bluuebunny/crossref_metadata_2025_split huggingface dataset:
A robust estimation approach for uncertain systems with perturbed measurements
Authors: Bolajraf Mohamed , Ait Rami Mustapha 
Published: April 2015

SummaryThis paper deals with state estimation problem for uncertain continuous‐time systems. A numerical treatment is proposed for designing interval observers that ensures guaranteed upper and lower bounds on the estimated states. In order to take into account possible perturbations on the system and its outputs, a new type of interval observers is introduced. Such interval observers consist of two coupled general Luenberger‐type observers that involve dilatation functions. In addition, we provide an optimality criterion in order to find optimal interval observers that lead to tight interval error estimation. The proposed existence and optimality conditions are expressed in terms of linear programming. Also, some illustrative examples are given. Copyright © 2015 John Wiley & Sons, Ltd.
Future trends in broadband satellite communications: information centric networks and enabling technologies
Authors: Cola Tomaso De , Tarchi Daniele , Vanelli‐Coralli Alessandro 
Published: April 2015

SummaryThe ever‐increasing demand for multimedia services from fixed and mobile users has motivated the scientific community, industries, and standardization fora to rethink the communication paradigm and the protocol architectures, resulting in an overall revolution of the Internet technologies. As satellite will play a pivotal role in this picture to exploit its broadcast and broadband capabilities; technical challenges come up in the integration of satellite and terrestrial networks. New paradigms based on the recent Future Internet studies findings have to be also applied to the satellite communications domain, with consequent implications on the design of the physical layer, in order for the satellite capacity to accommodate all of the offered services. This paper explores the various challenges arising during this process and draws a new concept of broadband satellite systems, tailored to the needs of fixed and mobile users. Copyright © 2015 John Wiley & Sons, Ltd.
Development and validation of a tool incorporating cervical length and quantitative fetal fibronectin to predict spontaneous preterm birth in asymptomatic high‐risk women
Authors: Kuhrt K. , Smout E. , Hezelgrave N. , Seed P. T. , Carter J. , Shennan A. H. 
Published: April 2015

ABSTRACTObjectiveTo develop a predictive tool for spontaneous preterm birth (sPTB) in asymptomatic high‐risk women that includes quantification of fetal fibronectin (fFN) along with cervical length (CL) measurement and other clinical factors.MethodsData were analyzed that had been collected prospectively from 1249 women at high risk for sPTB attending preterm surveillance clinics. Clinicians were blinded to quantitative measurements of fFN (qfFN), although they were aware of qualitative fFN results. Parametric survival models for sPTB, with time‐updated covariates, were developed and the best was selected using the Akaike and Bayesian information criteria. The model was developed on the first 624 consecutive women and validated on the subsequent 625. Fractional polynomials were used to accommodate possible non‐linear effects of qfFN and CL. The estimated probability of delivery before 30, 34 or 37 weeks' gestation and within 2 or 4 weeks of testing was calculated for each patient and analyzed as a predictive test for the actual occurrence of each event. Predictive statistics were calculated to compare training and validation sets.ResultsThe final model that was selected used a log‐normal survival curve with CL, √qfFN and previous sPTB/preterm prelabor rupture of membranes as predictors. Predictive statistics were similar for training and validation sets. Areas under the receiver–operating characteristics curves ranged from 0.77 to 0.99, indicating accurate prediction across all five delivery outcomes.ConclusionssPTB in high‐risk asymptomatic women can be predicted accurately using a model combining qfFN and CL, which supersedes the single‐threshold fFN test, demographic information and obstetric history. This algorithm has been incorporated into an App (QUiPP) for widespread use. Copyright © 2015 ISUOG. Published by John Wiley & Sons Ltd.
High‐intensity focused ultrasound treatment of placenta accreta after vaginal delivery: a preliminary study
Authors: Bai Y. , Luo X. , Li Q. , Yin N. , Fu X. , Zhang H. , Qi H. 
Published: April 2015

