bluuebunny/crossref_metadata_2025 huggingface dataset:
The fallacy of indexed effective orifice area charts to predict prosthesis–patient mismatch after prosthesis implantation
Authors: Vriesendorp Michiel D , De Lind Van Wijngaarden Rob A F , Head Stuart J , Kappetein Arie-Pieter , Hickey Graeme L , Rao Vivek , Weissman Neil J , Reardon Michael J , Moront Michael G , Sabik Joseph F , Klautz Robert J M
Published: February 2020

Aims 

Indexed effective orifice area (EOAi) charts are used to determine the likelihood of prosthesis–patient mismatch (PPM) after aortic valve replacement (AVR). The aim of this study is to validate whether these EOAi charts, based on echocardiographic normal reference values, can accurately predict PPM.

Methods and results 

In the PERIcardial SurGical AOrtic Valve ReplacemeNt (PERIGON) Pivotal Trial, 986 patients with aortic valve stenosis/regurgitation underwent AVR with an Avalus valve. Patients were randomly split (50:50) into training and test sets. The mean measured EOAs for each valve size from the training set were used to create an Avalus EOAi chart. This chart was subsequently used to predict PPM in the test set and measures of diagnostic accuracy (sensitivity, specificity, and negative and positive predictive value) were assessed. PPM was defined by an EOAi ≤0.85 cm2/m2, and severe PPM was defined as EOAi ≤0.65 cm2/m2. The reference values obtained from the training set ranged from 1.27 cm2 for size 19 mm up to 1.81 cm2 for size 27 mm. The test set had an incidence of 66% of PPM and 24% of severe PPM. The EOAi chart inaccurately predicted PPM in 30% of patients and severe PPM in 22% of patients. For the prediction of PPM, the sensitivity was 87% and the specificity 37%. For the prediction of severe PPM, the sensitivity was 13% and the specificity 98%.

Conclusion 

The use of echocardiographic normal reference values for EOAi charts to predict PPM is unreliable due to the large proportion of misclassifications.
Hepatitis C Virus Treatment as Prevention: Challenges and Opportunities in Men Who Have Sex With Men
Authors: Rockstroh Jürgen Kurt , Boesecke Christoph
Published: February 2020

Since 2002, a global epidemic of acute hepatitis C virus (HCV) infection has been noted in men who have sex with men (MSM). Transmission of HCV, particularly in the context of traumatic sex practices that increase the risk of blood-blood contacts (eg, anal sex and fisting), was initially found in human immunodeficiency virus (HIV)–coinfected and more recently in HIV-uninfected MSM, especially those receiving pre-exposure prophylaxis (PrEP). Early HCV treatment with all-oral direct-acting antiviral combination therapy has been associated with very high HCV cure rates of up to 100%. Indeed, immediate treatment of recently acquired HCV directly after new HCV diagnosis, or after 4 weeks if no 2-log10 drop in HCV RNA level occurs, promises rapid HCV elimination. Reports from the Netherlands, Switzerland, and the United Kingdom all show that with increased treatment uptake in this particular patient group, dramatic reductions in new HCV infections can be achieved. A general consensus on how to best screen for and manage acute HCV infections, along with broad access to rapid HCV therapy initiation, is crucial to attaining HCV elimination, a goal that is challenged by high HCV reinfection rates among MSM.
Feeding behavior of grow-finish swine and the impacts of heat stress
Authors: Cross Amanda J , Brown-Brandl Tami M , Keel Brittney N , Cassady Joseph P , Rohrer Gary A
Published: February 2020

Heat stress has negative impacts on pork production, particularly in the grow-finish phase. During heat stress events, the feeding behavior of pigs is altered to reduce heat production. Several different systems have been developed to study feeding behavior. Most systems are not accurate representations of grow-finish commercial production as feed intake is monitored for only one pig at a time. The objective of this study was to utilize a feed monitoring system, representative of commercial conditions, to determine feeding behavior patterns of grow-finish pigs throughout the year and to identify changes that occurred during heat stress events. Feeder visit data were collected on barrows and gilts (n = 932) from three different sire breeds, Landrace, Yorkshire, and Duroc, between May 2014 and April 2016. Days in the study were partitioned into groups based on their maximum temperature–humidity index (THI), where a THI less than 23.33 °C was classified as “Normal”, a THI between 23.33 and 26.11 °C was classified as “Alert”, a THI between 26.11 and 28.88 °C was classified as “Danger”, and a THI greater than 28.88 °C was classified as “Emergency”. Feeding behavioral differences among breeds and sex were observed across all THI categories. Landrace-sired pigs had fewer feeder visits compared to Duroc- and Yorkshire-sired pigs. Gilts had fewer feeder visits than barrows in all THI categories. Differences in feeding behavior patterns between THI categories demonstrated that heat stress reduced the feeding duration of Landrace-sired pigs without any dramatic effects on the other pigs in the study. During elevated temperatures, all pigs tended to increase feeding events during the early (03:00–05:59) and late (18:00–20:59) periods of the day. Utilizing a feed monitoring system that is a more accurate representation of commercial conditions will lead to a greater understanding of feeding behavior among breed types and sexes during heat stress, allowing producers to enhance their ability to properly care for their pigs during both normal and heat stress events.
The femoral deformity in Blount’s disease: a comparative study of infantile, juvenile and adolescent Blount’s disease
Authors: Firth Gregory Bodley , Ngcakani Anati , Ramguthy Yammesh , Izu Alane , Robertson Anthony
Published: February 2020

