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Measurements of charged-particle production in pp, p−Pb, and Pb−Pb collisions in the toward, away, and transverse regions with the ALICE detector are discussed. These regions are defined event-by-event relative to the azimuthal direction of the charged trigger particle, which is the reconstructed particle with the largest transverse momentum (ptrigT) in the range 8<ptrigT<15 GeV/c. The toward and away regions contain the primary and recoil jets, respectively; both regions are accompanied by the underlying event (UE). In contrast, the transverse region perpendicular to the direction of the trigger particle is dominated by the so-called UE dynamics, and includes also contributions from initial- and final-state radiation. The relative transverse activity classifier, RT=NTch/⟨NTch⟩, is used to group events according to their UE activity, where NTch is the charged-particle multiplicity per event in the transverse region and ⟨NTch⟩ is the mean value over the whole analysed sample. The energy dependence of the RT distributions in pp collisions at s√=2.76, 5.02, 7, and 13 TeV is reported, exploring the Koba-Nielsen-Olesen (KNO) scaling properties of the multiplicity distributions. The first measurements of charged-particle pT spectra as a function of RT in the three azimuthal regions in pp, p−Pb, and Pb−Pb collisions at sNN−−−√=5.02 TeV are also reported. Data are compared with predictions obtained from the event generators PYTHIA 8 and EPOS LHC. This set of measurements is expected to contribute to the understanding of the origin of collective-like effects in small collision systems (pp and p−Pb).
Measurements of charged-particle production in pp, p−Pb, and Pb−Pb collisions in the toward, away, and transverse regions with the ALICE detector are discussed. These regions are defined event-by-event relative to the azimuthal direction of the charged trigger particle, which is the reconstructed particle with the largest transverse momentum (ptrigT) in the range 8<ptrigT<15 GeV/c. The toward and away regions contain the primary and recoil jets, respectively; both regions are accompanied by the underlying event (UE). In contrast, the transverse region perpendicular to the direction of the trigger particle is dominated by the so-called UE dynamics, and includes also contributions from initial- and final-state radiation. The relative transverse activity classifier, RT=NTch/⟨NTch⟩, is used to group events according to their UE activity, where NTch is the charged-particle multiplicity per event in the transverse region and ⟨NTch⟩ is the mean value over the whole analysed sample. The energy dependence of the RT distributions in pp collisions at s√=2.76, 5.02, 7, and 13 TeV is reported, exploring the Koba-Nielsen-Olesen (KNO) scaling properties of the multiplicity distributions. The first measurements of charged-particle pT spectra as a function of RT in the three azimuthal regions in pp, p−Pb, and Pb−Pb collisions at sNN−−−√=5.02 TeV are also reported. Data are compared with predictions obtained from the event generators PYTHIA 8 and EPOS LHC. This set of measurements is expected to contribute to the understanding of the origin of collective-like effects in small collision systems (pp and p−Pb).
Aspekte Schwarzer Geschichte(n) in "Berlin Global" : eine Führungs- und Ausstellungsreflexion
(2024)
Februar ist Black History Month und damit der ideale Zeitpunkt, eine Blogserie über Berliner Orte zu beginnen, die wir - Gianna Zocco und Sandra Folie - im Zuge unseres neuen Forschungsprojekts "Schwarze Narrative transkultureller Aneignung" besuchen: Museen, Theater, Verlage, Archive usw., die für eine afroeuropäisch fokussierte Literatur- und Kulturforschung relevant sind und mit denen wir ins Gespräch kommen wollen. Die erste Exkursion führte mich zur Ausstellung BERLIN GLOBAL im Humboldt Forum, die zu zeigen versucht, "wie die Stadt und ihre Menschen mit der Welt verbunden sind". Sie beruft sich dabei auf eine vielstimmige, partizipative Konzeption und Umsetzung und beschäftigt sich intensiv mit dem Thema des Kolonialismus und seinen Nachwirkungen. Unter dem Titel "Sichtbar werden" führten eine externe afrodeutsche Expertin und eine Museumsvermittlerin im Gespräch - miteinander, aber auch mit der Gruppe - durch die Spuren Schwarzer Geschichte(n) in der Ausstellung. Welche Aspekte Schwarzer Geschichte(n) müssen aber in einer solchen Ausstellung erst im Rahmen einer speziellen Führung "sichtbar werden", fragte ich mich vorab. Und würde sich die Führung mit ihrem Anspruch der Sichtbarmachung als ein Akt des 'narrating back' und damit der partiellen oder temporären Aneignung eines (zu) weiß kodierten Raumes wie des Humboldt Forums begreifen lassen? Die Expertin, die den thematischen Fokus setzte, war Tanja-Bianca Schmidt, freie Kuratorin und Kunsthistorikerin an der TU Dresden mit den Schwerpunkten Black Identity, rassismuskritische Kunstgeschichte, Ästhetik der Migration und Postkoloniale Theorie. Zusätzlich zu ihrer beruflichen Expertise brachte sie ihre persönlichen Erfahrungen als Schwarze Deutsche mit ein. Sophie Eliot, die als Outreach-Spezialistin für das Stadtmuseum Berlin tätig ist und sich in der diskriminierungskritischen und -sensiblen Museumsarbeit verortet, war ihre Gesprächspartnerin.
The elliptic flow (v2) of D0 mesons from beauty-hadron decays (non-prompt D0) was measured in midcentral (30-50%) Pb-Pb collisions at a centre-of-mass energy per nucleon pair sNN−−−√ = 5.02 TeV with the ALICE detector at the LHC. The D0 mesons were reconstructed at midrapidity (|y|<0.8) from their hadronic decay D0→K−π+, in the transverse momentum interval 2<pT<12 GeV/c. The result indicates a positive v2 for non-prompt D0 mesons with a significance of 2.7σ. The non-prompt D0-meson v2 is lower than that of prompt non-strange D mesons with 3.2σ significance in 2<pT<8 GeV/c, and compatible with the v2 of beauty-decay electrons. Theoretical calculations of beauty-quark transport in a hydrodynamically expanding medium describe the measurement within uncertainties.
