varunr14/newsummary huggingface dataset:
This study evaluates the effect of presentation media on the performance level of visual fatigue and subjective preference of those taking visuospatial tests . Fifty university students participated and performed three visuospatial short term memory tests and three visuospatial ability tests by using both types of display media . The display medium substantially affected all of the measured variables . On average the paper pencil test scores of the visuospatial short term memory tests were about 10 higher and the answer time was about 20 shorter than those of the PC tablet tests . The average paper pencil test score of the visuospatial ability tests was about 35 higher than the average test score of the PC tablet test . The visuospatial performance was substantially decreased under the PC tablet condition compared with that under the pencil paper condition . In addition visual fatigue was greater when participants used the PC tablet than when they used a pencil and paper . 


Summary: The display medium affects the visuospatial short term memory performance. The visuospatial ability of paper pencil test was higher than the tablet PC test. The visual fatigue of paper pencil test was lower than tablet PC test.
This paper examines the problem of rate allocation for multicasting over slow Rayleigh fading channels using network coding . In the proposed model the network is treated as a collection of Rayleigh fading multiple access channels . In this model rate allocation scheme that is based solely on the statistics of the channels is presented . The rate allocation scheme is aimed at minimizing the outage probability . An upper bound is presented for the probability of outage in the fading multiple access channel . A suboptimal solution based on this bound is given . A distributed primal dual gradient algorithm is derived to solve the rate allocation problem . 


Summary: We propose a distributed rate allocation scheme for multicasting with network coding. The network is modeled as a collection of slow Rayleigh fading MACs. The rate allocation scheme is based solely on the statistics of the channels. An upper bound is presented for the probability of outage in the fading MAC. The distributed rate allocation scheme is aimed at minimizing the outage probability.
Two novel carbazole anthracene hybrided molecules namely 2 9 ethyl 9H carbazole and 2 7 di 9 ethyl 9H carbazole were designed and synthesized via palladium catalyzed coupling reaction . The anthracene was attached either at the 2 site or at both 2 7 sites of the central carbazole core to tune the conjugation state and the optoelectronic properties of the resultant molecules . Both of them show good solubility in common organic solvents . They also possess relatively high HOMO levels that would facilitate efficient hole injection and be favorable for high power efficiencies when used in organic light emitting devices . AnCz and 2AnCz were used as non doped emitter to fabricate OLEDs by vacuum evaporation . Good performance was achieved with maximum luminance efficiency of 2.61cdA 1 and CIE coordinates of for AnCz and 9.52cdA 1 and for 2AnCz . 


Summary: Synthesis and luminescent properties of carbazole anthracene hybrided molecules were studied. Organic light emitting diodes were fabricated by vacuum evaporation using these materials as non doped emitter. Deep blue electroluminescence with good performance was obtained.
At present in mobile sensing environment almost all the existing secure large data objects dissemination algorithms are centralized . The centralized servers publicize the sensing tasks and are also the authorized parties to initiate sensed data dissemination . This paper proposes a novel social role and network coding based security distributed data dissemination algorithm referred as PRXeluge to overcome the shortcomings of existing centralized data dissemination algorithms . Unlike the existing participatory sensing applications in PRXeluge service provider just publicizes the sensing tasks and utilizes a conditional proxy re signature technique to authorize different social roles such as authorized smartphone users to be utilized as a contracted picture reporters which sense the data and directly disseminate the sensed large data . Furthermore PRXeluge proposes the XOR network coding scheme on the basis of Seluge security framework . To maximize the number of successfully decoded packets PRXeluge introduces a neighbor node table to determine the optimal coding scheme . Experimental results reveal that the proposed PRXeluge shows better performance in terms of lower data packet transmission and dissemination delay compared to that of Seluge . Furthermore it is observed from the experiment that the proposed algorithm is stronger as compared to that of centralized scheme and performs the fine grain access control without giving any additional load to subscriber nodes . 


