bluuebunny/crossref_metadata_2025_split huggingface dataset:
Prediction method for ionospheric clutter suppression for HFSWR
Authors: Zhe Lyu , ChangJun Yu , AiJun Liu 
Published: May 2019

The detection performance of high‐frequency surface wave radar (HFSWR) is significantly impacted by ionospheric clutter and sea clutter. In order to suppress the ionospheric clutter, a new method based on the largest Lyapunov exponent prediction algorithm is proposed in this Letter. Firstly, it is demonstrated, for the first time, that the ionospheric clutter from HFSWR is a chaotic dynamical process, and then the largest Lyapunov exponent is estimated using the Wolf algorithm. After verifying the actual data, this suppression algorithm can decrease the amplitude of the ionospheric clutter by at least 30 dB.
HD 96446: a long-period binary with a strongly magnetic He-rich primary with β Cephei pulsations
Authors: González J. F. , Briquet M. , Przybilla N. , Nieva M.-F. , De Cat P. , Saesen S. , Hubrig S. , Thoul A. , Pápics P. I. , Palaversa L. , Naef D. , Neveu-Van Malle M. , Järvinen S. , Pollard K. R. , Kilmartin P. , Mowlavi N. , Butler K. 
Published: May 2019

Aims. HD 96446 is a magnetic B2p He-strong star that has been reported to be a β Cep pulsator. We present a detailed spectroscopic analysis of this object based on an intensive observational data set obtained in a multisite campaign with the spectrographs CORALIE, FEROS, and HARPS (La Silla); UVES (Paranal); HERCULES (Mt. John Observatory); and GIRAFFE (SAAO).
Methods. Radial velocities were measured by cross-correlations and analysed to detect periodic variations. On the other hand, the mean spectrum was fit with spectral synthesis to derive atmospheric parameters and chemical abundances.
Results. From the analysis of radial velocities, HD 96446 was found to be a spectroscopic binary with a period of 799 days. The stellar companion, which contributes only ∼5% of the total flux, is an A0-type star. A frequency analysis of the radial velocities allowed us to detect two pulsational modes with periods 2.23 h and 2.66 h. The main mode is most probably a low-inclination, dipole mode (l, m) = (1, 0), and the second pulsation mode corresponds to (l, m) = (2, 2) or to a pole-on (l, m) = (3, 2) configuration. In addition to radial velocities, the main pulsation mode is evidenced through small variations in the spectral morphology (temperature variations) and the light flux. The rotation period of 23.4 d, was detected through the variation in line intensities. Chemical abundances are unevenly distributed over the stellar surface, with helium concentrated at the negative magnetic pole and most metals strengthened at lower latitudes. The mean chemical abundance of helium is strongly abnormal, reaching a value of 0.60 (number fraction).
Influence of Patientʼs Age on the Outcome of Vaginal and Laparoscopic Procedures in Urogynaecology
Authors: Joukhadar Ralf , Radosa Julia , Paulus Viola , Hamza Amr , Solomayer Erich Franz , Herr Daniel , Wöckel Achim , Baum Sascha 
Published: May 2019

