5,735 research outputs found
Towards Parameterized Regular Type Inference Using Set Constraints
We propose a method for inferring \emph{parameterized regular types} for
logic programs as solutions for systems of constraints over sets of finite
ground Herbrand terms (set constraint systems). Such parameterized regular
types generalize \emph{parametric} regular types by extending the scope of the
parameters in the type definitions so that such parameters can relate the types
of different predicates. We propose a number of enhancements to the procedure
for solving the constraint systems that improve the precision of the type
descriptions inferred. The resulting algorithm, together with a procedure to
establish a set constraint system from a logic program, yields a program
analysis that infers tighter safe approximations of the success types of the
program than previous comparable work, offering a new and useful efficiency vs.
precision trade-off. This is supported by experimental results, which show the
feasibility of our analysis
Endoscopic diagnosis of gastric peptic ulcer penetrating into the liver
A 61-year-old man was admitted with upper gastrointestinal bleeding. Endoscopy showed a large gastric peptic ulcer with a pseudotumoral mass protruding from the ulcer bed. Histological examination of biopsies taken from the mass revealed distorted hepatic tissue and inflammatory changes. Hepatic penetration was diagnosed as the cause of bleeding. Surgery findings confirmed the endoscopic diagnosis
Condrosarcoma en pie
El condrosarcoma óseo en el pie es una lesión muy rara. Se presenta 1 caso de bajo
grado de malignidad histológico y primario en su origen, que afecta al primer radio, tratado
mediante resección amplia y sin signos de recidiva a los 3 años y medio de evolución.Bone chondrosarcoma very rarely affccts the foot. We report a case of primary
bone chondrosarcoma vvith low grade malignancy involving the first metatarsal bone. Tumor was
treated by wide resection. Three and half years later, there was not signs of recurrence
High-Temperature Superconducting Level Meter for Liquid Argon Detectors
Capacitive devices are customarily used as probes to measure the level of
noble liquids in detectors operated for neutrino studies and dark matter
searches. In this work we describe the use of a high-temperature
superconducting material as an alternative to control the level of a cryogenic
noble liquid. Lab measurements indicate that the superconductor shows a linear
behaviour, a high degree of stability and offers a very accurate determination
of the liquid volume. This device is therefore a competitive instrument and
shows several advantages over conventional level meters.Comment: 13 pages, 11 figures. Accepted for publication in JINS
Orientaciones de meta en las clases de educación física : un análisis centrado en la educación secundaria obligatoria
This paper explores the subject of motivation in educational environments, more specifically in physical education. The research study it describes is based on the concept of goal perspectives (Nicholls, 1984, Dweck and Legget, 1988, Ames, 1984, Duda, 1992), and the purpose of the study was to identify the (task or ego) goal orientations shown by secondary school students in physical education classes, together with any possible differences based either on gender or the academic stage in the students education. The sample was composed of 203 secondary school students who all answered the POSQ questionnaire. From the results that were obtained, both goal orientations were observed, with a task-basedorientation predominating. It was also shown that boys are more ego oriented than girls
Dishonest signals of strength in male slender crayfish (Cherax dispar) during agonistic encounters
Many animals resolve disputes without combat by displaying signals of potential strength during threatening displays. Presumably, competitors use each other's displays to assess their relative strengths, and current theory predicts that these signals of strength should generally be honest. We tested this prediction by investigating the relationships among morphology, performance, and social dom inance in males of the slender crayfish Cherax dispar. Crayfish routinely use their enlarged front claws (chelae) for both intimidation and fighting, making this species ideal for studying the honesty of weapon size. We evaluated five competing models relating morphological and physiological traits to dominance during paired competitive bouts. Based on the best model, larger chelae clearly resulted in greater dominance; however, chela strength had no bearing on dominance. Thus, displays of chela size were dishonest signals of strength, and the enlarged chelae of males seemingly function more for intimidation than for fighting. In addition, an analysis of the performance of isolated chela muscle showed that muscle from male crayfish produced only half the force that muscle from female crayfish produced (236.6 +/- 26.4 vs. 459.5 +/- 71.6 kN m(-2)), suggesting that males invest more in developing larger chelae than they do in producing high-quality chela muscle. From our studies of crayfish, we believe dishonest signaling could play a greater role in territorial disputes than previously imagined
