3,061 research outputs found
Pediatric Chest MR Imaging Sedation, Techniques, and Extracardiac Vessels
No full textThoracic MR imaging in the pediatric population provides unique challenges requiring tailored protocols and a practical approach to pediatric issues, such as patient motion and sedation. Concern regarding the use of ionizing radiation in the pediatric population has continued to advance the use of MR imaging despite these challenges. This article provides a practical approach to thoracic vascular MR imaging with special attention paid to pediatric-specific issues such as sedation. Thoracic vascular anatomy and pathology are discussed with an emphasis on protocols that can facilitate accurate diagnosis
Pediatric Chest MR Imaging Lung and Airways
No full textAdvances in technology coupled with optimized protocols now permit evaluation of the lungs with magnetic resonance (MR) imaging in the pediatric population. Although computed tomography remains the preferred imaging modality for this purpose, MR imaging provides a radiation-free alternative that can answer many important clinical questions and provide additional data. In addition, the use of newer techniques and equipment such as MR-imaging-compatible spirometers allows for functional assessment of the pediatric airways. This article reviews the up-to-date MR imaging techniques as well as imaging findings of selected clinically important disorders that affect the lungs and airways in the pediatric population
[Drowning mortality trends in children younger than 5 years old in Mexico, 1979-2008]
No full textOBJECTIVE: To describe mortality trends from drowning in children younger than 5 years old. MATERIALS AND METHODS: Mortality records of children younger than 5 years old were obtained from the National Health Information (SINAIS) system of Mexico from 1979 to 2008. Cause of death by asphyxia was established according to the International Classification of Diseases (ICD 9th and 10th). We analyzed age, sex, federal state, year and place where the event occurred. RESULTS: Fatal drowning diminished from 7.64 in 1979 to 3.59 deaths per 100,000 in 2008. This trend was observed throughout the assessment period and in all federal states. Children younger than 2 years showed the highest rate of death. Mortality was higher in males than females (1.7:1). A great proportion of events happen at home. CONCLUSION: Drowning mortality among children less than 5 years old in Mexico shows a downward trend in all states
[Drowning mortality trends in children younger than 5 years old in Mexico, 1979-2008]
No full textOBJECTIVE: To describe mortality trends from drowning in children younger than 5 years old. MATERIALS AND METHODS: Mortality records of children younger than 5 years old were obtained from the National Health Information (SINAIS) system of Mexico from 1979 to 2008. Cause of death by asphyxia was established according to the International Classification of Diseases (ICD 9th and 10th). We analyzed age, sex, federal state, year and place where the event occurred. RESULTS: Fatal drowning diminished from 7.64 in 1979 to 3.59 deaths per 100,000 in 2008. This trend was observed throughout the assessment period and in all federal states. Children younger than 2 years showed the highest rate of death. Mortality was higher in males than females (1.7:1). A great proportion of events happen at home. CONCLUSION: Drowning mortality among children less than 5 years old in Mexico shows a downward trend in all states
Perancangan Sistem Informasi Pengelola Barang/Inventaris Di Jc Komp
No full textInventory information system is a system used to enter inventory data into the database, so that there are no errors in input, output data, and reporting based on the desired data. based on surveys and interviews with jc comp personnel, information was obtained that the existing system in the jc comp warehouse section is still manual. therefore, the system that will be created by the author is the result of a replication of the existing system in the jc comp warehouse section. in addition to the process of input and output of goods, this information system is also equipped with features for creating data reports, input and output of goods, and searching for goods data by item name. with the inventory information system is expected to be useful for the warehouse parts jc comp. By implementing this system in the jc comp warehouse, it is hoped that it can reduce errors that may occur. this system is also expected to further speed up the process of input, output, and report generation, which in turn will help the jc comp warehouseSistem Informasi Persediaan Barang adalah sebuah sistem yang digunakan untuk memasukkan data-data persediaan barang ke dalam database, sehinggga tidak terjadi kesalahan dalam input, output data, dan pembuatan laporan berdasarkan data yang diinginkan. Berdasarkan survey dan wawancara dengan bagian personalia Jc Komp, didapatkan informasi bahwa sistem yang ada dibagian gudang Jc Komp masih manual. Oleh karena itu, sistem yang akan dibuat oleh penulis adalah hasil replikasi dari sistem yang telah ada dibagian gudang Jc Comp. Selain proses input dan output barang, pada sistem informasi ini juga dilengkapi fitur pembuatan laporan data, input, dan output barang, dan pencarian data barang berdasarkan nama barang. Dengan adanya Sistem Informasi persediaan barang ini diharapkan dapat bermanfaat bagi bagian gudang Jc Komp. Dengan diterapkannya sistem ini pada bagian gudang Jc Comp, maka diharapkan dapat mengurangi kesalahan-kesalahan yang mungkin terjadi. Sistem ini juga diharapkan dapat lebih mempercepat proses input, output, dan pembuatan laporan yang pada akhirnya dapat membantu bagian gudang Jc Komp
Amenable L-2-Theoretic Methods and Knot Concordance
No full textWe reveal new structures in the topological knot concordance group. As a key ingredient, we develop obstructions using L-2-theoretic methods for amenable groups in Strebel's class recently introduced by Orr and the author. Concerning (h)-solvable knots, which are defined in terms of certain Whitney towers of height h in bounding 4-manifolds, we show the following: for any n>1, there are (n)-solvable but non-(n. 5)-solvable (and therefore nonslice) knots, which are not detected by prior methods using Cochran-Orr-Teichner L-2-signature obstructions as well as Levine algebraic obstructions and Casson-Gordon invariants.X1197sciescopu
Dynamics of Network Formation Processes in the Co-Author Model
