bluuebunny/crossref_metadata_2025_split huggingface dataset:
Gain‐improved VHF broadband whip antenna loaded with radiation blades
Authors: Wang Hengfeng , Liu Chao , Xie Xu , Wu Huaning 
Published: July 2020

In this study, a new type of horizontal radiation blade structure is proposed and applied to the very high frequency (VHF) broadband whip antenna. The influence of the radius, length, number of branches of horizontal radiation blade and its distribution on the whip body on the electrical performance of the whip antenna is analysed separately to design a more suitable structure, and then an algorithm optimization of single loading and broadband matching network is carried out for further impedance matching. The simulation and measured results both show that compared with the existing broadband whip antenna, the gain and efficiency of the proposed antenna are significantly improved while maintaining a good voltage standing wave ratio (VSWR) over the frequency band of 30–300 MHz, all the VSWR are <3 with an average value of 2.0; all the maximum gain are >−3.5 dB, with an average value of 2.2 dB; and all the efficiency are >15%, with an average value of 47.7%; the pattern deviation in higher frequency is also suppressed to some extent. The proposed antenna has small size, wider bandwidth and higher radiation performance, which is suitable for vehicle‐borne and ship‐borne VHF communication.
Enhancing the performance of defected ground structure type near‐field radiofrequency WPT system by coupled‐line impedance matching
Authors: Verma Shalin , Rano Dinesh , Hashmi Mohammad 
Published: July 2020

This study reports, for the first time, the use of coupled‐line‐based impedance matching in wireless power transfer (WPT) system. The transmitter and receiver of the WPT system are realised by microstrip feed line and symmetric coupled line at the top plane. The ground plane is realised with triangular‐shaped defect along with the excitation slot mounted by an external capacitor. The defect in the ground plane and the external capacitor regulate the resonant frequency and also enable miniaturisation of the WPT system. The design is augmented with a systematic analytical approach for impedance matching and a simplified design procedure for the WPT system. A novel equivalent circuit model consisting of parallel LC network and coupled lines is also developed for the evaluation of the proposed WPT system design technique. A prototype of the system operating at 300 MHz developed on Rogers RO4350B substrate achieves a peak efficiency of 80% at a transmission distance of 17 mm. An excellent agreement between the measured and the electromagnetic simulated results is a testament of the robustness of the proposed design technique. Furthermore, evaluation of the commonly used WPT‐related figure of merit shows significant enhancement when compared to the existing state of the art.
Using classical Cepheids to study the far side of the Milky Way disk
Authors: Minniti J. H. , Sbordone L. , Rojas-Arriagada A. , Zoccali M. , Contreras Ramos R. , Minniti D. , Marconi M. , Braga V. F. , Catelan M. , Duffau S. , Gieren W. , Valcarce A. A. R. 
Published: July 2020

Context.Much of what we know about the Milky Way disk is based on studies of the solar vicinity. The structure, kinematics, and chemical composition of the far side of the Galactic disk, beyond the bulge, are still to be revealed.Aims.Classical Cepheids (CCs) are young and luminous standard candles. We aim to use a well-characterized sample of these variable stars to study the present-time properties of the far side of the Galactic disk.Methods.A sample of 45 Cepheid variable star candidates were selected from near-infrared time series photometry obtained by the VVV survey. We characterized this sample using high quality near-infrared spectra obtained with VLT/X-shooter. The spectroscopic data was used to derive radial velocities and iron abundances for all the sample Cepheids. This allowed us to separate the CCs, which are metal rich and with kinematics consistent with the disk rotation, from type II Cepheids (T2Cs), which are more metal poor and with different kinematics.Results.We estimated individual distances and extinctions using VVV photometry and period-luminosity relations, reporting the characterization of 30 CCs located on the far side of the Galactic disk, plus 8 T2Cs mainly located in the bulge region, of which 10 CCs and 4 T2Cs are new discoveries. The remaining seven stars are probably misclassified foreground ellipsoidal binaries. This is the first sizeable sample of CCs in this distant region of our Galaxy that has been spectroscopically confirmed. We use their positions, kinematics, and metallicities to confirm that the general properties of the far disk are similar to those of the well-studied disk on the solar side of the Galaxy. In addition, we derive for the first time the radial metallicity gradient on the disk’s far side. Considering all the CCs withRGC< 17 kpc, we measure a gradient with a slope of −0.062 dex kpc−1and an intercept of +0.59 dex, which is in agreement with previous determinations based on CCs on the near side of the disk.
Nichtentzündliche Muskelschmerzen
Authors: Roicke Hannes , Köhler Wolfgang , Baum Petra , Baerwald Christoph , Krasselt Marco 
Published: July 2020

