Miracle-dz/UniFAR-FTUs huggingface dataset:
The influence of word frequency on semantic word substitutions in aphasic naming

Background: Semantic word substitutions are frequent errors of aphasic speakers when naming a picture. The role of word frequency in the generation of these semantic errors provides an important testing ground for models of lexical access. The discrete two‐stage model of Levelt, Roelofs, and Meyer (1999) predicts that frequency should not play a role in semantic errors. In contrast, cascading and interactive models of lexical access allow for an influence of frequency on lexical selection. Aims: To assess the role of word frequency in the generation of semantic substitutions. Methods & Procedures: We re‐analysed a large corpus of aphasic semantic word substitutions in response to target words from carefully controlled semantic categories. Frequency of these errors was compared to randomly selected pseudo‐errors from the same semantic category. Outcomes & Results: Errors were more frequent than randomly selected competitors from the same semantic category. Conclusions: The results support interactive or cascading models of lexical access and speak against the discrete two‐stage model of lexical access. The data are discussed with regard to models of lexical access and to previous studies that failed to find a frequency effect for aphasic semantic naming errors. We would like to thank the aphasic patients for participating in this research, and the speech therapists for referring the patients to us. The idea to compare word frequency of the actual semantic errors and randomly chosen competitors came from an anonymous reviewer of a previous paper of our group. We are very grateful for this suggestion. We would like to thank Myrna Schwartz and an anonymous reviewer for helpful comments on a previous version of this paper.
A wide-band ultralinear amplifier from 3 to 300 MHz

The design of a low-distortion, wide-band amplifier with 75-/spl Omega/ input and output impedances is described. Simultaneous shunt and series feedback is used and design equations are derived for terminal impedances, forward gain, loop gain, and noise figure. The advantages of a Darlington connection for low distortion are described. For 0-dBm signal levels, the amplifier achieves third-order intermodulation products of -88 dB relative to the carrier at 300 MHz and 12 channel cross-modulation (CM) of -77 dB at channel 13.
A Study on Quality Factors of Web Enabled Collective Intelligence as a Donor for Business Success

As Information Technology (IT) has been rapidly developing and globalization also has been taking place in each and every corner business throughout the world (주재훈, 2009; Joo and Normatov, 2010, Park and Moon, 2007), collective intelligence (CI) has already become one of the determinants of successful competitive strategy of companies such as Threadless, InnoCentive, iStockphoto, Panda Security, and Wikipedia. There is no doubt that the emergence of the Internet, social networks, and other CI tools enabled collective intelligence and contributed heavily to its development. Organizations that realize the importance of CI in knowledge management and develop appropriate systems to adopt it in their service and product development are withholding their strong competitive advantage in the market. Individuals from all over the world are now participating in the process of creating valuable knowledge in social networks and bookmarks, blogs and wikis. However, it is important for organizations that are eager to apply CI in their businesses to consider what really motivates and drives individuals to participate in the CI process. Therefore, it is necessary to identify the main
Coded modulation with non-standard signal sets for wireless OFDM systems

This paper proposes a scheme that trades complexity for increased diversity and a reduction in the peak-to-mean envelope power ratio (PMEPR) in wireless orthogonal frequency division multiplexing (OFDM) systems. The key idea is to employ non-standard signal sets with small dimension matched to the OFDM framework; these signal sets are chosen to maximize the diversity of an uncoded system under a constraint to control the system PMEPR. These signal sets allow coded modulation schemes to achieve diversity equal to the product of the Hamming distance of the scheme and the frequency diversity of the channel, while still allowing optimal combined equalization/decoding of reasonable complexity in symbol-interleaved (as opposed to bit-interleaved) coded modulation schemes. Numerical results are presented both for systems employing uncoded modulation and for systems employing bit-interleaved coded modulation (BICM). We conclude that the proposed BICM system can be viewed as a hybrid of a coded OFDM system and a coded single-carrier system employing a soft-output equalizer, thus providing the system designer a possible implementation for the correct combination of the two systems for a given application.
Sampling "the new" in New Literacies

This book "samples" work in the broad area of new literacies research on two levels. First, it samples some typical examples of new literacies. These are video gaming, fan fiction writing, weblogging, using websites to participate in affinity practices, and social practices involving mobile computing. The question of what it is about these practices that makes us think of them as "new" and as "literacies" will occupy much of this introductory chapter. Second, it samples from among the wide range of approaches potentially available for researching and studying new literacies. The studies assembled in this collection are all examples of what is referred to as research undertaken from a sociocultural perspective on literacy. New literacies can be studied from a range of research and theoretical orientations (cf Leu et al. forthcoming). For reasons that will become apparent from our account of "new literacies," however, a sociocultural perspective is especially appropriate and valuable for researching new literacies.
User satisfaction with computer-mediated communication systems

