cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Visual conflict and cognitive load modify postural responses to vibrotactile noise
Creators: name: (:Unkn) Unknown
Publisher: name: My University
Year: 2014
Subjects: Balance
Virtual reality
Stochastic resonance
Approximate entropy
Attention

description: Background: Underlying the increased incidence of falls during multitasking is a reduced ability to detect or attend to the sensory information signaling postural instability. Adding noise to a biological system has been shown to enhance the detection and transmission of weakened or sub-threshold cutaneous signals. If stochastic resonance is to become an effective adjunct to rehabilitation, we need to determine whether vibrotactile noise can be effective when added to an environment presenting with other sensory noise. Methods. Sub-threshold vibration noise was applied for 30 sec at the soles of the feet in 21 healthy adults (20-29 yrs) between two 30-sec periods of no vibration. During the trials, subjects stood quietly with eyes closed or while viewing a visual scene that rotated in continuous upward pitch at 30 deg/sec. Subjects were also tested with these two visual conditions while performing a mental calculation task. It was hypothesized that sub-threshold vibration would increase regularity of postural sway, thereby improving postural stabilization during an attention demanding task but exerting less effect with multiple sensory demands. An ellipse fit to the covariance matrix revealed excursion of center of pressure (COP) and center of mass (COM) responses in the anterior-posterior and lateral planes. RMS values and approximate entropy of the COP and COM were calculated and statistically compared. Results: The addition of vibrotactile noise to the plantar surface during quiet stance with eyes closed reduced the area of the COM and COP responses, which then returned to pre-vibration levels after vibration was removed. Postural sway was generally increased with both visual field rotations and mental calculation compared to the eyes closed condition. The effect of sub-threshold vibratory noise on postural behavior was modified when visual field rotations and mental calculation was combined. It was shown that the measure of approximate entropy reflected increased task complexity. Conclusions: Our results suggest that the impact of destabilizing signals is modulated when combined with vibrotactile stimulation. The strong aftereffects of the vibration stimulus suggest that the system has adapted to the sensory array even in the short time period tested here. The results imply that application of vibrotactile stimulation has the potential for diminishing sway magnitudes while increasing the potential for response variability, thereby presenting a non-invasive method of reducing the potential for falls. © 2014 Keshner et al.; licensee BioMed Central Ltd.
High serum miR-19a levels are associated with inflammatory breast cancer and are predictive of favorable clinical outcome in patients with metastatic HER2+ inflammatory breast cancer
Creators: name: (:Unkn) Unknown
Publisher: name: My University
Year: 2014
Subjects: Case-Control Studies
Cell Line, Tumor
Female
Gene Expression Regulation, Neoplastic
Humans
Inflammatory Breast Neoplasms
Kaplan-Meier Estimate
MicroRNAs
Middle Aged
Neoplasm Metastasis
Prognosis
Receptor, ErbB-2
Treatment Outcome

description: Introduction: Altered serum microRNA (miRNA) levels may be correlated with a dysregulated expression pattern in parental tumor tissue and reflect the clinical evolution of disease. The overexpression of miR-21, miR-10b, and miR-19a is associated with the acquisition of malignant characteristics (increased tumor cell proliferation, migration, invasion, dissemination, and metastasis); thus, we determined their utility as serum biomarkers for aggressive breast cancer (HER2-overexpressed or -amplified [HER2+] and inflammatory breast cancer [IBC]). Experimental Design: In this prospective study, we measured miR-21, miR-10b, and miR-19a levels using quantitative reverse transcriptase-polymerase chain reaction in the serum of 113 breast cancer patients and determined their association with clinicopathologic factors and clinical outcome. Thirty healthy donors with no history of cancer were enrolled as controls. Results: Patients with non-metastatic HER2+ breast cancer had higher serum miR-21 median levels than patients with nonmetastatic HER2- disease (p = 0.044); whereas patients with metastatic HER2+ breast cancer had higher serum miR-10b median levels than patients with metastatic HER2- disease (p = 0.0004). There were no significant differences in serum miR- 19a median levels between HER2+ and HER22 groups, regardless of the presence of metastases. High serum miR-19a levels were associated with IBC (p = 0.039). Patients with metastatic IBC had significantly higher serum miR-19a median levels than patients with metastatic non-IBC (p = 0.019). Finally, high serum miR-19a levels were associated with longer progression-free survival time (10.3 vs. 3.2 months; p = 0.022) and longer overall survival time (median not reached vs. 11.2 months; p = 0.003) in patients with metastatic HER2+ IBC. Conclusion: High levels of miR-21 and miR-10b were present in the serum of patients with non-metastatic and metastatic HER2+ breast cancer, respectively. High levels of serum miR-19a may represent a biomarker for IBC that is predictive for favorable clinical outcome in patients with metastatic HER2+ IBC. © 2014 Anfossi et al.
The generation and control of 1.5 megawatts of RF power for the TRIUMF cyclotron
Creators: name: Brackhaus, Karl Heinz
Publisher: name: University of British Columbia
Year: 2010

