Refine
Year of publication
Document Type
- Article (16041)
- Part of Periodical (2820)
- Working Paper (2358)
- Preprint (2224)
- Doctoral Thesis (2069)
- Book (1736)
- Conference Proceeding (1172)
- Part of a Book (1071)
- Report (471)
- Review (165)
Language
- English (30322) (remove)
Keywords
- taxonomy (749)
- new species (449)
- morphology (178)
- Deutschland (142)
- Syntax (126)
- Englisch (120)
- distribution (117)
- biodiversity (103)
- inflammation (100)
- Deutsch (98)
Institute
- Medizin (5400)
- Physik (4058)
- Wirtschaftswissenschaften (1927)
- Frankfurt Institute for Advanced Studies (FIAS) (1857)
- Biowissenschaften (1567)
- Center for Financial Studies (CFS) (1499)
- Informatik (1496)
- Biochemie und Chemie (1090)
- Sustainable Architecture for Finance in Europe (SAFE) (1077)
- House of Finance (HoF) (714)
This paper presents a brief overview of idiomatic expressions in the Norwegian LFG grammar NorGram and shows how the rich lexical information of the LFG grammar can be reused in an HPSG-like grammar with a radically different approach to alternating argument frames. Rather than accounting for idioms by means of special idiom lexical entries, which is the standard approach in LFG and HPSG, a constructional approach is taken where the verbs of the idioms are left underspecified with regard to whether they are idioms or not. A hierarchy of subconstruction types is assumed, which for each piece of evidence provided by the words and rules of the sentence, narrows down the possible frames of the verb to just one.
Degree adverbs in Mauritian
(2014)
In Mauritian, degree words exhibit an extreme syntactic polymorphism in combining with all major categories. When two forms coexist, *mari* ('very') and *boukou* ('a lot'), they select the predicate they modify on semantic more than syntactic criteria. We analyse degree words as adverbs with a double syntactic function: as complements in postverbal position (since they can by themselves trigger the short verbal form) and as adjuncts otherwise. We extend our analysis to inequality comparatives, *pli / plis* ('more') and *mwin / mwins* ('less') which are also polymorphic, with a double life as adjunct and complement.
We examine noun phrases and predication in Khoekhoe, a Central Khoisan language, arguing that members of all open word classes can function equally and without derivation as predicates, and that predicative use is primary and referential use is derived syntactically by relativization. We then present a formal HPSG analysis, in which members of all open word classes enter the syntax as predicates and in which all argument NPs are derived in a uniform manner as projections of pronominal elements, modified by relative clauses, building on Sag's (1997) analysis of English relative clauses. We will then argue that, additionally, DPs may project directly to clauses, yielding a second predication structure.
In a most recent corpus study on Persian, Faghiri & Samvelian (2014) found a significant effect of relative length in the ordering preferences between the direct and indirect objects in the preverbal domain corresponding to "long-before-short". They furthermore showed that the position of the direct object mainly depends on its degree of determination, and put into question the broadly accepted dual view based solely on differential object marking. In this paper, we provide experimental evidence in support of these corpus findings and further propose a unified account of ordering preferences between the two objects on the basis of conceptual accessibility.
The present study is concerned with the complex ways in which alternating relative complementisers in Coptic are employed as a morphological flagging device for unbounded dependencies in various types of relative clause constructions and wh questions. We shall argue in particular that the alternation in shape is locally conditioned by properties of the complement (TAME) and the antecedent noun (definiteness), which can be modelled via selectional features such as COMPS and MOD, plus the prosodic status of right-adjacent material (phrase vs. clitic). We shall show that all applicable conditions carry over from relatives to wh in-situ, suggesting to model the polyfunctionality of these complementisers in terms a systematic alternation between resumptive SLASH and in-situ QUE dependencies, modelled in terms of a lexical rule.
Furthermore, we shall discuss the status of unbounded dependencies and argue that the pervasiveness of resumption with relatives and ex-situ wh arguments can be attributed to the absence of gap-synsem on ARG-ST . We shall argue that apparent subject "gaps" in relative constructions are of a highly local nature, best to be understood in terms of subcategorisation for a finite VP complement. Finally, we shall show that the ban on argument gaps does not carry over to wh ex-situ adjuncts, providing additional motivation for maintaining a systematic distinction between these two types of extraction.
I argue for a new type of non-standard constituent in German; a modifier-collocational-cluster. This type of cluster combines (i) a modifier and (ii) a PP from a light-verb construction (or a Funktionsverbgefüge (FVG) as they are known in German) or a bare noun. Such strings are found in German in initial (prefield) position in certain cases of apparent multiple fronting. We are dealing with a syntax-semantics mismatch here since the modifier does not semantically modify the element with which it can first syntactically combine. I show that the modifier is a collocate of both its co-prefield element but also of the verb. I propose a schema which lexically licenses the building of such clusters and I show how we can encode information about what I refer to as collocational selection in the lexical entries of the type of lexemes involved in these multi-word strings. The analysis can be seen as lexical but does not require lexical storage of phrasal elements.
