bluuebunny/crossref_metadata_2025 huggingface dataset:
Helically shaped cation receptor: design, synthesis, characterisation and first application to ion transport
Authors: Boufroura Hamza , Plais Romain , Poyer Salomé , Gaucher Anne , Marrot Jérome , Clavier Gilles , Legrand François-Xavier , Huin Cécile , Guégan Philippe , Prim Damien , Salpin Jean-Yves
Published: August 2020

An helicene-like receptor is able to transport K+ across lipid membrane.
Magneto-induced rheological properties of magnetorheological gel under quasi-static shear with large deformation
Authors: Mao Runsong , Wang Huixing , Zhang Guang , Ye Xudan , Wang Jiong
Published: August 2020

Magnetorheological gel is a material composed of magnetic particles and polyurethane. CIPs content, shear rate, shear strain amplitude and magnetic field affect damping performance. The magento-induced enhancement of energy dissipation density of MRG-60 could reach 104900%.
A comparative study of the structures, thermal stabilities and energetic performances of two energetic regioisomers: 3(4)-(4-aminofurazan-3-yl)-4(3)-(4-nitrofurazan-3-yl)furoxan
Authors: Zhang Jiarong , Bi Fuqiang , Zhai Lianjie , Huo Huan , Yang Zhi , Wang Bozhou
Published: August 2020

Two energetic regioisomers ANFF-34 and ANFF-43 with satisfactory thermal behaviors and low mechanical sensitivities were comparatively studied.
Correction: Pharmacokinetic–pharmacodynamic modeling for Moutan Cortex/Moutan Cortex charcoal and the contributions of the chemical component using support vector regression with particle swarm optimization
Authors: Pan Sixing , Zhou Jianan , Zhou Sujuan , Huang Zhanpeng , Meng Jiang
Published: August 2020

Correction for ‘Pharmacokinetic–pharmacodynamic modeling for Moutan Cortex/Moutan Cortex charcoal and the contributions of the chemical component using support vector regression with particle swarm optimization’ by Sixing Pan et al., RSC Adv., 2020, 10, 24454–24462, DOI: 10.1039/D0RA04111D.
A conductive metal–organic framework photoanode
Authors: Pattengale Brian , Freeze Jessica G. , Guberman-Pfeffer Matthew J. , Okabe Ryotaro , Ostresh Sarah , Chaudhuri Subhajyoti , Batista Victor S. , Schmuttenmaer Charles A.
Published: August 2020

We report the development of photosensitizing arrays based on conductive metal–organic frameworks (MOFs) that enable light harvesting and efficient charge separation.
The post-treatment effects on open circuit voltages and device performances in a high efficiency all-small-molecule organic solar cell
Authors: Zhang Ziqi , Wu Qiong , Deng Dan , Wu Sihua , Sun Rui , Min Jie , Zhang Jianqi , Wei Zhixiang
Published: August 2020

Post-treatment effects on open circuit voltages and device performances in a novel high efficiency all-small-molecule OSC were deeply investigated.
Eight‐channel hybrid‐integrated laser array with 100 GHz channel spacing
Authors: Wang Mingjin , Dong Fengxin , Meng Ranzhe , Ma Pijie , Liu Jing , Wang Hailing , Wang Xueyou , Zheng Wanhua
Published: August 2020

An eight‐channel hybrid‐integrated light source with 100 GHz channel spacing fabricated by a passive alignment technology is demonstrated. Side mode suppression ratios of better than 40 dB were obtained via grating couplers under eight‐channel simultaneous operation at a continuous wave current of 600 mA and 25°C. The surface slotted laser array fabricated by standard lithography butt‐joint with silicon photonic devices was demonstrated for the first time, to the best of the authors’ knowledge.
Modelling solar irradiance from ground-based photometric observations
Authors: Chatzistergos Theodosios , Ermolli Ilaria , Giorgi Fabrizio , Krivova Natalie A. , Puiu Cosmin Constantin
Published: August 2020

Total solar irradiance (TSI) has been monitored from space since 1978, i.e. for about four solar cycles. The measurements show a prominent variability in phase with the solar cycle, as well as fluctuations on timescales shorter than a few days. However, the measurements were done by multiple and usually relatively short-lived missions. The different absolute calibrations of the individual instruments and the unaccounted for instrumental trends make estimates of the possible long-term trend in the TSI highly uncertain. Furthermore, both the variability and the uncertainty are strongly wavelength-dependent. While the variability in the UV irradiance is clearly in-phase with the solar cycle, the phase of the variability in the visible range has been debated. In this paper, we aim at getting an insight into the long-term trend of TSI since 1996 and the phase of the solar irradiance variations in the visible part of the spectrum. We use independent ground-based full-disc photometric observations in Ca II K and continuum from the Rome and San Fernando observatories to compute the TSI since 1996. We follow the empirical San Fernando approach based on the photometric sum index. We find a weak declining trend in the TSI of $ {-7.8}_{-0.8}^{+4.9}\times 1{0}^{-3}$ Wm−2 y−1 between the 1996 and 2008 activity minima, while between 2008 and 2019 the reconstructed TSI shows no trend to a marginally decreasing (but statistically insignificant) trend of $ {-0.1}_{-0.02}^{+0.25}\times 1{0}^{-3}$ Wm−2 y−1. The reference TSI series used for the reconstruction does not significantly affect the determined trend. The variation in the blue continuum (409.2 nm) is rather flat, while the variation in the red continuum (607.1 nm) is marginally in anti-phase, although this result is extremely sensitive to the accurate assessment of the quiet Sun level in the images. These results provide further insights into the long-term variation of the TSI. The amplitude of the variations in the visible is below the uncertainties of the processing, which prevents an assessment of the phase of the variations.
Photoangiolytische Laser in der Laryngologie
Authors: Hess Markus , Fleischer Susanne
Published: August 2020