Cloud Screening and Quality Control Algorithm for Star Photometer Data: Assessment with Lidar Measurements and with All-sky Images
This paper presents the development and set up of a cloud screening and data quality control algorithm for a star photometer based on CCD camera as detector. These algorithms are necessary for passive remote sensing techniques to retrieve the columnar aerosol optical depth, delta Ae(lambda), and precipitable water vapor content, W, at nighttime. This cloud screening procedure consists of calculating moving averages of delta Ae() and W under different time-windows combined with a procedure for detecting outliers. Additionally, to avoid undesirable Ae(lambda) and W fluctuations caused by the atmospheric turbulence, the data are averaged on 30 min. The algorithm is applied to the star photometer deployed in the city of Granada (37.16 N, 3.60 W, 680 ma.s.l.; South-East of Spain) for the measurements acquired between March 2007 and September 2009. The algorithm is evaluated with correlative measurements registered by a lidar system and also with all-sky images obtained at the sunset and sunrise of the previous and following days. Promising results are obtained detecting cloud-affected data. Additionally, the cloud screening algorithm has been evaluated under different aerosol conditions including Saharan dust intrusion, biomass burning and pollution events
Nonparametric analysis of casein complex genes' epistasis and their effects on phenotypic expression of milk yield and composition in Murciano-Granadina goats
Improving knowledge on the causative polymorphisms or genes regulating the expression of milk
quantitative and qualitative traits and their interconnections plays a major role in dairy goat breeding programs and genomic research. This information enables
optimization of predictive and selective tools, to obtain better-performing animals to help satisfy market
demands more efficiently. Goat milk casein proteins
(αS1, αS2, β, and κ) are encoded by 4 loci (CSN1S1,
CSN1S2, CSN2, and CSN3) clustered within 250 kb on
chromosome 6. Among the statistical methods used to
identify epistatic interactions in genome-wide qualitative association studies (GWAS), gene-based methods
have recently grown in popularity due to their better
statistical power and biological interpretability. However, most of these methods make strong assumptions
about the magnitude of the relationships between SNP
and phenotype, limiting statistical power. Thus, the
aims of this study were to quantify the epistatic relationships among 48 SNP in the casein complex on the
expression of milk yield and components (fat, protein,
dry matter, lactose, and somatic cells) in MurcianoGranadina goats, to explain the qualitative nature
of the SNP used to quantify the genotypes produced
as a result. Categorical principal component analysis
(CATPCA) was used to delimit and group the number
of SNP studied depending on their implications in the
explanation of milk yield and components variability.
Afterward, nonlinear canonical correlation analysis was
used to identify relationships among and within the
SNP groups detected by CATPCA. Our results suggest
that 79.65% of variability in the traits evaluated may
be ascribed to the epistatic relationships across and
within 7 SNP groups. Two partially overlapping groups
of epistatically interrelated SNP were detected: one
group of 21 SNP, explaining 57.56% of variability, and
another group of 20 SNP, explaining 42.43% (multiple
fit ≥ 0.1). Additionally, SNP18, 32, and 36 (CSN1S2,
CSN1S1, and CSN2 loci, respectively) were the most
significant SNP to explain intragroup epistatic variability (component loading > |0.5|). Conclusively, milk
yield and quality may not only depend on the specific
casein gene pool of individuals, but may also be relevantly conditioned by the relationships set across and
within such genes. Hence, studying epistasis in isolation may be crucial to optimize selective practices for
economically important dairy traits
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