LLukas22/scidocs huggingface dataset:
A prediction method for breakdown voltage of typical air gaps based on electric field features and support vector machine

Breakdown voltage of the air gap is of vital importance for the design of the external insulation in high-voltage transmission and transformation projects. In this paper, a new prediction method for the breakdown voltages of typical air gaps based on the electric field features and support vector machine (SVM) was proposed. According to the finite element calculation results of static electric field distribution, the electric field values in the whole region, discharge channel, surface of the electrode and the shortest path were extracted and post-processed, which constituted the electric field features characterizing the gap structure. Then, the breakdown voltage prediction model of the air gap was established by using electric field features as the input parameters to SVM, and whether the gap breakdown would happen as the output parameters of SVM, which changing the regression problem to a binary classification problem. This model was applied to predict the power frequency breakdown voltages of different short air gaps including sphere-sphere gaps, rod-plane gaps, sphere-plane gaps and sphereplane- sphere gaps. The power frequency breakdown voltages of longer air gaps which are affected by corona, and the 50% positive switching impulse breakdown voltages of long sphere-plane gaps and rod-plane gaps were predicted as well. The predicted results agree well with experimental values and simulated results of the published models, which validate the effectiveness of the proposed model. This method supplies a new possible way to obtain the breakdown voltage of air gaps.
Production of human platelet lysate by use of ultrasound for ex vivo expansion of human bone marrow-derived mesenchymal stromal cells.

BACKGROUND AIMS
A medium supplemented with fetal bovine serum (FBS) is of common use for the expansion of human mesenchymal stromal cells (MSCs). However, its use is discouraged by regulatory authorities because of the risk of zoonoses and immune reactions. Human platelet lysate (PL) obtained by freezing/thawing disruption of platelets has been proposed as a possible substitute of FBS. The process is time-consuming and not well standardized. A new method for obtaining PL that is based on the use of ultrasound is proposed.


METHODS
Platelet sonication was performed by submerging platelet-containing plastic bags in an ultrasonic bath. To evaluate platelet lysis we measured platelet-derived growth factor-AB release. PL efficiency was tested by expanding bone marrow (BM)-MSCs, measuring population doubling time, differentiation capacity and immunogenic properties. Safety was evaluated by karyotyping expanded cells.


RESULTS
After 30 minutes of sonication, 74% of platelet derived growth factor-AB was released. PL enhanced BM-MSC proliferation rate compared with FBS. The mean cumulative population doubling (cPD) of cells growth in PL at 10%, 7.5% and 5% was better compared with cPD obtained with 10% FBS. PD time (hours) of MSCs with PL obtained by sonication was shorter than for cPD with PL obtained by freezing/thawing (18.9 versus 17.4, P < 0.01). BM mononucleated cells expressed MSC markers and were able to differentiate into adipogenic, osteogenic and chondrogenic lineages. When BM-MSCs and T cells were co-cultured in close contact, immunosuppressive activity of BM-MSCs was maintained. Cell karyotype showed no genetic alterations.


CONCLUSIONS
The proposed method for the production of PL by sonication could be a safe, efficient and fast substitute of FBS, without the potential risks of FBS.
CHARACTERIZATION OF INTERFERENCE EFFECTS ON GPS SIGNAL CARRIER PHASE ERROR

Australia now has a number of continuously operating reference station (CORS) networks for real-time kinematic (RTK) GPS. Each station in the network, however, is vulnerable to radio frequency (RF) interference, which can degrade the accuracy of corrections provided to network users. Despite the importance of the effects of interference on GPS signal carrier phase error and pseudorange, the problem has not been solved despite significant research efforts. In this paper firstly analytical techniques are used to show the relationship between the interference frequency and the quality of the received signal, as estimated by the receiver. Then the relationship between this estimate and the carrier loop phase error is investigated and found to be effective in assessing the effects of narrowband interference on the carrier phase error. Next the theoretical predictions are compared with the experimental results. BIOGRAPHY OF ASGHAR TABATABAEI BALAEI Asghar Tabatabaei Balaei was born in Tehran, Iran, on March 26, 1975. He received the B.S., and M.S., degrees in electrical engineering from Sharif University of Technology, Tehran, Iran, in 1998, and 2000, respectively. Currently, He is doing his PhD at School of Surveying and Spatial Information, University of New South Wales, Sydney, Australia. His current research activities are focused on the characterization and detection of sources of interference and multipath in GPS (Global Positioning System).The project is supported by the Cooperative Research Centre in Spatial Information. Stochastic Signal Processing, Estimation Theory, and Global positioning system are his favorite research topics.
An Improved Neural Network Training Algorithm for Wi-Fi Fingerprinting Positioning