description: This thesis discusses the design of a stable, 1.5 MW, 23.075 MHz, RF system for the TRIDMF cyclotron. A physical description of this EF system; the RF amplifiers, transmission lines, and resonators, is provided. The required characteristics of this system are presented with emphasis on an examination of the amplitude and phase modulation constraints that was carried out as part of the course of study. It is shown that to satisfy the RF system criteria initially proposed, one must reduce RF system disturbances to an absolute minimum, and then further increase system stability by using amplitude and phase regulating feedback systems. A method for reducing one type of system disturbance— the use of dynamic vibration dampers for the resonator hot arm panels—was investigated. The analysis of dampers used for the elimination of vibrations caused by excitation at a single frequency is fairly well known; this thesis presents the method of analysis and design that was developed for systems excited by stochastic signals. To keep the power required by the resonators within the limits imposed by the RF amplifiers, the resonators must be kept closely tuned to the RF driving frequency. The analysis and design of a pneumatic tuning system to accomplish this function is presented. The design of RF feedback regulating systems .requires a knowledge of the response of RF systems to amplitude and phase modulation. Due to the stringent stability requirements imposed on the TRIUMF RF system, it was also considered imperitive to investigate the coupling between amplitude and phase in the same system. To this end, the generalized (matrix) transfer function of a modulated carrier system was derived. This function was then approximated to give the necessary amplitude, phase, and coupling transfer functions. Because it is intended to "square" the RF accelerating voltage waveform by introducing third harmonic power, another problem is introduced. This is, given that the phase relationship between the fundamental and third harmonic RF voltages is to be such that power is fed from the fundamental RF system into the circulating ion beam and from this beam into the third harmonic RF system, will this system be stable? To answer this question the relationships between the instantaneous circulating beam currant and the RF accelerating voltage were derived. The RF system (complete with feedback loops) was then digitally simulated to show that the system is, indeed, stable. The analysis of the required RF feedback loops is presented in this thesis. This analysis is followed by an investigation of the problems of measuring the RF waveform parameters. The design of the RF measurement system is discussed and measurement results are presented.
Three-dimensional mapping of mRNA export through the nuclear pore complex
Creators: name: (:Unkn) Unknown
Publisher: name: My University
Year: 2014
Subjects: super-resolution microscopy
single-particle tracking
mRNA
nuclear export
nuclear pore complex

description: © 2014 by the authors; licensee MDPI, Basel, Switzerland. The locations of transcription and translation of mRNA in eukaryotic cells are spatially separated by the nuclear envelope (NE). Plenty of nuclear pore complexes (NPCs) embedded in the NE function as the major gateway for the export of transcribed mRNAs from the nucleus to the cytoplasm. Whereas the NPC, perhaps one of the largest protein complexes, provides a relatively large channel for macromolecules to selectively pass through it in inherently three-dimensional (3D) movements, this channel is nonetheless below the diffraction limit of conventional light microscopy. A full understanding of the mRNA export mechanism urgently requires real-time mapping of the 3D dynamics of mRNA in the NPC of live cells with innovative imaging techniques breaking the diffraction limit of conventional light microscopy. Recently, super-resolution fluorescence microscopy and single-particle tracking (SPT) techniques have been applied to the study of nuclear export of mRNA in live cells. In this review, we emphasize the necessity of 3D mapping techniques in the study of mRNA export, briefly summarize the feasibility of current 3D imaging approaches, and highlight the new features of mRNA nuclear export elucidated with a newly developed 3D imaging approach combining SPT-based super-resolution imaging and 2D-to-3D deconvolution algorithms.
VERTICO: The Virgo Environment Traced In CO Survey
Creators: name: Brown, Toby
name: Wilson, Christine D.
name: Zabel, Nikki
name: Davis, Timothy A.
name: Boselli, Alessandro
name: Chung, Aeree
name: Ellison, Sara L.
name: Lagos, Claudia D. P.
name: Stevens, Adam R. H.
name: Cortese, Luca
name: Bahé, Yannick M.
name: Bisaria, Dhruv
name: Bolatto, Alberto D.
name: Cashmore, Claire R.
name: Catinella, Barbara
name: Chown, Ryan
name: Diemer, Benedikt
name: Elahi, Pascal J.
name: Hani, Maan H.
name: Jiménez-Donaire, María J.
name: Lee, Bumhyun
name: Leidig, Katya
name: Mok, Angus
name: Olsen, Karen Pardos
name: Parker, Laura C.
name: Roberts, Ian D.
name: Smith, Rory
name: Spekkens, Kristine
name: Thorp, Mallory
name: Tonnesen, Stephanie
name: Vienneau, Evan
name: Villanueva, Vicente
name: Vogel, Stuart N.
name: Wadsley, James
name: Welker, Charlotte
name: Yoon, Hyein
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present the Virgo Environment Traced in CO (VERTICO) survey, a new effort to map $^{12}$CO($2-1$), $^{13}$CO($2-1$), and C$^{18}$O($2-1$) in 51 Virgo Cluster galaxies with the Atacama Compact Array, part of the Atacama Large Millimeter/submillimeter Array (ALMA). The primary motivation of VERTICO is to understand the physical mechanisms that perturb molecular gas disks, and therefore star formation and galaxy evolution, in dense environments. This first paper contains an overview of VERTICO's design and sample selection, $^{12}$CO($2-1$) observations, and data reduction procedures. We characterize global $^{12}$CO($2-1$) fluxes and molecular gas masses for the 49 detected VERTICO galaxies, provide upper limits for the two non-detections, and produce resolved $^{12}$CO($2-1$) data products (median resolution $= 8^{\prime\prime} \approx 640~{\rm pc}$). Azimuthally averaged $^{12}$CO($2-1$) radial intensity profiles are presented along with derived molecular gas radii. We demonstrate the scientific power of VERTICO by comparing the molecular gas size--mass scaling relation for our galaxies with a control sample of field galaxies, highlighting the strong effect that radius definition has on this correlation. We discuss the drivers of the form and scatter in the size--mass relation and highlight areas for future work. VERTICO is an ideal resource for studying the fate of molecular gas in cluster galaxies and the physics of environment-driven processes that perturb the star formation cycle. Upon public release, the survey will provide a homogeneous legacy dataset for studying galaxy evolution in our closest cluster.
description: 68 pages, 13 Figures, 2 Figure Sets, Accepted for publication in ApJS, Online FITS versions of Tables 1, 2, and 3 are available with the journal publication
Additional file 6 of Differential expression of gluconeogenic enzymes in early- and late-stage diabetes: the effect of Citrullus colocynthis (L.) Schrad. Seed extract on hyperglycemia and hyperlipidemia in Wistar-Albino rats model
Creators: name: Afshari, Arezoo
name: Salimi, Fouzieh
name: Nowrouzi, Azin
name: Khalili, Masoumeh Babaie
name: Bakhtiyari, Salar
name: Hassanzadeh, Gholamreza
name: Shabani, Maryam
name: Ahadi, Ali
name: Farhadiannezhad, Masoumeh
Publisher: name: figshare
Year: 2021
Subjects: subject: Biochemistry
subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Physiology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: 69999 Biological Sciences not elsewhere classified
subject: Developmental Biology
subject: Inorganic Chemistry