ABSTRACTObjectiveTo evaluate the safety and efficiency of high‐intensity focused ultrasound (HIFU) in the treatment of placenta accreta after vaginal delivery.MethodsEnrolled into this study between September 2011 and September 2013 were 12 patients who had been diagnosed with placenta accreta following vaginal delivery and who had stable vital signs. All patients were treated using an ultrasound‐guided HIFU treatment system. As indication of the effectiveness of the treatment we considered decreased vascular index on color Doppler imaging, decrease in size of residual placenta compared with pretreatment size on assessment by three‐dimensional ultrasound with Virtual Organ Computer‐aided Analysis, reduced signal intensity and degree of enhancement on magnetic resonance imaging and avoidance of hysterectomy following treatment. To assess the safety of HIFU treatment, we recorded side effects, hemorrhage, infection, sex steroid levels, return of menses and subsequent pregnancy. Patients were followed up in this preliminary study until December 2013.ResultsThe 12 patients receiving HIFU treatment had an average postpartum hospital stay of 6.8 days and an average period of residual placental involution of 36.9 days. HIFU treatment did not apparently increase the risk of infection or hemorrhage and no patient required hysterectomy. In all patients menstruation recommenced after an average of 80.2 days, and sex steroid levels during the middle luteal phase of the second menstrual cycle were normal. Two patients became pregnant again during the follow‐up period.ConclusionThis preliminary study suggests that ultrasound‐guided HIFU is a safe and effective non‐invasive method to treat placenta accreta patients after vaginal delivery who have stable vital signs and desire to preserve fertility. Copyright © 2015 ISUOG. Published by John Wiley & Sons Ltd.
Vakuumkomponenten für UHV und XHV aus Aluminium
Authors: Bergner Ute , Wolfgramm Stephan , Gottschall Sophie , Worsch Christian , Flämmich Michael 
Published: April 2015

AbstractIm ersten Teil des Beitrags wurde gezeigt, dass moderne Aluminiumlegierungen über Festigkeiten verfügen, die zur Herstellung von Alu‐CF‐Flanschen für vielfache Dichtzyklen geeignet sind. Dabei ist es wichtig, dass sowohl beim Herstellungsprozess von Bauteilen als auch später im Einsatz kritische Grenztemperaturen nicht überschritten werden, welche die Festigkeit des Materials verringern. Der vorliegende Beitrag erklärt, wie reproduzierbare Prozessbedingungen beim Schweißen die Fertigung vakuumdichter Schweißnähte mit sauberer Wurzelbildung sicher stellen. Experimentell konnte nachgewiesen werden, dass unter Berücksichtigung der Materialeigenschaften bei der Konstruktion und mit speziellen Schweiß‐parametern sichergestellt werden kann, dass beim Schweißprozess im Schneidkantenbereich die kritischen Temperaturen nicht überschritten werden. Vergleichsmessungen an Aluminium‐ und Edelstahlkammern zeigen, dass mit Aluminium als Werkstoff in kürzerer Zeit und mit weniger Energieaufwand (niedrigere Ausheiztemperatur) im Vergleich zu Edelstahl UHV‐Bedingungen erreicht werden.
Schweißen mit dem Laserstrahl im Vakuum
Authors: Reisgen Uwe , Olschok Simon , Jakobs Stefan , Mücke Michael 
Published: April 2015

AbstractIn der Automobilindustrie werden Strahlschweißverfahren erfolgreich beim Fügen hochwertiger Bauteile eingesetzt. Hierbei stehen Komponenten des Antriebsstranges im Vordergrund. Insbesondere bei der Komponentenfertigung von Kupplungen, Zahnrad‐Wellen Verbindungen und Antriebswellen wird das Elektronenstrahlschweißen in kleinen Vakuum‐Taktkammern eingesetzt. Der Einsatz von leistungsstarken Festkörperlasern führt dagegen oft zu negativen Folgen, wie Verschmutzung durch Prozessemissionen oder eine stärkere Spritzerneigung. Durch den Einsatz des Laserstrahlschweißens im Vakuum können diese Begleiterscheinungen vermindert und gleichzeitig die Einschweißtiefe und die Nahtqualität gesteigert werden. Der Beitrag stellt erste Ergebnisse an Werkstücken aus der Automobilindustrie vor.
A Novel Turbomolecular Pump for R&D and Analytical Applications
Authors: Funke Ralf , Schnacke Ernst , Voss Gerhard 
Published: April 2015