An associated femoral deformity in patients with Blount’s disease is not commonly described in the literature. The objective of this study is to establish the presence and magnitude of deformity in the coronal plane of the distal femur in children of all ages with Blount’s disease and compare this to a matched cohort of children from the same population. This was a retrospective review of patients from an academic hospital. A control group was established by matching for age and gender from a group of unaffected patients with mid to proximal third femur fractures or controls at the same hospital. Study participants were categorized by age at onset of deformity as follows: infantile (<4 years), juvenile (4–10 years) and adolescent (>10 years). The measurements of the anatomic lateral distal femoral angle (aLDFA) were recorded and the Wilcoxon rank-sum test was used to determine statistically significant differences in the LFDA between children with Blount’s disease and those without. Seventy-two Black African children were included in the study with 118 affected limbs (27 infantile, 55 juvenile and 36 adolescent). The overall average aLDFA for all patients with Blount’s disease was 87° (range 73–100°). Overall, children with Blount’s disease had a higher aLDFA than children without (87° vs. 82°). There was a significant association between LDFA in the control group and children with Blount’s disease in each of the three groups. This study found distal femoral varus deformity to be present in all groups of children with Blount’s disease. In this study population, it was most significant in the infantile and adolescent groups when compared to a control group from the same population. Although further studies are required, the surgeon must always assess the distal femoral component in treating children with Blount’s disease.
Surgical Method of a Corner Mouth Lift
Authors: Jeong Tae-Kwang
Published: February 2020

Background:

The mouth and perioral area play a primary role in emotional expression, and these are among the most important areas projecting youth and attractiveness. A downturned corner of the mouth presents negative feelings such as sadness, depression, and tiredness. A corner mouth lift (CML) may restore more attractive and youthful appearance, which can favorably affect first impression, self-esteem, and the quality of life in patients.

Methods:

From December 2016 to September 2018, 498 patients underwent a CML. There were 434 women and 64 men. The mean age was 38.99 years (19–63 years) and 34.19 years (21–67 years) in female and male patients, respectively. A total of 432 cases (86.7%) were primary surgical cases, whereas 66 (13.3%) were secondary cases. There were 178 patients (35.7%) who only underwent CML, whereas the remaining patients (64.3%) underwent the CML contemporarily with other perioral surgery such as subnasal lift.

Results:

Most patients were satisfied with the results. However, some patients showed unsatisfactory outcomes such as hypertrophic scar, asymmetry, persistent swelling, or undercorrection. The most common complaints immediately after surgery were swelling and bruise, which were improved spontaneously within 1–2 weeks. Postoperative scar and undercorrection were the most common complications that required revision surgery.

Conclusions:

CML showed reliable and satisfactory outcomes in most patients. It could be a good option for patients who desire CML regardless of their age.
Implementing a Comprehensive Preceptor Development Program Through Professional Governance
Authors: McKinney Sabrina , Aguilar Monica
Published: February 2020

Precepting is a demanding but important role for successful onboarding in healthcare institutions. However, preceptors face many challenges, including inconsistent formal training, selection, and evaluation. One health system took a unique approach to this challenge by developing a transition to practice preceptor program through the institution’s professional governance culture. Program components include clearly outlined selection criteria, formal initial preparation, competency verification, resources, and recognition for preceptors.
Epidemiology of Pediatric Upper Extremity Fractures in a Tertiary Care Center in Switzerland
Authors: Merckaert Sophie , Chaibi Emmelie , Meriem Samir , Kwiatkowski Barbara , Divjak Natalie , Zambelli Pierre-Yves
Published: February 2020

Objective

Fractures in children are common and account for 10% to 25% of injuries in children with considerable effects on activity restriction and subsequent high socioeconomically impact. Eighty percent of all fractures in children occur at the upper extremity. The article investigates the epidemiology and fracture pattern of the upper extremity within a pediatric population consulting a tertiary referral hospital in Switzerland.

Methods

Study population included all patients younger than 18 years presenting with an upper extremity fracture. Recorded data were age, sex, side, season of the year, mechanism, type of fracture, and applied treatment.

Results

Fractures of the upper extremities represented 76% with a mean age of 9 years and 7 months. Compared with girls, boys had a risk ratio of 1.35 (1.14–1.6) of having a traumatic injury. The radius, with 298 fractures (37%), was the most injured bone. Overall simple fall from his or her height and soccer represented the main injury mechanisms accounting for 26% and 9%, respectively. Eighty-six percent of fractures were treated by cast with or without closed reduction, 11% (92) by closed reduction and pinning or elastic stable intramedullary, and only 3% of fractures were treated by open reduction and internal fixation.

Conclusions

Eighty-six percent of all fractures could be treated by conservative methods. Only 17% need surgical treatments by orthopedic surgeons. This shows how important it is to train residents in pediatrics for the treatment of upper limb fractures in children.
SRRF ‘n’ TIRF - FCS: Simultaneous spatiotemporal super-resolution microscopy
Authors: Sankaran Jagadish , Balasubramanian Harikrushnan , Tang Wai Hoh , Ng Xue Wen , Röllin Adrian , Wohland Thorsten
Published: February 2020

Super-resolution microscopy and single molecule fluorescence spectroscopy require mutually exclusive experimental strategies optimizing either time or spatial resolution. To achieve both, we implement a GPU-supported, camera-based measurement strategy that highly resolves spatial structures (~60 nm), temporal dynamics (≤ 2 ms), and molecular brightness from the exact same data set. We demonstrate the applicability and advantages of multi-parametric measurements to monitor the super-resolved structure and dynamics of two different biomolecules, the actin binding polypeptide LifeAct, and the epidermal growth factor receptor (EGFR). Simultaneous super-resolution of spatial and temporal details leads to an improved precision in estimating the diffusion coefficient of LifeAct in dependence of the cellular actin network. Multi-parametric analysis suggests that the domain partitioning of EGFR is primarily determined by EGFR-membrane interactions, possibly sub-resolution clustering and inter-EGFR interactions but is largely independent of EGFR-actin interactions. These results demonstrate that pixel-wise cross-correlation of parameters obtained from different techniques on the same data set enables robust physicochemical parameter estimation and provides new biological knowledge that cannot be obtained from sequential measurements.
High-pressure developments for resonant X-ray scattering experiments at I16
Authors: Povedano I. , Bombardi A. , Porter D. G. , Burt M. , Green S. , Kamenev K. V.
Published: February 2020

