Refine
Year of publication
- 2008 (768) (remove)
Document Type
- Article (301)
- Working Paper (100)
- Book (95)
- Doctoral Thesis (85)
- Part of Periodical (81)
- Conference Proceeding (31)
- Part of a Book (25)
- Preprint (18)
- Report (14)
- Other (10)
Language
- English (768) (remove)
Keywords
- Deutsch (10)
- Metapher (9)
- USA (7)
- Bank (6)
- Englisch (6)
- Phonetik (6)
- Phonologie (6)
- Bedeutung (5)
- Geldpolitik (5)
- Grammatik (5)
Institute
- Medizin (82)
- Center for Financial Studies (CFS) (59)
- Biochemie und Chemie (55)
- Physik (36)
- Geowissenschaften (35)
- Biowissenschaften (32)
- Extern (26)
- E-Finance Lab e.V. (20)
- Informatik (18)
- Wirtschaftswissenschaften (16)
The total stratospheric organic chlorine and bromine burden was derived from balloon-borne measurements in the tropics (Teresina, Brazil, 5°04´ S, 42°52´ W) in 2005. Whole air samples were collected cryogenically at altitudes between 15 and 34 km. For the first time, we report measurements of a set of 28 chlorinated and brominated substances in the tropical upper troposphere and stratosphere including ten substances with an atmospheric lifetime of less than half a year. The substances were quantified using pre-concentration techniques followed by Gas Chromatography with Mass Spectrometric detection. In the tropical tropopause layer at altitudes between 15 and 17 km we found 1.1–1.4% of the chlorine and 6–8% of the bromine to be present in the form of very short-lived organic compounds. By combining the data with tropospheric reference data and age of air observations the abundances of inorganic chlorine and bromine (Cly and Bry) were derived. At an altitude of 34 km we calculated 3062 ppt of Cly and 17.5 ppt of Bry from the decomposition of both long- and short-lived organic source gases. Furthermore we present indications for the presence of additional organic brominated substances in the tropical upper troposphere and stratosphere.
Although Walter Benjamin was never timid when it came to writing, one practice he consistently avoided was that of creating neologisms. It is therefore with all the more reluctance that I find myself compelled to resort to something similar, in order to sum up a motif that has imposed itself over the years in my reading of Benjamin. What is involved is, to be sure, not exactly a neologism, since it does not involve the creation of a new word, but rather the highlighting of a word-part, a suffix (eine Nachsilbe). In English, to be sure, this suffix, when spoken, is indistinguishable from a word: what distinguishes it from a word is not audible, but only legible: a hyphen, marking a separation that is also a joining, a 'Bindestrich' that does not bind it to anything in particular and yet that requires it to be bound to something else. The suffix in question thus sounds deceptively familiar, since it coincides, audibly, with the word "abilities". However, unlike that word, its first letter - which purely by accident happens to be the first letter of the alphabet--is preceded by a dash. When written in isolation, this gives it a somewhat bizarre appearance, to be sure, since suffixes are not usually encountered separately from the words they modify. But this bizarre appearance pales when compared to its German 'original'. If the book of essays to be published in English under the title, "Benjamin’s -abilities," is ever translated into German - "back" into German I was tempted to write, since German here is of course the language in which Benjamin wrote and in which I generally read him - then its title, were it to be entirely faithful to the English, would indeed have to involve the creation of a neologism. For translated back into German, the German title would require its readers to "read, what was never written", namely: "Benjamins -barkeiten" (written, "Bindestrich- b--kleingeschrieben").