So-called ''Exhaustive Conditionals'' (ECs, also known as ''Unconditionals'') have been an important focus of recent research. We develop an HPSG analysis of governed ECs (e.g. 'no matter how intelligent the students are ...'), sketch an approach to ungoverned ECs (e.g. 'however intelligent the students are...'), and evaluate three possible analyses of reduced ECs (e.g. 'no matter how intelligent the students ...', 'however intelligent the students...').
Much discussion of the comparative correlative construction exemplified by The more I read, the more I understand has been concerned with how much cross–linguistic variation there is in this area. Culicover and Jackendoff (1999) suggest that there is considerable variation, but Den Dikken (2005) suggests with data from a variety of languages that the variation is quite limited. Modern Standard Arabic has a comparative correlative construction which is quite different from Engish and the other languages that Den Dikken considers, suggesting that there is more variation in this domain than he assumes. However, it is not difficult to provide an analysis of the construction and other related constructions within the HPSG framework.
In Dutch V-final clauses the verbs tend to form a cluster in which the main verb is separated from its syntactic arguments by one or more other verbs. In HPSG the link between the main verb and its arguments is canonically modeled in terms of argument inheritance, also known as argument composition or generalized raising. When applied to Dutch, this treatment yields a number of problems, making incorrect predictions about the interaction with the binding principles and the passive lexical rule. To repair them this paper proposes an alternative, in which subject raising and complement raising are modeled in terms of different devices. More specifically, while subject raising is modeled in terms of lexical constraints, as for English, complement raising is modeled in terms of a more general constraint on headed phrases. This new constraint not only accounts for complement raising out of verbal complements, it also deals with complement raising out of adjectival and adpositional complements, as well as with complement raising out of PP adjuncts and subject NPs. It is, hence, a rather powerful device. To prevent overgeneration we add a number of constraints. For Dutch, the relevant constraints block complement raising out of CPs, V-initial VPs and P-initial PPs. For English, the Empty COMPS Constraint is sufficient to block complement raising entirely.
Hungarian infinitival constructions have both mono-clausal and bi-clausal properties at the same time. The arguments of the infinitive behave the same way as the arguments of the finite verb do, but the non-finite verb has its own left periphery. After discussing the general description of Hungarian sentence structure and presenting an HPSG analysis for it – including a description of the connection between word order and scope order in the Hungarian left periphery – this paper presents an analysis for Hungarian infinitival constructions. The analysis lexically distinguishes the left peripheral arguments of the infinitive from its complements, and allows the infinitive and its left peripheral arguments to form constituents, while the complements of the infinitive are inherited to the finite verb.
This paper presents a unified approach to multiple nominative and accusative constructions in Korean. We identify 16 semantic relations holding between two consecutive NPs in multiple case marking constructions, and propose each semantic relation as a licensing condition on double case marking. We argue that the multiple case marking constructions are merely the sequences of double case marking, which are formed by dextrosinistrally sequencing the pairs of the same-case marked NPs of same or different type. Some appealing consequences of this proposal include a new comprehensive classification of the sequences of same-case NPs and a straightforward account of some long standing problems such as how the additional same-case NPs are licensed, and in what respects the multiple nominative marking and the multiple accusative marking are alike and different from each other.
This paper presents a syntactic HPSG analysis of distance distributivity in Polish, where the challenge is to uniformly analyse a number of function lexemes PO 'each' which share their form and semantic contribution, but differ in their syntactic behaviour. To this end, the HPSG notion of weak head is employed in a novel way.
We show how the variation in the passive in Danish, English, and German can be accounted for. The dimensions in which the three languages differ are
- the existence of a morphological passive in Danish
- a subject requirement in Danish and English resulting in expletive insertion in impersonal
- constructions in Danish and absence of impersonal passives in English the possibility to promote the secondary object to subject in Danish
The differences are accounted for by differences in the structural/lexical case distinction and by mapping processes that insert expletives in Danish. The passive in general is accounted for by a lexical rule that is uniform across languages and hence captures the generalization regarding passive.
In this paper I introduce the notion of Usage Preferences (UPs), which are statistically significant preferences in usage which can concern any aspect of linguistics. I suggest that multiple violations of UPs can have additive effects, causing grammatical sentences to be judged as unacceptable. A new judgment on sentences is proposed, the downarrow (↓) to mark sentences that are taken to be grammatical but unacceptable due to UP violations. I illustrate the idea of UPs on the basis of a discussion of the English verbal anaphor do so, involving both a corpus analysis and two acceptability experiments. This leads to a discussion of the relationship between grammaticality and acceptability and to remarks on the methodological importance of taking UPs into account both in linguistic theorizing and in the construction of acceptability experiments.