description: Additional file 6. Fig. S6. HPLC-MS analysis (A) HPLC chromatogram; (B) TIC; and (C) full scan mass spectra
Tcr triggering by pMHC ligands tethered on surfaces via poly(ethylene glycol) depends on polymer length
Creators: name: (:Unkn) Unknown
Publisher: name: My University
Year: 2014
Subjects: Animals
Histocompatibility Antigens
Ligands
Mice
Molecular Dynamics Simulation
Molecular Weight
Peptides
Polyethylene Glycols
Receptors, Antigen, T-Cell
Surface Properties

description: © 2014 Ma et al. Antigen recognition by T cells relies on the interaction between T cell receptor (TCR) and peptide-major histocompatibility complex (pMHC) at the interface between the T cell and the antigen presenting cell (APC). The pMHC-TCR interaction is two-dimensional (2D), in that both the ligand and receptor are membrane-anchored and their movement is limited to 2D diffusion. The 2D nature of the interaction is critical for the ability of pMHC ligands to trigger TCR. The exact properties of the 2D pMHC-TCR interaction that enable TCR triggering, however, are not fully understood. Here, we altered the 2D pMHCTCR interaction by tethering pMHC ligands to a rigid plastic surface with flexible poly(ethylene glycol) (PEG) polymers of different lengths, thereby gradually increasing the ligands' range of motion in the third dimension. We found that pMHC ligands tethered by PEG linkers with long contour length were capable of activating T cells. Shorter PEG linkers, however, triggered TCR more efficiently. Molecular dynamics simulation suggested that shorter PEGs exhibit faster TCR binding onrates and off-rates. Our findings indicate that TCR signaling can be triggered by surface-tethered pMHC ligands within a defined 3D range of motion, and that fast binding rates lead to higher TCR triggering efficiency. These observations are consistent with a model of TCR triggering that incorporates the dynamic interaction between T cell and antigen-presenting cell.
Supplementary Materials.docx
Creators: name: Asad, Nada
Publisher: name: figshare
Year: 2024
Subjects: classificationCode: 520505
subject: Social psychology
classificationCode: 320221
subject: Psychiatry (incl. psychotherapy)
classificationCode: 520303
subject: Counselling psychology

description: Psychological Trauma is “a circumstance in which an event overwhelms or exceeds a person’s capacity to protect his or her psychic wellbeing and integrity.” The purpose of this study is to know the relationship between ACEs (Adverse Childhood Experiences) and the type of trauma. The researcher collected the interviews, familiarised, coded, generated, reviewed, defined, named themes, and wrote them up. The databases used were Library Plus, Google Scholar, Psych Info, the British Journal of Psychology. The keywords were ‘Trauma’, ‘childhood trauma’, ‘integrative psychotherapy’, and ‘childhood adverse experiences’. To guarantee the rigour of the literature review process, the following steps were used: Identification of the articles through the databases, screening of the titles and abstracts for articles relevant to the research question, and assessment of the articles’ eligibility. Results highlight the importance of the psychotherapist’s personal therapy in dealing with trauma work. Some areas require further investigation, such as the relation of specific types of traumas to ACEs and the factors that help people resist the appearance of ACEs. Environment, job, socioeconomic factors, support from a relative or therapist, education level, and birth order in the family in relation to the appearance of ACEs.
Accelerated diversification of nonhuman primate malarias in Southeast Asia: Adaptive radiation or geographic speciation?
Creators: name: (:Unkn) Unknown
Publisher: name: My University
Year: 2015
Subjects: host range
macaques
malaria
orangutan
parasite speciation
phylogeny Plasmodium
population structure

