Academic literature on the topic 'Consecutive crossing'
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Journal articles on the topic "Consecutive crossing"
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Sun, Yidong, and Zhiping Wang. "Consecutive Pattern Avoidances in Non-crossing Trees." Graphs and Combinatorics 26, no. 6 (2010): 815–32. http://dx.doi.org/10.1007/s00373-010-0950-9.
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Staš, Michal. "On the Crossing Numbers of the Joining of a Specific Graph on Six Vertices with the Discrete Graph." Symmetry 12, no. 1 (2020): 135. http://dx.doi.org/10.3390/sym12010135.
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In the paper, we extend known results concerning crossing numbers of join products of small graphs of order six with discrete graphs. The crossing number of the join product G ∗ + D n for the graph G ∗ on six vertices consists of one vertex which is adjacent with three non-consecutive vertices of the 5-cycle. The proofs were based on the idea of establishing minimum values of crossings between two different subgraphs that cross the edges of the graph G ∗ exactly once. These minimum symmetrical values are described in the individual symmetric tables.
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Gill, Amrendra, Madeti Prabhakar, and Andrei Vesnin. "Gordian complexes of knots and virtual knots given by region crossing changes and arc shift moves." Journal of Knot Theory and Its Ramifications 29, no. 10 (2020): 2042008. http://dx.doi.org/10.1142/s0218216520420080.
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Gordian complex of knots was defined by Hirasawa and Uchida as the simplicial complex whose vertices are knot isotopy classes in [Formula: see text]. Later Horiuchi and Ohyama defined Gordian complex of virtual knots using [Formula: see text]-move and forbidden moves. In this paper, we discuss Gordian complex of knots by region crossing change and Gordian complex of virtual knots by arc shift move. Arc shift move is a local move in the virtual knot diagram which results in reversing orientation locally between two consecutive crossings. We show the existence of an arbitrarily high-dimensional simplex in both the Gordian complexes, i.e. by region crossing change and by the arc shift move. For any given knot (respectively, virtual knot) diagram we construct an infinite family of knots (respectively, virtual knots) such that any two distinct members of the family have distance one by region crossing change (respectively, arc shift move). We show that the constructed virtual knots have the same affine index polynomial.
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Sibrecht, Greta, Jarosław Piskorski, Tomasz Krauze, and Przemysław Guzik. "Asymmetric Properties of the Heart Rate Microstructure in Healthy Adults during 48 h ECG Recordings." Journal of Clinical Medicine 12, no. 23 (2023): 7472. http://dx.doi.org/10.3390/jcm12237472.
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Heart rate asymmetry reflects the different contributions of heart rate (HR) decelerations and accelerations to heart rate variability (HRV). We examined the contribution of monotonic runs of HR accelerations and decelerations to the asymmetric properties of the HR microstructure in the 48 h electrocardiograms (ECGs) of healthy adults (n = 101, 47 males, average age of 39 years) and analysed sex differences in the HR microstructure. The HR microstructure was asymmetric for runs of most lengths, except for sequences of two consecutive decelerations (DR2s) or accelerations (AR2s). Women had a higher prevalence of AR2s than men but fewer runs in the range of 4 to 11 consecutive accelerations (AR4–AR11s) and 5 to 11 consecutive decelerations (DR5–DR11s). The longest runs consisted of 47 consecutive accelerations (AR47s) and 27 consecutive decelerations (DR27s). More DR3s than AR3s and more DR4s than AR4s reveal a crossing of HR microstructure asymmetry. In conclusion, more acceleration than deceleration runs demonstrate that the HR microstructure was asymmetric in the 48 h ECGs. This phenomenon was present in both sexes but was more pronounced in men. For shorter runs of 3 and 4 consecutive heartbeats, there was a crossing of HR microstructure asymmetry, with more deceleration than acceleration runs.