AbstractMuscle pain as a common symptom in daily practice frequently occurs as a non-specific accompanying symptom in multiple internal and neurological diseases. Primarily inflammatory or autoimmune muscular diseases are causing muscle pain. However, a number of non-inflammatory causes of pain can also be considered for differential diagnosis. These are presented in this article. In principle, a distinction must be made between focal and diffuse muscle pain. As an invasive diagnostic procedure, a muscle biopsy should only be performed as the last step in the diagnostic alogorithm. If diffuse muscle pain is only associated with slight muscle weakness or is completely absent, there is usually a primary rheumatic cause. Statins (HMG-CoA reductase inhibitors) can lead to rhabdomyolysis, muscle fiber atrophy and muscle necrosis by damaging the muscle fiber membrane. Myotonias are autosomal dominant or autosomal recessive inherited disorders of muscle function. The genetic defect leads to pronounced muscle stiffness. The cause of metabolic myopathies can be disorders of the carbohydrate, fat or purine metabolism. Fibromyalgia syndrome (FMS) is a non-inflammatory disease and, according to the current knowledge, recognized as the result of an exposure to physical, biological and psychosocial factors (biopsychological disease model). To help diagnosing FMS, pain regions and core symptoms (fatigue, sleep disturbances) can be detected using questionnaires (Widespread Pain Index [WPI] and Symptom Severity Scale [SSS]).
Von der Deutschen Gesellschaft für Allgemein- und Viszeralchirurgie konsentierte Operationsindikationen beim duktalen Pankreasadenokarzinom
Authors: Belyaev Orlin , Bösch Florian , Brunner Maximilian , Müller-Debus Charlotte Friederieke , Radulova-Mauersberger Olga , Wellner Ulrich Friedrich , Grützmann Robert , Keck Tobias , Werner Jens , Witzigmann Helmut , Uhl Waldemar 
Published: July 2020

Zusammenfassung
Hintergrund Die Zahl der Operationen für Pankreaskarzinome in Deutschland nimmt kontinuierlich zu. Das entspricht der steigenden Inzidenz dieser Erkrankung in der Bevölkerung. Diese Übersichtsarbeit fasst die evidenzbasierten aktuellen Operationsindikationen bei Patienten mit Pankreaskarzinom zusammen.
Methode Als DGAV-Initiative wurde eine Arbeitsgruppe von Pankreasexperten eingerichtet. Diese formulierte konkrete Schlüsselfragen nach dem PICO-Schema, führte eine systematische Literatursuche in Medline und Cochrane Library (1989 – 2019) zu Studien und Leitlinien mit Aussagen zu Operationsindikationen bei Pankreaskarzinom durch und erstellte daraus resultierende evidenzbasierte Empfehlungen. Diese wurden innerhalb der CALGP im Rahmen eines Delphi-Verfahrens abgestimmt.
Ergebnisse Die Operationsindikation bei Pankreaskarzinom soll im Tumorboard von erfahrenen Pankreaschirurgen leitliniengerecht und unter Berücksichtigung der individuellen Besonderheiten der Patienten gestellt werden. Fortgeschrittene Infiltration der großen Viszeralgefäße, multiple Fernmetastasen und schwere Komorbiditäten, die einen Eingriff in Vollnarkose verbieten, stellen die häufigsten Kontraindikationen zur Operation dar. Die Therapie von Borderline-resektablen und primär resektablen oligometastatischen Patienten sowie solchen mit sekundärer Resektabilität nach neoadjuvanter Behandlung soll bevorzugt an Zentren und im Rahmen von Studien erfolgen. Die Behandlung an Pankreaszentren reduziert die Mortalität und verbessert das Überleben. Die palliative Bypasschirurgie kann bei endoskopisch nicht therapierbaren Gallenwegs- und Duodenalobstruktionen indiziert sein. Bei diagnostischen Schwierigkeiten kann die Staging-Laparoskopie mit histologischer Sicherung
eingesetzt werden.
Schlussfolgerung Unabhängig von der Entwicklung erfolgversprechender multimodaler Behandlungskonzepte bleibt die chirurgische Resektion weiterhin der einzig kurative Therapieeinsatz. Wegen des hohen Anteils von primär fortgeschrittenen und metastasierten Pankreaskarzinomen spielt auch die palliative Chirurgie weiterhin eine wichtige Rolle in der komplexen Versorgung dieses Patientenkollektivs.
Leadership in Surgical Residency
Authors: Kostka Ryan , Fleshman James W. 
Published: July 2020