Abstract
Introduction In the treatment of prolapse and incontinence, the choice of surgical procedure often depends not only on the clinical findings but also on the age of the patient. Uncertainty exists at present regarding the effect of patient age on treatment outcomes for both vaginal and laparoscopic procedures. The aim of this study is therefore to compare both the anatomical outcome after prolapse surgery and the functional outcome after incontinence surgery in the context of the treatment of stress urinary incontinence in older and younger patients.
Patients/Methods This is a retrospective single-centre study conducted at a university site. Over the study period, a total of 407 women underwent surgery, 278 of whom were < 70 and 129 ≥ 70 years of age. They were assigned to one of three treatment groups (prolapse surgery, incontinence surgery or a combination of both types of surgery) and were then subjected to statistical analysis after assessment of the anatomical and functional outcome after 3 – 6 months.
Results The most common form of prolapse among the 407 evaluated patients was in the anterior and middle compartment, with a higher degree of severity being diagnosed in the older patients. Grade 4 prolapse according to the Baden–Walker system was thus present in the anterior compartment in 15.6 vs. 28.8% (p = 0.033) and in the middle compartment in 5.7 vs. 23.7% (p < 0.001) of cases. Younger women underwent vaginal mesh implantation less frequently and laparoscopic sacropexy more frequently for this overall. The proportion of cases of combined prolapse and incontinence surgery was the same in both groups. Overall, high success rates were observed in both younger and older patients following prolapse and incontinence surgery. These rates were 93.5 vs. 84.8% (p = 0.204) after prolapse surgery and 92.8 vs. 84.2% (p = 0.261) after incontinence surgery. A significant disadvantage for the older patients was the persistence of stress urinary incontinence after prolapse surgery alone (19.6 vs. 50%, p = 0.030) and the rate of occult (de novo) stress urinary incontinence (7.4 vs. 20%, p = 0.030).
Conclusion Our data show that both pelvic organ prolapse and stress urinary incontinence can be treated with surgery with good results in women aged ≥ 70 years. It was thus possible to show for the first time in a large patient population that older women should not be denied appropriate surgery but can be offered the same range of surgical options as younger patients.
Frequency of Secondary Dislocations of Initially non Displaced and Minimally Displaced Fractures of the Lateral Humeral Condyle in Children – Surveillance of a Treatment Algorithm
Authors: Janzen Simeon , von Kalle Thekla , Wirth Thomas , Fernandez Fernandez Francisco 
Published: May 2019

Abstract
Aim of the Study The treatment of undisplaced fractures of the lateral humeral condyle is conservative. However, it is problematic that it is not possible to differentiate between a stable and an unstable, non-displaced fracture. A pragmatic approach is to X-ray the elbow without a cast 5 days after trauma and to compare those images with the initial ones. If there is a central increase of dislocation, then there is an indication of an unstable fracture. The dislocation can also be indicated by a translational movement, which is best observed in the border area. The aim of the study was to retrospectively determine the incidence of secondary dislocations of initially undisplaced and minimally dislocated fractures of the lateral humeral condyle in infants between 2010 and 2015.
Methods We performed a retrospective, non-randomized analysis of 75 children with initially undisplaced and minimally displaced fractures of the lateral humeral condyle between 2010 and 2015. The strategy for the evaluation of a stable and an unstable fracture of the lateral humeral condyle was carried out by means of an X-ray without a cast 5 days after trauma. Further radiological controls were performed after 14 days, 4 weeks and after 10 to 12 weeks in operated children.
Results Seven initially undisplaced and minimally dislocated fractures (9,3%) showed a secondary dislocation 5 days after trauma when a radiological control without a cast was performed. At the control 14 days after trauma there was no further secondary dislocation. The immobilization took place in an upper arm cast for a period of 4 weeks.
Conclusion 90% of all non-dislocated fractures of the lateral humeral condyle can be treated conservatively. It is important to find out which about 10% of children will experience a secondary dislocation safely and effectively. It has been shown that the strategy for the evaluation of a stable and an unstable fracture of the lateral humeral condyle by means of a radiological control after 5 days without a cast can be effective and cost-saving. With a high degree of certainty, the unstable fracture can be detected at the radiological control 5 days after trauma. If, after 5 days, the radiological control reveals unsure finding regarding the dislocation, it is advisable to recheck the fracture in the second radiological control after 14 days.
Complications of Percutaneous Renal Biopsy
Authors: Bakdash Kenaz , Schramm Kristofer M. , Annam Aparna , Brown Matthew , Kondo Kimi , Lindquist Jonathan D. 
Published: May 2019