Interactive computer systems should be viewed as "socio-technical" systems whose acceptance is influenced by an interaction among characteristics of the individual users, the groups and organizations in which they are implemented, and the computer systems themselves. Four months after completing baseline questionnaires, new users of four computer-mediated communication systems (CMCS) answered follow-up questionnaires which included a number of items measuring subjective satisfaction. Factor analysis identified two primarily instrumental dimensions (satisfaction with the Interface and with system Performance), and two primarily social-emotional dimensions (Unexpressive---perceived inadequacy of the system for expressive, emotional, or personal communication---and Mode Problems with computer-mediated communication). The strongest correlates of Interface satisfaction are differences in system software and documentation, interacting with baseline attitudes and characteristics of the individual users. By contrast, the strongest correlates of the Unexpressive factor include such group-level variables as frequency of previous (off-line) communication with the group, and attitudes towards the group task. Thus to insure a successful implementation, managers must consider the "fit" between a CMCS and a particular work group.
The role of the electronic portfolio in enhancing Information and Communication Technology and English language skills: the voices of six Malaysian undergraduates

This study investigated the effects of the construction and development of electronic portfolios (e-portfolios) on a small user population at a public university in Malaysia. The study was based on a three-month Information and Communication Technology (ICT) and language learning course offered to the undergraduates of the university. One of the key components of the course was the construction and development of an e-portfolio. The purpose of this study is to uncover the impact of this class project on student development of computer and language learning skills. The problems faced in the developmental process will also be discussed. A qualitative case study approach involving interviews with six respondents was utilised in collecting and analysing the data. A questionnaire was used to support the qualitative data. The findings revealed that the e-portfolios had a positive impact on the student development of computer and writing skills.
Accurate prediction of VoIP traffic mean bit rate

An easy closed form for prediction of the mean bit-rate of one conversation generated by SID-capable speech codecs as a function of the codec and the number of frames per packet used is presented. The predicted mean bit-rate is compared to measured data and to the traditional ON-OFF model prediction, demonstrating the accuracy of the model. Results can also be applied to the output link capacity dimensioning when several homogeneous voice sources are multiplexed.
E-Moderation of Synchronous Discussions in Educational Settings: A Nascent Practice

E-moderation has been a common practice in asynchronous discussions of postsecondary courses. We consider here e-moderation of synchronous discussions in the school context. We adopt a design research approach to elaborate an environment, the Argunaut system, that fits the reality of classrooms in which moderation of several small-group synchronous discussions in parallel is desirable. We describe the Argunaut system and then describe an experiment in which a moderator could elaborate several strategies in 2 synchronous discussions (1 with 2 groups in parallel and 1 with 4 groups in parallel). Through the technique of cued retrospective reporting, we could identify those strategies and could show how technology and moderation are interwoven. We then assessed whether the actions of the moderator had some positive impact on the flow of the discussions. The positive findings that emerge from this study indicate that teachers can enact this novel practice in classrooms, enabling by such proper guidance for productive engagement in the synchronous discussions of many students in the same class.
The effect of tides on the Fornax dwarf spheroidal galaxy

The authors thank M. Breddels for providing Fornax's LOS velocity-dispersion profile measured in elliptical annuli and the referee, M. Wilkinson, for useful comments. GB thanks the INAF - Bologna for the hospitality during part of this work and gratefully acknowledges support through a Marie-Curie action Intra European Fellowship, funded by the European Union Seventh Framework Programme (FP7/2007-2013) under Grant agreement number PIEF-GA-2010-274151, as well as the financial support by the Spanish Ministry of Economy and Competitiveness (MINECO) under the Ramon y Cajal Programme (RYC-2012-11537). AS acknowledges financial support from PRIN INAF 2011 ‘Multiple populations in globular clusters: their role in the Galaxy assembly’ (PI E. Carretta). CN thanks the Instituto de Astrofisica de Canarias for the hospitality and acknowledges financial support from PRIN MIUR 2010-2011, project ‘The Chemical and Dynamical Evolution of the Milky Way and Local Group Galaxies’, prot. 2010LY5N2T.
Rotation periods of late-type dwarf stars from time series high-resolution spectroscopy of chromospheric indicators

