bluuebunny/crossref_metadata_2025_split huggingface dataset:
Acanthopanax senticosus Induces Vasorelaxation via Endothelial Nitric Oxide-Dependent and -Independent Pathways
Authors: Shiokawa Yayoi , Miyauchi-Wakuda Shino , Kagota Satomi , Maruyama-Fumoto Kana , Yamada Shizuo , Shinozuka Kazumasa 
Published: July 2019

AbstractAlthough Acanthopanax senticosus root extract (ASRE), a functional food used in Japan, improves peripheral blood circulation and exerts vasorelaxant effects in rats under healthy conditions, the underlying mechanisms currently remain unclear. Therefore, we investigated the mechanisms responsible for ASRE-induced relaxation in isolated thoracic aortas using organ bath techniques and examined whether ASRE affects systemic and peripheral circulation using a photoplethysmographic tail-cuff system and noncontact laser tissue blood flow meter in Wistar rats. Similar to acetylcholine (ACh), ASRE induced dose-dependent relaxation in aortas pre-contracted with phenylephrine; however, in contrast to ACh, ASRE-induced relaxation was partially inhibited by treatments with antagonists of nitric oxide (NO) synthase and soluble guanylyl cyclase as well as by endothelium removal. Contractile responses to phenylephrine or potassium chloride were observed in the presence of ASRE. The oral administration of ASRE (900 mg/kg/d for 1 wk) decreased systolic blood pressure in rats 3 h after the treatment and did not affect heart rate, tail blood flow, mass, or velocity; this decreasing effect was not observed on day 2. A 1-wk treatment with ASRE did not affect vasorelaxation in response to ASRE. These results demonstrate that ASRE induces vasorelaxation via endothelial NO production and an NO-independent pathway in rats. Based on these findings, positive impacts of ASRE on blood pressure and peripheral blood circulation cannot be expected under healthy conditions as the systemic effects of ASRE are temporary. Instead, caution is needed to prevent the occurrence of side effects (i.e., orthostatic dizziness) at the beginning of ASRE dosing.
A Prospective Analysis of Derangement of Coagulation Profile in Adult and Pediatric Age Group in Moderate-to-Severe Traumatic Brain Injury
Authors: Gandhi Swarup Sohan , Mann Manish , Jain Shashikant , Meena Ugan Singh , Sinha Virendra Deo 
Published: July 2019

Abstract
Background and Aim of Study Coagulopathy is a common occurrence following traumatic brain injury (TBI). Various studies have reported the incidence and risk factors of coagulopathy and their correlation with poor outcome in adult as well as pediatric age group. In our study, we aim to analyze trauma-induced coagulopathy in adult and pediatric patients.
Methods Adult (> 18 years) and pediatric (< 18 years) patients of TBI admitted in the intensive care unit of a trauma center of a tertiary care center had been studied from August 2015 to March 2018. Patients were further subdivided into moderate and severe TBI based on Glasgow Coma Scale (GCS) of 9 to 12 and < 9, respectively. Coagulation profile (prothrombin time [PT], activated partial thromboplastin time [APTT], thrombin time, fibrinogen, and D-dimer) and arterial blood gas (ABG) analysis were done on day of admission and on days 3 and 7. Coagulation profiles were analyzed in both the age groups, and risk factors were studied and correlated with the mortality and morbidity based on the Glasgow outcome score.
Results Two hundred patients including 143 adults and 57 pediatric patients were included. Mean age among the adult and pediatric population was 31.51 ± 16.83 and 11.5 ± 5.90 years, respectively. In adults, 96 (83.62%) out of 116 in severe TBI group and 20 (74.07%) out of 27 in moderate TBI group developed coagulopathy, and in pediatric age group, 14 (70%) out of 20 in moderate TBI and 30 (81.08%) out of 37 in severe TBI developed coagulopathy. Midline shift was significantly associated with coagulopathy in both the age groups (p value < 0.039). Mortality was not significantly different in patients with coagulopathy between the age groups, but improved status as per the Glasgow outcome score was more in pediatric age group.
Conclusion The development of coagulopathy is a frequent complication in patients with moderate to severe TBI in both age groups. Even though it is not closely associated with death in this study, it may be regarded as a marker of injury severity.
Empiema del Muñón Ureteral: Secretos Para un Buen Diagnóstico
Authors: Díaz Telli Federico , Mendes Eduardo Nicolás , Trentacoste Juan Francisco , Rosenvasser Jonathan , Padin Carlos Juan , Perotti Juan Pablo 
Published: July 2019