This paper presents an analysis of the complex NP island effects in Chinese. I follow Ginzburg & Sag (2000)'s analysis of in situ wh-interrogative construction and propose that feature percolation from the non-head clause daughter to the head daughter is required for a proper treatment of in situ wh-relative. A semantic analysis of the idiosyncrasy of weishenme 'why' reveals that a definite reading is forced for a wh-relative when weishenme stays in situ. This requirement causes feature percolation into relative head to fail. In this way I show that island effects in Chinese can be independently ruled out in the grammar as a case of contradiction.
The present article discusses several aspects of the so-called correlate-es construction in German. This complex clausal construction can be identified by a correlative nominal element es ('it') occuring in the matrix clause and a right-peripheral full clausal argument linked to es. The article supports the hypothesis that correlative es has a janus-faced nature between an expletive and a referential meaning. This is the reason why existing approaches are not sufficient to capture the properties of the discussed construction in its entirety. The first part of the article sums up the common view on correlative es including the empirical properties of the construction as well as a brief survey of the relevant previous approaches trying to account for correlative es. Based on new empirical data, the second part of the article shows that none of these accounts is able to capture all relevant facts of the correlate-es construction because existing approaches usually ignore that the realization of correlative es is verb-class dependent. Hence, a new constraint-based analysis is developed that takes both empirical observations into account, the verb-class dependence and the janus-faced nature.
Nonverbal predicates in Modern Hebrew have been the subject of investigation in a number of studies. However, to our knowledge, none of them was corpus-based. Corpus searches reveal that the nonverbal constructions which are most commonly addressed in the literature are not the most commonly used ones. Once a broader range of data is considered additional issues are raised. Our analysis addresses these issues, unifying the treatment of three types of copular constructions that we identify in MH. The analysis is implemented as part of a larger-scale grammar, and is extensively tested.
Khoekhoe, a Central Khoisan language, has been claimed to have a clause-second position and topological fields similar to German and Dutch. The position in front of the clause-second position can be occupied by either the matrix verb or a dependent. We argue that monomoraic words are exempt from the general head-final order of Khoekhoe and suggest that this can give rise to discontinuous constituents, where second-position clitics intervene within the VP. We show that this idea provides a simple account of Khoekhoe word order variation and formalize it within a linearization-based HPSG analysis that has a wider scope than the previous Minimalist analyses of Khoekhoe and that is compatible with evidence from tonology.
Simpler Syntax is an approach to grammar that calls for very restrictive limits on the notion of 'grammatical competence'. Specifically, it does not account for unacceptability judgments for sentences that are well-formed if they are fully licensed by the constructions of the language. SS leads us to seek accounts for such judgments in terms other than grammar per se, e.g., processing complexity, semantic or pragmatic well-formedness, discourse coherence, etc. I review several examples that suggest that the line that SS draws between competence on the one hand and performance and other mechanisms on the other is on the right track. Specifically, it does not account for unacceptability judgments for sentences that are well-formed if they are fully licensed by the constructions of the language. SS leads us to seek accounts for such judgments in terms other than grammar per se, e.g., processing complexity, semantic or pragmatic well-formedness, discourse coherence, etc. I review several examples that suggest that the line that SS draws between competence on the one hand and performance and other mechanisms on the other is on the right track.
In most recent work, Crysmann and Bonami (2012) suggest to reconcile the insights of inferential-realisational morphology (Anderson, 1992; Stump, 2001; Brown and Hippisley, 2012) with the full typology of variable morphotactics: situations where the expression of analogous feature sets can appear in various positions in the string. The authors proposed to account for these facts by importing, into HPSG, a variant of Paradigm Function Morphology (Stump, 2001) where realisation rules are doubly indexed for linear position and paradigmatic opposition. In this paper we first introduce more empirical challenges for theories of morphotactics that neither PFM nor the reformist approach of Crysmann and Bonami (2012) can accommodate. We then argue for a reappraisal of methods for morph introduction, and propose a new approach that replaces stipulation of classes of paradigmatic opposition with a general distinction between expression and conditioning (Carstairs, 1987; Noyer, 1992) which greatly expands the scope of Pāṇini’s Principle.
Unbounded dependencies in Modern Standard Arabic often involve not a gap but a null resumptive pronoun. The facts are quite complex, but it is not too difficult to extend the SLASH mechanism of HPSG to handle dependencies with a null resumptive pronoun. It is also not too difficult to restrict the distribution of gaps appropriately.