AbstractTurbomolecular pumps are high‐vacuum pumps which are used both for attaining very low ultimate pressures down to 10−10 mbar and for handling of high process gas flows up to inlet pressures of 10−3 mbar. Pumping speed and compression of these pumps essentially depend on the diameter of the inlet flange, on the design and rotational speed of the rotor and the Holweck stage respectively, and on gas type of the gases to be pumped.The development of the novel TURBOVAC i/iX turbomolecular pump by Oerlikon Leybold Vacuum aimed at the realization of high pumping speeds and high compression ratios, especially for light gases. Both the rotor design and the bearing concept were particularly adapted to these requirements, also by using modern computer simulation tools.This design concept has already proven its functionality in R&D and analytical applications.
Reframing Coalitions as Systems Interventions: A Network Study Exploring the Contribution of a Youth Violence Prevention Coalition to Broader System Capacity
Authors: Bess Kimberly D. 
Published: April 2015

AbstractThis longitudinal research conceptualizes community coalitions as events in local intervention systems (Hawe et al. in Am J Commun Psychol 43(3–4):267–276, 2009). It explores the potential contribution coalitions make, through the collaborative activities of their members, to the broader intervention systems in which they are embedded. Using social network analysis, it examines patterns of structural change in a network of 99 organizations focused on youth violence prevention (YVP) over a 5‐year period in which 30 of the 99 organizations were involved in a local YVP Coalition. Both longitudinal modeling and cross sectional analyses are used to examine change in system capacity—strong interorganizational networks—related to patterns of network density, centralization, and hierarchy. Somewhat surprisingly, the study found that capacity in the broader YVP Intervention System actually diminished during the 5‐year period of the coalition’s operation, though part of the system—the sub‐network that made up the YVP Coalition—was marginally strengthened. In this case, therefore, the evidence suggests that power and relational resources in the broader YVP Intervention System were redistributed. The article explores how the definition of capacity related to density and hierarchy may be contextually dependent. Implications for the role of coalitions in building system capacity are discussed.
MEDON MEETS A CYCLOPS?ODYSSEY22.310–80
Authors: Brelinski Tim 
Published: April 2015

ὣς φάτο, τοῦ δ’ ἤκουσε Μέδων πεπνυμένα εἰδώς·πεπτηὼς γὰρ ἔκειτο ὑπὸ θρόνον, ἀμφὶ δὲ δέρμαἕστο βοὸς νεόδαρτον, ἀλύσκων κῆρα μέλαιναν.So [Telemachus] spoke, and wise Medon heard him; for he had crouched down and was lying under a chair, and had wrapped around himself the newly flayed skin of an ox, avoiding grim death. (Od.22.361–3)Immediately following the death of the suitors, near the end ofOdyssey22, we witness three scenes of supplication in quick succession. The first and unsuccessful suppliant is Leodes, the only suitor to survive, albeit briefly, theMnesterophonia. The second and third suppliants, respectively, are the bard Phemius and the herald Medon. Leodes pleads directly with Odysseus for his life, citing his previous conduct, that he had said or done no wrong to the women of the household. He also claims that he had actually attempted to keep the suitors' bad behaviour in check, an assertion corroborated by the narrator's own words (21.146–67). Odysseus rejects Leodes' plea and decapitates the prophet, putting a sudden end to his supplication (22.310–29). After this failed supplication, Phemius nervously considers either seeking refuge at the altar of Zeus Herkeios, located in Odysseus' courtyard, or directly supplicating Odysseus. He chooses the latter and also appeals to Telemachus as witness that he sang for the suitors only under compulsion (330–53). Telemachus intervenes and Medon, who overhears Telemachus' plea for mercy on behalf of Phemius and Medon, suddenly jumps up, throws off the ox hide under which he has escaped notice, grasps Telemachus by the knees, and asks the young man to vouch for and save him from Odysseus too (354–77).
CICERO,LEG.1.6: ‘PLEASURABLE’ ANNALS?
Authors: Marincola John 
Published: April 2015