Ubiquitous positioning provides continuous positional information in both indoor and outdoor environments for a wide spectrum of location based service (LBS) applications. With the rapid development of the low-cost and high speed data communication, Wi-Fi networks in many metropolitan cities, strength of signals propagated from the Wi-Fi access points (APs) namely received signal strength (RSS) have been cleverly adopted for indoor positioning. In this paper, a Wi-Fi positioning algorithm based on neural network modeling of Wi-Fi signal patterns is proposed. This algorithm is based on the correlation between the initial parameter setting for neural network training and output of the mean square error to obtain better modeling of the nonlinear highly complex Wi-Fi signal power propagation surface. The test results show that this neural network based data processing algorithm can significantly improve the neural network training surface to achieve the highest possible accuracy of the Wi-Fi fingerprinting positioning method.
Data envelopment analysis : Prior to choosing a model

In this paper, we address several issues related to the use of data envelopment analysis (DEA). These issues include model orientation, input and output selection/definition, the use of mixed and raw data, and the number of inputs and outputs to use versus the number of decision making units (DMUs). We believe that within the DEA community, researchers, practitioners, and reviewers may have concerns and, in many cases, incorrect views about these issues. Some of the concerns stem fromwhat is perceived as being the purpose of the DEA exercise. While the DEA frontier can rightly be viewed as a production frontier, it must be remembered that ultimately DEA is a method for performance evaluation and benchmarking against best-practice. DEA can be viewed as a tool for multiple-criteria evaluation problems where DMUs are alternatives and each DMU is represented by its performance in multiple criteria which are coined/classified as DEA inputs and outputs. The purpose of this paper is to offer some clarification and direction on these matters. & 2013 Elsevier Ltd. All rights reserved.
Development and validation of the functional assessment of cancer therapy nasopharyngeal cancer subscale.

BACKGROUND
We aimed to develop a quality-of-life subscale for nasopharyngeal carcinoma (NPC) and validate the functional assessment of cancer therapy-nasopharyngeal (FACT-NP).


METHODS
The FACT-NP was tested cross-sectionally in survivors of postirradiated NPC (n = 357) and was administered to newly diagnosed patients (n = 160) before, at the end of, and 3 months after radiotherapy (RT).


RESULTS
Each FACT-NP domain was internally consistent (Cronbach's alpha = 0.87-0.90). The test-retest reliability for each subscale was satisfactory (intraclass correlation coefficient = .73-.88). Concurrent validity was suggested by the moderate to strong correlations between the FACT-NP and the Quality of Life-Radiation Therapy Instrument-Head and Neck (QOL-RTI-H&N) subscales (Pearson r = .39-.84). The FACT-NP was responsive to clinical changes from pretreatment to 3 months after RT (effect sizes > 0.6 for clinically relevant subscales). The pooled data for multitrait scaling analysis showed satisfactory item internal consistency and item discriminant validity (100% and 90% scaling success, respectively).