Comparison of the ellipsis-based theory of non-constituent coordination with its alternatives
(2012)
In this paper, I compare the ellipsis-based theory of non-constituent coordination proposed in Yatabe (2001) with three of its alternatives, namely the theory that has been widely accepted within the context of Categorial Grammar, Mouret's HPSG-based theory, and the theory proposed by Bachrach and Katzir in the framework of the Minimalist Program. It is found (i) that the CG-based theory of non-constituent coordination cannot deal with medial RNR, i.e. a subset of right-node raising constructions in which either all or a part of the right-node-raised material is realized at a location other than the right edge of the final conjunct, (ii) that Mouret's theory encounters similar difficulties when applied to RNR, and (iii) that Bachrach and Katzir's theory cannot be applied to left-node raising in English, has difficulty capturing the semantic inertness of medial RNR, and overgenerates in several ways. The ellipsis-based theory, on the other hand, appears to be consistent with all the observations.
Charge-dependent two- and three-particle correlations measured in Xe-Xe collisions at sNN−−−√=5.44 TeV are presented. Results are obtained for charged particles in the pseudorapidity range |η|<0.8 and transverse momentum interval 0.2≤pT<5.0 GeV/c for different collision centralities. The three-particle correlator γαβ≡⟨cos(φα+φβ−2Ψ2)⟩, calculated for different combinations of charge sign α and β, is expected to be sensitive to the presence of the Chiral Magnetic Effect (CME). Its magnitude is similar to the one observed in Pb-Pb collisions in contrast to a smaller CME signal in Xe-Xe collisions than in Pb-Pb collisions predicted by Monte Carlo (MC) calculations including a magnetic field induced by the spectator protons. These observations point to a large non-CME contribution to the correlator. Furthermore, the charge dependence of γαβ can be described by a blast wave model calculation that incorporates background effects and by the Anomalous Viscous Fluid Dynamics model with values of the CME signal consistent with zero. The Xe-Xe and Pb-Pb results are combined with the expected CME signal dependence on the system size from the MC calculations including a magnetic field to obtain the fraction of CME contribution in γαβ, fCME. The CME fraction is compatible with zero for the 30% most central events in both systems and then becomes positive; averaging over the 0-70% centrality interval yields an upper limit of 2% (3%) and 25% (32%) at 95% (99.7%) confidence level for the CME signal contribution to γαβ in Xe-Xe and Pb-Pb collisions, respectively.
Predicative complements canonically show number and/or gender agreement with their target. The most detailed proposal on how to model it in HPSG is provided in Kathol (1999). This proposal, though, chiefly deals with the predicative adjectives of the Romance languages, and turns out to be inappropriate for dealing with predicate nominals. There is an obvious way to repair it, but it cannot be fitted in the canonical HPSG treatment of clauses with a predicative complement. It can be fitted, though, in a treatment of such clauses that was proposed in Van Eynde (2009). Adopting that treatment, the agreement is modeled in terms of a constraint on the lexemes which select a predicative complement.
This paper presents an HPSG formalisation of how the ellipsis of case-marking affects the focus of the clause in Japanese. We restrict our attention to the nominative and accusative markers ga and o, and in view of the fact that the ellipsis effects on focushood vary between 1) ga and o and 2) different argument structures of the head verb, develop an essentially lexicalist account that combines both aspects, in which the implicit focus argument position is specified in the predicate. We argue that if a constituent is an implicit focus it does not, while if one is not it does, require a case-marker to be focused.
It has been analyzed that the word order of English comparative inversion is analogous to that of other subject-auxiliary inversions in that only a finite auxiliary verb can be followed by the subject. However, English comparative inversion should be distinguished from other inversions because the subject can be located between a cluster of auxiliary verbs and the non-auxiliary verb phrase in English comparative inversion. Existing analyses on subject-auxiliary inversion cannot account for this special kind of inversion. This paper proposes a new phrase type for English comparative inversion within the construction-based HPSG. In addition, I suggest that constraints on properties of lexemes participating in the new phrase type are governed by the construction-based approach, while the word order of English comparative inversion is determined by rules that the word order domain approach adopts. Also, it will be shown that these proposals can capture the word order of nor-inversion, as-inversion, and so-inversion as well as that of comparative inversion.
The Japanese infinitive-clause construction (InfCx) and gerund-clause construction (GerCx), which are the most basic subordination structures (considered as coordination structures by some) in the language, may convey a wide range of interclausal semantic relations, including 'temporal sequence', 'cause', and 'manner', largely due to pragmatic enrichment. This work addresses the question of what the core meaning(s) of the two constructions is (are), and demonstrates (i) that the InfCx and GerCx indicate either that the first-clause eventuality precedes or temporally subsumes the second-clause eventuality or that the two clauses stand in the rhetorical relation of contrast, and (ii) that the GerCx has a distinct sense that the InfCx lacks, which gives rise to the 'resulting state' interpretation.