quamobrem aggredere, quaesumus, et sume ad hanc rem tempus, quae est a nostris hominibus adhuc aut ignorata aut relicta. nam post annales pontificum maximorum, quibus nihil potest esse iucundius, si aut ad Fabium aut ad eum qui tibi semper in ore est, Catonem, aut ad Pisonem aut ad Fannium aut ad Vennonium uenias, quamquam ex his alius alio plus habet uirium, tamen quid tam exile quam isti omnes?3iucundiusω: <in > iucundiusDavies: ieiuniusUrsinus: nudiusRob. Steph.The manuscript readingiucundiushas had a few defenders, but nearly all editors have chosen to emend, and of the several emendations proposed, the favourite has been Orsini'sieiunius, adopted recently in Jonathan Powell's Oxford Classical Text, in Andrew Dyck's magisterial commentary, and in the new edition of the fragments of the Roman historians. Although the emendation can now be considered canonical, it is nevertheless worthwhile to restate and augment the arguments for retaining the manuscript reading.
ISAAC VOSSIUS, CATULLUS AND THE CODEX THUANEUS
Authors: Kiss Dániel 
Published: April 2015

For Bernd Niebling and his colleagues at the Lesesaal Altes Buch of the Universitätsbibliothek MünchenWhile the earliest complete manuscripts of Catullus to survive today were written in the fourteenth century, it is well known that poem 62 already appears in an anthology from the ninth century, the Codex Thuaneus (Paris, Bibliothèque nationale de France, Parisinus lat. 8071). However, the Thuaneus may once have contained one more poem of Catullus. In his commentary on the poet, which appeared in 1684 but had been written decades earlier, the Dutch scholar Isaac Vossius makes the following comment on the last two lines of poem 11:Praetereunte postquam Tactus aratro est] Vetustissimum exemplar Thuanæum in quo hoc Catulli carmen variorum epigrammatis subjungitur, legitfractus, nontactus. Et hoc probo, nisi malisstratus, nam in quibusdam libristractuslegebatur.It is surprising to find a reference to a lost part of such a well-known manuscript in a source from the seventeenth century. One may well ask whether Vossius really read this poem in the Codex Thuaneus. Could he have seen this manuscript? Can he be relied on to report its contents truthfully? And could a part of the volume have been lost since the seventeenth century? I will argue that the answer to all these questions is yes, and that it is very likely that the Thuaneus once contained Catullus 11 as well as 62. I will set out the consequences of this for our understanding of Catullus' manuscript tradition. Next, I will discuss another ancient manuscript of Catullus that Vossius claims to have read, namely his ‘vetus liber Mediolanensis’. The article will close with an appendix on the history of the Thuaneus before it was studied by Vossius.
LUTATIUS CATULUS, CALLIMACHUS AND PLAUTUS'BACCHIDES
Authors: Heyworth S.J. 
Published: April 2015

Aulus Gellius records an epigram of the Roman consul Q. Lutatius Catulus (Noctes Atticae19.9.14 = fr. 1 Blänsdorf/Courtney):Aufugit mi animus; credo, ut solet, ad Theotimumdeuenit. sic est, perfugium illud habet.quid si non interdixem, ne illunc fugitiuummitteret ad se intro, sed magis eiceret?ibimu' quaesitum. uerum ne ipsi teneamurformido. quid ago? da, Venu', consilium.
TWO TEXTUAL NOTES ON PINDAR'S EIGHTHNEMEAN
Authors: Lane Nicholas 
Published: April 2015