No full textThis article studies the dynamics in the formation processes of a mutual consent network in game theory setting: the Co-Author Model. In this article, a limited observation is applied and analytical results are derived. Then, 2 parameters are varied: the number of individuals in the network and the initial probability of the links in the network in its initial state. A simulation result shows a finding that is consistent with an analytical result for a state of equilibrium while it also shows different possible equilibria.Dynamics, Network, Game Theory, Model,Simulation, Equilibrium, Complexity
High-level polyomavirus JC viruria following long-term steroid therapy
No full textCASE REPORT JC virus is a highly seroprevalent ubiquitous polyomavirus which is acquired at an early age through respiratory or oral route, Thereafter JCV establishes persistent, but mainly asymptomatic, infections in various tissues, including the genitourinary tract and brain Corresponding author Cristina Costa, MD S.C.D.U. Virologia Azienda Ospedaliero-Universitaria San Giovanni Battista di Torino Via Santena, 9 -10126 Torino E-mail: [email protected] increasing with age, with adult prevalence rate often between 15% and 60
Engineering Framework to Utilize Miniaturized Charpy Type SE(B) Specimens to Predict Jc of Full Sized Specimens
No full textAbstractThis paper introduces our experience of using miniature Charpy type SE(B) specimen in obtaining fracture toughness Jc of a material in the ductile to brittle transition temperature (DBTT) region. Width W x thickness B of 2 x 2 mm, 3 x 3 mm and 10 x 10 mm were chosen as miniature specimens and 25 x 25 mm were chosen as full sized specimen. 0.55% carbon steel JIS S55C, whose tensile to yield stress ratio σTS/σYS was equal to 1.8 was chosen as a material to simulate a degraded (embrittled) material in the DBTT region. Focus was placed on whether cleavage fracture could be predicted for these miniaturized specimens. Another focus was placed on whether the Jc of full sized specimen is predictable from the test results of the miniature sized specimens, in case cleavage fracture were observed. The results showed that the modified Ritch-Knott-Rice (RKR) failure criterion (which predicts the onset of cleavage fracture when the crack opening stress measured at 4 times the crack-tip opening displacement exceeds this σ22c) could predict whether cleavage fracture would occur or not. Another finding was that, in case cleavage fracture was observed though, the critical value σ22c in the modified RKR failure criterion was independent of specimen size, and thus, Jc of the full sized specimen is predictable from the miniature specimen test results, though M = (W-a)σYS/Jc was smaller than ASTM E1921 requirement of 30. Here, a and σYS are crack length and yield strength, respectively
The 2015 Illapel earthquake: a comprehensive assessment
No full textOn September 16, 2015, the convergent Chilean margin again experienced a great subduction megathrust earthquake.
The MW=8.2 Illapel earthquake occurred in the Metropolitan segment north of where the Juan-Fernandez
ridge meets the Chile trench and subduction style and geometry change over a short distance. Combining GPS
displacement measurements, InSAR interferograms, strong motion data, broadband seismological waveforms and
backprojection of high frequency teleseismic signals we derive a comprehensive description of the coseismic rupture.
Further, we determine accurate depths for the mostly offshore aftershock sequence by careful observations of
teleseismic depth phases and derive moment tensors for the larger earthquakes from waveform modelling of bodyand
surface waves. The rupture nucleated near the coast but then propagated to the north and updip. The resulting
simple rupture geometry is approximately circular with a peak slip of 6 m, and a diameter of approximately 100
km, centered below the middle slope of the forearc. Forward modelling of tsunami propagation for this model
successfully predicts approximate tsunami wave heights measured at 3 tide gauges along the North Central Chile
coast, confirming that the rupture diminished towards the trench. Similar to previous observations, high frequency
seismic radiation is mostly emitted downdip of the region of most intense slip, but unlike in most previous events,
the high frequency emitters do not track the whole rupture along-strike but are confined to a small region within
∼ 50 km of the epicenter. The time evolution of high frequency seismic radiation also peaks earlier than the long
period rupture evolution, indicating that the final phase of the rupture progressed smoothly. The aftershocks extend
significantly beyond the limits of the main rupture in both north and south direction; their pattern of propagation
suggests triggering by coseismic changes to the Coulomb failure stress. Plate interface events dominate the aftershock
sequence but there are also some thrust events in the forearc crust and some shallow normal faulting events
in the oceanic crust below the trench. In 1943, an earthquake of comparable along-strike extent occurred in the
Illapel area. The similar extent of the aftershock zone and tsunami heights therefore make this part of the margin
a candidate site for generating characteristic earthquakes, in particular as the 1943 event was itself preceded by
an event in 1880, again with apparently the same part of the margin affected. The approximate match of peak slip
and accumulated slip deficit in the 72 years since the 1943 event also support this interpretation. However, the
1943 Illapel event appears to have had a shorter source time function and probably a smaller magnitude than the
2015 event, pointing to differences in the detailed rupture evolution. The coupling is mostly close to fully locked
in this area at least along the coast line but nevertheless the coseismic rupture is associated with a local peak in the
locking pattern, whereas a distinct narrow partially interseismically creeping area is found just to the south of the
main rupture. The northern transition to lower locking is more gradual but also here the rupture can be said to have
terminated against a zone of reduced locking. Although locally the recent Illapel earthquake has relieved much of
the accumulated stress, the segment immediately adjacent to the north remains unbroken since 1922, and presents
a serious earthquake and tsunami hazard
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