description: © The Author 2014. Published by Oxford University Press on behalf of the Society for Molecular Biology and Evolution. Although parasitic organisms are found worldwide, the relative importance of host specificity and geographic isolation for parasite speciation has been explored in only a few systems. Here, we study Plasmodium parasites known to infect Asian nonhuman primates, a monophyletic group that includes the lineage leading to the human parasite Plasmodium vivax and several species used as laboratory models in malaria research. We analyze the available data together with new samples from three sympatric primate species from Borneo: The Bornean orangutan and the long-tailed and the pig-tailed macaques. We find several species of malaria parasites, including three putatively new species in this biodiversity hotspot. Among those newly discovered lineages, we report two sympatric parasites in orangutans. We find no differences in the sets of malaria species infecting each macaque species indicating that these species show no host specificity. Finally, phylogenetic analysis of these data suggests that the malaria parasites infecting Southeast Asian macaques and their relatives are speciating three to four times more rapidly than those with other mammalian hosts such as lemurs and African apes. We estimate that these events took place in approximately a 3-4-Ma period. Based on the genetic and phenotypic diversity of the macaque malarias, we hypothesize that the diversification of this group of parasites has been facilitated by the diversity, geographic distributions, and demographic histories of their primate hosts.
Astroparticle physics with nuclear track detectors
Creators: name: Medinaceli Villegas, Eduardo <1976>
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2008
Subjects: FIS/01 Fisica sperimentale

description: This thesis is mainly about the search for exotic heavy particles -Intermediate
Mass Magnetic Monopoles, Nuclearites and Q-balls with the SLIM experiment
at the Chacaltaya High Altitude Laboratory (5230 m, Bolivia), establishing
upper limits (90% CL) in the absence of candidates, which are among the best
if not the only one for all three kind of particles. A preliminary study of the
background induced by cosmic neutron in CR39 at the SLIM site, using Monte
Carlo simulations.
The measurement of the elemental abundance of the primary cosmic ray
with the CAKE experiment on board of a stratospherical balloon; the charge
distribution obtained spans in the range 5≤Z≤31.
Both experiments were based on the use of plastic Nuclear Track Detectors,
which records the passage of ionizing particles; by using some chemical reagents
such passage can be make visible at optical microscopes.
Influenza della variabilità spaziale sul trasporto reattivo
Influence de la variabilité spatiale sur le transport réactif
Creators: name: De Lucia, Marco <1977>
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2008
Subjects: ING-IND/28 Ingegneria e sicurezza degli scavi

description: La tesi ha per obiettivo di quantificare gli effetti che la variabilità spaziale del mezzo poroso ha
sull'evoluzione di un sistema geochimico. Le reazioni di dissoluzione o precipiazione di minerali
modificano la struttura microscopica del mezzo, e con essa le proprietà idrodinamiche del sistema,
la permeabilità in modo particolare. La variabilità spaziale iniziale del mezzo può essere causa
della formazione di digitazioni o canalizzazioni?
La prima parte della tesi tratta il cambiamento di scala, necessario per passare da una
simulazione geostatistica su griglia fine al calcolo di trasporto su una tessellazione più grossolana.
Nel caso del codice di calcolo Hytec, che implementa uno schema ai volumi finiti basato su
discretizzazione in poligoni di Voronoï, sono stati confrontati diversi metodi di calcolo della
permeabilità equivalente, seguendo differenti criteri.
La seconda parte riguarda i calcoli di trasporto reattivo condotti su famiglie di simulazioni
geostatistiche del mezzo; l'influenza della variabilità spaziale iniziale sull'evoluzione dei sistemi
viene quantificata grazie ad opportune grandezze osservabili. Sono state studiate due reazioni
distinte: un caso di dissoluzione, in maniera più approfondita, e più rapidamente un caso di
precipitazione, il cui effetto complessivo è quello di riequilibrare il sistema.
description: La thèse vise à quantifier les effets de la variabilité spatiale d'un milieux poreux sur l'évolution
d'un système géochimique. Les réactions de dissolution ou de précipitation des minéraux
modifient la structure microscopique du milieu, et par suite les caractéristiques hydrodynamiques
du système, notamment la perméabilité. La variabilité spatiale du milieu initial peut-elle alors
être à l'origine de la formation de digitations ou de chenaux?
La première partie traite du changement d'échelle, pour le passage d'une simulation géostatistique
sur grille fine au calcul de transport sur un maillage plus grossier. Dans le cas du code
Hytec, qui utilise un schéma aux volumes finis fondé sur une discrétisation en polygones de
Voronoï, plusieurs méthodes de calcul de la perméabilité équivalente sont comparées, suivant
différents critères.
La deuxième partie aborde les calculs de transport réactif sur une famille de simulations
géostatistiques du milieu. L'influence de la variabilité spatiale initiale sur l'évolution des systèmes
est quantifiée à l'aide de “observables” convenables. Deux réactions distinctes sont étudiées, un
cas de dissolution, de façon approfondie, et, plus rapidement, un cas de précipitation tendant
au rééquilibrage du système.
Thermalization and temperature distribution in a driven ion chain
Creators: name: Lin, G. -D.
name: Duan, L. -M.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We study thermalization and non-equilibrium dynamics in a dissipative quantum many-body system -- a chain of ions with two points of the chain driven by thermal bath under different temperature. Instead of a simple linear temperature gradient as one expects from the classical heat diffusion process, the temperature distribution in the ion chain shows surprisingly rich patterns, which depend on the ion coupling rate to the bath, the location of the driven ions, and the dissipation rates of the other ions in the chain. Through simulation of the temperature evolution, we show that these unusual temperature distribution patterns in the ion chain can be quantitatively tested in experiments within a realistic time scale.
description: 5 pages, 5 figures
Euler's fluid equations: Optimal Control vs Optimization
Creators: name: Holm, Darryl D.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: An optimization method used in image-processing (metamorphosis) is found to imply Euler's equations for incompressible flow of an inviscid fluid, without requiring that the Lagrangian particle labels exactly follow the flow lines of the Eulerian velocity vector field. Thus, an optimal control problem and an optimization problem for incompressible ideal fluid flow both yield the \emph {same} Euler fluid equations, although their Lagrangian parcel dynamics are \emph{different}. This is a result of the \emph{gauge freedom} in the definition of the fluid pressure for an incompressible flow, in combination with the symmetry of fluid dynamics under relabeling of their Lagrangian coordinates. Similar ideas are also illustrated for SO(N) rigid body motion.
description: 12 pages
Computing inclusions of Schur modules
Creators: name: Sam, Steven V
Publisher: name: arXiv
Year: 2008
Subjects: subject: Commutative Algebra (math.AC)
subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 13P99, 15A69, 13D02