It is known that VP-ellipsis and VP-anaphora are typologically different phenomena. English has VP-ellipses whereas Korean has VP-anaphora. The goals of this paper are (i) to develop a unified algorithm which can analyze these two different phenomena and (ii) to explain them using the developed resolution algorithm. In order to analyze these phenomena, this paper incorporates Jager's anaphora resolution mechanism (2010) into the typed feature structure formalism of Head-driven Phrase Structure Grammar (HPSG). In this paper, VP-ellipsis and VP-anaphora are analyzed as follows. First, English do and Korean kuleha-ta are introduced with the Geach value, and this value is changed with a slash-elimination rule. Then, one constituent combines with another by ordinary syntactic rules, while the information on the target predicate is percolated up. When a potential source appears, a slash-introduction rule is applied. Then, the source predicate activates the VP-resolution rule, and the target predicate is connected with the source in the semantic representations.
The dispreference for subject case ellipsis in OSV sentences has been analyzed as resulting from a violation of a structural requirement on the position of bare subject NPs (Ahn and Cho 2006a, 2006b, 2007). In this study, we present evidence from an acceptability rating experiment demonstrating that OSV sentences containing a case-ellipsed subject exhibit acceptability patterns different from ungrammatical sentences violating a core syntactic principle on case assignment and that these sentences are judged acceptable when the subject refers to expected, predictable information in context. This evidence supports the conclusion that the dispreference for subject case ellipsis in OSV sentences is due to violations of probabilistic constraints that favor case marking for rare types of subjects and such violations can be remedied by non-syntactic information.
The direct evidential "-te" in Korean: Its interaction with person and experiencer predicates
(2012)
This paper discusses the complex relations among the direct evidential "-te", person, and experiencer predicates in Korean. The questions of the paper are: (i) how the three components are related with each other in the evidential sentences, and (ii) how the interactions of the three components can be formally analyzed to correctly license only the well-formed evidential sentences. I show that in direct evidential construction with a non-private predicate (e.g. "pwutulep-" 'soft'), the asserter/epistemic authority (i.e. the speaker "na" 'I' in declarative or the addressee "ne" 'you' in question) must be the experiencer of the predicate, but there is no such constraint in direct evidential construction with a private predicate (e.g. "aphu-" 'sick'). I also show that the direct evidential construction with a non-private predicate is an instance of self-ascription. Then I propose an analysis of the experiencer predicates and associated lexical rules in the Minimal Recursion Semantics (MRS) (Copestake, et al., 2005) of Head-driven Phrase Structure Grammar (HPSG) (Pollard and Sag, 1994; Sag, et al., 2003).
Measurement of electrons from beauty-hadron decays in pp and Pb-Pb collisions at √sNN = 5.02 TeV
(2023)
The production of electrons from beauty-hadron decays was measured at midrapidity in proton-proton (pp) and central Pb-Pb collisions at center-of-mass energy per nucleon-nucleon pair sNN−−−√ = 5.02 TeV, using the ALICE detector at the LHC. The cross section measured in pp collisions in the transverse momentum interval 2<pT<8 GeV/c was compared with models based on perturbative quantum chromodynamics calculations. The yield in the 10% most central Pb-Pb collisions, measured in the interval 2<pT<26 GeV/c, was used to compute the nuclear modification factor RAA, extrapolating the pp reference cross section to pT larger than 8 GeV/c. The measured RAA shows significant suppression of the yield of electrons from beauty-hadron decays at high pT and does not show a significant dependence on pT above 8 GeV/c within uncertainties. The results are described by several theoretical models based on different implementations of the interaction of heavy quarks with a quark-gluon plasma, which predict a smaller energy loss for beauty quarks compared to light and charm quarks.
Measurement of electrons from beauty-hadron decays in pp and Pb–Pb collisions at √sNN = 5.02 TeV
(2023)
The production of electrons from beauty-hadron decays was measured at midrapidity in proton-proton (pp) and central Pb-Pb collisions at center-of-mass energy per nucleon-nucleon pair sNN−−−√ = 5.02 TeV, using the ALICE detector at the LHC. The cross section measured in pp collisions in the transverse momentum interval 2<pT<8 GeV/c was compared with models based on perturbative quantum chromodynamics calculations. The yield in the 10% most central Pb-Pb collisions, measured in the interval 2<pT<26 GeV/c, was used to compute the nuclear modification factor RAA, extrapolating the pp reference cross section to pT larger than 8 GeV/c. The measured RAA shows significant suppression of the yield of electrons from beauty-hadron decays at high pT and does not show a significant dependence on pT above 8 GeV/c within uncertainties. The results are described by several theoretical models based on different implementations of the interaction of heavy quarks with a quark-gluon plasma, which predict a smaller energy loss for beauty quarks compared to light and charm quarks.
