bluuebunny/crossref_metadata_2025_split huggingface dataset:
The trouble with trilobites: classification, phylogeny and the cryptogenesis problem
Authors: Paterson John R. 
Published: June 2019

AbstractTrilobites are an iconic group of extinct arthropods that lived in Palaeozoic oceans forc. 270 Ma, before their demise at the end of the Permian Period. Despite their considerable diversity (> 22 000 species) and abundance, particularly in Cambrian and Ordovician rocks, as well as intensive study for well over 200 years, trilobite systematics remains in a state of flux. In this contribution, the complex history of trilobite classification over the last century is briefly reviewed, including the seminal scheme published by Henry Swinnerton in 1915. The cryptogenesis problem, which relates to the supposedly obscure phylogenetic links between major post-Cambrian trilobite clades and their Cambrian sister taxa, is also discussed. Previous studies have suggested that the cryptogenesis problem is largely a taxonomic artefact, but the Cambrian origins of some post-Cambrian groups, such as the orders Proetida and Odontopleurida, are still unclear. Future directions for research on trilobite systematics are outlined, from taxonomic studies involving comprehensive documentation and extensive illustration of morphology at the species level, through to broad-scale phylogenetic analyses that initiate or test hypotheses about relationships across the major groups. Other ongoing issues to be addressed include identifying the sister group of Trilobita, and determining whether certain taxa, such as the suborder Agnostina and Cambrian family Burlingiidae, represent trilobites.
Use of fresh water by an estuarine-resident marine catfish: evidence from gonadal and otolith chemistry analyses
Authors: Condini Mario V. , Pereyra Paula E. R. , Garcia Alexandre M. , Saint'pierre Tatiana D. , Ceni Gianfranco , Lugo Rafael , Fontoura Nelson F. , Vieira João P. , Albuquerque Cristiano Q. 
Published: June 2019

AbstractIn this study, we examine how the Guri catfish Genidens genidens uses estuarine and freshwater habitats along the largest South American coastal lagoon, through the chemical analysis of otoliths and microscopic analysis of gonads. Chemical composition (Sr:Ca) of otolith edges allowed distinguishing between individuals who used the estuarine or freshwater compartments of the lagoon. The analysis of core-to-edge chemical profiles of each individual otolith revealed that the population may present two different patterns of habitat use along the lagoon. The ‘type 1’ pattern (89.5%) includes fish who appear to have been born in estuarine waters, whereas ‘type 2’ (9.5%) includes those fish born in fresh water. Nevertheless, juveniles from both patterns appear to migrate to estuarine waters. The gonad analysis shows G. genidens may reproduce in fresh water, as nearly 57% of all sampled fish were found to spawn in the freshwater portion of the lagoon. Also, the otolith core of many adult fish presented freshwater signatures, thus suggesting consistent fresh water use during early life. Our findings based on otolith and gonadal analyses challenge the previous classification of G. genidens as an estuarine resident. Rather, our results allow the suggestion that this species should be placed in the ‘estuarine and fresh water’ guild, which includes both fish completing their life cycles within the estuary and fish who consistently use freshwater habitats.
Existential Conservatism
Authors: McPherson David 
Published: June 2019

AbstractThis essay articulates a kind of conservatism that it argues is the most fundamental and important kind of conservatism, viz. existential conservatism, which involves an affirmative and appreciative stance towards the given world. While this form of conservatism can be connected to political conservatism, as seen with Roger Scruton, it need not be, as seen with G. A. Cohen. It is argued that existential conservatism should be embraced whether or not one embraces political conservatism, though it is also shown that existential conservatism imposes constraints on our political thinking. In particular, it is argued that Cohen's ‘luck egalitarianism’ stands at odds with his existential conservatism and that one should be a sufficientarian rather than an egalitarian with regard to economic justice.
Characteristics of persons who die on their first suicide attempt: results from the National Violent Death Reporting System
Authors: Jordan Joshua T. , McNiel Dale E. 
Published: June 2019

AbstractBackgroundMuch of suicide research focuses on suicide attempt (SA) survivors. Given that more than half of the suicide decedent population dies on their first attempt, this means a significant proportion of the population that dies by suicide is overlooked in research. Little is known about persons who die by suicide on their first attempt–and characterizing this understudied population may improve efforts to identify more individuals at risk for suicide.MethodsData were derived from the National Violent Death Reporting System, from 2005 to 2013. Suicide cases were included if they were 18–89 years old, with a known circumstance leading to their death based on law enforcement and/or medical examiner reports. Decedents with and without a history of SA were compared on demographic, clinical, and suicide characteristics, and circumstances that contributed to their suicide.ResultsA total of 73 490 cases met criteria, and 57 920 (79%) died on their first SA. First attempt decedents were more likely to be male, married, African-American, and over 64. Demographic-adjusted models showed that first attempt decedents were more likely to use highly lethal methods, less likely to have a known mental health problem or to have disclosed their intent to others, and more likely to die in the context of physical health or criminal/legal problem.ConclusionsFirst attempt suicide decedents are demographically different from decedents with a history of SA, are more likely to use lethal methods and are more likely to die in the context of specific stressful life circumstances.
Stability and change at Çadır Höyük in central Anatolia: a case of Late Chalcolithic globalisation?
Authors: Steadman Sharon R. , McMahon Gregory , Arbuckle Benjamin S. , von Baeyer Madelynn , Smith Alexia , Yıldırım Burcu , Hackley Laurel D. , Selover Stephanie , Spagni Stefano 
Published: June 2019