description: We describe a software package for constructing minimal free resolutions of GL_n(Q)-equivariant graded modules M over Q[x_1, ..., x_n] such that for all i, the ith syzygy module of M is generated in a single degree. We do so by describing some algorithms for manipulating polynomial representations of the general linear group GL_n(Q) following ideas of Olver and Eisenbud-Floystad-Weyman.
description: 7 pages, no figures. v2: updated with examples of code use. Package may be downloaded here: http://math.mit.edu/~ssam/PieriMaps.m2
Online-offline activities and game-playing behaviors of avatars in a massive multiplayer online role-playing game
Creators: name: Jiang, Zhi-Qiang
name: Zhou, Wei-Xing
name: Tan, Qun-Zhao
Publisher: name: arXiv
Year: 2009
Subjects: subject: Popular Physics (physics.pop-ph)
subject: Multiagent Systems (cs.MA)
subject: Physics and Society (physics.soc-ph)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: Massive multiplayer online role-playing games (MMORPGs) are very popular in China, which provides a potential platform for scientific research. We study the online-offline activities of avatars in an MMORPG to understand their game-playing behavior. The statistical analysis unveils that the active avatars can be classified into three types. The avatars of the first type are owned by game cheaters who go online and offline in preset time intervals with the online duration distributions dominated by pulses. The second type of avatars is characterized by a Weibull distribution in the online durations, which is confirmed by statistical tests. The distributions of online durations of the remaining individual avatars differ from the above two types and cannot be described by a simple form. These findings have potential applications in the game industry.
description: 6 EPL pages including 10 eps figures
title: Muestro de Venas Suprarrenales en el Hiperaldosteronismo Primario
Creators: name: Zevallos Maldonado, Carmen
Publisher: name: Sociedad Española de Radiología Médica
Year: 2014
Subjects: subject: Interventional vascular
subject: Fluoroscopy
subject: Catheter venography
subject: Catheters
subject: Sampling
subject: Hypertension

description: Objetivo docente
Revisión del tema
Conclusiones
Bibliografía
description: Objetivo docente:
Describir la técnica del muestreo de las venas suprarrenales de nuestro servicio,
y su rol en el diagnostico etiológico del Hiperaldosteronismo...
Longitudinal nuclear spin relaxation in ³HE gas at low temperatures
Creators: name: Chapman, Ross
Publisher: name: University of British Columbia
Year: 2010

