observations of 9 starless clump candidates of the same lines are used to analyze how the cold deuterated gas is spatially distributed in these clumps.

Impacto del cambio de regulación sobre las instalaciones fotovoltaicas

OpenAIRE

Sánchez Herrero, Héctor

2015-01-01

La energía eléctrica es una fuente de energía renovable que se obtiene a través del movimiento de cargas eléctricas (electrones positivos y negativos) producidas en el interior de materiales conductores. El fenómeno de la electricidad en sí no tiene historia. No podemos fijar un origen para ello, salvo por su relación con el ser humano. Una de las teorías que existen es que, por el año 600 a.C., el filósofo Tales de Mileto observó que frotando una varilla de ámbar con una lana o piel se ob...

Influencia del yeso sobre la velocidad de hidratación del cemento portland

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Yamaguchi, G.

1961-12-01

Full Text Available Not availablePara esclarecer la Influencia del yeso sobre el fraguado y endurecimiento del cemento, los autores estudiaron el grado de hidratación de los cuatro principales minerales del clínker de cemento Portland y el efecto del yeso sobre ellas. Haciendo uso del análisis cuantitativo de rayos X, se determinó la porción no hidratada. Simultáneamente, se determinaron los tiempos de fraguado y las resistencias. Los ensayos se llevaron a cabo sobre tres clínkeres sintéticos de diferentes composiciones y sobre dos clínkeres de cemento Portland comerciales.

Spatial clustering of summer temperature maxima from the CNRM-CM5 climate model ensembles & E-OBS over Europe

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Margot Bador

2015-09-01

Full Text Available Reducing the dimensionality of the complex spatio-temporal variables associated with climate modeling, especially ensembles of climate models, is a challenging and important objective. For studies of detection and attribution, it is especially important to maintain information related to the extreme values of the atmospheric processes. Typical methods for data reduction involve summarizing climate model output information through means and variances, which does not preserve any information about the extremes. In order to help solve this challenge, a dependence summary measure appropriate for extreme values must be inferred. Here, we adapt one such measure from a recent study to a larger domain with a different variable and gridded data from observations and climate model ensembles, i.e. E-OBS observations and the CNRM-CM5 model. The handling of such ensembles of data is proposed, as well as a comparison of the spatial clusterings between two different ensembles, here a present-day and a future ensemble of climate simulations. This method yields valid information concerning extremes, while greatly reducing the data set.

Conversaciones sobre el litoral cordillerano

OpenAIRE

Browne,Enrique; Browne,Tomás

2009-01-01

Dos arquitectos dialogan sobre los Andes desde su propia vivencia. El territorio de Chile se entiende como límite natural entre mar y cordillera, donde suceden apretadamente una serie de eventos particulares: fallas geológicas, cerros que penetran en las ciudades y torrentes que bajan al mar caracterizan y diferencian sus paisajes.

Comentarios sobre el artículo de Héctor Sauret: “El proyecto Puiggrós de Ley sobre Regulación del ejercicio de la docencia de la Educación Superior, entre viejos y nuevos paradigmas sobre las universidades privadas”

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Juan Carlos Pugliese

2013-05-01

Full Text Available En el número 1 de DEBATE UNIVERSITARIO se debatió los proyectos de ley alternativos y diversas opiniones sobre la modificación del ejercicio de la docencia de la Educación Superior. Entre dichas opiniones se incluyó un artículo del Dr. Sauret : " El proyecto Puiggrós de Ley sobre Regulación del ejercicio de la docencia de la Educación Superior: entre viejos y nuevos paradigmas sobre las universidades privadas”. En referencia a este material (que puede consultarse en http://ppct.caicyt.gov.ar/index.php/debate-universitario/article/view/1606/pdf se desarrolla el siguiente comentario.

O pensamento freudiano sobre a intolerância

OpenAIRE

Fuks,Betty Bernardo

2007-01-01

A partir do conceito psicanalítico de "narcisismo das pequenas diferenças", o artigo tem como objetivos pensar o modo como Freud foi tecendo um pensamento sobre a intolerância e discutir as contribuições da psicanálise à história das teorias sobre a tolerância. A autora perscruta o fenômeno de intolerância à diferença do outro à luz dos trabalhos de Freud que envolvem e atestam sua sensibilidade para com a intolerância racista que atingiu o tempo em que viveu. Desde este trajeto, propõe algum...

Nuevos documentos sobre Rojas Zorrilla y su teatro

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Madroñal, Abraham

2007-06-01

Full Text Available This article contains twelve unpublished documents on Rojas Zorrilla, related to his biography and literary works (comedias and autos sacramentales. The majority are handwritten by the poet himself, and they provide new information relevant to our knowledge of his life and to the understanding of his works.Se publican una docena de documentos inéditos sobre Rojas Zorrilla referidos a su biografía y a algunas comedias y autos. En buena parte dichos documentos son autógrafos del poeta y añaden o matizan informaciones concretas sobre él y sus obras.

VizieR Online Data Catalog: Extinction law in the Cep OB3b young cluster (Allen+, 2014)

Science.gov (United States)

Allen, T. S.; Prchlik, J. J.; Megeath, S. T.; Gutermuth, R. A.; Pipher, J. L.; Naylor, T.; Jeffries, R. D.

2017-06-01

We use Johnson V and Cousins Rc (hereafter called VR) band phot from the Isaac Newton Telescope (INT), compiled in the catalog of Littlefair et al. (2010, J/MNRAS/403/545). The R-band photometry was obtained using the Sloan r filter. It was calibrated against photometric standard stars measured in the Cousins Rc filter with an arbitrary zero point. Moderate resolution ((λ/Δλ)~1000-2000, FWHM resolution of about 6 Å) optical spectra (covering 4000-9000 Å) were obtained for ~1700 sources toward Cep OB3b using the multi-fiber spectrograph Hectospec on the MMT telescope. About 600 sources were selected for observation because they were determined to be possible cluster members (Allen et al. 2012, J/ApJ/750/125), based on indicators of youth, such as IR emission due to circumstellar dusty material and heightened X-ray activity. We use an extinction map from Allen et al. (2012, J/ApJ/750/125) to initially estimate the extinction toward each source. This map is derived using the 2MASS Point Source Catalog (Skrutskie et al. 2006AJ....131.1163S, Cat. VII/233) H and Ks band photometry of background stars. (1 data file).

Conocimientos sobre derechos y deberes en salud en profesionales de medicina y enfermería, Bucaramanga, Colombia: Conocimientos sobre derechos-deberes en salud

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Ludivia Esther Montaño Villalba

2013-04-01

Full Text Available Objetivo: Describir el nivel de conocimientos que profesionales en medicina y enfermería, que laboran en instituciones de salud públicas y privadas de la ciudad de Bucaramanga (Santander-Colombia, tienen sobre derechos y deberes en salud establecidos en la Constitución Política y en el Sistema General de Seguridad Social en Salud, 2010. Método: Estudio descriptivo, exploratorio, transversal. Se seleccionaron aleatoriamente instituciones, servicios y profesionales participantes. Se indagaron los conocimientos en cinco componentes que cobijaron temas sobre derechos y deberes en salud inscritos en la Constitución Política, en el Sistema General de Seguridad Social colombiano y en la jurisprudencia constitucional; igualmente, se indagó sobre el conocimiento de mecanismos jurídicos para acceder al derecho a la salud en el territorio nacional. Se construyeron promedios en términos de porcentaje total y por componente. Resultados: El promedio global de conocimientos fue 57,7 %, el de conocimientos generales sobre Constitución Política 39,4 % y el de conocimientos sobre el SGSSS 55,1 %. Los profesionales que reportaron mayores niveles de conocimientos fueron: hombres, especialistas administrativos, médicos, personas con mayor experiencia laboral y trabajadores del sector privado. Los egresados menores a cinco años obtuvieron menores promedios de conocimientos. Conclusiones: El nivel de conocimientos en derechos y deberes en salud entre los profesionales de medicina y enfermería en Bucaramanga fue deficiente.A pesar de que el conocimiento de estos temas es central en el desempeño de los profesionales del sector salud, se evidencia a partir de estos resultados, carencia de procesos de formación o educación continuada en el tema de derechos. Salud UIS 2013; 45 (1: 15-22

QUESTÕES SOBRE A PENA DE MORTE

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SOUSA, L.N.

2015-12-01

Full Text Available Pelo menos, desde o Código de Hamurabi as punições para atos desviantes tem sido um foco de reflexão. Este trabalho encerra essa reflexão acerca de aspectos em torno do tema pena de morte. Além de feito político contra o crime, também seria um ato com fins vingativos, fundamentado na violação da dignidade humana, o que justifica a necessidade de haver uma rigorosa análise sobre tal questão, visando os argumentos lógicos, baseados na realidade social brasileira. Alguns estudos demonstram que a percepção da classe menos favorecida é que já existe, de certa forma, uma pena de morte informal no Brasil, praticada pela polícia ou grupos de extermínio. No entanto, diversos setores defendem a pena de morte em nome dos direitos humanos. O debate sobre o referido tema não deve limitar-se às questões relacionadas ao desenvolvimento moral individual, antes deve incluir também a análise de fatores históricos, culturais, econômicos, políticos e ideológicos. Este estudo tem como objetivo coletar dados bibliográficos, bem como dados sobre as opiniões que as pessoas em Campos dos Goytacazes têm sobre a pena de morte. A pesquisa feita é de caráter exploratório. Utilizaram-se as metodologias pertinentes a uma pesquisa bibliográfica. Foi realizada com moradores da cidade de Campos dos Goytacazes/RJ, especificamente com 40 jovens e adultos, de gênero masculino e feminino, com idades entre 18 e 48 anos, sendo a maioria mulheres. A coleta de dados foi feita através de questionários fechados, do tipo likert. Cerca de 48% da amostra concorda com a sentença pena de morte. As respostas quanto a não ter opinião formada sobre o assunto foram minoria, somando 20% ao todo, restando 32% de sujeitos que declararam ser contrários. Metade dos sujeitos não concordou que a sentença seria aplicada corretamente no Brasil. A minoria concordou que a lei teria uma aplicabilidade positiva no país. Aproximadamente 43% dos sujeitos pesquisados

Investigação sobre o desamparo aprendido em humanos

OpenAIRE

Mariana Januario Samelo

2008-01-01

A literatura sobre o desamparo aprendido utilizando humanos como participantes de pesquisa, tem encontrado dificuldades metodologicas. O presente experimento teve como objetivo geral estabelecer um procedimento que permitisse controle experimental suficiente para verificacao do efeito de uma historia de incontrolabilidade, com e sem feedback de erro, sobre a aprendizagem de uma nova resposta operante em sujeitos humanos. Estudantes universitarios foram divididos em quatro grupos (n=10), deno...

EFECTOS DEL MERCURIO SOBRE ALGUNAS PLANTAS ACUÁTICAS TROPICALES

OpenAIRE

Posada, Martha Isabel; Arroyave, María del Pilar

2006-01-01

El presente artículo es una descripción de los efectos del mercurio sobre algunas plantas acuáticas tropicales y sobre los ecosistemas donde habitan. Adicionalmente, se recomienda un protocolo para realizar pruebas de toxicidad con la lenteja de agua (Lemna minor) y se presentan los resultados de los preensayos con diferentes concentraciones de sales de mercurio en condiciones de laboratorio. Se encontró que la biodisponibilidad del mercurio depende de factores que facilitan la disolución del...

META-ESTEREOTIPOS SOBRE LOS INDÍGENAS MAPUCHES DE CHILE

OpenAIRE

José L. Saiz; María Eugenia Merino; Daniel Quilaqueo

2009-01-01

Se examinaron los meta-estereotipos sobre los mapuches chilenos, esto es, la percepción que miembros de este pueblo originario tienen sobre los estereotipos que los chilenos no indígenas les asignan. Se analizaron cinco aspectos de los meta-estereotipos: contenido (atributos), rótulos (etiquetas grupales), pre cisión (congruencia con estereotipos), uniformidad (consenso) y estructura (configuración de atributos y rótulos). Una muestra de 39 adultos mapuches de la Ciudad de Temuco (Chile) resp...

Economic Aspects of Radiation Treatment; Considerations Economiques sur le Traitement par Irradiation; Ehkonomicheskie aspekty obrabotki produktov metodom oblucheniya; Consideraciones Economicas Sobre el Tratamiento por Irradiacion

Energy Technology Data Exchange (ETDEWEB)

Leveque, P. [Centre d' Etudes Nucleaires de Saclay (France)

1966-11-15

pudieron sacar varias conclusiones sobre el costo del tratamiento por medio de fuentes radiactivas y maquinas. Es conveniente, tres aflos despues, revisar las hipotesis fundamentales y, sobre todo, tener en cuenta el abaratamiento de los radioelementos, en particular, del {sup 137}Cs. Esto influye a la vez sobre el precio del kilovatio instalado y del kilovatio-hora de energfa producido. La experiencia adquirida en estos tres ultimos aflos permite precisar los rendimientos y factores de carga observados en instalaciones actualmente en servicio. Es cierto que en la mayorfa de los casos estas consisten en instalaciones de tratamiento de accesorios medicos, pero los problemas son analogos. (author) [Russian] V mae 1963 goda vo vremja raboty Konferencii po promyshlennomu primeneniju moshhnyh istochnikov izluchenija, organizovannoj MAGATJe, razvernulas' bol'shaja diskussija po voprosu sebestoimosti. V rezul'tate obmena mnenijami mozhno sdelat' nekotorye ocenki stoimosti obrabotki radioaktivnymi istochnikami i ustrojstvami. Zhelatel'no po istechenii treh let peresmotret' osnovnye gipotezy i uchest' snizhenie stoimosti radiojelementov, i v osobennosti cezija-137. Stoimost' radiojelementov okazyvaet vlijanie srazu na stoimost' 1 kvt ustanovlennoj moshhnosti i kilovatt/chasa proizvodimoj jelektrojenergii. V svete poluchennogo v techenie poslednih treh let opyta imeetsja vozmozhnost' utochnit' proizvoditel'nost' i kojefficient nagruzki dejstvujushhih v nastojashhee vremja ustanovok; Rech' idet v bol'shinstve sluchaev ob obrabotke vspomogatel'nogo medicinskogo oborudovanija, no vse jeti problemy sravnimy. (author)

Obtenção de nanocompósitos, nanodiamante sobre fibra de carbono e nanotubo de carbono sobre fibra de carbono

OpenAIRE

Leonardo Iusuti de Medeiros

2009-01-01

A proposta desta dissertação é a obtenção de dois compósitos nanoestruturados que sejam constituídos um por nanodiamante sobre fibra de carbono e, o outro, por nanotubo de carbono sobre a fibra de carbono. Em ambos os compósitos as fibras de carbono usadas são obtidas com três diferentes índices de grafitização 1000, 1500 e 2000°C. As fibras de carbono apresentam uma grande área superficial devido a sua estrutura. Quando utilizadas como substrato para crescimento de materiais nanoestruturados...

[Comparing the Application of Hema-Obs RSS to 250 Pregnancies from Obstetrics/Hematology Consultation in Centro Hospitalar São João, Portugal with the Application of Galit Sarig RSS to 90 Pregnancies from Rambam Health Care Campus, Israel].

Science.gov (United States)

Salselas, Ana; Pestana, Inês; Bischoff, Francisco; Guimarães, Mariana; Andrade, Joaquim Aguiar

2015-01-01

Pregnant women with thromboembolic diseases, previous thrombotic episodes or thrombophilia family history were supervised in a multidisciplinary Obstetrics/ Hematology consultation in Centro Hospitalar São João EPE, Porto, Portugal. For the evaluation and medication of these women, a risk stratification scale was used. The aim of this study was to validate a Risk Stratification Scale and thromboprophylaxis protocol by means of comparing it with a similar scale, developed and published by Sarig. We have compared: The distribution, by risk groups, obtained through the application of the two scales on pregnant women followed at Centro Hospitalar São João, Porto, Portugal, consultation; the sensibility and specificity for each one of the scales (DeLong scale, applied to Receiver Operating Characteristic) curves; the outcomes in pregnancies followed in Hospital São João, Porto, PortugalResults: According to our Hema-Obs risk stratification scale, 29% were allocated to low-risk, 47% to high-risk and 24% to very-high-risk groups. According to Galit Sarig risk stratification scale, 24% were considered low-risk, 53% moderate, 16% high-risk and 7% as very high-risk group. In our study we observed 9% of spontaneous abortions, in comparison with 18% in the Galit Sarig cohort. From the application of Receiver Operating Characteristic curve to both risk stratification scales, the results of the calculated areas were 58,8% to our Hema-Obs risk stratification scale and 38,7% to Galit Sarig risk stratification scale, with a Delong test significancie of p = 0.0006. We concluded that Hema-Obs risk stratification scale is an effective support for clinical monitoring of therapeutic strategies.

A pesquisa no ensino, sobre o ensino e sobre a reflexão dos professores sobre seus ensinos The research in teaching, on teaching and on the teachers' reflection about their teaching

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Anna Maria Pessoa de Carvalho

2002-07-01

Full Text Available Este texto busca mostrar o trabalho desenvolvido no LaPEF (Laboratório de Pesquisa e Ensino de Física, no qual professores do ensino fundamental e médio que vêm trabalhando conosco no contexto dos projetos Fapesp/Escola Pública, pesquisadores que fazem seus mestrados e doutorados e professores da Faculdade de Educação da USP desenvolvem pesquisas no ensino, sobre o ensino e sobre a reflexão dos professores sobre seus ensinos, isto é, sobre formação de professores. Essas três modalidades de pesquisa foram se desenvolvendo a partir da seguinte questão: como o ensino que planejamos, com os pressupostos teóricos que escolhemos, baseados em resultados de pesquisas que já realizamos, estão modificando os alunos? Os problemas que dão origem às pesquisas no ensino são percebidos pelos professores durante as aulas nas escolas públicas e depois são debatidos e transformados em questões de investigação, por esse mesmo grupo, em discussões coletivas no LaPEF. As pesquisas sobre o ensino estão sendo elaboradas por mestrandos e doutorandos a fim de verificar algumas variáveis importantes para o desenvolvimento desse ensino. A diferença fundamental entre esses dois tipos de pesquisas não está em quem a faz, mas nos objetivos que pretendem alcançar. As pesquisas sobre a reflexão dos professores sobre o ensino abordam a problemática da formação continuada dos professores. Esse artigo pretende enfocar como esses três níveis de investigações se inter-relacionam, quais as semelhanças e diferenças entre eles, descrevendo principalmente os objetivos de cada um dos grupos e como esses definem diferentes problemas com distintas estruturas de coleta e análise de dados.This text expounds the work carried out at the LaPEF - Laboratory for the Research and Teaching of Physics - where elementary and high school teachers which have been working with us in projects of the FAPESP/Public School program, graduate students, and teachers

Implementación del servicio de voz sobre IP en redes Linux y redes telefónicas análogas, utilizando software de comunicación sobre Linux

OpenAIRE

Campos, Jorge Alberto; Guzmán, Mauricio Orlando; González Jiménez, Francisco Alirio

2007-01-01

Implementación del servicio de voz sobre IP en redes Linux y redes telefónicas análogas, utilizando software de comunicación sobre Linux La tecnología de voz sobre protocolos de comunicación TCP/IP (VoIP, Voice over IP) es la que permite la transmisión de la voz a través de redes digitales (LAN WAN, INTERNET, etc) en forma de paquetes de datos, utilizando para ello la infraestructura de intercambio de datos instalada. La telefonía IP es una aplicación inmediata de esta tecnología de forma ...

Terraplenes sobre suelos colapsables

OpenAIRE

Arnedo Gaute, Diego

2004-01-01

Esta tesina está motivada por el diseño y construcción del Canal Segarra-Garrigues. El trazado del canal atraviesa varios pequeños valles de fondo llano mediante terraplenes sobre los cuales circula el canal. En estas vaguadas se encuentran suelos limo-arcillosos de baja densidad cuya potencia puede llegar a ser de varios metros. Estos materiales, debido a su estructura abierta, son potencialmente colapsables una vez cargados si experimentan incrementos de humedad. Las deformacion...

Concentration urinaire de bisphénol A et obésité chez les adultes : résultats de l’Enquête canadienne sur les mesures de la santé

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Minh T. Do

2017-01-01

Full Text Available Introduction : Des études chez l’animal ont révélé que l’exposition au bisphénol A (BPA affecte le métabolisme des lipides et favorise la prise de poids. Des études épidémiologiques récentes appuient aussi l’existence d’un lien entre le BPA et l’obésité chez l’humain, mais la plupart d’entre elles se limitent à une seule mesure de l’adiposité ou ne tiennent pas compte des facteurs de confusion alimentaires possibles. Cette étude vise à examiner les associations entre les concentrations urinaires de BPA et les mesures de l’adiposité dans un échantillon national représentatif des adultes canadiens. Méthodologie : Nous avons réalisé des analyses à l’aide de données de biosurveillance et de données anthropométriques mesurées directement auprès de 4 733 adultes de 18 à 79 ans dans le cadre de l’Enquête canadienne sur les mesures de la santé (2007-2011. Nous avons utilisé des modèles de régression logistique multinomiale et binaire pour estimer les associations entre, d’une part, les concentrations urinaires de BPA et, d’autre part, les diverses catégories d’indice de masse corporelle (IMC (embonpoint par opposition à poids insuffisant ou normal; obésité par opposition à poids insuffisant ou normal et un tour de taille élevé (102 cm ou plus pour les hommes; 88 cm ou plus pour les femmes en tenant compte des facteurs de confusion possibles. Des analyses de régression linéaire ont aussi été effectuées pour évaluer les associations entre les concentrations urinaires de BPA et des mesures de l’IMC et du tour de taille. Résultats : On a pu associer positivement la concentration urinaire de BPA et l’obésité (définie par l’IMC. Le rapport de cotes s’est situé à 1,54 (intervalle de confiance [IC] à 95 % : 1,002 à 2,37 dans le quartile de BPA le plus élevé par rapport au plus bas (test de tendance, p = 0,041. La concentration urinaire de BPA n’a pas été associ

Primary successions of vegetation on technogenic sand patches in oil and gas producing districts of the middle Ob' river basin

Energy Technology Data Exchange (ETDEWEB)

Shilova, I I

1977-11-01

Intensive economic exploitation of the natural resources of the oil-and-gas producing districts of the central Ob' basin has led to increased exposure of sandy patches over the landscape. These sandy areas are becoming a common site. Technogenic factors involved include, for example, construction projects, oil-drilling and the like. Exposure is accelerated by wind and water erosion. Efforts are underway to reintroduce verdure in the region, and a study has been underway of the features of the ecotope and the stages of natural overgrowth of the area of reclamation. This overgrowth is proceeding well. Vegetation is of the syngenetic succession type, involving four successive stages and formation of associations of a zonal character. Seventy-four species of yeast, 2 species of fungi, 2 of lichens, 19 of Bryophyton and 106 of vascular spore- and covered-seed plants of the area have been recorded, and are tabulated. Recultivation will require due attention to existing conditions. 14 references.