El muñón ureteral es el segmento de uréter remanente posterior a una nefrectomía, que puede, ocasionalmente, dar origen a un cuadro sintomático infeccioso poco frecuente, conocido como empiema del muñón ureteral (EMU). El mismo suele atribuirse a otra patología por desconocimiento médico y no es reconocido hasta que el cuadro clínico avanza significativamente o se realiza la exploración quirúrgica.Los muñones ureterales que se encontraban sanos en la cirugía inicial no suelen desarrollar patología. Por el contrario, los uréteres obstruidos, crónicamente infectados o asociados a litiasis o reflujo distal, son los que se encuentran en riesgo de desarrollar complicaciones futuras.En esta revisión, se repasa la literatura y se presentan casos de pacientes con antecedentes de nefrectomía que por diferentes causas transcurrieron con empiema en el muñón ureteral, con el fin de analizar las posibles causas y factores predisponentes de la patología, describir los hallazgos radiológicos en los diferentes métodos diagnósticos y poder reconocer las posibles complicaciones para su correcto manejo terapéutico.Las infecciones urinarias a repetición son útiles para sospechar la presencia de EMU. Ellas se deben al reflujo urinario o disfunción en el vaciamiento del uréter remanente, con estasis e infección del mismo. Por lo tanto, en pacientes con antecedentes de nefrectomía que presentan dolor abdominal difuso, fiebre y antecedentes de infecciones urinarias a repetición, es necesario sospechar empiema del muñón ureteral para poder realizar un correcto análisis imagenológico y posterior tratamiento.
Orbital Schwannoma: Case Report and Review
Authors: Caramanti Ricardo Lourenço , Goes Mário José , Chaddad Feres , Meguins Lucas Crociati , Moraes Dionei Freitas de , Aprígio Raysa Moreira , Calzolari Sérgio Ivo , Rocha Carlos Eduardo , Silva Sebastião Carlos da 
Published: July 2019

AbstractOrbital schwannomas are rare, presenting a rate of incidence between 1 and 5% of all orbital lesions. Their most common clinical symptoms are promoted by mass effect, such as orbital pain and proptosis. The best complementary exam is the magnetic resonance imaging (MRI), which shows low signal in T1, high signal in T2, and heterogeneous contrast enhancement. The treatment of choice is surgical, with adjuvant radiotherapy if complete resection is not possible. We report the case of a 24-year-old male patient with orbital pain and proptosis, without previous history of disease. The MRI showed a superior orbital lesion compatible with schwannoma, which was confirmed by biopsy after complete resection using a fronto-orbital approach.
Penetrating Injury Due to Bicycle Brake Handle Causing Middle Cerebral Artery Infarct
Authors: Sasidharan Gopalakrishnan Madhavan , Chauhan Abhishek 
Published: July 2019

AbstractAn 8-year-old boy was brought to the emergency room with history of fall from a bicycle he was riding. On examination, he had a swelling in the left orbit with a small laceration under the medial aspect of the left eyebrow. The Glasgow coma scale was E2M5V2. An emergency computed tomographic (CT) scan showed infarct causing mass effect in the territory of the left middle cerebral artery. CT angiogram showed that a branch of the middle cerebral artery was occluded at the end of track traversed by the bicycle brake handle. The patient underwent decompressive craniectomy. Initial methylmethacrylate cranioplasty had to be removed due to infection. Later, the patient underwent titanium cranioplasty. At last follow-up, he was going to school. Hemiparesis persisted. Children are vulnerable to penetrating injury by the relatively sharp brake handle when they fall from an adult bicycle. Previous reports include fatal injury by similar mechanism. In this case, it caused injury to the middle cerebral artery without causing bleed. Bicycle manufacturers could be advised to make the vehicle safer for children by twisting the end of the brake handle.
Feeding experiment using uniformly 13C-labeled α-linolenic acid supports the involvement of the decarboxylation mechanism to produce cis-jasmone in Lasiodiplodia theobromae
Authors: Matsui Ryo , Takiguchi Kisumi , Matsuda Kazuhiko , Takahashi Kosaku , Matsuura Hideyuki 
Published: July 2019