description: The first measurements of the temperature dependence of the intrinsic dipolar relaxation time T[sub 1B] due to binary collisions in dilute ³HE gas are reported. Sufficiently pure experimental conditions to observe T[sub 1B] were prepared by coating bare pyrex sample cells with clean neon gas. The experiments are performed at low temperatures (1.7 K to 19.0 K) where the colliding atoms have very low energy, so the effect of the long-range attractive forces is strongly felt and the measurements are sensitive to the depth and nature of the helium attractive well. Calculations of T[sub 1B] using the best available helium potentials have been fitted to the experimental results to test the parameters which describe the potential. The data favours a potential of the Bruch-McGee form, but having a slightly deeper attractive well of 11.5 K. The experiment also probes the adsorbed phase of ³HE via wall relaxation. Both wall relaxation and bulk gas relaxation are present in all measurements, but they can be identified by their density dependence. Measurements of wall relaxation time T[sub 1W] have been made on strongly relaxing and weakly relaxing surfaces, and the field dependence has been studied between 0.5 kG and 9.3 kG at temperatures of 2.6 K, 4.2 K and 8.0 K. The results of the field dependence are interpreted in terms of a model which considers relaxation of ³HE atoms diffusing on a plane and interacting via the dipolar coupling.
An Efficient Safety-oriented Car-following Model for Connected Automated Vehicles Considering Discrete Signals
Creators: name: Lin, Dianchao
name: Li, Li
Publisher: name: arXiv
Year: 2023
Subjects: subject: Systems and Control (eess.SY)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: With the rapid development of Connected and Automated Vehicle (CAV) technology, limited self-driving vehicles have been commercially available in certain leading intelligent transportation system countries. When formulating the car-following model for CAVs, safety is usually the basic constraint. Safety-oriented car-following models seek to specify a safe following distance that can guarantee safety if the preceding vehicle were to brake hard suddenly. The discrete signals of CAVs bring a series of phenomena, including discrete decision-making, phase difference, and discretely distributed communication delay. The influences of these phenomena on the car-following safety of CAVs are rarely considered in the literature. This paper proposes an efficient safety-oriented car-following model for CAVs considering the impact of discrete signals. The safety constraints during both normal driving and a sudden hard brake are incorporated into one integrated model to eliminate possible collisions during the whole driving process. The mechanical delay information of the preceding vehicle is used to improve car-following efficiency. Four modules are designed to enhance driving comfort and string stability in case of heavy packet losses. Simulations of a platoon with diversified vehicle types demonstrate the safety, efficiency, and string stability of the proposed model. Tests with different packet loss rates imply that the model could guarantee safety and driving comfort in even poor communication environments.
title: "Sorpresas abdominales en el TC de Urgencias. Cuerpos extraños"
Creators: name: Fdez. del Castillo Ascanio, Monica
Publisher: name: Sociedad Española de Radiología Médica
Year: 2014
Subjects: subject: Abdomen
subject: Emergency
subject: CT
subject: Acute
subject: Foreign bodies

description: Objetivo docente
Revisión del tema
Conclusiones
Bibliografía
description: Objetivo docente:
Establecer una serie de imágenes radiológicas curiosas donde la causa de la patología abdominal se basa en la presencia de cuerpos extraños (espinas de pescado,
huesos de pollo,
tampones,
body...
title: Neuroimagen en quistes aracnoideos intracraneales complicados
Creators: name: Samper Wamba, Jose Daniel
Publisher: name: Sociedad Española de Radiología Médica
Year: 2014
Subjects: subject: CT
subject: MR
subject: Neuroradiology brain

description: Objetivo docente
Revisión del tema
Conclusiones
Bibliografía
description: Objetivo docente:
Describir las posibles complicaciones de los quistes aracnoideos intracraneales. Destacar la importancia de las pruebas de neuroimagen en el diagnóstico y tratamiento de los quistes aracnoideos intracraneales...
title: Neumoperitoneo no quirúrgico: que debe saber el radiólogo, además de detectarlo.
Creators: name: Mas Gelabert, Miguel
Publisher: name: Sociedad Española de Radiología Médica
Year: 2014
Subjects: subject: Abdomen
subject: Conventional radiography
subject: CT
subject: Diagnostic procedure
subject: Acute

description: Objetivo docente
Revisión del tema
Conclusiones
Bibliografía
description: Objetivo docente:
Revisar las principales causas,
etipopatogenia y clínica del neumoperitoneo no quirúrgico,
que creemos que el radiológo debe conocer,
para valorando los antecedentes del paciente,
orientar adecuadamente al cirujano de guardia. Ilustramos el tema...
Additional file 1 of Omitting surgery in esophageal cancer patients with complete response after neoadjuvant chemoradiotherapy: a systematic review and meta-analysis
Creators: name: Park, Jaehyeon
name: Yea, Ji Woon
name: Oh, Se An
name: Park, Jae Won
Publisher: name: figshare
Year: 2021
Subjects: Medicine
Biotechnology
Developmental Biology
Cancer
Science Policy

description: Additional file 1. Table S1: Quality assessment of the included retrospective studies according to the Newcastle-Ottawa Scale (NOS).
Additional file 2 of Omitting surgery in esophageal cancer patients with complete response after neoadjuvant chemoradiotherapy: a systematic review and meta-analysis
Creators: name: Park, Jaehyeon
name: Yea, Ji Woon
name: Oh, Se An
name: Park, Jae Won
Publisher: name: figshare
Year: 2021
Subjects: Medicine
Biotechnology
Developmental Biology
Cancer
Science Policy

description: Additional file 2. Table S2: Sensitive analysis: (A) overall survival, (B) disease-free survival, (C) locoregional failure, (D) distant failure, and (E) treatment mortality.
title: Esclerosis tuberosa: el reto del diagnóstico por imagen en una enfermedad multisistémica.
Creators: name: Mas Gelabert, Miguel
Publisher: name: Sociedad Española de Radiología Médica
Year: 2014
Subjects: subject: Abdomen
subject: Bones
subject: Neuroradiology brain
subject: MR
subject: CT
subject: Ultrasound
subject: Observer performance
subject: Diagnostic procedure
subject: Genetic defects

