bluuebunny/crossref_metadata_2025_split huggingface dataset:
Quality of service aware adaptive target queue length generation for active queue management
Authors: Hotchi Ryosuke , Kubo Ryogo 
Published: December 2021

AbstractActive queue management techniques have been proposed to mitigate serious congestion issues caused by transmission control protocol flows. Active queue management controllers based on control theory are superior in terms of control performance. Such a controller utilizes a target queue length as a control input, and the congestion control system attempts to maintain the actual queue length close to the target value. However, the specific setting of the target queue length has not been discussed sufficiently. For example, raising or lowering the target queue length may increase goodput or reduce queueing delay, respectively. Therefore, the target queue length should be appropriately generated according to the required quality of services and buffer status. This paper proposes a quality of services–aware adaptive target queue length generation algorithm for an active queue management controller based on control theory. The proposed algorithm comprises two modes (loss‐aware and delay‐aware modes) and attempts to raise or lower the target queue length by considering the buffer status to increase the goodput or reduce the queueing delay. Simulation results revealed that the proposed algorithm could increase goodput or reduce queueing delay on each mode by adapting to the buffer status, which is in contrast to conventional methods.
Wide‐angle scanning phased array using wide‐beamwidth dielectric resonator antenna with miniaturised radiator
Authors: Yin Yeqing , Li Qinlong , Chen Xiaoming 
Published: December 2021

AbstractA wide‐beamwidth dielectric resonator antenna with small radiator is used to design a wide‐angle scanning phased array. The proposed dielectric resonator antenna element uses concave structure for wide‐beamwidth, and the metal patches on the top of the dielectric resonator are used to reduce the size of radiator. The simulated half‐power beamwidth of dielectric resonator antenna is 157.8° and 140.9° in the E‐ and H‐planes, respectively, while the size of the radiator of the dielectric resonator antenna is only 9.7 × 9.7 × 10 mm3 (0.162λ0 × 0.162λ0 × 0.167λ0). One 1 × 8 linear phased array is designed based on the dielectric resonator antenna element. Due to the small size of dielectric resonator radiator, the mutual coupling between the array elements is very small and each element in the array has the similar radiation pattern with wide‐beamwidth. Because of these critical features, the phased array can scan from −67° to +67° with a gain fluctuation less than 1 dB and a maximum side lobe level less than −10 dB. Measurement results agree well with simulation.
Development of quadruped robot for inspection of underground pipelines in nuclear power plants
Authors: Jang Youhyun , Seol Woojin , Lee Kooksun , Kim Kyung‐Soo , Kim Soohyun 
Published: December 2021

AbstractStructural integrity of seawater pipelines in nuclear power plants is a very important issue. In accordance with the operating technical guidelines, the human operators directly enter the pipe and inspect it at every maintenance test. However, in this regard, safety issues such as narrow space and harmful gas are emerging every year.In response to these needs, a quadruped robot that can inspect underground pipes and assist workers has been developed. The robot has an articulated robotic arm that can receive an impact sound of hammering a pipe wall to test pipe integrity. The state of the pipe was examined using a Convolutional Neural Network algorithm. On the other hand, moving in a plumbing environment requires stable walking ability. To determine the gait sequence, a hierarchical gait controller is proposed. The hybrid controller, which consists of joint impedance and torque control, calculated from Model Predictive Control, can switch the gait modes comparing the reference and the current foot contact condition at each control cycle.
Novel DC current interruption technology based on the instability of vacuum arc under composite transverse magnetic fields
Authors: Liu Shaowei , Ma Hui , Chen Jinlong , Geng Yingsan , Liu Zhiyuan , Wang Jianhua 
Published: December 2021

AbstractThe objective of this work intends to propose a novel current interruption technology in vacuum for LVDC power systems, based on the instability of vacuum arc under composite transverse magnetic fields (TMFs). The interruption characteristics were experimentally determined in an overdamping C‐L‐R circuit. The experimental results indicated that the DC current of 800 V/500 A could be successfully interrupted within 5 ms by the proposed technology. Moreover, the interruption process could be divided into two stages, the Stable and Unstable stages. In the Stable stage, the arc voltage linearly increased from 20 to 35 V, where the arc current was limited slightly. In the Unstable stage, the arc voltage would rapidly increase and exceed the supply voltage, where the current would be forced to zero. Finally, the double‐break LVDC vacuum switches, no matter in series or parallel, were difficult to improve the interruption capability, because of the asynchronous occurrence of the Unstable stage in series vacuum interrupters and the fast current‐commutation between parallel vacuum interrupters. This technology takes advantages of high interruption capability, short arcing time and low complexity, which is a promising solution to expand the application of vacuum switch to the LVDC power systems.
Remote health monitoring system using heterogeneous networks
Authors: Naidu Kalpana , Sunkaraboina Sreenu 
Published: December 2021