Controlling and understanding electron correlations in quantum matter is one of the most challenging tasks in materials engineering. In the past years a plethora of new puzzling correlated states have been found by carefully stacking and twisting two-dimensional van der Waals materials of different kind. Unique to these stacked structures is the emergence of correlated phases not foreseeable from the single layers alone. In Ta-dichalcogenide heterostructures made of a good metallic “1H”- and a Mott insulating “1T”-layer, recent reports have evidenced a cross-breed itinerant and localized nature of the electronic excitations, similar to what is typically found in heavy fermion systems. Here, we put forward a new interpretation based on first-principles calculations which indicates a sizeable charge transfer of electrons (0.4-0.6 e) from 1T to 1H layers at an elevated interlayer distance. We accurately quantify the strength of the interlayer hybridization which allows us to unambiguously determine that the system is much closer to a doped Mott insulator than to a heavy fermion scenario. Ta-based heterolayers provide therefore a new ground for quantum-materials engineering in the regime of heavily doped Mott insulators hybridized with metallic states at a van der Waals distance.
Trait-dependent effects of biotic and abiotic filters on plant regeneration in Southern Ecuador
(2024)
Tropical forests have always fascinated scientists due to their unique biodiversity. However, our understanding of ecological processes shaping the complexity of tropical rainforests is still relatively poor. Plant regeneration is one of the processes that remain understudied in the tropics although this is a key process defining the structure, diversity and assembly of tropical plant communities. In my dissertation, I combine experimental, observational and trait-based approaches to identify processes shaping the assembly of seedling communities and compare associations between environmental conditions and plant traits across plant life stages. By working along a steep environmental gradient in the tropical mountains of Southern Ecuador, I was able to investigate how processes of plant regeneration vary in response to biotic and abiotic factors in tropical montane forests.
My dissertation comprises three complementary chapters, each addressing an individual research question. First, I studied how trait composition in plant communities varies in relation to the broad- and local-scale environmental conditions and across the plant life cycle. I measured key traits reflecting different ecological strategies of plants that correspond to three stages of the plant life cycle (i.e., adult trees, seed rain and recruiting seedlings). I worked on 81 subplots along an elevational gradient covering a large climatic gradient at three different elevations (1000, 2000 and 3000 m a.s.l.). In addition, I measured soil and light conditions at the local spatial scale within each subplot. My findings show that the trait composition of leaves, seeds and seedlings changed similarly across the elevational gradient, but that the different life stages responded differently to the local gradients in soil nutrients and light availability. Consequently, my findings highlight that trait-environment associations in plant communities differ between large and small spatial scales and across plant life stages.
Second, I investigated how seed size affects seedling recruitment in natural forests and in pastures in relation to abiotic and biotic factors. I set up a seed sowing experiment in both habitat types and sowed over 8,000 seeds belonging to seven tree species differing in seed size. I found that large-seeded species had higher proportions of recruitment in the forests compared to small-seeded species. However, small-seeded species tended to recruit better in pastures compared to large-seeded species. I showed that high surface temperature was the main driver of differences in seedling recruitment between habitats, because it limited seedling recruitment of large-seeded species. The results from this experiment show that pasture restoration requires seed addition of large-seeded species and active protection of recruiting seedlings in order to mitigate harmful conditions associated with high temperatures in deforested areas.
Third, I examined the associations between seedling beta-diversity and different abiotic and biotic factors between and within elevations. I applied beta-diversity partitioning to obtain two components of beta-diversity: species turnover and species richness differences. I associated these components of beta-diversity with biotic pressures by herbivores and fungal pathogens and environmental heterogeneity in light and soil conditions. I found that species turnover in seedling communities was positively associated with the dissimilarity in biotic pressures within elevations and with environmental heterogeneity between elevations. Further, I found that species richness differences increased primarily with increasing environmental heterogeneity within elevations. My findings show that the associations between beta-diversity of seedling communities and abiotic and biotic factors are scale-dependent, most likely due to differences in species sorting in response to biotic pressures and species coexistence in response to environmental heterogeneity.
My dissertation reveals that studying processes of community assembly at different plant life stages and spatial scales can yield new insights into patterns and processes of plant regeneration in tropical forests. I investigated how community assembly processes are governed by abiotic and biotic filtering across and within elevations. I also experimentally explored how the process of seedling recruitment depends on seed size-dependent interactions, and verified how these effects are associated with abiotic and biotic filtering. Identifying such processes is crucial to inform predictive models of environmental change on plant regeneration and successful forest restoration. Further exploration of plant functional traits and their associations with local-scale environmental conditions could effectively support local conservation efforts needed to enhance forest cover in the future and halt the accelerating loss of biodiversity.
Highlights
• 153 chemicals of emerging concern detected in complex multi-component mixtures.
• 108 possible mixture risk assessment scenarios were investigated.
• Non-detects, QSARs, and experimental ecotoxicological data were integrated for risk assessment.
• 8 chemicals were the main risk drivers in at least one site across the River Aconcagua basin.
Abstract
Environmental risk assessments strategies that account for the complexity of exposures are needed in order to evaluate the toxic pressure of emerging chemicals, which also provide suggestions for risk mitigation and management, if necessary. Currently, most studies on the co-occurrence and environmental impacts of chemicals of emerging concern (CECs) are conducted in countries of the Global North, leaving massive knowledge gaps in countries of the Global South.