ABSTRACT
In our previous report, it was found that Lasiodiplodia theobromae produced cis-jasmone via partially utilizing the biosynthetic pathway of JA. A feeding experiment using uniformly 13C-labeled α-linolenic acid, which was added to the culture media of the fungus, strongly supported that the fungus produced CJ via the decarboxylation step of the biosynthetic pathway.
Active vibration control of planetary gears by pole placement
Authors: Olanipekun K A , Rustighi E , Ferguson N S 
Published: July 2019

Abstract
This numerical study focuses on the assignment of poles to a planetary gear train to avoid resonance, which can cause the failure of the system. The control strategy is output feedback, which involves feeding back the displacement and velocity to achieve active stiffness and damping respectively. The reverse process was considered. This occurs when the predicted control gains were assigned by the actuators, which were placed on the translational directions of either the carrier or the sun gear bearing mounted on the shaft. In addition, the closed-loop poles were assigned in the case whereby the actuators were positioned in the translational directions of either the carrier or the sun gear. The active control was considered using both the fixed and rotating frames of reference at a carrier speed of 100 rpm. Numerical examples are presented using both reference frames with the sensors and actuators collocated. The results show that the poles of the modes with lower frequencies, which are predominantly translational modes, can be shifted while the poles of the higher modes, which are predominantly rotational remain unchanged.
Joint state/input estimation with a Fourier dictionary for the input representation: effect of spectral leakage
Authors: Kirchner M , Croes J , Desmet W 
Published: July 2019

Abstract
The compressive sensing-moving horizon estimator (CS-MHE) is an approach for joint state/input estimation. It integrates compressive sensing principles into a moving horizon estimator, enabling to exploit shape functions to model an input, resulting in better observability and wider input bandwidth in comparison to other input models. With the final aim of using the CS-MHE for the estimation of forces and torques in rotating machinery which exhibit some form of periodicity, the authors have recently investigated Fourier shape functions. A first experimental validation showed very accurate estimation under the hypothesis of no spectral leakage, i.e., the MHE window, the sampling rate and the Fourier dictionary match a known input periodicity, with the input consisting of few sinusoidal components. This paper discusses the problem of spectral leakage that can result if the MHE window does not match the signal periodicity. In particular, we show how to remove the link between the MHE window and a Fourier dictionary, we discuss how the autocorrelation can be employed to detect the periodicity and we list further possible alternatives to enhance a sparse solution. The discussion is supported by numerical and experimental investigations.
Static and Random Vibration Analyses of a University CubeSat Project
Authors: Barsoum George I. , Ibrahim Hesham H. , Fawzy Mina A. 
Published: July 2019

Abstract
This work presents hands on experience of the configuration process and strength analyses of a student’s CubeSat project at the German University in Cairo. The static and dynamic performance of the primary structure, during launching phase, are investigated and checked against the strength requirements in addition to making sure that stiffness constraints imposed by the P-POD and the candidate launchers are met. The static response of the primary structure is performed using ANSYS Finite Element Software by exposing the structure to the maximum quasi static launch load in each of three flight directions separately. Modal analysis results are presented in order to check the compliance of the longitudinal and lateral natural frequencies, of the proposed model, with the launchers requirements. In addition, random vibration response is performed using frequency domain analysis, assuming that the structure will be subjected to launch random vibration loads in all directions. Finally, fatigue life analysis is presented in order to ensure that primary structure will safely survive the launching mechanical environments.
A probabilistic framework for online structural health monitoring: active learning from machining data streams
Authors: Bull L A , Worden K , Rogers T J , Wickramarachchi C , Cross E J , McLeay T , Leahy W , Dervilis N 
Published: July 2019