AbstractScholars have recently investigated the efficacy of applying globalisation models to ancient cultures such as the fourth-millennium BC Mesopotamian Uruk system. Embedded within globalisation models is the ‘complex connectivity‘ that brings disparate regions together into a singular world. In the fourth millennium BC, the site of Çadır Höyük on the north-central Anatolian plateau experienced dramatic changes in its material culture and architectural assemblages, which in turn reflect new socio-economic, sociopolitical and ritual patterns at this rural agro-pastoral settlement. This study examines the complex connectivities of the ancient Uruk system, encompassing settlements in more consistent contact with the Uruk system such as Arslantepe in southeastern Anatolia, and how these may have fostered exchange networks that reached far beyond the Uruk ‘global world‘ and onto the Anatolian plateau.
An insight into Old Hittite metallurgy: alloying practices at Hüseyindede (Çorum, Turkey)
Authors: Dardeniz Gonca , Sipahi İ. Tunç , Yıldırım Tayfun 
Published: June 2019

AbstractThis paper presents archaeological and analytical data on metal artefacts from Hüseyindede (Çorum, Turkey), dated to the Old Hittite period (ca 16th century BC). Hüseyindede, which is set in a rural landscape, demonstrates continuity in alloying traditions from the Early Bronze Age III (ca 26th/25th–22nd/21st century BC) and the Assyrian Trading Colonies period (20th–18th century BC) to the emergence of the Hittites. In addition to known alloying practices of the period, the site presents, for the first time, evidence of the existence of copper-nickel alloys, namely cupronickels, which so far have been documented only at the Late Bronze Age capital of the Hittites, Boğazköy/Hattuša. The Hüseyindede cupronickel objects now pinpoint the presence of this technology to regions spreading out from the Halys basin from the Old Kingdom Hittite period.
The impact of wealth and income on the depression of older adults across European welfare regimes
Authors: Kourouklis Dimitrios , Verropoulou Georgia , Tsimbos Cleon 
Published: June 2019

AbstractThis paper examines the impact of wealth and income on the likelihood of depression among persons aged 50 or higher in four European regions characterised by differences in the standards of living and welfare systems. To address possible effects, data from Wave 6 of the Survey of Health, Ageing and Retirement in Europe (SHARE) have been used. Based on a sample of 60,864 persons resident in 16 European countries and a binary indicator of depression, probit and instrumental variable probit models were employed, the latter of which deal with issues of endogeneity and omitted variable bias. The findings show differences in the prevalence of depression across Europe, favouring the more affluent North/Western countries. Further, there is a difference in the role and the magnitude of the effect of income and wealth across different regions. First, though both measures exhibit a measurable effect, their impact is greater in the poorer Central/Eastern and Southern regions; this divide is more pronounced for wealth. Second, income seems to have a stronger effect compared to wealth in all instances: hence, it would seem that liquidity is more important among Europeans aged 50 or higher than assets. Nevertheless, neither income nor wealth are important among persons aged 65 or higher in Nordic countries which may be partly attributable to a more equitable welfare system.
Synergistic effect of basic fibroblast growth factor (bFGF) and epidermal growth factor on derivation of camel (Camelus dromedarius) trophoblast stem cells
Authors: Alzahrani Faisal A. 
Published: June 2019

SummaryThis study aimed to optimize the derivation of trophectoderm from in vitro-produced camel embryos under feeder-free culture conditions using the basement membrane matrix Matrigel. Trophoblastic vesicles were obtained through mechanical microdissection of in vitro-produced camel (Camelus dromedarius) embryos. Supplementing the culture medium with 10 ng/ml of epidermal growth factor and 10 ng/ml fibroblast growth factor improved the attachment and subsequent outgrowths of cultured trophoblastic vesicles when compared with the control group and the groups supplemented individually with each growth factor. The expression levels of pluripotency genes octamer-binding transcription factor 4 (Oct4), sex determining region Y-box 2 (Sox2), myelocytomatosis proto-oncogene (c-Myc) and anti-apoptotic gene B-cell lymphoma 2 (Bcl2) were increased in trophoblastic vesicles supplemented with both growth factors when compared with the control group. Conversely, both growth factors decreased the expression of apoptotic genes tumour protein p53 (p53) and Bcl-2-associated X protein (Bax). To the best of our knowledge, this may be the first report describing the derivation of trophoblast stem cells from in vitro-produced camel embryos.
Effect of anaemia on the diagnosis of rheumatic heart disease using World Heart Federation criteria
Authors: Klein Jennifer H. , Beaton Andrea , Tompsett Alison , Wiggs Justin , Sable Craig 
Published: June 2019