CONCLUSION
The FACT-NP is a reliable and valid instrument for measuring QOL in patients with NPC.
Computer-based plagiarism detection methods and tools: an overview

The paper is dedicated to plagiarism problem. The ways how to reduce plagiarism: both: plagiarism prevention and plagiarism detection are discussed. Widely used plagiarism detection methods are described. The most known plagiarism detection tools are analysed.
Bridging Grammarware and Modelware

In Software Engineering many text-based languages and supporting tools are used, forming the grammarware technical space. Currently model driven engineering is the new emerging paradigm for software engineering, which uses modelling languages and tools, forming the modelware technical space. Transition to the new technical space and interoperability between these two technical spaces is needed in many development scenarios. Building a bridge between these two technical spaces is a tedious task, that has to be repeated for each language to be transformed. Therefore, we propose a generic bridge between grammarware and modelware technical spaces, that can generate a specific bridge based on the EBNF of a given language semi-automatically. The generation comprises of two steps, (1) automatic generation of metamodel corresponding to the EBNF and (2) annotations to provide the additional semantics not captured by the EBNF. The generated bridge is capable of bi-directional transformations between sentences (programs) and corresponding models and can be used in re-engineering applications and for integration of text-based and model-based tools. The benefits of this approach are rapid development and correctness.
Differentially Private Policy Evaluation

We present the first differentially private algorithms for reinforcement learning, which apply to the task of evaluating a fixed policy. We establish two approaches for achieving differential privacy, provide a theoretical analysis of the privacy and utility of the two algorithms, and show promising results on simple empirical examples.
Swimming the New Stream: The Disjunctions Between and Within Popular and Academic International Law

In the postwar era, legal scholars moved to a pragmatist approach in international legal thought.' Pragmatism refers to "a modem consequential philosophy that emphasized institutional process, functional progress, or rule-centered doctrinal specificity, while denying the relevance of coherent abstraction."2 This approach attempted to cultivate a just world order based on the rule of law, forcing nations to adhere to legal principles at the expense of raw aggression.' Its goal was to use doctrinal analysis as the ultimate technique in analyzing issues of institutional process and order in the international arena.' Unfortunately, pragmatism never set forth a central theory of social behavior, but simply hovered between the older naturalist and positivist' schools of thought. Pragmatism focused only on descriptions of varying institutional forms and practices at the expense of theorizing about the nature of law and social behavior.6 Without reference to a core theory to explain the nature of social interaction in the international context, the pragmatist approach foundered on doctrinal shores. Thus the resultant research that it yielded produced a fragmented body of highly specific lists and observations about international law lacking a cohesive evaluation of
Steal my idea! Organizational adoption of user innovations from a user innovation community: A case study of Dell IdeaStorm

⁎ Corresponding author. Tel.: +1 850 644 4417. E-mail addresses: pdigangi@fsu.edu (P.M. Di Gangi), (M. Wasko). 1 Tel.: +1 850 644 0916. 2 Throughout this manuscript, we interchangeably r When examining a user innovation community, in conceptual ideas proposed by end users that, if adopte action to produce the physical innovation or service. Ou idea is based on its need for maintaining clarity in spe Specifically, innovation is used when discussing the theo adoption while idea is used in the operationalized stud
Pharmacokinetics of ranibizumab after intravitreal administration in patients with retinal vein occlusion or diabetic macular edema.

OBJECTIVE
To describe the systemic pharmacokinetics of ranibizumab after intravitreal administration in patients with retinal vein occlusion (RVO) or diabetic macular edema (DME).


DESIGN
A population approach of nonlinear mixed-effect pharmacokinetics modeling based on serum concentrations of ranibizumab measured at various times after intravitreal administration.


PARTICIPANTS
Patients with RVO (n = 441) and DME (n = 435) from 4 large, randomized, phase 3 clinical trials of monthly ranibizumab intravitreal administration.


METHODS
A 1-compartment pharmacokinetics model with first-order absorption and elimination rate constants previously developed in patients with age-related macular degeneration (AMD) was fitted separately to RVO and DME data. Population pharmacokinetic parameters and interindividual variability were estimated for each model. Baseline covariates were evaluated for potential effects on systemic pharmacokinetics. Model performance was validated using general diagnostic plots and a visual predictive check.


MAIN OUTCOME MEASURES
Ranibizumab disposition was determined in RVO and DME patients and compared with that previously seen in AMD patients.