In this study, we implement a multi-scenario risk assessment strategy to improve the assessment of both the exposure and hazard components in the chemical risk assessment process. Our strategy incorporates a systematic consideration and weighting of CECs that were not detected, as well as an evaluation of the uncertainties associated with Quantitative Structure-Activity Relationships (QSARs) predictions for chronic ecotoxicity. Furthermore, we present a novel approach to identifying mixture risk drivers. To expand our knowledge beyond well-studied aquatic ecosystems, we applied this multi-scenario strategy to the River Aconcagua basin of Central Chile. The analysis revealed that the concentrations of CECs exceeded acceptable risk thresholds for selected organism groups and the most vulnerable taxonomic groups. Streams flowing through agricultural areas and sites near the river mouth exhibited the highest risks. Notably, the eight risk drivers among the 153 co-occurring chemicals accounted for 66–92 % of the observed risks in the river basin. Six of them are pesticides and pharmaceuticals, chemical classes known for their high biological activity in specific target organisms.
• Zahlen und Maßsysteme sind bereits aus dem antiken Ägypten und aus Mesopotamien belegt. Im 4. Jahrtausend vor unserer Zeitrechnung haben sich mit der hierarchisierten Gesellschaft auch Zahl- und Schriftzeichen entwickelt. Sie dienten vor allem der Zuteilung von Ressourcen.
• Die 13 Bücher der »Elemente« von Euklid (3. Jahrhundert vor unserer Zeit) sind die früheste erhaltene axiomatisch-deduktiv aufgebaute Sammlung mathematischen Wissens. Die Begeisterung für dieses Werk hielt über Jahrhunderte an.
• Die Ordnung von Beobachtungen durch die mathematische Erfassung und Auswertung von Daten ist in Wissenschaft und Alltag selbstverständlich. Mathematische Techniken der Statistik und Kartierung halfen Dr. John Snow im 19. Jahrhundert, die Ausbreitung der Cholera zu erforschen und zu bekämpfen.
• Trotzdem stößt die Mathematik bei der Schaffung von Ordnungen auch an Grenzen: Denn es gibt weder eine Garantie noch eine Anleitung für deren bestmögliche Nutzung. Dies zeigen nicht zuletzt Krisen wie die Coronapandemie oder die Klimakrise.
Der Anblick ist überwältigend. Ein buntes Sammelsurium der unterschiedlichsten Dinge, die sich dicht an dicht in den Fächern des raumhohen Regals drängen, eine Steilwand aus Wimmelbildern im Wunderkammer-Format. Wenn wir die Fächer allerdings genauer betrachten, stellt sich allmählich der Eindruck ein, dass es doch so etwas wie eine Ordnung der Dinge gibt. Nur welche?
Im Rahmen dieser publikationsbasierten Dissertation wurden drei wissenschaftliche Arbeiten veröffentlicht. Als Erstautorenschaft wurde 2022 die Arbeit “Effectiveness of High-intensity Focused Ultrasound (HIFU) Therapy of Solid and Complex Benign Thyroid Nodules - A Long-term Follow up Two-center Study.” im Journal “Experimental and Clinical Endocrinology & Diabetes” veröffentlicht. Im Folgenden wird der Inhalt dieser Arbeit dargelegt. Ein kurzer Überblick über die Ergebnisse der anderen beiden mitpublizierten Arbeiten findet sich im Kapitel „Weitere Ergebnisse der Arbeitsgruppe“.
Durch die hohe Prävalenz benigner Schilddrüsenknoten sind deren Behandlungsalternativen von großem wissenschaftlichem Interesse. Dabei bildet die nebenwirkungsarme, minimalinvasive Thermoablation mittels high-intensity focused ultrasound (HIFU) eine attraktive Alternative zu herkömmlichen Verfahren wie der Schilddrüsenchirurgie oder der Radioiodtherapie. Bei der HIFU-Echotherapie werden die Schilddrüsenknoten auf 80 - 90 Grad Celsius erhitzt, sodass eine irreversible Koagulationsnekrose entsteht. Um den Therapieprozess und die Indikationsstellung von HIFU bei benignen Schilddrüsenknoten zu optimieren, ist es notwendig, genaue Studien durchzuführen.
Ziel der vorliegenden bizentrischen Langzeitstudie war, die Effektivität von HIFU-Echotherapien bei benignen Schilddrüsenknoten zu evaluieren und erstmalig den Einfluss der Knotenmorphologie auf den Therapieerfolg zu untersuchen. Vor der Therapie und in regelmäßigen Intervallen nach der Therapie wurden die Größe und die Morphologie der Schilddrüsenknoten mittels Ultraschall dokumentiert. In der retrospektiven Studie wurden Daten von 58 Patienten ausgewertet. Dabei wurde die Gesamtpopulation in eine Gruppe mit soliden und in eine Gruppe mit komplexen Knoten eingeteilt. Die durchschnittliche prozentuale Volumenreduktion in jeder Gruppe wurde mit dem Wilcoxon-Signed-Rank Test statistisch analysiert.
Die Gesamtpopulation zeigte eine Volumenreduktion der zuvor abladierten Knoten von 38.86 % nach 3 Monaten (Spannweite: 4.03 % - 91.16 %, p < 0.0001, n = 25), 42.7 % nach 6 Monaten (Spannweite: 7.36 % - 93.2 %, p < 0.0001, n = 18), 62.21 % nach 9 Monaten (Spannweite: 12.88 % - 93.2 %, p = 0.0078, n = 8) und 61.42 % nach 12 Monaten (Spannweite: 39.39 % - 93.2 %, p > 0.05, n = 4). Die soliden Knoten hatten eine Volumenreduktion von 49.98 % nach 3 Monaten (Spannweite: 4.03 % - 91.16 %, p = 0.0001, n = 15), 46.40 % nach 6 Monaten (Spannweite: 7.36 % - 93.2 %, p = 0.001, n = 11), 65.77 % nach 9 Monaten (Spannweite: 39.39 % - 93.2 %, p = 0.0156, n = 7) und 63.88 % nach 12 Monaten (Spannweite: 39.39 % - 93.2%, p > 0.05, n = 2). Komplexe Knoten hatten eine Volumenreduktion von 35.2 % nach 3 Monaten (Spannweite: 5.85 % - 68.63 %, p = 0.002, n = 10), 36.89 % nach 6 Monaten (Spannweite: 12.23 % - 68.63 %, p = 0.0156, n = 7) und 63.64 % nach 12 Monaten (Spannweite: 52,38 % - 73.91 %, p > 0.05, n = 2).
