bluuebunny/crossref_metadata_2025_split huggingface dataset:
Working Memory Capacity and Learning Underlying Conceptual Relationships Across Multiple Documents
Authors: Banas Steven , Sanchez Christopher A. 
Published: February 2012

SummaryA common usage of textual repositories of information is to seek out and gather important information for a specific learning goal. However, not all material is organized in a single location, and users are often forced to visit multiple pages or sources to develop understanding. In these situations, are different learners more or less sensitive to drawing the underlying connections between multiple documents, which are relevant for the eventual learning goals? This study examines the performance of undergraduates who vary in working memory capacity as they were asked to learn about plants from a Wiki‐like website. Participants were pretested on their knowledge of both biology and the plant kingdom. Results indicate that learning underlying conceptual structure is indeed predicted by working memory, but not prior knowledge. This suggests that individual characteristics should be considered when designing learning technologies in the future. Copyright © 2012 John Wiley & Sons, Ltd.
Adaptive control of stochastic nonlinear systems with Markovian switching
Authors: Wang G.L. , Zhang Q.L. 
Published: February 2012

SUMMARYThis paper is concerned with the problem of adaptive control for a class of stochastic nonlinear systems with Markovian switching, where the upper bounds of nonlinearities of stochastic Markovian jump systems are assumed to be unknown. Firstly, an adaptation law is developed to estimate these unknown parameters. Then, a class of adaptive state feedback controller is proposed such that not only the estimated errors are bounded almost surely but also, the states of the resulting closed‐loop system are asymptotically stable almost surely. Finally, a numerical example is given to show the validity of the results.Copyright © 2012 John Wiley & Sons, Ltd.
Self‐tuning weighted fusion Kalman filter for ARMA signal with colored measurement noise and its convergence analysis
Authors: Liu Jinfang , Deng Zili 
Published: February 2012

SUMMARYFor the multisensor single‐channel autoregressive moving average (ARMA) signal with colored measurement noise, when the partial model parameters and the noise variance are unknown, a self‐tuning fusion Kalman filter weighted by scalar is presented based on the ARMA innovation model by the modern time series analysis method. With the application of the recursive instrumental variable algorithm and the Gevers–Wouters iterative algorithm with dead band, the information fusion estimators for the unknown model parameters and noise variance are obtained, and their consistence is proved by the existence and continuity theorem of implicit function. Then, substituting them into the optimal weighted fusion Kalman filter, one can obtain the corresponding self‐tuning weighted fusion Kalman filter. Further, with the application of the dynamic variance error system analysis method, the convergence of the self‐tuning Lyapunov equations for filtering error cross‐covariances is proved. With the application of the dynamic error system analysis method, it is rigorously proved that the self‐tuning weighted fusion Kalman filter converges to the optimal weighted fusion Kalman filter in a realization; that is, it has asymptotic optimality. A simulation example shows its effectiveness.Copyright © 2012 John Wiley & Sons, Ltd.
Synthesis of Phase‐Pure Ferromagnetic Fe3P Films from Single‐Source Molecular Precursors
Authors: Colson Adam C. , Chen Chih‐Wei , Morosan Emilia , Whitmire Kenton H. 
Published: February 2012

AbstractA new method for the preparation of phase‐pure ferromagnetic Fe3P films on quartz substrates is reported. This approach utilizes the thermal decomposition of the single‐source precursors H2Fe3(CO)9PR (R = tBu or Ph) at 400 °C. The films are deposited using a simple, home‐built metal‐organic chemical vapor deposition (MOCVD) apparatus and are characterized using a variety of analytical methods. The films exhibit excellent phase purity, as evidenced by X‐ray diffraction, X‐ray photoelectron spectroscopy, and field‐dependent magnetization measurements, the results of which agree well with measurements obtained from bulk Fe3P. Using scanning electron microscopy and atomic force microscopy techniques, the films are found to have thicknesses between 350 and 500 nm with a granular surface texture. As‐deposited Fe3P films are amorphous, and little or no magnetic hysteresis is observed in plots of magnetization versus applied field. Annealing the Fe3P films at 550 °C results in improved crystallinity as well as the observation of magnetic hysteresis.
Applying Brain Emotional Learning Based Intelligent Controller (Belbic) to Multiple‐Area Power Systems
Authors: Ale Aghaee Shirin , Lucas Caro , Amiri Zadeh Khosrow 
Published: February 2012