RESULTS
The AMD pharmacokinetics model correctly predicted the measured serum ranibizumab concentration data for RVO and DME patients. Most observed data points were within the simulated 90% confidence interval, indicating that systemic ranibizumab concentrations were comparable among AMD, RVO, and DME patients. No disease-related covariates were identified by the population pharmacokinetics analysis.


CONCLUSIONS
The systemic pharmacokinetics of ranibizumab were similar among patients with AMD, RVO, or DME. Disease-related differences and patient demographics, measured in this study, did not lead to variability in ocular elimination or in systemic exposure of ranibizumab after intravitreal administration. In all disease processes tested, ranibizumab exits the eye slowly and then is eliminated rapidly from the circulation, thus minimizing systemic exposure.
Passive Radio-Frequency Repeater for Enhancing Signal Reception and Transmission in a Wireless Charging Platform

This paper reports new results of an emerging field that combines radio-frequency (RF) repeater design and wireless power technologies for charging applications. Power electronics-based wireless charging pads have recently been developed for charging portable electronic devices such as mobile phones. However, the electromagnetic shield underneath the pad could reduce transmission and reception signals. In this paper, a novel passive RF repeater for a wireless charging platform is proposed and investigated for mitigating the signal blocking problem. Since the effective shielding structure for the low-frequency charging signal is not RF friendly, the received RF signal of a wireless mobile device can be reduced when the phone is placed on a wireless charging platform. A dual-polarization free-positioning passive RF signal repeater has been successfully designed and implemented. It can improve the RF reception signal strength by at least 3.6 dB without noticeable reduction in energy efficiency in the charging process.
[Clinical audit of patients admitted to hospital in Spain due to exacerbation of COPD (AUDIPOC study): method and organisation].

BACKGROUND
There is little information regarding the clinical management of hospital inpatients diagnosed with exacerbation of Chronic Obstructive Pulmonary Disease (COPD). AUDIPOC is a clinical audit dealing with the clinical management of COPD in Spain.


OBJECTIVES
To examine the adequacy and validity of the instruments used to measure the variables proposed by AUDIPOC Spain (Preliminary Study) and to verify the viability of AUDIPOC in a complex environment with hospitals of different sizes, resources, and organizational layout (Pilot Study).


MATERIALS AND METHODS
The Preliminary Study took place in 4 hospitals and studied 213 cases. The Pilot Study took place in 30 hospitals of 6 Autonomous Communities (i.e. Regions) and studied 1203 cases.


RESULTS
The results of both studies contributed to the improvement of the design, methods and organization of the AUDIPOC work. Some of the improvements include better training of those responsible at a hospital level, a new classification of hospitals, the incorporation of new variables and the creation of a Bureau for the Coordination and Management of the Project.


CONCLUSIONS
The AUDIPOC study is viable. It aims to recruit 10000 patients across 142 hospitals from all the Regions of Spain.
Clinical factors associated with the humoral immune response to influenza vaccination in chronic obstructive pulmonary disease

BACKGROUND AND OBJECTIVE
Individuals with chronic obstructive pulmonary disease (COPD) are at a high risk of developing significant complications from infection with the influenza virus. It is therefore vital to ensure that prophylaxis with the influenza vaccine is effective in COPD. The aim of this study was to assess the immunogenicity of the 2010 trivalent influenza vaccine in persons with COPD compared to healthy subjects without lung disease, and to examine clinical factors associated with the serological response to the vaccine.


METHODS
In this observational study, 34 subjects (20 COPD, 14 healthy) received the 2010 influenza vaccine. Antibody titers at baseline and 28 days post-vaccination were measured using the hemagglutination inhibition assay (HAI) assay. Primary endpoints included seroconversion (≥4-fold increase in antibody titers from baseline) and the fold increase in antibody titer after vaccination.


RESULTS
Persons with COPD mounted a significantly lower humoral immune response to the influenza vaccine compared to healthy participants. Seroconversion occurred in 90% of healthy participants, but only in 43% of COPD patients (P=0.036). Increasing age and previous influenza vaccination were associated with lower antibody responses. Antibody titers did not vary significantly with cigarette smoking, presence of other comorbid diseases, or COPD severity.