In der vorliegenden bizentrischen Langzeitstudie wurde deutlich, dass HIFU-Echotherapie eine effektive Behandlungsoption benigner Schilddrüsenknoten ist. Erstmalig gezeigt wurde der Trend, dass solide Knoten besser auf HIFU-Echotherapie ansprechen als komplexe Knoten.
Anhand der gewonnenen Ergebnisse und der neuen Erkenntnisse zum Einfluss der Knotenmorphologie auf die HIFU-Echotherapie benigner Schilddrüsenknoten kann HIFU als Therapieoption besser bewertet werden. Eine differenziertere Indikationsstellung in Bezug auf solide und komplexe Knoten wird ermöglicht und die HIFU-Echotherapie kann gegen andere thermoablative Verfahren abgewogen werden.
This thesis develops a naturalist theory of phenomenal consciousness. In a first step, it is argued on phenomenological grounds that consciousness is a representational state and that explaining consciousness requires a study of the brain’s representational capacities. In a second step, Bayesian cognitive science and predictive processing are introduced as the most promising attempts to understand mental representation to date. Finally, in a third step, the thesis argues that the so-called “hard problem of consciousness” can be resolved if one adopts a form of metaphysical anti-realism that can be motivated in terms of core principles of Bayesian cognitive science.
Highlights
• An airport can result in high particle concentrations in a distant residential area.
• The particle size distribution indicated the airport as the main source of particles.
• Lower air traffic during the COVID-19 pandemic lead to lower particle concentrations.
• The particle concentration showed high temporal variations.
Abstract
Exposure to ultrafine particles has a significant influence on human health. In regions with large commercial airports, air traffic and ground operations can represent a potential particle source. The particle number concentration was measured in a low-traffic residential area about 7 km from Frankfurt Airport with a Condensation Particle Counter in a long-term study. In addition, the particle number size distribution was determined using a Fast Mobility Particle Sizer.
The particle number concentrations showed high variations over the entire measuring period and even within a single day. A maximum 24 h-mean of 24,120 cm−3 was detected. Very high particle number concentrations were in particular measured when the wind came from the direction of the airport. In this case, the particle number size distribution showed a maximum in the particle size range between 5 and 15 nm. Particles produced by combustion in jet engines typically have this size range and a high potential to be deposited in the alveoli. During a period with high air traffic volume, significantly higher particle number concentrations could be measured than during a period with low air traffic volume, as in the COVID-19 pandemic.
A large commercial airport thus has the potential to lead to a high particle number concentration even in a distant residential area. Due to the high particle number concentrations, the critical particle size, and strong concentration fluctuations, long-term measurements are essential for a realistic exposure analysis.
Correlations in azimuthal angle extending over a long range in pseudorapidity between particles, usually called the "ridge" phenomenon, were discovered in heavy-ion collisions, and later found in pp and p−Pb collisions. In large systems, they are thought to arise from the expansion (collective flow) of the produced particles. Extending these measurements over a wider range in pseudorapidity and final-state particle multiplicity is important to understand better the origin of these long-range correlations in small-collision systems. In this Letter, measurements of the long-range correlations in p−Pb collisions at sNN−−−√=5.02 TeV are extended to a pseudorapidity gap of Δη∼8 between particles using the ALICE, forward multiplicity detectors. After suppressing non-flow correlations, e.g., from jet and resonance decays, the ridge structure is observed to persist up to a very large gap of Δη∼8 for the first time in p−Pb collisions. This shows that the collective flow-like correlations extend over an extensive pseudorapidity range also in small-collision systems such as p−Pb collisions. The pseudorapidity dependence of the second-order anisotropic flow coefficient, v2({\eta}), is extracted from the long-range correlations. The v2(η) results are presented for a wide pseudorapidity range of −3.1<η<4.8 in various centrality classes in p−Pb collisions. To gain a comprehensive understanding of the source of anisotropic flow in small-collision systems, the v2(η) measurements are compared to hydrodynamic and transport model calculations. The comparison suggests that the final-state interactions play a dominant role in developing the anisotropic flow in small-collision systems.
We investigate the applicability of the well-known multilevel Monte Carlo (MLMC) method to the class of density-driven flow problems, in particular the problem of salinisation of coastal aquifers. As a test case, we solve the uncertain Henry saltwater intrusion problem. Unknown porosity, permeability and recharge parameters are modelled by using random fields. The classical deterministic Henry problem is non-linear and time-dependent, and can easily take several hours of computing time. Uncertain settings require the solution of multiple realisations of the deterministic problem, and the total computational cost increases drastically. Instead of computing of hundreds random realisations, typically the mean value and the variance are computed. The standard methods such as the Monte Carlo or surrogate-based methods are a good choice, but they compute all stochastic realisations on the same, often, very fine mesh. They also do not balance the stochastic and discretisation errors. These facts motivated us to apply the MLMC method. We demonstrate that by solving the Henry problem on multi-level spatial and temporal meshes, the MLMC method reduces the overall computational and storage costs. To reduce the computing cost further, parallelization is performed in both physical and stochastic spaces. To solve each deterministic scenario, we run the parallel multigrid solver ug4 in a black-box fashion.
Irgendwann ist jede Revolution zu Ende. An die Stelle revolutionärer Unordnung tritt eine neue Ordnung. Wann das genau passiert, ist nicht einfach festzustellen. Das liegt nicht nur daran, dass die Forschung sich viel mehr für die Ursachen und Anlässe von Revolutionen interessiert. Es liegt auch daran, wie Revolutionen enden.
