bluuebunny/crossref_metadata_2025_split huggingface dataset:
Public bookmarks and private benefits: An analysis of incentives in social computing
Authors: Wash Rick , Rader Emilee 
Published: February 2009

AbstractUsers of social computing websites are both producers and consumers of the information found on the site. This creates a novel problem for web‐based software applications: how can website designers induce users to produce information that is useful for others? We study this question by interviewing users of the social bookmarking website del.icio.us. We find that for the users in our sample, metadata reflecting who bookmarked a webpage better supports information seeking than free‐form keyword metadata (tags). We explain this finding by describing differences in the way that the design of del.icio.us motivates users to contribute by providing personal benefits for bookmarking and tagging.
Querying information systems or interacting with intermediaries? Towards understanding the informational capacity of online communities
Authors: Lueg Christopher P 
Published: February 2009

AbstractOnline communities have emerged as a topic of particular interest to information behavior researchers. When studying how information is shared and distributed in online communities we found that the informational capacity of online communities is not limited to providing specific information but may also include helping the information seeker understand (and often re‐conceptualize) his or her information needs. Conceptualizing the interactive processes we often observed as “mediated interaction” suggests to investigate the specific characteristics of these processes as well as to explore ways to enable and support respective interactions in online communities.
Fusion approach to finding opinionated blogs
Authors: Yang Kiduk , Yu Ning , Valerio Alejandro , Zhang Hui , Ke Weimao 
Published: February 2009

AbstractIn this paper, we describe a fusion approach to finding opinionated blog postings. Our approach to opinion blog retrieval consisted of first applying traditional IR methods to retrieve on‐topic blogs and then boosting the ranks of opinionated blogs based on combined opinion scores generated by multiple assessment methods. Our opinion module is composed of the Opinion Term Module, which identifies opinions based on the frequency of opinion terms (i.e., terms that occur frequently in opinion blogs), the Rare Term Module, which uses uncommon/rare terms (e.g., “sooo good”) for opinion classification, the IU Module, which uses IU (I and you) collocations, and the Adjective‐Verb Module, which uses computational linguistics' distribution similarity approach to learn the subjective language from training data.
Virtual community maintenance with a collaborative repository
Authors: Hansen Derek L. , Ackerman Mark S. , Resnick Paul J. , Munson Sean 
Published: February 2009

AbstractVirtual communities, like all communities, require ongoing community maintenance activities. This paper presents an empirical study examining how a wiki repository was used to help overcome some of the community maintenance challenges common to help‐based email list discussions. Specifically, we found that inclusion of off‐topic but related content on the wiki enabled list members to keep the discussion on‐topic while still addressing the needs of members. Offloading of repetitive and potentially contentious “holy war” debates to the wiki encouraged list members to summarize their arguments into a meaningful information product. The community's use of the wiki in helping answer frequently asked questions helped attract new members and helped them gain the knowledge they needed to comfortably contribute to the email list. It also helped active participants answer questions more efficiently and effectively by supporting the reuse of information. Finally, the wiki supported peripheral participation by new and former members. This study demonstrates that the architecture of information collections and information flows in an online community has a significant impact on the social processes related to community maintenance.
The loss of domain knowledge in user search queries: A query log analysis of a botanical retrieval system
Authors: Tang Xiaoya , Heidorn Bryan 
Published: February 2009

AbstractThis study analyzed the user search queries of an experiment conducted on a full‐text botanical retrieval system. Search terms were extracted and categorized. Term frequencies in each category were calculated. Search terms were compared with target documents. The results reveal preferences for the kinds of information used in search queries, that search queries and document representations use very different format and vocabulary, and that the domain knowledge used in user search queries is lost when such queries are interpreted by the system.
Tagging & utility: The effects of social tagging on a collaborative task
Authors: Mirzaee Vanesa , Iverson Lee , Khan Samia 
Published: February 2009

AbstractThis poster describes an experiment which is being carried out to investigate the effects of integrating a social tagging model into an existing work‐related/task‐oriented application; a Web 2.0 case study repository and cross‐case analysis application. In this study, we will focus on investigating the utility of the application as well as the users' behavioral patterns in an attempt to gain a better understanding of (1) how users utilize a tagging model to manage their personal and social information space, (2) the users' behavioral patterns as they classify, explore, retrieve, and share the information utilizing tagging models and how this differs from a non‐social tagging model, (3) the impact of a social tagging model in the quality of the work produced.
Revising place‐code schemes for humanitarian relief
Authors: Kemp Randall B. 
Published: February 2009