Mit photoangiolytischen Lasern wie dem KTP (Kalium-Titanyl-Phosphat, 532 nm Wellenlänge) -Laser oder dem neuen „blauen“ Laser (445 nm Wellenlänge) können kleinste Gefäße innerhalb der Stimmlippen unter Schonung des darüberliegenden Epithels und der Lamina propria verödet werden. Dadurch kann jetzt noch besser der Forderung Rechnung getragen werden, bei der effektiven Behandlung von pathologischen Gewebeveränderungen, wie bspw. bei Papillomen, Ödemen, Polypen, Leukoplakien, Dysplasien und ektatischen Blutgefäßen, gleichzeitig die physiologische Schwingungsfähigkeit der Stimmlippe zu bewahren. Da das Laserlicht durch feinste Glasfasern in den Kehlkopf geleitet werden kann, sind schmerzfreie Eingriffe im Behandlungsstuhl mit indirekt transnasal eingeführten flexiblen Optiken (mit Arbeitskanal) wie auch Operationen in Vollnarkose während einer Mikrolaryngoskopie möglich. Ein neuer sog. „blauer“ Laser ermöglicht zusätzlich neben der Koagulation auch das Schneiden von Gewebe, dann meist in Mikrolaryngoskopie.
Belastungsbezogene Störungen in der
Rehabilitation
Authors: Kreutzer Lili , Köllner Volker
Published: August 2020

Gegenüber der ICD-10 sind die komplexe posttraumatische
Belastungsstörung sowie die anhaltende Trauerstörung in der
ICD-11 hinzugekommen, und die Anpassungsstörung wurde neu
konzeptualisiert. Diese Störungsbilder sind für die
Rehabilitation relevant – als Hauptdiagnosen in der Psychosomatik
und als Komorbidität in der somatischen Rehabilitation.
Traumatic injuries to the hand and wrist in youth elite handball are most frequently localised to the thumb and proximal interphalangeal joints
Authors: Mandlik Veronika , Achenbach Leonard , Rüwe Marc , Kuhr Matthias , Fehske Kai
Published: August 2020

Introduction Hand and wrist injuries have been described as the second most common severe injuries in handball. However, no evidence exists regarding the specific characteristics of these injuries. The aim of this study was to determine the injury pattern of hand and wrist injuries in youth handball.

Materials and Methods Two-hundred and ninety-six adolescent elite handball players (mean age: 14.0 ± 0.8 years) completed a retrospective survey regarding their hand and wrist injuries during the previous season. The injury questionnaire was adapted from sports-specific questionnaires to the demands of hand and wrist injuries in handball and included injury location, type of injury and injury severity.

Results One-hundred and twenty-three (42 %) players reported 156 injuries (0.53 injuries per season per player) to their hands or wrists in the past season. Injuries to the proximal interphalangeal joints were most frequently described (n = 74, 47 %). The thumb was involved in 46 (29 %) cases. Sprains (n = 113, 72 %) were the most common type of injury. Thirty-six percent of moderate and severe injuries (> 7 days time loss) had not been treated by a physician.

Conclusions The rates of hand and wrist injuries are high in youth elite handball. Injury prevention strategies and return to competition criteria should focus on the thumb and the interphalangeal joints. Further research into these injuries is essential to identify risk factors and to develop adequate injury prevention measures.
Bewegungsdeterminanten, Erfüllung der Empfehlungen
für ausdauerorientierte Bewegung und Gesundheit: Ergebnisse einer
Korrelationsstudie aus den österreichischen
Bundesländern
Authors: Dorner Thomas Ernst , Haider Sandra , Lackinger Christian , Kapan Ali , Titze Sylvia
Published: August 2020

Ziel der Studie Ziel dieser Analyse war es, Zusammenhänge zu
untersuchen zwischen Personen, die die ausdauerorientierten
Bewegungsempfehlungen erfüllen und dem Wissen um die
Bewegungsempfehlungen, die wahrgenommene bewegungsförderliche Kultur und
Umgebung sowie den Gesundheitszustand getrennt nach Bundesländern.

Methodik Für die Analyse wurden Daten aus dem
österreichischen Bewegungsmonitoring 2017, der österreichischen
Gesundheitsbefragung 2014, der Mortalitätsstatistik 2015, der
Fit-Sport-Austria Datenbank, der Wirtschaftskammer, dem Verkehrsministerium und
einer Online-Lauf-Plattform herangezogen. Korrelationskoeffizienten (Pearson)
verschiedener Parameter mit den Bevölkerungsanteilen, die die
ausdauerorientierten Bewegungsempfehlungen erfüllten, wurden
errechnet.

Ergebnisse Ausdauerorientierte Bewegung korrelierte signifikant mit dem
Wissen zum empfohlenen Bewegungsumfang (0,91), Angeboten in (0,87) und
subjektiver Erreichbarkeit von Sportvereinen (0,85), Erreichbarkeit von
Grünräumen (0,84), Anzahl an Sportvereinen mit zertifizierten
gesundheitsförderlichen Angeboten (0,76), und den Möglichkeiten
Laufen zu gehen (0,72). Außerdem korrelierte ausdauerorientierte
Bewegung negativ mit der altersstandardisierten kardiovaskulären
Mortalität (−0,96), der Gesamtmortalität
(−0,95), der Prävalenz von Adipositas (−0,83), der
Mortalität an ischämischen Herzerkrankungen (−0,76), der
Prävalenz chronischer Krankheiten (−0,68), sowie positiv mit der
subjektiv wahrgenommenen Gesundheit (0,79).