AbstractBackground:There is overlap between pathological mitral regurgitation seen in borderline rheumatic heart disease using World Heart Federation echocardiography criteria and physiologic regurgitation found in normal children. One possible contributing factor is higher rates of anaemia in endemic countries.Objective:To investigate the contribution of anaemia as a potential confounder in the diagnosis of rheumatic heart disease detected in echocardiographic screening.Method/Design:A novel Server 2012 data warehouse tool was used to incorporate haematology and echocardiography databases. The study included a convenience sample of patients from 5 to 18 years old without structural or functional heart disease that had a haemoglobin value within 1 month prior to an echocardiogram. Echocardiogram images were reviewed to determine presence or absence of World Heart Federation criteria for rheumatic heart disease. The rate of rheumatic heart disease among anaemic and non-anaemic children according to gender- and age-based norms groups was compared.Results:Of the 935 patients who met the study inclusion criteria, 406 were classified as anaemic. There was no difference in the rate of echocardiograms meeting criteria for borderline rheumatic heart disease in anaemic (2.0%, 95% CI 0.6–3.3%) and non-anaemic children (1.3%, 95% CI 0.3–2.3%). However, there was a statistically significant increase in rates of mitral regurgitation of unclear significance among anaemic versus non-anaemic patients (8.6 versus 3.6%; p = 0.0012).Conclusion:Anaemia does not increase the likelihood of meeting echocardiographic criteria for borderline rheumatic heart disease. Future studies should evaluate for the correlation between anaemia and mitral regurgitation in endemic settings.
Evaluation of long-term cardiac side effects of anthracycline chemotherapy by conventional and non-conventional echocardiographic methods in childhood cancer survivors
Authors: Yoldaş Tamer , Yeşil Şule , Karademir Selmin , Şahin Gürses , Arman Örün Utku , Doğan Vehbi , Özgür Senem 
Published: June 2019

AbstractObjective:Anthracycline chemotherapeutic agents carry the well-recognised risk of cardiac toxicity. The aim of this study was to determine the long-term effect of anthracycline chemotherapy on the biventricular function in childhood cancer survivors using tissue Doppler imaging and two-dimensional speckle tracking echocardiography.Patients and Methods:The study included 45 survivors of childhood cancers and 50 healthy age-matched control patients. Cardiac function was prospectively studied with conventional echocardiography, tissue Doppler imaging, and speckle tracking echocardiography after completion of treatment. The same analysis was performed on matched controls.Results:There was no difference in age, gender, height, and weight between the study and control groups. The mean anthracycline dose was 240 ± 106 mg/m2 and the mean remission duration was 8.2 ± 5 years (1–20 years) in the study group. Conventional echocardiography showed similar ejection fraction, shortening fraction, and left ventricle end-diastolic diameter in both groups. Mitral lateral and septal tissue Doppler imaging showed normal but according to control group relatively sub-normal systolic and diastolic function in patient group. The global longitudinal and circumferential strain and strain rates were significantly lower in the patient group compared to control group. Correlation analysis revealed a negative and significant correlation between total anthracycline dose and global longitudinal and circumferential strain and strain rates.Conclusion:Sub-clinical systolic and diastolic dysfunction may not be detected by conventional echocardiographic methods which are frequently used in daily practice. Sub-clinical systolic and diastolic dysfunction may be detected more sensitively by echocardiographic method such as speckle tracking echocardiography in childhood cancer survivors.
A word of caution: diabolic behaviour of AndraStents®: inflation of supporting balloon leads to “diabolo”-misconfiguration of the stent
Authors: Happel Christoph M. , Zunzunegui Martínez Jose L. , del Cerro María Jesús , Schranz Dietmar , Khalil Markus , Ballesteros Fernando , Pardeiro César Abelleira , Bertram Harald , Beerbaum Philipp , Haas Nikolaus A. 
Published: June 2019