Conocimientos de los pediatras de Salvador, Brasil, sobre la vacuna antisarampionosa

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Moreira Luiza A. Cabus

1997-01-01

Full Text Available El éxito de las iniciativas internacionales para la erradicación del sarampión depende en gran medida del grado de conocimiento sobre la vacunación. En 1992 se evaluaron mediante un estudio transversal los conocimientos sobre la vacuna antisarampionosa de los pediatras de la ciudad brasileña de Salvador, Bahia. Del total de 506 pediatras residentes en la ciudad, 299 (59% pudieron ser localizados y respondieron a un cuestionario de 15 preguntas en las que se planteaban situaciones hipotéticas sobre indicaciones y contraindicaciones de esta vacuna. El promedio de aciertos fue de 9,3 preguntas de las 15, lo que muestra el poco conocimiento de los pediatras sobre la vacunación antisarampiososa. Situaciones comunes en la práctica pediátrica brasileña -desnutrición, infección de vías respiratorias altas, diarrea y estado prematuro- fueron a menudo erróneamente consideradas como contraindicaciones para la inmunización. Más de la mitad (62% de los pediatras no conocían la vía correcta de administración de la vacuna. Los conocimientos sobre la vacuna no variaron en función del tiempo transcurrido desde la formación universitaria del pediatra o de su trabajo en centros sanitarios de la Secretaría Estatal de Salud. Los profesores universitarios, los pediatras con maestría y los que cursaban estudios de posgrado tuvieron una media de aciertos ligeramente superior a la del resto. Estos resultados indican la necesidad de reforzar la enseñanza sobre la vacunación antisarampionosa en las facultades de medicina y en los programas de formación continuada para pediatras.

Conocimientos de los pediatras de Salvador, Brasil, sobre la vacuna antisarampionosa

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Luiza A. Cabus Moreira

1997-12-01

Full Text Available El éxito de las iniciativas internacionales para la erradicación del sarampión depende en gran medida del grado de conocimiento sobre la vacunación. En 1992 se evaluaron mediante un estudio transversal los conocimientos sobre la vacuna antisarampionosa de los pediatras de la ciudad brasileña de Salvador, Bahia. Del total de 506 pediatras residentes en la ciudad, 299 (59% pudieron ser localizados y respondieron a un cuestionario de 15 preguntas en las que se planteaban situaciones hipotéticas sobre indicaciones y contraindicaciones de esta vacuna. El promedio de aciertos fue de 9,3 preguntas de las 15, lo que muestra el poco conocimiento de los pediatras sobre la vacunación antisarampiososa. Situaciones comunes en la práctica pediátrica brasileña -desnutrición, infección de vías respiratorias altas, diarrea y estado prematuro- fueron a menudo erróneamente consideradas como contraindicaciones para la inmunización. Más de la mitad (62% de los pediatras no conocían la vía correcta de administración de la vacuna. Los conocimientos sobre la vacuna no variaron en función del tiempo transcurrido desde la formación universitaria del pediatra o de su trabajo en centros sanitarios de la Secretaría Estatal de Salud. Los profesores universitarios, los pediatras con maestría y los que cursaban estudios de posgrado tuvieron una media de aciertos ligeramente superior a la del resto. Estos resultados indican la necesidad de reforzar la enseñanza sobre la vacunación antisarampionosa en las facultades de medicina y en los programas de formación continuada para pediatras.

Conocimientos, actitudes y prácticas sobre la prueba de Papanicolaou

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Fernando Bazán

2007-03-01

Full Text Available Objetivos: Determinar los conocimientos, actitudes y prácticas con respecto a la prueba de Papanicolaou (Pap; hallar la asociación entre la edad y grado de instrucción frente a dichas variables y describir las características sobre la práctica periódica del Pap. Diseño: Analítico y transversal. Lugar: Hospital Nacional Docente Madre-Niño ‘San Bartolomé’. Pacientes: Mujeres en edad fértil de consultorios externos. Intervenciones: Cuestionario estructurado, auto-desarrollado, durante noviembre-2005 a enero-2006. Para el análisis estadístico se utilizó: X2, t student, Anova y OR. Principales medidas de resultados: Nivel de conocimientos, actitudes y prácticas en mujeres sobre el Pap, y asociaciones y características sobre su práctica periódica. Resultados: De 501 encuestadas, en 63% se encontró nivel bajo de conocimiento, en 66% una actitud desfavorable y en 71% una práctica incorrecta sobre la prueba de Papanicolaou; se obtuvo un OR = 1,45 (IC = 0,98 a 2,16 entre el nivel de conocimiento y la práctica correcta; la difusión por los medios de comunicación sobre el Pap fue 6,2% y la mayor barrera para no tener una práctica periódica del Pap fue el género masculino del ejecutor (34,2%. Conclusiones: Los niveles de conocimiento, actitudes y prácticas, en nuestra población, son bajos. El mayor nivel de conocimiento no está relacionado con la práctica correcta del Pap. Existe poca difusión sobre el Pap por los medios de comunicación y las limitantes a que las mujeres se tomen el Pap son principalmente psicológicas.

Discussions about the Nature of Science in a Course on the History of Astronomy. (Spanish Title: Discusiones sobre la Naturaleza de la Ciencia en un Curso sobre Historia de la Astronomía.) Discussões sobre a Natureza da Ciência em um Curso sobre a História da Astronomia

Science.gov (United States)

Pires de Andrade, Victória Flório; L'Astorina, Bruno

2010-07-01

There are an increasing number of researches in science education that affirm the importance of discussions on the "nature of science" in basic education level as well as in teacher training. The history of science applied to education is a way to contextualize epistemological discussions, allowing both the understanding of scientific content and learning about science concepts. We present some reasonably consensual definitions on the nature of science that have been widely discussed by the academic community. We show also some episodes in the history of astronomy which can lead to discussions involving some aspects of the nature of science, and how they can do it. Hay un número creciente de investigaciones en la enseñanza de las ciencias que afirman la importancia de debates sobre la "naturaleza de la ciencia" en la educación básica y formación del profesorado. La historia de la ciencia aplicada a la educación es una manera de contextualizar los debates de la epistemología, lo que permite tanto la comprensión de los contenidos científicos como el aprendizaje de conceptos científicos. En esto trabajo, presentamos algunas definiciones bastante consensuales sobre la naturaleza de la ciencia que han sido ampliamente discutidas por la comunidad académica y mostramos cómo algunos episodios en la historia de la astronomía pueden llevar a discusiones sobre algunos aspectos de la naturaleza de la ciencia. Há um número crescente de pesquisas na área de ensino de ciências que afirmam a importância de discussões sobre a "natureza da ciência" na educação básica e na formação de professores. A história da ciência aplicada ao ensino é uma maneira de contextualizar discussões epistemológicas, permitindo tanto a compreensão de conteúdos científicos quanto o aprendizado de noções sobre as ciências. Neste trabalho apresentamos algumas definições razoavelmente consensuais sobre a natureza da ciência que foram amplamente discutidas pela

Narrativas de professoras sobre o TDAH: um estudo de caso coletivo

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Lílian Marx Flor Landskron

Full Text Available O Transtorno de Déficit de Atenção e Hiperatividade (TDAH, considerado o transtorno de desenvolvimento infantil mais diagnosticado na atualidade, apresenta-se como tema freqüente e controverso na sociedade e grande desafio nas escolas. Os professores enfrentam situações que fogem às suas expectativas e buscam organizar o entendimento a partir de discursos discrepantes. Os valores e significados que subjazem as concepções sobre o TDHA se refletem no modo como as pessoas manejam a situação. Este estudo investigou a percepção de professores sobre o TDAH e salientou a complexidade do fenômeno ao abordar a diversidade de influências que o envolve. Utilizando o método da entrevista narrativa, foram analisadas histórias de nove professoras sobre uma experiência com um aluno diagnosticado. Os resultados indicam que a percepção das professoras sobre o transtorno é individualizante, patologizante, e o conhecimento, inconsistente. Os dados sugerem que este tema deve ser debatido em maior profundidade pela sociedade.

Conhecimento de puérperas sobre amamentação exclusiva

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Nichelle Monique da Silva

2014-04-01

Full Text Available Estudo descritivo de abordagem qualitativa cujo objetivo foi identificar o conhecimento das puérperas sobre aleitamento materno exclusivo. Participaram do estudo treze puérperas internadas no Alojamento Conjunto de uma instituição pública na região de Caxias do Sul-RS. Para a coleta dos dados utilizou-se a entrevista semiestruturada. A análise de dados foi realizada através de análise temática, emergindo três categorias: o conhecimento sobre amamentação exclusiva; o processo de amamentação; e as influências das informações recebidas sobre o processo de amamentação. Mesmo recebendo informações de profissionais de saúde no período pré-natal sobre a amamentação, é possível compreender a necessidade de melhorar a comunicação e o acompanhamento das puérperas por estes profissionais, como uma continuidade no cuidado, no período do puerpério imediato, tardio e também no remoto.

Avisos de salud sobre el PFOA y PFOS en el agua potable

Science.gov (United States)

La EPA estableció avisos de salud sobre el ácido perfluorooctanoico (PFOA) y el sulfonato de perfluorooctano (PFOS) para proporcionar información a los operadores de sistemas de agua potable y funcionarios estatales, tribales y locales sobre los riesgos de

Últimos trabajos sobre ladrillos huecos y perforados

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Editorial, Equipo

1958-10-01

Full Text Available Not availableEn la Building Research Station se están llevando a cabo, cada día con resultados positivos más alentadores, investigaciones sobre nuevos tipos de ladrillos huecos y perforados. Es de esperar que, en breve, todos estos estudios den lugar a la aparición de unas normas para su empleo en escala industrial y, precisamente ahora, es, en Inglaterra, el momento oportuno, puesto que, actualmente, está celebrando reuniones la Sociedad Cerámica Británica. Lo que se publica en este artículo es un anticipo sobre las tendencias actuales dentro da este campo.

Biogeochemical migration of heavy metals, Ti, V, Mo, Ta, W, and U, in the profile of a low-laid peatbog in the country between the Ob and Tom rivers

International Nuclear Information System (INIS)

Efremova, T.T.; Efremov, S.P.; Koutsenogii, K.P.; Peresedov, V.F.

2003-01-01

Biogeochemical migration of heavy metals in the course of marsh formation is mainly determined by physical-chemical processes, such as the oxidation-reduction zonality of the peatbog thickness and the state of humous substances (the quality of humus adsorptive barriers). In the process of peatbog formation V, U, Ta are the weakly captured elements while Mo is captured to a relatively higher extent. Elements as Ti and W are found in separate layers. No technogenic degradation of the marsh ecosystem in the Ob and Tom has been observed. (author)

Extended Gamma-Ray Emission from the G25.0+0.0 Region: A Star-forming Region Powered by the Newly Found OB Association?

Energy Technology Data Exchange (ETDEWEB)

Katsuta, J. [Department of Physical Sciences, Hiroshima University, Higashi-Hiroshima, Hiroshima 739-8526 (Japan); Uchiyama, Y. [Rikkyo University, Nishi-Ikebukuro, Toshima-ku, Tokyo 171-8501 (Japan); Funk, S., E-mail: katsuta@hep01.hepl.hiroshima-u.ac.jp [Erlangen Centre for Astroparticle Physics, D-91058 Erlangen (Germany)

2017-04-20

We report a study of extended γ -ray emission with the Large Area Telescope (LAT) on board the Fermi Gamma-ray Space Telescope , which is likely to be the second case of a γ -ray detection from a star-forming region (SFR) in our Galaxy. The LAT source is located in the G25 region, 1.°7 × 2.°1 around ( l , b ) = (25.°0, 0.°0). The γ -ray emission is found to be composed of two extended sources and one pointlike source. The extended sources have similar sizes of about 1.°4 × 0.°6. An ∼0.°4 diameter subregion of one has a photon index of Γ = 1.53 ± 0.15, and is spatially coincident with HESS J1837−069, likely a pulsar wind nebula. The other parts of the extended sources have a photon index of Γ = 2.1 ± 0.2 without significant spectral curvature. Given their spatial and spectral properties, they have no clear associations with sources at other wavelengths. Their γ -ray properties are similar to those of the Cygnus cocoon SFR, the only firmly established γ -ray detection of an SFR in the Galaxy. Indeed, we find bubble-like structures of atomic and molecular gas in G25, which may be created by a putative OB association/cluster. The γ -ray emitting regions appear confined in the bubble-like structure; similar properties are also found in the Cygnus cocoon. In addition, using observations with the XMM-Newton , we find a candidate young massive OB association/cluster G25.18+0.26 in the G25 region. We propose that the extended γ -ray emission in G25 is associated with an SFR driven by G25.18+0.26. Based on this scenario, we discuss possible acceleration processes in the SFR and compare them with the Cygnus cocoon.

Aspectos biológicos y poblacionales de Nasonovia ribisnigri y Aulacorthum solani sobre lechuga

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Vasicek Araceli

2002-01-01

Full Text Available Se estimó la influencia de los cultivares Criolla Blanca, Cuatro Estaciones y Gallega, sobre la biología y los parámetros poblacionales de Nasonovia ribisnigri y Aulacorthum solani (Homoptera: Aphidoidea a 10±1ºC y HR de 90%. Los períodos ninfal, pre-reproductivo y post-reproductivo de N. ribisnigri fueron más largos sobre Cuatro Estaciones, no así el reproductivo. En A. solani el período ninfal fue más largo sobre Criolla Blanca y Cuatro Estaciones resultando el reproductivo mayor sobre Cuatro Estaciones. Las tasas intrínsecas de crecimiento natural (r m de N. ribisnigri y A. solani fueron mayores sobre Criolla Blanca y Gallega, respectivamente. De acuerdo a la especie predominante convendría utilizar Cuatro Estaciones para N. ribisnigri y Criolla Blanca para A. solani, en épocas frías.

Contexto y pensamiento de Charles Taylor sobre el consenso

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Doris Elena Ospina Muñoz

2017-01-01

Full Text Available El artículo sostiene que el consenso no es un tema de primer orden en la filosofía política de Charles Taylor, pero una lectura orientada al problema puede ofrecer los elementos para establecer una teoría sobre dicha noción e identificar los argumentos para su justificación. Además, se enfatiza en el contexto de discusión que permite introducir la filosofía de Taylor como un modo de pensar sobre el consenso, alternativo al constructivismo.

Creencias sobre series de ficción televisiva: el caso de Velvet

OpenAIRE

Cristina Etayo Pérez

2015-01-01

Las series de televisión son un género de ficción muy atractivo tanto para los espectadores como para las cadenas que las emiten. Dados sus altos costes de producción, deben atraer al público desde el primer momento. Hay estudios sobre los factores que determinan el éxito de una película de cine pero se ha realizado escasa investigación sobre estos factores en series de televisión. En este trabajo se analizan las creencias de los espectadores sobre un conjunto de factores objetivos de la seri...

Entre negación y reconocimiento. Estudios sobre “homosexualidad” en Colombia

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José Fernando Serrano A.

1997-04-01

Full Text Available A Ebel Botero, pionero de los estudios sobre homosexualidad en Colombia¿Qué se ha escrito en Colombia sobre la “homosexualidad”? ¿Existen estudios desde las ciencias sociales y humanas sobre las personas “homosexuales” en el país? Con este par de preguntas el autor presenta un recorrido inicial por algunos textos de autores colombianos al respecto y señala la necesidad de abordar la construcción de conocimiento especializado que ahonde en la comprensión de las diversas formas en que se expresan las sexualidades.

Gels and gel-derived glasses in the Na2O-B2O3-SiO2 system. [containerless melting in space

Science.gov (United States)

Mukherjee, S. P.

1982-01-01

The containerless melting of high-purity multicomponent homogeneous gels and gel-monoliths offers a unique approach to making ultrapure multicomponent optical glasses in the reduced gravity environment of space. Procedures for preparing and characterizing gels and gel-derived glasses in the Na2O-B2O3-SiO2 system are described. Preparation is based on the polymerization reactions of alkoxysilane with trimethyl borate or boric acid and a suitable sodium compound. The chemistry of the gelling process is discussed in terms of process parameters and the gel compositions. The physicochemical nature of gels prepared by three different procedures were found to be significantly different. IR absorption spectra indicate finite differences in the molecular structures of the different gels. The melting of the gel powders and the transformation of porous gel-monoliths to transparent 'glass' without melting are described.

BENVENISTE, LACAN E O ESTRUTURALISMO: SOBRE O SENTIDO ANTITÉTICO DAS PALAVRAS PRIMITIVAS

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Bruno Focas Vieira MACHADO

2015-06-01

Full Text Available Este artigo pretende evidenciar determinados aspectos da leitura estruturalista de Benveniste sobre as fundamentações linguísticas encontradas em Freud, mais propriamente em seu texto “Sobre o sentido antitético das palavras primitivas”. Coloca-se em diálogo o artigo de Benveniste intitulado “Observações sobre a função da linguagem na descoberta freudiana” com as teorizações linguísticas apresentadas por Freud em seu texto supracitado. Busca-se, assim, uma interface entre os estudos linguísticos e psicanalíticos, problematizando a noção de língua primitiva trazida por Freud e confrontando-a com pressupostos da Linguística Estrutural defendida por Benveniste. A abordagem tecida é eminentemente teórica, buscando iluminar os pontos de divergência entre a concepção de linguagem na perspectiva de Freud e de Benveniste. Para atingir esse objetivo, buscou-se o estudo sobre a negação desenvolvida por Freud em seu texto “A negativa” e colocou-a em relação com as observações de Benveniste sobre o linguista Carl Abel, forte influência linguística no pensamento freudiano desenvolvido no texto “Sobre o sentido antitético das palavras primitivas”. Como conclusão, torna-se possível compreender que, se a língua é uma estrutura e um sistema, ela possui um caráter universal e a-histórico, o que contesta a tese freudiana sobre a existência de línguas primitivas.

NEAR-INFRARED PERIODIC AND OTHER VARIABLE FIELD STARS IN THE FIELD OF THE CYGNUS OB7 STAR-FORMING REGION

Energy Technology Data Exchange (ETDEWEB)

Wolk, Scott J.; Rice, Thomas S. [Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138 (United States); Aspin, Colin A. [Institute for Astronomy, University of Hawaii at Manoa, 640 North Aohoku Place, Hilo, HI 96720 (United States)

2013-04-15

We present a subset of the results of a three-season, 124 night, near-infrared monitoring campaign of the dark clouds Lynds 1003 and Lynds 1004 in the Cygnus OB7 star-forming region. In this paper, we focus on the field star population. Using three seasons of UKIRT J, H, and K-band observations spanning 1.5 years, we obtained high-quality photometry on 9200 stars down to J = 17 mag, with photometric uncertainty better than 0.04 mag. After excluding known disk-bearing stars we identify 149 variables-1.6% of the sample. Of these, about 60 are strictly periodic, with periods predominantly <2 days. We conclude this group is dominated by eclipsing binaries. A few stars have long period signals of between 20 and 60 days. About 25 stars have weak modulated signals, but it was not clear if these were periodic. Some of the stars in this group may be diskless young stellar objects with relatively large variability due to cool starspots. The remaining {approx}60 stars showed variations which appear to be purely stochastic.

Reflexiones sobre la anorexia Reflexões sobre a anorexia Reflections about anorexy

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Andrea Ferrero

2009-03-01

Full Text Available El propósito de este artículo es presentar algunas reflexiones sobre el trastorno anoréxico, algunas posibles explicaciones sobre el mismo, y proponer una respuesta posible desde la perspectiva psicoanalítica. Este estudio plantea el sufrimiento del sujeto como la manifestación de una relación inconsciente entre las ecuaciones afectivas y el entramado social de la persona. Se discute la particular relación que se establece entre la necesidad, la demanda y el deseo en este tipo de trastornos, y cómo el síntoma anoréxico se plantea como estrategia enferma de defensa del deseo. Se puede considerar el impacto que la presión de la cultura tiene en la manutención del síntoma anoréxico, dada la importancia del ideal de delgadez y belleza, también asociados con la obtención de mayor éxito y felicidad. Finalmente, se plantea el valor del análisis de la personalidad en relación a aspectos sociales para la consideración del trastorno anoréxico, el cual debe ser comprendido singularmente, más allá de sus manifestaciones y de la posible limitación a la estructura de la histeria.O objetivo deste artigo é apresentar algumas reflexões sobre o processo de adoecimento da anorexia e algumas possíveis explicações sobre esse processo, bem como propor uma possível resposta a partir da perspectiva psicanalítica. Este estudo estabelece o sofrimento do sujeito como a manifestação da relação inconsciente entre as equações afetivas e a trama social da pessoa. Procura-se discutir a peculiar relação entre necessidade, demanda e desejo neste tipo de transtorno, e como a anorexia é uma estratégia patológica de defesa do desejo. Pôde-se observar a influência da pressão da cultura na manutenção da anorexia, justificada pelo ideal de magreza e de beleza, que também são associadas com a possibilidade de obter maior êxito e felicidade. Por último, considera-se o valor da análise da personalidade em relação aos aspectos sociais

PROTOCOLO DE KYOTO: DEBATE SOBRE AMBIENTE Y DESARROLLO EN LAS DISCUSIONES SOBRE CAMBIO CLIMÁTICO

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Rodríguez S. Liliana

2008-07-01

Full Text Available El comportamiento climático del planeta y sus consecuencias han propiciado debates sobre los modelos de desarrollo de los países responsables del deterioro acelerado del ambiente y de los fenómenos naturales por estos días recurrentes. Sin embargo, países como Estados Unidos, luego de firmar compromisos como la Convención sobre Cambio Climático, rehúsan adquirir las obligaciones del Protocolo de Kyoto, por temor a sufrir deterioro en sus economías. En este escenario, donde la nación responsable de la emisión de aproximadamente 36% de los gases efecto invernadero resultado de la acción humana en el planeta no se compromete a adoptar políticas restrictivas tendientes a hacer sus modelos de producción más amigables con la naturaleza a pesar de que dichas medidas empiezan a ser impuestas a otras naciones como condicionantes en las negociaciones comerciales internacionales, parece ser que la adopción del Protocolo de Kyoto para países en desarrollo como Colombia no es del todo benéfica.

