LLukas22/scidocs huggingface dataset:
A taxonomy for attack graph generation and usage in network security

Attack graphs model possible paths that a potential attacker can use to intrude into a target network. They can be used in determining both proactive and reactive security measures. Attack graph generation is a process that includes vulnerability information processing, collecting network topology and application information, determining reachability conditions among network hosts, and applying the core graph building algorithm. This article introduces a classification scheme for a systematical study of the methods applied in each phase of the attack graph generation process, including the usage of attack graphs for network security. The related works in the literature are stated based on the proposed classification scheme and contributive ideas about potential challenges and open issues for attack graph generation and usage are provided. © 2016 Elsevier Ltd. All rights reserved.
Cooperative wireless sensor environments supporting body area networks

Wireless Body Area Network (WBAN) in recent years have received significant attention, due to their potential for increasing efficiency in healthcare monitoring. Typical sensors used for WBAN are low powered single transceiver devices utilizing a single channel for transmission at the Medium Access Control (MAC) layer. However, performance of these devices usually degrades when the density of sensors increases. One approach to counter this performance degradation is to exploit multiple channels at the MAC layer, where optimal usage of the channels is achieved through cooperation between the sensor nodes. In this paper we propose a cooperative WBAN environment that supports multi-hop transmission through cooperation involving both environmental sensors and WBAN nodes. Our solution extends the cooperation at the MAC layer to a cross-layered gradient based routing solution that allows interaction between WBAN and environmental sensors in order to ensure data delivery from WBANs to a distant gateway. Extensive simulations for healthcare scenarios have been performed to validate the cooperation at the MAC layer, as well as the cross-layered gradient based routing. Comparisons to other cooperative multi-channel MAC and routing solutions have shown the overall performance improvement of the proposed approach evaluated in terms of packet loss, power consumption and delay.
A randomized phase 3 study on the optimization of the combination of bevacizumab with FOLFOX/OXXEL in the treatment of patients with metastatic colorectal cancer-OBELICS (Optimization of BEvacizumab scheduLIng within Chemotherapy Scheme)

Despite the improvements in diagnosis and treatment, colorectal cancer (CRC) is the second cause of cancer deaths in both sexes. Therefore, research in this field remains of great interest. The approval of bevacizumab, a humanized anti-vascular endothelial growth factor (VEGF) monoclonal antibody, in combination with a fluoropyrimidine-based chemotherapy in the treatment of metastatic CRC has changed the oncology practice in this disease. However, the efficacy of bevacizumab-based treatment, has thus far been rather modest. Efforts are ongoing to understand the better way to combine bevacizumab and chemotherapy, and to identify valid predictive biomarkers of benefit to avoid unnecessary and costly therapy to nonresponder patients. The BRANCH study in high-risk locally advanced rectal cancer patients showed that varying bevacizumab schedule may impact on the feasibility and efficacy of chemo-radiotherapy. OBELICS is a multicentre, open-label, randomised phase 3 trial comparing in mCRC patients two treatment arms (1:1): standard concomitant administration of bevacizumab with chemotherapy (mFOLFOX/OXXEL regimen) vs experimental sequential bevacizumab given 4 days before chemotherapy, as first or second treatment line. Primary end point is the objective response rate (ORR) measured according to RECIST criteria. A sample size of 230 patients was calculated allowing reliable assessment in all plausible first-second line case-mix conditions, with a 80 % statistical power and 2-sided alpha error of 0.05. Secondary endpoints are progression free-survival (PFS), overall survival (OS), toxicity and quality of life. The evaluation of the potential predictive role of several circulating biomarkers (circulating endothelial cells and progenitors, VEGF and VEGF-R SNPs, cytokines, microRNAs, free circulating DNA) as well as the value of the early [18F]-Fluorodeoxyglucose positron emission tomography (FDG-PET) response, are the objectives of the traslational project. Overall this study could optimize bevacizumab scheduling in combination with chemotherapy in mCRC patients. Moreover, correlative studies could improve the knowledge of the mechanisms by which bevacizumab enhance chemotherapy effect and could identify early predictors of response. EudraCT Number: 2011-004997-27 ClinicalTrials.gove number, NCT01718873
Ultra-high stacks of InGaAs quantum dots for high efficiency solar cells