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Aleh, Marozau, and Yu. Baranov Oleg. "Hybridity of a plant created in a combination of crossing of (Vaccinium uliginosum L. × V. vitis-idaea L.) × Oxycoccus macrocarpus (Aiton) Pursh at the tetraploid level." FOLIA FORESTALIA POLONICA, SERIES A – FORESTRY 60, no. 4 (2018): 281–91. https://doi.org/10.2478/ffp-2018-0029.
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The aim of the study was to determine the hybridity of the F1 generation of <em>Vaccinium cf. uliginosum</em> × <em>V. vitis-idaea</em> × <em>Oxycoccus macrocarpus</em> created through the consecutive crossing of some common berry species of the family Ericaceae (bog whortleberry, cowberry and marsh cranberry) at the tetraploid level. Certain aspects of phenology and morphometric parameters of vegetative organs of the supposed hybrid and parent plants were analysed using traditional methods of comparative analysis. Molecular genetic assay, including random amplification of polymorphic DNA, simple sequence repeat and sequencing, were also used. Comparison of the phenological and morphometric features of the experimental plant and its parents allows suggesting that in the combination of crossing of (<em>V. uliginosum</em> × <em>V. vitis-idaea</em>) × <em>O. macrocarpus</em> (the cultivar Searles), a three-species hybrid was created. The allelic variants, specific for <em>V. uliginosum</em>, <em>V. vitis-idaea</em> and <em>O. macrocarpus</em>, were detected in the <em>V. cf. uliginosum</em> × <em>V. vitis-idaea</em> × <em>O. macrocarpus</em> genotype. A next-generation sequencing approach is suggested for estimating the share of the genomes of <em>Vaccinium</em> spp. in the formation of the interspecies hybrid.
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Zheng, Lai, Cheng Wen, Yanyong Guo, and Aliaksei Laureshyn. "Investigating consecutive conflicts of pedestrian crossing at unsignalized crosswalks using the bivariate logistic approach." Accident Analysis & Prevention 162 (November 2021): 106402. http://dx.doi.org/10.1016/j.aap.2021.106402.
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Arruda, Guilherme Oliveira Santos Ferraz de, Adelar Mantovani, Tiago Montagna, Alison Paulo Bernardi, Newton Clóvis Freitas da Costa, and Maurício Sedrez dos Reis. "REPRODUCTIVE SYSTEM of Mimosa scabrella IN CONSECUTIVE REPRODUCTIVE EVENTS IN THE MOUNTAINOUS REGION OF SANTA CATARINA STATE." FLORESTA 50, no. 2 (2020): 1259. http://dx.doi.org/10.5380/rf.v50i2.62515.
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The reproductive system determines evolutionary inheritance of populations by establishing patterns of gametes union to originate the next generation. The objective of this study was to investigate the mating system of Mimosa scabrella Benth. (bracatinga), a Brazilian tree species with socioeconomic and ecological importance, in a population of the mountainous region of Santa Catarina state, in two consecutive reproductive events. The analyzes in the 2015 and 2016 reproductive events were lead with isoenzymatic markers and the mating system characterization was performed based on mixed crosses and correlated crosses models, and the means of each parameter were statistically compared. Among the results, the multilocus outcrossing rates (tm(2015): 0.925 and tm(2016): 0.845) showed high magnitude and differed from the unit; the self-fertilization rates were significantly different from zero (s (2015): (0.075 and(2016): 0.155) indicating that the species does not show self-incompatibility. In addition, the positive outcrossing rates among relatives (tm-ts(2015): 0.142 and tm-ts(2016): 0.170) suggest inbreeding crosses in the population. The highest proportions in offspring were half-sibs (2015: 0.736 and 2016: 0.579), suggesting predominance of randomness at crossings. From this it is concluded that M. scabrella has a mixed mating system, with predominance of crossing at population level.