AbstractEvolution of efficient power system control is very important. An effective power system simulation is useful for development as an evaluation of control performance. In this paper, a new, efficient simulation of multiple‐area power system control is proposed. We present the application of a Brain Emotional Learning Based Intelligent Controller (BELBIC) to regulate the frequency error for a two‐area interconnected power system. BELBIC is based on the emotional learning process in the Amygdala‐Orbitofrontal system of the mammalian brain. Simulation results of this controller and the PID controller for a two‐area power system in a matlab/simulink environment show that it develops the stability control performance and improves amplitude of oscillations and settling time up to 17% and 24%, respectively. Actually, the simulation shows that the proposed BELBIC model for the matlab/simulink environment works and gives acceptable results, without redesigning it for each separate system.
Occupational exposure to electric fields and currents associated with 110 kv substation tasks
Authors: Korpinen Leena H. , Kuisti Harri A. , Tarao Hiroo , Elovaara Jarmo A. 
Published: February 2012

AbstractThe main aim of this study was to investigate occupational exposure to electric fields, and current densities and contact currents associated with tasks at air‐insulated 110 kV substations and analyze if the action value of EU Directive 2004/40/EC was exceeded. Four workers volunteered to simulate the following tasks: Task (A) maintenance of an operating device of a disconnector at ground or floor level, Task (B) maintenance of an operating device of a circuit breaker at ground or floor level, Task (C) breaker head maintenance from a man hoist, and Task (D) maintenance of an operating device of a circuit breaker from a service platform. The highest maximum average current density in the neck was 1.8 mA/m2 (calculated internal electric field 9.0–18.0 mV/m) and the highest contact current was 79.4 µA. All measured values at substations were lower than the limit value (10 mA/m2) of the EU Directive 2004/40/EC and the 2010 basic restrictions (0.1 and 0.8 V/m for central nervous system tissues of the head, and all tissues of the head and body, respectively) of the International Commission on Non‐Ionizing Radiation Protection (ICNIRP). Bioelectromagnetics 33:438–442, 2012. © 2012 Wiley Periodicals, Inc.
Laying out ground rules for protein‐aided nanofabrication: ZnO synthesis at 70°C as a case study
Authors: Kitayaporn Sathana , Zhou Weibin , Schwartz Daniel T. , Baneyx François 
Published: February 2012

AbstractDesigner proteins that incorporate solid‐binding peptides hold promise to control the nucleation, growth, morphology, and assembly of inorganic phases under mild conditions of temperature and pressure. However, protein‐aided nanofabrication remains more art than science and some materials can only be synthesized at temperatures that cause most mesophilic proteins to unfold. Using zinc oxide (ZnO) synthesis at 70°C as case study, we show here that seemingly unimportant variables, such as the carry‐over concentration of Tris buffer and the “empty” host protein scaffold can exert a significant influence on materials morphology. We also show that, once well‐controlled conditions are established, thermodynamic predictions and adsorption isotherms are powerful tools to understand how various ZnO‐binding sequence inserted within the thermostable framework of Escherichia coli thioredoxin A (TrxA) affect inorganic morphogenesis. Biotechnol. Bioeng. 2012; 109:1912–1918. © 2012 Wiley Periodicals, Inc.
President's page
Authors: Sonnenwald Diane H. 
Published: February 2012

AbstractEditor's SummaryASIS&T president Diane Sonnenwald marks the start of 2012 by applauding the many ways the organization is helping the membership stay current with industry trends. Members are volunteering to promote the organization on numerous fronts, from Facebook to webinars to planning and volunteer recruitment for the 2012 Annual Meeting in Baltimore. ASIS&T membership renewals have been simplified with conditionally lower rates, including special rates for members in less developed countries, and there are proposals for holding future meetings in countries outside North America. Volunteers and headquarters staff work collaboratively on many aspects of meeting planning through the year and the variety of other activities that keep ASIS&T a vibrant organization. Members are encouraged to renew their memberships, take advantage of offerings, participate actively in the organization and provide their support as volunteers.
ASIS&T 2011 plenary session: Preservation: The final frontier
Authors: Hardin Steve 
Published: February 2012