πολλὰ γὰρ πολλᾷ λέλεκται, νεαρὰ δ᾽ ἐξευρόντα δόμεν βαϲάνῳ 20ἐϲ ἔλεγχον, ἅπαϲ κίνδυνοϲ· ὄψον δὲ λόγοι φθονεροῖϲιν,ἅπτεται δ᾽ ἐϲλῶν ἀεί, χειρόνεϲϲι δ᾽ οὐκ ἐρίζει.κεῖνοϲ καὶ Τελαμῶνοϲ δάψεν υἱόν, φαϲγάνῳ ἀμφικυλίϲαιϲ.21. ὄψον δὲ λόγοι BD : δὲ λόγοι om. Tricliniusφθονεροῖϲιν BD : φθόνῳ εἰϲίν Vauvilliers (vel potius φθονερῷ ᾽ιϲιν)I translate: ʻFor many things have been told in many ways, but to give novel things, when one has found them out, to the touchstone | For testing is pure danger: words are anamuse-boucheto the envious, | And it fastens on good men always, not taking issue with inferiors. | That too gnawed at Telamon's son, had him writhing on a sword.’ The difficulty presented by the transition in 22 from the plural ʻthe envious' to the singular subject ʻit' will be obvious. However, some commentators, including Mezger, Fennell and Bury, have assumed that φθόνοϲ can be supplied as the subject of ἅπτεται in 22 from φθονεροῖϲιν in 21, and the modern texts of Pindar – Bowra, Puech, Turyn and Snell–Maehler – do not mention the possibility of corruption in 21.
SOPHOCLES, SEDUCTION AND SHRIVELLING:ICHNEUTAIFR. 316 RADT
Authors: Thomas Oliver 
Published: April 2015

Sophocles, fr. 316 comprises matching entries in Photius,Lex.p. 489 Porson and theSudaρ166, which are thought to derive from Pausanias the Atticist's dictionary. Erbse presents the following text (ρ5):ῥικνοῦσθαι: τὸ διέλκεσθαι καὶ παντοδαπῶς διαστρέφεσθαι κατ' εἶδος. λέγεται δὲ καὶ τὸ καμπύλον γίγνεσθαι ἀσχημόνως καὶ κατὰ συνουσίαν καὶ ὄρχησιν, κάμπτοντα τὴν ὀσφῦν. Σοφοκλῆς Ἰχνευταῖς.
The BDS Campaign against Israel: Lessons from South Africa
Authors: Yi Joseph E. , Phillips Joe 
Published: April 2015

ABSTRACTThe Boycott, Divestment, and Sanctions (BDS) campaign against Israel is animated by a pragmatic strain that views external sanctions as effective pressure against a small democratic state and by a moralistic Manichean strain that portrays Israelis as oppressors. Both strains hearken back to the earlier campaign against apartheid in South Africa. We argue that doing so misreads the lessons of South Africa. Sanctions may have contributed to ending apartheid, but they operated in conjunction with improved security and interpersonal trust among negotiators. Key contenders moved from a discourse of oppression to one that humanized one another as partners with legitimate concerns. These conditions are missing from the Israeli–Palestinian conflict. Both sides consider their security to be precarious and they are locked in competing narratives of victimization, which further erode mutual trust and security. Measures to improve the parties’ security and trust would contribute to mutual concessions and greater justification for sanctions if the Israeli government is intransigent.
Political Theory Simulations in the Classroom: Simulating John Locke’s Second Treatise of Government
Authors: Glasgow Derek 
Published: April 2015

ABSTRACTPolitical scientists frequently use in-class simulations as teaching tools. However, few such exercises have been developed to assist in teaching pre-modern political theories. This is unfortunate because simulations effectively promote active learning and excite students about course material. This article develops a new simulation to teach Locke'sSecond Treatise of Governmentin an introductory general education or political science course. Surveys of participants indicate that the Locke simulation promotes active learning, as well as understanding of course concepts, teamwork, and interest in the material.
Alzheimer's disease-related amyloid-β induces synaptotoxicity in human iPS cell-derived neurons
Authors: Nieweg K , Andreyeva A , van Stegen B , Tanriöver G , Gottmann K 
Published: April 2015