description: Objetivo docente
Revisión del tema
Conclusiones
Bibliografía
description: Objetivo docente:
La esclerosis tuberosa es un sindrome neurocutaneo caracterizado por lesiones hamartomatosas en múltiples organos. La presencia de manifestaciones radiológicas comunes permite confirmar el diagnóstico en casos con síntomas clínicos...
Universal Mechanical Polycomputation in Granular Matter
Creators: name: Parsa, Atoosa
name: Witthaus, Sven
name: Pashine, Nidhi
name: O'Hern, Corey S.
name: Kramer-Bottiglio, Rebecca
name: Bongard, Josh
Publisher: name: arXiv
Year: 2023
Subjects: subject: Emerging Technologies (cs.ET)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: Unconventional computing devices are increasingly of interest as they can operate in environments hostile to silicon-based electronics, or compute in ways that traditional electronics cannot. Mechanical computers, wherein information processing is a material property emerging from the interaction of components with the environment, are one such class of devices. This information processing can be manifested in various physical substrates, one of which is granular matter. In a granular assembly, vibration can be treated as the information-bearing mode. This can be exploited to realize "polycomputing": materials can be evolved such that a single grain within them can report the result of multiple logical operations simultaneously at different frequencies, without recourse to quantum effects. Here, we demonstrate the evolution of a material in which one grain acts simultaneously as two different NAND gates at two different frequencies. NAND gates are of interest as any logical operations can be built from them. Moreover, they are nonlinear thus demonstrating a step toward general-purpose, computationally dense mechanical computers. Polycomputation was found to be distributed across each evolved material, suggesting the material's robustness. With recent advances in material sciences, hardware realization of these materials may eventually provide devices that challenge the computational density of traditional computers.
description: Accepted to the Genetic and Evolutionary Computation Conference 2023 (GECCO '23)
Where do Wet, Dry, and Mixed Galaxy Mergers Occur? A Study of the Environments of Close Galaxy Pairs in the DEEP2 Galaxy Redshift Survey
Creators: name: Lin, Lihwai
name: Cooper, Michael C.
name: Jian, Hung-Yu
name: Koo, David C.
name: Patton, David R.
name: Yan, Renbin
name: Willmer, Christopher N. A.
name: Coil, Alison L.
name: Chiueh, Tzihong
name: Croton, Darren J.
name: Gerke, Brian F.
name: Lotz, Jennifer
name: Guhathakurta, Puragra
name: Newman, Jeffrey A.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We study the environment of wet, dry, and mixed galaxy mergers at 0.75 < z < 1.2 using close pairs in the DEEP2 Galaxy Redshift Survey. We find that the typical environment of mixed and dry merger candidates is denser than that of wet mergers, mostly due to the color-density relation. While the galaxy companion rate (Nc) is observed to increase with overdensity, using N-body simulations we find that the fraction of pairs that will eventually merge decreases with the local density, predominantly because interlopers are more common in dense environments. After taking into account the merger probability of pairs as a function of local density, we find only marginal environment dependence of the fractional merger rate for wet mergers over the redshift range we have probed. On the other hand, the fractional dry merger rate increases rapidly with local density due to the increased population of red galaxies in dense environments. We also find that the environment distribution of K+A galaxies is similar to that of wet mergers alone and of wet+mixed mergers, suggesting a possible connection between K+A galaxies and wet and/or wet+mixed mergers. We conclude that, as early as z ~ 1, high-density regions are the preferred environment in which dry mergers occur, and that present-day red-sequence galaxies in overdense environments have, on average, undergone 1.2+-0.3 dry mergers since this time, accounting for (38+-10)% of their mass accretion in the last 8 billion years. Our findings suggest that dry mergers are crucial in the mass-assembly of massive red galaxies in dense environments, such as Brightest Cluster Galaxies (BCGs) in galaxy groups and clusters.
description: 14 pages, 7 figures, 2 tables, submitted to ApJ, revised according to the referee's comments
title: Pseudoaneurisma de arteria mesentérica: complicación infrecuente secundaria a pancreatitis aguda
Creators: name: Rodriguez Molina, Ana
Publisher: name: Sociedad Española de Radiología Médica
Year: 2014
Subjects: subject: Abdomen
subject: Pancreas
subject: Catheter arteriography
subject: CT
subject: CT-Angiography
subject: Embolisation
subject: Pathology
subject: Inflammation