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Mutholib, Abdul. "KaJian Peranan ASDP Merak Dalam Mendukung Pengembangan Angkutan Logistik Nasional." Warta Penelitian Perhubungan 23, no. 3 (2019): 273. http://dx.doi.org/10.25104/warlit.v23i3.1068.
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Merak harbor crossing is one of the infrastructure that serves 80 percent of Indonesia's economy in the island of Java and Sumatra. Merak harbor crossings currently has 5 dock supported by a fruit terminal with an area of 8260 m2 bus that can accommodate 330 buses. In addition there is also a parking lot to accommodate vehicles waiting to enter the vessel with an area of 18 ha can accommodate 752 vehicles. Based on data obtained from the office of the Administrator port of Bantam, Over the past three consecutive years ie 2007 - 2009. respectively in 2007 transported 6, 8 million tons of goods, in 2008 transported 5. 7 million tons while for the year 2009 rose to 7.2 million tonnes. The increasing demand for transportation services of PT Indonesia Ferry crossings as a port operator plans to cooperate with the municipal government to build the dock VI Cilegon near the area of Integrated Terminal Peacock (ITM). The plan is dedicated dock for passengers pedestrians. VI Pier development project is planned to be conducted early 2011
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Yang, Zhi Chao, Zhen Cheng Hu, Jing Xin Na, and Tong Wang. "A Novel Lane Departure Warning System Based on Surrounding View." Applied Mechanics and Materials 229-231 (November 2012): 1464–68. http://dx.doi.org/10.4028/www.scientific.net/amm.229-231.1464.
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Lane departure warning system based on surrounding view is a human-made decision such as solution to avoid lane departure fatalities with low cost and high reliability. In this paper, the key parameters of time to lane crossing (TLC) and distance to lane crossing (DLC) are all calculated from image processing(the corner detect and the optic flow). In the warning module, two strategies are proposed to improve the reliability of the system. After adjusting the threshold values on abundance frames of consecutive images, the refined threshold of the two strategies are determined. Finally, the proposed strategies are incorporated into our lane departure warning system to be tested in off-line simulation. The results indicate the efficiency and feasibility of our system.
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Tomoi, Yusuke, Mitsuyoshi Takahara, Masahiko Fujihara, et al. "IVUS Assessment of the Crossing Pathway of an Intraluminal Reentry Device Used in the Primary Treatment of Infrainguinal Chronic Total Occlusions." Journal of Endovascular Therapy 27, no. 1 (2019): 69–76. http://dx.doi.org/10.1177/1526602819884054.
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Purpose: To examine with intravascular ultrasound (IVUS) the crossing pathways of the TruePath reentry device during primary antegrade recanalization of infrainguinal chronic total occlusions (CTOs). Methods: Between July 2017 and September 2018, a prospective multicenter study enrolled 143 consecutive patients (mean age 75±9 years; 101 men) with 146 CTOs treated in an antegrade approach using the TruePath reentry device with IVUS assessment of the crossing pathway in successful cases. Outcome measures were complete success (reentry device reached the distal true lumen), assisted success (reentry device use followed by a conventional guidewire to reach the distal true lumen), reentry device crossing route by IVUS assessment, and procedure- and device-related complications. Regression analyses were employed to identify any relevant associations between baseline patient variables and the outcome measures; results are presented as the odds ratio (ORs) and 95% confidence interval (CI). Results: Complete success was achieved in 82 (56.2%) lesions; any success (complete plus assisted) was documented in 117 (80.1%) lesions. Four (3%) perioperative device-related complications were observed. The crossing route was intraplaque for most of the total crossing distance in both complete success cases (95.3%±13.2%) and any success cases (94.8%±14.4%), with relatively short subintimal (3.6%±10.2% and 4.2%±11.2%, respectively) or intramedial (1.2%±5.8% and 1.0%±5.4%, respectively) crossing. CTO length was a significant risk factor for not achieving complete success (OR 1.74, 95% CI 1.13 to 2.68, p=0.012), and a history of failed revascularization was associated with not achieving any success (OR 6.40, 95% CI 1.28 to 28.9, p=0.038). Conclusion: The intraplaque route was the primary pathway taken by the TruePath reentry device as it crossed infrainguinal CTOs. Crossing rates were acceptable, with few device-related complications. However, a longer CTO length and a failed revascularization history negatively affected the success rate.