AbstractAims:Transcatheter implantation of pulmonary balloon-expandable stent-valves requires pre-stenting of the right ventricular outflow tract with large calibre stents. To increase awareness of the associated risks of this part of transcatheter pulmonary valve replacement therapy, we report potential fatal complications during the implantation of AndraStents® in the right ventricular outflow tract in six cases from five different European institutions and their management.Method and result:We present a retrospective case series analysis looking at the time period from 2013 to 2018. Of 127 AndraStents® implanted in the right ventricular outflow tract, in six patients, age from 13 to 71 years, a misconfiguration of the AndraStent® occurred forming a “diabolo”-configuration. During inflation of the balloon, the stent showed extreme “dog-boning”, an expansion of the stent at both ends with the middle part remaining unexpanded. This led to rupture of the balloon and loss of manoeuvrability in four patients. Out of the total six cases, in four patients the stent was eventually expanded with high-pressure balloons, and in one case the stent was surgically retrieved. In one patient, in whom a percutaneous retrieval of the embolised stent was attempted, a fatal bleeding occurred.Conclusions:Pre-stenting of the right ventricular outflow tract by AndraStents® can lead to misconfiguration of the stent with potentially fatal complications. Rescue strategies of misconfigured stents include stent inflation and placement with high pressure non-compliant balloons or surgical backup. Interventional retrieval measures of AndraStents® cannot be advised.
The Consequences of Quotas: Assessing the Effect of Varied Gender Quotas on Legislator Experience in the European Parliament
Authors: Aldrich Andrea S. , Daniel William T. 
Published: June 2019

AbstractThis article explores the consequences of quotas on the level of diversity observed in legislators’ professional and political experience. We examine how party system and electoral system features that are meant to favor female representation, such as gender quotas for candidate selection or placement mandates on electoral lists, affect the composition of legislatures by altering the mix of professional and political qualifications held by its members. Using data collected for all legislators initially seated to the current session of the European Parliament, one of the largest and most diverse democratically elected legislatures in the world, we find that quotas eliminate gendered differences in experience within the institution, particularly when used in conjunction with placement mandates that ensure female candidates are featured on electoral lists in viable positions. Electoral institutions can generally help to “level the playing field” between the backgrounds of men and women in elected office while increasing the presence of desirable qualities among European Parliament representatives of both genders.
Fairness, accountability and transparency:
notes on algorithmic decision-making in criminal
justice
Authors: Chiao Vincent 
Published: June 2019

AbstractOver the last few years, legal scholars, policy-makers,
activists and others have generated a vast and
rapidly expanding literature concerning the ethical
ramifications of using artificial intelligence,
machine learning, big data and predictive software
in criminal justice contexts. These concerns can be
clustered under the headings of fairness,
accountability and transparency. First, can we trust
technology to be fair, especially given that the
data on which the technology is based are biased in
various ways? Second, whom can we blame if the
technology goes wrong, as it inevitably will on
occasion? Finally, does it matter if we do not know
how an algorithm works or, relatedly, cannot
understand how it reached its decision? I argue
that, while these are serious concerns, they are not
irresolvable. More importantly, the very same
concerns of fairness, accountability and
transparency apply, with even greater urgency, to
existing modes of decision-making in criminal
justice. The question, hence, is comparative: can
algorithmic modes of decision-making improve upon
the status quo in criminal justice? There is
unlikely to be a categorical answer to this
question, although there are some reasons for
cautious optimism.
Policing the smart city
Authors: Joh Elizabeth E. 
Published: June 2019

AbstractWhat will be the consequences for policing as cities become increasingly ‘smarter’? The emerging questions about policing and the smart city have thus far focused primarily on the increased surveillance capacity that a highly networked urban setting provides for law enforcement. More cameras and sensors will mean more watching and less freedom from being watched. The perception of ubiquitous government surveillance might quell dissent and inhibit free expression. As a result, concerns about policing and the smart city echo other responses to surveillance technologies. This essay proposes a different analysis: as cities become ‘smarter’, they increasingly embed policing itself into the urban infrastructure. Policing is inherent to the smart city.
Regulating terrorist content on social media: automation and the rule of law
Authors: Macdonald Stuart , Correia Sara Giro , Watkin Amy-Louise 
Published: June 2019

AbstractSocial-media companies make extensive use of artificial intelligence in their efforts to remove and block terrorist content from their platforms. This paper begins by arguing that, since such efforts amount to an attempt to channel human conduct, they should be regarded as a form of regulation that is subject to rule-of-law principles. The paper then discusses three sets of rule-of-law issues. The first set concerns enforceability. Here, the paper highlights the displacement effects that have resulted from the automated removal and blocking of terrorist content and argues that regard must be had to the whole social-media ecology, as well as to jihadist groups other than the so-called Islamic State and other forms of violent extremism. Since rulebylaw is only a necessary, and not a sufficient, condition for compliance with rule-of-law values, the paper then goes on to examine two further sets of issues: the clarity with which social-media companies define terrorist content and the adequacy of the processes by which a user may appeal against an account suspension or the blocking or removal of content. The paper concludes by identifying a range of research questions that emerge from the discussion and that together form a promising and timely research agenda to which legal scholarship has much to contribute.