Efeitos dos choques fiscais sobre o mercado de trabalho brasileiro

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Diogo Baerlocher Carvalho

2013-06-01

Full Text Available Esse trabalho tem por objetivo entender quais os efeitos dos choques fiscais sobre o mercado de trabalho brasileiro. Em particular, utiliza se uma abordagem SVAR para avaliar esses efeitos sobre o emprego e o salário real. Os choques fiscais são identificados a partir da imposição de restrições de sinais puras sobre a relação dinâmica entre os gastos do governo, o produto real e a oferta de trabalho. As restrições são obtidas a partir de funções de resposta a impulso Bayesianas derivadas de um modelo DSGE na tradição da Nova Síntese Neoclássica. As funções de resposta a impulso obtidas a partir da abordagem SVAR mostram que choques fiscais aumentam o salário real e o emprego.

Contabilidad de Costos I. - Problemas sobre la contabilización de las actividades relacionadas con la mano de obra

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Morillo Moreno, Marysela C.

2008-01-01

ÍNDICE Introducción Problemas sobre terminología básica Problemas básicos sobre el Ciclo de la Contabilidad de Costos Problemas sobre contabilización de las actividades relacionadas con los materiales Problemas sobre la contabilización de las actividades relacionadas con la mano de obra Problemas sobre la contabilización de las actividades relacionadas con los costos indirectos de fabricación Problemas sobre el Ciclo de la Contabilida...

Autobiografía, identidad y memoria familiar. Apuntes sobre Conjeturas sobre la memoria de mi tribu de José Donoso

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Martín Lombardo

2015-12-01

Full Text Available A partir de los desarrollos propuestos por Philippe Lejeune sobre el pacto y el espacio autobiográfico así como la reflexión de Agamben en torno a la creación y a la figura de la excepción, el presente artículo se propone analizar el libro Conjeturas sobre la memoria de mi tribu de José Donoso. En particular, el artículo centra su análisis en la manera en que se concibe el surgimiento de la figura del escritor, en la configuración de la identidad a través de la historia familiar y en la importancia del espacio familiar y del tiempo en la obra de Donoso.

CSO BOLOCAM 1.1 mm CONTINUUM MAPPING OF THE BRAID NEBULA STAR FORMATION REGION IN CYGNUS OB7

International Nuclear Information System (INIS)

Aspin, Colin; Beck, Tracy L.; Davis, Chris J.

2011-01-01

We present a 1.1 mm map of the Braid Nebula star formation region in Cygnus OB7 taken using Bolocam on the Caltech Submillimeter Observatory. Within the 1 deg 2 covered by the map, we have detected 55 cold dust clumps all of which are new detections. A number of these clumps are coincident with IRAS point sources although the majority are not. Some of the previously studied optical/near-IR sources are detected at 1.1 mm. We estimate total dust/gas masses for the 55 clumps together with peak visual extinctions. We conclude that over the whole region, approximately 20% of the clumps are associated with IRAS sources suggesting that these are protostellar objects. The remaining 80% are classed as starless clumps. In addition, both FU Orionis (FUor) like objects in the field, the Braid Star and HH 381 IRS, are associated with strong millimeter emission. This implies that FUor eruptions can occur at very early stages of pre-main-sequence life. Finally, we determine that the cumulative clump mass function for the region is very similar to that found in both the Perseus and ρ Ophiuchus star-forming regions.

Excertos sobre o sedentarismo

OpenAIRE

Palma,Alexandre; Vilaça,Murilo Mariano; Assis,Monique Ribeiro de

2014-01-01

O sedentarismo tem sido tratado como algo perfeitamente determinável, objetivo e, portanto, que pode ser apreendido. Por outro lado, o conceito de sedentarismo ainda permanece questionável e, por conseguinte, os instrumentos mostram-se inconsistentes. Neste sentido, o objetivo do presente estudo foi mostrar que diferentes discursos de verdade vêm concorrendo por esse conceito, o que nos motiva a pensar qual é a verdade ou, até mesmo, se há alguma verdade sobre ele. Após apresentarmos diferent...

A Teoria Queer e os Estudos Organizacionais: Revisando Conceitos sobre Identidade

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Eloisio Moulin de Souza

2017-05-01

Full Text Available A teoria queer desenvolveu-se incialmente na década de noventa, nas ciências sociais e humanas, principalmente nos estudos literários e linguísticos, sendo posteriormente incorporada aos estudos organizacionais. Entretanto, apesar de sua aplicação aos estudos organizacionais, ainda existe uma lacuna acerca do debate sobre seus conceitos e significados. Por isso, este artigo objetiva aprofundar e revisar o debate sobre os aspectos desenvolvidos por essa teoria, focando-se nos conceitos relacionados à produção identitária e subjetiva. Para cumprir este intento, as ideias queer sobre identidade, sujeito, performatividade, performance e identificação são apresentadas e debatidas. Defende-se que a teoria queer é um verbo (ação ao invés de um substantivo (identidade e a aplicação de seus conceitos não se restringe somente aos estudos sobre gênero, sexualidade e minorias. Por fim, discute-se a expansão da utilização dos conceitos queer no estudo de outras formas hegemônicas de categorias identitárias presentes no mundo corporativo.

Hölderlin: sobre la religión

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Andrés Alfredo Castrillón Castrillón

2014-06-01

Full Text Available El artículo se propone dilucidar la noción de religión que tiene Friedrich Hölderlin en el ensayo “Sobre la religión”, el cual traza un pensamiento tan o más complejo de la relación hombre - dios, y hombre - comunidad, que los de filósofos como Kant o Hegel en sus reflexiones sobre Dios y la religión. Destacar por medio del análisis del ensayo cómo comprende Hölderlin la religión y cómo la vincula con la vida de los hombres en su contexto es la tarea fundamental del escrito, para concluir con las propuestas poéticas de la fundación de religiones o sus manifestaciones a través del mito.

Investigación sobre el cotidiano del sujeto: oportunidades para una ciencia aplicada

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Manuel Amezcua

2012-01-01

Full Text Available Desde un modelo de investigación emergente, la Investigación Aplicada a los Cuidados, se propone reflexionar sobre una de las áreas de indagación: la Investigación sobre el Cotidiano del Sujeto. El cotidiano del sujeto se conceptualiza como un espacio de interacción social donde las personas ejercen autonomía para tomar decisiones y ejecutar acciones para cuidar su salud. A través de diseños principalmente cualitativos, la Investigación sobre el Cotidiano del Sujeto aporta evidencias útiles y pertinentes para la práctica enfermera porque hablan del contexto y desde la perspectiva de los sujetos. Estas evidencias pueden encuadrarse en cuatro grandes dimensiones: la comprensión del padecimiento humano ante la enfermedad, la cultura del cuidado, la percepción sobre las intervenciones en salud, y el cotidiano del cuidador. Finalmente se plantean algunos desafíos que nos propone la Investigación sobre el Cotidiano del Sujeto e implican tres dimensiones imprescindibles en el ejercicio del cuidado: la dimensión ética, política y científica.

Ocena prostorske razsežnosti žledoloma februarja 2014 v bukovih in smrekovih sestojih v občinah Tolmin in Dobrova - Polhov Gradec s pomočjo tehnologije daljinskega zaznavanja

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Šafran, Aljoša

2018-01-01

V magistrskem delu obravnavamo žledolom, ki je ob koncu januarja in začetku februarja 2014 povzročil gmotno škodo ne le na vegetaciji, temveč tudi na energetski in železniški infrastrukturi. Po dosedanjih ocenah gre za enega izmed najobsežnejših žledolomov na območju Slovenije v zadnjih desetletjih. V raziskavi nas je zanimala prostorska razporeditev sprememb v biomasi bukovih in smrekovih sestojev na z žledom prizadetih območjih, zaznanih s pomočjo satelita Landsat. V raziskavo sta bili zaje...

Walter Benjamin em Gotham City: sobre a violência pura

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Andityas Soares de Moura Costa Matos

2016-12-01

Full Text Available http://dx.doi.org/10.5007/2177-7055.2016v37n74p137 O presente trabalho reflete brevemente sobre as ideias de violência pura e de estado de exceção efetivo no pensamento de Walter Benjamin (1892-1940, lançando na seção 2 a hipótese de que são resultados de uma longa meditação que começa com o texto Sobre a crítica da violência (1921, passa pelo denso fragmento O caráter destrutivo (1931 e chega à obra intitulada Teses sobre o conceito de história (1940, quando Benjamin percebe com clareza à impossibilidade de se negociar com as instituições democrático-liberais, as quais funcionam como estruturas desaceleradoras (katéchonta do tempo da revolução, leitura apresentada na seção 1 mediante a profanação do conceito original schmittiano. O artigo passa então na seção 3 a interpretar as ideias de Benjamin em um cenário de ficção – a trilogia Batman de Christopher Nolan – que a cada dia parece mais terrivelmente real, concluindo com um parágrafo de sabor agambeniano sobre o direito-que-vem (seção 4.

ENTORNOS MPLS Y ATM PARA EL TRANSPORTE DE VOZ SOBRE INTERNET

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Nancy Yaneth Gelvez García

2012-08-01

Full Text Available Este artículo presenta los resultados obtenidos en el estudio de la calidad de servicio sobre redes IP en tráficos sensibles al retardo como la VoIP sobre la tecnología ATM y MPLS. Se analizaran diferentes topologías con características propias que permitirán evaluar valores tales como el retardo y el ancho de banda.

Pesquisa documental sobre a história da hanseníase no Brasil

OpenAIRE

Santos,Vicente Saul Moreira dos

2003-01-01

Este trabalho apresenta resultados parciais de uma pesquisa sobre fontes relativas à lepra, realizada em diversas instituições da cidade do Rio de Janeiro. No Real Gabinete Português de Leitura, no Arquivo Nacional e na Biblioteca Nacional foram pesquisados livros, índices, ofícios e fotografias sobre administração de leprosários e artigos sobre o tratamento da doença. No Centro de Pesquisa e Documentação de História Contemporânea do Brasil (CPDOC-FGV) foram consultados diversos arquivos, des...

Una nota sobre formación y formalismo del contrato electrónico

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Silvana Fortich

2011-06-01

Full Text Available Este artículo pretende llamar la atención sobre algunas de las particularidades que presenta la celebración de contratos por medios electrónicos, indagando sobre las características propias de su formación y sobre la influencia del proceso general de renacimiento del formalismo en el campo del comercio electrónico. El estudio es realizado con base en las normas del derecho contemporáneo francés y colombiano que se ocupan de regular la materia.

Una nota sobre formación y formalismo del contrato electrónico

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Silvana Fortich

2011-07-01

Full Text Available Este artículo pretende llamar la atención sobre algunas de las particularidades que presenta la celebración de contratos por medios electrónicos, indagando sobre las características propias de su formación y sobre la influencia del proceso general de renacimiento del formalismo en el campo del comercio electrónico. El estudio es realizado con base en las normas del derecho contemporáneo francés y colombiano que se ocupan de regular la materia.

Teorias sobre o amor no campo da Psicologia Social

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Martins-Silva, Priscilla de Oliveira; Trindade, Zeidi Araujo; Silva Junior, Annor da

2013-01-01

Este é um ensaio teórico sobre o fenômeno amor em relacionamentos românticos no campo da Psicologia e no da Psicologia social. São apresentadas as primeiras teorias sobre o amor na Psicologia, e, posteriormente, são abordadas em maior profundidade três teorias da Psicologia social: os estilos de amor de John Alan Lee, a teoria de apego, de Phillip Shaver, Cindy Hazan e Donna Bradshaw, e a teoria triangular do amor, de Robert J. Sternberg. São apresentados os aspectos teóricos, empíricos e met...

Estudios en Solanaceae – XXIII sobre dos especies nuevas de cuatresia Estudios en Solanaceae – XXIII sobre dos especies nuevas de Cuatresia

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Hunziker Armando T.

1986-12-01

Full Text Available Two new Colombian species of Cuatre sia (Solanaceae, are clescribed and illustrated. Con motivo de la preparación de una sinopsis preliminar sobre Cuatresia A. T. Hunz., ha quedado en evidencia una serie de especies indescritas, 2 de las cuales presento seguidamente.  Es esta una buena oportunidad para llamar la atención de los colegas sobre este difícil y olvidado género de Solanáceas.  En su gran mayoría, las dificultades se originan en los materiales disponibles, que son escasos y fragmentarios; varias especies se conocen por una única colección (a veces con apenas 1 o 2 flores, en la mayoría se ignora cómo son el fruto, la semilla y el embrión, y en otros casos, las observaciones sobre el color de la corola son contradictorias, o imprecisas, o faltan por completo. Por todo ello, quisiera incitar a quienes tienen el privilegio de acceder a las regiones donde crecen estas plantas, a que extremen los recaudos para que las colecciones de Cuatresia mejoren en calidad y cantidad.

Conocimientos sobre VIH/sida en un grupo de embarazadas VIH(+)

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Guerra, ME; Rodríguez, AI; S, Rodríguez; Tovar, V; A, Carvajal; Ferreira, A; Blanco, L; León, JR

2009-01-01

OBJETIVO: Determinar el grado de conocimiento sobre VIH/SIDA en mujeres embarazadas VIH(+). MATERIALES Y MÉTODOS: El universo estuvo constituido por 58 embarazadas VIH(+) que acudieron a diferentes servicios de obstetricia de hospitales en Caracas durante los años 2003-2005. Se le aplicó una encuesta anónima individual, previo consentimiento asistido de las evaluadas. RESULTADOS: Fundamentalmente no existe un adecuado conocimiento sobre las vías de transmisión de la enfermedad, así como perce...

Validez de dos pruebas para evaluar la percepción materna del peso del hijo Validity of two tests to evaluate maternal perception of child's weight

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Yolanda Flores-Peña

2009-12-01

Full Text Available OBJETIVOS: Evaluar la percepción materna del peso del hijo por medio de dos pruebas, percepción por palabras (PP y percepción por imágenes (PI, así como evaluar la validez de las dos pruebas mediante la determinación de la sensibilidad y especificidad. MATERIAL Y MÉTODOS: Se seleccionó un total de 418 diadas madre-hijo del área urbana de Monterrey Nuevo León; a las madres se les aplicó un cuestionario de percepciones sobre la apariencia física y la salud. Se calculó sensibilidad y especificidad. El índice de masa corporal medido del hijo fue el estándar de oro. RESULTADOS: El 20.34% de madres de niños con sobrepeso (SP y 7.41% de madres de niños con obesidad (OB percibieron el sobrepeso por la prueba PP; y 62.71% de madres de niños con SP y 81.48% de niños con OB por la prueba PI. Las madres subestimaron el SP-OB; la sensibilidad y especificidad de la PP fueron de 12 y 21% y las de PI de 75 y 15%, respectivamente. CONCLUSIONES: Las madres de niños con SP-OB subestiman el peso del hijo. Las imágenes son útiles para que las madres reconozcan esta situación.OBJETIVE: To assess maternal perception of their children weight using words (PP and using images (PI and evaluate the validity of the two tests by determining their sensitivity and specificity. MATERIAL AND METHODS: A total of 418 mother-child diads were selected from urban areas in the Monterrey, Nuevo León area. A questionnaire was administered to the mothers about perceptions regarding physical appearance and health. Sensitivity and specificity were calculated and the body mass index measurement of the child was the gold standard. RESULTS: Mothers underestimated overweight (SP and obesity (OB, with 20.34% of mothers of children with SP and 7.41% of children with OB perceiving their child's condition with the PP test, and 62.71% of mothers of children with SP and 81.48% of those of children with OB perceiving it with the PI test. The tests had 12% sensitivity and 21

Crítica y reformismo dieciochescos. Algunos textos sobre Filipinas

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García de los Arcos, María Fernanda

1996-12-01

Full Text Available Not available.

Al igual que en España y América, en las Filipinas de la segunda mitad del siglo XVIII se produjeron escritos en los que se analizaba la realidad del archipiélago, las causas de sus problemas y las posibles soluciones para superarlos. Algunos de estos textos permanecen inéditos. Así ocurre con los tres que se estudian en este artículo, en el que se hace una valoración comparativa sobre sus posibilidades como fuentes para apreciar la situación general de las Islas en ese período y las ideas que tenía la élite dirigente sobre ella, especialmente en tres aspectos: la personalidad colectiva de los nativos; las formas de explotación colonial y sus repercusiones sobre la mayoría de la población y las causas que originaban lo que entonces llamaban “el atraso” de aquellos territorios.

Teorias utilizadas nas investigações sobre gestão do conhecimento

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Luiza A. O. P. Xavier

2012-12-01

Full Text Available A gestão do conhecimento tem sido reconhecida por pesquisadores e usuários como crucial para o crescimento e desenvolvimento das organizações. A área de Sistemas de Informação contribui com investigações sobre gestão do conhecimento. Este artigo tem como objetivo identificar as principais teorias que foram utilizadas nas investigações sobre a gestão do conhecimento, considerando as teorias relacionadas com a área de sistemas de informação. As teorias identificadas em cerca de 40% dos artigos analisados são: Game Theory, Social Capital Theory, Theory of Planned Behavior, Social Exchange Theory, Dynamic Capabilities e Theory of Reasoned Action. Observou-se que as teorias são utilizadas tanto em investigações sobre gestão do conhecimento, como em pesquisas sobre uma das etapas do seu processo, ou seja, o compartilhamento do conhecimento. Destaca-se também que determinado aspecto da gestão do conhecimento, por exemplo, antecedente do compartilhamento de conhecimento, pode ser investigado utilizando diferentes teorias.

Algunos relatos sobre santería, magia y etnomedicina en Cuba

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Carrascosa Palomera, Cruz

2008-01-01

Este artículo presenta una colección de relatos sobre santería, magia y etnomedicina en Cuba. Incluye información sobre ritos y prácticas de iniciación, de purificación, de curación. This paper offers a selection of stories about santería, magic and folk medicine in Cuba. Includes reports on iniciation, purification and curation rites and practices

Incidencia de los fertilizantes sobre el pH del suelo

OpenAIRE

Ginés, Irantzu; Mariscal Sancho, Ignacio de Loyola

2002-01-01

El pH del suelo o del sustrato de cultivo determina la asimilabilidad de los nutrientes; los fertilizantes tienen una importante influencia sobre dicho pH. La incidencia de los fertilizantes sobre el pH del suelo depende principalmente de: a) el perfil acidificante de la composición química del fertilizante utilizado b) de su carácter descalcificante o calcificante y c) de la capacidad tamponadora del suelo. En esta monografía se recogen la incidencia de los principales fertilizantes comercia...

EXTRATO DE CHÁ VERDE (Camellia sinensis PROMOVE AÇÃO ANTIMICROBIANA SOBRE Staphylococcus aureus

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Leandro Wagner Figueira

2017-01-01

Full Text Available É de grande importância ampliar as pesquisas científicas com plantas medicinais sobre micro-organismos. Foi verificado o efeito antimicrobiano do extrato de C. sinensis , sobre cultura planctônica e biofilme de S. aureus. Neste estudo foi verificada ação do extrato entre 50 a 0,09 mg/mL sobre cultura planctônica, para determinação da CIM e CBM. A ação do extrato sobre biofilme foi analisada pela exposição de 5 min ao produto vegetal a 200mg/mL. Foi utilizado o método de MTT para determinar a redução da viabilidade do biofilme. Nos grupos controles foram utilizadas clorexidina (+ e solução salina (-, sendo n = 12/grupo. A redução do biofilme foi analisada por ANOVA e Tukey Test (p ≤ 0,05. Em cultura planctônica as concentrações avaliadas não foram efetivas, contudo, utilizando-se a concentração de 200 mg/mL sobre o biofilme, foi verificada redução significativa. Com isso, concluiu-se que o extrato de chá verde demonstrou ação sobre biofilme de S. aureus provendo redução significativa em sua viabilidade.

Estrategia educativa sobre sexualidad sana en adolescentes

Directory of Open Access Journals (Sweden)

Carmen Olivera Carmenates

Full Text Available Se realizó un estudio de intervención con el objetivo de elaborar una estrategia educativa para incrementar conocimientos sobre sexualidad sana en un grupo de adolescentes de la escuela Secundaria Básica Alfredo Gómez del Municipio Camagüey entre octubre de 2012 y febrero de 2013. La muestra fue de 37 estudiantes. Se aplicó una encuesta que se convirtió en el registro primario de datos, confeccionada según criterios de expertos y la bibliografía. Una vez analizados los resultados se procedió a diseñar la estrategia educativa y posteriormente a su evaluación. Los datos se procesaron de forma automatizada. Antes de aplicar la estrategia educativa se comprobó que los adolescentes no tenían un adecuado conocimiento sobre la sexualidad sana. Los resultados demuestran la importancia de los estudios de intervención.

Insuficiencia normativa sobre roles y funciones para los miembros de la Fuerza Pública

OpenAIRE

Morales Hernández, Martha Lizett; Ruiz, Jesus A.

2016-01-01

Atendiendo al interés de conocer la manera en que se han manejado en Colombia las políticas sobre Seguridad y Defensa Nacional, respecto de la seguridad jurídica de los miembros de la Fuerza Pública, el presente artículo bajo el método bibliográfico e histórico, plantea en su primera parte, la manera en que los gobiernos elegidos a partir de la Constitución de 1991, concibieron la Seguridad y la Defensa, así como sus políticas sobre este particular; posteriormente, se estudian las normas sobr...

SANTO AGOSTINHO, UM CRISTÃO FILÓSOFO: SEU PENSAMENTO SOBRE DEUS E O HOMEM

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Pe. Antonio Marcos Chagas

2012-06-01

Full Text Available Agostinho desenvolve uma reflexão organizada e uma síntese filosófico-religiosa de extraordinária força e beleza que influenciara significativamente todo o pensamento filosófico e teológico posterior. O presente trabalho abordará uma reflexão sobre o pensamento agostiniano sobre Deus, sobre o homem, o mal e uma reflexão sobre a história à luz da fé. A leitura feita por Agostinho destes temas desdobra uma abordagem focada na primazia da graça que permeia a vida humana e oferece possibilidades para sua plena realização enquanto liberdade consciente. O presente trabalho encontra nos originais agostinianos e nas publicações dos escritores especializados sua fonte de pesquisa.