Book chapters on the topic "Consecutive crossing"
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Alasti, Hadi. "Level Crossing Sampling for Energy Conservation in Wireless Sensor Networks." In Wireless Technologies. IGI Global, 2012. http://dx.doi.org/10.4018/978-1-61350-101-6.ch209.
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In periodic sampling of the bandlimited signals, many of the consecutive samples are very similar and sometimes the signal remains unchanged over periods of time. These samples can be interpreted as redundant. For this, transmission of all of the periodic samples from all of the sensors in wireless sensor networks is wasteful. The problem becomes more challenging in large scale wireless sensor networks. Level crossing sampling in time is proposed for energy conservation in real-life application of wireless sensor networks to increase the network lifetime by avoiding the transmission of redundant samples. In this chapter, a design framework is discussed for application of level crossing sampling in wireless sensor networks. The performance of level crossing sampling for various level definition schemes are evaluated using computer simulations and experiments with real-life wireless sensors.
Conference papers on the topic "Consecutive crossing"
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Klechka, Ernest W. "Dual Powder FBE Coatings Used for Directionally Drilled Alaskan River Crossings." In CORROSION 2003. NACE International, 2003. https://doi.org/10.5006/c2003-03045.
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Abstract During the installation of a directionally drilled river crossing the coating is subject to high soil stress and potential coating damage. Tough, flexible coatings are needed to minimize coating damage during installation. Dual powder fusion bond epoxy (FBE) coatings met these rigorous demands. Dual powder FBE coatings are easily applied in most coating facilities setup for FBE. Two layers dual powder systems are applied consecutively usually in the same electrostatic spray gun chamber. Surface preparation, pre-coating inspection, and post-coating inspection are similar to standard FBE coating. Field weld joint coatings were applied using either liquid epoxies or a modified dual powder fusion bond epoxy coating application. Coating damage caused by dragging the piping across the ice was minimal.
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Constantinescu, Andrei, and Roger Wattenhofer. "Voting in Two-Crossing Elections." In Thirty-First International Joint Conference on Artificial Intelligence {IJCAI-22}. International Joint Conferences on Artificial Intelligence Organization, 2022. http://dx.doi.org/10.24963/ijcai.2022/30.
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We introduce two-crossing elections as a generalization of single-crossing elections, showing a number of new results. First, we show that two-crossing elections can be recognized in polynomial time, by reduction to the well-studied consecutive ones problem. Single-crossing elections exhibit a transitive majority relation, from which many important results follow. On the other hand, we show that the classical Debord-McGarvey theorem can still be proven two-crossing, implying that any weighted majority tournament is inducible by a two-crossing election. This shows that many voting rules are NP-hard under two-crossing elections, including Kemeny and Slater. This is in contrast to the single-crossing case and outlines an important complexity boundary between single- and two-crossing. Subsequently, we show that for two-crossing elections the Young scores of all candidates can be computed in polynomial time, by formulating a totally unimodular linear program. Finally, we consider the Chamberlin-Courant rule with arbitrary disutilities and show that a winning committee can be computed in polynomial time, using an approach based on dynamic programming.
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Jasper, Steve, Jason D. Harris, and Raymond Doering. "The SWAT Approach for Pipeline Watercourse Crossings." In 2010 8th International Pipeline Conference. ASMEDC, 2010. http://dx.doi.org/10.1115/ipc2010-31358.