AbstractEditor's SummaryTom Wilson, professor emeritus at the University of Sheffield, explored the perils and challenges of information preservation in a talk at the 2011 Annual Meeting. Wilson described 2011 technology as quaint from a future perspective and retraced the evolution of known document formats from cave painting and papyrus through clay, wood, paper, microfilm, laser discs and today's variety of digital record formats. Not only is the continuing evolution in formats a challenge in itself, but the content of bygone eras may not be comprehensible to those who follow. Decisions about what to preserve come into play, involving judgments at a point in time that may not be the same from a different temporal viewpoint. These issues, together with migration through versions of hardware and software, suggest keeping lots of copies in safe places, leading to impossibly huge amounts of data to store indefinitely. Wilson mused that reverting to paper, following digital librarian Brewster Kahle's lead, might be our best option.
A haystack full of needles: Scholarly access challenges in museum video archives
Authors: Nodler Heather 
Published: February 2012

AbstractEditor's SummaryMuseums are increasingly turning to video as an easy and inexpensive method of documentation and of developing valuable primary resources, but numerous barriers interfere with scholars' use of the materials. While technical difficulties are diminishing and attitudes and traditions are shifting, issues of intellectual property rights and information retrieval remain. Publishing video content online first demands a comprehensive rights assessment and clearing. Even more challenging is dealing with information retrieval in time‐based and visual‐aural resources, which makes finding a specific bit of data in mounds of footage a daunting task. Transcription enables free text search but is costly, time consuming and not entirely effective, delivering only the verbal aspect of original content. Descriptive metadata can be tied to time codes, adding broad or granular indexing to support navigation and retrieval, but the same drawbacks apply. Possible solutions include crowdsourcing, software tools and collaborative initiatives, applying metadata standards yet to be established and adopted.
Advanced imaging tools for museum and library conservation and research
Authors: Schroer Carla 
Published: February 2012

AbstractEditor's SummaryMuseum objects are being presented in a new and informative light through reflectance transformation imaging (RTI). This photographic method provides detailed images of an object's shape, color attributes and surface texture along with illumination from different angles, showing details that are often unavailable with the naked eye. Beyond revealing brushstroke details and surface impressions, the RTI technique can be used under a microscope and enhanced with infrared or ultraviolet light, broadening its utility for museum professionals, archaeologists and historians. Associated software records the series of images as a digital lab notebook. RTI is part of the emerging field of computational photography, extracting data from a sequence of digital photographs and synthesizing a new representation holding previously unrecognized information, while protecting the original resource. The digital representations of fine art and natural science museum objects afforded by this new technology facilitate cooperation among museum professionals across disciplines and around the world.
OpenART: Open metadata for art research at the tate
Authors: Allinson Julie 
Published: February 2012

AbstractEditor's SummaryThe short‐term OpenART project was geared to exposing linked open data for the research dataset, “The London Artworld 1660‐1735,” of the Tate Britain art gallery, enabling viewers to learn about activities in the art world of the times. Work for the project required decisions and choices about using open data, starting with considering use cases and identifying entities and relationships. The dataset was modeled and expressed in the Resource Description Framework, using an event – art sales – as the central component of the model. An OpenART ontology was developed to provide domain‐specific descriptors and integrated with existing ontologies to provide semantic interoperability. The resulting event‐based ontology supported reciprocal statements about entities revolving around an event, as well as references back to other types of information for greater detail. Data was transformed from spreadsheets to RDF documents, served to a data repository and provided with persistent URLs. The OpenART project demonstrated practical approaches to exposing linked open data while enabling sharing and creative reuse of the research data.
Teens, virtual environments and information literacy
Authors: Beheshti Jamshid 
Published: February 2012