Schlussfolgerung Zum einen zeigten sich positive signifikante
Zusammenhänge zwischen Wissen um die Bewegungsempfehlungen, der
Infrastruktur und der bewegungsförderlichen Kultur mit dem
Bewegungsverhalten. Zum anderen korrelierte das Bewegungsverhalten mit dem
Gesundheitszustand in den jeweiligen Bundesländern. Zusätzlich
lassen sich spezifische Empfehlungen, zugeschnitten auf die einzelnen
Bundesländer, ableiten.
Radiation-Induced Brachial Plexopathy in Breast Cancer and the Role of Surgical Treatment
Authors: Kıbıcı Kenan , Erok Berrin , Atca Ali Önder
Published: August 2020

Objective We aimed to evaluate improvement in the pain, motor, and sensory functions after neurosurgical intervention, by objective methods in patients with radiation-induced brachial plexopathy (RIBP), as a complication of radiotherapy (RT).

Materials and Methods In our study, 11 patients, who experienced grade 3 or 4 brachial plexopathy according to the LENT-SOMA (late effects of normal tissue—subjective, objective, management, analytic) side-effect index, as a complication of RT which was performed after being operated for breast cancer, were included. In the postoperative period pain, sensation, and motor function loss were followed.

Results There was apparent regression in the pain. The mean visual analogue scale (VAS) value decreased to 4 from the preoperative VAS value of 9.4. However, no significant improvement was observed in either sensory and motor functions.

Conclusion RIBP is a progressive disease in breast cancer patients after radiotherapy. Evaluation of the results of applied surgical treatments and changes in the results with time is important to direct the treatment. Neurolysis should only be considered when other treatment methods fail and should be considered as an irreversible and potentially permanent procedure.
Prostatitis crónica: Aporte del contraste endovenoso en fase tardía para su caracterización en resonancia magnética multiparamétrica de próstata
Authors: Aineseder Martina , López Grove Roy , Pietrani Marcelo Andrés , Ocantos Jorge Alberto
Published: August 2020

Objetivo El objetivo de este estudio es demostrar la utilidad de una secuencia tardía post-contraste en la resonancia magnética multiparamétrica de próstata (RMMP) para caracterizar lesiones PI-RADS II.

Materiales y métodos Se analizaron en forma retrospectiva las RMMP realizadas entre enero de 2015 y diciembre de 2016. El protocolo de la RMMP fue basado en las recomendaciones del PI-RADS versión 2, y se agregó una adquisición tardía luego del dinámico post-contraste. Los reportes fueron revisados bajo la versión 2.1.

Resultados Se seleccionaron 31 pacientes que presentaron lesiones categorizadas como PI-RADS II en la zona periférica, los cuales se encontraban en seguimiento del antígeno prostático específico y presentaron confirmación histológica de prostatitis crónica. Se evidenció un realce tardío de la lesión en todos los pacientes. Según los resultados histopatológicos, 30 presentaban prostatitis crónica y el restante tejido benigno (tejido fibromuscular).

Discusión La prostatitis crónica no muestra realce temprano, y presenta realce tardío debido al tejido conectivo fibroso que la compone. En la RMMP, la prostatitis puede imitar el cáncer de próstata. Agregar una adquisición tardía solo adiciona 150 segundos al estudio y podría ayudar a resolver aquellos casos inciertos categorizados como PI-RADS III empleando las secuencias convencionales, debido a que el realce tardío de la lesión es altamente sugestivo de un proceso inflamatorio (PI-RADS II).

Conclusión La presencia de realce tardío es una herramienta útil para realizar un adecuado diagnóstico de una lesión PI-RADS II en la zona periférica, pudiendo evitar una biopsia innecesaria.
Revisión de la clasificación de Hinchey (diverticulitis) y su correlación terapéutica
Authors: Roccatagliata Nicolás Daniel , Rodríguez Leidy Diana , Guardo Lizeth , Larrañaga Victor Nebil , Espil Germán , Vallejos Javier
Published: August 2020

La diverticulosis es una entidad que predomina en países occidentales. Su prevalencia aumenta con la edad, presentándose en aproximadamente el 80% de la población mayor de 85 años. Los divertículos colónicos adquiridos son herniaciones saculares de la mucosa y submucosa (pseudodivertículos) y predominan en sigma, en países occidentales; los congénitos poseen las tres capas parietales (divertículos verdaderos) y predominan en colon derecho, en países asiáticos. Aproximadamente un 10%-25% de dichos pacientes con diverticulosis presentarán a lo largo de su vida un cuadro de diverticulitis aguda, representando una de las causas más frecuentes de abdomen agudo (3,8%).

Clínicamente, se expresa por dolor abdominal en fosa ilíaca izquierda (excepción en dolicosigma/divertículos congénitos derechos) y pueden presentar complicaciones como flemones, abscesos, pileflebitis, peritonitis, con consiguiente riesgo de vida.

La tomografía computada (TC) permite el diagnóstico oportuno, identificación de complicaciones y planificación terapéutica. A dicho fin se establecieron diferentes clasificaciones y modificaciones, siendo la más reconocida la propuesta por Hinchey (modificada por Wasvary y col., Kaiser y col.) y otras estableciendo correlaciones con el tratamiento, como la propuesta por Sartelli y col.