CONCLUSION
The humoral immune response to the 2010 influenza vaccine was lower in persons with COPD compared to non-COPD controls. The antibody response also declined with increasing age and in those with a history of prior vaccination.
Polymer supported metal complexes as catalysts for oxidation of thiosalts by molecular oxygen: I. Poly(4-vinyl pyridine)—Cu(II) complex

Abstract A copper(II) complex of lightly cross-linked poly(4-vinyl pyridine) has been prepared and used as a catalyst for oxidation of thiosalts by molecular oxygen at ambient temperatures. This polymeric complex has been found to catalyse oxidation of thiosulphate, trithionate and tetrathionate to sulphate. A detailed study of the kinetics of oxidation of thiosulphate by molecular oxygen in the presence of this catalyst revealed that at 96.7 kPa total pressure and 30°C, resistance to the reaction using 106 – 149 μm-size particles is approximately equally divided between extraparticle mass transfer and the chemical activity of the complex. The mechanism of oxidation of thiosulphate has been suggested based on product distribution and kinetics. The rate of oxidation is not significantly affected by the activity of the reaction medium down to a pH of 2.0, but falls markedly as pH is reduced further.
Hitachi--pioneering a "factory" strategy and structure for large-scale software development

INTRODUCTION This paper is part of a larger study examining the question of whether or not companies are choosing to manage a complex engineering activity such as large-scale software development with a range of strategic considerations and organizational as well as technological approaches that corresponds to the spectrum usually associated with "hard" manufacturing, i.e. job shops, batch organizations, and factories exhibiting various degrees of flexibility in product mixes and technologies. The research project includes the proposal of technology and policy criteria defining what a factory environment for software might look like; a survey of 38 software facilities in the U.S. and Japan to determine where firms stand in relation to these criteria; and detailed case studies examining the technology and policy implementation process followed at firms identified as being close to the factory model. ' There are several interrelated conclusions: (1) This spectrum, including "factory" approaches, is clearly observable in the sample of software facilities in the U.S. and Japan. (2) There appears to be nothing inherent in software as a technology that prevents some firms from creating strategies and organizational structures to manage product and process development more effectively, even with a relatively new and complex technology such as software. (3) The basic technological infrastructures to aid software process management are not significantly different between Japanese and U.S. firms.
VQABQ: Visual Question Answering by Basic Questions

Taking an image and question as the input of our method, it can output the text-based answer of the query question about the given image, so called Visual Question Answering (VQA). There are two main modules in our algorithm. Given a natural language question about an image, the first module takes the question as input and then outputs the basic questions of the main given question. The second module takes the main question, image and these basic questions as input and then outputs the text-based answer of the main question. We formulate the basic questions generation problem as a LASSO optimization problem, and also propose a criterion about how to exploit these basic questions to help answer main question. Our method is evaluated on the challenging VQA dataset [1] and yields state-of-the-art accuracy, 60.34% in open-ended task.
Copyright compliance and infringement in ResearchGate full-text journal articles

ResearchGate is increasingly used by scholars to upload the full-text of their articles and make them freely available for everyone. This study aims to investigate the extent to which ResearchGate members as authors of journal articles comply with publishers’ copyright policies when they self-archive full-text of their articles on ResearchGate. A random sample of 500 English journal articles available as full-text on ResearchGate were investigated. 108 articles (21.6%) were open access (OA) published in OA journals or hybrid journals. Of the remaining 392 articles, 61 (15.6%) were preprint, 24 (6.1%) were post-print and 307 (78.3%) were published (publisher) PDF. The key finding was that 201 (51.3%) out of 392 non-OA articles infringed the copyright and were non-compliant with publishers’ policy. While 88.3% of journals allowed some form of self-archiving (SHERPA/RoMEO green, blue or yellow journals), the majority of non-compliant cases (97.5%) occurred when authors self-archived publishers’ PDF files (final published version). This indicates that authors infringe copyright most of the time not because they are not allowed to self-archive, but because they use the wrong version, which might imply their lack of understanding of copyright policies and/or complexity and diversity of policies.