Ordnungen sind enorm vielschichtig. Innerhalb einer Gemeinschaft, eines Staates leben wir immer schon – teilweise unhinterfragt – in einem Geflecht von Ordnungen, die sich überlagern, ergänzen und zum Teil auch widersprechen. Der Beitrag nähert sich diesen unterschiedlichen Dimensionen von Ordnungen und ihren Verschränkungen und stellt diese punktuell vor. Im zweiten Teil fokussiert er sich auf die Risiken demokratischer Ordnungen, die ein immer weiter um sich greifender Populismus mit sich bringt. Was dagegen hilft? Hierauf werden Antworten gesucht – nicht zuletzt bei Jürgen Habermas.
Les Républicains in Frankreich, die Tories in Großbritannien, die österreichischen Christdemokraten: Parteien, die jahrzehntelang als feste politische Größe in ihren Ländern galten, haben einen rapiden Bedeutungsverlust erlebt, manche sind in Richtung des rechten Randes gerückt. Doch eine gemäßigt konservative Kraft rechts der Mitte ist notwendig für eine stabile und zukunftsoffene Demokratie.
Warum in der Politik so viel von »Architektur« gesprochen wird und warum Architektur an sich nicht demokratisch sein kann, darüber hat sich der Architekturhistoriker Carsten Ruhl Gedanken gemacht
Globalisierung, Migration, neue Geschlechterverhältnisse, Bildungsexpansion: Dies alles verändert unsere sozialen Strukturen. Wie wirkt sich dieser Wandel auf Gesellschaft und Individuum aus? Diesen Fragen geht die DFG-Forschungsgruppe RISS (»Reconfiguration and Internalization of Social Structure«) nach.
Wie funktioniert die Verneinung in der Sprache? Und wie hängen die sprachlichen Strukturen hierfür mit der Wahrnehmung im Gehirn zusammen? Solchen Fragen widmet sich der neue Sonderforschungsbereich 1629 »Negation: Ein sprachliches und außersprachliches Phänomen« (NegLaB) an der Goethe-Universität. Bereits in die dritte Förderphase geht ein SFB aus der Biochemie, der sich mit der selektiven Autophagie befasst, einem natürlichen Vorgang, mit dem Zellen fehlerhafte oder überflüssige Bestandteile gezielt entsorgen können.
The Åland Islands archipelago enjoys a special international status sui generis, which essentially encompasses demilitarisation, neutralisation, and autonomy. This status is guaranteed under international law by the agreements of 1921, 1940, and 1947, which are still in force. Furthermore, there are convincing reasons to assume that the Åland Islands regime has grown into European customary law. By virtue of her international (treaty) obligations, Finland cannot unilaterally change this status under the present conditions, irrespective of domestic (constitutional) decisions. While integration into NATO’s collective defence system and the EU’s Common Security and Defence Policy structures is compatible with the special status of the Åland Islands, care must be taken by Finland and her partners to ensure that the obligations arising from these developments are fulfilled in accordance with the demilitarised and neutralised status of the archipelago. This includes that the use by Finnish troops for preventive defence, beyond the exceptions laid down in the 1921 Åland Agreement, is only permitted in the case (of threat) of an immediate and clearly identifiable attack.
The autonomous character of the Åland Islands was established under a League of Nations dispute settlement and implemented, inter alia, in Finnish legislation. Its essence even grew into customary law. The arrangements of 1921, however, do not constitute a bilateral treaty between Finland and Sweden. The UN assumes that the international mechanism to protect Åland’s autonomy did not become obsolete with the demise of the League of Nations, but was only “suspended until such time as an express decision has been taken by the United Nations to put it back into force”. A corresponding proposal could be submitted, in any case, both by Finland and/or Sweden or possibly even by any other UN member state, for discussion in the Sixth Committee. However, the final decision to re-activate this special mechanism would have to be adopted by the UN General Assembly.
EU Law applies to the Åland Islands in principle; however, Finland’s Accession Treaty to the EU to which Protocol No. 2 on the Åland Islands was annexed, established a number of specific rules which are still in force today. This, most notably, results in the limited application of value added tax and excise duties in the Åland Islands. Therefore, the rules on customs procedures apply with respect to the movement of goods to and from the Åland Islands. In addition, other provisions of Union law, in particular those relating to fundamental freedoms and European state aid law, may be relevant in view of the special fiscal status of the Åland Islands. However, assessing individual cases would require further information and in-depth studies. Irrespective of the requirements set out in the said Protocol, the EU is obliged to respect the national identity of Member States pursuant to Article 4 para. 2 TEU; this obligation includes respect for the special status of the Åland Islands under both international and Finnish constitutional law.
Previous phylogenetic analyses of the grass-specialist leafhopper tribe Chiasmini have resolved relationships among genera but have included few representatives of individual genera. Here the phylogeny of 20 Chinese species belonging to 8 chiasmine genera was investigated by combining DNA sequence data from two mitochondrial genes (COI, 16S) and two nuclear genes (H3, 28S). In both maximum likelihood (ML) and Bayesian inference (BI) analyses, relationships among genera were largely consistent with prior analyses, with most members of the tribe placed into two sister clades: (Exitianus + Nephotettix) and the remaining five sampled genera. To examine morphology-based species definitions in the taxonomically difficult genus Exitianus Ball, 1929, one mitochondrial gene (COI) and one nuclear gene (ITS2) were used to infer the phylogenetic relationships and status of two common and widespread species and compare the performance of different molecular species-delimitation methods. These analyses divide the included populations into two well-supported clades corresponding to current morphological species concepts but some inconsistencies occurred under the jMOTU, ABGD and bPTP methods depending on the which gene and analytical parameter values were selected. Considering the variable results yielded by methods employing single loci, the BPP method, which combines data from multiple loci, may be more reliable in Exitianus.