In a letter to Scholem, dated 22 December, 1924, Benjamin famously writes of the manuscript that was to become his 'Trauerspiel' book: "[I]ndessen überrascht mich nun vor allem, daß, wenn man so will, das Geschriebene fast ganz aus Zitaten besteht" (GS I.3, 881). Much has been made of the mosaic-like citational technique to which Benjamin refers here; his "Zitatbegriff" is said, for example, to subtend the theory of a "mikrologische Verarbeitung" of "Denkbruchstücken" into "Ideen" that Benjamin develops as his theory of representation in the "Erkenntniskritische Vorrede", which in turn figures the relation between individual phenomena and their "ideas" in astral terms. Because, however, the 'Trauerspiel' book is so often understood only on this theoretical level, e.g. as either an early articulation of Benjamin’s "avant garde" and "messianic" philosophy of history (Jäger, Kany, and Pizer) or as a performance of his systems of allegory (Menninghaus) and "constructivism" (Schöttker), his "Zitierpraxis" and the actual citations that form large parts of 'Der Ursprung des deutschen Trauerspiel' have seldom been read for the purchase they provide on the vexed status of the period and concept that was the book’s direct subject, namely, the German Baroque.
The 14 known localities of Coenagrion armatum in Ukraine are listed and the 27 dragonfly species recorded are presented. An expedition devoted to revisit 10 of them in spring 2007 did not result in a confirmation at any of them. Here, all localities are described in detail and possible reasons for the absence of the species are discussed. These include habitat alterations because of anthropogenic impact, such as agricultural activity, as well as decreasing competitiveness against Mediterranean species that spread in response to altered climatic conditions. Proposed measures of conservation of C. armatum in Ukraine include a) the inclusion into the Red Data Book of Ukraine under category I (Endangered) and b) additional studies, monitoring and habitat conservation.
Twenty-eight Odonata species were recorded in the Poliskyi Nature Reserve (Zhytomyr oblast’, North Ukraine) in 2006 and 2007, 18 of which were reported for the first time from this location. This included such rare species as Somatochlora arctica (second record in the Ukraine, first record for 100 years), Leucorrhinia dubia, Leucorrhinia rubicunda and Leucorrhinia albifrons. A breeding site and a dense population of Nehalennia speciosa were found in a bog near the river. Zholobnytsya. The record of Orthetrum coerulescens is the northernmost in Ukraine.
The claim of this paper is that embedded definites can, despite the appearances, be accounted for on the uniqueness approach. Far from being a surprise, we argue that the behavior of embedded definites is actually expected once two independent facts are taken into account: the ability of noun phrases to take scope, i.e., to be interpreted in a different place from their syntactic position, and the interaction of presuppositions and scope-taking elements. Specifically, we analyze embedded definites as a case of inverse linking (Gabbay and Moravscik, 1974; May, 1977): the embedded definite takes scope over the embedding one. The presupposition of the embedded definite is weakened as a result of the independently motivated process of intermediate accommodation (Kratzer, 1989; Berman, 1991). In our case, this process transfers the presupposition of the embedding definite into the restrictor of the embedded one.
Like other scope-taking processes, inverse linking is generally taken to be subject to locality constraints: if a syntactic island, such as a finite clause boundary, intervenes in the path of a scope-taking element, then the resulting reading is unavailable or degraded (Rodman, 1976). Since our account views embedded definites as cases of inverse linking, we predict that inserting an island into an embedded definite, all else being equal, should lead to a similar degradation. We report results from an online survey with 800 participants that confirm this prediction.
The paper presents an additional argument for a specific account of semantic binding: the flat-binding analysis. The argument is based on observations concerning sloppy interpretations in verb phrase ellipsis when the binder is not the subject of the elided VP. In one such case, it is important that one of the binders belong to the domain of the other. This case can be derived from the flat-binding analysis as is shown in the paper, while it is unclear how to account for it within other analyses of semantic binding.
The purpose of this phase III clinical trial was to compare two different extracellular contrast agents, 1.0 M gadobutrol and 0.5 M gadopentate dimeglumine, for magnetic resonance imaging (MRI) in patients with known or suspected focal renal lesions. Using a multicenter, single-blind, interindividual, randomized study design, both contrast agents were compared in a total of 471 patients regarding their diagnostic accuracy, sensitivity, and specificity to correctly classify focal lesions of the kidney. To test for noninferiority the diagnostic accuracy rates for both contrast agents were compared with CT results based on a blinded reading. The average diagnostic accuracy across the three blinded readers (‘average reader’) was 83.7% for gadobutrol and 87.3% for gadopentate dimeglumine. The increase in accuracy from precontrast to combined precontrast and postcontrast MRI was 8.0% for gadobutrol and 6.9% for gadopentate dimeglumine. Sensitivity of the average reader was 85.2% for gadobutrol and 88.7% for gadopentate dimeglumine. Specificity of the average reader was 82.1% for gadobutrol and 86.1% for gadopentate dimeglumine. In conclusion, this study documents evidence for the noninferiority of a single i.v. bolus injection of 1.0 M gadobutrol compared with 0.5 M gadopentate dimeglumine in the diagnostic assessment of renal lesions with CE-MRI.