An experimental setup to perform high-pressure resonant X-ray scattering (RXS) experiments at low temperature on I16 at Diamond Light Source is presented. The setup consists of a membrane-driven diamond anvil cell, a panoramic dome and an optical system that allows pressure to be measured in situ using the ruby fluorescence method. The membrane cell, inspired by the Merrill–Bassett design, presents an asymmetric layout in order to operate in a back-scattering geometry, with a panoramic aperture of 100° in the top and a bottom half dedicated to the regulation and measurement of pressure. It is specially designed to be mounted on the cold finger of a 4 K closed-cycle cryostat and actuated at low-temperature by pumping helium into the gas membrane. The main parts of the body are machined from a CuBe alloy (BERYLCO 25) and, when assembled, it presents an approximate height of 20–21 mm and fits into a 57 mm diameter. This system allows different materials to be probed using RXS in a range of temperatures between 30 and 300 K and has been tested up to 20 GPa using anvils with a culet diameter of 500 µm under quasi-cryogenic conditions. Detailed descriptions of different parts of the setup, operation and the developed methodology are provided here, along with some preliminary experimental results.
Managing making and makers in open-access craft studios: the case of Turning Earth
Authors: England Lauren Elizabeth
Published: February 2020

Purpose

The aim of this paper is to develop understanding of how open-access (OA) studios as creative social enterprises (CSEs) can negotiate coexisting creative, social and economic missions, and manage the motivations of stakeholders. In particular, it explores how this affects management practices and ways in which diverse social actors engage with the organisation and each other. This paper expands on the existing literature on social enterprises in relation to multiple value and stakeholder management and also contributes to the makerspace and wider creative industries literature.

Design/methodology/approach

This paper uses a qualitative, single-case case study of an OA studio established as a social enterprise based on analysis of secondary texts, interviews and observation.

Findings

It is identified that a multifaceted value system creates both challenges and opportunities in relation to communal resource management and community development. Tensions between the creative and economic priorities of members and both the economic imperatives of the organisation and its social mission are also highlighted. It is suggested that despite these challenges, the OA model presents an opportunity to develop more collective forms of creative practice and support a reframing of the creative economy.

Research limitations/implications

As a single case study in the geographical context of the United Kingdom, limited generalisations on OA management in other countries can be made without further investigation.

Practical implications

There are practical implications for OA and other CSE founders in relation to resource and membership management and facilitating inclusive access. There are creative industries policy implications in the encouragement of more sustainable collaborative approaches.

Originality/value

This paper contributes to the literature on social entrepreneurship, makerspaces and the creative industries by developing the understanding of OA studios and CSE management and the internal dynamics that influence organisational and social outcomes.
The derived neutrophil‐to‐lymphocyte ratio is an independent prognostic factor in patients with angioimmunoblastic T‐cell lymphoma
Authors: Hong Huangming , Fang Xiaojie , Huang He , Wang Zhao , Lin Tongyu , Yao Herui
Published: February 2020

To determine whether inflammatory markers, derived neutrophil‐to‐lymphocyte ratio (dNLR), haemoglobin/platelet ratio (HPR) or platelet/lymphocyte ratio (PLR) are predictive for prognosis in angioimmunoblastic T‐cell lymphoma (AITL), we derived dNLR, HPR and PLR values for 110 AITL patients and appropriate cut‐off point values to define overall survival (OS) and progression‐free survival (PFS). dNLR ≥ 2·2, HPR ≥ 0·4 or PLR < 100 were significant factors for shorter OS and PFS. On univariate analysis, these three parameters were significantly associated with worse OS and PFS. On multivariate analysis, only dNLR remained a significant, independent prognostic factor for both OS and PFS.
Where do Remittances Go in Household Consumption? Empirical Evidence from Sri Lanka‐Wide Micro‐data
Authors: Samaratunge Ramanie , Kumara Ajantha Sisira , Abeysekera Lakmal
Published: February 2020

Private internal and international remittances are a major source of household money in Sri Lanka, yet their impact on household welfare has long been a research gap. Based on the Migration and Development Theory, this article examines how private remittances affect household expenditure behaviour, using nationally representative microdata and applying quasi‐experimental methods. Private remittances have significantly increased household per‐capita expenditure and initiated positive behavioural changes via increased allocations for basic needs, human and physical capital investment. Compared with internal remittances, the impact of international remittance shows a strong potential for reducing poverty incidence and improving people's well‐being: households in richer/richest expenditure quartiles and urban households invest in education, which supports the country's long‐standing record of education. Rural households demonstrate favourable changes in spending behaviour with receiving private remittances. From a public policy standpoint, government favours migration so that remittances are more likely to flow. A proper remittance‐transfer mechanism to encourage smooth remittance is thus required.
Designer genetically encoded voltage‐dependent calcium channel inhibitors inspired by RGK GTPases
Authors: Colecraft Henry M.
Published: February 2020

High‐voltage‐activated calcium (CaV1/CaV2) channels translate action potentials into Ca2+ influx in excitable cells to control essential biological processes that include; muscle contraction, synaptic transmission, hormone secretion and activity‐dependent regulation of gene expression. Modulation of CaV1/CaV2 channel activity is a powerful mechanism to regulate physiology, and there are a host of intracellular signalling molecules that tune different aspects of CaV channel trafficking and gating for this purpose. Beyond normal physiological regulation, the diverse CaV channel modulatory mechanisms may potentially be co‐opted or interfered with for therapeutic benefits. CaV1/CaV2 channels are potently inhibited by a four‐member sub‐family of Ras‐like GTPases known as RGK (Rad, Rem, Rem2, Gem/Kir) proteins. Understanding the mechanisms by which RGK proteins inhibit CaV1/CaV2 channels has led to the development of novel genetically encoded CaV channel blockers with unique properties; including, chemo‐ and optogenetic control of channel activity, and blocking channels either on the basis of their subcellular localization or by targeting an auxiliary subunit. These genetically encoded CaV channel inhibitors have outstanding utility as enabling research tools and potential therapeutics.