The Cladonematidae are a family of hydrozoans with a worldwide distribution and morphological adaptations for a benthic mode of life. Species of this family are characterized by high morphological variability, which has caused many taxonomical debates, mainly for the species of the genera Eleutheria Quatrefages, 1842 and Staurocladia Hartlaub, 1917. Herein, we describe Staurocladia dzilamensis sp. nov., a new species of crawling hydromedusa from the southern Gulf of Mexico. This finding also constitutes the first record of the genus Staurocladia for the Gulf of Mexico. The presence of additional nematocyst clusters, supplementing the apical one on the upper branch of the tentacles, places it within Staurocladia. The presence of exumbrellar buds, a conspicuous marginal ring of nematocysts, 6–11 bifid tentacles with lower branches longer than their upper counterpart, the cnidome with stenoteles of two size classes, and two nematocyst clusters on the upper branch supplementing the apical one, opposite placed alternately on its aboral and oral sides permits to differentiate S. dzilamensis from its congeners. A taxonomic key for the species of Staurocladia is provided.
Eine finalisierte Fassung des Beitrags wird 2024 in einem von Burchard/Schmitt-Leonardy/Singelnstein/Zabel herausgegebenen Sammelband („Alternativen zum Strafrecht“) erscheinen.
Im Zentrum des Beitrags steht jedoch nicht der Versuch, positiv Alternativen zum oder im Strafrecht zu formulieren. Vielmehr ist der Begriff der Alternativlosigkeit erkenntnisleitend, konkret die Identifizierung gesellschaftlich-politischer Wirkmächte und innerstrafrechtlicher Deutungsmuster, die eine (auch) strafrechtliche Bewältigung der durch den menschengemachten Klimawandel aufgeworfenen Konflikte alternativlos erscheinen lassen können.
Dazu wird die jüngst aufgekommene Debatte um ein Klimaschutzstrafrecht aus einer zukunftssoziologischen und strafrechtswissenschaftlichen Perspektive analysiert. Im Zentrum des Beitrags steht die These, dass sich gerade die Verbindung von katastrophischen Zukunftsvorstellungen – hier erschlossen über den zukunftssoziologischen Schlüsselbegriff der Imagination und deskriptiv-analytisch als „Klimakatastrophismus“ bezeichnet – und Exzeptionalisierungen des Strafrechts als Treiber in die imaginative Sackgasse der Alternativlosigkeit erweist.
Die verdichtete Imagination, das die Zukunfts eine Katastrophe sei („Klimakatastrophismus“), befördert als ein an Boden gewinnendes kollektives Deutungsmuster eine intensivierte Sozialkontrolle und Punitivität.
Der kriminalpolitisch expansive Kurs einer mit radikalisierten Selbsterhaltungsfragen konfrontierten Gesellschaft scheint in gesellschaftlich wie dogmatisch tief verankerten Exzeptionalisierungen des Strafrechts – wie der Zuschreibung, (nur) strafwürdige Sozialschädlichkeit adressieren zu dürfen, dies aufgrund einer regulativen und expressiven Ausnahmestellung aber auch in besonderer Weise zu können (oder zu müssen) – durchaus Widerhall zu finden. Dadurch entsteht ein strafrechtsexpansives (weil rechtfertigendes) Momentum, das der ohnehin in der Herausbildung begriffenen Legalisierung eines Klimaschutzstrafrechts Vorschub leistet.
Es entspricht den vornehmen Aufgaben der Strafrechtswissenschaft, diesen Entwicklungen prospektiv vorauszugreifen, sie aufzuklären und kritisch zu wenden – gerade im Hinblick auf die Gegenläufigkeit und Brüchigkeit gesellschaftlicher Entwicklungen oder die Kontingenz eines als politisch gelesenen Strafrechts. Eine kritische Strafrechtswissenschaft darf sich dabei nicht allein, allemal nicht unreflektiert auf tradierte Formen der Strafrechtsbegrenzung zurückziehen.
Die Verfassungsgeschichte der Bundesrepublik Deutschland beginnt in Frankfurt: Am 1. Juli vor 75 Jahren haben die Militärgouverneure der drei Westmächte im Eisenhower-Saal des I.G. Farben-Haus (heute Campus Westend) drei Urkunden übergeben. Diese »Frankfurter Dokumente« enthielten den Auftrag, eine Verfassung für das künftige Deutschland zu erarbeiten.
Um schnelleres Handeln in Sachen Klimaschutz zu erzwingen, kleben sich Aktivisten der »Letzten Generation« auf der Straße fest, werfen Suppe auf Kunstwerke und versuchen, ihre Ziele durch einen Hungerstreik zu erzwingen. Wie weit darf »ziviler Ungehorsam« gehen, ohne die Rechtsordnung zu gefährden? Darüber sprach Dirk Frank mit Samira Akbarian und Uwe Volkmann, die beide zum
Öffentlichen Recht forschen.
Although initially described as a subgenus of Copris Geoffroy, 1762, Homocopris had long been treated as a junior synonym of Dichotomius Hope, 1838 (Martínez 1951) until it was reclassified as a distinct genus (Vaz-de-Mello et al. 2010). Herein, we revisit the taxonomy of Homocopris. In doing so: we describe two new species previously considered to represent the Brazilian population of Homocopris torulosus (Eschscholtz, 1822); revalidate Pinotus punctatissimus from synonymy under Homocopris torulosus and place it in Homocopris as had previously been done only informally (González et al. 2015; Rebolledo et al. 2017); recognize two new synonymies; and describe a new genus, Andinocopris gen. nov., which includes two former members of Homocopris. Presently, Homocopris includes four species: H. torulosus, H. punctatissimus (Curtis, 1845) comb. nov., H. grossiorum sp. nov. and H. williami sp. nov. Andinocopris includes A. achamas (Harold, 1867) gen. et comb. nov. and A. buckleyi (Waterhouse, 1891) gen. et comb. nov. Pinotus simulator Luederwaldt, 1936 is here considered a new junior synonym of Andinocopris buckleyi. An identification key to members of both genera is provided as well as images of diagnostic characters for all species. Finally, we discuss the placement of Andinocopris and Homocopris within Scarabaeinae and propose a new tribe, Homocoprini tribe nov., to include both genera.