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This paper describes a multi-year program to assess pipeline crossings of sensitive watercourses along a major pipeline project. During the Front End Engineering and Design (FEED) phase a sensitive watercourse assessment team (SWAT) was established to provide a biophysical and construction assessment of selected watercourses to be crossed by a proposed pipeline project in western Canada. The SWAT comprised a fisheries biologist, a pipeline watercourse construction specialist and other technical support personnel. The field work included assessing biophysical data, fish habitat values, access to the crossing location, construction issues, site-specific mitigative measures and potential habitat compensation options, as well as providing photo documentation and a conceptual crossing sketch. The advantages of the SWAT assessment at a crossing site were: • It provided an effective and efficient field assessment of the proposed watercourse crossing in the early phase of the project. • It was a multidisciplinary assessment. • It provided a recommendation as to a preferred crossing location at the site. • It provided a recommendation as to preferred crossing method and timing of construction at the site. • The data were site-specific to the preferred crossing location. Three consecutive years of baseline biophysical field data were compiled and site reports generated using a custom designed database. Over 200 sensitive watercourses were identified based on environmental, geotechnical, and constructability factors and were visited by the SWAT team, sometimes more than once, for a total of 271 individual site assessments. Data collected during the FEED phase included site-specific information that can be used for ongoing project discussions, regulatory and community consultations, permitting and Fisheries and Oceans Canada (DFO) authorizations. The SWAT program also provided recommendations for minor or significant shifts in crossing location for 40% of the sites visited, resulting in changes to the pipeline alignment during the route evolution process.
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Harne, R. L., and K. W. Wang. "Mass Detection via Bifurcation Sensing With Multistable Microelectromechanical System." In ASME 2013 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/smasis2013-3026.
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In many applications, the detection of changing gaseous or liquid concentration within an environment is accomplished by monitoring the shift in resonance frequency of a microelectromechanical system designed to adsorb the target analyte. Recently, mass sensing using the onset and crossing of a dynamic bifurcation has been shown to reduce the mass threshold which may be detected. This approach effectively replaces detection of an analog quantity resolved by hardware capability (phase shift or resonant frequency) with a digital quantity having fundamental resolution restricted by system noise (crossing the bifurcation). While promising, successful sensing with oscillators continually excited near a system bifurcation is practically limited in performance by repeatable characteristics close to the critical crossing frequency and the passive detection ability of the sensors has not yet extended to mass quantization over a period of time. In this research, we explore an alternative method to exploit bifurcation for mass sensing by utilizing a new sensor system composed of a small bistable element within a primary linear host sensor that helps alleviate these concerns. The proposed system design provides adjustable control of the rate at which the bifurcation is crossed, helping to tailor the sensitivities of the system encountered in the transition region, introduces new bifurcations to exploit, and lends the opportunity to utilize the numerous bifurcation phenomena sequentially to denote mass accumulation quantity occurring between consecutive jump events. The conceptual underpinnings of the method are presented in detail and example operational trials are demonstrated by simulation to expound its operation and adjustability. Discussion is provided to evaluate the system in terms of existing bifurcation-based mass sensing approaches and to outline remaining goals.
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Bitner-Gregersen, Elzbieta M., Odin Gramstad, Anne Karin Magnusson, and Pierre C. Sames. "Occurrence Frequency of a Triple Rogue Wave Group in the Ocean." In ASME 2020 39th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/omae2020-19314.