AbstractPercutaneous renal biopsy is widely used for diagnosis, prognosis, and management of nephropathies. Complications may arise after renal biopsy, most commonly in the form of bleeding. Efforts should be taken to optimize modifiable risk factors such as hypertension, thrombocytopenia, and coagulopathy prior to the procedure. Unmodifiable risk factors such as poor renal function, gender, and underlying histologic diagnosis may be used to identify high-risk patients. Delayed presentation of bleeding complications is common, and close clinical follow-up is crucial.
Anterior Cord Syndrome after Embolization for Malignant Hemoptysis
Authors: Padgett Max , Abi-Jaoudeh Nadine , Benn Bryan S. , Rahimian Ramin , Nelson Kari 
Published: May 2019

AbstractInterventional radiology plays an integral role in the management of massive and recurrent submassive hemoptysis. Risks of bronchial artery embolization (BAE) are well described and include spinal ischemia and paralysis, most often related to nontarget embolization of the artery of Adamkiewicz or other large radiculomedullary artery supplying the anterior spinal artery. There is increasing literature regarding spinal infarction following BAE when arterial supply to the spinal cord was not evident. The existence of unrecognized patient comorbidities may further contribute to procedural risks.
Pneumodissection during Percutaneous Renal Ablation Resulting in Air Embolism: Percutaneous Management and a Review of the Literature
Authors: Arif Kamil , Gunn Andrew J. 
Published: May 2019

AbstractPercutaneous renal ablation is a nephron-sparing approach for selected patients with renal cell carcinoma. Common complications include hemorrhage, injury to the urinary collecting system, and abscess formation. The purpose of this article is to present a case of vascular air embolism as a complication of pneumodissection performed during percutaneous ablation of renal cell carcinoma, discuss its successful percutaneous management, review common complications of renal ablation, and outline steps physicians can take to lessen these complications.
Understanding CancelRx: Results of End-to-End Functional Testing, Proactive Risk Assessment, and Pilot Implementation
Authors: Pitts Samantha I. , Barasch Noah , Maslen Andrew T. , Thomas Bridgette A. , Dorissaint Leonard P. , Decker Krista G. , Kazi Sadaf , Yang Yushi , Chen Allen R. 
Published: May 2019

Background CancelRx allows prescribers to send electronic cancellation messages to pharmacies when medications are discontinued. Little is known about its functionality and impact on clinical workflows.
Objectives To understand CancelRx functionality, its potential impact on workflows and medication safety risks, and to develop mitigating strategies for risks introduced by implementation.
Methods We conducted direct observations and semi-structured interviews to develop CancelRx use cases and assessed CancelRx in an end-to-end test environment, proactive risk assessment, and pilot implementation from April 16 to July 15, 2018.
Results E-cancellations were sent upon discontinuation of e-prescriptions written within the electronic health record (EHR), but not other medications (e.g., printed prescriptions) and could be initiated by nonprescribers. In our proactive risk assessment, CancelRx implementation eliminated five of seven failure modes in outpatient prescribing to Johns Hopkins pharmacies, but introduced new risks, including (1) failure to act if an e-cancellation was not sent or was unsuccessful; (2) failure to cancel all prescriptions for a medication; (3) errors in manual matching; and (4) erroneous medication cancellations. We identified potential mitigation strategies for these risks. During pilot implementation, 92.4% (428/463) of e-cancellations had confirmed approval by the receiving pharmacy, while 4.5% (21/463) were denied, and 3.0% (14/463) had no e-cancellation response. Among e-cancellations received by the pilot pharmacy, 1.7% (7/408) required manual matching by pharmacy staff. Based on performance in testing, 73.4% (340/463) of completed e-cancellations would be expected to generate an in-basket message, including 21 (6.2%) denials and 319/340 (93.8%) approvals with a note from the pharmacy.
Conclusion CancelRx is an important functionality with the potential to decrease adverse events due to medication errors. However, changes in implementation in our EHR and pharmacy software and enhancements in the CancelRx standard are needed to maximize safety and usability. Further studies are needed to evaluate the impact of e-cancellation on medication safety.
Research and Implementation of Key Techniques for Indoor Movement Object Trajectory Prediction
Authors: Zhang Ping , Jiang Qianqian , Zhang Ruilin , Li Bo 
Published: May 2019