We report ultra-high stacks of quantum dots (QDs) for high efficiency solar cells fabricated by the intermittent deposition of InGaAs using molecular beam epitaxy. We obtained a 400-stack InGaAs/GaAs QD structure without using a strain balancing technique, in which the total number of QDs reaches 2 × 1013 cm−2. Photoluminescence and cross-sectional scanning transmission electron microscope measurements indicate that the In0.4Ga0.6As QD structure exhibits no degradation in crystal quality, no dislocations and no crystal defects even after the stacking of 400 QD layers. The external quantum efficiency and the short-circuit current density of multistacked In0.4Ga0.6As QD solar cells increase as the number of stacked layers is increased to 150. Such ultra-high stacks and good cell performance have not been reported for QD solar cells using other material systems. The performance of the ultra-high stacked QD solar cells indicates that InGaAs QDs are suitable for use in high efficiency solar cells requiring thick QD layers for sufficient light absorption.
A Novel Low-Complexity Precoded OFDM System With Reduced PAPR

The computational complexity and peak-to-average power ratio (PAPR) of conventional precoded orthogonal frequency division multiplexing (OFDM) systems can be reduced using a T-OFDM precoded system based on the Walsh-Hadamard matrix. The present paper proposes a novel precoding scheme for further reducing the computational complexity and PAPR of T-OFDM. In the proposed scheme, the precoding matrix is combined with an inverse discrete Fourier transform to construct a new transform matrix at the transmitter. Notably, the transform matrix is both unitary and circulant, with each column being a perfect Gaussian integer sequence containing just four non-zero elements of {±1,±j}. A low-complexity receiver is additionally constructed for the proposed precoding scheme. A closed-form expression is derived for the bit error rate (BER) in T-OFDM and the proposed precoding scheme under frequency-selective fading channels. The simulation results for the BER are shown to be in good agreement with the mathematical derivations. In addition, it is demonstrated that T-OFDM and the proposed scheme have an equivalent BER performance when their precoding matrices are designed in such a way as to obtain full frequency diversity. However, the proposed scheme has a better PAPR performance and a lower computational complexity than T-OFDM.
Morphology Based Text Detection and Extraction from Complex Video Scene

Text in video provides brief and important content information which is helpful to video scene understanding, annotation and searching. Most of the previous approaches to extracting text from videos are based on low-level features, such as edge, color, and texture information. However, existing methods experience difficulties in handling texts with various contrasts or inserted in a complex background. In this paper, we propose a novel framework to detect and extract the text from the video scene. A morphological binary map is generated by calculating difference between the closing image and the opening image. Then candidate regions are connected by using a morphological dilation operation and the text regions are determined based on the occurrence of text in each candidate. The detected text regions are localized accurately using the projection of text pixels in the morphological binary map and the text extraction is finally conducted. The proposed method is robust to different character size, position, contrast, and color. It is also language independent. Text region update between frames is also employed to reduce the processing time. Experiments are performed on diverse videos to confirm the efficiency of the proposed method.
Modeling and Simulation of Photovoltaic Cell / Module / Array with Two-Diode Model

6  Abstract— The purpose of this paper is to propose a MATLAB/ Simulink simulators for PV cell/module/array based on the Two-diode model of a PV cell.This model is known to have better accuracy at low irradiance levels which allows for more accurate prediction of PV systems performance.To reduce computational time , the input parameters are reduced as the values of Rs and Rp are estimated by an efficient iteration method. Furthermore ,all of the inputs to the simulators are information available on a standard PV module datasheet. The present paper present first abrief introduction to the behavior and functioning of a PV device and write the basic equation of the two-diode model,without the intention of providing an indepth analysis of the photovoltaic phenomena and the semicondutor physics. The introduction on PV devices is followed by the modeling and simulation of PV cell/PV module/PV array, which is the main subject of this paper. A MATLAB Simulik based simulation study of PV cell/PV module/PV array is carried out and presented .The simulation model makes use of the two-diode model basic circuit equations of PV solar cell, taking the effect of sunlight irradiance and cell temperature into consideration on the output current I-V characteristic and output power P-V characteristic . A particular typical 50W solar panel was used for model evaluation. The simulation results , compared with points taken directly from the data sheet and curves pubblished by the manufacturers, show excellent correspondance to the model.
Real-time monitoring of machines using Open Platform Communication

Open Platform Communication (OPC) also known as Object Linking and Embedding (OLE) for Process Control (OPC) is the platform for communication in automation and manufacturing fields among the group of networked devices. OPC standard supports the group of specifications known as OPC-Data Access (OPC-DA), OPC-Historical Data Access (OPC-HDA) and OPC-Unified Architecture (OPC-UA). In this paper, the vibration and acoustic data of an air-compressor have been recorded through accelerometer and microphone, respectively. The data is continuously monitored and archived through OPC. The sensing units are placed on predefined sensitive positions of air-compressor to record the data. The MATLAB based platform interacts with OPC server for reading and writing of data acquired from field devices. The recorded data is used for real-time monitoring and fault recognition in air-compressor. The National Instruments (NI) based four channel Data Acquisition (DAQ) module, channel input module: NI9234 and USB chassis: NIcDAQ-9171, is used for connection of sensing units. For experimental analysis, a Matrikon OPC server (2.0.0.5529) is used. MATLAB and OPC server with necessary features have been installed on the operating system to monitor the air-compressor.
Computed tomographic colonography versus colonoscopy for investigation of patients with symptoms suggestive of colorectal cancer (SIGGAR): a multicentre randomised trial