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Abstract At 18:20 November 30, 2018, a triple rogue wave group was recorded in the central North Sea. These three consecutive rogue waves, subsequently called “Justine Three Sisters”, were recorded at a single point by a SAAB REX radar. The Norwegian Meteorological Institute’s operational wave forecast model and WAMOS marine radar’s measurements show that they appeared in a crossing sea condition with angle between wind sea and swell being 60 degrees, with swell energy much lower than the wind sea energy but with approximately the same peak frequency. We use the nonlinear wave model HOSM (Higher Order Spectral Method) to investigate frequency of occurrence of such an event in the ocean. Input to the simulations has been a wave frequency-directional spectrum generated by the operational wave forecast model of the Norwegian Meteorological Institute having 4 km resolution. The investigations show that occurrence of three consecutive rogue waves at a single point is a very seldom event in the ocean, which can, however, be reproduced in time domain HOSM simulations if sufficient number of realizations is performed. With the HOSM model being able to capture essential physics of ocean waves, we can assume to predict occurrence frequency from simulations. The study demonstrates also the effect of sampling variability on sea surface elevation and illustrates limitation of single point measurements, using the sea state in which “Justine Three Sisters” occurred as an example. Importance of using spacetime statistics in description of ocean waves as well as in design and operations of marine structures is also discussed.
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Magnusson, Anne Karin, Karsten Trulsen, Ole Johan Aarnes, Elzbieta M. Bitner-Gregersen, and Mika P. Malila. "“Three Sisters” Measured As a Triple Rogue Wave Group." In ASME 2019 38th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/omae2019-96837.
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Abstract On November 30, 2018, our attention was caught when analyzing wave profile time series measured by a platform mounted wave sensor (a SAAB REX radar) at Ekofisk, central North Sea. The 20-minute time series had not only one, but three consecutive waves with individual heights that all were more than twice the significant wave height, the two last of them being almost equally high with a factor 2.35 to the significant wave height of 4m (from 4σ(η), over 20 minutes). Counting three rogue waves in one sequence seems to be very rare. In this study we analyze how the shape is evolving in space and time using linear and non-linear propagation methods developed by Mark Donelan [1,2] and Karsten Trulsen [3,4]. Weather conditions and characteristics of the sea state with the ‘Three Sisters’ (named the “Justine Three Sisters”) are presented. It is found that the Three Sisters occurred in a crossing sea condition, with wind sea and swell coming from directions 60 degrees apart, with about same frequency, but very different energy.
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Hada, Mohit, M. Y. Dixit, P. V. Bhatnagar, Debashis Das, and P. K. Mukhopadhyay. "Online Diagnostics of Reactivity Meter for Indian Nuclear Power Plants." In 17th International Conference on Nuclear Engineering. ASMEDC, 2009. http://dx.doi.org/10.1115/icone17-75922.
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An online reactivity meter is developed for use in the Indian Nuclear Power Plants (INPP). The reactivity meter is required to generate reactor trip whenever the calculated reactivity exceeds the predefined limits. The computation of reactivity is based on inverse point kinetic model of the reactor with six groups of delayed neutrons. The recursive equations representing the change in reactivity in response to change in neutron flux have been formulated and solved online for determining the reactivity at any instant using Gate Array. The online diagnostics features have been integrated with the reactivity computation to verify its correctness and healthiness of the meter. The online diagnostic scheme encompasses checking of all the major hardware components, viz. EPROM, ADC, DAC and their interfaces with the Gate Array. It also monitors the robustness of Gate Array and the correctness of the computational cycle algorithms implemented in Gate Array by incorporating suitable checks for stuck bits, improper timings, faulty logic, range crossing, etc., including floating point exceptions. Upon detecting fault(s), limited consecutive attempts towards validation of fault are performed. On confirmation of fault the reactivity computation is halted and output goes to a failsafe state.
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Yu, Mengshan, James Gibeault, Yanping Li, and Trevor Place. "Impact of Operating Temperature Increase on Liquid Pipeline Corrosion Management." In 2024 15th International Pipeline Conference. American Society of Mechanical Engineers, 2024. https://doi.org/10.1115/ipc2024-132421.