Abstract
With the popularity of smart mobile terminals and Wi-Fi signals, people’s demand for indoor location services has also increased. However, in the indoor space, GPS positioning is inaccurate, and the Wi-Fi signal may also have signal instability even no signal in some areas. This paper proposes a prediction method based on improved HMM model combined with historical trajectory clustering. The experimental results on UJIIndoorLoc data set show that the predicting trajectories can greatly improve the real-time performance of location services and the proposed method has great improvement in accuracy and scalability comparing with another model.
Design for Guidance Method of UAV Autonomous Landing on Mobile Platform Based on Prediction of Intersection Points
Authors: Jiang Jun , Qi Guodong , Huang Guoxian 
Published: May 2019

Abstract
The development of the technology for UVAs (Unmanned Aerial Vehicle) autonomous landing on mobile platform is introduced in this article. And the existing problems of UAVs autonomous landing on mobile platforms are also analysed. In order to solve these problems, a guidance method of UAV autonomous landing on mobile platform based on prediction of intersection points is proposed in this paper. In this method, the intersection point of the trajectory of UAV and the trajectory of the mobile platform is predicted based on the speed plan for UAV and the motion state of mobile platform. Then, the UAV will be guided to the intersection point by proportional guidance law. And at each time of the landing of the UAV, the location of the intersection point will be corrected in real time. In order to verify this method, a mathematical simulation experiment was designed. The result of this experiment shows that UAVs are able to land more accurately on the mobile platform with less overload using this method.
Vision-Based Hazard Detection with End-to-end Spatiotemporal Networks for Planetary Landing
Authors: Huang Cheng , Wang Hongmei 
Published: May 2019

Abstract
Hazard detection is the key technique for autonomous landing during a planetary exploration mission. This paper proposed an end-to-end spatiotemporal network to detect all hazards in the image sequences captured by optical camera. The spatial stream processes the colour image sequences and the temporal one learns features from optical flow image sequences. The spatial features and temporal features are fused by the proposed metric fusion method, and then the spatiotemporal features become more discriminative through triplet loss. A hazard map can ultimately be obtained in the testing phase after processing on the full-size image sequences. The evaluation results prove the effectiveness of the proposed network, and the testing results show the feasibility of practical application.
Path Planning of Unmanned Air Vehicles Relay Communication Based on Lowest Power Loss
Authors: Xiao Ruiying , Yang Fan , Dong Zhenghong 
Published: May 2019

Abstract
Unmanned aerial vehicle (UAV) relay communication is an important means to realize long-range wireless communication, where the lowest power loss could prolong the air residence time and increase the duration of the relay communication of UAV. In this paper, we present a UAV relay communication path planning based on the minimum encircling circle algorithm for the UAV working at the lowest power loss. We acquired the minimum radius of UAV relay communication based on for moving platform positions, and then determined the 3D position and flight path of UAV. Compared with the centroid enclosing circle algorithm, our simulation can reduce the signal transmitting power, realize the path planning of UAV relay communication under the lowest power loss.
Research on Influence of Microburst on Ballistic Characteristics of Rockets
Authors: Jianwei Chen , Liangming Wang , Zijie Li 
Published: May 2019

Abstract
In order to study the influence of microburst on the ballistic characteristics of rockets, an engineering model was established by using the vortex ring method based on the basic principle of hydrodynamics and the theory of the exterior ballistic. The wind field model is combined with the six-degree-of-freedom rigid-body ballistic model of rockets. This study examined a kind of empennage-rocket whose flight process was influenced by a microburst. The simulation results show that the microburst model based on the vortex method is simple and the three-dimensional characteristics are good, which can describe the main wind field characteristics of the microburst in a certain extent. Meanwhile, the microburst affects the ballistic characteristics of rockets such as the trajectory, velocity and angular motion. The extent of the effect is concerned with the vertical wind velocity along the central axis and the vortex ring radius of the microburst model.
Study on Properties of Interlayer Short Fiber Reinforced Carbon Fiber/Epoxy Composite Laminates
Authors: Liu Weiwei , Li Weiwei , Ma Chengyan , Wang Shuai 
Published: May 2019

