34 research outputs found
RETINOSCHISIS* UNUSUAL FEATURES OF THE DISEASE AND ITS MANAGEMENT BY
No full textRFTINOSCHISIS is a splitting of the retinal layers derived from the inner layer of optic cup; it usually occurs at the level of the plexiform layer. Samuels and Fuchs (1952) described the pathological anatomy of the disease and gave it this appropriate name. Similar histological pictures were described by Teng and Katzin (1953) and Franqois and Rabaey (1953), the latter giving the clinical diagnosis of retinal cyst, which was confirmed by Curtin, Norton
Percutaneous antegrade ureterolithotripsy for proximal ureteral stones: overview own experience use
No full textIntroduction. Currently, a large number of techniques are used in the treatment of patients with ureteral stones: extracorporeal shock-wave lithotripsy (ESWL), retrograde ureterolithotripsy (RULT), laparoscopic and retro-peritoneoscopic ureterolithotomy.Purpose of the study. To evaluate the possibilities and effectiveness of percutaneous antegrade ureterolithotripsy in the treatment of patients with proximal ureteral stones in comparison with transurethral contact ureterolithotripsy.Materials and methods. Twenty-eight patients with urolithiasis were treated, who underwent percutaneous antegrade ureterolithotripsy (PAULT) and 27 patients of the control group, who underwent RULT. All patients included in the study underwent a standard preoperative examination: complete blood count and urine analysis, bacteriological urine culture, biochemical tests, and X-ray research methods. Plain urography, renal ultrasound, computed tomography were used as imaging methods. The OLYMPUS URF-V3 8.4 Ch (Olympus Europa SE & Co. KG., Germany) video uretero-renoscope was used for PAULT in patients of the main group; lithotripsy was performed using thulium laser. The results of the study were subjected to statistical processing in order to determine the statistical significance of the differences between the data obtained. Quantitative variables were described using the arithmetic mean (M) and standard deviation (5). Qualitative variables were estimated by absolute and relative frequencies (percentages). The data were considered reliable at p values < 0.05.Results. The average time of surgical intervention in patients of the main group from the moment of placement of the ureteral catheter was 47 ± 12 min, with access without preliminary renal catheterization: 28 ± 4 min. Average time of surgical intervention in patients of the control group: 42.0 ± 10.7 minutes. The presented data indicate a significant (p < 0.05) greater cases' number of complete stone removal among patients of the main group compared with patients in the control group (74.0%).Conclusion. PAULT is preferred among choice treatment methods for patients with proximal ureteral large stones, for whom RULT and ESWL cannot be performed with a high level of “stone-free” rate and a minimum number of complications
The First NuSTAR Observation of 4U 1538–522: Updated Orbital Ephemeris and a Strengthened Case for an Evolving Cyclotron Line Energy
No full textWe have performed a comprehensive spectral and timing analysis of the first NuSTAR observation of the high-mass X-ray binary 4U 1538−522. The observation covers the X-ray eclipse of the source, plus the eclipse ingress and egress. We use the new measurement of the mid-eclipse time to update the orbital parameters of the system and find marginally significant evolution in the orbital period, with Pₒᵣb / Pₒᵣb= (-0.95 ± 0.37)* 10⁻⁶ yr⁻¹. The cyclotron line energy is found to be approximately 1.2 keV higher than RXTE measurements from 1997 to 2003, in line with the increased energy observed by Suzaku in 2012 and strengthening the case for secular evolution of 4U 1538−522's CRSF. We additionally characterize the behavior of the iron fluorescence and emission lines and line-of-sight absorption as the source moves into and out of eclipse.This work was supported by NASA grant NNX17AC33G. We have made extensive use of the ISISscripts, a collection of ISIS routines provided by ECAP/Remeis observatory and MIT (http://www.sternwarte.uni-erlangen.de/isis/). The colors used in plots are selected based on Paul Tol's recommendations found in SRON Technical Note SRON/EPS/TN/09-002 (https://personal.sron.nl/~pault/data/colourschemes.pdf). Some computations in Section 3 were carried out using Mathematica, version 11.3. We thank Alan Levine and Nevin Weinberg for useful discussions, and the anonymous referee for their useful suggestions.https://iopscience.iop.org/article/10.3847/1538-4357/ab03d
Basic fibroblast growth factor in the chick embryo: immunolocalization to striated muscle cells and their precursors.
No full textBiomechanical evaluation of shear force vectors leading to injury of the biceps reflection pulley: a biplane fluoroscopy study on cadaveric shoulders.