AbstractWhen clear communication about a location, such as a village name, is critical in times of humanitarian intervention, the use of place names can result in ambiguity. A place code system, on the other hand, has potential to reduce confusion and increase information sharing and coordination of relief efforts. This poster explores the possibilities of a place‐code scheme revision for humanitarian action.
Self‐representation of online identity in collected hyperlinks
Authors: Russell Terrell , Stutzman Frederic 
Published: February 2009

AbstractOnline identity is the representation of one's persona in a digital context. A primary factor in this representation is the collection of links that represent an individual in search. Designed by the authors, claimID (http://claimID.com) is a web service that enables individuals to use the hyperlinks about them to create a rich presentation of their online identity. In this paper, we analyze patterns of self‐representation of online identity as observed in claimID.
A systematic approach for the generation and verification of structural hypotheses
Authors: Elyashberg Mikhail , Blinov Kirill , Williams Antony 
Published: February 2009

AbstractDuring the process of molecular structure elucidation the selection of the most probable structural hypothesis may be based on chemical shift prediction. The prediction is carried out using either empirical or quantum‐mechanical (QM) methods. When QM methods are used, NMR prediction commonly utilizes the GIAO option of the DFT approximation. In this approach the structural hypotheses are expected to be investigated by scientist. In this article we hope to show that the most rational manner by which to create structural hypotheses is actually by the application of an expert system capable of deducing all potential structures consistent with the experimental spectral data and specifically using 2D NMR data. When an expert system is used the best structure(s) can be distinguished using chemical shift prediction, which is best performed either by an incremental or neural net algorithm. The time‐consuming QM calculations can then be applied, if necessary, to one or more of the ‘best’ structures to confirm the suggested solution. Copyright © 2009 John Wiley & Sons, Ltd.
Correlates of peer victimization and achievement: An exploratory model
Authors: Beran Tanya 
Published: February 2009

AbstractThis study investigates peer victimization and achievement. Adolescents aged 12–15 years were drawn from the National Longitudinal Survey of Children and Youth, which is a stratified random sample of 22,831 households in Canada. Teachers', children's, and parents' reports were combined in a latent variable path analysis, χ2(51) = 348.54, p < .000. The model converged in six iterations resulting in a Comparative Fit Index = .90, and a standardized residual mean error of .05. The model shows that adolescents who are victimized by their peers are at risk of experiencing poor school achievement if they exhibit disruptive behaviors, receive little support from their teachers, and experience non‐nurturing, rejecting behaviors from their parents. © 2009 Wiley Periodicals, Inc.
Combined and progestogen‐only oral contraception
Authors: MacGregor Anne 
Published: February 2009

AbstractHealth professionals are now faced with helping women choose from a wide range of different combined and progestogen‐only oral contraceptives, each with their advantages and disadvantages. Our Drug Review considers their efficacy and associated benefits and risks, followed by sources of useful information in Resources and the Datafile. Copyright © 2006 Wiley Interface Ltd
The theory of material flow substance
Authors: Song Bohui , Xu Shoubo 
Published: February 2009

AbstractIn this paper, we put forward the theory of material flow (MF) substance for the first time based on the MF Theory. We consider that that MF is a comprehensive body of substances; and transportation, storing, LUH (loading, unloading and handling) and distribution processing are the four independent links of MF substance. Transportation, storing and LUH are the three indispensable links; of which, transportation and storing are the core links and LUH is the auxiliary link. Distribution processing is the expanded link of MF substance. Copyright © 2009 John Wiley & Sons, Ltd.
Intraobserver and interobserver reliability of automated antral follicle counts made using three‐dimensional ultrasound and SonoAVC
Authors: Deb S. , Jayaprakasan K. , Campbell B. K. , Clewes J. S. , Johnson I. R. , Raine‐Fenning N. J. 
Published: February 2009