Estudio sobre el software libre orientado a personas con discapacidad visual

OpenAIRE

Palomá Parra, Esaú

2015-01-01

Se pretende realizar un estudio sobre las herramientas TIC accesibles a las personas con discapacidad visual, que permita sugerir el diseño de un sistema universal accesible orientado a personas con discapacidad visual. Es pretén realitzar un estudi sobre les eines TIC accessibles a les persones amb discapacitat visual, que permeti suggerir el disseny d'un sistema universal accessible orientat a persones amb discapacitat visual. Master thesis for the Free Software program.

ALDEIAS URBANAS OU CIDADES INDÍGENAS? REFLEXÕES SOBRE ÍNDIOS E CIDADES

Directory of Open Access Journals (Sweden)

Eduardo Soares Nunes

2010-06-01

Full Text Available Se a presença indígena nas cidades brasileiras – um fenômeno antigo –, não passou despercebida aos olhos dos(as antropólogos(as, é apenas em anos recentes que começam a aparecer os primeiros trabalhos sobre a questão. Este artigo tem como objeto esse “silêncio antropológico”, num duplo sentido: a primeira parte do texto é uma digressão sobre os ditos “índios urbanos” no indigenismo no Brasil – idéias que, perpassando, em algum grau, a antropologia, influenciaram a falta de produção sobre a questão; a segunda (e principal é uma tentativa de pensar a presença indígena nas cidades de uma perspectiva mais familiar ao pensamento ameríndio. Este artigo é uma proposta de abordagem analítica sobre o tema.

"Y el resto se hace con gritos": Notas sobre literatura y teatro

Directory of Open Access Journals (Sweden)

Marcela Arpes

2009-07-01

Full Text Available Quisiera comenzar con un, más o menos extenso, listado de obras de teatro que aún permanecen en cartel o, en todo caso, algunas de ellas lo estuvieron hasta marzo, en salas oficiales y alternativas del circuito teatral porteño pero, también, del interior del país: Tres para el té sobre textos de Lewis Carroll; Galileo, sobre la mesa sobre el texto de Bertolt Brecht; Federico tuvo un sueño, inspirada en el cuento de Antonio Tabucchi y en textos poéticos de Federico García Lorca; Los siete locos, de Roberto Arlt; Crave de Sarah Kane; Cielo rojo, el sueño Bolchevique del poeta Vladimir Maiacovsky; La Manchada, sobre Cuentos de la selva de Horacio Quiroga; Doña Flor y sus dos maridos de Jorge Amado; Grande y Pequeño del escritor alemán contemporáneo Botho Strauss; El diario de Anna Frank; Esa que no eres sobre textos de Alejandra Pizarnik, obra que recibió este verano el premio Estrella de Mar en la categoría mejor espectáculo del teatro off; La revolución silenciada sobre la obra Tres jueces para un largo silencio de Andrés Lizarraga, aquel escritor y dramaturgo argentino, el primero en recibir el premio Casas de las Américas; El mundo ha vivido equivocado de Roberto Fontanarrosa; Una vida más cuerda mañana, sobre textos de Griselda Gambaro, Sarah Kane y Vicente Zito Lema; La Divina Comedia de Dante Alighieri: Mi madre Mi Tierra donde conviven textos literarios de autores como Gloria Fuertes y Federico García Lorca; Sabor a Freud de José Pablo Feinman; El Corazón Delator de Edgar Allan Poe; El Relato de Lady Sotheby. de Marlene Spindler, espectáculo basado en textos de Fiodor Dostoyevsky y Stefan Zweig; Juicio al tango, sobre textos de Leopoldo Marechal; El día que Nietzsche lloró, título de la primera novela del profesor de psiquiatría de la Universidad de Stanford, Irvin Yalom; El último encuentro de Sándor Márai, versión escénica de la exitosa novela “El último encuentro” de Sándor Márai aquel escritor

"Y el resto se hace con gritos": Notas sobre literatura y teatro

Directory of Open Access Journals (Sweden)

Marcela Arpes

2009-06-01

Full Text Available Quisiera comenzar con un, más o menos extenso, listado de obras de teatro que aún permanecen en cartel o, en todo caso, algunas de ellas lo estuvieron hasta marzo, en salas oficiales y alternativas del circuito teatral porteño pero, también, del interior del país: Tres para el té sobre textos de Lewis Carroll; Galileo, sobre la mesa sobre el texto de Bertolt Brecht; Federico tuvo un sueño, inspirada en el cuento de Antonio Tabucchi y en textos poéticos de Federico García Lorca; Los siete locos, de Roberto Arlt; Crave de Sarah Kane; Cielo rojo, el sueño Bolchevique del poeta Vladimir Maiacovsky; La Manchada, sobre Cuentos de la selva de Horacio Quiroga; Doña Flor y sus dos maridos de Jorge Amado; Grande y Pequeño del escritor alemán contemporáneo Botho Strauss; El diario de Anna Frank; Esa que no eres sobre textos de Alejandra Pizarnik, obra que recibió este verano el premio Estrella de Mar en la categoría mejor espectáculo del teatro off; La revolución silenciada sobre la obra Tres jueces para un largo silencio de Andrés Lizarraga, aquel escritor y dramaturgo argentino, el primero en recibir el premio Casas de las Américas; El mundo ha vivido equivocado de Roberto Fontanarrosa; Una vida más cuerda mañana, sobre textos de Griselda Gambaro, Sarah Kane y Vicente Zito Lema; La Divina Comedia de Dante Alighieri: Mi madre Mi Tierra donde conviven textos literarios de autores como Gloria Fuertes y Federico García Lorca; Sabor a Freud de José Pablo Feinman; El Corazón Delator de Edgar Allan Poe; El Relato de Lady Sotheby. de Marlene Spindler, espectáculo basado en textos de Fiodor Dostoyevsky y Stefan Zweig; Juicio al tango, sobre textos de Leopoldo Marechal; El día que Nietzsche lloró, título de la primera novela del profesor de psiquiatría de la Universidad de Stanford, Irvin Yalom; El último encuentro de Sándor Márai, versión escénica de la exitosa novela “El último encuentro” de Sándor Márai aquel escritor

Sobre o feminino e a cidadania em Pompéia

OpenAIRE

Feitosa, Lourdes M. G. C.; Faversani, Fábio

2002-01-01

Nos últimos anos, novos trabalhos tem questionado os antigos paradigmas interpretativos que excluíam a mulher do espaço público e do grupo de cidadãos. O objetivo deste artigo é refletir sobre a ideia equivocada do confinamento feminino ao lar e de sua exclusão da vida pública e do poder, durante o século 1 d.C. A análise de inscrições parietais de Pompéia tem sido importante para questionar esta imagem sobre as mulheres romanas. _______________________________________________________________...

La literatura comparada sobre reformas administrativas: Desarrollos, limitaciones y posibilidades

OpenAIRE

Dussauge Laguna, Mauricio I.

2009-01-01

Durante las últimas dos décadas, la literatura comparada sobre reformas administrativas ha crecido significativamente. ¿Cuáles han sido sus aportaciones y cuáles sus limitaciones? ¿Qué nos queda por aprender sobre el tema? Este ensayo repasa los debates centrales de la literatura, analiza sus principales debilidades y sugiere un conjunto de futuras líneas de investigación. El argumento central del ensayo es que la literatura comparada en esta materia ha avanzado en forma considerable en térmi...

Santa sexualidad: concepciones de dos monjas sobre Feminidad y sexualidad

OpenAIRE

Giraldo Quijano, Isabel Cristina

2009-01-01

En el contexto de la religión católica, la feminidad y la sexualidad femenina se configuran según dogmas y representaciones sociales específicos, en los que la imagen de Cristo -y todo lo que ello implica- actúa como elemento fundamental en la construcción de las concepciones de las mujeres consagradas a la vida religiosa sobre sex ualidad, erotismo, cuerpo. amor. Este artículo pretende explorar desde un punto de vista sociológico las concepciones de dos monjas sobre los temas mencionados....

FALANDO SOBRE SEXUALIDADE NA ADOLESCÊNCIA: RELATO DE EXPERIÊNCIA

OpenAIRE

Rabin, Eliane Goldberg; UFCSPA; Waterkemper, Roberta; UFCSPA; Caregnato, Rita C. A.; UFCSPA; Souza, Emiliane Nogueira de; UFCSPA

2014-01-01

Trata-se de um relato de experiência sobre atividade de extensão realizada por docentes e acadêmicos do Curso de Graduação em Enfermagem sobre sexualidade na adolescência. Atividade realizada com jovens de 10 a 19 anos, estudantes do ensino fundamental e médio de escolas públicas de Porto Alegre. Foram utilizadas diferentes estratégias e dinâmicas para o desenvolvimento das atividades, com vistas à maior participação dos jovens escolares. Os temas abordados foram as mudanças corporais, por me...

Rutas de glicosilación en Candida albicans: circuitos reguladores y efectos sobre virulencia

OpenAIRE

Domínguez Cantero, María del Pilar

2011-01-01

[ES]Esta tesis trata sobre las rutas de glicosilación en Candida albicans: circuitos reguladores y efectos sobre virulencia. [EN]This thesis is about glycosylation pathways in Candida albicans: regulatory circuits and effects on virulence.

El periodismo de moda en la blogosfera

OpenAIRE

González Fernández, Patricia

2016-01-01

En este trabajo de fin de grado se presenta un blog sobre periodismo de moda bajo el título: “El otro lado de la moda”. En él, se trata de mostrar una perspectiva diferente a la que ofrecen los medios de comunicación especializados en moda (tanto tradicionales como online) e incluso los diarios de estilismo o egoblogs que se encuentran en la web. Para llevar a cabo este proyecto se ha creado una plantilla en la plataforma Wordpress que poco a poco se ha ido dando forma hasta ob...

Labelling IDS clusters by means of the silhouette index

OpenAIRE

Petrovic, Slovodan; Álvarez, Gonzalo; Orfila, Agustín; Carbó, Javier

2006-01-01

Proceeding of: IX Reunión Española sobre Criptología y Seguridad de la Información. Barcelona, 2006 One of the most difficult problems in the design of an anomaly based intrusion detection system (IDS) that uses clustering is that of labelling the ob- tained clusters, i.e. determining which of them correspond to ”good” behaviour on the network/host and which to ”bad” behaviour. In this paper, a new clusters’ labelling strategy, which makes use of the Silhouette clustering quality index is ...

Modelo computacional del circuito motor basado en estudios de Resonancia Magnética Nuclear funcional

OpenAIRE

Karla Batista García-Ramó; Rafael Rodríguez-Rojas; Maylén Carballo-Barreda

2012-01-01

Los ganglios basales constituyen una compleja red de núcleos subcorticales implicados en el control motor,en la integración sensorimotora y en los procesos cognitivos. Su funcionamiento e interacción con el resto de las estructurascerebrales permanecen como una gran polémica. Este trabajo tuvo como objetivo modelar la interacción del circuito formado por los ganglios basales, el tálamo y la corteza para la selección de un programa motor, sobre la base del patrón de conectividad funcional ob...

FITspec: A New Algorithm for the Automated Fit of Synthetic Stellar Spectra for OB Stars

Science.gov (United States)

Fierro-Santillán, Celia R.; Zsargó, Janos; Klapp, Jaime; Díaz-Azuara, Santiago A.; Arrieta, Anabel; Arias, Lorena; Sigalotti, Leonardo Di G.

2018-06-01

In this paper we describe the FITspec code, a data mining tool for the automatic fitting of synthetic stellar spectra. The program uses a database of 27,000 CMFGEN models of stellar atmospheres arranged in a six-dimensional (6D) space, where each dimension corresponds to one model parameter. From these models a library of 2,835,000 synthetic spectra were generated covering the ultraviolet, optical, and infrared regions of the electromagnetic spectrum. Using FITspec we adjust the effective temperature and the surface gravity. From the 6D array we also get the luminosity, the metallicity, and three parameters for the stellar wind: the terminal velocity ({v}∞ ), the β exponent of the velocity law, and the clumping filling factor (F cl). Finally, the projected rotational velocity (v\\cdot \\sin i) can be obtained from the library of stellar spectra. Validation of the algorithm was performed by analyzing the spectra of a sample of eight O-type stars taken from the IACOB spectroscopic survey of Northern Galactic OB stars. The spectral lines used for the adjustment of the analyzed stars are reproduced with good accuracy. In particular, the effective temperatures calculated with the FITspec are in good agreement with those derived from spectral type and other calibrations for the same stars. The stellar luminosities and projected rotational velocities are also in good agreement with previous quantitative spectroscopic analyses in the literature. An important advantage of FITspec over traditional codes is that the time required for spectral analyses is reduced from months to a few hours.

Algunas reflexiones sobre el tabaquismo como factor de riesgo para diferentes enfermedades

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Miriam Bolet Astoviza

2003-08-01

Full Text Available Se realizó una revisión sobre el tabaquismo como factor de riesgo para muchas enfermedades, entre ellas, las cardiovasculares, con el objetivo de profundizar sobre los efectos perjudiciales de esta drogadicción, y para que todos los médicos se actualicen sobre el tema. Trata la magnitud del problema, enfermedades que provoca, fumadores activos y pasivos, prevención y recomendaciones.A literature review on smoking as a risk factor in many diseases, particularly, the cardiovascular diseases was made to delve into the harmful effects of this drug addiction and to update the knowledge of all the physicians on this topic. This paper deals with the size of the problem, the diseases caused, active and passive smokers, prevention and recommendations.

Reflexiones sobre el concepto de justicia

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Víctor C. Pascual Planchuelo

2005-06-01

Full Text Available Este ensayo constituye una reflexión sobre el concepto de Justicia. No se centra, como tantos estudios al respecto, en el plano teórico y metafísico, sino que atiende problemas de mayor actualidad: la opinión de los ciudadanos, la postura de los profesionales y otros asuntos controvertidos del ámbito del Derecho.

Nuevas reflexiones sobre la Posgerontología

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Ricardo Iacub

2014-03-01

Full Text Available La Posgerontología plantea una lectura epistemológica, crítica y política sobre los relatos con los que se construye el envejecimiento y la vejez desde la gerontología. En este artículo se analizará crítica y políticamente a la gerontología, tanto como un objeto cultural exótico - por su pretensión omnicomprensiva -, como por ser un campo de conocimientos cuyos presupuestos explícitos e implícitos inciden sobre su objeto de estudio. Estos factores ponen en consideración los ajustes que debe realizar todo campo de conocimiento frente a los cambios que le imprime el contexto. Así como también expresan la necesidad de dar cuenta de los efectos de la realidad que construyen en las diversas formas de saber y en las prácticas sociales.

The phenomenon of phase separated in Na2O-B2O3-SiO2, Na2O-SiO2-P2O5 glasses

International Nuclear Information System (INIS)

Procyk, B.; Bieniarz, P.; Plichta, E.; Pudelek, B.; Kucinski, G.; Staniewicz-Brudnik, B.

1997-01-01

During the thermal treatment, the phenomenon of phase separation has been observed in the some glasses. The glass has became opaque, due to the opalescence of phase separated. Investigations of the phenomenon of phase separation were conducted using the basic systems: Na 2 O-B 2 O 3 -SiO 2 , Na 2 O-SiO 2 -P 2 O 5 and theirs modifications. The occurrence of binodal and spinodal phase decomposition was observed by TEM. The phase separation inhomogeneities have drop-like character and with higher concentration shows a tendency for coalescence. The influence of the chemical composition, temperature and time on the phenomenon of phase separation in the investigated glasses has been defined. (author)

Conhecimento de mulheres de 40 a 60 anos sobre o Papillomavirus Humano

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Caroline Freitas Silveira

2011-01-01

Full Text Available El estudio planteó determinar el conocimiento de mujeres, de 40 - 60 años, sobre el Virus Papiloma Humano (VPH. Se trata de una investigación descriptiva, transversal y cuantitativa efectuada con 30 mujeres que esperaban la realización de la prueba de Papanícclacu, en el Centro de Atención Integral a la Salud de la Mujer, en Uberaba - MG, entre octubre de 2009 a enero de 2010. La edad promedio fue de 48,7 años. Sobre la prueba de Papanicolacu, un 96,7% informó que realizó el procedimiento alguna vez y 40% mencionó que la prueba previene el cáncer de cuello uterino. Sobre el VPH,86,7% de las mujeres conocía la sigla, pero 53,3% no sabía lo qué era VPH. Se concluyó que el conocimiento que estas mujeres tenían sobre la prueba Papanícclacu y la sigla VPH era insuficiente. Por lo tanto, se recomienda reforzar las campañas de información para ese rango de edad específico.

Creencias sobre series de ficción televisiva: el caso de Velvet

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Cristina Etayo Pérez

2015-05-01

Full Text Available Las series de televisión son un género de ficción muy atractivo tanto para los espectadores como para las cadenas que las emiten. Dados sus altos costes de producción, deben atraer al público desde el primer momento. Hay estudios sobre los factores que determinan el éxito de una película de cine pero se ha realizado escasa investigación sobre estos factores en series de televisión. En este trabajo se analizan las creencias de los espectadores sobre un conjunto de factores objetivos de la serie de televisión Velvet, emitida por Antena 3. Dado que estas creencias determinarán la posterior actitud hacia la serie, se profundiza en una serie de factores (sociodemográficas y de preferencias o gustos personales para determinar si las diferencias en la valoración de la serie se ven influidas por estas variables (sexo, edad, consumo de televisión y preferencia por géneros. Los resultados indican que existen diferencias en las creencias que los espectadores tienen sobre Velvet que están influidas por los factores propuestos.

Two Twin Judgements of Cienfuegos Dos juicios gemelos sobre Cienfuegos

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René ANDIOC

2011-01-01

Full Text Available Manuel eduardo de Gorostiza, in London after the constitutional triennium, signed four articles about Spanish theatre in The New Monthly Magazine using just the letter «G». At the end of that same year, 1824, an author signing with an «M», in all likelihood Prosper Mérimée, published a set of articles in Le Globe in Paris regarding the same topic. these were literal translations of those written by Gorostiza about cienfuegos, but his authorship is not mentioned.Manuel eduardo de Gorostiza, en Londres después del trienio constitucional, firmó «G» cuatro artículos sobre teatro español moderno en The New Monthly Magazine. Al final del mismo año de 1824, un tal «M», con toda probabilidad el joven Próspero Mérimée, publicó en el periódico Le Globe, de París, otros tantos sobre el propio tema, traduciendo literalmente en particular, sin mención de fuente, lo escrito por Gorostiza sobre cienfuegos.

Efectos del entrenamiento con vibraciones mecánicas sobre la ‘performance’ neuromuscular

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Marzo Edir Da Silva

2006-03-01

Full Text Available Hace ya varias décadas que se estudian los efectos de las vibraciones sobre el organismo humano. En un principio se evaluaban estos efectos con respecto a patologías producidas por la exposición prolongada de tipo ocupacional. Sin embargo, se empezaron a hacer estudios sobre el posible beneficio de la aplicación de la vibración en deportistas y a la luz de los primeros hallazgos se concluyó que se producía una mejora en la flexibilidad. Fue el ruso Nazarov quien realizó esos primeros estudios con atletas, aplicando una vibración local. Poco a poco fueron surgiendo diversos estudios sobre la vibración local o aplicada a todo el cuerpo (WBV pero en otras variables como son la fuerza, la potencia y la capacidad de salto. A pesar de que no hay un consenso en la aplicación de protocolos de entrenamiento y los resultados que se obtienen, el entrenamiento con WBV está en auge porque parece ofrecer unos resultados benéficos de manera más rápida que el entrenamiento convencional. El propósito del presente artículo es realizar una revisión bibliográfica sobre la evolución del entrenamiento de WBV con sus aplicaciones y efectos sobre la performance muscular.

Sobre consumo privado e incertidumbre. Un análisis con datos regionales españoles

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J. Aníbal Núñez Carrasco

2013-01-01

Full Text Available El presente trabajo indaga sobre el efecto de la incertidumbre en las decisiones de consumo de las familias. A partir de datos regionales españoles y teniendo como referencia teórica los modelos de ahorro preventivo, pretendemos contrastar si la incertidumbre macroeconómica afecta a las decisiones de consumo de los hogares. Para analizar esa relación utilizamos la volatilidad condicional predicha a partir de modelos ARMA-GARCH estimados sobre datos regionales. Los resultados indican que esta medida de incertidumbre ejerce un efecto destacado sobre el consumo familiar, sobre todo cuando aquélla es introducida en forma de retardo distribuido. Como paso adicional, se intentan encontrar patrones regionales de comportamiento que ayuden a explicar ese resultado.

Sobre Geoestatística e mapas

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Paulo Milton Barbosa Landim

2015-06-01

Full Text Available A Geologia, até há bem pouco tempo, era freqüentemente considerada uma ciência baseada em interpretações puramente qualitativas dos fenômenos geológicos. Nos últimos 40 anos, porém, tem sido notável a mudança da fase descritiva para a utilização de métodos quantitativos, principalmente na área da Geologia Aplicada. Entre tantos temas relacionados com a quantificação em Geologia o assunto abordado neste artigo, que pretende ser de cunho didático, diz respeito à aplicação da Geoestatística na confecção de mapas geológicos. Na primeira parte do trabalho é feita uma introdução sobre os aspectos quantitativos na interpretação dos fenômenos geológicos, em seguida conceitos básicos sobre a metodologia geoestatística e, na última parte, uma aplicação clássica da geoestatística linear, baseada nos conceitos de estacionaridade da covariância e do variograma, para a confecção de mapas.

Nuevos discursos sobre las ciudades, los municipios y las mujeres

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Ana María Goetschel

2009-01-01

Full Text Available Escritora y activista feminista. Estudió Literatura y Periodismo en la Pontificia Universidad Católica del Perú y se gradúo de Magíster en Política Social por la Universidad Nacional Mayor de San Marcos. Por espacio de más de dos décadas se desempeña como profesora en el Diploma de Estudios de Género de la Pontificia Universidad Católica del Perú y como consultora de proyectos de desarrollo en las áreas de planificación, evaluación institucional y enfoque de género para diversas agencias internacionales de cooperación en Perú y otros países de América Latina. Es Investigadora asociada y miembro del Consejo Directivo del Centro Peruano de Estudios Sociales (CEPES. Maruja Barrig acredita un vasto trabajo de investigación sobre empleo femenino, desarrollo local y organizaciones de mujeres. En una reciente conferencia “Nuevos discursos sobre las ciudades, los municipios y las mujeres” , esta investigadora peruana hizo un balance sobre las formas en que el género ha sido incorporado en las prácticas de desarrollo y las consecuencias que conlleva este tipo de intervención para el avance de la agenda del feminismo crítico. Sobre este y otros temas relacionados con su trayectoria intelectual y la acción del movimiento de mujeres en el contexto político actual de las sociedades latinoamericanas, dialogamos con Maruja Barrig.