El objetivo del presente estudio es realizar una revisión iconográfica de esta última (Sartelli y col.) y evaluar sus implicancias terapéuticas.
Pediatric Surgery during the COVID-19 Pandemic: An International Survey of Current Practice
Authors: Nasher Omar , Sutcliffe Jonathan Richard , Stewart Richard James
Published: August 2020

Introduction Understanding the challenges experienced by pediatric surgeons in the early phases of the pandemic may help identify key issues and focus research.

Materials and Methods Two pediatric surgeons from each of the 10 countries most affected by COVID-19 were surveyed over a 10-day period. Data were obtained regarding service provision, infection control, specific surgical conditions, and the surgical workforce.

Results Twenty pediatric surgeons responded. All centers had postponed non-emergency surgery and clinics for nonurgent conditions with virtual consultations being undertaken in 90% of centers. A majority (65%) of centers had not yet knowingly operated on a positive patient. Minimal access surgery was performed in 75% centers but a further 75% had reduced or stopped upper gastrointestinal endoscopy. The management of simple appendicitis was unchanged in 70% centers, patients with intussusception were being referred for radiological reduction in all centers and definitive pull-through surgery for Hirschsprung patients was performed by 95% where washouts were successful. Timing of surgery for reducible neonatal inguinal hernias had changed in 55% of centers and the management of urgent feeding gastrostomy referrals and of inflammatory bowel disease patients failing with biological therapy varied considerably.

Conclusion Service provision has been severely affected by COVID-19 leading to an inevitable increase in untreated surgical pathology. Better understanding of extrapulmonary infectivity, the risk of asymptomatic carriage in children, and the reliability of testing for surgical scenarios may allow appropriate use of conventional surgery, including laparoscopy and endoscopy, and rational development of the novel care pathways needed during the pandemic.
Driving Factors of Preterm Birth Risk in Adolescents
Authors: Perez Marta J. , Chang Jen J. , Temming Lorene A. , Carter Ebony B. , López Julia D. , Tuuli Methodius G. , Macones George A. , Stout Molly J.
Published: August 2020

Objective We examined rates of spontaneous and indicated preterm births (S-PTB and I-PTB, respectively) and clinical risk factors for PTB in adolescents.

Study Design This is a population-based, retrospective cohort using 2012 U.S. natality data of nulliparous women who delivered a nonanomalous singleton birth between 20 and 42 weeks' gestation. Maternal age included <16, 16 to 19.9, and ≥20 years. Rates of total, S-PTB, and I-PTB were compared across age groups. Multinomial logistic regression tested clinical risk factors for S-PTB.

Results In 1,342,776 pregnancies, adolescents were at higher risk for PTB than adults. The rate of total PTB was highest in young adolescents at 10.6%, decreased to 8.3% in older adolescents, and 7.8% in adults. The proportion of S-PTB was highest in the youngest adolescents and decreased toward adulthood; the proportion of I-PTB remained stable across age groups. Risk factors for S-PTB in adolescents included Asian race, underweight body mass index (BMI), and poor gestational weight gain (GWG). In all age groups, carrying a male fetus showed a significant increased S-PTB, and Women, Infants, and Children's (WIC) participation was associated with a significantly decreased risk.

Conclusion The higher risk for PTB in adolescents is driven by an increased risk for S-PTB. Low BMI and poor GWG may be potentially modifiable risk factors.

Condensation Adolescents have a higher risk for spontaneous PTB than adult women, and risk factors for spontaneous PTB may differ in adolescents.
The Neurological Aspects of COVID-19: Do Women Respond Differently?
Authors: Takkar Aastha , Singla Monika
Published: August 2020

Neurovirulence of Coronavirus-2 (SARS-CoV-2) was established soon after the Coronavirus disease-19 (COVID-19) pandemic broke. While the initial reports from Chinese cohorts suggested that around 8 to 36% patients of COVID-19 develop neurological complications, upcoming literature revealed the various neurological presentations this newly emergent virus could have. Data on neurological manifestations of COVID-19 is still accumulating. Despite an immense flooding of recent databases, gender-specific issues of this novel virus still remain elusive. Increased mortality has been noted in elderly male patients, and immediate risk of death is a major concern. As per the available literature, women are more likely to recover from the virus, but little is described about the medical and social repercussions. Gender-based analysis should help delineate specific problems in women in the rapidly changing scenario. This article discusses the relevant neurological aspects of COVID-19 with specific reference to women.
Stochastic dynamics of a nonlinear oscillator driven by periodic force with slowly varying frequency
Authors: Bakai Oleksandr , Bratchenko Mykhailo
Published: August 2020

The topology of phase portraits for nonlinear oscillators driven by a periodic force undergoes significant changes within a narrow interval of the driving force frequencies v. This property leads to nonintegrability of the equations of motion, and stochastization of their solutions when v is periodically modulated. Such behavior is due to the violation of adiabaticity and destruction of the integral manifolds, accompanied by topological rearrangements of the integral curves. We study specific features of such stochastic dynamics in a wide range of modulation periods and damping decrements.
Telehealth uptake in general practice as a result of the coronavirus (COVID-19) pandemic
Authors: Snoswell Centaine L. , Caffery Liam J. , Haydon Helen M. , Thomas Emma E. , Smith Anthony C.
Published: August 2020