Summary: Social role based distributed Large Data Object dissemination framework is proposed. XOR network coding method is introduced in the proposed algorithm. XOR network coding and security framework are seamlessly integrated into PRXeluge. PRXeluge does not bring any additional load to the subscriber nodes.
Data hiding also known as information hiding plays an important role in information security for various purposes . Reversible data hiding is a technique that allows distortion free recovery of both the cover image and the secret information . In this paper we propose a new reversible data hiding scheme that is based on the Sudoku technique and can achieve higher embedding capacity . The proposed scheme allows embedding more secret bits into a pair of pixels while guaranteeing the good quality of the stego image . The experimental results showed that the proposed scheme obtained higher embedding capacity than some other previous schemes . In addition our proposed scheme maintained the good visual quality of the stego image which outperforms some existing schemes . 


Summary: Sudoku technique is used for data embedding. A reversible data hiding scheme that is based on the Sudoku technique and can achieve the higher embedding capacity. The reference matrix is built and applied to obtain better embedding capacity. The experimental results showed that the proposed scheme obtained higher embedding capacity than some other previous schemes. The proposed scheme also achieved more consistent results for the different test images.
Software as a service is gaining momentum for all business applications including Unified Communications as a Service . In this context user identity will play a key role in connecting the future fragmented communication suites in both corporations and cloud SaaS providers . However SaaS solutions impose strong security challenges to the enterprise s Identity Management since cloud services need to be provided with the employees identities . UCaaS solutions should therefore enforce security properties such as trust relationship anonymity or control on information disclosure . WebRTC is reinforcing the trend towards cloud based UC by adding real time voice and video capabilities into browsers . WebRTC does not tackle IdM and hence it is not evident how WebRTC based cloud services can meet the corporate requirements on IdM . In this paper we discuss various IdM models for cloud based corporate services and we introduce the major requirements for managing user identities in UCaaS . We assess the impacts of these requirements on WebRTC based UC services . We finally propose a slight modification of WebRTC to meet the corporate requirements on IdM . 


Summary: Dissertation about identity centric UCaaS Proposed models for Identity and Access Management IAM in corporate SaaS List of requirements regarding identity for UC Adaptation of WebRTC to meet the identity requirements of future identity centric UCaaS
This paper proposes a novel pixel circuit for high resolution high frame rate and low power AMOLED displays that is implemented with one driving n channel TFT six switching n channel poly Si TFTs and a storage capacitor . The proposed pixel circuit adopts the voltage programming scheme for threshold voltage compensation . Because the whole line time is in use only for charging the data voltage this pixel circuit is applicable to high resolution and frame rate displays . In addition it compensates voltage variation of OLEDs and voltage drop of supply lines at lower power consumption . On the average the non uniformity of a proposed circuit is reduced to 2.5 compared to 7.1 of the previous one at a 240Hz full HD display . On the other hand the compensation voltage error which is caused by feed through and charge injection noises from falling control signals of switching TFTs is much less in the proposed scheme than in the previous 5T2C structure . The average error of the proposed circuit is reduced to 0.18V compared to 0.75V of the previous one . The initialization power consumption of the 7T1C circuit is reduced to 98mW compared to 530mW of the 5T2C circuit and the average dynamic power saving ratio of data drivers is estimated in the 7T1C pixel as 98.7 over the 5T2C one for 24 test images . 


Summary: A novel 7T1C pixel circuit is proposed for high resolution high frame rate and low power AMOLED displays. The whole line time is in use only for charging the data voltage. The current non uniformity is reduced to 2.5 at a 240Hz full HD AMOLED display. The average compensated voltage error is reduced to 0.18V compared to 0.75V of 5T2C. The initialization power consumptions are 98mW and the dynamic power saving is 98.7 over 5T2C.
We compare different algorithms for computing eigenvalues and eigenvectors of a symmetric band matrix across a wide range of synthetic test problems . Of particular interest is a comparison of state of the art tridiagonalization based methods as implemented in Lapack or Plasma on the one hand and the block divide and conquer algorithm as well as the block twisted factorization method on the other hand . The BD C algorithm does not require tridiagonalization of the original band matrix at all and the current version of the BTF method tridiagonalizes the original band matrix only for computing the eigenvalues . Avoiding the tridiagonalization process sidesteps the cost of backtransformation of the eigenvectors . Beyond that we discovered another disadvantage of the backtransformation process for band matrices In several scenarios a lot of gradual underflow is observed in the accumulation of the transformation matrix and in the backtransformation step . According to the IEEE 754 standard for floating point arithmetic this implies many operations with subnormal numbers which causes severe slowdowns compared to the other algorithms without backtransformation of the eigenvectors . We illustrate that in these cases the performance of existing methods from Lapack and Plasma reaches a competitive level only if subnormal numbers are disabled . Overall our performance studies illustrate that if the problem size is large enough relative to the bandwidth BD C tends to achieve the highest performance of all methods if the spectrum to be computed is clustered . For test problems with well separated eigenvalues the BTF method tends to become the fastest algorithm with growing problem size . 