Stuart Hall sobre raza y racismo: estudios culturales y la práctica del contextualismo

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Lawrence Grossberg

2006-01-01

Full Text Available El trabajo de Stuart Hall sobre la raza no puede separarse de su trabajo sobre los estudios culturales, y en particular, de su compromiso con un contextualismo radical. En este artículo, argumento que la obra de Stuart Hall sobre raza y racismo en el contexto de su compromiso de larga data con una práctica radicalmente contextualista y con la noción de la especificidad histórica en particular.

Polinomios perfectos sobre F2

OpenAIRE

Cely Rojas, Valeria

2010-01-01

Este trabajo muestra el status de los números perfectos y el análogo de los números perfectos en los anillos de polinomios. Además, se presentan las demostraciones de algunas propiedades de los polinomios perfectos sobre F2 de forma comprensible, basadas en el trabajo realizado por los profesores Luis Gallardo y Oliver Rahavandrainy. / Abstract. This work shows the status artis of perfect numbers and their analogue in the rings of polynomials. Proofs of some properties of perfect polynomials ...

Observaciones sobre colostomía

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Jaime Escobar T.

1971-01-01

Full Text Available Se hace una revisión sobre 133 casos de colostomías hechas en pacientes del Hospital San Juan de Dios de Bogotá en un período de cinco años; el 43.7 por ciento de los casos eran heridas por arma de fuego. La mortalidad global fue de 16.5 por ciento. La colostomía derivativa, en ASA, ha bajado la mortalidad en las heridas de colon en dicho hospital.

Algunas consideraciones sobre la estrategia de mercadotecnia en los negocios internacionales

OpenAIRE

Ernesto Raúl González Ramírez

2016-01-01

El presente artículo aborda algunas consideraciones sobre la estrategia de mercadotecnia en el contexto de los negocios internacionales. La primera parte está dirigida a describir las particularidades de las estrategias específicas de mercadotecnia (producto, precio, comunicación y distribución) en el área internacional. La segunda parte, trata sobre la importancia de tener presente el nivel de orientación al mercado o aplicación del concepto de mercadotecnia en este contexto.

Evaluación de sistemas operativos de tiempo real sobre microcontroladores

OpenAIRE

Medina, Santiago; Pi Puig, Martín; Paniego, Juan Manuel; Dell'Oso, Matías; Romero, Fernando; De Giusti, Armando Eduardo; Tinetti, Fernando Gustavo

2015-01-01

En el presente trabajo se presentan mediciones sobre diferentes sistemas operativos que soportan las características de tiempo real, instalados sobre un sistema de microcontrolador. Dichas evaluaciones caracterizan los posibles tiempos de respuesta, es decir, un límite que determina el tipo de aplicación en la cual pueden ser utilizados, dentro del marco del desarrollo de aplicaciones de Sistemas Embebidos de Tiempo Real. Una de las principales métricas es el tiempo de latencia, el cual repre...

Soportes apoyados sobre vigas pretensadas (EE. UU.

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Editorial, Equipo

1965-12-01

Full Text Available This work has been awarded a prize by the Prestreesed Concrete Institute. It refers to a number of flyovers on the Arroyo Seco, of California. This river has been canalized, to help drainage in case of heavy rainfall. The canal runs through a highly populated zone, and a motor road and accessory ramps had to cross the canal. The resulting design involves three prestressed girders, lightly arched in a parabolic outline, resting on each river shore, running along the line of the bridge, over the canal. It was decided that the bridge piles should not rest on the river bed, in order not to reduce its flow capacity. The girders of a maximum length of 39 ms, are box shaped, and stiffened with thin diaphragms. The cylindrical pile, 1.50 m in diameter, is an integral part of the girder, and applies to it a concentrated load of about 4000 tons. The girders rest on reinforced concrete cubes, which in turn are supported by concrete slabs and piles driven into the soil.Esta obra ha sido premiada por el Prestressed Concrete Institute y se refiere a una serie de pasos superiores sobre el Arroyo Seco, en California, que se ha canalizado para servir de desagüe en el caso de avenidas torrenciales. El canal se halla en una zona de edificación densa y se trata del paso—sobre aquél—de una autopista y rampas de acceso. La solución adoptada consistió en tres vigas pretensadas, ligeramente arqueadas con perfil parabólico, apoyadas en las dos márgenes y situadas en correspondencia con los tres soportes, sobre el propio canal, ya que ninguno de aquéllos debía apoyarse en el lecho de este último al objeto de no disminuir su capacidad de desagüe. Las vigas—de unos 39 m de longitud la mayor—son del tipo cajón, rigidizadas con unos diafragmas de pequeño espesor. El soporte cilíndrico, de 1,50 m de diámetro, se solidariza con la viga y le transmite una notable carga concentrada, del orden de 4.000 toneladas. Los apoyos de estas vigas son simples dados

ADSORCIÓN DE ALDEHÍDOS INSATURADOS SOBRE TiO2

OpenAIRE

Natalia Ortega; Oswaldo Núñez

2012-01-01

En el presente trabajo se estudió la adsorción de aldehídos insaturados sobre la superficie del TiO2. Para evaluar su eficiencia como catalizador, se realizaron experimentos de fotocatálisis heterogénea de p-nitrofenol (PNF) y una muestra proveniente de efluentes industriales. Se empleó un simulador solar y cuatro sistemas de TiO2: el TiO2-sólo (sin modificar) y los sistemas TiO2-dienal constituidos por la adsorción química de 2,4 hexadienal, 2,4 heptadienal y el trans-cinamaldehído sobre la ...

(I) Informe sobre conflicto violento en colombia (2011–2012)

OpenAIRE

2014-01-01

Las negociaciones de paz entre el gobierno nacional y las FARC avanzan de modo considerable. Al momento del cierre del presente informe –julio de 2014–, se construyó un acuerdo sobre los tres primeros puntos de la agenda –la reforma agraria, la participación política y las drogas ilícitas–. Sin duda la negociación progresa, los puntos sobre los que se trazó un acuerdo tocan dimensiones neurálgicas de la vida colectiva: el agro y su atraso histórico, la democracia y sus cierres, el narcotráfic...

EL IMPUESTO SOBRE BEBIDAS AZUCARADAS EN ESPAÑA

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Vicente Ortún

2016-01-01

Full Text Available Este artículo aporta una revisión crítica acerca de los retos a los que se enfrentan los impuestos sobre las bebidas azucaradas como instrumento de políticas de salud, para revertir la tendencia epidémica de la obesidad. Se valoran las experiencias de los países más significados, en particular México, y se reflexiona sobre el contrapeso que ejerce la industria a las políticas antiobesidad y el poder de los lobbies. Esas políticas impositivas en pro de la salud pública han de sobreponerse a la enorme fuerza de la industria, que es ejercida en varios niveles –ciencia e investigación, reputación de marca, influencia en reguladores–. Se sugiere que un impuesto específico sobre bebidas azucaradas tiene bastante potencial para reducir enfermedades no transmisibles y riesgos –diabetes mellitus, hipertrigliceridemia, lipoproteínas de baja densidad, hipetensión diastólica–, a través de la reducción del consumo, al ser alta la elasticidad del precio de estas bebidas. Además, los efectos incluso se amplifican a medio plazo, una vez establecidos nuevos hábitos de consumo más saludable. Los impuestos podrían fomentar la innovación empresarial sin infligir costes de pérdida de empleos y contribuirían a reducir el gradiente social de la obesidad.

La red sobre trabajo infantil peligroso (Red Tip

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Walter Varillas

2003-01-01

Full Text Available En el mundo, aproximadamente 351.7 millones de niños entre 5 y 17 años realizaban algún tipo de actividad económica, de ellos 170.5 millones (48.5% realizaban algún tipo de trabajo considerado peligroso. Un alto porcentaje se encuentra en la agricultura, otros en minas, manufacturas, ladrilleras, predominantemente en la economía informal. El Convenio 138 (cobre la edad mínima de admisión en el empleo de la OIT y el Convenio 182 (sobre las peores formas de trabajo infantil, definen como trabajo infantil peligroso el que puede afectar la salud, seguridad y moralidad de los menores. Estudios específicos sobre los menores muestran su susceptibilidad particular frente a los riesgos laborales, aumentando la peligrosidad para su normal desarrollo y crecimiento: "los niños no son adultos pequeños". Los profesionales de la seguridad y salud en el trabajo pueden colaborar con los profesionales y las organizaciones especializadas en el trabajo infantil, en la definición y caracterización de lo que significa el trabajo infantil peligroso. Para ello se ha conformado la Red sobre Trabajo Infantil Peligroso (Red TIP, con la finalidad de articular estos dos espacios, orientados a eliminar el trabajo infantil peligroso y rescatar al menor y devolverle la oportunidad de sonreír ahora y en el futuro.

X-RAY EMISSION FROM THE DOUBLE-BINARY OB-STAR SYSTEM QZ CAR (HD 93206)

International Nuclear Information System (INIS)

Parkin, E. R.; Naze, Y.; Rauw, G.; Broos, P. S.; Townsley, L. K.; Pittard, J. M.; Moffat, A. F. J.; Oskinova, L. M.; Waldron, W. L.

2011-01-01

X-ray observations of the double-binary OB-star system QZ Car (HD 93206) obtained with the Chandra X-ray Observatory over a period of roughly 2 years are presented. The respective orbits of systems A (O9.7 I+b2 v, P A = 21 days) and B (O8 III+o9 v, P B = 6 days) are reasonably well sampled by the observations, allowing the origin of the X-ray emission to be examined in detail. The X-ray spectra can be well fitted by an attenuated three-temperature thermal plasma model, characterized by cool, moderate, and hot plasma components at kT ≅ 0.2, 0.7, and 2 keV, respectively, and a circumstellar absorption of ≅0.2 x 10 22 cm -2 . Although the hot plasma component could be indicating the presence of wind-wind collision shocks in the system, the model fluxes calculated from spectral fits, with an average value of ≅7 x 10 -13 erg s -1 cm -2 , do not show a clear correlation with the orbits of the two constituent binaries. A semi-analytical model of QZ Car reveals that a stable momentum balance may not be established in either system A or B. Yet, despite this, system B is expected to produce an observed X-ray flux well in excess of the observations. If one considers the wind of the O8 III star to be disrupted by mass transfer, the model and observations are in far better agreement, which lends support to the previous suggestion of mass transfer in the O8 III + o9 v binary. We conclude that the X-ray emission from QZ Car can be reasonably well accounted for by a combination of contributions mainly from the single stars and the mutual wind-wind collision between systems A and B.

Identificarea izolatului bacterian P5 obţinut din plante de măr

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MAGHER Maria

2016-06-01

Full Text Available The phytopathogen Erwinia amylovora (Burrill Winslow et al. is a bacterium having a major impact on pome fruit species causing identification problems at some development phenophases of trees. The aim of this paper was to identify the bacterial isolate P5 obtained from apple tree samples using classical and modern methods recommended for the bacterium E. amylovora (API 20E test, gas chromatography, PCR, DASELISA and indirect immunofluorescence. As a result of our investigations, the bacterium Erwinia amylovora was clearly identified. Taking into consideration the quarantine status of the phytopathogen E. amylovora, it is necessary to carry out the phytosanitary test sin order to monitor the presence of fire blight on pome fruit species as well as to implement timely the required preventive and curative control measures. Rezumat. Fitopatogenul Erwinia amylovora (Burrill Winslow et al. este o bacterie cu un impact deosebit asupra speciilor pomicole sămânţoase, care prezintă probleme de identificare la anumite fenofaze de dezvoltare a pomilor. Scopul acestei lucrări a fost de a identifica izolatul bacterian P5, obţinut din probe de măr, prin metode clasice şi contemporane recomandate pentru bacteria E. amylovora (testul API 20E, gaz-cromatografie, PCR, DAS-ELISA, imunofluorescenţă indirectă. În rezultatul cercetărilor a fost identificată bacteria Erwinia amylovora. Având în vedere statutul de carantină al fitopatogenului E. amylovora, se impune necesitatea efectuării obligatorii a sondajelor fitosanitare pentru monitorizarea prezenţei focului bacterian la culturile pomicole sămânţoase şi efectuarea la timp a măsurilor preventive şi curative de combatere.

Sobre una Rodoficea parasita de Gelidiaceas

OpenAIRE

Seoane Camba, Juan Antonio

1982-01-01

En este trabajo se hace un estudio de una Rodofícea parásita, encontrada sobre Gelidium cantabricum Seoane-Camba y Gelidium sesquipedale (Clemente) Thuret. Por sus características generales atribuímos esta planta al género Gelidiocolax. descrito por Gardner en 1927 para un parásito de Gelidium pulchrum Gardner de las costas americanas del Pacífico...

Reflexões sobre a policy making e avaliação em política pública

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Flaviana C. V. P. M. Assumpção

2017-06-01

Full Text Available O presente artigo faz uma reflexão sobre a policymaking e os processos de avaliação em Política Pública sob a luz dos trabalhos escritos por Howlett et al, e os entendimentos dados, pelos autores pesquisados por eles, sobre os ciclos e subsistemas que compreendem os processos de Política Pública. Para entender sobre a tomada de decisão desses processos, foi estudado o autor Lindblom, para compreendermos quem são os atores políticos e como estes influenciam nas tomadas de decisões governamentais. Sobre a teoria da Política Pública e suas tipologias, fez necessária a leitura de T.J. Lowi e sua publicação de 1964. Para finalizar, tratamos sobre as formas de avaliação de uma Política Pública com os autores, Maria Cecília Barreira e Maria do Carmo Carvalho, no que tange as perspectivas da avaliação de políticas e programas sociais. Elizabeth Rico, sobre os processos avaliativos e Klauss Frey sobre as reflexões conceituais, dessas avaliações e suas implicações para a situação política brasileira.

Pregnancias. Sobre cuatro lavis de Colette Deblé

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Jacques Derrida

2013-07-01

Full Text Available ¿Cómo citar la representación del cuerpo femenino en la Historia del Arte occidental dejándose impregnar por los patrones y modelos pictóricos masculinos pero imprimiendo, a su vez, otras huellas, las de otro cuerpo? Esta pregunta atraviesa el texto del filósofo Jacques Derrida sobre las aguadas (lavis de la pintora francesa Colette Deblé, dando lugar a una reflexión sobre el engendramiento, el parto y la cita pictórica. En el trabajo de Colette Deblé, el legado de la Historia del Arte y su mitología engendrarán una serie infinita de aguadas donde el agua no pretende “lavar” la tradición (deshacerse de ella, acabar con ella sino inundarla, mojarla, empaparla con nuevas aguas para, escurriéndola, hacerla resonar nuevamente.

Conhecimento de pediatras que atuam em urgências e emergências sobre tratamento da anafilaxia

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João Carlos Pina Faria

2018-05-01

Full Text Available Introdução: Anafilaxia é uma reação sistêmica grave, aguda e potencialmente fatal. Apresenta vários desencadeantes e mecanismos diferentes, entretanto, o tratamento agudo é igual em todos os casos. Objetivo: Avaliar o conhecimento sobre tratamento da anafilaxia e choque anafilático (CA de pediatras que atuam em setor de emergência pediátrica. Métodos: Estudo transversal através da aplicação de questionário de múltiplas escolhas com 10 perguntas sobre tratamento da anafilaxia e CA. Foram convidados todos os pediatras do Pronto Socorro de um Hospital Público Pediátrico. Resultados: Cinquenta entre 51 pediatras concordaram em participar do estudo. A média de acertos foi 6,32 com mediana de 7 (mínimo 2 e máximo 10. Houve reconhecimento adequado dos pediatras sobre a droga de escolha para iniciar o tratamento da anafilaxia e CA em 96% e 92%, respectivamente. Sobre a via de administração da adrenalina, a adequação das respostas foi de 64%. Em relação à dose de adrenalina, 70% identificaram corretamente, porém, o conhecimento sobre a dose máxima foi de 44%. Ao perguntar o intervalo para repetir a adrenalina, 38% responderam corretamente. Perguntou-se sobre terapias adjuvantes no tratamento do CA com 74% de acerto. Sobre a droga que previne a reação anafilática bifásica, 60% responderam corretamente. Quanto ao tempo de observação, 54% responderam o período adequado. O acerto sobre apresentações disponíveis de adrenalina autoinjetável foi de 40%. Conclusão: Houve dificuldade principalmente em reconhecer dose máxima, dose de adrenalina autoinjetável e tempo necessário para ser repetida, o que aumenta o risco de superdosagem e seus efeitos adversos.

Creencias sobre la madurez psicológica en adultos dominicanos: un estudio sobre sus dimensiones evolutivas y de personalidad desde la perspectiva del conocimiento lego

OpenAIRE

Núñez Fernández, Ramón Onésimo

2015-01-01

Uno de los constructos psicológicos elaborados por la psicología más empleado, pero menos definido con precisión es el de la “madurez psicológica” o “madurez personal”; y aunque hoy día podemos encontrar definiciones de algún modo explicitas sobre el constructo en esencia poco nos dicen sobre su significado social. El interés fundamental de esta tesis está basado en la exploración de las creencias e ideas que tienes las personas adultas acerca del contructo de madurez personal y las dimension...

Proposta de metodologia para avaliação de redes de voz sobre IP

OpenAIRE

Vandersilvio da Silva

2006-01-01

A redução de custo com telefonia através do uso de voz sobre IP tem disparado a busca de soluções que transformem redes IP originalmente dedicadas a transporte de dados em redes para transporte de voz. Esta dissertação tem por objetivo apresentar uma metodologia para sistematizar a avaliação de redes para o tráfego de voz sobre IP de acordo com as possibilidades disponíveis no cenário a ser avaliado. Inicialmente é dada uma visão geral de voz sobre IP, apresentando os protocolos utilizados, o...

Reflexiones sobre la tutoría como función del profesor universitario

OpenAIRE

López Lucas, María del Carmen

2002-01-01

En el artículo se reflexiona sobre la tutoría, los motivos, los ámbitos de aplicación, cómo hacer una tutoría personalizada y cómo la entrevista en la tutoría individual, y por último, se reflexiona sobre el momento más adecuado para realizarse.

As opinioes dos brasileiros sobre ciencia e tecnologia: o paradoxo da relacao entre informacao e atitudes

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Yurij Castelfranchi

2013-11-01

Full Text Available Em muitos debates sobre as relações entre ciência e sociedade, em particular quanto à aceitação das tecnologias ou à percepção de seus riscos, existe uma hipótese subjacente: a de que a ignorância gera medo, e o medo gera desconfiança ou hostilidade contra a ciência e a tecnologia. Neste artigo mostramos que essa hipótese é questionável. Com base numa recente enquete nacional, apontamos que atitudes otimistas sobre ciência e tecnologia não dependem do nível escolar ou da informação declarada ou acessada pelas pessoas sobre o tema. Indivíduos com escassa informação possuem, em geral, atitudes positivas. Pessoas com maior escolaridade e acesso à informação possuem atitudes diversificadas, otimistas sobre alguns aspectos, porém mais críticas sobre outros.

HD 144548: A young triply eclipsing system in the Upper Scorpius OB association

Science.gov (United States)

Alonso, R.; Deeg, H. J.; Hoyer, S.; Lodieu, N.; Palle, E.; Sanchis-Ojeda, R.

2015-12-01

The star HD 144548 (=HIP 78977; TYP 6212-1273-1) has been known as a detached eclipsing binary and a bona-fide member of the Upper Scorpius OB association. Continuous photometry from the K2 mission on Campaign Two has revealed the presence of additional eclipses due to the presence of a third star in the system. These are explained by a system composed of the two previously known members of the eclipsing system (Ba and Bb) with a period of 1.63 d, orbiting around an F7-F8V star with a period of 33.945 ± 0.002 d in an eccentric orbit (eA = 0.2652 ± 0.0003). The timing of the eclipses of Ba and Bb reveals the same 33.9 d periodicity, which we interpret as the combination of a light time effect combined with dynamical perturbations on the close system. Here we combine radial velocities and analytical approximations for the timing of the eclipses to derive masses and radii for the three components of the system. We obtain a mass of 1.44 ± 0.04 M⊙ and radius of 2.41 ± 0.03 R⊙ for the A component, and almost identical masses and radii of about 0.96 M⊙ and 1.33 R⊙ for each of the two components of the close binary. HD 144548 is the first triply eclipsing system for which radial velocities of all components could be measured. Partially based on observations made with the Italian Telescopio Nazionale Galileo (TNG) operated by the Fundación Galileo Galilei of the INAF, the Nordic Optical Telescope, operated by the Nordic Optical Telescope Scientific Association, and the William Herschel Telescope (programme DDT58 - PI Lodieu) operated by the Isaac Newton Group on the island of La Palma at the Spanish Observatorio Roque de los Muchachos of the IAC. This paper includes data collected by the Kepler mission. Funding for the Kepler mission is provided by the NASA Science Mission directorate.Appendices are available in electronic form at http://www.aanda.org

Algunas consideraciones sobre la estrategia de mercadotecnia en los negocios internacionales

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Ernesto Raúl González Ramírez

2016-01-01

Full Text Available El presente artículo aborda algunas consideraciones sobre la estrategia de mercadotecnia en el contexto de los negocios internacionales. La primera parte está dirigida a describir las particularidades de las estrategias específicas de mercadotecnia (producto, precio, comunicación y distribución en el área internacional. La segunda parte, trata sobre la importancia de tener presente el nivel de orientación al mercado o aplicación del concepto de mercadotecnia en este contexto.