In March 2020, the Australian Government added new temporary telehealth services to the Medicare Benefits Schedule (MBS) to reduce the risk of patient–patient and patient–clinician transmission of the 2019 coronavirus (COVID-19). Here, the MBS statistics for general practitioner activity and the associated costs are described; a small increase in both activity and costs for the new MBS telehealth items were observed. The opportunities for future research and policy implications are also discussed.
Developing a population-state decision system for intelligently reprogramming extracellular electron transfer in
Shewanella oneidensis
Authors: Li Feng-He , Tang Qiang , Fan Yang-Yang , Li Yang , Li Jie , Wu Jing-Hang , Luo Chen-Fei , Sun Hong , Li Wen-Wei , Yu Han-Qing
Published: August 2020

Significance

The dynamic optimization of the cellular resource allocation of microbes can efficiently enhance their microbial extracellular electron transfer output. Therefore, we develop a quorum sensing-based system to intelligently reprogram the extracellular electron transfer output upon the population state. This system is able to autonomously shift the dominant metabolic flux from the initial microbial growth to the later extracellular electron transfer enhancement. By incorporating the extracellular electron transfer network, this system achieves significant improvements in extracellular electron transfer output and pollutant reduction capability. This work provides a powerful approach to intelligently manage microbial extracellular electron transfer for improved environmental applications and may serve as a feasible and effective tool for the development of smart bioelectrical devices.
The backstories of Cold War translations
Authors: Elias-Bursać Ellen
Published: August 2020

Ideological expectations coupled with opportunism, personal advancement, friendship, and the political and ideological
loyalties held by those who served as patrons for publishing translations were the factors that informed decisions about what would be
translated in the Cold War years between 1945 and 1989. This article considers the choices made by publishers Frederick A. Praeger, Harcourt
Brace Jovanovich, and Vanguard Press when publishing the fiction and non-fiction of Milovan Djilas and Miroslav Krleža, writers from Yugoslavia.
The backstories behind the publishing of the translations lie at the intersection of the public and private spheres of culture, and
demonstrate how ideological agendas interlace with personal bonds, loyalties, aspirations, and ambitions.
Voluntary and Forced Migrants in Forensic Mental Health Care
Authors: Penney Stephanie R. , Prosser Aaron , Grimbos Teresa , Egag Egag , Simpson Alexander I. F.
Published: August 2020

Foreign-born migrants are at elevated risk for developing serious forms of mental illness, and are over-represented in criminal justice and forensic mental health settings. This study compares the clinical characteristics of forced ( n = 60) and voluntary ( n = 226) migrant patients in a Canadian forensic service to native-born patients ( n = 234), and contrasts regions of birth represented in the current sample to the total adult migrant population in our catchment city ( N = 2,537,410). Compared to Canadian-born patients, migrant patients were more likely to have a later-onset psychotic disorder as their only diagnosis, and less likely to have a personality disorder diagnosis. Migrant patients had more familial supports prior to illness onset, but were socially isolated near the time of forensic admission. Compared to the total adult migrant population, higher proportions of Caribbean, Central American, Eastern and Western African persons were represented in the forensic system, while fewer individuals from East and South Asia were represented. There was no effect of migrancy status on the duration of forensic hospitalization or community supervision. Findings suggest disproportionate minority representation among users of forensic services, and highlight what may be ineffective pathways to adequate mental health care among certain migrant groups.
Effect of Sb composition on the band alignment of InAs/GaAsSb quantum dots*
Authors: Lu Guangze , Lv Zunren , Zhang Zhongkai , Yang Xiaoguang , Yang Tao
Published: August 2020

Aiming to achieve InAs quantum dots (QDs) with a long carrier lifetime, the effects of Sb component in cap layers on the band alignment of the InAs/GaAsSb QDs have been studied. InAs QDs with high density and uniformity have been grown by molecular beam epitaxy. With increasing Sb composition, the InAs/GaAsSb QDs exhibit a significant red-shift and broadening photoluminescence (PL). With a high Sb component of 22%, the longest wavelength emission of the InAs/GaAs0.78Sb0.22 QDs occurs at 1.5 μm at room temperature. The power-dependence PL measurements indicate that with a low Sb component of 14%, the InAs/GaAs0.86Sb0.14 QDs have a type-I and a type-II carrier recombination processes, respectively. With a high Sb component of 22%, the InAs/GaAs0.78Sb0.22 QDs have a pure type-II band alignment, with three type-II carrier recombination processes. Extracted from time-resolved PL decay traces, the carrier lifetime of the InAs/GaAs0.78Sb0.22 QDs reaches 16.86 ns, which is much longer than that of the InAs/GaAs0.86Sb0.14 QDs (2.07 ns). These results obtained here are meaningful to realize high conversion efficiency intermediate-band QD solar cells and other opto-electronic device.
Ultrafast photoionization of ions and molecules by orthogonally polarized intense laser pulses: Effects of the time delay*
Authors: Zhang Si-Qi , Yang Zhi-Jie , Lei Zhi-Xian , Feng Wei , Zhou Sheng-Peng , Yuan Kai-Jun , Liu Xue-Shen , Guo Jing
Published: August 2020

We present the photoelectron momentum distributions (PMDs) and the photoelectron angular distributions (PADs) of He+ ions, aligned

H
2
+

molecules and N2 molecules by intense orthogonally polarized laser pulses. Simulations are performed by numerically solving the corresponding two-dimensional time-dependent Schrödinger equations (TDSEs) within the single-electron approximation frame. Photoelectron momentum distributions and photoelectron angular distributions present different patterns with the time delays T
d, illustrating the dependences of the PMDs and PADs on the time delays by orthogonally polarized laser pulses. The evolution of the electron wavepackets can be employed to describe the intensity of the PADs from the TDSE simulations for N2 molecules.
Enhanced mobility of MoS2 field-effect transistors by combining defect passivation with dielectric-screening effect*
Authors: Li Zhao , Xu Jing-Ping , Liu Lu , Zhao Xin-Yuan
Published: August 2020

