bluuebunny/crossref_metadata_2025_split huggingface dataset:
A Comparison of Trajectory Planning and Control Frameworks for Cooperative Autonomous Driving
Authors: Viana Icaro Bezerra , Kanchwala Husain , Ahiska Kenan , Aouf Nabil 
Published: January 2021

Abstract
This work considers the cooperative trajectory-planning problem along a double lane change scenario for autonomous driving. In this paper, we develop two frameworks to solve this problem based on distributed model predictive control (MPC). The first approach solves a single nonlinear MPC problem. The general idea is to introduce a collision cost function in the optimization problem at the planning task to achieve a smooth and bounded collision function, and thus to prevent the need to implement tight hard constraints. The second method uses a hierarchical scheme with two main units: a trajectory-planning layer based on mixed-integer quadratic program (MIQP) computes an on-line collision-free trajectory using simplified motion dynamics, and a tracking controller unit to follow the trajectory from the higher level using the nonlinear vehicle model. Connected and automated vehicles (CAVs) sharing their planned trajectories lay the foundation of the cooperative behavior. In the tests and evaluation of the proposed methodologies, matlab-carsim cosimulation is utilized. carsim provides the high-fidelity model for the multibody vehicle dynamics. matlab-carsim conjoint simulation experiments compare both approaches for a cooperative double lane change maneuver of two vehicles moving along a one-way three-lane road with obstacles.
Fixed Time Control and Synchronization for Perturbed Chaotic System Via Nonsingular Terminal Sliding Mode Method
Authors: Su Haipeng , Luo Runzi , Fu Jiaojiao , Huang Meichun 
Published: January 2021

AbstractThis paper investigates the fixed time control and synchronization of chaotic system in the presence of compound disturbances. By using the definite integration and variable substitution, we present a new fixed time stability theorem for continuous nonlinear systems. In order to offset the bad effects of the compound disturbance, some novel sliding modes are constructed to improve the robustness of the controlled system and error system. For obtaining the robust controllers, some sufficient conditions of fixed time control and synchronization of the chaotic system are proposed by means of the sliding mode control method and the given stability theorem. Numerical simulation results are presented to verify and demonstrate the effectiveness of the proposed schemes.
Absolute Nodal Coordinate Formulation-Based Decoupled-Stranded Model for Flexible Cables With Large Deformation
Authors: Zhang Yue , Guo Jiawen , Liu Yuqiang , Wei Cheng 
Published: January 2021

Abstract
The existing flexible cable dynamics model, established using the absolute nodal coordinate formulation (ANCF), suffers from the issue of strain coupling. It also does not consider the nonlinear mechanical properties inside the flexible cable and consequently provides an inaccurate description of the strain and the constitutive properties. In this study, the axial strain of the flexible cable was redescribed by constructing an equivalent rod element in order to decouple the axial strain and bending strain. Subsequently, a strain-decoupled ANCF cable element was derived. Then, by analyzing the geometry of the stranded flexible cable as well as the relative sliding and friction between the wires in the cable, the axial stiffness and bending stiffness calculation formulae were obtained and the decoupled-stranded model was established. This study, therefore, achieved an improvement upon the traditional model in describing the strain and constitutive properties. The simulation results show that the decoupled model eliminates the strain coupling effect compared with the traditional model and has the advantages of fast convergence and high accuracy. The stiffness characteristics analysis shows that the bending stiffness of the cable changes during the bending process due to the relative motion and friction between the wires. Finally, the comparative analysis shows that the accuracy of the decoupled-stranded model is very close to that of the detailed model and performs much better than the other ANCF models, and the complexity of the decoupled-stranded model is far lower than that of the detailed model.
Inhibition Effect of Thermally-Induced Fire in 21,700 Lithium-Ion Battery With Low-Pressure Twin-Fluid Water Mist
Authors: Guo Jun , Wang Haibin , He Yuanhua 
Published: January 2021

