bluuebunny/crossref_metadata_2025_split huggingface dataset:
New ultracool dwarf neighbours within 20 pc fromGaiaDR2
Authors: Scholz R.-D. 
Published: March 2020

Aims.TheGaiadata release 2 (DR2) contains > 6000 objects with parallaxes (Plx + 3 × e_Plx) > 50 mas, placing them within 20 pc from the Sun. Because the expected numbers based on extrapolating the well-known 10 pc census are much lower, nearbyGaiastars need a quality assessment. The 20 pc sample of white dwarfs (WDs) has been verified and completed withGaiaDR2. We here confirm and complete the 20 pc sample of ultracool dwarfs (UCDs) with spectral types ≳M7 and givenGaiaDR2 parallaxes.Methods.Dividing theGaiaDR2 20 pc sample into subsamples of various astrometric and photometric quality, we studied their distribution on the sky, in theMGversusG − RPcolour-magnitude diagram (CMD), and as a function ofGmagnitude and total proper motion. After excluding 139 known WDs and 263 known UCDs from the CMD, we checked all remaining ≈3500 candidates withMG >  14 mag (used to define UCDs in this study) for the correctness of theirGaiaDR2 proper motions by visual inspection of finder charts, comparison with proper motion catalogues, and comparison with our own proper motion measurements. For confirmed UCD candidates we estimated spectral types photometrically usingGaiaand near-infrared absolute magnitudes and colours.Results.We failed to confirm new WDs, but found 50 new UCD candidates that are not mentioned in three previous studies usingGaiaDR2. They have relatively small proper motions and low tangential velocities and are concentrated towards the Galactic plane. Half of them have spectral types in SIMBAD and/or previous non-Gaiadistance estimates that placed them already within 20 pc. For 20 of the 50 objects, we estimated photometric spectral types of M6−M6.5, slightly below the classical UCD spectral type limit. However, seven L4.5−L6.5, four L0−L1, five M8.5−M9.5, and three M7−M8 dwarfs can be considered as completely new UCDs discoveries within 20 pc based onGaiaDR2. Four M6.5 and two L4.5 dwarfs have high membership probabilities (64%−99%) in the ARGUS, AB Doradus, or Carina Near young moving groups.
Innere Bilder in der Arzt-Patienten-Beziehung
Authors: Hauler Barbara 
Published: March 2020

ZusammenfassungInnere Bilder tauchen oft spontan im Gespräch zwischen Patient und Arzt auf. Der Beitrag möchte vermitteln, wie diese Bilder das Kommunikationsgeschehen bereichern. Sie können zu Imaginationen weiter entwickelt werden, die das Verständnis der Arzt-Patienten-Beziehung und des Krankheitsgeschehens vertiefen.
Intraoperative Neurophysiologic Monitoring Correlates with Neurologic Outcome After Endovascular and Surgical Treatment of a Cervical Arteriovenous Malformation
Authors: Sánchez Roldán M. Angeles , Tellez Maria J. , Mora Francisco , Ghatan Saadi , Roonprapunt Chanland , Ulkatan Sedat 
Published: March 2020

Abstract
Background The treatment of spinal intramedullary arteriovenous malformations (AVMs) presents the risk of spinal cord ischemia because of the vascular nidus and their feeding arteries involving and supplying the spinal cord parenchyma. The multimodal approach includes endovascular embolization and microsurgical excision, both benefiting from intraoperative neurophysiologic monitoring. We present a case study of a patient who underwent several staged embolizations and open surgery for microsurgical excision.
Patient A 32-year-old man who presented with a recurrent glomus-type intramedullary AVM in the cervical spinal cord, located at the C5–C6 segment, with progressive neurologic deterioration.
Methods Somatosensory evoked potentials (SEPs) and transcranial motor evoked potentials (MEPs) were performed during three embolizations, a provocative test, and surgery, in addition to D-wave during microsurgical excision.
Results Abolished hand MEP and drop in SEP during a provocative test guided the surgeon to embolize from a safer vessel with no acute neurologic deficit after three embolizations. Before surgery, an angiography showed the left posterior spinal artery supplying the AVM. After resecting the vascular nidus from the spinal parenchyma, left-hand MEP decreased in amplitude and later abolished, and SEP decreased. Interestingly, no D-wave or distal MEPs were affected. Weakness in the left hand immediately and 2 weeks postoperatively advocates for metameric spinal cord ischemia with preservation of long spinal cord pathways.
Conclusions Intraoperative neurophysiologic monitoring correlates with neurologic outcome after endovascular and surgical treatment of a cervical AVM. Intraoperative monitoring provides continuous functional information of long and metameric spinal cord pathways, which is critical when deciding on the vessel to be embolized and during microsurgical excision where the surgeon is in less control of the AVM hemodynamic flow.
Case Report of Cerebellar Endometriosis
Authors: Meggyesy Michael , Friese Michael , Gottschalk Joachim , Kehler Uwe 
Published: March 2020