„Great writers,“ those who constitute our canon (at any given moment, one should add warily, since aesthetic canons fluctuate considerably over time), have invariably been the focus of reception studies, partly because they provide the most fertile ground for research, but partly also because literary scholars (and in particular the aspiring doctoral candidate: I myself graduated with an influence /reception study of this kind) need some justification for their endeavors, and what better ticket into the ivory rower - or onto the book market - than the study of the most seminal and widely accepted authors? James Joyce is just such a „great author.“ And „James Joyce and German Literature,“ the subject of this essay, must inevitably result in some form of reception study. But just what form should it take? Within the limited space of one article, it would be impossible to survey in toto Joyce's influence on German literature; that is, the multiple receptions of Joyce by some four or five generations of authors writing in German.
A list of all liverworts and mosses reported from the Maltese Islands with references has been compiled from the literature, which includes 23 species of liverworts and hornworts as well as 96 taxa of mosses. The list is completed by the results of a bryological fieldtrip in March 2008. During this trip, 14 species of liverworts and 40 species of mosses were collected, of which Cephaloziella baumgartneri, Didymodon luridus, Fissidens gracilifolius, Fossombronia echinata, Funaria pulchella, Riccia cavernosa and Weissia fallax are new to Malta. This raises the number of species known from the Maltese Islands to 23 horn- and liverworts and 100 mosses.
In 2007, a project named Adriatic Montenegro 2007 was initiated and realised under the protection of IDF. Stimulated by the suggestion of Vincent Kalkman from the European Invertebrate Survey, The Netherlands, distribution data for the Odonata of Adriatic Montenegro were collected and used to create distribution maps. These data and maps should then be used in the evaluation of conservation measures for individual odonate species as well as for the IUCN Red List of the Mediterranean countries (organized by the IUCN Centre for Mediterranean Cooperation) and the Project on an atlas of European dragonflies (a co-operation of all European countries organised by the European Invertebrate Survey, The Netherlands).
In July 2005, Rafal Bernard requested Oleg Kosterin to collect some samples of Nehalennia speciosa from West Siberia for a DNA analysis. Oleg replied that so far he had only seen one individual of this species 25 years ago, but asked in which habitats it should be sought for exactly. Rafal sent him a draft of his paper (Bernard & Wildermuth, 2005) devoted to this subject. Having read it, Oleg came to the conclusion that this habitat (shallow water with Sphagnum and Carex limosa or C. lasiocarpa) might occupy the largest area in the world just in the boggy West Siberian Plain. Personal consultation with the geobotanist Dr. Nikolai Lashchinskii confirmed this notion. Then an almost automatic supposition followed that this area may serve as the main reservoir of N. speciosa, considered a local and endangered species in Western and Central Europe. At the same time, the existing records of N. speciosa from West Siberia were remarkably scarce. It was known from the Khanty-Mansi Autonomous Region (basins of the Tura and Konda Rivers), a small number of records from North Altai and adjacent areas north of it, a record from the steppe zone of Novosibirsk Province (Karasuk), a record in the basin of the Tuba River (Krasnoyarskii Krai), and a dubious old record from Omsk (see the map in Belyshev (1973) and a review in Bernard & Wildermuth (2005)). There was no record from the boggy Irtysh-Ob’ interfluve, where we would expect the species to flourish. This could be explained by the lack of attention by odonatologists to that interesting area. In these circumstances, the project of a special expedition(-s) was put forward, aimed to check the presence, pattern of distribution, abundance and habitat preferences of N. speciosa in these areas. For a decisive expedition we chose the Vasyugan Bog, the largest bog in the world, more precisely its north-eastern margin where we could find a good base in Plotnikovo village, Bakchar District, Tomsk Province.