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Wnt-mediated endothelial transformation into mesenchymal stem cell–like cells induces chemoresistance in glioblastoma
Authors: Huang Menggui , Zhang Duo , Wu Janet Y. , Xing Kun , Yeo Eujin , Li Chunsheng , Zhang Lin , Holland Eric , Yao Lutian , Qin Ling , Binder Zev A. , O’Rourke Donald M. , Brem Steven , Koumenis Constantinos , Gong Yanqing , Fan Yi
Published: February 2020

Glioblastoma-associated endothelial cells transform into mesenchymal stem cell–like cells via Wnt/β-catenin, inducing tumor resistance to chemotherapy.
Effectiveness of a clinic-based randomized controlled intervention for type 2 diabetes management: an innovative model of intensified diabetes management in Mainland China (C-IDM study)
Authors: Lou Qinglin , Ye Qing , Wu Haidi , Wang Zhiyong , Ware Robert S , Xiong Yaqing , Xu Fei
Published: February 2020

Objectives

Highly efficient diabetes management programs are needed for tackling diabetes in China. This study aimed to assess the effectiveness of a clinic-based intensified diabetes management model (C-IDM) in Mainland China.

Research design and methods

A 2-year clinic-based randomized controlled trial was conducted among patients with type 2 diabetes in Nanjing, China. The C-IDM intervention components comprised four domains (disease targeting management, express referral channel, expert visit, patients’ self-management) and an integrated running system (disease control centers, general hospitals and local clinics). Control group participants received their usual care, while intervention participants received both the C-IDM package and the usual services. The primary outcome variable was change of hemoglobin A1c (HbA1c). Mixed-effects models were used to compute effect estimates and 95% CI with consideration of both individual and cluster-level confounders.

Results

Overall, 1095 of 1143 participants were assessed at study completion. The mean change in HbA1c was significantly greater in the intervention group than in the control group (mean difference (MD)=−0.57, 95% CI −0.79 to –0.36). Similar results were observed for change in body mass index (MD=−0.29, 95% CI −0.49 to –0.10). Participants in the intervention group were more likely to achieve normal HbA1c and body weight compared with their counterparts in control group after adjusting for potentially confounding variables (adjusted OR=1.94, 95% CI 1.35 to 2.81 and 1.79, 95% CI 1.13 to 2.85, respectively).

Conclusions

The C-IDM model is feasible and effective in large-scale management of patients with type 2 diabetes in China. It has public health implications for tackling the burden of diabetes in China.

Trial registration number

ChiCTR-IOR-15006019.
Electroacupuncture for treatment-resistant insomnia: study protocol for a randomised, controlled, assessor-blinded, pilot clinical trial
Authors: Lim Jung-Hwa , Kim Kyung-Ok , Kim Sang-Ho , Kang Chang-Wan , Kim Bo-Kyung
Published: February 2020

Introduction

A considerable number of insomnia patients experience sleep disturbance even with long-term use of hypnotic medication. Previous studies have indicated that electroacupuncture (EA) could be an efficacious treatment for managing insomnia. However, few trials have been conducted to evaluate the effectiveness and safety of EA for treatment-resistant insomnia. This pilot study aims to explore the feasibility and preliminary effectiveness and safety of EA as an adjunct treatment for treatment-resistant insomnia.

Methods and analysis

This is a multicentre, randomised, usual care controlled and assessor-blinded pilot study protocol. Fifty patients presenting with sleep problems who have been taking hypnotic medication for more than 3 months will be randomly allocated to either an EA group or a usual care group at a 1:1 ratio. The EA group will undergo 12 EA treatment sessions twice a week for 6 weeks whereas the usual care group will not receive EA treatment. All the participants will receive a brochure containing educational information on sleep hygiene. The primary outcome will be the measured mean change of the total score of the Insomnia Severity Index from the baseline to week 7. The secondary outcome regarding sleep quality will be measured using the Pittsburgh Sleep Quality Index, a sleep diary and actigraphy. Moreover, we will assess the quality of life, the direct and indirect cost of treating insomnia for economic evaluation. After 4 weeks, the subjects will visit the research sites for a follow-up assessment.

Ethics and dissemination

Ethical approval of this study protocol was established by the institutional review boards of the each involved study site. All potential subjects will be provided written informed consent. The results of this study will be accessible in peer-reviewed publications and be presented at academic conference.

Trial registration number

KCT0003235.
Comparison of iRECIST versus RECIST V.1.1 in patients treated with an anti-PD-1 or PD-L1 antibody: pooled FDA analysis
Authors: Mulkey Flora , Theoret Marc R , Keegan Patricia , Pazdur Richard , Sridhara Rajeshwari
Published: February 2020

Background

Response criteria developed when cytotoxic chemotherapy was the predominant therapeutic modality to treat patients with cancer, do not capture the full spectrum of tumor response patterns observed with anti-PD-1/PD-L1 antibody treatment. iRECIST was developed to capture both typical and atypical response patterns.

Methods

Target, non-target, and new lesion measurements for 7920 patients receiving anti-PD-1/PD-L1 antibody (n=4751) or anti-CTLA-4 antibody (n=613) or undergoing chemotherapy (n=2556) from 14 randomized controlled trials submitted to the U.S. Food and Drug Administration were used to calculate the best overall response, objective response rate and progression-free survival (PFS) per iRECIST (iPFS) and Response Evaluation Criteria in Solid Tumours (RECIST). Associations between either PFS or iPFS and overall survival (OS) were evaluated using the method adopted by Obaet al.1

Results

Among 4751 anti-PD-1/PD-L1-antibody treated patients, 31.5% (95% CI 30.2% to 32.9%) and 30.5% (95% CI 29.2% to 31.8%) achieved an objective response per iRECIST or RECIST V.1.1, respectively. OS among the 48 patients with objective response by iRECIST only resembled that in patients with responses per RECIST V.1.1. The association between iPFS and OS was R2=0.277 and that between PFS and OS was R2=0.260.