No full textThe clinical importance of the biceps reflection pulley (BRP), which stabilizes the long head of the biceps tendon (LHB) as it exits the joint, has been shown. However, there is controversy on the pathomechanism of injury to the BRP. The angular orientation of the LHB relative to its origin and distal course changes with joint positions and may place the BRP at risk for injury.To measure the course of the LHB in common arm positions and to determine the shear and normal (stabilizing) force vectors as well as the excursion of the LHB.Descriptive laboratory study.The LHBs of 8 fresh-frozen cadaveric shoulders were marked with arthroscopically injected microbeads and mounted in a custom-built shoulder rig. Data for neutral arm position, forward flexion, and abduction were collected in internal, neutral, and external rotation using biplane fluoroscopy. Bone and LHB position were reconstructed in 3 dimensions.The shear component of the resulting vector was significantly higher during internal (28.4% +/- 18.1%) compared with external rotation (18.9% +/- 9.7%; P = .0157) and was highest in neutral arm position with internal rotation (39.2% +/- 12.7%) and forward flexion with neutral rotation (36.2% +/- 10.7%). The normal force vector, stabilizing the LHB, was significantly higher in abduction (55.2% +/- 9.6%) compared with forward flexion (39.1% +/- 12.4%; P <.0001) and neutral positions (39.1% +/- 11.4%; P <.0001). The LHB excursion was significantly lower for neutral arm positions (0.7 +/- 6.0 mm) compared with forward flexion (12.6 +/- 8.3 mm; P <.0001) and abduction (12.0 +/- 6.5 mm; P <.0001).Increased shear load at forward flexion with internal or neutral arm rotation and internal rotation at neutral arm position may cause injury to the BRP. Additionally, a sawing mechanism caused by the 12-mm linear excursion combined with a load of the LHB through the BRP during elevation may also lead to lesions.Knowledge of the pathomechanisms of BRP injury may help in developing specific treatment and rehabilitation strategies as well as tests for physical examination
Tests and analysis for composite action in glulam bridge systems
No full textMarch, 1977.CER76-77RMG-JRG-JDP-JB45.Final report to the Engineering Foundation for Grant RC-A-74-6
The first GeV flare of the radio-loud narrow-line Seyfert 1 galaxy PKS 2004-447
No full textOn 2019 October 25, the Fermi-Large Area Telescope observed the first gamma-ray flare from the radio-loud narrow-line Seyfert 1 (NLSy 1) galaxy PKS 2004−447 (z=0.24). We report on follow-up observations in the radio, optical-UV, and X-ray bands that were performed by ATCA, the Neil Gehrels Swift observatory, XMM-Newton, and NuSTAR, respectively, and our multi-wavelength analysis. We study the variability across all energy bands and additionally produce γ-ray light curves with different time binnings to study the variability on short timescales during the flare. We examine the X-ray spectrum from 0.5−50 keV by describing the spectral shape with an absorbed power law. We analyse multi-wavelength datasets before, during, and after the flare and compare these with a low activity state of the source by modelling the respective SEDs with a one-zone synchrotron inverse Compton radiative model. Finally, we compare our results to gamma-ray flares previously observed from other γ-loud NLSy 1 galaxies. At gamma-ray energies (0.1−300 GeV) the flare reached a total maximum flux of (2.7±0.6)×10⁻⁶~ph~cm⁻²~s⁻¹ in 3-hour binning. With a photon index of Γ0.1−300GeV=2.42±0.09 during the flare, this corresponds to an isotropic gamma-ray luminosity of (2.9±0.8)×10⁴⁷ergs⁻¹. The γ-ray, X-ray, and optical-UV light curves covering the end of September to the middle of November show significant variability, and we find indications for flux-doubling times of ∼2.2~hours at γ-ray energies. During the flare, the SED exhibits large Compton dominance. While the increase in the optical-UV range can be explained by enhanced synchrotron emission, the elevated γ-ray flux can be accounted for by an increase in the bulk Lorentz factor of the jet, similarly observed for flaring gamma-ray blazars.We are grateful to the journal referee for a constructive criticism. We thank the Fermi-LAT collaboration members E. Ros, D. Horan, D. J. Thompson, and G. Johannesson for their comments, which helped to improve the manuscript. A. Gokus was partially funded by the Bundesministerium für Wirtschaft und Technologie under Deutsches Zentrum für Luft- und Raumfahrt (DLR grant number 50OR1607O) and by the German Science Foundation (DFG grant number KR 3338/4-1). V.S.P.’s work was supported by the Initiative and Networking Fund of the Helmholtz Association. S.M.W. acknowledges support by the Stiftung der deutschen Wirtschaft (sdw). F.D. acknowledges financial contribution from the agreement ASI-INAF n. 2017-14-H.0. We are grateful to
the ATCA, Swift, XMM-Newton, and NuSTAR PIs for approving the ToO observations, and to the mission operation teams for quickly executing them. The Fermi LAT Collaboration acknowledges generous ongoing support from a number of agencies and institutes that have supported both the development and the operation of the LAT as well as scientific data analysis. These include the National Aeronautics and Space Administration and the Department of Energy in the United States, the Commissariat à l’Energie Atomique and the Centre National de la Recherche Scientifique / Institut National de Physique Nucléaire et de