The genus Neocranaus Roewer, 1913 is revisited, its composition is expanded from two to five species and a new generic diagnosis is presented. Neocranaus albiconspersus Roewer, 1913, type species of the genus, is redescribed. The genus Tolimaius Roewer, 1915 syn. nov. is considered as a junior subjective synonym of Neocranaus, its sole member being transferred to Neocranaus – N. pectinitibialis (Roewer, 1915) comb. nov. – and redescribed here. The new combination Neocranaus laevifrons (Roewer, 1917) comb. nov. is proposed for Holocranaus laevifrons Roewer, 1917. The new species Neocranaus gladius Villarreal & Kury sp. nov. is described, from P.N.N. Yariguíes, Santander Department, Colombia. For the first time, the genital structure of this genus is illustrated. A key to the identification of the males of Neocranaus and some considerations about the reproductive biology of N. albiconspersus and N. pectinitibialis are presented.
Empty shells (thanatocoenoses) have been reviewed of species in the genus Granulina (Gastropoda: Granulinidae) from the lower shelf and upper bathyal zones off Mauritania and Western Sahara. We encountered nine species of which four were already known from off Mauritania. Four new species are proposed herein: Granulina reginae sp. nov., G. ronaldi sp. nov., G. sandrae sp. nov. and G. sigridae sp. nov. These four sympatric new species lack labial denticles and they probably form a phyletic clade with a common ancestor. Most hitherto known species in Granulina from the NE Atlantic Ocean and the Mediterranean possess labial denticles. One additional new species with denticles was left in open nomenclature because the material available was considered inadequate. Species in Granulina from Mauritania and Western Sahara have not been found off NW Morocco or the Canary Islands, and the species known from NW Morocco and the Canary Islands have not been found off Mauritania and Western Sahara. The southern extents of the distributions of the Mauritanian species are currently uncertain as additional sampling would be required off Senegal or further South. A key to Mauritanian species in Granulina is given.
A comprehensive review of the enigmatic genus Masona van Achterberg is provided. Two new species are described from the USA: Masona neon Dal Pos & Martens sp. nov. from Puerto Rico, and Masona wow Dal Pos & Martens sp. nov. from California. A key to the world species of Masona is presented, together with a discussion of the morphology of the genus and an annotated catalogue of the species. [Masona] timpaynei Quicke, 2019, is excluded from Braconidae and placed as incertae sedis in the Ichneumonidae, subfamily Neorhacodinae.
The vetigastropod material collected on Walters Shoal during Cruise MD208 of the Tropical Deep-Sea Benthos programme is documented. In total, 50 species were obtained, 30 of which are new and apparently endemic to the seamount. Of the other 20 species, eight are regionally endemic to the south-western Indian Ocean, 11 are more widely distributed in the Indo-West Pacific and one is possibly of deep-water Atlantic origin. The primary affinities of the fauna are with warm temperate South Africa and the tropical western Indian Ocean, but one species is potentially a seamount endemic of southern affinity. A new pseudococculinid genus living on decomposing bird feathers is described, a biogenic substrate association previously unknown in the Mollusca. The following new genera are described: Imbricoscelis gen. nov. and Pterodacna gen. nov. The following new species are described: Akritogyra crenulata sp. nov., Bathymophila williamsae sp. nov., Benthobrookula araneum sp. nov., Be. galeneae sp. nov., Be. laticostata sp. nov., Be. scalaroides sp. nov., Be. semisculpta sp. nov., Bruceina areneformis sp. nov., Calliostoma pantopunctatum sp. nov., Cantrainea herosae sp. nov., Carinastele achrosta sp. nov., Cornisepta marshalli sp. nov., Emarginula lentiginosa sp. nov., E. nodulicostata sp. nov., E. retrogyra sp. nov., E. salebrosa sp. nov., Fluxinella dufresneae sp. nov., Gibbula roseosticta sp. nov., Hadroconus scobina sp. nov., Kaiparathina monticola sp. nov., Lissotesta wareni sp. nov., Microcollonia miniata sp. nov., Mikro crassus sp. nov., Parviturbo cicatricosus sp. nov., Phragmomphalina candida sp. nov., Pterodacna boucheti gen. et sp. nov., Solariella asaphea sp. nov., Spinicalliotropis lepidota sp. nov., Stomatella multilirata sp. nov. and Trenchia mcleani sp. nov. The following new combinations are proposed: Brookula coronis Barnard, 1963 is transferred to Imbricoscelis gen. nov., Cantharidus nolfi Poppe, Tagaro & H. Dekker, 2006 is transferred to Kaiparathina Laws, 1941 and Solariella incisura Melvill, 1909 is transferred to Phragmomphalina Herbert & Williams, 2020. The following new synonyms are proposed: Carinastele wareni Vilvens, 2014 is a synonym of Bruceina cognata (Marshall, 1988); Fluxinella stellaris Bozzetti, 2008 is a synonym of Agagus stellamaris Herbert, 1991.