AbstractSurgical training can be compared with a functioning military unit with chain of command, responsibility/accountability relationship, and graduated leadership assignments. Proficiency, commitment, communication, consistency, ownership, relationships, confidence, humility, feedback and evaluation, exemplary behavior, empathy, and humanity are all aspects of leadership. Leadership skills developed in the protected environment of residency are the basis for a successful career.
Content Validity of the LIMB-Q: A Patient-Reported Outcome Instrument for Lower Extremity Trauma Patients
Authors: Mundy Lily R. , Klassen Anne , Sergesketter Amanda R. , Grier Andrew Jordan , Carty Matthew J. , Hollenbeck Scott T. , Pusic Andrea L. , Gage Mark J. 
Published: July 2020

Abstract
Background Limb-threatening lower extremity traumatic injuries can be devastating events with a multifaceted impact on patients. Therefore, evaluating patient-reported outcomes (PROs) in addition to traditional surgical outcomes is important. However, currently available instruments are limited as they were not developed specific to lower extremity trauma patients and lack content validity. The LIMB-Q is being developed as a novel PRO instrument to meet this need, with the goal to measure all relevant concepts and issues impacting amputation and limb-salvage patients after limb-threatening lower extremity trauma.
Methods This is a qualitative interview-based study evaluating content validity for the LIMB-Q. Patients aged 18 years and older who underwent amputation, reconstruction, or amputation after failed reconstruction were recruited using purposeful sampling to maximize variability of participant experiences. Expert opinion was solicited from a variety of clinical providers and qualitative researchers internationally. Preliminary items and scales were modified, added, or removed based on participant and expert feedback after each round of participant interviews and expert opinion.
Results Twelve patients and 43 experts provided feedback in a total of three rounds, with changes to the preliminary instrument made between each round. One scale was dropped after round one, one scale was added after round two, and only minor changes were needed after round three. Modifications, additions and removal of items, instructions, and response options were made after each round using feedback gathered.
Conclusion The LIMB-Q was refined and modified to reflect feedback from patients and experts in the field. Content validity for the LIMB-Q was established. Following a large-scale field test, the LIMB-Q will be ready for use in research and clinical care.
The Effect of Comprehensive Video-Assisted Epilepsy Education on Drug Adherence and Self-Care in People with Epilepsy
Authors: Jothi Arul , Ramamoorthy Lakshmi , Nair Pradeep P. 
Published: July 2020

Abstract

Background Epilepsy is a chronic neurological disorder which needs proper drug adherence and follow-up care to control the recurrent seizure events as one of the most common reasons for “breakthrough” seizures is nonadherence to antiepileptic drugs. In addition to usual therapeutic management, patients are encouraged to involve in epilepsy self-management by understanding the nature of the disease and its control measures to prevent the complications.

Methods A single group experimental design (pretest–posttest) was conducted to evaluate the effect of comprehensive video-assisted teaching program on self-care efficacy and level of knowledge of patients with epilepsy. Data was collected by direct interview with Epilepsy Self-Management Scale and epilepsy knowledge questionnaire. A video-assisted teaching covering all aspects of epilepsy was given on the day of pretest. At the interval of 3 months, the level of drug adherence, self-care, and knowledge level were assessed.

Results Majority of the study participants (47.1%) belonged to the age group between 19 and 30 years, 54.3% participants were male, majority of them (70%) had tonic-clonic seizure, and 40% of them reported the onset of seizures as above 20 years. Eighty-seven percent of participants had no family history of seizures or epilepsy. Note that 38.6% of the participants had at least one seizure episode/month. Majority of the caregivers were either parents (41.4%) or spouse (48.6%). The study revealed that, following video-assisted teaching, the proportion of participants with adequate knowledge has increased from 14 to 64.3%. Similarly, the percentage of participants who had good drug adherence increased from 52 to 65% and no participant had poor drug adherence. Participants who had high level of self-care increased from 71.4 to 88.6%.