Conclusions

Patients treated with anti-PD-1/PD-L1 antibodies with initial progressive disease per RECIST V.1.1 can experience prolonged stability or substantial reductions in tumor burden per iRECIST, atypical response patterns associated with prolonged OS. In the subgroup of patients with atypical responses, the application of iRECIST retrospectively in the evaluation of the objective response durations and the magnitude of PFS results in large differences compared with RECIST V.1.1. For the overall pooled population, the magnitude of these differences was modest, although a large proportion of patients had no further tumor assessments following RECIST V.1.1-defined progressive disease. Prospective studies employing iRECIST will be required to assess whether this response criteria more fully captures the benefit of immune checkpoint inhibitors.
Shadow of charged black holes in Gauss–Bonnet gravity
Authors: Das Anish , Saha Ashis , Gangopadhyay Sunandan
Published: February 2020

In this paper, we investigate the effect of higher curvature corrections from Gauss–Bonnet gravity on the shadow of charged black holes in bothAdSand Minkowski spacetimes. The null geodesic equations are computed in$$d=5$$d=5spacetime dimensions by using the directions of symmetries and Hamilton–Jacobi equation. With the null geodesics in hand, we then proceed to evaluate the celestial coordinates ($$\alpha , \beta $$α,β) and the radius$$R_s$$Rsof the black hole shadow and represent it graphically. The effects of chargeQof the black hole and the Gauss–Bonnet parameter$$\gamma $$γon the radius of the shadow$$R_s$$Rsis studied in detail. It is observed that the Gauss–Bonnet parameter$$\gamma $$γaffects the radius of the black hole shadow$$R_s$$Rsdifferently for theAdSblack hole spacetime in comparison to the black hole spacetime which is asymptotically flat. In particular the radius of the black hole shadow increases with increase in the Gauss–Bonnet parameter in case of theAdSblack hole spacetime and decreases in case of the asymptotically flat black hole spacetime. We then introduce a plasma background in order to observe the change in the silhouette of the black hole shadow due to a change in the refractive index of the plasma medium. Finally, we study the effect of the Gauss–Bonnet parameter$$\gamma $$γon the energy emission rate of the black hole which depends on the black hole shadow radius and represent the results graphically.
Feedback2Code: A Deep Learning Approach to Identifying User-Feedback-Related Source Code Files
Authors: Yan Shuhan , Du Tianjiao , Shen Beijun , Chen Yuting , Ren Zhilei
Published: February 2020

Users frequently raise feedback when using software products. Feedback from users regarding their experiences and expectations and software defects they found adds values to software maintenance and evolution — software managers collect user feedback and then dispatch feedback issues that developers (and/or maintainers) need to track and process. Feedback tracking is often supported by open source platforms and collaborative software systems. Meanwhile, there still exists a gap between feedback issues and source code: since user feedback is usually informal and arbitrary, engineers have to spend much effort on comprehending issues and identifying which source code files need to be improved or fixed.

This paper introduces a deep learning approach, Feedback2Code , which facilitates identification of user-feedback-related source code files. The core idea is to (1) explore latent semantics of user feedback and source code using several deep learning techniques such as Multi-Layer Perceptron (MLP), Convolutional Neutral Network (CNN) and skip-gram and (2) establish a multi-correlation model to explore linkages between feedback issues and source code files. Given a feedback issue, the linkages then allow engineers to identify source code files that are highly relevant to the issue.

We have implemented Feedback2Code and evaluated it against ChangeAdvisor (a state-of-the-art approach) on 24 open source projects. The evaluation results clearly show the strength of Feedback2Code : for 103793 feedback issues, Feedback2Code successfully established 101190 feedback-code linkages and achieved a precision that is [Formula: see text] higher than that of ChangeAdvisor . Feedback2Code also achieved an MRR and an MAP that are [Formula: see text] and [Formula: see text] higher than those of ChangeAdvisor , respectively. Furthermore, we also found that a Feedback2Code -trained model can be easily transferred, allowing feedback-code linkages to be established in new projects with a little history data.
Characterization of Durable Nanostructured Thin Film Catalysts Tested under Transient Conditions Using Analytical Aberration-Corrected Electron Microscopy
Authors: Cullen David A. , More Karren , Reeves K. Shawn , Vernstrom George D. , Atanasoska Ljiljana , Haugen Greg M. , Atanasoski Radoslav
Published: February 2020

Abstract not Available.
Nanostructured PtRu Catalyst for Oxidation of Ethylene Glycol and Glycerol in Alkaline Media
Authors: Falase Akinbayowa , Garcia Kristen , Atanassov Plamen
Published: February 2020

Abstract not Available.
Investigation of Titanium Supported Au-Ni and Pt-Ni Bimetallic Nanoparticles as Electrocatalysts for Direct Borohydride Fuel Cells
Authors: Tamašauskaitė-Tamašiu¯naitė Loreta , Balčiu¯naitė Aldona , Cekaviciu¯tė Rasa , Selskis Algirdas
Published: February 2020

Abstract not Available.
Oxygen Reduction Reaction Activity of Shape Controlled Pt Catalysts
Authors: Toge Akihide , Yokono Takashi , Saito Morihiro , Daimon Hideo , Tasaka Akimasa , Inaba Minoru
Published: February 2020

Abstract not Available.
PAN Based Carbon Nanofibers as an Active ORR Catalyst for DMFC
Authors: Nakagawa Nobuyoshi , Ali Abdelkareem Mohammad , Takino Daiki , Ishikawa Takayuki , Tsujiguchi Takuya
Published: February 2020

Abstract not Available.
Monolithic Photonic Integration on the Silicon Platform
Authors: Kimerling Lionel C.
Published: February 2020

Abstract not Available.
Influence of Flash Lamp Annealing on Electrical Characteristics of MOS Device with Si/La2O3/n-Si Structure
Authors: Kaneda Tasuku , Kouda Miyuki , Kakushima Kuniyuki , Ahmet Parhat , Tsutsui Kazuo , Nishiyama Akira , Sugii Nobuyuki , Natori Kenji , Hattori Takeo , Iwai Hiroshi
Published: February 2020

Abstract not Available.
Atomically Controlled Plasma Processing for Quantum Heterointegration of Group IV Semiconductors
Authors: Sakuraba Masao , Murota Junichi
Published: February 2020