AbstractObjectiveTo assess the reliability of automated measurements of the total antral follicle count (AFC) made using Sono‐Automatic Volume Count (SonoAVC), and to compare these to two‐dimensional (2D) and manual three‐dimensional (3D) techniques.MethodsFifty‐five subjects aged under 40 years who had 3D transvaginal ultrasound examination in the early follicular phase of their menstrual cycle were prospectively recruited. 3D datasets were acquired and subsequently analyzed. The total AFC (2–10 mm antral follicles) was calculated by two observers using three independent methods: 2D real‐time equivalent (2D‐RTE), 3D manual multiplanar view (3D‐MPV), and SonoAVC. For measurements made using SonoAVC, the initial automated count (sAVC‐AA) was recorded and postprocessing (sAVC‐PP) then applied to identify follicles that had been missed or incorrectly included. Intraclass correlation and limits of agreement were used to evaluate the methods.ResultsThe intra‐ and interobserver reliability of measurements of total AFC was best with SonoAVC with postprocessing followed by 3D‐MPV and 2D‐RTE. The initial count calculated by sAVC‐AA missed follicles and this was reflected in the significantly lower mean total AFC (6.51 ± 4.79) than that made after postprocessing techniques (sAVC‐PP, 18.42 ± 10.53, P < 0.001; 3D‐MPV, 19.38 ± 10.85, P < 0.001; and 2D‐RTE, 19.26 ± 10.55, P < 0.001). The mean total AFC became more comparable with postprocessing (sAVC‐PP) but still remained significantly lower than counts made with 2D‐RTE and 3D‐MPV (P < 0.05).ConclusionSonoAVC with postprocessing is a reliable method for measuring total AFC. It takes longer to perform, because of the need for postprocessing, and obtains values that are lower than those obtained by the 2D and 3D‐MPV techniques. However, the AFC obtained by sAVC‐PP is likely to be lower because this method measures and color codes each follicle preventing recounting. Copyright © 2009 ISUOG. Published by John Wiley & Sons, Ltd.
Room‐Temperature Synthesis of Bismuth Clusters in Ionic Liquids and Crystal Growth of Bi5(AlCl4)3
Authors: Ahmed Ejaz , Köhler Daniel , Ruck Michael 
Published: February 2009

AbstractThe viability of Lewis‐acid ionic liquids for the synthesis of low‐valent bismuth compounds is demonstrated. At room temperature, elemental bismuth and bismuth(III) cations synproportionate in the ionic liquid [BMIM]Cl/AlCl3 ([BMIM]+: 1‐n‐butyl‐3‐methylimidazolium) within minutes. The existence of bismuth polycations in the dark colored solution was proven by Raman spectroscopy. Dark‐red crystals of Bi5(AlCl4)3 were isolated from the ionic liquid and characterized by Raman spectroscopy and X‐ray crystallography (rhombohedral space‐group $R{\bar 3}c$, a = 1187.1(2) pm, c = 3012.0(3) pm). The method allows the synthesis of bismuth cluster compounds under milder conditions than in high‐temperature melts and more conveniently and environmental friendly than in liquid SO2 with strongly oxidizing, toxic agents like SbF5 or AsF5.
Iron and Nickel Complexes Containing β‐Diketiminato Ligands with Thioether Tethers
Authors: Pfirrmann Stefan , Limberg Christian , Hoppe Elke 
Published: February 2009

AbstractA novel β‐diketiminato ligand precursor, LH (II), containing thioether tethers was synthesized by the reaction of acetylacetone and 2‐methylthioaniline. II was deprotonated and used in the synthesis of two iron(II) complexes, [LFeCl] (1), and [LFeOTf] (2), and one nickel(II) complex, [LNiBr] (3). All three compounds were characterized by means of single crystal X‐ray diffraction and their structures are discussed.
Synthesis and Structural Characterization of Ternary Compounds Belonging to the Series RE2+mNi4+mAl15+4m (RE = rare earth metal)
Authors: Delsante Simona , Richter Klaus W. , Ipser Herbert , Borzone Gabriella 
Published: February 2009