Measurement of electrons from beauty-hadron decays in pp and Pb–Pb collisions at √sNN = 5.02 TeV
(2022)
The production of electrons from beauty-hadron decays was measured at midrapidity in proton-proton (pp) and central Pb-Pb collisions at center-of-mass energy per nucleon-nucleon pair sNN−−−√ = 5.02 TeV, using the ALICE detector at the LHC. The cross section measured in pp collisions in the transverse momentum interval 2<pT<8 GeV/c was compared with models based on perturbative quantum chromodynamics calculations. The yield in the 10% most central Pb-Pb collisions, measured in the interval 2<pT<26 GeV/c, was used to compute the nuclear modification factor RAA, extrapolating the pp reference cross section to pT larger than 8 GeV/c. The measured RAA shows significant suppression of the yield of electrons from beauty-hadron decays at high pT and does not show a significant dependence on pT above 8 GeV/c within uncertainties. The results are described by several theoretical models based on different implementations of the interaction of heavy quarks with a quark-gluon plasma, which predict a smaller energy loss for beauty quarks compared to light and charm quarks.
The ALICE Collaboration reports three measurements in ultra-peripheral proton−lead collisions at forward rapidity. The exclusive two-photon process \ggmm and the exclusive photoproduction of J/ψ are studied. J/ψ photoproduction with proton dissociation is measured for the first time at a hadron collider. The cross section for the two-photon process of dimuons in the invariant mass range from 1 to 2.5 GeV/c2 agrees with leading order quantum electrodynamics calculations. The exclusive and dissociative cross sections for J/ψ photoproductions are measured for photon−proton centre-of-mass energies from 27 to 57 GeV. They are in good agreement with HERA results.
The ALICE Collaboration reports three measurements in ultra-peripheral proton−lead collisions at forward rapidity. The exclusive two-photon process \ggmm and the exclusive photoproduction of J/ψ are studied. J/ψ photoproduction with proton dissociation is measured for the first time at a hadron collider. The cross section for the two-photon process of dimuons in the invariant mass range from 1 to 2.5 GeV/c2 agrees with leading order quantum electrodynamics calculations. The exclusive and dissociative cross sections for J/ψ photoproductions are measured for photon−proton centre-of-mass energies from 27 to 57 GeV. They are in good agreement with HERA results.
The ALICE Collaboration reports three measurements in ultra-peripheral proton−lead collisions at forward rapidity. The exclusive two-photon process \ggmm and the exclusive photoproduction of J/ψ are studied. J/ψ photoproduction with proton dissociation is measured for the first time at a hadron collider. The cross section for the two-photon process of dimuons in the invariant mass range from 1 to 2.5 GeV/c2 agrees with leading order quantum electrodynamics calculations. The exclusive and dissociative cross sections for J/ψ photoproductions are measured for photon−proton centre-of-mass energies from 27 to 57 GeV. They are in good agreement with HERA results.
Recent GWAS allow us to calculate polygenic risk scores for ADHD. At the imaging level, resting-state fMRI analyses have given us valuable insights into changes in connectivity patterns in ADHD patients. However, no study has yet attempted to combine these two different levels of investigation. For this endeavor, we used a dopaminergic challenge fMRI study (L-DOPA) in healthy participants who were genotyped for their ADHD, MDD, schizophrenia, and body height polygenic risk score (PRS) and compared results with a study comparing ADHD patients and healthy controls. Our objective was to evaluate how L-DOPA-induced changes of reward-system-related FC are dependent on the individual polygenic risk score. FMRI imaging was used to evaluate resting-state functional connectivity (FC) of targeted subcortical structures in 27 ADHD patients and matched controls. In a second study, we evaluated the effect of ADHD and non-ADHD PRS in a L-DOPA-based pharmaco-fMRI-challenge in 34 healthy volunteers. The functional connectivity between the putamen and parietal lobe was decreased in ADHD patients. In healthy volunteers, the FC between putamen and parietal lobe was lower in ADHD high genetic risk participants. This direction of connectivity was reversed during L-DOPA challenge. Further findings are described for other dopaminergic subcortical structures. The FC between the putamen and the attention network showed the most consistent change in patients as well as in high-risk participants. Our results suggest that FC of the dorsal attention network is altered in adult ADHD as well as in healthy controls with higher genetic risk.