Abstract
In order to improve the interlaminar delamination resistance of the carbon-fiber/epoxy composite laminates, short fibers were applied between layers. The effects of length, density, type of short fiber on mode I fracture toughness(GIC) and mode II fracture toughness (GIIC) were investigated by three-factor and four-level orthogonal test combined with range analysis and scanning electron microscope observation. Finally, parameter optimization and test verification. The results show that the order of factors influencing GIC and GIIC within the selected parameters are: fiber type, fiber density and fiber length. When Kevlar fibers with a length of 11mm and a density of 20g·m-2 were laid between layers, the GIC was 451.4J·m-2, which was 82.2% higher than that of the specimens without short fibers in the layers. Kevlar fibers with a length of 11 mm and a density of 5g·m-2 were layered with a GIIC of 2034.3 J·m-2, which was increased by 240.5% compared with the specimens without short fibers in the interlayer.
Contrasting responses in dissolved organic carbon to extreme climate events from adjacent boreal landscapes in Northern Sweden
Authors: Tiwari Tejshree , Sponseller Ryan A , Laudon Hjalmar 
Published: May 2019

Abstract
The ongoing pressures of climate change, as expressed by the increased intensity, duration, and frequency of temperature and precipitation events, threatens the storage of carbon in northern latitudes. One key concern is how these events will affect the production, mobilization, and export of dissolved organic carbon (DOC), the main form of aquatic carbon export in these regions. In this study, we retrospectively show contrasting effects of climate extremes over 23 years on two adjacent boreal catchments, one dominated by forest cover and the other draining a mire (wetland), despite experiencing the same extreme climate events. During the peak snowmelt, DOC concentrations ranged from 20 to 33 mg l−1 in the forest catchment and 10–28 mg l−1 in the mire catchment respectively, highlighting large inter-annual variation in the springtime hydrologic C export at both sites. We used climate and discharge variables to predict this variation, and found that DOC from the forested catchment, which is derived largely from riparian soils, had the highest concentrations following cold summers, dry autumns, and winters with high precipitation. By contrast, in the mire outlet, where DOC is primarily derived from decomposing peat, the highest DOC concentrations in the spring followed cold/dry winters and dry summers. Our results indicate that processes regulating stream DOC concentrations during spring in both catchments were dependent on both temperature and precipitation in multiple seasons. Together, these patterns suggest that DOC responses to climatic extremes are complex and generate variable patterns in springtime concentrations that are strongly dependent upon landscape context.
Death by a Thousand Cuts: Stress Exposure and Black–White Disparities in Physiological Functioning in Late Life
Authors: Boen Courtney 
Published: May 2019

Abstract

Objectives
This paper investigates Black–White differences in stress—including diverse measures of chronic, acute, discrimination-related, and cumulative stress exposure—and examines whether race differences in these stress measures mediate Black–White disparities in C-reactive protein (CRP) and metabolic dysregulation in later life.

Methods
Using data from the Health and Retirement Study (HRS) (2004–2012), this study uses stepwise ordinary least squares (OLS) regression models to examine the prospective associations between multiple stressors—including traumatic and stressful life events, financial strain, chronic stress, everyday and major life discrimination, and measures of cumulative stress burden—and CRP and metabolic dysregulation. Mediation analyses assessed the contribution of stress exposure to Black–White disparities in the outcomes.

Results
Blacks experienced more stress than Whites across domains of stress, and stress exposure was strongly associated with CRP and metabolic dysregulation. Race differences in financial strain, everyday and major life discrimination, and cumulative stress burden mediated Black–White gaps in the outcomes, with measures of cumulative stress burden mediating the greatest proportion of the racial disparities.

Discussion
The “thousand cuts” that Blacks experience from their cumulative stress exposure across domains of social life throughout the life course accelerate their physiological deterioration relative to Whites and play a critical role in racial health disparities at older ages.