AbstractHuman induced pluripotent stem cell (iPSC)-derived neurons have been proposed to be a highly valuable cellular model for studying the pathomechanisms of Alzheimer's disease (AD). Studies employing patient-specific human iPSCs as models of familial and sporadic forms of AD described elevated levels of AD-related amyloid-β (Aβ). However, none of the present AD iPSC studies could recapitulate the synaptotoxic actions of Aβ, which are crucial early events in a cascade that eventually leads to vast brain degeneration. Here we established highly reproducible, human iPSC-derived cortical cultures as a cellular model to study the synaptotoxic effects of Aβ. We developed a highly efficient immunopurification procedure yielding immature neurons that express markers of deep layer cortical pyramidal neurons and GABAergic interneurons. Upon long-term cultivation, purified cells differentiated into mature neurons exhibiting the generation of action potentials and excitatory glutamatergic and inhibitory GABAergic synapses. Most interestingly, these iPSC-derived human neurons were strongly susceptible to the synaptotoxic actions of Aβ. Application of Aβ for 8 days led to a reduction in the overall FM4–64 and vGlut1 staining of vesicles in neurites, indicating a loss of vesicle clusters. A selective analysis of presynaptic vesicle clusters on dendrites did not reveal a significant change, thus suggesting that Aβ impaired axonal vesicle clusters. In addition, electrophysiological patch-clamp recordings of AMPA receptor-mediated miniature EPSCs revealed an Aβ-induced reduction in amplitudes, indicating an impairment of postsynaptic AMPA receptors. A loss of postsynaptic AMPA receptor clusters was confirmed by immunocytochemical stainings for GluA1. Incubation with Aβ for 8 days did not result in a significant loss of neurites or cell death. In summary, we describe a highly reproducible cellular AD model based on human iPSC-derived cortical neurons that enables the mechanistic analysis of Aβ-induced synaptic pathomechanisms and the development of novel therapeutic approaches.
Sphingosine-1-phosphate receptor 3 promotes leukocyte rolling by mobilizing endothelial P-selectin
Authors: Nussbaum Claudia , Bannenberg Sarah , Keul Petra , Gräler Markus H. , Gonçalves-de-Albuquerque Cassiano F. , Korhonen Hanna , von Wnuck Lipinski Karin , Heusch Gerd , de Castro Faria Neto Hugo C. , Rohwedder Ina , Göthert Joachim R. , Prasad Vysakh Pushpa , Haufe Günter , Lange-Sperandio Baerbel , Offermanns Stefan , Sperandio Markus , Levkau Bodo 
Published: April 2015

AbstractSphingosine-1-phosphate (S1P) participates in inflammation; however, its role in leukocyte rolling is still unclear. Here we use intravital microscopy in inflamed mouse cremaster muscle venules and human endothelial cells to show that S1P contributes to P-selectin-dependent leukocyte rolling through endothelial S1P receptor 3 (S1P3) and Gαq, PLCβ and Ca2+. Intra-arterial S1P administration increases leukocyte rolling, while S1P3 deficiency or inhibition dramatically reduces it. Mast cells involved in triggering rolling also release S1P that mobilizes P-selectin through S1P3. Histamine and epinephrine require S1P3 for full-scale effect accomplishing it by stimulating sphingosine kinase 1 (Sphk1). In a counter-regulatory manner, S1P1 inhibits cAMP-stimulated Sphk1 and blocks rolling as observed in endothelial-specific S1P1−/− mice. In agreement with a dominant pro-rolling effect of S1P3, FTY720 inhibits rolling in control and S1P1−/− but not in S1P3−/− mice. Our findings identify S1P as a direct and indirect contributor to leukocyte rolling and characterize the receptors mediating its action.