AbstractThis paper presents the implementation of a remote health monitoring system by using Heterogeneous Networks (HetNet), in which remote patients' vital data can be sent to the proximate hospital with very low end‐to‐end latency. To carry out the aforementioned process, patients' statistics are delivered initially from Wireless Body Area Network (WBAN) to the patients' mobile phone by using ISM band. Then, from there, contemporary networks make use of single wireless network alone to send the patients' data to the nearest hospital (even though there are multiple networks in a terrain). But, this particular network may have so much of end‐to‐end latency as a consequence of lack of resources in the network. However, in the proposed work, all the available heterogeneous Radio Access Technology (RAT) networks carry multiple patients' statistics to the nearest hospital by using either the RAT's free channels (in licensed band) or white space channels. Further, in order to reduce the latency in the proposed system, a novel hand‐off method is suggested in this paper by exploiting SDR features. Moreover, simulation results reveal the effectiveness of the proposed system in terms of end‐to‐end latency and spectral efficiency.
Pavement crack detection using non‐local theory and iterative sampling
Authors: Wei Zixian , SUN Tao , Wu Yuhao , Zhou Liqing , Ruan Xiaoli 
Published: December 2021

AbstractCrack is a common form of road distress and a key study of an intelligent transportation system. However, automatic pavement crack detection is a very challenging task due to noisy texture background, intensity inhomogeneity, and topology complexity. In this paper, a new pavement crack detection algorithm to address these issues is proposed. First, non‐local block matching strategy and local statistical mean are put together to generate the probability map of cracks, which has advantages on automatic threshold choosing and strong resistance to intensity inhomogeneity. Second, an iterative seed points sampling algorithm is proposed, which makes full use of the area and shape of connected regions where the seeds lie in, thus exploiting high reliable crack seeds for following curves extraction. Finally, a minimum spanning tree (MST) is adopted to connect points into crack curves and employ a crack growth method to find out the cracks, which is specified to deal with complex topology of cracks. For parameters, a robust and optimal parameters selection rule is obtained by data driven method. The algorithm is compared with other state‐of‐the‐art algorithms on two datasets. The experiment result shows that the proposed method has a better detection performance on ‐measure score over other methods.
Semi‐supervised image super‐resolution with attention CycleGAN
Authors: Hou Mingzheng , He Xudong , Dou Furong , Zhang Xin , Guo Zhaokang , Feng Ziliang 
Published: December 2021

AbstractSingle‐Image Super‐Resolution (SISR) has always been an important topic in the field of image processing, which attempts to improve the image resolution and is of great significance in practice. Recently, SISR has made substantial progress aided by deep learning (DL), which has demonstrated impressive potential in many low‐level tasks. In the current DL‐based SISR approaches, most of them are based on supervised learning. However, in the real world, only low‐resolution (LR) images with unknown degradation are provided, which limit the application of current supervised models. To mitigate this problem, in this paper, a two‐stage semi‐supervised SISR method called SRAttentionGAN, is proposed. First, an upsampling network SRResNet, which is pre‐trained in a supervised manner, is employed to scale the LR image to the desired size. Then, the upsampled results are fed into our improved unsupervised CycleGAN framework, which does not need paired samples, to obtain sharper and more realistic super‐resolution (SR) images. Specifically, in the improved CycleGAN part, an attention‐guided generator is proposed to perceive the discriminative semantic parts between the source and target images, to avoid the impact from low‐level information. It also prevents the overall color tone from being changed. A multi‐scale discriminator is also adopted to further rich texture details. The effectiveness of the proposed SRAttentionGAN experiments is validated using four benchmarks (Set5, Set14, Urban100, and BSDS100) in both quantitative and qualitative aspects. Compared with the state‐of‐the‐arts, the results are visually promising and show competitive performance in perceptual metrics, Natural Image Quality Evaluator (NIQE) and Perception Index (PI), which have better agreement with the human visual perception.
Two mixed‐ligand coordination polymers: Treatment activity on thyroid cancer
Authors: Liu Xia , Ma Jiang‐Wei , Li Zhen , Liu Fan‐Rong , Wang Rong , Dai Lin‐Lin , Cao Jia 
Published: December 2021