A facile method of combining the defect engineering with the dielectric-screening effect is proposed to improve the electrical performance of MoS2 transistors. It is found that the carrier mobility of the transistor after the sulfur treatment on the MoS2 channel is greatly enhanced due to the reduction of the sulfur vacancies during vulcanization of MoS2. Furthermore, as compared to those transistors with HfO2 and SiO2 as the gate dielectric, the Al2O3-gate dielectric MoS2 FET shows a better electrical performance after the sulfur treatment, with a lowered subthreshold swing of 179.4 mV/dec, an increased on/off ratio of 2.11×106, and an enhanced carrier mobility of 64.74 cm2/V⋅s (about twice increase relative to the non-treated MoS2 transistor with SiO2 as the gate dielectric). These are mainly attributed to the fact that a suitable k-value gate dielectric can produce a dominant dielectric-screening effect overwhelming the phonon scattering, increasing the carrier mobility, while a larger k-value gate dielectric will enhance the phonon scattering to counteract the dielectric-screening effect, reducing the carrier mobility.
Impact vibration properties of locally resonant fluid-conveying pipes*
Authors: Hu Bing , Zhu Fu-Lei , Yu Dian-Long , Liu Jiang-Wei , Zhang Zhen-Fang , Zhong Jie , Wen Ji-Hong
Published: August 2020

Fluid-conveying pipe systems are widely used in various equipments to transport matter and energy. Due to the fluid–structure interaction effect, the fluid acting on the pipe wall is easy to produce strong vibration and noise, which have a serious influence on the safety and concealment of the equipment. Based on the theory of phononic crystals, this paper studies the vibration transfer properties of a locally resonant (LR) pipe under the condition of fluid–structure interaction. The band structure and the vibration transfer properties of a finite periodic pipe are obtained by the transfer matrix method. Further, the different impact excitation and fluid–structure interaction effect on the frequency range of vibration attenuation properties of the LR pipe are mainly considered and calculated by the finite element model. The results show that the existence of a low-frequency vibration bandgap in the LR pipe can effectively suppress the vibration propagation under external impact and fluid impact excitation, and the vibration reduction frequency range is near the bandgap under the fluid–structure interaction effect. Finally, the pipe impact experiment was performed to verify the effective attenuation of the LR structure to the impact excitation, and to validate the finite element model. The research results provide a technical reference for the vibration control of the fluid-conveying pipe systems that need to consider blast load and fluid impact.
The Increasing Accumulation of Pb Content in Marine Waters
Authors: Yang Dongfang , Lin Dong , Zhu Hong , Yuan Xianpeng , Li Haixia
Published: August 2020

Based on the investigation data of waters in Jiaozhou Bay in May, August and October, 1992, Pb content and horizontal distribution at surface waters in Jiaozhou Bay were studied in this paper. The results showed that the range of Pb content in Jiaozhou Bay was 3.87-37.90 μg/L corresponding to Class II, III and IV in accordance with Sea Water Quality Standard. It illustrated that in terms of Pb content in May, August and October, the entire waters in Jiaozhou Bay experienced low, medium and high pollution. The Pb content in Jiaozhou Bay was transported in four ways - ships and wharf, overland runoff, rivers and open ocean current, which was 16.34 μg/L, 14.85 μg/L, 13.25-37.90 μg/L and 13.25-37.53 μg/L respectively, shown in model diagrams. The transfer process of Pb content from the sources to the destinations was depicted in this paper to prove that Pb content causes pollution to the environment and ecology during temporal and spatial transfer.
The Design of Smart Library Based on 5G
Authors: Jiahui Li , NingXing Wang , Chao Duan
Published: August 2020

This article takes the “first step” attitude to seize the development opportunities of 5G and its group technology, make full use of the functions of 5G mobile Internet, and promote the application of 5G communication technology in the field of the library. On the basis of designing a three-dimensional real-time book tracking map, etc., the author put forward the concept of a future smart library based on 5G mobile Internet.
Design of People Flow Monitoring System in Public Place based on MD-MCNN
Authors: Tianmin Xiong , Xiaochun Lei , Xingwen Zheng , Junyan Chen , Yizhou Feng
Published: August 2020

Due to the limitation of hardware resources, the traditional people flow monitoring system based on computer vision in public places can’t meet different crowd-scale scenarios. Therefore, a people flow monitoring system based on MD-MCNN algorithm is designed, which is an application system combining the improved SSD object detection algorithm MNSSD and MCNN density map regression algorithm. In the initial stage, the system uses MNSSD for accurate detection and counting. If the people flow gradually reaches a certain threshold, the system automatically uses MCNN to estimate people flow until the people flow falls below the threshold. Through the experimental verification, the system can realize the people flow statistics of low-density and high-density people in different scenarios, and can be applied on the existing embedded platform. This scheme can be extended to smart cities, smart scenic spots, smart transportation and other fields.
Non-uniform Quantization of Soft Information for 5G LDPC Codes
Authors: Chang Xiaohua , Zhang Yu
Published: August 2020