AbstractThe investigation of selected alloys in the Al‐rich part of ten RE‐Ni‐Al systems (RE = rare earth metal) has proved the existence of eight new ternary compounds: five with stoichiometry “R4Ni6Al23” (mC66‐Y4Ni6Al23‐type, for RE = Pr, Nd, Tb, Dy, Ho) and three with stoichiometry “R3Ni5Al19” (oC108‐Gd3Ni5Al19‐type, for RE = Sm, Dy and Er). In addition, the existence of R4Ni6Al23 (RE = Ce and Gd) and of Gd3Ni5Al19 has been confirmed. Lattice parameters have been determined and compared with those previously reported in literature. The samples have been synthesized from pure elements by induction melting, annealed at 800 °C and then water quenched. Micrographic characterization was carried out using a light optical microscope (LOM) and a scanning electron microscope (SEM). The structural characterization was performed by X‐ray powder diffraction.
Synthese und Kristallstrukturen von 1,1,3,3‐Tetramethylimidazolinium‐dichlorid und 1,1,4‐Trimethylpiperazinium‐chlorid
Authors: Massa Werner , Dehnicke Kurt 
Published: February 2009

AbstractSynthesis and Crystal Structures of 1,1,3,3‐Tetramethylimidazolinium Dichloride and 1,1,4‐Trimethylpiperazinium ChlorideSingle crystals of 1,1,3,3‐tetramethylimidazolinium dichloride (1) and 1,1,4‐trimethylpiperazinium chloride (2) were obtained by reaction of CH2Cl2 with tetramethylethylenediamine (TMEDA) and NNN′N″N″‐pentamethyldiethylenetriamine (PMDETA), respectively. Both compounds are characterized by single crystal X‐ray diffraction and by IR spectroscopy.1: [C7H18N2]Cl2, space group P21/c, Z = 4, lattice dimensions at 193(2) K: a = 821.97(11), b = 1130.38(8), c = 1143.08(13) pm, β = 100.348(15)°, R1 = 0.0271. The C7N2 heterocyclic ring has envelope conformation like other salts with this dication.2: [C7H17N2]Cl, space group P212121, Z = 4, lattice dimensions at 100(2) K: a = 1030.37(8), b = 1036.55(6), c = 831.39(4) pm, R1 = 0.0180. Although the heterocyclic mono‐cation is without site symmetry in the crystal, its molecular symmetry is close to Cs, forming chair conformation of the C4N2 six‐membered ring.
The Structure of Cu6Sn5‐xSbx – Large Effects of Subtle Doping
Authors: Lidin Sven , Piao Shu‐Ying 
Published: February 2009

Abstract~Small amounts of antimony shifts the thermal stability range of ht‐Cu6Sn5. To make this phase stable at room temperature, and easily accessible by prolonged annealing, a model previously suggested for the ht‐phase is shown to be entirely correct in this single crystal study.
Outcome of the Rhomboid Flap for Recurrent Pilonidal Disease
Authors: el‐Khadrawy Osama , Hashish Mohamed , Ismail Khaled , Shalaby Helmy 
Published: February 2009

AbstractBackgroundPilonidal sinus is a common chronic disease of the sacrococcygeal region. Treatment varies according to the clinical presentation of the disease. Although many surgical methods have been suggested, an ideal method is still lacking because of high recurrence rates. Recurrent disease causes significant morbidity, particularly missing time from work. The aim of this study was to assess the rhomboid flap’s role in promoting primary healing in recurrent pilonidal disease and to evaluate morbidity and recurrence.MethodsThis prospective study included 60 patients who were treated with the use of a rhomboid flap closure for recurrent sacrococcygeal pilonidal sinus at Tanta University Hospital, Egypt, from January 2000 to October 2006. The follow‐up period ranged from 6 months to 7 years, with the mean follow‐up period about 2.5 years.ResultsThere were 46 males and 14 females with a median age of 18 years (range = 16–38 years). The mean hospital stay was 6 days (range = 5–11 days). Four patients had to be hospitalized for 1–2 weeks due to superficial wound infection; they recovered with injected antibiotics. The mean time to return to work after discharge from the hospital was 15 days (range = 12–26 days). Postoperative morbidity involved superficial wound infection in 9 patients (15%). There were six recurrences (10%). Eleven patients (18.3%) had numbness over the flap and 12 patients (20%) were not pleased with the cosmetic appearance of the scars.ConclusionsOur study favors the rhomboid flap for recurrent sacrococcygeal pilonidal sinus, especially for complex sinuses, and found it suitable for cases where simpler operations have failed. It allows early return to full activity, does not necessitate prolonged postoperative care, and has very low recurrence and complications rates which may outweigh the disadvantages related to an unfavorable cosmetic appearance.
Fiber tracking of white matter integrity connecting the mediodorsal nucleus of the thalamus and the prefrontal cortex in schizophrenia: A diffusion tensor imaging study
Authors: Kito Shinsuke , Jung Jiuk , Kobayashi Tetsuo , Koga Yoshihiko 
Published: February 2009