BACKGROUND
Colonoscopy is the gold-standard test for investigation of symptoms suggestive of colorectal cancer; computed tomographic colonography (CTC) is an alternative, less invasive test. However, additional investigation after CTC is needed to confirm suspected colonic lesions, and this is an important factor in establishing the feasibility of CTC as an alternative to colonoscopy. We aimed to compare rates of additional colonic investigation after CTC or colonoscopy for detection of colorectal cancer or large (≥10 mm) polyps in symptomatic patients in clinical practice.


METHODS
This pragmatic multicentre randomised trial recruited patients with symptoms suggestive of colorectal cancer from 21 UK hospitals. Eligible patients were aged 55 years or older and regarded by their referring clinician as suitable for colonoscopy. Patients were randomly assigned (2:1) to colonoscopy or CTC by computer-generated random numbers, in blocks of six, stratified by trial centre and sex. We analysed the primary outcome-the rate of additional colonic investigation-by intention to treat. The trial is an International Standard Randomised Controlled Trial, number 95152621.


FINDINGS
1610 patients were randomly assigned to receive either colonoscopy (n=1072) or CTC (n=538). 30 patients withdrew consent, leaving for analysis 1047 assigned to colonoscopy and 533 assigned to CTC. 160 (30.0%) patients in the CTC group had additional colonic investigation compared with 86 (8.2%) in the colonoscopy group (relative risk 3.65, 95% CI 2.87-4.65; p<0.0001). Almost half the referrals after CTC were for small (<10 mm) polyps or clinical uncertainty, with low predictive value for large polyps or cancer. Detection rates of colorectal cancer or large polyps in the trial cohort were 11% for both procedures. CTC missed 1 of 29 colorectal cancers and colonoscopy missed none (of 55). Serious adverse events were rare.


INTERPRETATION
Guidelines are needed to reduce the referral rate after CTC. For most patients, however, CTC provides a similarly sensitive, less invasive alternative to colonoscopy.


FUNDING
NIHR Health Technology Assessment Programme, NIHR Biomedical Research Centres funding scheme, Cancer Research UK, EPSRC Multidisciplinary Assessment of Technology Centre for Healthcare, and NIHR Collaborations for Leadership in Applied Health Research and Care.
Mannitol challenge for assessment of airway responsiveness, airway inflammation and inflammatory phenotype in asthma.

BACKGROUND
Assessment of airway inflammation in asthma is becoming increasingly important, as the inflammatory phenotype underpins the treatment response.


OBJECTIVE
This study aimed to evaluate mannitol as a tool for assessing airway responsiveness and airway inflammation in asthma, compared with hypertonic saline.


METHODS
Fifty-five subjects with stable asthma completed a hypertonic (4.5%) saline challenge and a mannitol challenge at two separate visits, performed 48-72 h apart, in random order.


RESULTS
Induced sputum was obtained from 49 (89%) subjects during the saline challenge and 42 (76%) subjects during the mannitol challenge (P>0.05). There was a significant correlation between the greatest percentage fall in forced expiratory volume in 1 s (FEV(1)) (r=0.6, P<0.0001), the dose-response slope (r=0.73), cumulative dose (r=0.55) and PD15 (r=0.46) for mannitol and hypertonic saline. The greatest percentage fall in FEV(1) to mannitol was less in non-eosinophilic asthma. There was a lower total cell count in mannitol vs. hypertonic-saline-induced sputum. However, sputum eosinophils and neutrophils were not significantly different. Using mannitol, a higher proportion of subjects were classified as having eosinophilic asthma. There were no differences in IL-8, neutrophil elastase or matrix-metalloproteinase 9 concentrations in sputum samples induced with mannitol or hypertonic saline.


CONCLUSION
We conclude that mannitol can be used to induce good-quality sputum, useful for analysis of inflammatory mediators and for predicting the inflammatory phenotype in asthma.
E-Learning: Strategies for Delivering Knowledge in the Digital Age

80 ISSN 1436-4522. © International Forum of Educational Technology & Society (IFETS). The authors and the forum jointly retain the copyright of the articles. Permission to make digital or hard copies of part or all of this work for personal or classroom use is granted without fee provided that copies are not made or distributed for profit or commercial advantage and that copies bear the full citation on the first page. Copyrights for components of this work owned by others than IFETS must be honoured. Abstracting with credit is permitted. To copy otherwise, to republish, to post on servers, or to redistribute to lists, requires prior specific permission and/or a fee. Request permissions from the editors at kinshuk@massey.ac.nz. E-Learning: Strategies for Delivering Knowledge in the Digital Age (Book Review)
Efficient simulation of inextensible cloth