This paper proposes a non-uniform quantization algorithm of soft information based on density evolution for the decoding of low-density parity check (LDPC) codes, which applies a non-linear transform function to soft information, and provides good block error rate performance. The transform function is obtained by minimizing weighted mean square quantization error for every combination of modulation type and LDPC codes and has an analytical expression of distribution of soft information. It can be realized as look-up table via quantization of transform function and has low complexity of implementation. Simulation results show that the error performance of proposed algorithm is close to no quantization condition and has a gain of around 0.3 dB compared to uniform quantization algorithm for 5G’s rate 2/3 LDPC codes with APSK modulation over additive white Gaussian noise (AWGN) channel.
Design of Intelligent Robot Platform based on Multi-sensor Fusion
Authors: Dajin Ya , Xiaochun Lei , Yue Li , Junyan Chen , Rongcun Huang , Lin Lan
Published: August 2020

The mobile robot adapts to the more complicated indoor and outdoor environments, and can expand its scope of application. In order to reduce the influence of the cumulative error caused by navigation in complex environments, the indoor mobile robot that combines Inertial Measurement Unit (IMU) and encoder fusion is designed and implemented. In view of the limitations of the traditional single lidar scheme, a Multi-sensor Fusion scheme is proposed to achieve indoor map construction, path planning, multi-point navigation and other functions, and a MSIF KartoSLAM (Multi-sensor Information Fusion) algorithm is proposed, which combines the KartoSLAM algorithm and Multi-sensor information to achieve map construction in complex environments. Through comprehensive testing in the indoor environment, the results show that the Multi-sensor Fusion scheme is superior to the traditional single lidar scheme, and can achieve higher accuracy in mapping and navigation. At the same time, the robot platform can also be combined with the Internet of Things technology and integrated into intelligent housing system.
Research on Energy Efficiency Optimization of Energy Internet Data Center Based on Intelligent Energy Technology
Authors: Cao Yu , Hao Han-yong
Published: August 2020

With the extensive and in-depth view of the overall situation of energy, energy as an important material basis affects the development and progress of social economy. Through the research on the connotation of energy internet, the development status of distributed generation and the business model of distributed generation, the value sources of distributed generation in energy Internet system are analyzed. The smart energy technology consists of three parts: the energymanagementplatform, the communication system, and the terminal. The characteristics of low-carbonization, flexibility and energy Internet of regional distributed energy systems under the development of energy Internet were analyzed. Research shows that the interaction behavior of multiple subjects in the energy Internet can not only predict the system equilibrium state in advance, but also provide effective feedback for the optimization and improvement of the system operation mechanism.
A Review of Research on Light Visual Perception of Unmanned Surface Vehicles
Authors: Zhang Wei , Yang Chi-fu , Jiang Feng , Gao Xian-zhong , Yang Kai
Published: August 2020

Unmanned surface vehicles have the advantages of maneuverability, concealment, wide activity area and low cost of use. Therefore, they have broad application prospects. This makes unmanned surface vehicles a research hotspot at home and abroad, and the sensing technology is the basis for the unmanned surface vehicles to perform tasks. The perception technology based on optical vision has the advantages of convenient application, relatively low cost, easy data acquisition and large amount of information, and has been widely studied by scholars at home and abroad. This paper mainly discusses the research of optical vision in unmanned surface vehicles from five aspects: Firstly, the water surface image preprocessing based on unmanned surface vehicles, mainly including water surface image defogging enhancement research; second is the use of light vision target detection; the next is the surface target tracking methods. Finally, the light vision research of unmanned surface vehicles is summarized and forecasted.
Degenerate Sklyanin algebras, Askey–Wilson polynomials and Heun operators
Authors: Gaboriaud Julien , Tsujimoto Satoshi , Vinet Luc , Zhedanov Alexei
Published: August 2020

The q-difference equation, the shift and the contiguity relations of the Askey–Wilson polynomials are cast in the framework of the three and four-dimensional degenerate Sklyanin algebras

s
k
a

3

and

s
k
a

4

. It is shown that the q-para Racah polynomials corresponding to a non-conventional truncation of the Askey–Wilson polynomials form a basis for a finite-dimensional representation of

s
k
a

4

. The first order Heun operators defined by a degree raising condition on polynomials are shown to form a five-dimensional vector space that encompasses

s
k
a

4

. The most general quadratic expression in the five basis operators and such that it raises degrees by no more than one is identified with the Heun–Askey–Wilson operator.
An overview of methods for investigation of aeroelastic response on high aspect ratio fixed-winged aircraft
Authors: Ali Khan Muhammad Khizer , Javed Ali , Mumtaz Qadri Nafees , Mansoor Mohtasshim , Mazhar Farrukh
Published: August 2020

The thrust of increasing environmental and economic constraints on aircraft has enthused accelerated research in design of more economical and higher performance aircraft. Extensive experience in aerodynamic has established the use of high aspect ratio wings to improve the lift-to-drag ratio, a key parameter in determination of aircraft efficiency. Application of long slender wings has even more so intensified in the last decade due to emerging need for medium-to-high altitude long endurance (MALE/HALE) unmanned aerial vehicles (UAVs). However, such a wing comes at a trade-off of efficiency and safety. Longer wings tend of be more flexible and easily deform under load, hence are more vulnerable to the detrimental nature of aeroelastic effects. Divergence, control reversal and flutter are some major aeroelastic effects, which range from mere discomfort to complete destruction of body in flight. UAVs are most susceptible to this behaviour as their design incorporates very high aspect ratio wings. Numerous researches are available in literature which have focused on the explanation, calculation, and suppression of aeroelasticity; a subject which is as old as first heavier-than-air flight. This paper has attempted to cover the major aspect of aeroelasticity and summarize the state-of-the-art methods and approaches proposed by esteemed authors in this field for flutter prediction and suppression.
Data based sensing of Shale Oil yield in Oil Shale Retorting process
Authors: Chohan Hasan Qayyum , Ahmad Iftikhar
Published: August 2020