Conclusion To overcome the poor drug adherence-related complications, people with epilepsy are to be personally educated adequately to increase the factual information about the condition and their self-care practices.
Occupational and leisure‐time physical activity decreases the odds of disability in older adults: Prospective study
Authors: Dos Santos Vanessa Ribeiro , Alberto Gobbo Luís 
Published: July 2020

AbstractAging decreases physical function which can increase dependence in activities of daily living (ADL) and disability. However, physical activity (PA) may improve physical function and prevent disability in older adults. In addition, it is important to emphasize that research concerning the domains in which PA is practiced and the benefits for physical function of older adults is also important for the elaboration of preventative health measures for this population. Thus, the aim of this study was to analyse the association of total PA and PA in different domains and odds of disability in older adults in a 24‐month follow‐up. The study included 211 older adults, aged ≥60 years (72 ± 7 years, 72% women). Handgrip strength was measured using a digital dynamometer, gait speed and chair stand by functional tests. PA and dependence in ADL were self‐reported. Older adults who remained sufficiently active in the occupational (OR:0.11;CI95%:0.01–0.93, OR:0.21;CI95%:0.07–0.69, and OR:0.13;CI95%:0.05–0.34) domain presented protection for high dependence in basic (BADL), instrumental (IADL) and advanced (AADL), respectively, as well as in total ADL (OR:0.25;CI95%:0.07–0.92). Older adults who remained sufficiently active in the leisure‐time exercise (OR:0.28;CI95%:0.11–0.72, OR:0.44;CI95%:0.20–0.93 and OR:0.15;CI95%:0.04–0.49) domain presented protection for high dependence in IADL, AADL and total ADL, respectively. Moreover, older adults who remained sufficiently active in total PA (OR:0.11;CI95%:0.01–0.94, OR:0.30;CI95%:0.11–0.80 and OR:0.21CI95%:0.10–0.46) presented protection for high dependence in BADL, IADL and AADL, respectively, as well as in total ADL (OR:0.28;CI95%:0.09–0.86). The odds of disability are lower in older adults who are sufficiently active, especially in occupational and leisure‐time exercise domains.
Measurement of sensory deficiency in fine touch after stroke during textile fabric stimulation by electroencephalography (EEG)
Authors: Huang Yanhuan , Jiao Jiao , Hu Junyan , Hsing Chihchia , Lai Zhangqi , Yang Yang , Hu Xiaoling 
Published: July 2020

AbstractObjectiveSensory deficiency of fine touch limits the restoration of motor functions after stroke, and its evaluation was seldom investigated from a neurological perspective. In this study, we investigated the cortical response measured by electroencephalography (EEG) on the fine touch sensory impairment during textile fabric stimulation after stroke.ApproachBoth participants with chronic stroke (n = 12, stroke group) and those unimpaired (n = 15, control group) were recruited. To investigate fine touch during textile fabric stimulations, full brain EEG recordings (64-channel) were used, as well as the touch sensation questionnaires based on the American Association of Textile Chemists and Colorists (AATCC) Evaluation Procedure 5. During the EEG measurement, relative spectral power (RSP) and EEG topography were used to evaluate the neural responses toward the fabric stimuli. In the subjective questionnaire, the fine touch for fabric stimuli was rated and represented by 13 different sensation parameters. The correlation between the fine touch evaluated by the EEG and the questionnaire was also investigated.Main resultsThe neural responses of individuals with fine touch impairments after stroke were characterized by a shifted power spectrum to a higher frequency band, enlarged sensory cortical areas and higher RSP intensity (P < 0.05). Asymmetric neural responses were obtained when stimulating different upper limbs for both unimpaired participants and stroke participants (P < 0.05). The fine touch sensation of the stroke participants was impaired even in the unaffected limb. However, as a result of different neural processes, the correlation between the EEG and the questionnaire was weak (r < 0.2).SignificanceEEG RSP was able to capture the varied cortical responses induced by textile fabric fine touch stimulations related to the fine touch sensory impairment after stroke.
Brittle failure of incompressible material in plane strain
Authors: Chanyshev AI , Belousova OE , Lukyashkina OA 
Published: July 2020