Many textiles do not noticeably stretch under their own weight. Unfortunately, for better performance many cloth solvers disregard this fact. We propose a method to obtain very low strain along the warp and weft direction using Constrained Lagrangian Mechanics and a novel fast projection method. The resulting algorithm acts as a velocity filter that easily integrates into existing simulation code.
Alendronate is more effective than etidronate for increasing bone mass in osteopenic patients with primary biliary cirrhosis

OBJECTIVES:Osteopenia increases the morbidity of primary biliary cirrhosis (PBC). In this study, we have compared two bisphosphonates, alendronate and cyclical etidronate, that inhibit osteoclast-mediated bone resorption and have examined their effects on bone mass in patients with this disease.METHODS:A total of 32 women with PBC were randomly assigned to receive alendronate (10 mg/day) or etidronate (400 mg/day) for 14 days every 3 months. Bone mineral density of the lumbar spine and proximal femur were measured initially and every 6 months. Bone fractures and markers of bone mineral metabolism were also evaluated.RESULTS:Sixteen patients were allocated to each group, which were comparable with respect to the severity of PBC and osteopenia. Thirteen patients in each group completed the 2-yr trial. Both treatments increased bone mineral density after 2 yr, although the increase at the lumbar spine and at the proximal femur was significantly higher in patients receiving alendronate than in patients on etidronate. This higher effect of alendronate paralleled with changes in the biochemical markers of bone turnover. No patient developed new vertebral fractures, but new peripheral fractures were detected in two patients on alendronate and in one on etidronate. There were no serious adverse effects. Neither treatment impaired liver function or cholestasis.CONCLUSIONS:Alendronate effectively increases bone mass and has greater antiresorptive power than etidronate in patients with primary biliary cirrhosis, and is associated with minor or no side effects.
First-time mothers: social support, maternal parental self-efficacy and postnatal depression.

AIMS AND OBJECTIVES
To examine the relationships between social support, maternal parental self-efficacy and postnatal depression in first-time mothers at 6 weeks post delivery.


BACKGROUND
Social support conceptualised and measured in different ways has been found to positively influence the mothering experience as has maternal parental self-efficacy. No research exists which has measured the relationships between social support, underpinned by social exchange theory and maternal parental self-efficacy using a domain-specific instrument, underpinned by self-efficacy theory and postnatal depression, with first-time mothers at 6 weeks post delivery.


DESIGN
A quantitative correlational descriptive design was used.


METHOD
Data were collected using a five-part questionnaire package containing a researcher developed social support questionnaire, the Perceived Maternal Parental Self-Efficacy Scale and the Edinburgh Postnatal Depression Scale. Four hundred and ten mothers completed questionnaires at 6 weeks post delivery.


RESULTS
Significant relationships were found between functional social support and postnatal depression; informal social support and postnatal depression; maternal parental self-efficacy and postnatal depression and informal social support and maternal parental self-efficacy at 6 weeks post delivery.


CONCLUSION
Nurses and midwives need to be aware of and acknowledge the significant contribution of social support, particularly from family and friends in positively influencing first-time mothers' mental health and well-being in the postpartum period. The development of health care policy and clinical guidelines needs to define and operationalise social support to enhance maternal parental self-efficacy.


RELEVANCE TO CLINICAL PRACTICE
These findings suggest that nurses and midwives need to be cognisant of the importance of social support for first-time mothers in both enhancing maternal parental self-efficacy and reducing postnatal depressive symptomatology in the early postpartum period.
Multirate Lane-Keeping System With Kinematic Vehicle Model

In this paper, a novel multirate lane-keeping system (LKS) is introduced by using a kinematic-based model considering a look-ahead distance. First, we developed a kinematic lateral motion model for LKS with respect to the road. To increase a system damping of vehicle, the unique look-ahead output measurement matrix was introduced. The decentralized multirate lane-keeping control scheme with a multirate Kalman filter was also applied to resolve the asynchronous and irregular sampling time of multi sensors in autonomous vehicles. We validated the performance of the proposed kinematic-based multirate LKS using the dynamic vehicle solver CarSim, MATLAB/Simulink, and electric power steering hardware-in-the-loop system. Experimental validation was also conducted using a real test vehicle. Both simulation and experimental results showed that the proposed kinematic-based LKS performed lane-keeping capability comparable to that of dynamic-based LKS. In particular, the experimental results showed that the proposed method, compared to a human driver, can also maintain the lane within reasonable specifications. The experimental validation was performed at vehicle speeds of up to 120 km/h.