GOBERNABILIDAD SOBRE EL RECURSO HÍDRICO EN COLOMBIA: ENTRE AVANCES Y RETOS

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ZAMUDIO RODRÍGUEZ CARMEN

2012-12-01

Full Text Available Este trabajo corresponde a una revisión general sobre la gestión del agua en Colombia, en la cual se enfatiza la gobernabilidad como un elemento fundamental en este tipo de procesos. Por lo tanto, a partir de la recopilación y análisis de información secundaria, se identifica la evolución de la gestión del agua en el país y, en esa medida, los aspectos que permiten evidenciar una crisis de gobernabilidad en esta materia. En tal sentido, inicialmente se plantean algunos aspectos relevantes para abordar el análisis de la gestión integrada del recurso hídrico y la gobernabilidad del agua. Más adelante, se abordan factores que reflejan que pese a importantes avances en la gestión del agua en el país, todavía es incipiente un enfoque integral que considere múltiples criterios para facilitar la gobernabilidad sobre el recurso hídrico. Así, se plantea que existe una crisis de gobernabilidad sobre el agua, que se expresa en términos del desconocimiento de la experiencia y contexto internacional, la descoordinación y dispersión de la política del agua, el desconocimiento de las diversas formas locales de gobierno, la percepción errónea sobre la abundancia y riqueza hídrica del país y el disimulo o desinterés con que se ignoran las múltiples presiones que se ciernen sobre el agua.  

REVISÃO INTEGRATIVA DA LITERATURA SOBRE A INFLUENZA AH1N1

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Laura Cavalcanti de Farias Brehmer

2011-01-01

Full Text Available Tuvo como objetivo conocer la producción de conocimiento acerca de la influenza AH1N1, de la literatura sobre el tema relacionado con la aparición de la pandemia. Se trata de una revisión integradora de la literatura, que fue utilizado como criterio de selección, los artículos indizados en PubMed y SciELO en el período 2005 a 2009, en portugués, inglés o español. La muestra consistió de 14 publicaciones, todos publicados en 2009. Hubo una importante contribución de los estudios brasileños sobre el tema y los investigadores en salud pública. La investigación ha ayudado a entender la epidemiología de la enfermedad, incluyendo el perfil de los casos, la mortalidad de la enfermedad, el manejo terapéutico y factores de riesgo. Era evidente que no hay estudios sobre la enfermedad, que puede subsidiar la construcción de políticas para hacer frente mejor a esta y otras pandemias, así como ser capaces de sensibilizar a la sociedad sobre la importancia de las medidas preventivas

Tiempo de feminismo. Sobre feminismo, proyecto ilustrado y postmodernidad, de Celia Amorós [Ressenya

OpenAIRE

Campillo, Neus

1998-01-01

Se trata de una reseña sobre el libro Amorós, C., Tiemp de feminismo. Sobre feminismo, proyecto ilustrado y postmodernidad. Madrid, Cátedra, Universitat de Valencia, Instituto de la Mujer, 1997, 463 pp.

Elaborando uma cartilha sobre as ambiguidades da violência conjugal

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Kátia Lenz-de-Oliveira

Full Text Available O texto é um relato de experiência em um projeto de extensão universitária que elaborou e testou junto a grupos comunitários uma cartilha sobre violência conjugal direcionada tanto a mulheres quanto a homens, tendo como proposta construir uma comunicação que explicitasse e avaliasse os diferentes sentimentos e crenças relacionados ao tema, e ainda que respeitasse as possibilidades e os desejos de cada leitor. A abordagem de intervenção comunitária foi ancorada no construcionismo social. O tema da violência conjugal foi apresentado na cartilha tendo por base um esforço para articular as contribuições advindas tanto dos movimentos feministas como de outros estudiosos, mantendo a politização do tema. O processo de produção da cartilha é relatado buscando refletir sobre as dificuldades e as mudanças vivenciadas diante dos textos sobre o tema, dos testes do primeiro esboço junto a grupos comunitários, dos consultores e de feministas, de forma a apontar o fato de nossa atenção ter se concentrado em quatro categorias de análise do problema: dominação masculina, diversidade, amor romântico e ambigüidades, sendo a última a que nos pareceu ser mais amplamente debatida e apreendida por qualquer vertente de discussão diante do tema, embora todas sejam imprescindíveis. Por fim, apontamos nossa avaliação sobre os limites e os potenciais da última versão da cartilha.

Gestión del marketing sensorial sobre la experiencia del consumidor

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Leonardo Ortegón-Cortázar

2016-01-01

Full Text Available El rápido desarrollo de mercados con productos competitivos de difícil diferenciación y consumidores mejor informados que demandan experiencias memorables, justifican estudiar los elementos sensoriales que pueden potenciar e influir positivamente sobre dichas experiencias. El objetivo de este artículo es analizar el estado del arte respecto a la gestión y uso del marketing sensorial sobre la experiencia del consumidor. El diseño de investigación es no experimental documental, con un tipo de estudio descriptivo, empleando fuentes de recolección de información secundarias, mediante un arqueo bibliográfico de revistas de impacto que figuran en bases de datos de libre acceso. Los resultados revelan la dominancia del sentido de la visión sobre la persuasión y las actividades de marketing, mientras que el sentido del olfato demuestra mayor influencia sobre el nivel de recuerdo y evocación de información. Se concluye la utilidad de jerarquizar por nivel de influencia las actividades de estimulación sensorial en marketing a partir del funcionamiento y participación de los sentidos humanos y poder combinar dichas estimulaciones como medio para maximizar la experiencia del consumidor y distinguir la oferta de valor, considerando el grado de diferenciación, la favorabilidad y la fuerza de la actividad sensorial basada en planeación estratégica empresarial.

El efecto de la maternidad sobre los salarios femeninos en Ecuador

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Héctor Alberto Botello

2015-01-01

Full Text Available En el presente trabajo se analiza el efecto de la maternidad sobre los salarios femeninos del año 2012 en el Ecuador estudiando sobre la tenencia, el número y la estructura de edad de los hijos. La metodología implementa ecuaciones mincerianas sobre los datos del ingreso laboral provenientes de las encuestas de hogares; para posteriormente descomponer el diferencial con el método de Oaxaca Blinder con corrección sobre el sesgo de selección. Los resultados muestran que las madres ganan en promedio 7,56% menos que las no madres, presentándose una alta heterogeneidad entre las provincias analizadas y los niveles educativos. Luego de controlar la edad de los hijos se aprecia que las madres de niños de menos de 5 años ganan un 10% menos, mientras que las madres que tienen niños de más de 5 años, la disminución es de solo el 2%. Por número, si la mujer tiene a su cuidado dos hijos la brecha por maternidad promedio es del 3,7% y si tiene más de dos hijos la rebaja es del 2,26%. No obstante, la mayor parte de la brecha por maternidad en el Ecuador no está causada por el hecho de ser madres sino por sus características socioeconómicas intrínsecas.

Notas sobre la historia de la garza morena ardea cocoi (aves en Colombia

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José Ignacio Borrero H.

1982-01-01

Full Text Available Una revisión de la bibliografía sobre esta especie, demuestra que si bien existe una serie de notas relacionadas con su distribución geográfica, prácticamente nada se ha escrito en relación con sus costumbres, fuera claro está, de comentarios muy generales consignados en manuales sobre faunas regionales.

Contabilidad de Costos I. - Problemas sobre la contabilización de las actividades relacionadas con los costos indirectos de fabricación

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Morillo Moreno, Marysela C.

2008-01-01

ÍNDICE Introducción Problemas sobre terminología básica Problemas básicos sobre el Ciclo de la Contabilidad de Costos Problemas sobre contabilización de las actividades relacionadas con los materiales Problemas sobre la contabilización de las actividades relacionadas con la mano de obra Problemas sobre la contabilización de las actividades relacionadas con los costos indirectos de fabricación Problemas sobre el Ciclo de la Contabilida...

MITOS Y LEYENDAS SOBRE LOS JUEGOS DE ROL

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Rocío Tizón

2010-11-01

Full Text Available Los juegos de rol aparecen en la década de los años 70 en Estados Unidos, creados por Gary Gigax y Dave Arneson, padres del ya famoso Dragones & Mazmorras. No obstante, fueron pocos los años de tranquilidad, ya que en su país natal se le consideró culpable de promover el suicidio de varios adolescentes que habían sido jugadores de Dragones & Mazmorras. Los engaños de la información y los prejuicios de las noticias sobre estos juegos de rol provocaron que varias personas se interesaran por este fenómeno, analizando dichos mitos y comprobando la verdad de estos rumores. Uno de estos estudiosos fue William Watson, creador de la página web The Inquirer, en la que se dedica a desmontar estos y otros tópicos sobre juegos de rol.

Notas sobre o escândalo e o cinismo de Manet

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Tereza Calomeni

2013-10-01

Full Text Available Em 1971, Foucault profere, em Túnis, uma conferência sobre a pintura de Manet. Em 1984, em A coragem da verdade, último curso oferecido no Collège de France, analisando o cinismo como expressão da parresia, novamente se refere ao pintor ao relacionar arte moderna e cinismo. A partir dos dois textos, o artigo reflete sobre o escândalo de Olympia, uma das treze telas examinadas na conferência, e a relação, estabelecida no curso, entre arte moderna e cinismo.

Taller sobre Violencias de Género 2.0. Diseño

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Prado Soto, María Nieves; Vilà Baños, Ruth

2015-01-01

El taller sobre Violencia de Género 2.0 trata la problemática de aquella violencia que se ejerce sobre las mujeres y otros grupos de personas (homosexuales, transexuales…) a causa de la desigualdad de géneros estipulada desde el sistema patriarcal. En la sociedad actual, donde el uso de la tecnología es un aspecto normalizado en nuestras vidas, este tipo de violencia es ejercida no solo cara a cara, sino también en los espacios virtuales de los que hacemos uso diariamente. El taller me...

CONSIDERACIONES ACERCA DE LA DIRECTIVA 2004/35/CE SOBRE RESPONSABILIDAD MEDIOAMBIENTAL

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Mariano H. Novelli

2012-01-01

RESUMOEl presente estudio analiza, desde una perspectiva integral, el sistema instituido por la Directiva 2004/35/CE sobre responsabilidad medioambiental. Se focaliza sobre el régimen para la prevención y reparación de daños medioambientales que establece dicha norma, a la cual concibe como un exponente de la renovación del Derecho de Daños, rama jurídica que en tiempo reciente ha ampliado sus funciones incorporando a la clásica finalidad resarcitoria una tutela que procura la actuación ex an...

Percepciones sobre el uso del condón y la sexualidad entre jóvenes

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J. Isaac Uribe; Genoveva Amador; Ximena Zacarías; Leticia Villarreal

2012-01-01

El objetivo fue determinar la relación entre percepciones sobre el uso del condón y la actividad sexual de riesgo en jóvenes universitarios y universitarias. Participaron 273 hombres y mujeres estudiantes de pregrado con rango de edad de 19 a 25 años. Aplicamos una escala tipo Likert con 31 reactivos, con cuatro dimensiones que miden percepción negativa del uso del condón, conocimientos sobre conducta sexual segura y creencias erróneas sobre las ITS y el uso del condón. Mostramos diferenci...

Sobre aprendizaje escolar y neurociencias

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Terigi, Flavia

2016-01-01

En el marco de una creciente difusión de los discursos de y sobre las neurociencias en el campo educativo en Argentina, donde enunciados extraídos del discurso neurocientífico comienzan a transformarse en emblemas de política pública, este trabajo, escrito desde el punto de vista de la educación escolar, se propone situar los alcances y límites de los aportes de estas disciplinas para comprender el aprendizaje escolar. En él se postula que la aparición rutilante de las neurociencias en educac...

Contabilidad del impuesto sobre beneficios

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Luceño Martínez, Haizea

2017-01-01

Este Trabajo Fin de Grado pretende dar una explicación al tratamiento contable del Impuesto de Sociedades. Siendo un impuesto que hay que contabilizar, pero que se calcula siguiendo criterios fiscales, lleva a tener que realizar ajustes que tendrán su repercusión contable. El punto de partida no es otra que la norma de registro y valoración 13ª del PGC, que versa sobre cómo hay que proceder a contabilizar el Gasto por Impuesto de Sociedades, que se compone tanto del Gasto por Impuesto Co...

Efeito de herbicidas sobre agentes fitopatogênicos = Effect of herbicides on phytopathogenic agents

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Daniel Dias Rosa

2010-07-01

Full Text Available Na agricultura moderna, diversas tecnologias auxiliam no aumento daprodutividade, sendo o herbicida uma delas, mas existem consequências atreladas ao seu uso, como os diversos efeitos sobre organismos não alvos. Neste trabalho, objetivou-se verificar esses efeitos sobre agentes fitopatogênicos, assim como avaliar o efeito do herbicida glyphosate sobre diversas doenças, em plantas de soja transgênicas.Verificou-se forte ação fungicida com o uso do herbicida glyphosate, assim como os outros avaliados “in vitro”, sobre os fungos testados, e os mesmos resultados foram observados nas plantas em condição de campo.In modern agriculture, several technologies have helped increase productivity, and herbicide is one of them. However, there are consequences linked to its use, such as the various effects on non-target organisms. The purpose of this work was to verify these effects on phytopathogenic agents, as well as assess the effect of glyphosate on diseases in transgenic soybean. There was a strong fungicide action using glyphosate herbicide as well as with the others evaluated in vitro regarding fungi tested. The same results were observed in plants in field conditions.

Efecto de las cargas articulares sobre el flujo y pH salival

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Castro, R.J.; Bravo, C.; Alcaino, V.; Giacaman, R.A.

2011-01-01

Una alteración del flujo salival es clave en el desarrollo de caries, enfermedad periodontal e infecciones oportunistas. El flujo salival está determinado por diversos estímulos que actúan sobre receptores de distinta naturaleza, entre ellos mecanoreceptores articulares. Algunos estudios demuestran que las cargas articulares actúan sobre estos receptores, modificando cualitativa y cuantitativamente la secreción salival. El objetivo de este estudio fue determinar si existe una relación entre l...

Conocimiento sobre salud buco-dental de las embarazadas. Consultorio La California. 2012

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Yero Mier, Ileana María; García Rodríguez, Marisel; Reytor Saavedra, Eduardo; Nazco Barrios, Lidia Ester

2013-01-01

Fundamento: existe desconocimiento sobre salud bucal de las embarazadas, como consecuencia acuden con frecuencia a los servicios de estomatología. Objetivo: identificar el nivel de conocimiento sobre salud buco-dental en pacientes embarazadas del Consultorio La California. 2012. Metodología: se realizó estudio observacional descriptivo. La población y la muestra fueron 93 embarazadas que asistieron a la consulta estomatológica. Se analizaron diferentes afecciones e identificación de factores ...

Blind parents: their experience in care for their children Padres ciegos: experiencias sobre el cuidado de los hijos Pais cegos: experiências sobre o cuidado dos seus filhos

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Lorita Marlena Freitag Pagliuca

2009-04-01

Full Text Available This study reflects on the difficulties and strategies of blind parents to take care of their children. The situations were related to breastfeeding, bathing, feeding, domestic accidents and administering medication. They use touch, hearing, smelling and the support network, contributing to their autonomy.Reflexiones sobre las dificultades y las estrategias que los padres ciegos usan cuando cuidan a sus hijos. Las situaciones se refieren a amamantar, bañar, alimentar, accidentes domésticos y dar remedios; también sobre el uso del tacto, la audición y el olfato. La importancia de la red social que contribuye para su autonomía.Reflexões sobre dificuldades e estratégias de pais cegos, quando cuidam de seus filhos. As situações referiam-se a amamentar, banhar, alimentar, acidentes domésticos e dar remédio, e o tato, audição e olfato e a rede social contribuindo para sua autonomia.

Conocimiento sobre consentimiento informado de médicos en formación

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Salomón Zavala

2010-04-01

Full Text Available Objetivo: Evaluar qué saben sobre consentimiento informado los postulantes a la residencia médica. Diseño: Cuestionario sobre consentimiento informado. Institución: Facultad de Medicina, Universidad Nacional Mayor de San Marcos. Participantes: Médicos postulantes al examen de admisión a la residencia médica. Metodología: Se elaboró un examen de conocimiento con preguntas de elección múltiple. Participaron en el estudio 1 486 (95% postulantes a las plazas de residencia médica de la Universidad Nacional Mayor de San Marcos, 2009. Se elaboró una base de datos en Excel y se utilizó el paquete estadístico SPSS 15 para análisis de frecuencia; y Atlas ti para análisis cualitativo. La participación en el estudio fue voluntaria y anónima. Principales medidas de resultados: Conocimiento sobre consentimiento informado. Resultados: De los 1 486 participantes, 56% fue varón, con edad media de 31,5 (DE 5,1 años, rango entre 23 y 58 años, egresados de 26 escuelas de medicina del país y 14 del exterior; uno de cada tres egresó entre 2007 y 2008. La gran mayoría (84% respondió que respetar la autonomía del paciente significa mejorar la comunicación médico paciente; y tres de cada cuatro, que obtener el consentimiento informado es un imperativo ético. La frecuencia de aciertos disminuyó en las preguntas sobre información sobre quién determina la capacidad mental y qué hacer cuando un paciente rechaza tratamiento. Conclusiones: La población de estudio fue heterogénea en edad, universidad de origen y año de egreso. Se identificó deficiencias en conocimiento del consentimiento informado.

OPINIÃO PÚBLICA SOBRE A PENA DE MORTE

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LAMONICA, L.C.R

2015-12-01

Full Text Available A teoria nos indica que existem muitas influências sobre a avaliação das pessoas acerca da pena de morte (MENIN, 2005; LARANJEIRAS, 2007. Autores reconhecem que os meios de comunicação instigam a população a desejar vingança, como se isso resolvesse o problema da violência (MELLO, 1999. Outros acreditam existir uma série de questões que precisam ser transformadas para que pensemos numa pena de morte, como: a segurança pública, o desemprego, o sistema prisional e as formas alternativas de punição (CRITSNELIS, 2009, também é possível encontrar autores que veem positivamente o emprego da pena de morte e seus argumentos tem caráter religioso, humanista, judicial e social (BARRETO, 1983. Este estudo tem como objetivo identificar, ainda que em pequena esfera, o que as pessoas em Campos pensam sobre a pena de morte. Inicialmente uma pesquisa bibliográfica foi realizada. Elaborou-se um questionário objetivo composto de 3 perguntas. O público alvo foi Homens e Mulheres maiores de 18 anos, abordados nas imediações do ISECENSA, sendo um total de 40 pessoas. Posteriormente os dados foram tabulados gerando as informações da pesquisa. Perguntamos aos participantes se eles concordavam que é possível haver a reabilitação do ser humano e obtivemos que 75% concordavam que é possível. Aproximadamente 20% discordavam, não plenamente, mas acreditavam que raras vezes era possível a reabilitação. O restante não tinha uma opinião sobre a questão. 60% (a maioria das pessoas concordaram que a reforma das leis resolveria o problema da violência, outros 15% não chegaram a uma conclusão sobre a determinada pergunta e 25% dos entrevistados discordam. Cerca de 30% concordaram com a pena de morte, aproximadamente 20% não tinham pensado no assunto e os 45%, maioria, discordaram que a pena de morte é uma lei necessária no Brasil. Como dado mais expressivo, ressaltamos que a maior parte das pessoas abordadas acreditam que é poss

Planteamientos sobre la pobreza: una aproximación conceptual

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Bertha Lucía Martínez Bernal

2015-07-01

Full Text Available En el presente artículo se presentan varias definiciones o conceptos para la comprensión, medición y el análisis de la pobreza. Para ello se retoma la producción escrita de diferentes estudiosos e investigadores que han hecho aportes valiosos sobre el tema. Al lado de estos conceptos se analizan los diferentes enfoques que se utilizan para aproximarse al estudio de la pobreza, aunque estas no son teorías ni explicaciones de sus causas, sino perspectivas sobre pobreza que denotan dichos enfoques. Así mismo se desarrolla una revisión de las metodologías más utilizadas en los procesos de identificación y agregación. Finalmente se interpretan las políticas públicas en los sectores sociales.

Voz sobre frame relay

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D´Elia, Gabriel Anibal

2000-01-01

Esta tesis trata el tema de VOFR, desde la digitalización de la voz hasta su transmisión a través de dicha red, así también como la comparación con otros medios de transporte como VOIP. Dada las características del protocolo frame relay y su disponibilidad se eligió como el medio más apropiado para la transmisión de voz y datos en forma integrada sobre una misma red. El trabajo comienza con una breve explicación de la voz, su digitalización y forma actual de transmisión a través de una red di...

Cultura e Diversidade. Considerações sobre a multiplicidade das manifestações

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Milton Araújo Moura

2010-06-01

Full Text Available A diversidade cultural é hoje um tema estabelecido no contexto internacional das discussões sobre contemporaneidade. A questão fundamental deste artigo é a forma como as manifestações culturais podem ser produzidas, reconhecidas e legitimadas em termos de sua diversidade. Neste sentido, colocam-se elementos para perceber como esta problemática tem amadurecido no campo dos Estudos Culturais e, mais especificamente, na reflexão sobre o turismo cultural. Em seguida, a discussão é contextualizada em termos de Brasil. Após várias décadas em busca de nuclearidades de uma cultura brasileira, hoje se coloca, de preferência, o desafio de considerar a complexidade e multiplicidade desta formação. Finalmente, colocam-se alguns questionamentos mais radicais sobre a diversidade cultural.

¿El armario está abierto?: estudios sobre diversidad sexual en El Salvador

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Amaral Palevi Gómez Arévalo

2017-12-01

Full Text Available El presente texto tiene por objetivo analizar 39 producciones universitarias sobre diferentes temáticas de diversidad sexual producidas entre 1988 a 2015, las cuales se organizan en 4 ejes/binomios: Prácticas sexuales/Cuerpos, Matrimonio/Familias, Identidades/Prejuicios y Derechos/Ciudadanías. Al mismo tiempo se proponen nuevas temáticas para investigar y se reflexiona sobre los retos al interior de la educación superior salvadoreña para constituir un campo de Estudios sobre Diversidad Sexual. Concluyendo, a pesar de la existencia dispersa de 39 producciones universitarias, las cuales son un avance, el armario de la academia salvadoreña está aún cerrado, y por tal motivo surge la pregunta ¿cómo lo podemos abrir?

Adolescentes consumidores de televisión: autopercepciones sobre sus derechos

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María Ángeles Espinosa Bayal

2014-07-01

Full Text Available El artículo analiza la percepción que tiene una muestra representativa de la población española de entre 12 y 18 años sobre la protección de sus derechos en las cadenas de televisión. Para conseguir este objetivo, se aplicó un cuestionario de 59 preguntas diseñado para una investigación más amplia en la que se analizaba la opinión de los menores sobre la protección de sus derechos en la televisión y en Internet. Ninguna pregunta del cuestionario se refería a cadenas o programas concretos identificados por los investigadores y la información sobre estos partía de la propia opinión de los adolescentes. Los resultados que se presentan se refieren a los datos sobre televisión y, más concretamente, al respeto por los derechos fundamentales de los telespectadores en general, y de los de los menores en particular. De estos resultados se concluye que los adolescentes perciben claramente la vulneración de los derechos de igualdad, dignidad e intimidad, a la información objetiva veraz y plural y a la libre expresión y opinión –especialmente cuando ésta se refiere a los niños–. Igualmente muestran una postura crítica y de rechazo hacia los tipos de programas que no respetan sus derechos. Se propone utilizar esta capacidad crítica de los telespectadores desde una doble perspectiva: por una parte para crear escuela de ciudadanía y, por otra, para generar una sociedad más justa y equitativa.