AbstractIn the present work, two novel coordination polymers on the basis of Cu(II) are hydrothermally produced via utilizing 2,5‐dichloroterephthalic acid (H2DCTP), a halogenated linear ligand with the existence of diverse flexible nitrogen‐donor ligands of the 1,4‐bis(5,6‐dimethylbenzimidazol‐1‐yl)‐2‐butylene (L2) and the 1,1′‐(1,4‐butanediyl)bis‐1H‐benzimidazole (L1), and their chemical formulae are [Cu(L1)(DCTP)]n (1) and [Cu(L2)(DCTP)]n (2). The evaluation of two compounds’ treatment effect against the thyroid cancer was carried out, and meanwhile, their relevant mechanism was also studied. First of all, the cancer cells proliferation was detected through Cell Counting Kit‐8 (CCK‐8) detection kit. Furthermore, the JAK‐STAT signalling pathway activation has been assessed through employing real time RT‐PCR assay. Finally, the toxicity of the new compounds was evaluated with MTT assay.
Preventive control method for overload in power‐gas integrated systems based on dynamic security domain of line
Authors: Ouyang Jinxin , Yu Jianfeng , Long Xiaoxuan , Diao Yanbo 
Published: December 2021

AbstractThe power‐gas integrated system (PGIS) is a new trend of energy development. The system provides powerful measures to safely recover the overload line by adjusting the power of synchronous generators (SG), gas turbines (GT), and power‐to‐gas (P2G). However, the power adjustment capability of SGs, GTs, and P2Gs to recover the overload line cannot be accurately described, the impact of line power variation on safety also cannot be quantified, leading to the difficulty of control of overload line. Considering the influence of the locations of SGs, GTs, and P2Gs and power balance constraints, proposing a modeling method of power adjustment capacity of overload line. Considering the dynamic changes of line safety boundary and margin in the process of power adjustment, proposing a new idea of dynamic safety domain for evaluating line safety, a modeling method of dynamic safety domain is further proposed. Moreover, establishing the preventive control optimization model of overload line, the overload preventive control method which considers power adjustment capability of overload line and dynamic security domain is proposed. Finally, the case studies realize the accurate quantification of the dynamic safety of overloaded line, avoiding equipment damage, power supply interruption and even large‐scale cascading failure caused by line overload.
Microbiological and Clinical Effects of a Proanthocyanidin-enriched Extract from Rumex acetosa in Periodontally Healthy Carriers of Porphyromonas gingivalis: a
Randomized Controlled Pilot Study
Authors: Selbach Sabine , Klocke Astrid , Peters Ulrike , Beckert Sabine , Watt Rory Munro , Tong Raymond , Flemmig Thomas Frank , Hensel Andreas , Beikler Thomas 
Published: December 2021

Abstract
Rumex acetosa significantly inhibits the adhesion of Porphyromonas gingivalis (P. g.) to eukaryotic host cells in vitro. The objective of this randomized
placebo-controlled pilot-trial was to analyze effects of a mouth rinse containing 0.8% (w/w) of a quantified proanthocyanidin-enriched extract from Rumex acetosa (RA1) on
microbiological, clinical, and cytological parameters in systemically healthy individuals without history of periodontitis, harboring P. g. intraorally. 35 subjects received a
supragingival debridement (SD) followed by mouth rinsing (3 times daily) with either RA1 mouth rinse solution (test) or placebo (control) for 7 days as adjunct to routine oral hygiene.
Supragingival biofilm samples were taken at screening visit, baseline (BL), 2, 4, 7 and 14 days after SD. P. g. and 11 other oral microorganisms were detected and quantified by rtPCR.
Changes in the oral microbiota composition of one test and one control subject were assessed via high throughput 16S rRNS gene amplicon sequencing. Approximal Plaque Index (API) and the
modified Sulcular Bleeding Index (SBI) were assessed at BL, 7- and 14-days following SD. Brush biopsies were taken at BL and 14 d following SD. Intergroup comparisons revealed no significant
microbiological, cytological, and clinical differences at any timepoint. However, a significant reduction in SBI at day 14 (p = 0.003) and API at day 7 (p = 0.02) and day 14
(p = 0.009) was found in the test group by intragroup comparison. No severe adverse events were observed. The results indicate that RA1 mouth rinse is safe but does not seem to
inhibit colonization of P. g. or improve periodontal health following SD.
Cyclooxygenase Enzyme and Lipid Peroxidation Inhibitory Terpenoids and Steroidal compounds as Major Constituents in Cleome viscosa Leaves
Authors: Dissanayake Amila Abishake , Georges Kambou , Nair Muraleedharan Gopalan 
Published: December 2021