Abstract
The fire hazard of lithium-ion batteries (LIBs) poses a serious threat to their transportation and use. The purpose of this study is to investigate the efficiency of low-pressure twin-fluid water mist (TFWM) on suppressing lithium-ion battery fires. Experiments were executed to research the effect of working pressures and release stages on extinguishing the fire. Aqueous vermiculite dispersion (AVD), a commercial agent that was specifically designed to extinguish battery fires, was chosen to compare with the fire suppression performance of TFWM under the same conditions. The results indicate that the type 21,700 LIB fires could be controlled by applying the water mist within 10 s. The cooling ability at various working pressures (0.4, 0.8, 1.0, and 1.2 MPa) demonstrated an increase in inhibitory effects as the working pressure increased, and the optimal pressure was 1.2 MPa. The results further show that the extinguishing ability of the TFWM was better than the AVD agent. When the water mist was applied at the optimal working pressure, the surface temperature, flame temperature and concentration of CO reduced more significantly, compared with the AVD agent. Therefore, the TFWM shows considerable merit as a candidate to fight LIB fires.
Modeling and Optimal Control Applying the Flower Pollination Algorithm to Doubly Fed Induction Generators on a Wind Farm in a Hot Arid Climate
Authors: Chogueur Omar , Bentouba Saïd , Bourouis Mahmoud 
Published: January 2021

Abstract
In the present paper, the flower pollination algorithm (FPA) is employed for tuning the controller parameters of a doubly fed induction generator (DFIG) in a wind energy system. These parameters are then compared with those generated by the genetic algorithm (GA) and the proportional-integral (PI) (initial design) controllers. Performance analysis of the DFIG is carried out in dynamic mode in two case studies. The first case study is carried out with no failure, the second one is subject to a short circuit in the electrical network. In this latter case study, a break occurs in the rotor circuit and disconnects the DFIG from the power grid. This gives rise to an excessive current in the rotor circuit which in turn influences the converters AC/DC/AC and makes the IGBT very sensitive. The GA and the FPA are used to tune the PI controllers with the purpose of improving the quality of a power supply should electrical disturbances occur. The results show that by applying an optimal PI controller design to a DFIG using the FPA the performance of the DFIG system can be improved in the event of disturbances. When the PI controller tuning using the GA and the initial control system design is compared with the DFIG using the optimized design, a significant decrease in the overshoot of the rotor current and the DC-link voltage is observed.
Statistical Analysis of Guided Wave Imaging Algorithms Performance Illustrated by a Simple Structural Health Monitoring Configuration
Authors: Kulakovskyi Andrii , Mesnil Olivier , Chapuis Bastien , d’Almeida Oscar , Lhémery Alain 
Published: January 2021

Abstract
A guided wave-based structural health monitoring (GW-SHM) system aims at determining the integrity of a wide variety of plate-like structures such as aircraft fuselages, pipes, and fuel tanks. It is often based on a sparse grid of piezoelectric transducers for exciting and sensing GWs that under certain conditions interact with damage while propagating. In recent years, various defect imaging algorithms have been proposed for processing GWs signals and, particularly, for computing an image representing the integrity of the studied structure. The performance of the GW-SHM system highly depends on a signal processing methodology. This paper compares defect localization accuracy of the three state-of-art defect imaging algorithms (delay-and-sum, minimum variance, and excitelet) applied to an extensive simulated database of GWs propagation and GWs-defect interaction in aluminum plate under varying temperature and transducers degradation. This study is conducted in order to provide statistical inferences, essential for SHM system performance demonstration.
Force Scaling Comparison of Transport Phenomena in Proton Exchange Membrane Fuel Cell Flow Channels
Authors: Mortazavi Mehdi , Santamaria Anthony D. , Heidari Mahbod , Doyle Michael P. , Schrader Morgan A. , Rizk Elias R. 
Published: January 2021

Abstract
Liquid–gas two-phase flow in flow channels of proton exchange membrane (PEM) fuel cells has been investigated extensively in the literature; however, a comparison between the order of the magnitude of the forces occurring within the flow channels has not been documented. A comparison is relevant due to increased interest in practical active and passive water management strategies. The present study compares the magnitude of the forces experienced by liquid water residing in the flow channels. An analytical model of a 20-cm-long flow channel was analyzed, and key forces were compared in the stream-wise coordinate. Results clearly reinforce the dominance of the surface tension forces over other forces applied in the channel while also demonstrating how they change with key variables. For a cathode stoichiometric ratio of 1, the surface tension effects were calculated to be three orders of magnitude greater than the gravitational effects, the second largest force scale, for a droplet diameter of 0.1 mm. For larger droplets, this difference becomes smaller but the surface tension effects remain dominant. The results are useful for flow-field designers where water removal using complex geometry and hydrophobic coatings are being explored.
Long-term safety and efficacy of alogliptin, a DPP-4 inhibitor, in patients with type 2 diabetes: a 3-year prospective, controlled, observational study (J-BRAND Registry)
Authors: Ueki Kohjiro , Tanizawa Yukio , Nakamura Jiro , Yamada Yuichiro , Inagaki Nobuya , Watada Hirotaka , Shimomura Iichiro , Nishimura Rimei , Miyoshi Hideaki , Abiko Atsuko , Katagiri Hideki , Hayashi Michio , Shimada Akira , Naruse Keiko , Fujimoto Shimpei , Fujiwara Masazumi , Shikata Kenichi , Okada Yosuke , Araki Eiichi , Yamazaki Tsutomu , Kadowaki Takashi 
Published: January 2021