Abstract not Available.
Impact of Defects on Semiconductor Devices Made from GaN/Si and SiC Epitaxial Wafers
Authors: Loboda Mark
Published: February 2020

Abstract not Available.
High Power Nitride Field Effect Transistor
Authors: Shur Michael , Simin Grigory , Gaska Remis
Published: February 2020

Abstract not Available.
Characteristics of 4H-SiC MOSFETs Using Low-Temperature Oxide
Authors: Wu Tian-Li , Cheng Chun-Hu , Huang Chih-Fang
Published: February 2020

Abstract not Available.
Implications for Robust Reliability Testing of Power SiC MOSFETs
Authors: Green Ronald , Lelis Aivars , Habersat Daniel
Published: February 2020

Abstract not Available.
Electric-field and Thermally-activated Failure Mechanisms of AlGaN/GaN High Electron Mobility Transistors
Authors: Zanoni Enrico , Meneghesso Gaudenzio , Meneghini Matteo , Stocco Antonio , Rampazzo Fabiana , Silvestri Riccardo , Rossetto Isabella , Ronchi Nicolò
Published: February 2020

Abstract not Available.
Toward the Reduction of Performance-Limiting Defects in SiC Epitaxial Substrates
Authors: Ohtani Noboru
Published: February 2020

Abstract not Available.
Integrated Microinductors on Semiconductor Substrates for Power Supply on Chip
Authors: Rohan J. F. , Casey Declan , O'Brien Joe , Hegarty Margaret , Kelleher Anne-Marie , Wang Ningning , Jamieson Brice , Waldron Finbarr , Kulkarni Santosh , Roy Saibal , O'Mathuna S. Cian
Published: February 2020

Abstract not Available.
Origins and Evolution of Stress in Electrodeposited Films
Authors: Chason Eric
Published: February 2020

Abstract not Available.
Superconformal Film Growth: Challenges and Opportunites
Authors: Moffat Thomas , Ou Yang Liang -Yueh , Liu Yihua , Lee C-H , Josell Daniel
Published: February 2020

Abstract not Available.
Two-Dimensional Metallo-Semiconductor Networks for Electronic and Photonic Applications
Authors: Tiginyanu Ion , Monaico Eduard , Ursaki Veaceslav
Published: February 2020

Abstract not Available.
Next-Generation Methods for Integration of Experiments, Theory and Modeling for Electrochemical Phase Formation
Authors: Alkire Richard C.
Published: February 2020

Abstract not Available.
Nucleation of Metals Electrodeposited on Substrates Treated with OH•
Authors: Rapecki Tomasz , Donten Mikolaj , Nowicka Anna , Stojek Zbigniew J.
Published: February 2020

Abstract not Available.
Electrochemical Co-Deposition of Au-Ni Alloys
Authors: Liang Defu , Zangari G.
Published: February 2020

Abstract not Available.
Thin Silicon Film Deposition by Unilateral Electroreduction at the Surface of Nanosilicon Ballistic Electron Emitter
Authors: Ohta Toshiyuki , Yoshimura Hideo , Gelloz Bernard , Koshida Nobuyoshi
Published: February 2020

Abstract not Available.
Nucleation and Growth of Copper on Ru-Based Substrates: I. The Effect of the Inorganic Components
Authors: Nagar Magi , Vereecken P. M. , Strubbe Katrien , Radisic Aleksandar
Published: February 2020

Abstract not Available.
Ag2O-Sensitized GaOOH Nanorods Exhibiting Charge Carrier Separation under Visible Light Illumination
Authors: Hsu Yi-Han , Hsu Yung-Jung
Published: February 2020

Abstract not Available.
Transferring Porous Silicon Layer onto a Desirable Substrate
Authors: Chen K. -J. , Hsu J. -Y. , Song B. R. , Lee W. T. , Lin Y. -B. , Zhou X. -L. , Hsu C. -S. , Huang C. -H , Ho C. -C. , Lee Tien-Hsi
Published: February 2020

Abstract not Available.
Investigation of Ni-Al-Layered Double Hydroxide as Alternative Cathode Material for Rechargeable Nickel Hydride Batteries
Authors: Mondal Debajyoti , Villemure Gilles
Published: February 2020

Abstract not Available.
Analytical Approaches to an Electrochemical System Including Forced Convection
Authors: Kim Sun Ung , Monroe Charles W.
Published: February 2020

Abstract not Available.
New Insight into the Discharge Mechanism of Lithium/Sulfur Cells
Authors: Barchasz Céline , Molton Florian , Duboc Carole , Lepretre Jean-Claude , Alloin Fannie , Patoux Sebastien
Published: February 2020

Abstract not Available.
Charge Transport and Discharge Mechanism in [PVA+PVP+Mg(NO3)2] Polymer Electrolyte Films
Authors: Polu Anji R. , Kumar Ranveer
Published: February 2020

Abstract not Available.
Nanocrystalline-Amorphous Silicon Composite Anode by Chemical Reduction of Silicon Salts
Authors: Epur Rigved , Kuruba Ramalinga , Manivannan Ayyakkannu , Kumta Prashant N.
Published: February 2020

Abstract not Available.
Increasing the Scale of Lithium-Ion Batteries and the Importance of Inherent Cell Safety
Authors: Orendorff Christopher
Published: February 2020

Abstract not Available.
Prevention of Thermal Runaway in a Li-Ion Battery Pack for Electric Vehicle
Authors: Stro̸m Per Olaf , Srivastava Akhilesh K. , Valo̸en Lars Ole
Published: February 2020

Abstract not Available.
Failure Investigation of Li-Ion Batteries under Different Operating Conditions
Authors: Xu Fan , He Hao , Ren Yang , Xie Jian
Published: February 2020

Abstract not Available.
A Compact Laboratory Safety Chamber for Confinement of Li-Ion Elements during Forming and Testing
Authors: Lupotto Paolo , Hognon Jean-Luc
Published: February 2020