AbstractBioassay guided study of Cleome viscosa Linn. (Cleomaceae) leaves led to the isolation of a new cembrenoid diterpene (1) and three known compounds (2 – 4) from
the hexane extract. The chemical structures of these compounds were elucidated by spectroscopic methods such as NMR (1D and 2D), HRMS and IR and identified and afforded compound 1,
malabaric acid (2), stigmast-4-en-3-one (3) and stigmast-4-ene-3,6-dione (4). This is the first report of compounds 1 and 2 from C. viscosa Linn.
Isolates were evaluated for anti-inflammatory activity using in vitro cyclooxygenase enzyme (COX-1 and -2) inhibitory assays. The novel cembrenoid diterpene (1) exhibited
IC50 values of 8.4 µM for COX-1 enzyme and 45.2 µM for COX-2 enzyme, respectively. Similarly, malabaric acid (2) exhibited IC50 values of 11.5 µM for COX-1
enzyme and 46.9 µM for COX-2 enzyme, respectively. Their inhibitory activities were in par with non-steroidal anti-inflammatory drugs aspirin, ibuprofen and naproxen. Sterols 3 and
4 gave IC50 values of 62.6 and 67.9 µM, respectively for COX-1 enzyme while indicating weak COX-2 enzyme inhibition. Lipid peroxidation inhibitory (LPO) and MTT assays
were used to determine antioxidant activity of these compounds. Compounds 1 – 4 showed LPO inhibition with IC50 values between 82 and 100 µM and moderate antioxidant
activity in the MTT assay. Biological activities reported for these compounds are for the first time and it support anecdotal medicinal claims of C. viscosa Linn. leaves.
Epidemiology of Group A Rotavirus Diarrhea among Children Hospitalized for Acute Gastroenteritis in Ondo State, Nigeria
Authors: Babalola Michael Oluyemi , Olaleye David Olufemi , Odaibo Georgina Njideka 
Published: December 2021

AbstractGlobally, infective group A rotavirus (RVA) enteric infection in children culminates in acute diarrheal disease, severe dehydration, and mortality in children under the age of 5 years, particularly in sub-Saharan Africa. This research sought to determine the prevalence of RVA diarrhea among children aged below 5 years in Ondo state, as one of the necessary frameworks before instituting a vaccine campaign, and to expand knowledge on the epidemiology of RVA diarrhea in Nigeria.In a cross-sectional descriptive study between October 2012 and September 2014, convenience sampling was adopted to obtain demographic information, clinical details, and stool samples from accented under five children who sought treatment for acute gastroenteritis at designated hospitals in Akure and Owo, Nigeria. A total of 390 stool samples were collected from children with acute diarrhea and tested for VP6 RVA antigen using enzyme immunoassay. Data generated were analyzed using descriptive statistics and chi-square at α 0.05.From the 390 children hospitalized for diarrhea, 240 samples (240/390; 61.5%) were from males, while 150 samples (150/390; 38.5%) were from females, representing a male:female ratio of 1.6:1. RVAs were found in 24.2% (58/240) males and 28% (42/150) females, giving a male-female ratio of 1:1.2 and total prevalence of 25.6% (100/390). RVA infection was inversely proportional to the age as a rate of 11.8% was observed in children aged above 36 months and 31.8% (35/110) in children 7 to 12 months, while the highest rate (45.7%) was among children ≤ 6 months old. No significant difference was found (chi-square = 0.712) in the induction of diarrhea in children from Akure and Owo, neither was there any significant difference in the rates of infection between the boys and girls in Akure (chi-square = 0.576) nor in Owo (chi-square = 0.333). Seasonal association (chi-square = 5.802) in RVA infection was observed in the rainy season of year 2013/2014 period.RVA diarrhea occurred year-round at a prevalence of 25.6%, predominantly in females. A seasonal fluctuation was observed in the rainy and dry seasons of the 2-year period. RVA diarrhea occurred predominantly in children aged below 18 months of age, and may thus help in determining the optimal period/schedule of any immunization program.
Chronic Type A Aortic Dissection Repair in a Double Lung Transplant Recipient
Authors: Kamat Neeraj , Traify Ragheb , Williams Brian , Dimarakis Ioannis 
Published: December 2021