Physique des Particules in France, the Agenzia Spaziale Italiana and the Istituto Nazionale di Fisica Nucleare in Italy, the Ministry of Education, Culture, Sports, Science and Technology (MEXT), High Energy Accelerator Research Organization (KEK) and Japan Aerospace Exploration Agency (JAXA) in Japan, and the K.A. Wallenberg Foundation, the Swedish Research Council and the Swedish National Space Board in Sweden. Additional support for science analysis during the operations phase is gratefully acknowledged from the Istituto Nazionale di Astrofisica in Italy and the Centre National d’Études Spatiales in France. This work was performed in part under DOE Contract DE-AC02-76SF00515. This work made use of data from the NuSTAR mission, a project led by the California Institute of Technology, managed by the Jet Propulsion Laboratory, and funded by the National Aeronautics and Space Administration. We thank the NuSTAR Operations, Software, and Calibration teams for support with the execution and analysis of these observations. This research has made use of the NuSTAR Data Analysis Software (NuSTARDAS) jointly developed by the ASI Science Data Center (ASDC, Italy) and the California Institute of Technology
(USA). We acknowledge the use of public data from the Swift data archive. The Australia Telescope Compact Array is part of the Australia Telescope National Facility which is funded by the Australian Government for operation as a National Facility managed by CSIRO. This research has made use of a collection of ISIS functions (ISISscripts) provided by ECAP/Remeis observatory and
MIT (http://www.sternwarte.uni-erlangen.de/isis/). The colours in Fig. 1, Fig. 2, Fig. 3, and Fig. 5 were taken from Paul Tol’s colour schemes and templates (https://personal.sron.nl/ pault/).https://arxiv.org/abs/2102.1163
Hybrid Algorithm Model for Intervention to Improve Cognitive Ability for Attention Deficit Hyperactivity Disorder (ADHD)
No full textAttention Deficit Hyperactivity Disorder
(ADHD) is childhood's most common neuro
developmental disorder. ADHD children may have
trouble paying attention, controlling impulsive behavior
( may act without thinking about the results), or being
overly active. ADHD children have behavioral problems
in learning at home and atschool and lack self-control in
their lives. We can take advantage of the evolution of new
technologies to develop applications to enhance and
stimulate the learning process of children with ADHD.
This study focuses on strengthening the skills of patients
diagnosed with ADHD. It gives them a free training
ground in every cognitiveability they need to balance. It
is an online interactive learning platform that will help
ADHD patients learn new things. Through our survey,
most of the parents of the children with ADHD Agreed
that their child forgetsto do things even if they constantly
remind them, and their child misplaces the things.
ADHD Haven is created to have a safe place to remind
that you can have the same experience. The memory of
children with ADHD is described as "Low," with a
general weighted average of 3.56. To Attention majority
of the respondents' child has easily distracted by noises
or other sounds and has difficulty keeping their
Attention when doing a tedious and repetitive task. The
Attention of children with ADHD is described as "Low,"
with a general weighted average of 3.81. And their speed
majority of the respondents see their child having
difficulty completing a task. Overall, the available
weighted mean is 3.59, interpreted as Low. The response
inhibition children with ADHD. Most of the respondents"
child takes an hour to do an assignment that takes
another only for 30 minutes. Response inhibition of
children with ADHD is described as "Low," with a
general weighted average of 3.50. And lastly, the
Reaction time of children with ADHD. The majority of
the respondents' children have an unusual reaction to
things. The Reaction time of children with ADHD is
describedas "Average," with a general weighted average
of 3.40
A sociological and demographic analysis of patterns of church membership in the Church of Scotland in the urban city (Dundee)
No full textThis research was stimulated by a concern for the losses in
membership being experienced by the Church of Scotland and by the
fact that only one research study had been carried out and that
had concentrated upon the Church's recruitment of young persons.
This was seen as too narrow an approach.
The research concentrated on the urban city of Dundee and
constructed a computer database of 20,297 membership
records [1982] and 3,997 Questionnaire Survey records of actual
attenders in the 32 participating congregations. From the
straight-forward examination of the demographic and social
indicators, eg. age, sex, class, etc., a model of attending
frequency is built revealing that the Church's concern might be
wisely directed towards better administrative and pastoral care
of the existing members as its primary objective.
A further research aim was to develop spatial and 'modeling'
techniques in order that the existing patterns of allegiance and
attendance might be analysed. By examining the differentiation
between various sub-sets of members and attenders, the evidence
demonstrated that the Scottish council housing policy with its attendant displacement of population in Dundee (outlined in
chapter two), had exacerbated the phenomenon of
'membership-at-a-distance'. Distance, in itself produced lower
rates of observance, and it is argued, in turn leads to a greater
risk of lapsing.
The total effect of distant membership also produces
congregations no longer existing as coterminous with geographic
parish areas. The Church has continued to unite and merge these
spatially distributed congregations thus severing residual
allegiance ties and adding to the losses experienced from other
causes.
The main conclusion of this research is that the Church has
mistakenly attempted to respond to the situation with an
institutional 'reaction', whereas the real need for the present
is to acknowledge the primacy of the existence of these
congregations and to restructure its ministry and resources to
support the continuing existence of the congregations. It is
argued that a pastoral response is what has been lacking, and in
the absence of reliable, large scale studies, planning has
proceeded on the false basis that the 'parish' concept was a
suitable criteria in every circumstance.
In the concluding chapter, several practical recommendations
are made in respect of the churches own procedures, these being
derived from close acquaintance with the evidence of the data