Summary: Single core performance of symmetric band eigensolvers is compared experimentally. Tridiagonalizing a band matrix produces subnormal numbers and degrades performance. Methods without tridiagonalizing the full band matrix have performance advantages. For clustered eigenvalues the block divide and conquer BD C method is fastest. For separated eigenvalues and narrow bands the BTF method is fastest.
A series of Eu3 activated Li2Mg23 materials were synthesized by high temperature solid state reactions . The phosphor can be effectively excited by 394nm near ultraviolet light and emit intense red light with high color purity . Prepared phosphors can be indexed to LMW with particular lyonsite structure . The occupation of Eu3 in LMW is selective . Most of Eu3 comes into 1A sites without inversion symmetry . The present research suggests that LMW is a suitable host for luminescence applications and Eu3 activated LMW is a promising phosphor for phosphor converted white light emitting diodes . 


Summary: Eu3 doped Li2Mg2 WO4 3 is a promising red phosphor. Eu3 doped Li2Mg2 WO4 3 can be effectively excited with multiple excitation wavelength. The occupation of Eu3 in Li2Mg2 WO4 3 was discussed in detail.
The widespread use of mobile and high definition video devices is changing Internet traffic with a significant increase in multimedia content especially video on demand and Internet protocol television . However the success of these services is strongly related to the video quality perceived as by the user also known as quality of experience . This paper reviews current methodologies used to evaluate the quality of experience in a video streaming service . A typical video assessment diagram is described and analyses of the subjective objective and hybrid approaches are presented . Finally considering the moving target scenario of mobile and high definition devices the text outlines challenges and future research directions that should be considered in the measurement and assessment of the quality of experience for video streaming services . 


Summary: Concise and up to date review of quality assessment for video streaming services. Description of a typical video assessment process. Analysis of current research on subjective objective and hybrid QoE assesment. Discussion of future trends and challenges for QoE in video streaming services.
Traditional wireless sensor networks are constrained by limited battery energy that powers the sensor nodes which impedes the large scale deployment of WSNs . Wireless power transfer technology provides a promising way to solve this problem . With such novel technology recent works propose to use a single mobile charger traveling through the network fields to replenish energy to every sensor node so that none of the nodes will run out of energy . These algorithms work well in small scale networks . In large scale networks these algorithms however do not work efficiently especially when the amount of energy the MC can provide is limited . To address this issue multiple MCs can be used . In this paper we investigate the minimum MCs problem for two dimensional wireless rechargeable sensor networks i.e . how to find the minimum number of energy constrained MCs and design their recharging routes in a 2D WRSN such that each sensor node in the network maintains continuous work assuming that the energy consumption rate for all sensor nodes are identical . By reduction from the Distance Constrained Vehicle Routing Problem we prove that MinMCP is NP hard . Then we propose approximation algorithms for this problem . Finally we conduct extensive simulations to validate the effectiveness of our algorithms . 


Summary: We are the first to consider the minimum mobile charger problem for 2D wireless rechargeable sensor networks. We prove that MinMCP is NP hard. We propose approximation algorithms to address MinMCP. We conduct extensive simulations to verify our analytical findings.
Spiral segments are useful in the design of fair curves . They are important in CAD CAM applications the design of highway and railway routes trajectories of mobile robots and other similar applications . The quintic Pythagorean hodograph curve discussed in this article is polynomial it has the attractive properties that its arc length is a polynomial of its parameter and the formula for its offset is a rational algebraic expression . This paper generalises earlier results on planar PH quintic spiral segments and examines techniques for designing fair curves using the new results . 