IntroductionGiven an increasing use of dipeptidyl peptidase-4 (DPP-4) inhibitors to treat patients with type 2 diabetes mellitus in the real-world setting, we conducted a prospective observational study (Japan-based Clinical Research Network for Diabetes Registry: J-BRAND Registry) to elucidate the safety and efficacy profile of long-term usage of alogliptin.Research design and methodsWe registered 5969 patients from April 2012 through September 2014, who started receiving alogliptin (group A) or other classes of oral hypoglycemic agents (OHAs; group B), and were followed for 3 years at 239 sites nationwide. Safety was the primary outcome. Symptomatic hypoglycemia, pancreatitis, skin disorders of non-extrinsic origin, severe infections, and cancer were collected as major adverse events (AEs). Efficacy assessment was the secondary outcome and included changes in hemoglobin A1c (HbA1c), fasting blood glucose, fasting insulin and urinary albumin.ResultsOf the registered, 5150 (group A: 3395 and group B: 1755) and 5096 (3358 and 1738) were included for safety and efficacy analysis, respectively. Group A patients mostly (>90%) continued to use alogliptin. In group B, biguanides were the primary agents, while DPP-4 inhibitors were added in up to ~36% of patients. The overall incidence of AEs was similar between the two groups (42.7% vs 42.2%). Kaplan-Meier analysis revealed the incidence of cancer was significantly higher in group A than in group B (7.4% vs 4.8%, p=0.040), while no significant incidence difference was observed in the individual cancer. Multivariate Cox regression analysis revealed that the imbalanced patient distribution (more elderly patients in group A than in group B), but not alogliptin usage per se, contributed to cancer development. The incidence of other major AE categories was with no between-group difference. Between-group difference was not detected, either, in the incidence of microvascular and macrovascular complications. HbA1c and fasting glucose decreased significantly at the 0.5-year visit and nearly plateaued thereafter in both groups.ConclusionsAlogliptin as a representative of DPP-4 inhibitors was safe and durably efficacious when used alone or with other OHAs for patients with type 2 diabetes in the real world setting.
Principles guiding ethical research in a collaboration to strengthen Indigenous primary healthcare in Australia: learning from experience
Authors: Bailie Jodie , Laycock Alison Frances , Conte Kathleen Parker , Matthews Veronica , Peiris David , Bailie Ross Stewart , Abimbola Seye , Passey Megan Elizabeth , Cunningham Frances Clare , Harkin Kerryn , Bainbridge Roxanne Gwendalyn 
Published: January 2021