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Abstract Some liquid pipeline operators are experiencing an upward trend in operating temperatures. This trend is influenced by increasing flowrate through fixed pipeline inventory (viscous heating), hotter product entering some pipelines, and environmental warming (less heat loss to soil and atmosphere). While increasing temperature is known to increase the degradation rate of some coatings and the often-mentioned Arrhenius Equation suggests chemical reaction rate could double with every 10°C temperature increase, the true effect on pipeline corrosion is not fully understood. The real-world impact of temperature changes is a complex interaction of physical and chemical processes. To find the impact of temperature increase on pipeline external corrosion growth rate (CGR), results from laboratory studies and field case studies will be presented. Long term corrosion testing was performed under a simulated coating disbondment condition at various fixed and modulated temperatures (to simulate seasonal variation). Corrosion rates were measured gravimetrically and by measured pit depth. It was demonstrated that Arrhenius level CGR-temperature correlations could be emulated under artificially severe conditions, but more realistic conditions produced a far lower CGR. Long term case histories were conducted on liquid pipelines by investigating their temperature profiles, CGR (derived from consecutive in-line-inspections) and repair frequency before and after temperature increase. For a portion of one pipeline, an increase in maximum and average operating temperature of up to 10°C was observed starting in 2014. This line is 1960s vintage with polyethylene (PE) tape coating. After several years of operation at the increased temperature, no clear correlation was observed between operating temperature increase and corrosion degradation or repair frequency. This same trend is observed on another PE coated line. These observations align with the above laboratory testing. However, in another unique case study, a 1950s vintage coal tar coated pipeline experienced very rapid external corrosion within a cased crossing shortly after the pipeline operating temperature was increased, suggesting that operating temperature increases may still require change management consideration. Recommendations on liquid pipeline corrosion management with increased operating temperature will be presented.
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Rowbotham, B., A. N. Whitaker, J. D. N. Bett, et al. "CLINICAL APPLICATIONS OF THE MEASUREMENT OF CROSSLINKED FIBRIN DEGRADATION PRODUCTS FOLLOWING MYOCARDIAL INFARCTION." In XIth International Congress on Thrombosis and Haemostasis. Schattauer GmbH, 1987. http://dx.doi.org/10.1055/s-0038-1643649.
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Crosslinked fibrin degradation products (XLFDP) were measured serially in 135 consecutive admissions to a coronary care unit. Plasma was assayed by ELISA using the monoclonal antibody DD-3B6/ 22 which recognizes a site near the γγ crosslink. There was no significant difference between initial levels in patients with acute myocardial infarction, angina or noncardiac chest pain. Increased initial levels were associated with severe congestive cardiac failure (p< 0.001) and thromboembolic events (p<0.05) but did not correlate with survival or infarct size as evaluated by peak creatine kinase level. 44% of patients developed significantly increased levels (>400 ng/ml) without explanation at some time in the 10 days following infarction. Increased levels of XLFDP are a sensitive marker of intravascular thrombosis and we postulate that occult thromboembolic disease occurred in some of these patients. In a subsequent cohort of 42 patients wtih Q-wave infarcts admitted to the ISIS 2 Trial, treatment with intravenous streptokinase (SK:1.5 x 106U) in 21 patients caused plasma levels of XLFDP to rise to variable levels (range 400 - 10,000 ng/ml) compared to no rise in those in the placebo group. Positive Dimertest titres also occurred after SK in 15 cases, but remained uniformly negative in the controls. It is not clear whether coronary thrombolysis alone can explain these elevations accompanying SK administration. Other potential sources of XLFDP which should be considered are mural thrombi, pulmonary emboli, venous thrombi and circulating XL fibrin complexes. The importance of the last is being investigated. Measurement of XLFDP requires further evaluation as a monitor of coronary thrombolysis but may play a useful role in screening patients at risk of cardiac failure or thromboembolism
Reports on the topic "Consecutive crossing"
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Warren, Robert. US Undocumented Population Continued to Fall from 2016 to 2017, and Visa Overstays Significantly Exceeded Illegal Crossings for the Seventh Consecutive Year. Center for Migration Studies, 2019. http://dx.doi.org/10.14240/cmsesy011619.
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