Summary: Earlier characterisations of PH quintic spirals are generalised to avoid an endpoint of zero curvature. The analysis allows the design of C shaped PH quintic curves without flatspots. Techniques for designing fair curves using these new spiral segments are presented.
The purpose of this article is the construction of a normalized basis for a quadratic condensed Powell Sabin 12 macro element space introduced by Alfeld et al . . The basis functions have a local support they are nonnegative and they form a partition of unity . The construction of this basis is adopted from Dierckx and Speleers and is based on the determination of a set of triangles that must contain a specific set of points . The proposed basis can only be constructed on triangulations with a maximal angle less than 


Summary: B spline basis of the quadratic condensed Powell Sabin 12 spline space. Determination of control points. Discrete and differentiable quasi interpolants.
Companies and particularly their Chief Security Officers want to ensure that their Security Policies are followed but this becomes a difficult goal to achieve at the point employees are able to use or bring their personal devices at work in a practice that has been named Bring Your Own Device . Since this BYOD philosophy is being adopted by many companies everyday a number of solutions have appeared in the market so that it can be implemented in a secure way and comply with the Security Policies mentioned above . In this paper we propose a taxonomy to classify the features of BYOD systems . This taxonomy is used to present an overview of BYOD security solutions . Also we describe a novel adaptive and free software system named MUSES able to securely manage BYOD environments . MUSES has been developed to cope with security issues with regard to enterprise security policies but as a user centric tool . It considers users behavior in order to adapt improve and even increase the defined set of security rules . To do this the system applies Machine Learning and Computational Intelligence techniques being also able to predict future security incidences produced by these users . The MUSES framework which has released its first prototype in early 2015 is compared with the most relevant solutions offered by other companies to deal with the same issues remarking the advantages that our system offers with respect to them . 


Summary: Survey on BYOD solutions state of the art . Background in corporate security. Novel user centric self adaptive system. Open source multiplatform system. Architecture description. Self adaptation. Applications of Data Mining in this scope. Applications of Machine Learning in this scope. Applications of Evolutionary Algorithms in this scope. Beyond the state of the art. With respect to existing tools. With respect to the scientific part.
Recently a new approach to piecewise polynomial spaces generated by B spline has been presented by T. Dokken T. Lyche and H.F. Pettersen namely Locally Refined splines . In their recent work they define the LR B spline collection and provide tools to compute the space dimension . Here different properties of the LR splines are analyzed in particular the coefficients for polynomial representations and their relation with other properties such as linear independence and the number of B splines covering each element . 


Summary: A polynomial representation formula for the LR B spline collection is shown. The number of functions of the LR B spline collection whose support contains a point is studied. The close relation between the above properties is asserted.
We observe that the laborious collection of location fingerprints that could also potentially change with time and space remains a hurdle towards the widespread deployment of indoor and outdoor positioning systems using the Wi Fi . Motivated by this we focus on the error bound analysis of indoor Wi Fi fingerprint based positioning for intelligent Access Point placement optimization by using the Fisher Information Matrix to characterize the relationship between the positioning errors and signal distributions . We first derive the closed form error bounds with respect to different system parameters . Second we use the Simulated Annealing algorithm to conduct the Wi Fi AP placement optimization towards the lowest error bounds . Finally we present the detailed discussion extensive simulation and experiment results . 


Summary: The system relies on the fisher information matrix to derive the error bounds of Wi Fi fingerprint based positioning. The theoretical relationship between the positioning errors and signal distributions is presented. The error bound of Wi Fi fingerprint based positioning is an effective criterion for Wi Fi access point deployment. The intelligent access point optimization approach performs well in time consumption.
To study the interface effects on the device performance we fabricated indium gallium zinc oxide thin film transistors with a two stack gate insulator structure . The two stack gate insulator was composed of a thick main insulator and a thin interfacial insulator the main insulator determines the effective permittivity of the gate insulator and the interfacial insulator regulates the gate active interface properties . The a IGZO TFTs had about 10cm2 V 1 s 1 field effect mobility values and 107 108 switching ratios . The dependences of FE and threshold voltage V TH on the channel width to length ratio were different according to the electron affinity of the interfacial insulator . The contact resistance between the source drain electrode and the active layer and the electron injection barrier height from the active layer to the interfacial gate insulator layer could explain this finding . In this work we successfully demonstrated the method to distinguish the interface related phenomena from the insulator permittivity related phenomena . 


Summary: Design and demonstration of a two stack gate insulator structure for analysis of interface effects. Dependence of field effect mobility threshold voltage on contact resistance electron affinity. High k gate dielectrics such as HfO2 and ZrO2 have been found to have inferior interface properties.