Apuntes sobre el Cultivo del Cacao

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Ochoa Horacio

1940-03-01

Full Text Available Por muchos años permaneció el cultivo del cacao en nuestro país, en un deplorable atraso técnico; el agricultor a duras penas si tenía conocimientos generales de su explotación y, de una industria que tuvo su auge debido a la extensividad de las plantaciones, hoy sólo resta una reducida porción de ella. ¿Qué factores operaron esa tan notoria reducción hasta el punto de que exportadores en otros tiempos nos convertimos en importadores obligados de ese producto? Hay muchas razones de orden técnico y de orden económico. Los cacaotaleros obtenían halagadoras retribuciones cuando el jornal consistía en la alimentación que se le daba a la peonada y cuando, generoso, añadía una sobretasa en dinero. Bajo ese sistema de explotación, el descuadre que pudiera ocasionar tanto las enfermedades criptogámicas como los plagas, no era suficiente como para provocar el pesimismo en el hacendado y por tanto inducirlo al abandono de la plantación. A medida que las condiciones sociales del campesino se fueron modificando y su standard de vida aumentaba, cambió fundamentalmente el mecanismo de la industria Se observó entonces que los árboles morían y que era pobre la producción; que lo que en tiempos pasados fuera un negocio lucrativo, se les había convertido en una actividad improductiva y, para controlar estos fenómenos que se generalizaban en todas las zonas cacaotaleras, opusieron la ignorancia, el rutinarismo y la desidia. Lentamente se han ido modificando los conceptos antiguos sobre el trabajo cultural y los cuidados que con relación a las enfermedades y plagas requiere este delicado cultivo; la rutina está echando paso atrás y las experiencias científicas que procuran la prosperidad del plantío, se ponen en práctica en algunas zonas . Esto da esperanza para la reconstitución de la industria cacaotalera en nuestro país, que cuenta con inmensas regiones de óptima calidad para hacerla florecer sobre bases nuevas, con

Sobre fuentes, temporalidad y escritura de la historia

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Germán Colmenares

1987-01-01

Full Text Available Una exposición sobre métodos históricos no puede reducirse a una mera colección de recetas sobre la manera como debe conducirse una investigación desde el momento en que se selecciona un tema monográfico, se localizan las fuentes aprovechables y se someten a variados procedimientos críticos y cuantitativos, hasta cuando se acomete la empresa final de la presentación narrativa o analítica de los resultados. Cada uno de estos pasos ha recibido un énfasis diferente en diferentes épocas, tipificando así una escuela o toda una manera de concebir la tarea historiográfica. El primero de ellos, por ejemplo, no parece recelar mayores dificultades. Sin embargo, cuando en él se considera incluido el planteamiento de un problema y la identificación de los elementos que lo constituyen, entonces resulta encerrar el mayor número de cuestiones teóricas.

Conocimientos sobre sexualidad y su influencia en el embarazo en adolescentes

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Carmina Alexandra García Macías

2017-06-01

Full Text Available Introducción: El embarazo en la adolescencia es en la actualidad un problema de salud que genera serias consecuencias personales, sociales y económicas, con repercusión en la salud individual, familiar y colectiva. Objetivo: Identificar los conocimientos sobre la sexualidad y su influencia en el embarazo en la adolescencia. Métodos: Se realizó un estudio observacional analítico, transversal, en un universo de 80 adolescentes de 15 a 19 años del Equipo Urbano de Salud 23 Latacunga, a quienes se les aplicó una encuesta sobre sexualidad y métodos anticonceptivos; los datos fueron procesados en el programa SPSS, el análisis se realizó mediante el test de Chi Cuadrado con un nivel de significación de p<0.05. Resultados: La mayoría de los adolescentes presentó conocimientos insuficientes sobre sexualidad (n=50 62.5%. El inicio de las relaciones sexuales predominó a los 15 años (n=11 13.7%; el uso de métodos anticonceptivos en la primera relación sexual fue bajo (n=30 37.5%; el método anticonceptivo más utilizado fue el condón con un (n=22 27.5%, a continuación, se ubicaron los anticonceptivos naturales.  Conclusiones: Predominó el desconocimiento sobre sexualidad y métodos anticonceptivos, a la vez fue temprano el inicio de la vida sexual con un poco utilización de métodos de anticoncepción.

Hacia un itinerario conceptual sobre la noción de capital social*

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Cristancho Giraldo, Laura Andrea; Universidad de San Buenaventura Bogotá

2015-01-01

El presente artículo tiene como objeto exponer las diferentes concepciones de naturaleza primaria que se han elaborado sobre la noción de capital social. Asimismo, se presentará una taxonomía en la cual se indicarán las convergencias, divergencias y particularidades que comparten de manera implícita o explícita. Por último, se esbozará, a modo de inferencia, una conceptualización holística sobre la expresión en cuestión.

Efectos subletales de la lambda-cialotrina sobre eisenia fetida (Annelida, Oligochaeta, Lumbricidae)

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Ricardo, Tamara; Maitre, Maria Ines; Rodriguez, Alba Rut

2017-01-01

El uso intensivo de agroquímicos provoca efectos indeseables sobre la fauna no blanco. Dentro de la misma, los oligoquetos contribuyen a mantener la estructura y fertilidad del suelo. La lambda-cialotrina es uno de los insecticidas piretroides más utilizados en Argentina, pero son escasos los datos existentes acerca de su toxicidad sobre oligoquetos. Los objetivos de este trabajo fueron evaluar mediante bioensayos de toxicidad crónica los efectos de lambda-cialotrina (producto comercial al 5%...

La bibliografia en inglés sobre la economía colombiana (1978-1983

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Thoumi Franscisco Elías

1984-12-01

Full Text Available En este ensayo se pretende lograr varios fines. Primero, presentar en forma comentada los libros, capítulos de libros, monografias y artículos académicos que se han publicado en inglés recientemente y cuyo objeto de estudio principal o parcial ha sido la economía colombiana. Segundo, identificar algunas características de las investigaciones sobre la economía colombiana efectuadas en los Estados Unidos. En esta forma,
la audiencia académica colombiana puede informarse sobre publicaciones existentes en inglés y sobre la imagen de Colombia como objeto de investigación en los ámbitos de habla inglesa.

Influencia de la lactancia materna sobre el desarrollo psicomotor y mental del niño

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Gómez Sanchiz, Manuela

2003-01-01

En 1929 Hoefer y Hardy plantearon la hipótesis que la lactancia materna influía sobre el desarrollo mental del niño, además del físico. Los resultados de las investigaciones realizadas en esta área, hasta el momento, son contradictorios; no obstante una meta-análisis publicado en el año 1999 concluye que la lactancia materna influye positivamente sobre el desarrollo mental del niño, tanto a término como pretérmino. El objetivo del estudio fue analizar los efectos de la lactancia materna sobre...

Algumas considerações sobre a sociologia de Alfred Schutz

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Márcio Nicory Costa Souza

2012-07-01

Full Text Available http://dx.doi.org/10.5007/1806-5023.2012v9n1p1 O presente artigo apresenta algumas considerações sobre a perspectiva sociológica de Alfred Schutz. Para tal, tecemos breves considerações sobre a fenomenologia, em especial a partir das contribuições de Husserl. Trata-se, portanto, de um esforço para o entendimento de sua importância para as Ciências Sociais. Primeiramente, apresentamos as influências constitutivas do pensamento de Schutz, bem como suas principais ferramentas analíticas. Em seguida, pensando no “fazer ciência”, procedemos para reflexões analíticas da proposta de uma Sociologia Interpretativa.

LA INVESTIGACIÓN SOBRE COACHING EN FORMACIÓN DEL PROFESORADO: UNA REVISIÓN DE ESTUDIOS QUE IMPACTAN EN LA CONCIENCIA SOBRE LA PRÁCTICA DOCENTE

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Rocío Jiménez

2012-01-01

Full Text Available Este trabajo ofrece una revisión de estudios empíricos basados en el proceso de coaching como estrategia eficaz en la formación del profesorado tanto inicial como permanente. Los objetivos seconcretan en: a ofrecer la situación de la investigación actual sobre coaching en este ámbito, b establecer diferencias y similitudes entre los procesos de coaching en experiencias reales y eficaces de formación del profesorado, c delimitar los principios y constructos teórico-operativos del coaching como estrategia formativa e investigadora y d identificar líneas y retos para la investigación futura sobre la conciencia del profesorado y la transferibilidad de aprendizajes a lapráctica. El método de revisión bibliográfica se concreta en búsquedas automatizadas en bases de datos digitales especializadas en educación (ERIC o ISOC, así como, en revistas especializadas, enformación del profesorado, tanto españolas como internacionales, situadas en el primer o segundo cuartil de INRECS o indexadas en JCR con un factor de impacto superior a 0.6. Se usa un sistema de citación superior como el Science Citation Index, a partir de referencias claves. La selección de artículos científicos, siguiendo criterios específicos, reúne un total de 8 estudios. La revisión, muestra como resultado, las características del coaching como estrategia formativa y de investigación y ofrece una visión sobre el estado de la investigación, así como, una base teórica y práctica para futuras investigaciones que construyan conocimiento sobre este tema.

SOBRE AS DETERMINAÇÕES DO MEIO NO DISCURSO GEOGRÁFICO

OpenAIRE

Geraldino, Carlos Francisco Gerencsez

2014-01-01

Este artigo visa contribuir para o debate sobre a construção epistemológica do conceito de meio na história da ciência geográfica. Para isso, apresenta um exame sintético das agregações de atributos ideados para esse conceito por Humboldt, Ritter, Ratzel, Vidal de La Blache, Demangeon e Sorre. Isso, no duplo intuito de, primeiro, demonstrar a manifesta continuidade teórica desses autores no tocante as suas acepções sobre as determinações mesológicas e, segundo, de argumentar contra a difundid...

Agrupamentos epistemológicos de artigos publicados sobre big data analytics

OpenAIRE

FURLAN, Patricia Kuzmenko; LAURINDO, Fernando José Barbin

2017-01-01

Resumo A era do big data já é realidade para empresas e indivíduos, e a literatura acadêmica sobre o tema tem crescido rapidamente nos últimos anos. Neste artigo, pretendeu-se identificar quais são os principais nichos e vertentes de publicação sobre o big data analytics. A opção metodológica foi realizar pesquisa bibliométrica na base de dados ISI Web of Science, utilizando-se aquele termo para focar as práticas de gestão de big data. Foi possível identificar cinco grupos distintos dentre os...

Números que pouco explicam: indicadores sobre famílias recasadas e bullying

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Leila Maria Torraca de Brito

2015-08-01

Full Text Available No presente artigo, optamos por analisar o recorte metodológico e algumas interpretações, divulgadas pelo Instituto Brasileiro de Geografia e Estatística, provenientes de indicadores obtidos sobre dois temas pesquisados pelo instituto. Nosso objetivo, portanto, foi o de avaliar metodologias e definições empregadas pelo Censo de 2010 na coleta de dados sobre famílias recasadas, bem como a opção metodológica e as acepções utilizadas para a apreensão do bullyingna pesquisa PeNSE, de 2009. Como os resultados das investigações empreendidas pelo instituto são usados para traçar o rumo das políticas públicas no Brasil, consideramos ser de suma importância que os procedimentos empregados estejam em consonância com as discussões teóricas atuais sobre os respectivos temas, situação que não foi evidenciada em nossa análise.

CONHECIMENTO DOS PROFESSORES SOBRE O MANEJO DA CRIANÇA COM DIABETES MELLITUS

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Ana Lúcia de Assis Simões

2010-01-01

Full Text Available Este estudio descriptivo de corte transversal tuvo como objetivo verificar el conocimiento sobre la diabetes mellitus y las dificultades encontradas por los profesores en el manejo de los niños diabéticos. El estudio se hizo con 184 profesores de educación preescolar en las escuelas municipales del municipio de Uberaba-MG, entre abril y julio de 2009. Los datos fueron recolectados a través de cuestionario y se analizaron mediante estadística descriptiva. Los resultados mostraron que los profesores entrevistados tienen conocimiento acerca de la diabetes (58,15%, sin embargo, mostraron desconocimiento sobre las manifestaciones clínicas (27,72%, los enfoques terapéuticos (33,70% y los principales procedimientos que se adoptarán en situaciones adversas (42,40%. Este estudio contribuyó a resaltar la necesidad de capacitar a los maestros sobre el tema de la diabetes mellitus de la primera infancia, para permitir el acercamiento al niño con conocimiento y seguridad.

Medición de la concentración de sedimentos en suspensión mediante dispositivos ópticos y acústicos: aplicación en sistemas tropicales (Delta del río Mira, Colombia Measurement of suspended sediment concentration using optical and acoustic devices: application in tropical systems (Mira River Delta, Colombia

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Juan Camilo Restrepo

2012-03-01

Full Text Available En los últimos años, la utilización de dispositivos ópticos (e.g. Optical Backscatter Sensor, OBS y acústicos (e.g. Acoustic Doppler Current Profiler-ADCP ha permitido monitorear con mayor resolución la variabilidad temporal y espacial de la concentración de sedimentos en suspensión (CSS en ambientes costeros y estuarinos. Sin embargo, la aplicación de estas técnicas en ambientes tropicales ha tenido un desarrollo incipiente. En el presente trabajo se implementó un procedimiento de calibración para un dispositivo OBS-3A, tomando como patrón de calibración sedimento seco y desagregado de la zona de estudio. Además, se presentan las correcciones a las que se debe someter la señal de respuesta del ADCP, debido a la dispersión geométrica, la atenuación del sonido por el agua y las partículas en suspensión, para que sea útil en la estimación de CSS. El ADCP y el OBS-3A se utilizaron para realizar mediciones de CSS en el sistema deltaico del río Mira (isla del Morro y desembocadura principal, ubicado sobre la costa del Pacífico colombiano, un ambiente costero tropical donde algunos factores oceanográficos y estuarinos son determinantes en la señal de respuesta de los equipos.In recent years, the use of optical (Optical Backscatter Sensor, OBS and acoustic (Acoustic Current Doppler Profiler, ADCP instruments has allowed monitoring the temporal and spatial variation of the suspended sediment concentration (SSC in coastal and estuarine environments with greater resolution. However, the development of the application of those techniques in tropical environments is incipient. For this study, an OBS-3A calibration procedure was implemented, taking dry and desegregated sediment from the study zone as a calibrating pattern. Moreover, we present the corrections required for the ADCP signal to be useful in the estimation of SSC due to geometrical spreading, the attenuation of sound by water, and the particles in suspension. The ADCP

Sobre nomes e coisas: Arnaldo Antunes em sala de aula

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Érica Dias Gomes

2016-12-01

Full Text Available A presente pesquisa teve como objetivo investigar sobre a compreensão de alunos de um curso de formação de docentes sobre as obras audiovisuais “Nome” e “Carnaval” de Arnaldo Antunes, pensando na forma com que percebem seu cotidiano e a sociedade atual por meio da interpretação. O questionamento que se faz é como, a partir da reflexão sobre as obras do artista, desenvolver um trabalho de sensibilização, investigação e criação em sala de aula. A pesquisa participante apresenta uma proposta pedagógica realizada com uma turma de estudantes do curso de formação de docentes do Colégio Estadual Visconde de Guarapuava, buscando desenvolver assim a expressividade e a formulação de ideias de forma conjunta, por meio do desenvolvimento de um processo criativo. Foram analisados os resultados das propostas realizadas em sala de aula, além dos registros em diário de campo. Por meio da pesquisa, percebeu-se a importância dos trabalhos que envolvam fruição, reflexão e produção como forma de apropriação dos conteúdos.

Sentidos sobre a Amizade Entre Travestis: Construção de Repertórios Interpretativos

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Rita Matins Godoy Rocha

Full Text Available RESUMOConsiderando a necessidade de outros olhares sobre a complexidade do universo das travestis, este estudo objetiva descrever e analisar os repertórios interpretativos sobre as relações de amizade entre elas. Participaram 10 travestis do sudeste brasileiro. A entrevista individual semiestruturada foi o recurso metodológico escolhido, apoiada pelo caderno de campo. O estudo se baseou nas propostas de análise do discurso construcionista social. Cinco repertórios interpretativos sobre amizade foram identificados: Babado; Batalha; Família; Segredo e Uó. O uso dos repertórios, em diferentes arranjos, apresenta a maneira como as travestis contam sobre si, seja ressaltando seus potenciais, seja legitimando sentidos de marginalidade e estigma. Esses sentidos criam a possibilidade de existência entre elas e podem subsidiar a construção e implementação de intervenções e políticas direcionadas a essa população.

Investigación etnográfica sobre experiencias de trabajo infantil en el noreste argentino

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Laura Frasco-Zuker

2016-01-01

Full Text Available El artículo tiene como objetivo caracterizar la infancia de quienes trabajan y/o trabajaron en contextos familiares en un barrio de una localidad de Misiones. Se parte de una concepción de la infancia como categoría socio‒histórica y se realiza una indagación antropológica en perspectiva del actor sobre experiencias de trabajo infantil en integrantes de tres unidades domésticas. El método de investigación es el trabajo de campo etnográfico. Los resultados preliminares muestran que las distintas trayectorias de trabajo en la infancia se vinculan a sentidos esperables en esta etapa de la vida que modelan prácticas específicas según generaciones, géneros e historias familiares. La articulación entre datos de campo y discusión teórica sobre trabajo infantil permite discutir nociones universales sobre las que se legisla y reflexionar sobre sus alcances y limitaciones.

Dos hipótesis sobre el presidencialismo autoritario

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Soledad Loaeza

2013-01-01

Full Text Available El presidencialismo autoritario mexicano ha sido objeto de muchas reflexiones y opiniones. No obstante, se ha impuesto un paradigma presidencialista que privilegia la perspectiva personalizada e idiosincrática del ejercicio del poder, con un importante componente cultu- ralista. Aquí se propone, por una parte, una perspectiva histórica que contextualiza las accio- nes presidenciales en el período 1944-1970; por la otra, se parte de dos presupuestos generales. Uno, sostiene que los presidentes mexicanos actuaban bajo importantes restricciones y según los ritmos de un proceso que avanzó en episodios, más que en forma lineal o acumulativa; el otro destaca la limitación geopolítica que se deriva de la vecindad con Estados Unidos que incidió sobre las acciones presidenciales, pero también sobre el desarrollo institucional del país. La evolución del presidencialismo autoritario lleva la huella de esta influencia. Este artículo introduce elementos para la discusión de las hipótesis. La primera parte hace una revisión crítica del paradigma presidencialista; la segunda expone las restricciones que se derivaban de la vecindad con Estados Unidos. La tercera y última está dedicada a la descripción del tipo de episodios que Pueden servir para ilustrar la evolución del presidencialismo autoritario. Las dos hipótesis que aquí se presentan han guiado una investigación más amplia sobre el impacto de la Guerra Fría en México y el desarrollo del presidencialismo.

Efecto cristal. Reflexiones sobre arquitectura

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Dr. Arq. Carlos Pantaleón Panaro

2017-12-01

Full Text Available ESPEJISMO es una ilusión óptica debido a la reflexión total de la luz cuando atraviesa capas de aire de densidad distinta, con lo cual los objetos lejanos dan una imagen invertida, como si se reflejaran sobre el agua, tal como ocurre en las llanuras de los desiertos. 1 La definición de espejismo nos explica que es una ilusión, una ficción, un desvarío, un delirio. Algo que no es real ni verdadero, la apariencia engañosa de algo que no existe. ¿Pero no existe, realmente? Tal vez se pueda decir, desde algún punto de vista, que una imagen ilusoria no es real. Pero ¿podríamos afirmarlo desde el punto de vista del fenómeno de la percepción? Si lo vemos, ¿no tendríamos derecho a decir que es real? ¿Algo tiene que ser material y poder tocarse, para ser real? ¿No basta simplemente con verlo? Este artículo de reflexión trata sobre el tema de lo ilusorio, de los espejismos y apariencias engañosas que, no obstante su naturaleza falaz, existen y se perciben, y son procesados por nuestra mente como fenómenos sensoriales que conforman nuestra percepción. El hilo conductor es un viaje a través de diferentes paisajes espejados: el del azar, el de las artes y el de la arquitectura. 1Diccionario de la Real Academia Española

Contribuição ao projeto de pontes estaiadas com estudo dos casos da ponte sobre o rio Pinheiros e a ponte sobre o rio Guama

OpenAIRE

Heitor Afonso Nogueira Neto

2003-01-01

Resumo: Segue uma pesquisa bibliográfica onde estão presentes a descrição histórica das construções das pontes suspensas, a análise das várias configurações geométricas adotadas na concepção de pontes estaiadas e um estudo sobre os estais. Este trabalho também contempla a descrição das duas mais importantes pontes estaiadas executadas no Brasil. A primeira refere-se a ponte metroviária sobre o rio Pinheiros (Ponte Engenheiro Jamil Sabino), na cidade de São Paulo, compondo a Linha 5 do metrô. ...

Efecto de distintos sistemas de acolchado del suelo sobre la humedad y la temperatura del suelo, y sobre distintos parámetros de nectarina regada por goteo

OpenAIRE

Zribi, Wided; Faci González, José María; Aragüés Lafarga, Ramón

2011-01-01

La agricultura de regadío moderna exige el uso óptimo y sostenible de los recursos agua y suelo. El acolchado del suelo puede ser una técnica eficiente de conservación de estos recursos. En particular, el acolchado en cultivos leñosos esta adquiriendo una importancia creciente por sus efectos hipotéticamente positivos sobre la conservación del agua y el control de la salinidad del suelo debidos a la reducción de la evaporación, así como sobre el rendimiento, precocidad de la cosecha y calidad...