Abstract not Available.
A High Performance Lithium-Air Battery
Authors: Hassoun Jusef , Jung Hun-Gi , Sun Yang-Kook , Scrosati Bruno
Published: February 2020

Abstract not Available.
Pitch Carbon-Coated Lithium Sulfide Electrode for Advanced, Lithium-Metal Free-Sulfur Batteries
Authors: Park Juwon , Kim Junghoon , Hassoun Jusef , Sun Yang-Kook , Scrosati Bruno
Published: February 2020

Abstract not Available.
Electricity Generation in Microbial Fuel Cell by the Decomposition of Organic Slurry by E-Coli
Authors: Songera Durgesh S. , Kabra Akshay , Choudhary Ashish
Published: February 2020

Abstract not Available.
Cathodic Grafting of Alkyl Chains onto Glassy Carbon Easy Immobilization of Ferrocene Used as Redox Probe
Authors: Jouikov Viatcheslav , Simonet Jacques
Published: February 2020

Abstract not Available.
Electrochemical Investigation of Ketone Complexation by Lewis Acids in a Chloroaluminate Ionic Liquid
Authors: Cheek Graham T.
Published: February 2020

Abstract not Available.
Octaorgano Silsesquioxanes with Encapsulated Fluoride Anion, TBA(F@T8
-), as a New Class of Non-Coordinating Non-Nucleophilic Supporting Electrolytes
Authors: Syroeshkin Mikhail , Wang Yu , Gul'tyai Vadim , Jouikov Viatcheslav
Published: February 2020

Abstract not Available.
Graphene Bilayers: Electron Transport and Device Applications
Authors: Tutuc Emanuel
Published: February 2020

Abstract not Available.
In Situ Electrical Studies of Ozone Based Atomic Layer Deposition on Graphene
Authors: Kim Jiyoung , Jandhyala Srikar , Mordi Greg , Lee Bongki
Published: February 2020

Abstract not Available.
Modeling the Growth of SWNTs and Graphene on the Atomic Scale
Authors: Neyts Erik C. , Van Duin Adri C. , Bogaerts Annemie
Published: February 2020

Abstract not Available.
III-Sb MOSFETS : Opportunities and Challenges
Authors: Nainani Aneesh , Yuan Ze , Kumar Archana , Boos Brad , Bennett Brian , Saraswat Krishna
Published: February 2020

Abstract not Available.
Investigation of Thermal Stress Relief Mechanism and Corresponding Hole Mobility Improvement in Epitaxially Grown, Wafer-Scale Ge on Si, Using Air-Gapped SiO2 Nanotemplates
Authors: Ghosh Swapnadip , Leonhardt Darin , Han Sang M.
Published: February 2020

Abstract not Available.
Trimethylaluminum Passivation of Al2O3/InGaAs Interface for Metal-Oxide-Semiconductor Devices
Authors: Ahn Jaesoo , McIntyre Paul C.
Published: February 2020

Abstract not Available.
Non-Destructive, Large-Scale Imaging of Anti-Phase Disorder in GaP Epilayers on Si(001) Using Low-Energy Electron Microscopy
Authors: Borkenhagen Benjamin , Lilienkamp Gerhard , Daum Winfried , Döscher Henning , Hannappel Thomas
Published: February 2020

Abstract not Available.
Recent Advances in Integrated Optoelectronics and their Applications in Endomicroscopy and Distributed Environment Sensing
Authors: Fang Qiyin , Deen M. J.
Published: February 2020

Abstract not Available.
MEMS Based Mechanical Resonant Push-Pull Scanning Endoscope
Authors: Gu Kebin , Tsui Chi Leung , Wang Wei-Chih
Published: February 2020

Abstract not Available.
Characterization of a 130 nm CMOS SPAD Pixel
Authors: Palubiak Darek , Deen M. J. , Peng Hao
Published: February 2020

Abstract not Available.
CMOS Sensors for Compressive Sensing
Authors: Dadkhah Mohammadreza R. , Deen M. J. , Shirani Shahram
Published: February 2020

Abstract not Available.
Integration Technologies Applied to InP-Based Geiger-Mode APDs
Authors: Itzler Mark A.
Published: February 2020

Abstract not Available.
InGaAs/InP Single Photon Avalanche Diodes
Authors: Lu Zhiwen , Zheng Xiaoguang , Sun Wenlu , Campbell Joe , Jiang Xudong , Itzler Mark A.
Published: February 2020

Abstract not Available.
Single-Photon, Deep Sub-Nanosecond Integrated Circuits for Fluorescence Lifetime Imaging Microscopy
Authors: Maruyama Yuki , Charbon Edoardo
Published: February 2020

Abstract not Available.
Design and Implementation of a Long Wavelength Near InfraRed Spectrometer Based on MEMS Scanning Mirror
Authors: Ye Kuntao , Li Yuxiao , Dong Taiyuan , He Wenxi , Li Sheng , Wei Wanghe , Xiao Xian
Published: February 2020

Abstract not Available.
Highly Stable Ultrathin Ag-Ni Films for Flexible Transparent Electronics
Authors: Formica Nadia , Ghosh Dhriti S. , Chen Tong Lai , Pruneri Valerio
Published: February 2020

Abstract not Available.
Nonlinear Light Propagation in Photopolymers: From Self-Trapped Beams to 3-D Optical Lattices
Authors: Saravanamuttu Kalaichelvi
Published: February 2020

Abstract not Available.
(Invited) Universal Ion Implantation System for Use in the Preparation of Doped Silicon Dielectric Films
Authors: Knights Andy P. , Savidge Rachel M. , Stevanovic Doris V. , Kleiman Rafael N. , Chivers David
Published: February 2020

Abstract not Available.
(Invited) Photon Management with Si Nanocrystals
Authors: Gregorkiewicz Tom
Published: February 2020

Abstract not Available.
(Invited) Growing Si Nanocrystals within a-Si Nanoclusters Embedded in a-SiO2: Evolution of Photoluminescence
Authors: Borrero-González L.J. , Nunez L.A.O. , Guimarães F.E.G. , Wojcik J. , Mascher P. , Gennaro A.M. , Tirado M. , Comedi D.
Published: February 2020