Changes in glutamatergic neuroplasticity has been proposed as one of the core mechanisms underlying the pathophysiology of depression. In consequence components of the glutamatergic synapse have been explored as potential targets for antidepressant treatment. The rapid antidepressant effect of the NMDA receptor antagonist ketamine and subsequent approval of its S-enantiomer (i.e. esketamine), have set the precedent for investigation into other glutamatergic rapid acting antidepressants (RAADs). In this review, we discuss the potential of the different glutamatergic targets for antidepressant treatment. We describe important clinical outcomes of several key molecules targeting components of the glutamatergic synapse and their applicability as RAADs. Specifically, here we focus on substances beyond (es)ketamine, for which meaningful data from clinical trials are available, including arketamine, esmethadone, nitrous oxide and other glutamate receptor modulators. Molecules only successful in preclinical settings and case reports/series are only marginally discussed. With this review, we aim underscore the critical role of glutamatergic modulation in advancing antidepressant therapy, thereby possibly enhancing clinical outcomes but also to reducing the burden of depression through faster therapeutic effects.
I provide a solution method in the frequency domain for multivariate linear rational expectations models. The method works with the generalized Schur decomposition, providing a numerical implementation of the underlying analytic function solution methods suitable for standard DSGE estimation and analysis procedures. This approach generalizes the time-domain restriction of autoregressive-moving average exogenous driving forces to arbitrary covariance stationary processes. Applied to the standard New Keynesian model, I find that a Bayesian analysis favors a single parameter log harmonic function of the lag operator over the usual AR(1) assumption as it generates humped shaped autocorrelation patterns more consistent with the data.
Machine learning entails a broad range of techniques that have been widely used in Science and Engineering since decades. High-energy physics has also profited from the power of these tools for advanced analysis of colliders data. It is only up until recently that Machine Learning has started to be applied successfully in the domain of Accelerator Physics, which is testified by intense efforts deployed in this domain by several laboratories worldwide. This is also the case of CERN, where recently focused efforts have been devoted to the application of Machine Learning techniques to beam dynamics studies at the Large Hadron Collider (LHC). This implies a wide spectrum of applications from beam measurements and machine performance optimisation to analysis of numerical data from tracking simulations of non-linear beam dynamics. In this paper, the LHC-related applications that are currently pursued are presented and discussed in detail, paying also attention to future developments.
Background: Patients undergoing allogeneic stem cell transplantation (aSCT) are at high risk to develop an invasive fungal disease (IFD). Optimisation of antifungal prophylaxis strategies may improve patient outcomes and reduce treatment costs.
Objectives: To analyse the clinical and economical impact of using continuous micafungin as antifungal prophylaxis.
Patients/Methods: We performed a single-centre evaluation comparing patients who received either oral posaconazole with micafungin as intravenous bridging as required (POS-MIC) to patients who received only micafungin (MIC) as antifungal prophylaxis after aSCT. Epidemiological, clinical and direct treatment cost data extracted from the Cologne Cohort of Neutropenic Patients (CoCoNut) were analysed.
Results: Three hundred and thirteen patients (97 and 216 patients in the POS-MIC and MIC groups, respectively) were included into the analysis. In the POS-MIC and MIC groups, median overall length of stay was 42 days (IQR: 35–52 days) vs 40 days (IQR: 35–49 days; p = .296), resulting in median overall costs of €42,964 (IQR: €35,040–€56,348) vs €43,291 (IQR: €37,281 vs €51,848; p = .993), respectively. Probable/proven IFD in the POS-MIC and MIC groups occurred in 5 patients (5%) vs 3 patients (1%; p = .051), respectively. The Kaplan-Meier analysis showed improved outcome of patients in the MIC group at day 100 (p = .037) and day 365 (p < .001) following aSCT.
Conclusions: Our study results demonstrate improved outcomes in the MIC group compared with the POS-MIC group, which can in part be explained by a tendency towards less probable/proven IFD. Higher drug acquisition costs of micafungin did not translate into higher overall costs.
The first measurements of skewness and kurtosis of mean transverse momentum (⟨pT⟩) fluctuations are reported in Pb−Pb collisions at sNN−−−√ = 5.02 TeV, Xe−Xe collisions at sNN−−−√ = 5.44 TeV and pp collisions at s√=5.02 TeV using the ALICE detector. The measurements are carried out as a function of system size ⟨dNch/dη⟩1/3|η|<0.5, using charged particles with transverse momentum (pT) and pseudorapidity (η), in the range 0.2<pT<3.0 GeV/c and |η|<0.8, respectively. In Pb−Pb and Xe−Xe collisions, positive skewness is observed in the fluctuations of ⟨pT⟩ for all centralities, which is significantly larger than what would be expected in the scenario of independent particle emission. This positive skewness is considered a crucial consequence of the hydrodynamic evolution of the hot and dense nuclear matter created in heavy-ion collisions. Furthermore, similar observations of positive skewness for minimum bias pp collisions are also reported here. Kurtosis of ⟨pT⟩ fluctuations is found to be in good agreement with the kurtosis of Gaussian distribution, for most central Pb−Pb collisions. Hydrodynamic model calculations with MUSIC using Monte Carlo Glauber initial conditions are able to explain the measurements of both skewness and kurtosis qualitatively from semicentral to central collisions in Pb--Pb system. Color reconnection mechanism in PYTHIA8 model seems to play a pivotal role in capturing the qualitative behavior of the same measurements in pp collisions.