Abstract
A critical issue for data-based engineering is a lack of descriptive labels for the measured data. For many engineering systems, these labels are costly and/or impractical to obtain, and as a result, conventional supervised learning is not feasible. This paper suggests a probabilistic framework for the investigation and labelling of engineering datasets; specifically, acoustic emission data streams recorded online from a turning machine. Two alternative probabilistic measures are suggested to select the most informative observations. During machining operations, these data would then be investigated and annotated by an engineer, in order to maximise the classification performance of a statistical model used to predict tool wear.
Optimal design of inerter-integrated vibration absorbers for seismic retrofitting of a high-rise building in Colombia
Authors: Li Yuan , Lombardi Luca , Luca Flavia De , Farbiarz Yosef , Blandon John Jairo , Lara Luis Augusto , Rendon Juan Felipe , Jiang Jason Zheng , Neild Simon 
Published: July 2019

Abstract
Retrofitting of existing buildings with seismic protection devices is an important approach which is commonly adopted by the civil engineering community. This paper investigates the potential of inerter-integrated seismic vibration absorber for building structures. A real case study of a high-rise building in Colombia is considered herein to demonstrate the effectiveness of the proposed device. An inerter generates a force proportional to the relative acceleration between its two terminals and it fundamentally enlarges the range of realisable passive mechanical impedances. In this work, an interter-integrated device is modelled into the open-source structural engineering software OpenSees and implemented into a simplified two-dimensional (2D) version of the Colombian test-bed structure. The performances of the structure retrofitted with the proposed absorber are compared to those of the same structure retrofitted with a traditional damper device, a more classical retrofitting. This preliminary work demonstrates the effectiveness of the inerter-integrated retrofitting strategies considering the non-structural damage caused by a moderate earthquake. It has been found that with an optimal inerter-integrated device, the maximum inter-storey drift of the building will be reduced by 45.64% comparing with the structure without any retrofitting, which is 20.8% further reduction comparing with the structure retrofitted with an optimal damper.
Random error propagation and uncertainty analysis in the dynamic characterization of Tilting Pad Journal Bearings
Authors: Barsanti M , Ciulli E , Forte P 
Published: July 2019

Abstract
In this work a new statistical method for the determination of the dynamic coefficients of Tilting Pad Journal Bearings is described. The method is applied to the results obtained testing a 5 pads tilting pad journal bearing with 280 mm diameter. Tests were performed on an advanced experimental apparatus specifically realized for investigations on large size high performance bearings for turbomachinery. The linear coefficient identification procedure is based on the dynamic measurement of forces, accelerations and relative displacements of rotor and bearing, as function of excitation frequency for different operating conditions. The postprocessing of the dynamic data is performed in the frequency domain using the Fast Fourier Transform. Along with a description of the experimental test and identification procedure, this paper presents a least-square minimization technique for determining the dynamic coefficients and a bootstrap statistical technique for estimating their confidence intervals.
An adaptive MOR method for vibro-acoustic analysis of dynamic systems with viscoelastic damping
Authors: Xie Xiang , Zheng Hui , Jonckheere Stijn , Desmet Wim 
Published: July 2019

Abstract
Viscoelastic materials have the capability of dissipating vibrational energy which makes them very effective in the passive control of structural vibration and noise radiation. Efficient modeling-and simulation strategies for vibro-acoustic systems with these frequency-dependent damping materials are necessary. One way of doing that is to utilize the finite element (FE) method supported by a damping model that describes the frequency-dependency of the complex elastic modulus. However, in many applications, very large-scale FE models are required to obtain reliable predictions, which makes full-order system evaluation often intractable. Model order reduction (MOR), however, cannot be directly applied to models including viscoelastic materials due to the frequency-dependent property which exactly makes that the equations of motion are not of a standard second-order form as that for regular FE models. In this paper, a transformation technique based on Taylor’s theorem is introduced to treat the non-standard form of the equations of motion. After transforming the problem into a second-order system equation with an associated remainder term, an adaptive MOR procedure is applied to reduce the computational complexity of the vibro-acoustic systems. A numerical example is provided to demonstrate the simplicity and efficiency of the proposed approach.
Structural Damping by Layers of Fibrous Media Applied to a Periodically-Constrained Vibrating Panel
Authors: Xue Yutong , Stuart Bolton J. , Herdtle Thomas , Lee Seungkyu , Gerdes Ronald W. 
Published: July 2019