AbstractThe goal of this study was to detect abnormalities in white matter integrity connecting the mediodorsal nucleus of the thalamus and the prefrontal cortex using fiber-tracking technique. Diffusion tensor imaging was acquired in 20 patients with schizophrenia and 20 normal comparison subjects. Fiber tracking was performed on the anterior thalamic peduncle, and the tractography was used to determine the cross-sectional area, mean fractional anisotropy, and standard deviation of fractional anisotropy for every step separately in the right and left hemispheres. Compared with normal subjects, patients showed a significant reduction in the cross-sectional area of the left anterior thalamic peduncle. There were no significant differences for the mean fractional anisotropy bilaterally between the two groups, but significant differences for the standard deviation of fractional anisotropy in both hemispheres. Reduction in the cross-sectional area of the left anterior thalamic peduncle suggests the presence of the failure of left-hemisphere lateralization. In schizophrenic patients a significant increase of the standard deviation of fractional anisotropy raise the possibility that the inhomogeneity of white matter integrity, which is densely or sparsely distributed by site. These findings might provide further evidence for disruption of white matter integrity between the thalamus and the prefrontal cortex in schizophrenia.
Role of genetic polymorphisms and ovarian cancer susceptibility
Authors: Fasching Peter A. , Gayther Simon , Pearce Leigh , Schildkraut Joellen M. , Goode Ellen , Thiel Falk , Chenevix-Trench Georgia , Chang-Claude Jenny , Wang-Gohrke Shan , Ramus Susan , Pharoah Paul , Berchuck Andrew 
Published: February 2009

The value of identifying women with an inherited predisposition to epithelial ovarian cancer has become readily apparent with the identification of the BRCA1, and BRCA2 genes. Women who inherit a deleterious mutation in either of these genes have a very high lifetime risk of ovarian cancer (10–60%) and to some extent, increased risks of fallopian tube and peritoneal cancer. These highly lethal cancers are almost completely prevented by prophylactic salpingoophorectomy. BRCA1/2 mutation testing has become the accepted standard of care in families with a strong history of breast and/or ovarian cancer. This approach has the potential to reduce ovarian cancer mortality by about 10%.Although the ability to perform genetic testing for BRCA1 and 2 represents a significant clinical advance, the frequency of mutations in these high penetrance ovarian cancer susceptibility genes is low in most populations. There is evidence to suggest that ovarian cancer susceptibility might be affected by common low penetrance genetic polymorphisms like it was shown for several common disorders like diabetes or breast cancer. Although such polymorphisms would increase risk to a lesser degree, they could contribute to the development of a greater proportion of ovarian cancers by virtue of their higher frequencies in the population. It has been shown that the most powerful approach to studying low penetrance genes is an association study rather than a linkage study design. This review describes the efforts that have been made in this field by individual case–control studies and through multi‐center collaborations as part of international consortia such as the Ovarian Cancer Association Consortium (OCAC).
The Mss. of Callimachvs' Hymns
Authors: Smiley M. T. 
Published: February 2009

Thus far, discarding such manuscripts as are copies of printed editions, we have arrived at the following grouping:1. The group x (= ABCK), in which K is a copy of A, and B of C, while A and C are brothers, the former being only slightly superior to the latter.2. SQq. Here Q is a copy of S, whose borrowings from Politian it incorporated. Q added some readings from C or K, and scholia and other readings from a manuscript of the Ee stock; and after Q had received these additions, q was in turn copied from Q.3. IID. Mr. Allen thinks it possible that, for the Homeric Hymns, these two are not direct copies of the same manuscript; and his conclusions may be accepted as indicating their mutual kinship in regard to Callimachus also. D's lost Callimachean portion gave some readings to Politian's text of Hymn V., and is in part represented by J. Lascaris' editio princeps of all six Hymns.4.Ee, found to be brothers.5. The group z (= FAtGHAIBr). Here At appears to be a brother of F; and F stands apart from the z2 section ( = GHAIBr), being nearer than they to xSTLDEe. Among the z2 manuscripts, Br is a copy of I, which is itself separated from GHA; this trio seem, on the imperfect evidence at hand, to be brothers.