AbstractEditor's SummaryAs digital natives, the vast majority of teens are used to cellphones, text messaging, social networking sites and other forms of electronic communications and technologies. Though rooted in the digital world for many of their daily activities, teens lack basic information literacy skills for academic tasks and other demands. Specific instruction through the educational system may not be feasible, but it may be possible to build teens' information competence through interactive virtual learning environments. Game‐style virtual environments are highly motivating and engaging, providing opportunities for repeated practice and reward for persistence and achieving goals. A virtual reality library, VRLibrary, was constructed, collaboratively designed by young teens and adults, based on the metaphor of a physical library. Teens could wander the virtual space and browse links to age‐appropriate websites presented as virtual books. VRLibrary was very positively received and succeeded at engaging teen users. A librarian avatar could be incorporated to provide help as needed with a user's information seeking.
Comparison of the predictive value of EuroSCORE, SYNTAX score, and clinical SYNTAX score for outcomes of patients undergoing percutaneous coronary intervention for unprotected left main coronary artery disease
Authors: Jou Yu‐Lan , Lu Tse‐Min , Chen Ying‐Hwa , Sung Shih‐Hsien , Wang Kang‐Ling , Huang Shao‐Sung , Lin Wan‐Ting , Chan Wan‐Leong , Lin Shing‐Jong 
Published: February 2012

AbstractObjectives: We aimed to assess the prognostic values of the EuroSCORE, SYNTAX score, and the novel Clinical SYNTAX score (CSS) for 30‐day and 1‐year outcomes in patients undergoing left main (LM) percutaneous coronary intervention (PCI). Background: PCI has become an alternative treatment for LM coronary artery disease, and risk scoring system might be beneficial for pre‐PCI risk stratification. Methods and Results: We enrolled 198 consecutive patients with unprotected LM disease undergoing PCI (mean age 71.5 ± 10.7 years). The CSS was calculated by multiplying the SYNTAX Score to (age/left ventricular ejection fraction +1 for each 10 mL the estimated glomerular filtration rate <60 mL/min per 1.73 m2). The endpoints were 30‐day, and 1‐year all‐cause death and major adverse cardiovascular events (MACE), which were defined as all‐cause death, nonfatal MI, and clinical‐driven target vessel revascularization. Comparing with the SYNTAX score, the predictive accuracy of CSS for 30‐day and 1‐year all‐cause death and MACE were significantly higher (c‐statistics, CSS versus SYNTAX score: P < 0.01 for 30‐day and 1‐year all‐cause death; P < 0.05 for 30‐day and 1‐year MACE, respectively). Furthermore, in the multivariate Cox regression analysis, both EuroSCORE and CSS were identified as the independent predictors of 30‐day and 1‐year all‐cause death and MACE, but the SYNTAX score was not. Conclusions: In the general practice among a high‐risk population undergoing LM PCI, EuroSCORE and CSS might be independent predictors for 30‐day and 1‐year all‐cause death and MACE. Furthermore, the CSS had a superior discriminatory ability in predicting the 30‐day and 1‐year clinical outcomes comparing with the SYNTAX score. © 2012 Wiley Periodicals, Inc.
A randomized study comparing the effectiveness of right and left radial approach for coronary angiography
Authors: Norgaz Tugrul , Gorgulu Sevket , Dagdelen Sinan 
Published: February 2012

AbstractObjectivesOur aim was to compare the effectiveness between right radial approach (RRA) and left radial approach (LRA) by means of a randomized study in a large unselected patient population undergoing diagnostic coronary angiography.MethodsTotally, 1,000 patients were randomized to undergo to RRA (n = 500) or LRA (n = 500). Procedure success was defined as coronary angiography completed with the initial radial artery approach without changing to another route. Performance of the procedure: Total procedural duration, the number of catheters and guidewires used were recorded. Safety of the procedure: The parameters collected for radiation exposure were dose area product (DAP) and fluoroscopy time.ResultsThe percentage of success was not different between the two aproaches (LRA, 94.0%; RRA,93.8%; P = 0.96). The crossover rate to femoral was low, accounting for 38 cases (3.8%), without differences between RRA and LRA (20 and 18 cases, respectively, P > 0.05). An almost triple incidence of operator‐reported subclavian tortuosity in the RRA compared with LRA was observed (44 cases vs. 15 cases, P < 0.001). With respect to the total procedural duration there was no difference between those two aproaches (LRA, 8.54 ± 4.09 min vs. RRA, 8.63 ± 5.20; P = 0.772). However, the fluoroscopy time was significantly shorter via the LRA compared with RRA (2.76 ± 2.00 min vs. 3.08 ± 2.62 min; P = 0.029).ConclusionsLRA for coronary angiography is associated with the same success rate and procedural duration time compared with RRA. However, the fluoroscopy time is significantly shorter in favor of LRA. © 2012 Wiley Periodicals, Inc.
Synthesis, Characterization, and Spectroscopic Analysis of Antiaromatic Benzofused Metalloporphyrins
Authors: Sugawara Shun , Hirata Yusuke , Kojima Satoshi , Yamamoto Yohsuke , Miyazaki Eigo , Takimiya Kazuo , Matsukawa Shiro , Hashizume Daisuke , Mack John , Kobayashi Nagao , Fu Zhen , Kadish Karl M. , Sung Young Mo , Kim Kil Suk , Kim Dongho 
Published: February 2012