AbstractA 69-year-old man presented with a chronic Stanford Type A aortic dissection (CTAAD). The patient had undergone bilateral sequential lung transplantation 15 years prior for α-1-antitrypsin deficiency. We describe the management of CTAAD in the context of lung transplantation from the surgical and anesthetic perspectives.
Mitral Multifocal Papillary Fibroelastoma in a Patient with Aggressive Fibromatosis
Authors: Müller Philipp P. , Agaimy Abbas , Weyand Michael , Heim Christian 
Published: December 2021

AbstractMitral valve fibroelastoma is a rare condition that can be associated with high morbidity rates due to thrombus formation and resulting embolic events. Causative treatment for affected patients is mitral valve surgery. An association between cardiac fibroelastoma and desmoid-type fibromatosis, an aggressive form of fibromatosis, is not yet described. We present a case of a 58-year-old man with a history of desmoid-type fibromatosis and concomitant papillary fibroelastoma of the mitral valve who consequently underwent mitral valve replacement.
Smartphone Compatible versus Conventional Ophthalmoscope: A Randomized Crossover Educational Trial
Authors: Curtis Rachel , Xu Mark , Liu Daisy , Kwok Jason , Hopman Wilma , Irrcher Isabella , Baxter Stephanie 
Published: December 2021

Abstract
Objective The aim of the study is to compare performance and ease-of-use (EOU) of optic disk assessment using a smartphone direct ophthalmoscope attachment (D-EYE) to the gold standard direct ophthalmoscope (DO).
Design The type of study involved is prospective, randomized, crossover, and educational trial.
Participants The participants involved were first year medical students inexperienced in ophthalmoscopy.
Methods Optic disks of standardized and volunteer patients were examined using the D-EYE and a conventional DO. Optic disk identification, EOU ratings of the devices, self-reported confidence level in their examination with the devices, and estimation of vertical cup-to-disk ratio (VCDR) were compared. Analyses included Chi-square tests, independent samples t-tests, correlations, and multivariable linear regression.
Results Forty-four medical students voluntarily participated in the study. Students using the DO required more attempts (3.57 vs. 2.69, p = 0.010) and time (197.00 vs. 168.02 seconds, p = 0.043) to match the patient's fundus to the correct photograph. Overall EOU between the devices (6.40 vs. 4.79, p < 0.001) and overall confidence in examination (5.65 vs. 4.49, p = 0.003) were greater when using the D-EYE. There were no statistically significant differences in accuracy of VCDR estimations between the two ophthalmoscopes.
Conclusion Smartphone ophthalmoscopy could offer additional learning opportunities in medical education and may be considered in clinical practice by non-specialist physicians given its greater EOU and increased success in visualizing the optic disk.
Methanol decomposition on Ni(111) and O/Ni(111)
Authors: Öström Henrik , Zhang Bingjie , Vallejo Tiffany , Merrill Bryn , Huang Jeremy , LaRue Jerry 
Published: December 2021

Methanol decomposition on Ni(111) surfaces has been studied in the presence and absence of oxygen using temperature-programmed desorption and temperature-dependent sum frequency generation spectroscopy. Under both conditions the C–H and O–H bonds break, forming carbon monoxide and atomic hydrogen on the surface. No C–O bond scission was observed, limiting the number of reaction pathways. The O–H bonds break first (&gt;150 K), forming surface methoxy, followed by C–H bond breakage (&gt;250 K). All atomic hydrogen desorbs from the surface as H2 through H+H recombinative desorption. H2 desorbs at a higher temperature in the presence of oxygen (&gt;300 K) than the absence of oxygen (&gt;250 K) as the oxygen on the surface stabilizes the H atoms, forming surface hydroxide (OH). The surface oxygen also appears to stabilize the O–H and C–H bonds, leading to slightly higher dissociation temperatures. The CO molecules occupy both the bridge sites and the top sites of the Ni atoms as surface H appears to force the CO molecules to the top sites. There is a slight blueshift in the C–O bond vibration for both the O covered and O free surfaces due to CO being more mobile. On the O free surface, the C–O peak width broadens as low-frequency modes are activated. Finally, CO desorbs between 350 and 400 K.