This paper presents a novel model of the lending process that takes into account that loan officers must spend time and effort to originate new loans. Besides generating predictions on loan officers’ compensation and its interaction with the loan review process, the model sheds light on why competition could lead to excessively low lending standards. We also show how more intense competition may fasten the adoption of credit scoring. More generally, hard-information lending techniques such as credit scoring allow to give loan officers high-powered incentives without compromising the integrity and quality of the loan approval process.
We investigate methods and tools for analyzing translations between programming languages with respect to observational semantics. The behavior of programs is observed in terms of may- and mustconvergence in arbitrary contexts, and adequacy of translations, i.e., the reflection of program equivalence, is taken to be the fundamental correctness condition. For compositional translations we propose a notion of convergence equivalence as a means for proving adequacy. This technique avoids explicit reasoning about contexts, and is able to deal with the subtle role of typing in implementations of language extensions.
We investigate methods and tools for analysing translations between programming languages with respect to observational semantics. The behaviour of programs is observed in terms of may- and mustconvergence in arbitrary contexts, and adequacy of translations, i.e., the reflection of program equivalence, is taken to be the fundamental correctness condition. For compositional translations we propose a notion of convergence equivalence as a means for proving adequacy. This technique avoids explicit reasoning about contexts, and is able to deal with the subtle role of typing in implementations of language extensions.
We investigate methods and tools for analysing translations between programming languages with respect to observational semantics. The behaviour of programs is observed in terms of may- and mustconvergence in arbitrary contexts, and adequacy of translations, i.e., the reflection of program equivalence, is taken to be the fundamental correctness condition. For compositional translations we propose a notion of convergence equivalence as a means for proving adequacy. This technique avoids explicit reasoning about contexts, and is able to deal with the subtle role of typing in implementations of language extensions.
This paper proves several generic variants of context lemmas and thus contributes to improving the tools for observational semantics of deterministic and non-deterministic higher-order calculi that use a small-step reduction semantics. The generic (sharing) context lemmas are provided for may- as well as two variants of must-convergence, which hold in a broad class of extended process- and extended lambda calculi, if the calculi satisfy certain natural conditions. As a guide-line, the proofs of the context lemmas are valid in call-by-need calculi, in callby-value calculi if substitution is restricted to variable-by-variable and in process calculi like variants of the π-calculus. For calculi employing beta-reduction using a call-by-name or call-by-value strategy or similar reduction rules, some iu-variants of ciu-theorems are obtained from our context lemmas. Our results reestablish several context lemmas already proved in the literature, and also provide some new context lemmas as well as some new variants of the ciu-theorem. To make the results widely applicable, we use a higher-order abstract syntax that allows untyped calculi as well as certain simple typing schemes. The approach may lead to a unifying view of higher-order calculi, reduction, and observational equality.
We present a higher-order call-by-need lambda calculus enriched with constructors, case-expressions, recursive letrec-expressions, a seq-operator for sequential evaluation and a non-deterministic operator amb that is locally bottom-avoiding. We use a small-step operational semantics in form of a single-step rewriting system that defines a (nondeterministic) normal order reduction. This strategy can be made fair by adding resources for bookkeeping. As equational theory we use contextual equivalence, i.e. terms are equal if plugged into any program context their termination behaviour is the same, where we use a combination of may- as well as must-convergence, which is appropriate for non-deterministic computations. We show that we can drop the fairness condition for equational reasoning, since the valid equations w.r.t. normal order reduction are the same as for fair normal order reduction. We evolve different proof tools for proving correctness of program transformations, in particular, a context lemma for may- as well as mustconvergence is proved, which restricts the number of contexts that need to be examined for proving contextual equivalence. In combination with so-called complete sets of commuting and forking diagrams we show that all the deterministic reduction rules and also some additional transformations preserve contextual equivalence.We also prove a standardisation theorem for fair normal order reduction. The structure of the ordering <=c a is also analysed: Ω is not a least element, and <=c already implies contextual equivalence w.r.t. may-convergence.