Oil shale is sedimentary organic rocks that are being converted into useful shale oil and shale gas. North American regions, Canada and China are exploring the oil shale reserves to accommodate the depletion of natural oil and gas resources. Oil shale retorting technology is being utilized to convert the shale rocks into shale oil and shale gas. The major product is oil that is further treated to convert it into gaseous form. In this study, machine learning techniques like ensemble learning (least square boosting and bagging) and artificial neural network (ANN) are employed for data sensing of oil shale retorting process and being compared. Data is generated for ensemble models through MATLAB-Excel-Aspen interfacing. The proposed framework shows that ANN provides higher accuracy as compare to other models for oil shale retorting process for efficient oil recovery.
Home Security and Automation Based on Internet of Things: A Comprehensive Review
Authors: Fatima Saman , Aiman Aslam Naila , Tariq Iqra , Ali Nouman
Published: August 2020

The current trends of research are focused on the use of the Internet of Things (IoT) for various real-time applications. IoT is a type of “universal global neural network” and very common because of its benefits in smart application trends over traditional communication trends. Information is now accessible much easily because of the internet and inexpensive. So security and automation become a need of every department and organization. The main objective of this study is to overcome the different face detection approaches in the IoT domain and their application in the automation of smart home devices. However, this review concludes the constraints and gaps of existing published work related to the current topic and point towards feasible future research directions. Furthermore, we have discussed possible challenges of large data processing, as well as communication and automation protocols by applying different sensors, other hardware, and their interoperability. Similarities and differences of various key factors are presented in tables in terms of the proposed model, technology, application, software, user interface, algorithm, hardware, and purpose, etc. In this study, we also discussed the pros and cons of various facial detection approaches and gaps of IoT in home automation. We suppose that this review will be a solid base for future researchers in the field of automation and facial detection in IoT.
Experimental study of railway bridge scouring and proposal of remedial measures-A case study of bridge number 30, Harrow River.
Authors: Sohail Javed Muhammad , Ejaz Naeem
Published: August 2020

Bridges are one of the most integral transportation components for connection of remote parts worldwide. The concern of every engineer is with their stability and collapse. One of the issues with bridge stability is bridge pier scouring in perennial and inundation canals as well as rivers, If not properly monitored and precautionary measures not adopted, it can result into bridge collapse. This paper makes an attempt to study the heavy bridge scouring in Railway Bridge (bridge # 30) on Harrow River located at downstream of Khanpur Dam, Pakistan. The study is carried out experimentally on scaled down model of bridge to study the behavior and patterns of scouring in the river bed during and after floods in two phases including 1) investigating the causes of scouring 2) provision and analysis of suitable remedial measures. The scouring that occurred in lab model matched the field patterns. Baffle walls and weir were provided separately as remedial measure but the former failed under initial watering while weir provided on downstream side reduced scouring by 95%.
Advancement of Inventive Solar Power Based Frameworks for Rural India
Authors: Muraleedharan Pillai Abhilash , Rajesh kanna R. , Raja singh R.
Published: August 2020

The nearness of solar energy at any area in a village or on a farm makes its utilization alluring for such an environment. This paper portrays the advancement and organization of inventive solar power based frameworks for use in rural networks of India. On-going and arranged solar power extends in India are constantly gone for creating plants for network applications. The proposed framework advancement depends on appropriated organization procedure. This methodology utilizes solar power in little units to fulfil a specific requirement for a village, similar to a home in a village, on the farm, or potentially an individual village occupant. Frameworks plans fuse financially savvy, measured, tough, long life, simple to keep up, and advantageous to utilize designs. The procedure proposed for recognizing the assembling configuration is an iterative one. In other words, that at first the model units are conveyed in villages to get input from clients and afterward the plan is changed and reused. The final product of this exertion is the recognizable proof of the last plan and assembling process.
Optimized energy management control over price-responsive demands
Authors: Loganathan N. , Shanmugapriya M. , Logeswaran Dr. T. , Dhanapal M.
Published: August 2020

The fair and efficient allocation for all energy management systems is one of the fundamental principles. In order to achieve optimum efficiency, classic allocation strategies aim to optimize the total surplus of customers. This paper proposes the procurement, storage and selling of energy at appropriate times with a new energy management algorithm. Uncertainty is modeled using PSO optimization techniques in relation to both DER production level and the price of energy obtained from / sold to the main grid. The test results show the advantages of the model in energy management performance for a cluster of cost-effective demands.
Analysis of Back To Back (BTB) Converter Control Strategies in Different Power System Applications
Authors: Pavan Babu Bandla , Indragandhi V
Published: August 2020

Power Quality (PQ) is an important term in many industries and other electrical power consumers. Maintaining of power quality during the operation of industries is an important task as the PQ issues may arise and cause the deviation in normal mode operation. In order to maintain the stability and mitigate the PQ issues, Back to Back (BTB) are mostly used in different power systems majorly in industries. This paper provides a major review on the BTB converters role in different power system configurations which are playing important role in facing the power quality issues such as voltage sags occurred in the system due to any faulty condition or short circuits, harmonic distortions, and some other abnormal conditions. Also in this paper, the various control strategies implemented in the BTB converter at their respective power system configurations are presented which will be helpful in developing the new methods or modifications in using BTB converters for power system applications.