Abstract not Available.
Emissive Semiconductor Nanocrystals: Recent Progress
Authors: Eychmüller Alexander , Panda Subhendu K. , Hickey Stephen G. , Miao Shiding , Lesnyak Vladimir , Gaponik Nikolai
Published: February 2020

Abstract not Available.
Photovoltaic Behavior in a Symmetrical CdSe Quantum Dot - ITO Cell
Authors: Giles Alexander J. , Stokes E. B.
Published: February 2020

Abstract not Available.
Formation of Photo-Luminescent Patterns on Paper Using Nanocrystalline Quantum Dot Ink and Mist Deposition
Authors: Kshirsagar Aditya , Pickering Shawn , Xu Jian , Ruzyllo Jerzy
Published: February 2020

Abstract not Available.
Catalytic Etching of Silicon - Influence of Etchant Concentration and Catalyst Geometry
Authors: Lianto Prayudi , Thompson Carl V. , Choi Wee Kiong
Published: February 2020

Abstract not Available.
Spectroscopic Studies of Cr(VI) Adsorption onto Nano-Magnetite and Nano-Maghemite
Authors: Liu Dian Y. , Chen Yen-Hua
Published: February 2020

Abstract not Available.
Synthesis and Characterization of Silicon Doped LiFe0.4Mn0.6PO4 Cathode Materials of Li-Ion Battery
Authors: Seo Gayeong , Lee Youngil
Published: February 2020

Abstract not Available.
Cr-doped Pyrochlore Y2(Ti1-xCrx)2O7 as Electrode Materials for IT-SOFC
Authors: Hung Hau-En , Lee Chi-Shen
Published: February 2020

Abstract not Available.
Electrochemical Flow Cell Setup for In Situ Surface X-ray Diffraction
Authors: Carla' Francesco , Balmes Olivier , Drnec Jakub , Felici Roberto
Published: February 2020

Abstract not Available.
Biofuel Cell Based on Carbon Nanotubes with Covalently Bound Laccase and Perfluorinated Compounds
Authors: Karaskiewicz Maciej R. , Nazaruk Ewa , Rogalski Jerzy , Biernat Jan , Zelechowska Kamila , Bilweicz Renata
Published: February 2020

Abstract not Available.
High Electrochemical Performances of Pr1-xSrxCoO3-δ (x=0.1, 0.3, 0.5, and 0.7) as a Cathode for Solid Oxide Fuel Cell Applications
Authors: Park Seonhye , Shin Jeeyoung , Kim Guntae
Published: February 2020

Abstract not Available.
Microbial Corrosion of Steel
Authors: Bala Dharshini D. , Chidambaram Dev
Published: February 2020

Abstract not Available.
Synthesis of Mesoporous Carbon Nanomaterials for Lithium-Ion Batteries
Authors: Kim Si-Jin , Han Sang-Beom , Lee Young-Woo , Zhoh Choon-Koo , Park Kyung-Won
Published: February 2020

Abstract not Available.
(Invited) Analytical Ultracentrifugation Characterization of Empty and Water-Filled Single-Wall Carbon Nanotubes
Authors: Fagan Jeffrey A. , Rastogi Vinayak , Blackburn Jeffrey L. , Hight Walker Angela R.
Published: February 2020

Abstract not Available.
(Invited) Intrinsic Resistivity of Individual Single Walled Carbon Nanotubes with Known-Chirality
Authors: Takekoshi Mitsuhide , Kim Philip
Published: February 2020

Abstract not Available.
Fabrication of Carbon Nanotube Thin Film on Highly Rough Glass Substrate as Field Emission Devices
Authors: Chien Yun-Shan , Tsai Wan-Lin , Lee I-Che , Yuan Chang-Chin , Sung Chang-Ming , Cheng Kung-Lung , Cheng Kung-Lung
Published: February 2020

Abstract not Available.
Planting of Carbon Nanotubes on Nano-Textured and Micro-Structured Silicon Substrates
Authors: Taak Serveh , Darbari Sara , Poudineh Mahla , Sanaee Zeinab , Mohajerzadeh Shams
Published: February 2020

Abstract not Available.
Tailoring the Microstructure Characteristics of Cu-MWCNT Metal Matrix Composites Through Modified Deposition Parameters
Authors: Manu R. , Jayakrishnan Sobha
Published: February 2020

Abstract not Available.
Chemical and Structural Influences on the Electrochemical Reactivity of Uranium Dioxide Nuclear Fuel
Authors: He Heming , O'Neil Kevin , Noel James J. , Semenikhin Oleg , Shoesmith David
Published: February 2020

Abstract not Available.
Modeling Non Equilibrium Potentiometry and Electrochemical Impedance by NPP Model
Authors: Lewenstam Andrzej , Sokalski Tomoasz , Jasielec Jerzy , Lingenfelter Peter , Grysakowski Bartosz , Wierzba Bartlomiej , Filipek Robert , Danielewski Marek
Published: February 2020

Abstract not Available.
The Role of OH Radicals in Oxidation Reactions at BDD
Authors: Ernst S. , Ayata S. , Stefanova A. , Baltruschat Helmut
Published: February 2020

Abstract not Available.
Surface Analysis and Surface Pretreatments for Elimination of Native Cu Oxide Layer
Authors: Lee Youn Seoung , Nho Sang-Soo , Choi Eun-Hey , Rha Sa-Kyun
Published: February 2020

Abstract not Available.
The Effects of Ce in BiFeO3 Ferroelectric Films
Authors: Hsiao Hsiao-Feng , Lin Tsung-Ju , Leu Ching-Chich , Hu Chen-Ti
Published: February 2020

Abstract not Available.
Rapid Screening of Dopants for TiO2 Photocatalysts by Scanning Electrochemical Microscopy
Authors: Weng Yu-Ching , Cheng Si-Jhih , Chou Yu-De
Published: February 2020

Abstract not Available.