Abstract
It has recently been demonstrated that layers of fibrous, “acoustical” material can effectively damp structural vibration in the sub-critical frequency range. In that frequency range, the acoustical near-field of a panel consists of oscillatory flow oriented primarily parallel with the panel surface. When a fibrous layer occupies that region, energy is dissipated by the viscous interaction of the near-field and the fibrous medium, and the result is a damping of the panel motion. Previously, the damping effect has been demonstrated to occur for line-driven, infinite panels and panels with isolated constraints. In this article, the focus is instead on periodically-constrained panels driven into motion by a convective pressure distribution. The constraints are allowed to have translational and rotational inertias and stiffnesses. This arrangement is intended to represent a very simple model of an aircraft fuselage structure. By considering the power flows in this system, it is possible to compute an equivalent loss factor, and then to identify the fibrous layer macroscopic parameters that result in optimal damping at a given mass per unit area. Finally, given that information, it is possible to identify the microstructural details, e.g., fiber size, that would be required to achieve that damping in practice.
Modelling the vibrational field of a single-layered ground containing a buried object
Authors: Duval G , Laulagnet B 
Published: July 2019

Abstract
Better understanding and accurate representation of the vibrational field propagated through the ground is a major challenge in the industrial field. In particular, interactions between vibrating surface objects and elements buried in the soil are poorly understood. This article presents an analytical model of the vibrational field of a single-layered soil solicited at its surface by an non deformable piston and containing a passive flat plate. It offers an original approach to the problem, using coupling between plates and ground to investigate how the surface velocity field is modified by the presence of an object in the soil. Examples of numerical simulations are provided, and possible extensions to the model are briefly discussed to underline its versatility and its use in potential future studies.
A novel approach to solve eigenvalue and forced response problems in waveguide theory by means of bi-orthogonality relations
Authors: Ledet L S , Sorokin S V 
Published: July 2019

Abstract
In this paper recent advances on solving challenging problems in dynamics of multimodal symmetric waveguides (having identical properties of positive/negative going waves) using bi-orthogonality are summarised. It has already been shown by the authors that bi-orthogonality, valid for arbitrarily complicated unbounded symmetric waveguides, greatly facilitates analysis of their forced response in any excitation conditions. Recent findings have shown that bi-orthogonality is a powerful tool also for bounded waveguides and by direct use it resolves the classical Boundary Integral Equations (BIE) into a set of individual relations between modal amplitudes at the boundaries. Moreover, bi-orthogonality permits to uniquely identify special sets of boundary conditions for which the eigenfrequency spectra may be found directly from the dispersion diagrams. These solutions are available simply by drawing horizontal lines specifying an inverse of the wave length of interest in the (Ω, k)-dispersion diagram and so the eigenfrequency spectrum may be read directly as intersections of these lines with dispersion curves. This paper therefore serves to promote this method, discuss applications, new possibilities, physical interpretation and its generalisation to a broader class of waveguide problems.
A new method utilizing smart meter data for identifying the existence of air conditioning in residential homes
Authors: Chen Mo , Sanders Kelly T , Ban-Weiss George A 
Published: July 2019

Abstract
Climate change, urbanization, and economic growth are expected to drive increases in the installation of new air conditioners, as well as increases in utilization of existing air conditioning (AC) units, in the coming decades. This growth will provide challenges for a diversity of stakeholders, from grid operators charged with maintaining a reliable and cost-effective power system, to low-income communities that may struggle to afford increased electricity costs. Despite the importance of building a quantitative understanding of trends in existing and future AC usage, methods to estimate AC penetration with high spatial and temporal resolution are lacking. In this study we develop a new classification method to characterize AC penetration patterns with unprecedented spatiotemporal resolution (i.e. at the census tract level), using the Greater Los Angeles Area as a case study. The method utilizes smart meter data records from 180 476 households over two years, along with local ambient temperature records. When spatially aggregated, the overall AC penetration rate of the Greater Los Angeles Area is 69%, which is similar to values reported by previous studies. We believe this method can be applied to other regions of the world where household smart meter data are available.