The first measurements of skewness and kurtosis of mean transverse momentum (⟨pT⟩) fluctuations are reported in Pb−Pb collisions at sNN−−−√ = 5.02 TeV, Xe−Xe collisions at sNN−−−√ = 5.44 TeV and pp collisions at s√=5.02 TeV using the ALICE detector. The measurements are carried out as a function of system size ⟨dNch/dη⟩1/3|η|<0.5, using charged particles with transverse momentum (pT) and pseudorapidity (η), in the range 0.2<pT<3.0 GeV/c and |η|<0.8, respectively. In Pb−Pb and Xe−Xe collisions, positive skewness is observed in the fluctuations of ⟨pT⟩ for all centralities, which is significantly larger than what would be expected in the scenario of independent particle emission. This positive skewness is considered a crucial consequence of the hydrodynamic evolution of the hot and dense nuclear matter created in heavy-ion collisions. Furthermore, similar observations of positive skewness for minimum bias pp collisions are also reported here. Kurtosis of ⟨pT⟩ fluctuations is found to be in good agreement with the kurtosis of Gaussian distribution, for most central Pb−Pb collisions. Hydrodynamic model calculations with MUSIC using Monte Carlo Glauber initial conditions are able to explain the measurements of both skewness and kurtosis qualitatively from semicentral to central collisions in Pb--Pb system. Color reconnection mechanism in PYTHIA8 model seems to play a pivotal role in capturing the qualitative behavior of the same measurements in pp collisions.
The first measurements of K∗(892)0 resonance production as a function of charged-particle multiplicity in Xe−Xe collisions at sNN−−−√= 5.44 TeV and pp collisions at s√= 5.02 TeV using the ALICE detector are presented. The resonance is reconstructed at midrapidity (|y|<0.5) using the hadronic decay channel K∗0→K±π∓. Measurements of transverse-momentum integrated yield, mean transverse-momentum, nuclear modification factor of K∗0, and yield ratios of resonance to stable hadron (K∗0/K) are compared across different collision systems (pp, p−Pb, Xe−Xe, and Pb−Pb) at similar collision energies to investigate how the production of K∗0 resonances depends on the size of the system formed in these collisions. The hadronic rescattering effect is found to be independent of the size of colliding systems and mainly driven by the produced charged-particle multiplicity, which is a proxy of the volume of produced matter at the chemical freeze-out. In addition, the production yields of K∗0 in Xe−Xe collisions are utilized to constrain the dependence of the kinetic freeze-out temperature on the system size using the hadron resonance gas in partial chemical equilibrium (HRG-PCE) model.
The first measurements of K∗(892)0 resonance production as a function of charged-particle multiplicity in Xe−Xe collisions at sNN−−−√= 5.44 TeV and pp collisions at s√= 5.02 TeV using the ALICE detector are presented. The resonance is reconstructed at midrapidity (|y|<0.5) using the hadronic decay channel K∗0→K±π∓. Measurements of transverse-momentum integrated yield, mean transverse-momentum, nuclear modification factor of K∗0, and yield ratios of resonance to stable hadron (K∗0/K) are compared across different collision systems (pp, p−Pb, Xe−Xe, and Pb−Pb) at similar collision energies to investigate how the production of K∗0 resonances depends on the size of the system formed in these collisions. The hadronic rescattering effect is found to be independent of the size of colliding systems and mainly driven by the produced charged-particle multiplicity, which is a proxy of the volume of produced matter at the chemical freeze-out. In addition, the production yields of K∗0 in Xe−Xe collisions are utilized to constrain the dependence of the kinetic freeze-out temperature on the system size using the hadron resonance gas in partial chemical equilibrium (HRG-PCE) model.
Three new species of Onitis Fabricius, 1798 are described: Onitis bhomorensis sp. nov. from Assam (Northeast India), O. kethai sp. nov. and O. visthara sp. nov. from Karnataka (South India). Onitis bordati Cambefort, 1988 is recorded for the first time for the Indian subcontinent, from Meghalaya, India. Thus, the number of species of Onitis from the subcontinent has been raised to 20 and that of the Oriental region to 26. Illustrated identification keys to all the species of the genus Onitis from the Indian subcontinent are provided with distributional details and maps. Lectotype and paralectotypes designated for Onitis philemon Fabricius, 1801. Descriptions are provided for aedeagus of seventeen species of Onitis, as well as images of type specimens for nine species from their respective repositories. Distribution maps are provided for the species of Onitis of the Indian subcontinent.