We determine rotation periods of a sample of 48 late F-type to mid-M dwarf stars using time-series high-resolution spectroscopy of the Ca II H&K and H-alpha chromospheric activity indicators. We find good agreement between the rotation periods obtained from each of these two indicators. An empirical relationship between the level of chromospheric emission measured by log (R'HK) and the spectroscopic rotation periods is reported. This relation is largely independent of the spectral type and the metallicity of the stars and can be used to make a reliable prediction of rotation periods for late K to mid-M dwarfs with low levels of activity. For some stars in the sample, the measured spectroscopic rotation periods coincide, or are very close, to the orbital periods of postulated planets. In such cases, further studies are needed to clarify whether the associated periodic radial velocity signals reveal the existence of planets or are due to magnetic activity.
What can we learn about wellbeing in school

In recent years, the term wellbeing has become more common as an explicit educational aim. Despite its frequent use, it is often broadly applied, and rarely explicitly defined. Typically, wellbeing is described in education policy in ways that align conceptual pairings common in political discourse, including wealth, health, and happiness. Given the attention wellbeing is receiving by politicians around the world, this is an important time to consider if common uses of the term are relevant to and resonate with those in the school context, particularly amongst those on the cusp of entry into their adult lives. Here, I present data collected over a three day teaching and learning event in which students were invited to share their understandings of wellbeing as they worked to accomplish tasks related to their school examinations. Soutter, Gilmore, & Oâ€™Steenâ€™s (2010) framework for wellbeing served as the conceptual lens through which data were analysed. The central finding to emerge was that wellbeing is conceptualised by students as a multi-dimensional, complex construct that holds both instrumental and intrinsic value for them as individuals, but that educational experiences did not play a prominent role in their visual or verbal communication about wellbeing. Through the discussion, this paper attempts to â€œcreate spaceâ€ to consider wellbeingâ€™s role in the senior secondary context.
The Effects of Image Set Size and Time Pressure on Human Performance and Mental Workload in a Cyber Image Search Task

Visual image search on the web is a common behavior that provides people immediate access to the world of published graphical information and the power to search for a desired image. Previous research in the visual search literature primarily focused on the visual search performance (search speed and accuracy), and few studies paid attention to the investment of mental resources in a visual search task. In this study, 40 participants were recruited to perform an image search task. Image set size and time pressure served as two within-subject variables. Performance was evaluated in terms of image search reaction time (RT), the slope of RT × set size function, and search accuracy. Mental workload was assessed based on four physiological indices (heart rate, the power in the 0.1 Hz component of heart rate variability, respiration, and endogenous eye blink) and subjective ratings. The current study found that, regardless of the manipulation of time pressure, the average image search reaction time decreased as the set size increased, producing shallow slopes of the RT × set size functions. There was a positive relationship between task difficulty and mental workload. Higher mental workload was observed when people performed an image search task under time pressure. Moreover, the power in the 0.1 Hz component of heart rate variability was more sensitive to measures relatively low or moderate changes in mental workload.
The Importance Of Oral Presentations For University Students

This paper aims at presenting the specifics of designing oral presentations for university students. Oral presentations are becoming an important part of language teaching, especially in the university environment. Teaching students to design effective oral presentations presupposes two goals, namely, enabling students to function successfully in the future professional surrounding, and preparing them for their possible further academic career. For both directions, the author of this text, an ESP lecturer and syllabus designer, concludes from her own teaching experience that teaching presentations is a necessity if students are to perform well both in professional and academic settings. Since oral presentations involve multi-skills, a carefully planned and constructed guideline will help develop students' receptiveness to oral presentations. By making students aware of basic points, types, characteristics and styles of scientific and technical communication, the paper is to serve as a starting point in an attempt to make them expand and perfect their oral presentation skills. In a pilot study a conceptual framework has been used to illustrate our starting point. It has been examined the importance of designing an effective oral presentations at the university level. DOI: 10.5901/mjss.2014. v5n19p468
Performance Comparative in Classification Algorithms Using Real Datasets

Classification is one of the most common data mining tasks, used frequently for data categorization and analysis in the industry and research. In real-world data mining sometimes it mainly deals with noisy information sources, because of data collection inaccuracy, device limitations, data transmission and discretization errors, or man-made perturbations frequently result in imprecise or vague data which is called as noisy data. This noisy data may decrease performance of any classification algorithms. This paper deals with the performance of different classification algorithms and the impact of feature selection algorithm on Logistic Regression Classifier, How it controls False Discovery Rate (FDR) and thus improves the efficiency of Logistic Regression classifier.
Berkeley Lab Checkpoint/Restart (BLCR) for Linux Clusters