description: Objetivo docente
Revisión del tema
Conclusiones
Bibliografía
description: Objetivo docente:
Los Pseudoaneurismas de arteria mesentérica son una complicación infrecuente secundaria a pancreatitis aguda.
La patología pancreática y especialmente las pancreatitis agudas tienen una una incidencia anual de 5-80 por 100.000 habitantes en la...
Electromagnetic Properties for Arbitrary Spin Particles: Part 2 $-$ Natural Moments and Transverse Charge Densities
Creators: name: Lorcé, Cédric
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In a set of two papers, we propose to study an old-standing problem, namely the electromagnetic interaction for particles of arbitrary spin. Based on the assumption that light-cone helicity at tree level and $Q^2=0$ should be conserved non-trivially by the electromagnetic interaction, we are able to derive \emph{all} the natural electromagnetic moments for a pointlike particle of \emph{any} spin. In this second paper, we give explicit expressions for the light-cone helicity amplitudes in terms of covariant vertex functions, leading to the natural electromagnetic moments at $Q^2=0$. As an application of our results, we generalize the discussion of quark transverse charge densities to particles with arbitrary spin.
description: 12 pages, 1 table
IRA: A shape matching approach for recognition and comparison of generic atomic patterns
Creators: name: Gunde, Miha
name: Salles, Nicolas
name: Hémeryck, Anne
name: Martin-Samos, Layla
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computational Physics (physics.comp-ph)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: We propose a versatile, parameter-less approach for solving the shape matching problem, specifically in the context of atomic structures when atomic assignments are not known a priori. The algorithm Iteratively suggests Rotated atom-centered reference frames and Assignments (Iterative Rotations and Assignments, IRA). The frame for which a permutationally invariant set-set distance, namely the Hausdorff distance, returns minimal value is chosen as the solution of the matching problem. IRA is able to find rigid rotations, reflections, translations, and permutations between structures with different numbers of atoms, for any atomic arrangement and pattern, periodic or not. When distortions are present between the structures, optimal rotation and translation are found by further applying a standard Singular Value Decomposition-based method. To compute the atomic assignments under the one-to-one assignment constraint, we develop our own algorithm, Constrained Shortest Distance Assignments (CShDA). The overall approach is extensively tested on several structures, including distorted structural fragments. Efficiency of the proposed algorithm is shown as a benchmark comparison against two other shape matching algorithms. We discuss the use of our approach for the identification and comparison of structures and structural fragments through two examples: a replica exchange trajectory of a cyanine molecule, in which we show how our approach could aid the exploration of relevant collective coordinates for clustering the data; and an SiO$_2$ amorphous model, in which we compute distortion scores and compare them with a classical strain-based potential. The source code and benchmark data are available at \url{https://github.com/mammasmias/IterativeRotationsAssignments}.
description: 18 pages, 19 figures
RR Lyrae Variables in Two Fields in the Spheroid of M31
Creators: name: Sarajedini, Ata
name: Mancone, Conor L.
name: Lauer, Tod R.
name: Dressler, Alan
name: Freedman, Wendy
name: Trager, S. C.
name: Grillmair, Carl
name: Mighell, Kenneth J.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present Hubble Space Telescope observations taken with the Advanced Camera for Surveys Wide Field Channel of two fields near M32 - between four and six kpc from the center of M31. The data cover a time baseline sufficient for the identification and characterization of 681 RR Lyrae variables of which 555 are ab-type and 126 are c-type. The mean magnitude of these stars is =25.29 +/- 0.05 where the uncertainty combines both the random and systematic errors. The location of the stars in the Bailey Diagram and the ratio of c-type RR Lyraes to all types are both closer to RR Lyraes in Oosterhoff type I globular clusters in the Milky Way as compared with Oosterhoff II clusters. The mean periods of the ab-type and c-type RR Lyraes are =0.557 +/- 0.003 and =0.327 +/- 0.003, respectively, where the uncertainties in each case represent the standard error of the mean. When the periods and amplitudes of the ab-type RR Lyraes in our sample are interpreted in terms of metallicity, we find the metallicity distribution function to be indistinguishable from a Gaussian with a peak at =-1.50 +/- 0.02, where the quoted uncertainty is the standard error of the mean. Using a relation between RR Lyrae luminosity and metallicity along with a reddening of E(B-V) = 0.08 +/- 0.03, we find a distance modulus of (m-M)o=24.46 +/- 0.11 for M31. We examine the radial metallicity gradient in the environs of M31 using published values for the bulge and halo of M31 as well as the abundances of its dwarf spheroidal companions and globular clusters. In this context, we conclude that the RR Lyraes in our two fields are more likely to be halo objects rather than associated with the bulge or disk of M31, in spite of the fact that they are located at 4-6 kpc in projected distance from the center.
description: 54 pages, 14 figures, accepted for publication in The Astronomical Journal, only the first pages of Tables 2 and 3 as well as Fig. 4 are shown
Energy level broadening in an N-particle system : a solvable model with a hierarchy of interactions
Creators: name: Lukac, Eugene G.
Publisher: name: University of British Columbia
Year: 2010

description: A one-dimensional chain of particles interacting through harmonic forces is used in a theoretical study of properties of the strength function which are of current interest in nuclear physics. The work was motivated by the observation of intermediate structure in the low-energy ¹²C+¹²C total reaction cross section. A nested hierarchy of harmonic oscillator systems is constructed to parallel the hierarchy of three stages through which the ¹²C+¹²C reaction is envisioned to proceed. The hierarchy consists of a "single particle" system in which one group of 12 particles interacts with another group of 12 particles through an average potential, a "doorway" system in which six groups of 4 particles interact with each other via another average potential, and a "compound" system in which all particles are grouped together. The construction and usefulness of the model is discussed with reference to the choice of potentials, the elimination of spurious states, and the possibility of actually obtaining the wavefunctions. Overlap integrals of wavefunctions, in terms of which the strength function is defined, are shown to be doable although they are, in general, N-dimensional. For each step of the hierarchy the strength function is determined, and by analyzing the fluctuations and the effect of the density of states its shape is compared to the widely used Lorentzian shape. Group theory is used to study the effect of degeneracy on the overlap integrals. Without the inclusion of quartet clustering in the last step of the hierarchy, the ratio of widths of the strength function in the hierarchy is found not to correspond to the ratio obtained in the ¹²C+¹²C experiments. Attention is drawn to the consequences of using a Lorentzian strength function for cross section extrapolations.