IntroductionIndigenous communities worldwide are leading calls for all research involving Indigenous people to be underpinned by values and principles articulated by them. Many researchers are explicitly adopting these principles to guide what, where, how and when research is undertaken with Indigenous people. With critical reflection to support the implementation of such principles largely absent from published literature, this paper explores both the implementation of, and the outcomes from a set of guiding principles used in a large-scale Australian research collaboration to improve Indigenous health.MethodsIn this inductive qualitative study, we adopted a principles-focused evaluation approach. Based on interviews with 35 actors in the collaboration and a review of project documents, we generated themes that were then iteratively discussed, refined and categorised into (1) ‘strategies’—activities by which implementation of our guiding principles were recognised; (2) ‘outcomes’—results seen from implementing the principles and (3) ‘conditions’—aspects of the context that facilitated and constrained implementation of the principles.ResultsRespondents found it difficult to articulate how the guiding principles were actually implemented, and frequently referred to them as part of the fabric of the collaboration. They viewed the set of principles as mutually reinforcing, and as providing a rudder for navigating complexity and conflict. Implementation of the principles occurred through five strategies—honouring the principles; being dynamic and adaptable; sharing and dispersing leadership; collaborating purposefully and adopting a culture of mutual learning. Outcomes included increased Indigenous leadership and participation; the ability to attract principled and values-driven researchers and stakeholders, and the development of trusting and respectful relationships. The conditions that facilitated the implementation of the principles were collaborating over time; an increasing number of Indigenous researchers and taking an ‘innovation platform’ approach.ConclusionOur findings show that principles guiding collaborations are valuable in providing a focus, direction and a way of working together when they are collaboratively developed, hold genuine meaning for all members and are implemented within a culture of continuous critical reflection, learning and adaptation, with ongoing reinterpretation of the principles over time.
Ethiopian Pediatric Society Quality Improvement Initiative: a pragmatic approach to facility-based quality improvement in low-resource settings
Authors: Patterson Jacquelyn , Worku Bogale , Jones Denise , Clary Alecia , Ramaswamy Rohit , Bose Carl 
Published: January 2021

ObjectivesTo describe critical features of the Ethiopian Pediatric Society (EPS) Quality Improvement (QI) Initiative and to present formative research on mentor models.SettingGeneral and referral hospitals in the Addis Ababa area of Ethiopia.ParticipantsEighteen hospitals selected for proximity to the EPS headquarters, prior participation in a recent newborn care training cascade and minimal experience with QI.InterventionsEducation in QI in a 2-hour workshop setting followed by implementation of a facility-based QI project with the support of virtual mentorship or in-person mentorship.Primary and secondary outcome measuresPrimary outcome—QI progress, measured using an adapted Institute for Healthcare Improvement Scale; secondary outcome—contextual factors affecting QI success as measured by the Model for Understanding Success in Quality.ResultsThe dose and nature of mentoring encounters differed based on a virtual versus in-person mentoring approach. All QI teams conducted at least one large-scale change. Education of staff was the most common change implemented in both groups. We did not identify contextual factors that predicted greater QI progress.ConclusionsThe EPS QI Initiative demonstrates that education in QI paired with external mentorship can support implementation of QI in low-resource settings. This pragmatic approach to facility-based QI may be a scalable strategy for improving newborn care and outcomes. Further research is needed on the most appropriate instruments for measuring contextual factors in low/middle-income country settings.
Utility of radial endobronchial ultrasonography combined with transbronchial lung cryobiopsy in patients with diffuse parenchymal lung diseases: a multicentre prospective study
Authors: Inomata Minoru , Kuse Naoyuki , Awano Nobuyasu , Tone Mari , Yoshimura Hanako , Jo Tatsunori , Minami Jonsu , Takada Kohei , Muto Yutaka , Fujimoto Kazushi , Harada Akinori , Bae Yuan , Kumasaka Toshio , Yamakawa Hideaki , Sato Shintaro , Tobino Kazunori , Matsushima Hidekazu , Takemura Tamiko , Izumo Takehiro 
Published: January 2021

BackgroundRadial endobronchial ultrasonography (R-EBUS) has been used in conjunction with transbronchial lung cryobiopsy (TBLC) to diagnose diffuse parenchymal lung disease (DPLD) and to decrease the risk of bleeding complications. The diagnostic utility of different R-EBUS signs, however, remains unknown.ObjectivesThis study aimed to determine whether different R-EBUS signs could be used to more accurately diagnose DPLD and whether bronchial bleeding could be prevented with use of R-EBUS during TBLC.MethodEighty-seven patients with DPLD were included in this multicentre prospective study, with 49 patients undergoing R-EBUS. R-EBUS signals were characterised as displaying either dense or blizzard signs. Pathological confidence of specimens obtained from TBLC was compared between patients with dense versus blizzard signs, and severity of bronchial bleeding was determined based on whether R-EBUS was performed or not.ResultsAll patients with dense signs on R-EBUS showed consolidation on high-resolution CT (HRCT) imaging. Pathological confidence of lung specimens was significantly higher in patients with dense signs versus those with blizzard signs (p<0.01) and versus those who did not undergo R-EBUS (p<0.05). Patients who underwent TBLC with R-EBUS were more likely to experience no or mild bronchial bleeding than patients who did not undergo R-EBUS (p<0.01), with shorter procedure times (p<0.01).ConclusionsThe dense R-EBUS sign corresponded with consolidation on HRCT. High-quality lung specimens may be obtainable when the dense sign is observed on R-EBUS, and R-EBUS combined with TBLC may reduce risk of bronchial bleeding and shorten procedure times.
Culturally sensitive prescribing of common symptom management drugs
Authors: Taylor Bridget 
Published: January 2021