This article describes the motivation, design and implementation of Berkeley Lab Checkpoint/Restart (BLCR), a system-level checkpoint/restart implementation for Linux clusters that targets the space of typical High Performance Computing applications, including MPI. Application-level solutions, including both checkpointing and fault-tolerant algorithms, are recognized as more time and space efficient than system-level checkpoints, which cannot make use of any application-specific knowledge. However, system-level checkpointing allows for preemption, making it suitable for responding to ''fault precursors'' (for instance, elevated error rates from ECC memory or network CRCs, or elevated temperature from sensors). Preemption can also increase the efficiency of batch scheduling; for instance reducing idle cycles (by allowing for shutdown without any queue draining period or reallocation of resources to eliminate idle nodes when better fitting jobs are queued), and reducing the average queued time (by limiting large jobs to running during off-peak hours, without the need to limit the length of such jobs). Each of these potential uses makes BLCR a valuable tool for efficient resource management in Linux clusters.
Robustness capabilities of transponded commercial satellite communications

The robustness of transponding commercial satcom to uplink jamming is investigated. It is assumed that the transponder is designed to handle a certain number of simultaneous users using FDMA or TDMA and without considering jamming. The transponder is assumed to have one of the standard nonlinearities. It is shown that multiple access combined with high power amplifier (HPA) backoff provide a form of protection from jamming akin to spread spectrum. The vulnerability to attack on a single user can be overcome by introducing spread spectrum. The jamming level needed to cause all users to have unacceptable error rates must be comparable to the sum of the user powers, and it was found that this level is generally slightly lower than that to cause the transponder to go into saturation. Therefore, transponders were found to have useful inherent robustness. Generic examples are used to illustrate these conclusions.
SELF-CONSTRUAL, PERSONALIZATION, USER EXPERIENCE, AND WILLINGNESS TO USE CODESIGN FOR ONLINE GAMES

This paper examines the effect of self-construals, personalized services, and user experience on people's willingness to engage in codesign behaviors for online games. Individual psychological factors might provide a basis for codesign willingness. Using data gathered from 257 online game users and a structural equation model approach, this study shows that independent and interdependent self-construals can predict two motivations, namely, using codesign to obtain a user experience and using codesign to create a personalized service. Both motives mediate the relationship between self-construal and willingness to use codesign, but personalized service has a stronger effect. This study provides a unique explanation that firms can use to understand the psychological logic underlying user codesign willingness.
You will be …: a study of job advertisements to determine employers' requirements for LIS professionals in the UK in 2007

Purpose – The purpose of this paper is to investigate what employers seek when recruiting library and information professionals in the UK and whether professional skills, generic skills or personal qualities are most in demand.Design/methodology/approach – A content analysis of a sample of 180 advertisements requiring a professional library or information qualification from Chartered Institute of Library and Information Professional's Library + Information Gazette over the period May 2006‐2007.Findings – The findings reveal that a multitude of skills and qualities are required in the profession. When the results were compared with Information National Training Organisation and Library and Information Management Employability Skills research, customer service, interpersonal and communication skills, and general computing skills emerged as the requirements most frequently sought by employers. Overall, requirements from the generic skills area were most important to employers, but the research also demonstra.
A New Scan Partition Scheme for Low‐Power Embedded Systems

A new scan partition architecture to reduce both the average and peak power dissipation during scan testing is proposed for low‐power embedded systems. In scan‐based testing, due to the extremely high switching activity during the scan shift operation, the power consumption increases considerably. In addition, the reduced correlation between consecutive test patterns may increase the power consumed during the capture cycle. In the proposed architecture, only a subset of scan cells is loaded with test stimulus and captured with test responses by freezing the remaining scan cells according to the spectrum of unspecified bits in the test cubes. To optimize the proposed process, a novel graph‐based heuristic to partition the scan chain into several segments and a technique to increase the number of don't cares in the given test set have been developed. Experimental results on large ISCAS89 benchmark circuits show that the proposed technique, compared to the traditional full scan scheme, can reduce both the average switching activities and the average peak switching activities by 92.37% and 41.21%, respectively.
Age related differences in learning to use a text-editing system

Abstract The increased use of computer technology in most occupations means that many middle-aged and older workers who lack computer experience will need to acquire skills to interact with this technology. This study examined age-group differences in learning to use a text-editing system. One hundred and thirty-five females ranging in age from 25 to 70 participated in the study. They received training under one of three training conditions: instructor-based, online or manual-based. Age differences were assessed by comparing performance on criterion tasks. Results indicated significant differences among the groups in learning success, younger learners being the most successful. There were no significant age by training interactions. The findings indicate a need to develop more effective training strategies to teach older learners to use computer technologies. They also indicate the need for changes in system design because computer applications are difficult for novice users to learn.