Abstract
The stress–strain behavior of rock mass under plane strain is studied in the cases of incompressibility and perfect brittle failure. The characteristics of of differential equations of equilibrium and the relations at them are obtained using the condition of coaxiality of the stress and strain tensors. The boundary problem is formulated for determining the stress–strain behavior in the failure zone of rocks. By way of illustration, the equations of the perfect brittle post-limit deformation of rock mass in the form of a rectangular plate (pillar) under uniform compression are analyzed. It is shown that by monitoring displacement of the side boundary of the plate, it is possible to predict the plate failure.
One-step fabrication of an anti-corrosion superhydrophobic surface on stainless steel
Authors: Zhu Jiyuan , Wu Jianmao 
Published: July 2020

Abstract
A one-step laser-processing method is employed on a common laser making machine to develop superhydrophobic surfaces on stainless steel. Without any surface modification, the laser-textured substrates obtained superhydrophobicity after kept in sealing bags for 12 days. The average contact angle value of the as-prepared samples is above 150°. The superhydrophoic surfaces possess good self-cleaning and anti-corrosion properties. The facile, cost-effective and eco-friendly method will have great potential in the mass-production of superhydrophobic surfaces.
Experimental strategies to increase ammonia yield in plasma catalysis over LTA and BEA zeolites
Authors: Gorky Fnu , Carreon Moises A , Carreon Maria L 
Published: July 2020

Abstract
Herein we demonstrate the synthesis of ammonia via atmospheric DBD plasma discharge over LTA and BEA zeolites. The presence of the zeolite in the DBD reactor promoted the ammonia formation at low temperature. The zeolites dielectric constant and pore size greatly influenced the ammonia yields. Ammonia yields of 5.31% for zeolite beta and 5.22% for zeolite 5A were observed, which are at least 4 times higher than the yield obtained in the absence of the zeolites.
Marginal Mandibular Nerve Mapping Prior to Nonablative Radiofrequency Skin Tightening
Authors: DiBernardo Gabriella A , DiBernardo Barry E , Wu Douglas , Cook Jonathan 
Published: July 2020

Abstract

Background
Aging skin and increased skin laxity is a prevalent concern of patients. Nonsurgical treatments, such as radiofrequency, are increasing in popularity due to decreased pain, downtime, and scarring. ThermiRF (Thermi, Irving, TX) is a subdermal radiofrequency treatment for tightening skin. When applying radiofrequency treatments to the neck, it is important to avoid ablating the marginal mandibular nerve and causing nerve trauma.

Objectives
The purpose of this study was to locate and record the position of the marginal mandibular nerve in 72 patients undergoing subdermal radiofrequency skin tightening, to determine how often the nerve correlates to its textbook anatomic position.

Methods
Marginal mandibular nerves were located with a nerve stimulator and marked with the subject in both upright and recumbent positions. Photographs were taken and the nerve position in relation to the mandible was recorded.

Results
The marginal mandibular nerve was in its correct anatomic position above the mandible in 18% of patients. Nerve position did not shift between the upright and recumbent positions. Only 10% of patients had left-right nerve symmetry.

Conclusions
To avoid nerve injuries, nerve mapping prior to nonablative radiofrequency treatment is recommended. The marginal mandibular nerve is not always in its correct anatomic position or symmetric to the opposing side. Its location cannot be assumed from the textbook anatomic position or from a single-side mapping.

Level of Evidence: 4
Prognosis and personalized treatment prediction in TP53-mutant hepatocellular carcinoma: an in silico strategy towards precision oncology
Authors: Yang Chen , Huang Xiaowen , Li Yan , Chen Junfei , Lv Yuanyuan , Dai Shixue 
Published: July 2020

Abstract
TP53 mutation is one of the most common genetic changes in hepatocellular carcinoma (HCC). It is of great clinical significance to tailor specialized prognostication approach and to explore more therapeutic options for TP53-mutant HCCs. In this study, a total of 1135 HCC patients were retrospectively analyzed. We developed a random forest-based prediction model to estimate TP53 mutational status, tackling the problem of limited sample size in TP53-mutant HCCs. A multi-step process was performed to develop robust poor prognosis-associated signature (PPS). Compared with previous established population-based signatures, PPS manifested superior ability to predict survival in TP53-mutant patients. After in silico screening of 2249 drug targets and 1770 compounds, we found that three targets (CANT1, CBFB and PKM) and two agents (irinotecan and YM-155) might have potential therapeutic implications in high-PPS patients. The results of drug targets prediction and compounds prediction complemented each other, presenting a comprehensive view of potential treatment strategy. Overall, our study has not only provided new insights into personalized prognostication approaches, but also thrown light on integrating tailored risk stratification with precision therapy.