SOBRE EL CONTROL EN SISTEMAS DINÁMICOS DE DIMENSIÓN INFINITA EN ESPACIOS DE HILBERT Y DE FRECHÉT

OpenAIRE

Nancy López-Reyes

2017-01-01

Se revisa el Control sobre sistemas dinámicos lineales de dimensión infnita que evolucionan en espacios con propiedades geométrico-algebraicas diferentes. En un caso, sobre espacios de Hilbert, los cuales poseen una rica estructura geométrico-algebraica, muy útil para el tratamiento del control, desde el punto de vista del enfoque dominio-frecuencia y del enfoque espacio-estado. En el otro caso, sobre espacios de Frechét, en particular sobre H(D), cuyas propiedades geométricas implican un tra...

Aprendiendo sobre el poder y la ciudadanía en un mundo virtual

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David Buckingham

2013-03-01

Full Text Available En este trabajo se presenta una investigación orientada a analizar cómo se desarrollan las relaciones de poder dentro de un mundo virtual dirigido al público infantil y adolescente (Habbo Hotel. Se pretendía llegar a comprender cómo estaba la compañía propietaria de ese espacio moderando, y por lo tanto ejerciendo su poder, a través de los diferentes actores encargados de tomar decisiones sobre el comportamiento de los usuarios dentro del mundo virtual. Al mismo tiempo, se profundizó en el tipo de lecciones que aprenden los usuarios sobre el ejercicio de la ciudadanía, derivadas de las normas de comportamiento impuestas por la compañía. Para comprender qué estaban aprendiendo los menores sobre el ejercicio del poder y sobre el prototipo de ciudadano modelo dentro del mundo virtual, analizamos los sistemas de reglas que regulan aquello que pueden o no hacer los usuarios y procedimos al análisis del contenido de espacios en los que los usuarios hablaban sobre los motivos por los que la compañía los había expulsado de «Habbo Hotel». Los resultados de este trabajo ponen de manifiesto que la aplicación del sistema de reglas por parte de la compañía hace que la experiencia dentro del mundo virtual no sea siempre lúdica, democrática, creativa, participativa o plenamente satisfactoria. Esto pone en entredicho algunos de los principales argumentos esgrimidos por diferentes autores en defensa de estos nuevos medios de comunicación.

NEAR-INFRARED VARIABILITY AMONG YOUNG STELLAR OBJECTS IN THE STAR FORMATION REGION CYGNUS OB7

Energy Technology Data Exchange (ETDEWEB)

Wolk, Scott J.; Rice, Thomas S. [Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138 (United States); Aspin, Colin [Institute for Astronomy, University of Hawaii at Manoa, 640 North Aohoku Place, Hilo, HI 96720 (United States)

2013-08-20

We present an analysis of near-infrared time-series photometry in J, H, and K bands for about 100 epochs of a 1 Degree-Sign Multiplication-Sign 1 Degree-Sign region of the Lynds 1003/1004 dark cloud in the Cygnus OB7 region. Augmented by data from the Wide-field Infrared Survey Explorer, we identify 96 candidate disk bearing young stellar objects (YSOs) in the region. Of these, 30 are clearly Class I or earlier. Using the Wide-Field Imaging Camera on the United Kingdom Infrared Telescope, we were able to obtain photometry over three observing seasons, with photometric uncertainty better than 0.05 mag down to J Almost-Equal-To 17. We study detailed light curves and color trajectories of {approx}50 of the YSOs in the monitored field. We investigate the variability and periodicity of the YSOs and find the data are consistent with all YSOs being variable in these wavelengths on timescales of a few years. We divide the variability into four observational classes: (1) stars with periodic variability stable over long timescales, (2) variables which exhibit short-lived cyclic behavior, (3) long-duration variables, and (4) stochastic variables. Some YSO variability defies simple classification. We can explain much of the observed variability as being due to dynamic and rotational changes in the disk, including an asymmetric or changing blocking fraction, changes to the inner disk hole size, as well as changes to the accretion rate. Overall, we find that the Class I:Class II ratio of the cluster is consistent with an age of <1 Myr, with at least one individual, wildly varying source {approx}100, 000 yr old. We have also discovered a Class II eclipsing binary system with a period of 17.87 days.

RPA-1 from Leishmania amazonensis (LaRPA-1) structurally differs from other eukaryote RPA-1 and interacts with telomeric DNA via its N-terminal OB-fold domain.

Science.gov (United States)

Pavani, R S; Fernandes, C; Perez, A M; Vasconcelos, E J R; Siqueira-Neto, J L; Fontes, M R; Cano, M I N

2014-12-20

Replication protein A-1 (RPA-1) is a single-stranded DNA-binding protein involved in DNA metabolism. We previously demonstrated the interaction between LaRPA-1 and telomeric DNA. Here, we expressed and purified truncated mutants of LaRPA-1 and used circular dichroism measurements and molecular dynamics simulations to demonstrate that the tertiary structure of LaRPA-1 differs from human and yeast RPA-1. LaRPA-1 interacts with telomeric ssDNA via its N-terminal OB-fold domain, whereas RPA from higher eukaryotes show different binding modes to ssDNA. Our results show that LaRPA-1 is evolutionary distinct from other RPA-1 proteins and can potentially be used for targeting trypanosomatid telomeres. Copyright © 2014 Federation of European Biochemical Societies. Published by Elsevier B.V. All rights reserved.

Sistema de creencias sobre las matemáticas en alumnos de secundaria

OpenAIRE

Williams, León C.; Gómez Chacón, Inés María

2007-01-01

En este artículo se describen la estructura y la naturaleza de los sistemas de creencias de un grupo de estudiantes de Secundaria en España y en Bélgica (Flandes) elicitadas a través de un cuestionario diseñado para este fin desde un enfoque sistémico. El cuestionario Mathematics-Related Beliefs Questionnaire (MRBQ) mide cuatro dimensiones de sistema de creencias en matemáticas: creencias sobre el papel y el funcionamiento del profesor, creencias sobre el significado y la competen...

A Influência do Patrocínio Esportivo na Atitude sobre Marcas

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Carlos Eugênio Zardini Filho

2017-01-01

Segundo Mason (2005), o patrocínio esportivo se caracteriza por aumentar a frequência de exposição das mensagens de marketing e tem grande impacto sobre a atitude do consumidor. Este projeto tem como objetivo identificar se o patrocínio esportivo é capaz de modificar favoravelmente o aspecto afetivo da atitude em relação a uma marca, mesmo a partir de um cenário negativo sobre tal marca. Quanto ao método, utilizou-se um mode...

Consideraciones transnacionales sobre la gestión del Programa Bracero, 1946-1952

OpenAIRE

Vézina, Catherine

2016-01-01

Resumen: Los estudios realizados sobre los debates políticos y regionales sobre el tema de la migración laboral mexicana y que explican las razones del mantenimiento del programa bracero se enfocan mayoritariamente en la gestión estadounidense del flujo migratorio. Este artículo se interesa en la dinámica global de las negociaciones que tuvieron lugar entre 1947 y 1952 y ofrece una historia integrada del programa bracero. Reconstruye diversas narrativas y, de acuerdo con el enfoque propuesto ...

Construcionismo social e metapsicologia: um diálogo sobre o conceito de self

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Carla Guanaes

Full Text Available O conceito de self tem sido central nas teorias da psicologia clínica, sendo difícil encontrar, neste campo, estudos que prescindam desta noção. Contudo, alguns teóricos têm questionado concepções mais conhecidas de self, apontando seu caráter construído e situado. Neste artigo, apresentamos o modo como o self tem sido descrito em algumas propostas psicanalíticas e construcionistas sociais, visando a construção de algumas diferenças entre elas. Buscamos, assim, favorecer uma aproximação de estudiosos da área clínica com o construcionismo social, entendendo que esta abordagem favorece uma reflexão sobre o próprio processo de produção de conhecimento sobre o mundo e sobre o self.

Conceitos de mulheres sobre sua menstruação

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Márcia Yuri Shinohara

1994-06-01

Full Text Available Dando prosseguimento às pesquisas anteriores realizadas pelo Núcleo de Assistência para o Autocuidado da Mulher (NAAM sobre aspectos relativos à menstruação, desenvolvemos um trabalho que estudou os conceitos de 705 mulheres sobre sua menstruação. Foram utilizadas informações do banco de dados do NAAM, obtidos na aplicação do Histórico de Saúde da Mulher no Município de Vargem Grande Paulista. O conceito mais relatado pelas mulheres foi o Normal. Isto talvez explique os dados obtidos em trabalhos anteriores, onde muitas mulheres nada fazem para aliviar os sintomas dolorosos da menstruação. O acesso a estes conceitos próprios é importante para elaborar uma assistência de enfermagem de qualidade respeitando as crenças e valores dentro da cultura das mulheres.

Concepções sobre criminalidade e modelos de policiamento

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Marco Antônio de Azevedo

Full Text Available Podem-se conceber duas perspectivas teóricas básicas para explicar a criminalidade: a culturalista e a racionalista. Da primeira derivam políticas públicas destinadas a reduzir a criminalidade através de uma atuação sobre a desorganização social. Na segunda privilegia-se uma estratégia segundo a qual o principal papel do Estado é dissuadir o criminoso da prática delituosa. Este trabalho revisa a literatura, evidenciando mitos sobre o crime e a atividade policial. São discutidos dois modelos de policiamento: um mais tradicional e reativo e outro mais preventivo, procurando-se mostrar que o racionalismo dá maior suporte teórico a políticas de segurança pública que valorizam a promoção da cidadania.

Mesa redonda sobre nuevos modelos organizativos en la gestión de proyectos digitales

OpenAIRE

Taladriz Mas, Margarita; Magriñá Contreras, Marta; Martín Marichal, Carmen; Cabo Rigol, Mercé; X Workshop Rebiun sobre proyectos digitales. Valencia, 7-8 Octubre de 2010

2010-01-01

Mesa redonda dentro del X Workshop Rebiun sobre proyectos digitales, celebrado en Valencia, 7-8 Ocubre de 2010, sobre: Nuevos modelos organizativos en la gestión de proyectos digitales. Moderador: José Manuel Barrueco (UV). Intervienen: Margarita Taladriz Mas(UC3M), Marta Magriñá Contreras (UNIRIOJA), Carmen Martín Marichal (ULPGC) y Mercé Cabo Rigol (UPF).

Reinventar un héroe: narrativas sobre los soldados rasos de la Guerra de Corea

OpenAIRE

Quiroga Cubides, Sebastián

2013-01-01

Esta investigación se pregunta sobre las diferentes narrativas históricas que se han construido sobre la figura de los soldados rasos de la guerra de Corea, y por cómo ellos han generado estrategias en su relato que se ajustan a unos procesos históricos determinados.

Nuevo puente de La Barca sobre el río Ter

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Rodríguez-Borlado, Ramiro

1967-12-01

Full Text Available The new La Barca bridge, over the river Ter, is on the northern approach to Gerona, and carries the CN II road from Madrid to France, passing through Barcelona. It substitutes another bridge of the same name, which was inadequate for the heavy increase in traffic, during recent years. The bridge is 128 m long, consisting of two lateral spans, each 37 m long, and a central span of 54 m. The superstructure consists of ten hollow metal girders, of variable depth, arranged as three-part cantilevered structures. The lateral sections are cantilevered towards the centre, and the middle part of the span rests on their extremities. The girders support a reinforced concrete slab of 16 cm thickness and 14 m width: 8 m for the roadway, and 3 m for each of the sidewalks. The structure rests on two piles and two abutments of reinforced concrete, based on caisson foundations, except for one of the abutments, which is a reinforced concrete block. The project is completed by the approach roads and stonemasonry.El nuevo puente de La Barca, sobre el río Ter, está situado en el acceso norte a Gerona de la C. N. II de Madrid a Francia por Barcelona. Sustituye a otro del mismo nombre que resultaba insuficiente para la elevada intensidad de tráfico de esta vía. La luz del puente es de 128 m, dividida en dos tramos laterales, de 37 m de luz, y un tramo central, de 54 m. La superestructura está constituida por cinco vigas metálicas, huecas, de canto variable, dispuestas como vigas cantilever de tres elementos. Los elementos laterales se prolongan hacia el centro en voladizo, apoyándose sobre ellos el elemento central. Las vigas soportan una losa de hormigón armado de 16 cm de espesor, y 14 m de anchura: 8 m para la calzada y 3 m para cada uno de los andenes laterales. El conjunto se apoya sobre dos pilas y dos estribos, de hormigón armado, cimentados sobre cajones indios, excepto uno de los estribos, que está cimentado sobre macizo de hormigón armado

Considerações sobre cuidado paliativo e trabalho hospitalar: uma abordagem plural sobre o processo de trabalho de enfermagem

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Miguel de Simoni

2003-01-01

Full Text Available O objetivo deste artigo é apresentar o esforço de síntese dos autores sobre material de pesquisa em cuidados paliativos e bibliografia estudada. Inicialmente, apresentamos algumas considerações sobre cuidado paliativo em dois países estruturalmente distintos, Brasil e França. A discussão está centrada nas experiências de pesquisa dos autores em um serviço de AIDS no Brasil e em um serviço de Medicina Interna na França, que adotava a lógica dos cuidados paliativos e abrigava predominantemente pacientes com AIDS e câncer. Abordamos, em seguida, aspectos referidos à dor e à morte, considerando conceitos da Bioética e a dimensão relacional do cuidado em saúde. Os conceitos assinalados são os de justiça, autonomia, beneficência e não-maleficência. Concluímos, apresentando algumas possíveis contribuições da Ergonomia e da Psicodinâmica do Trabalho na área de Cuidados Paliativos, considerando especialmente a dimensão psicológica deste debate.

Conocimientos, practicas y habilidades sobre la búsqueda bibliográfica y percepción estudiantil sobre la capacitación universitaria en investigación, en estudiantes de obstetricia

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Mauro Huamani-Navarro

Full Text Available Introducción: Se observan estudiantes del pregrado de obstetricia con insuficientes habilidades para utilizar toda la información que necesitan. Por ello, nos proponemos determinar el nivel de conocimiento, las prácticas y habilidades sobre la búsqueda de información en Internet, además de la percepción estudiantil sobre la capacitación brindada por la universidad y sobre su nivel en investigación. Sujetos y métodos: Estudio descriptivo transversal, periodo abril-julio de 2009, en 150 estudiantes de obstetricia de la Facultad de Medicina de la Universidad Nacional Mayor de San Marcos, en Perú. Por medio de un cuestionario estructurado, se realizó un análisis univariado. Resultados: El 78,7% presentó conocimientos bajos; el 55,3%, prácticas incorrectas, y el 74,7%, deficientes habilidades para realizar una búsqueda. El 60% consideraba que la preparación en búsqueda de información era regular o deficiente, con igual proporción para los procesos de publicación, redacción, lectura crítica y metodología de la investigación. Conclusiones: Identificar los conocimientos, prácticas, habilidades y percepciones sobre la investigación es importante para promover programas de capacitación extracurricular en los estudiantes durante el pregrado.

La educación escolar sobre drogas en España

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Amando VEGA FUENTE

2009-11-01

Full Text Available La educación sobre drogas en la escuela constituye hoy un elemento imprescindible en cualquier plan de actuación ante la problemática de las drogas. Por una parte, la escuela es la institución educativa por excelencia, a quien se le confía el cuidado educativo de niños y adolescentes al mismo tiempo que les prepara para la vida. Por otra parte, el consumo de drogas se extiende a las edades escolares, en principio a nivel experimental, aunque no faltan casos de abuso tanto de drogas legales como de ilegales. Esta ponencia pretende ser una aproximación al tema de la educación escolar sobre las drogas en España, entendida esta educación como una atención específica a esta problemática, aunque no se hable directamente de drogas. Aparece, por supuesto, un proceso histórico con aportaciones de interés, que no conviene olvidar para una mejor comprensión de la situación actual. Existen, por otra parte, abundantes estudios sobre el consumo de drogas en edades escolares de áreas locales y niveles de enseñanza restringidos, que nos dan una idea aproximada sobre la incidencia del problema entre los escolares. Son aspectos que no se pueden dejar de lado, si se pretende hacer un análisis crítico profundo y exacto, que nos ofrezca no sólo las limitaciones encontradas sino también pistas de las posibles respuestas a dar en el futuro.

Observaciones sobre algunos comportamientos de Trigona (Tetragonisca angustula. Iliiger (Hym. Apidae.

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Morales Soto Gilberto

1999-12-01

Full Text Available Las abejas sin aguijón del género Trigona constituyen uno de los grupos de insectos más amplios v diversos de la región tropical. Aunque su origen parece haber sido África, su mayor especiación ocurrió en el Trópico Americano, con cerca de 300 especies. En la región Neotropical, estas abejas son el grupo más importante de polinizadores de muchas plantas ornamentales, frutales y maderables. La interdependencia entre dichas plantas y las abejas, es en muchos casos altamente compleja y la ruptura de esa estrecha asociación por la intervención errónea del hombre, podría implicar la desaparición de unas otras respectivamente. Existen estudios sobre los hábitos de nidifación y arquitectura de los nidos de las trigonas y se posee conocimientos al respecto sobre la especia Trigona (Tetragonisca angustula Illiger. Sin embargo, los trabajos sobre comportamiento e importancia económica de este grupo de insectos son muy escasos y en el medio prácticamente inexistentes.

SPITZER SPECTROSCOPY OF CIRCUMSTELLAR DISKS IN THE 5 Myr OLD UPPER SCORPIUS OB ASSOCIATION

International Nuclear Information System (INIS)

Dahm, S. E.; Carpenter, John M.

2009-01-01

We present mid-infrared spectra between 5.2 and 38 μm for 26 disk-bearing members of the ∼5 Myr old Upper Scorpius OB association obtained with the Infrared Spectrograph (IRS) onboard the Spitzer Space Telescope. We find clear evidence for changes in the spectral characteristics of dust emission between the early-type (B+A) and late-type (K+M) infrared excess stars. The early-type members exhibit featureless continuum excesses that become apparent redward of ∼8 μm. In contrast, 10 and 20 μm silicate features or polycyclic aromatic hydrocarbon emission are present in all but one of the late-type excess members of Upper Scorpius. The strength of silicate emission among late-type Upper Scorpius members is spectral-type dependent, with the most prominent features being associated with K5-M2-type stars. By fitting the spectral energy distributions (SED) of a representative sample of low-mass stars with accretion disk models, we find that the SEDs are consistent with models having inner disk radii ranging from ∼0.2 to 1.2 AU. Complementary high-resolution (R ∼ 33, 000) optical (λλ4800-9200) spectra for the Upper Scorpius excess stars were examined for signatures of gaseous accretion. Of the 35 infrared excess stars identified in Upper Scorpius, only seven (all late-type) exhibit definitive signatures of accretion. Mass-accretion rates for these stars were estimated to range from 10 -11 to 10 -8.9 M sun yr -1 . Compared to Class II sources in Taurus-Auriga, the disk population in Upper Scorpius exhibits reduced levels of near- and mid-infrared excess emission and an order of magnitude lower mass-accretion rates. These results suggest that the disk structure has changed significantly over the 2-4 Myr in age separating these two stellar populations. The ubiquity of depleted inner disks in the Upper Scorpius excess sample implies that such disks are a common evolutionary pathway that persists for some time.

Opiniones y representaciones sociales de varones sobre aborto en Buenos Aires, Argentina

OpenAIRE

Petracci,Mónica

2011-01-01

Este artículo está basado en una investigación cualitativa cuyo objetivo fue explorar las opiniones de varones de 25 a 39 años de estratos socioeconómicos medios y populares, residentes en el Área Metropolitana de la Ciudad de Buenos Aires, Argentina (n: 30) acerca de la despenalización del aborto y sus representaciones sociales sobre el mismo. Los hallazgos han corroborado resultados previos y han aportado nuevos conocimientos. Se confirmó la ambivalencia de los discursos sobre el aborto, ya...

Efectos del comercio internacional sobre la distribución de la renta

OpenAIRE

Conde González, Noelia

2017-01-01

Desde el inicio del mercantilismo hasta nuestros días, ha existido controversia entre los defensores del libre comercio y los que se posicionan a favor del proteccionismo. El presente trabajo pretende esclarecer qué factores motivan el comercio internacional y para ello, se realiza una revisión de los modelos teóricos. Asimismo, se analiza de qué manera el comercio internacional incide sobre el crecimiento económico y sobre la distribución de la renta. Se hace especial hincapié en el teorema ...

Políticas sobre Sexualidad: Reportes desde las Líneas del Frente

OpenAIRE

Petchesky, Rosalind; Vianna, Adriana R. B.; Carrara, Sergio

2008-01-01

Políticas sobre sexualidad: reportes desde las líneas del frente, es un estudio comparativo de las políticas de sexualidad, la salud sexual y los derechos sexuales en ochos países y en dos instituciones mundiales. El trabajo contenido en Políticas sobre sexualidad ha sido desarrollado bajo el auspicio del Sexual Policy Watch [Observatorio de Políticas Sexuales] (SPW), un foro mundial compuesto por investigadores y activistas de una amplia gama de países y regiones del mundo. Inspirado en inic...

Implantación de switching y ToIP sobre una red WAN

OpenAIRE

Pique Palacin, Ivan

2013-01-01

Este proyecto tiene como objeto el diseño y la implementación de servicios de comunicaciones de LAN (Switching) y Telefonía IP (ToIP), todos ellos integrados sobre una red WAN nacional ya existente y funcionando, gestionada por un ISP. Aquest projecte té com a objecte el disseny i la implementació de serveis de comunicacions de LAN (Switching) i telefonia IP (ToIP), tots ells integrats sobre una xarxa WAN nacional ja existent i funcionant, gestionada per un ISP. Bachelor thesis for the ...

Visão panorâmica das pesquisas sobre texto no Brasil Visão panorâmica das pesquisas sobre texto no Brasil

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Ingedore G. Villaça Koch

2008-04-01

Full Text Available 0 despertar do interesse, no Brasil, pela abordagem lingilistica do texto - literario ou nio-literario - data do final da decada de 70. Para tanto, contribuiu, de forma significativa, a traducao para o portugues de duas obras sobre o assunto: SemiOtica narrativa e textual (Chabrol et al. 1977, coletanea de trabalhos mais voltados para o escudo da narrativa, entre os quais se podem citar urn do prOprio Chabrol "Alguns problemas de gramatica narrativa e textual" e outro de van Dijk "Gramaticas textuais e estruturas narrativas", este corn urn item sobre Textual (ainda bastante calcado na Gramatica Gerativa e na Semantica LOgica; e LingUtstica e teoria de texto (Schmidt 1978, em que se desenvolve a teoria dos "jogos de atuacio comunicativa", numa perspectiva predominantemente psicossocial.