Twenty-one species of the genus Lecithocera Herrich-Schäffer, 1853 from China are described as new: L. angustifolia sp. nov., L. asticta sp. nov., L. balteiformis sp. nov., L. bicornuta sp. nov., L. bigeminata sp. nov., L. duplicispinea sp. nov., L. flavalba sp. nov., L. flavistriata sp. nov., L. furvibasis sp. nov., L. laticuculla sp. nov., L. ligulacea sp. nov., L. margirecta sp. nov., L. medogensis sp. nov., L. nullisigna sp. nov., L. parviflava sp. nov., L. parvispinea sp. nov., L. serratiloba sp. nov., L. sichuanensis sp. nov., L. tenuextrema sp. nov., L. tumicuculla sp. nov. and L. yunnanensis sp. nov. Seven species are newly recorded for China: L. alpestra Park, 2005, L. alpina Park, 2016, L. chersitis Meyrick, 1918, L. haviensis Park, 2016, L. neosticta Meyrick, 1918, L. orbiculata Park, 2010 and L. rubigona Park, 2006. The females of four species are described for the first time: L. alpina, L. haviensis, L. neosticta and L. orbiculata. Six new combinations are proposed: Lecithocera platomona (Wu, 1997) comb. nov. and L. stimulata (Wu, 1994) comb. nov. transferred from the genus Quassitagma; L. frisilina (Gozmány, 1978) comb. nov. transferred from the genus Recontracta; L. baliocata (Wu, 1994) comb. nov., L. sarmenta (Wu, 1994) comb. nov. and L. stictata (Wu, 1994) comb. nov. transferred from the genus Galoxestis. Images of adults and genitalia for all treated species are given, along with a checklist of all Chinese species of Lecithocera.
Sipuncula are marine unsegmented worms that can be found in benthic habitats, from shallow to deep-sea waters. In Mexico these worms have been scarcely studied. Among nine studies in the entire Mexican Pacific coasts, seven are from the central and northwestern Mexican Pacific. For over 80 years, only 24 species have been recorded. To improve the knowledge of the sipunculans from the central and northwestern Mexican Pacific, 501 specimens from three scientific collections of Mexico were revised. The specimens were collected by diverse methods from intertidal, subtidal, and bathyal depths (~1000 m), from 27 locations along the central and northwestern Mexican Pacific. Sixteen taxa belonging to nine genera and five families were identified. One species is recorded for the first time in the Mexican Pacific and five new species are described, one from intertidal and shallow subtidal depths: Phascolosoma (Phascolosoma) azteca sp. nov.; two from subtidal depths: Phascolion (Lesenka) salgadoi sp. nov. and Sipunculus (Sipunculus) bastidai sp. nov.; and two from bathyal depths: Apionsoma (Apionsoma) silviae sp. nov. and Apionsoma (Edmondsius) hendrickxi sp. nov.
Five new and four known species of the genus Dorylaimellus Cobb, 1913 are described and illustrated from the Western Ghats of India. Dorylaimellus attenuatus sp. nov. has a 0.73–0.84 mm long body; lip region rounded, offset; odontostyle attenuated with indistinct lumen, odontophore 9–10 µm long; expanded part of pharynx 39–48% of neck length; female genital system amphidelphic and tail long filiform. Dorylaimellus cylindricaudatus sp. nov. has a 1.0–1.15 mm long body; lip region rounded, offset; odontostyle 4 µm long, odontophore 11–12 µm long; expanded part of pharynx 47–56% of neck length; female genital system amphidelphic, and tail elongate-cylindrical with rounded terminus. Dorylaimellus karnatakensis sp. nov. has a 1.2–1.3 mm long body; lip region rounded, offset; odontostyle 5 µm long, odontophore 12–13 µm long; expanded part of pharynx 45–53% of neck length; female genital system amphidelphic; spicules 22 µm long, ventromedian supplements four, and tail elongate-conoid dorsally convex. Dorylaimellus kasplateauensis sp. nov. has a 0.68–0.83 mm long body, lip region with a weak perioral disc; odontostyle 6–7 µm long, odontophore 11–14 µm long; expanded part of pharynx 38–43% of neck length; female genital system amphidelphic, and tail elongate arcuate conoid. Dorylaimellus tropicus sp. nov. has a 0.6–0.7 mm long body; lip region rounded, offset; odontostyle 4–5 µm long, odontophore 8–10 µm long; hemizonid present; expanded part of pharynx 43–52% of neck length; female genital system amphidelphic and tail elongate-filiform, sudden tapering, ending with rounded tip. Dorylaimellus andrassyi, D. discocephalus, D. belondirelloides, D. chakpilus are redescribed based on the specimens collected from several localities of the Western Ghats.
Sarinda sombraluminosa Hagopián, Laborda & Simó sp. nov. and Sarinda contraluz Hagopián & Bustamante sp. nov. are described from Uruguay based on males and females. New records of Parafluda banksi Chickering, 1946 and Sarinda marcosi Piza, 1937 for the country are provided. Illustrations and electron micrographs of sexual characters, photographs of alive specimens, natural history data and a distribution map of species of Sarandini from Uruguay are provided.
Oceanic islands harbor a unique and distinct fauna and flora, usually isolated by distance and the deep sea, making them fascinating environments to study. Despite their importance, taxonomic accounts from Brazilian oceanic islands have only recently begun to focus on important groups such as the Syllidae family. In this article, we present detailed descriptions and illustrations of two new species, Brevicirrosyllis paulolanai sp. nov. from Trindade Islands, and Westheidesyllis splendida sp. nov. from Rocas Atoll. These two species belong to genera currently of uncertain affinities within the family, in both cases previously included in the Eusyllinae subfamily. Moreover, we provide updated identification keys for both genera to facilitate their future identification.
The genus Armillipora Quate is recorded for the first time in Ecuador, with a new geographical record for Armillipora selvica Quate, 1996 and the descriptions of two new species, namely Armillipora muyu sp. nov. and Armillipora imitata sp. nov., doubling the total number of species in the genus. In addition, we make available the first DNA barcodes for the genus, providing a sequence of the 5´-end of the cytochrome c oxidase subunit I (COI) gene for A. imitata, A. muyu, and, A. selvica. Moreover, we describe the second known female of the genus and we provide a taxonomical key for the known males of the world. Finally, we build Species Distribution Models and discuss the potential distribution of the genus in the Neotropical region.