AbstractA two‐electron oxidation of the CuII (9) and ZnII (12) complexes of tetraphenyltetrabenzoporphyrin (TPTBP) results in the formation of stable antiaromatic [(TPTBP)CuII(H2O)]2+⋅2 [SbF6]− (10) and [(TPTBP)ZnII(H2O)2]2+⋅2 [SbF6]− (13) with 16π electrons on the inner ligand perimeter. X‐ray structures of the parent TPTBP complexes, the dications, and singly oxidized species [(TPTBP)CuII]⋅+[SbF6]− (11) reveal that the use of TPTBP rather than a porphyrin ligand reduces the degree of nonplanarity in the 16π‐electron species relative to the parent 18π complex. Significant high‐field shifts of the 1H NMR signals of the outer ring protons and large positive values in calculations of nucleus‐independent chemical shifts on the central cavity of the porphyrin ring provide unambiguous evidence for the antiaromatic character of the 16π ZnII species. A combination of magnetic circular dichroism spectroscopic studies and TD‐DFT calculations on both the ZnII and CuII species demonstrates that the main electronic bands of the dicationic species can be readily assigned by using Michl’s 4N perimeter model. Femtosecond transient absorption studies clearly demonstrated that the number of π electrons on the inner ligand perimeter and the configuration of the central metal ion play a critical role in the excited‐state relaxation dynamics. Redox potentials for conversion between the 16π, 17π, and 18π systems were measured by cyclic voltammetry in dichloromethane and benzonitrile, and UV/Vis spectra of each oxidation/reduction product were monitored by thin‐layer spectroelectrochemistry.
Photoprotection and the Photophysics of Acylated Anthocyanins
Authors: Ferreira da Silva Palmira , Paulo Luísa , Barbafina Arianna , Elisei Fausto , Quina Frank H. , Maçanita António L. 
Published: February 2012

AbstractThe proposed role of anthocyanins in protecting plants against excess solar radiation is consistent with the occurrence of ultrafast (5–25 ps) excited‐state proton transfer as the major de‐excitation pathway of these molecules. However, because natural anthocyanins absorb mainly in the visible region of the spectra, with only a narrow absorption band in the UV‐B region, this highly efficient deactivation mechanism would essentially only protect the plant from visible light. On the other hand, ground‐state charge‐transfer complexes of anthocyanins with naturally occurring electron‐donor co‐pigments, such as hydroxylated flavones, flavonoids, and hydroxycinnamic or benzoic acids, do exhibit high UV‐B absorptivities that complement that of the anthocyanins. In this work, we report a comparative study of the photophysics of the naturally occurring anthocyanin cyanin, intermolecular cyanin–coumaric acid complexes, and an acylated anthocyanin, that is, cyanin with a pendant coumaric ester co‐pigment. Both inter‐ and intramolecular anthocyanin–co‐pigment complexes are shown to have ultrafast energy dissipation pathways comparable to those of model flavylium cation–co‐pigment complexes. However, from the standpoint of photoprotection, the results indicate that the covalent attachment of co‐pigment molecules to the anthocyanin represents a much more efficient strategy by providing the plant with significant UV‐B absorption capacity and at the same time coupling this absorption to efficient energy dissipation pathways (ultrafast internal conversion of the complexed form and fast energy transfer from the excited co‐pigment to the anthocyanin followed by adiabatic proton transfer) that avoid net photochemical damage.