AimMany commonly used medicines contain, or are derived from, products which are unacceptable for religious or philosophical reasons. This paper discusses religious and non-religious dietary restrictions that have implications for prescribing in palliative care.MethodA search was undertaken of the summary of product characteristics of 18 commonly used medications in palliative care. Any animal products used in the production process were not specified. Thirty-nine pharmaceutical companies were contacted to gather specific information to address this.ResultsSome companies were unable to provide all the requested information even after 21 days. There is considerable variation regarding excipients and products involved in the manufacturing processes between different manufacturers of the same product. Within the products considered, bovine rennet was often used to extract lactose from cow’s milk; gelatine was most often, but not always, bovine; magnesium stearate was mostly non-animal in origin. If alcohol is not a matter of concern, it might appear that liquid formulations would generally be more acceptable than capsules or tablets. However, assumptions cannot be made as producers and production processes commonly change.ConclusionIt has not been possible to provide definitive information about whether animal products and alcohol are involved in the manufacturing processes of these medicines. The onus is on prescribers to sensitively enquire about any dietary restrictions individuals might have, to contact companies directly to gather specific information and be prepared to discuss the impact on symptom management if equivalent alternatives are not available.
SOLVABILITY OF THE MOORE–GIBSON–THOMPSON EQUATION WITH VISCOELASTIC MEMORY TERM AND INTEGRAL CONDITION VIA GALERKIN METHOD
Authors: BOULAARAS SALAH 
Published: January 2021

We consider the following abstract version of the Moore–Gibson–Thompson (MGT) equation: [Formula: see text] depending on the parameters [Formula: see text] [Formula: see text] [Formula: see text] and [Formula: see text] is a convex and nonnegative memory kernel. The related energy has been shown to decay exponentially by Boulaaras et al., Math. Meth. Appl. Sci. 42 (2019) 2664–2679; Lasiecka et al., Z. Angew. Math. Phys. 67 (2016) 17. Here, in this original work, the solvability of the abstract version of nonlocal mixed boundary value problem for the MGT equation via Galerkin’s method is discussed.
Notch-Regulated Dendritic Cells Restrain Inflammation-Associated Colorectal Carcinogenesis
Authors: Wang Lei , Yu Shuiliang , Chan Ernest R. , Chen Kai-Yuan , Liu Cui , Che Danian , Awadallah Amad , Myers Jay , Askew David , Huang Alex Y. , Maillard Ivan , Huang Dan , Xin Wei , Zhou Lan 
Published: January 2021

Abstract
Conventional dendritic cells (cDC) play a central role in T-cell antitumor responses. We studied the significance of Notch-regulated DC immune responses in a mouse model of colitis-associated colorectal cancer in which there is epithelial downregulation of Notch/Hes1 signaling. This defect phenocopies that caused by GMDS (GDP-mannose 4,6-dehydratase) mutation in human colorectal cancers. We found that, although wild-type immune cells restrained dysplasia progression and decreased the incidence of adenocarcinoma in chimeric mice, the immune system with Notch2 deleted in all blood lineages or in only DCs promoted inflammation-associated transformation. Notch2 signaling deficiency not only impaired cDC terminal differentiation, but also downregulated CCR7 expression, reduced DC migration, and suppressed antigen cross-presentation to CD8+ T cells. Transfer of Notch-primed DCs restrained inflammation-associated dysplasia progression. Consistent with the mouse data, we observed a correlation between infiltrating cDC1 and Notch2 signaling in human colorectal cancers and found that GMDS-mutant colorectal cancers showed decreased CCR7 expression and suppressed cDC1 signature gene expression. Suppressed cDC1 gene signature expression in human colorectal cancer was associated with a poor prognosis. In summary, our study supports an important role for Notch2 signaling in cDC1-mediated antitumor immunity and indicates that Notch2-controlled DCs restrain inflammation-associated colon cancer development in mice.