AbstractEndometriosis is a disorder in women which is characterized by extrauterine manifestations. We describe a case of cerebellar endometriosis in a 39-year-old woman who underwent posterior fossa decompression multiple times without establishing a correct diagnosis. Her neurologic status progressively worsened due to chronic hydrocephalus and brainstem compression by cysts. Late in the clinical course, histology from the cyst wall was taken that revealed endometriosis with clear cells and positive immunohistology for progesterone and estrogen receptors. Treatment with gestagens was started but did not improve the patient's status. In patients with chronic recurring intracranial cysts and hydrocephalus, cerebral endometriosis should be considered.
Comparison of Outcomes of End-to-End versus End-to-Side Anastomoses in Lower Extremity Free Flap Reconstructions
Authors: Broer Peter Niclas , Moellhoff Nicholas , Mayer Julius M. , Heidekrueger Paul I. , Ninkovic Milomir , Ehrl Denis 
Published: March 2020

Abstract
Background Whether to perform an end-to-end (ETE) versus end-to-side (ETS) arterial anastomosis is an integral part of preoperative planning and intraoperative decision making in free flap-based reconstructions. This study evaluated the impact of microsurgical anastomotic technique on outcomes of lower extremity reconstructions, with a focus on patients with peripheral arterial disease (PAD).
Methods Over a 6-year period, 425 patients underwent 437 microvascular lower extremity free flap reconstructions with fasciocutaneous anterolateral thigh- or gracilis muscle flaps at a single surgical center. The cases were divided into an ETE (n = 297 patients) versus ETS (n = 128 patients) group according to the anastomotic technique. A retrospective analysis of patients' demographics, perioperative details, surgical complications, free flap types, recipient sites, flap survival, and the potential impact of PAD on outcomes was performed. Patient groups were comparable regarding comorbidities, American Society of Anesthesiologists scores, types of performed free flaps and recipient sites.
Results We found no significant differences between the ETE versus ETS groups regarding the rate of major or minor complications (p > 0.05). Specifically, in patients suffering from PAD (n = 64) the type of arterial anastomosis had no effect on the outcome.
Conclusion Overall, no significant differences in outcomes were observed when comparing the types of performed arterial anastomosis. This observation also held true for the subgroup of patients with PAD. Given that an ETS anastomosis did not increase the risk to encounter complications while preserving distal perfusion, we believe that this technique is the method of choice, especially in patients with impaired vascular status.
Bilateral Sudden Sensorineural Hearing Loss in Waldenström’s Macroglobulinemia: Case Report and Review of the Literature
Authors: Shoman Nael M. , Aldahmashi Thamir 
Published: March 2020

Abstract
Objective Waldenström’s macroglobulinemia (WM) is a rare indolent B-cell lymphoproliferative disorder, representing 1 to 2% of all hematological malignancies. Involvement of the inner ear is rare with only case reports published over the past six decades.
Methods The occurrence of bilateral sudden sensorineural hearing loss is exceeding rare, with limited published data in the literature. We present a case of a 62-year-old man diagnosed with WM who presented with bilateral sequential sudden sensorineural hearing loss.
Results A few months following his WM diagnosis, he experienced sudden hearing loss in his left ear. He was treated with a course of oral steroids with no improvement. Three months following this incident, he experienced a similar sudden loss of hearing in his right ear. Treatment for WM was initiated. A repeat hearing test, done 1 week later, did not show any significant improvement in his right hearing.
Conclusion The clinical course of WM is highly variable, with relatively infrequent involvement of lymph nodes, spleen, or liver. The inner ear is rarely involved. In this article, otologic clinical presentation is discussed, along with a review of the literature on hearing loss in WM.
Etiology, Pathology, and Classification of Atrial Fibrillation
Authors: Nayak Srishti , Natarajan Balaji , Pai Ramdas G. 
Published: March 2020

AbstractAtrial fibrillation (AF) is a disorganized tachyarrhythmia with significant public health importance due to high morbidity, mortality, and health-care costs. Incidence rate of AF is on the rise and there are several modifiable and nonmodifiable risk factors that are responsible. Exact mechanisms and pathogenesis of AF are still poorly understood, yet they still have great implications in management. The aim of this article is to summarize the epidemiology, major risk factors, and their role in the pathogenesis of AF. Finally, we have reviewed the classification of AF as per professional society guidelines.
Risk and Consequences of Postoperative Delirium in Cardiac Surgery
Authors: Sugimura Yukiharu , Sipahi Nihat Firat , Mehdiani Arash , Petrov Georgi , Awe Mareike , Minol Jan Philipp , Boeken Udo , Korbmacher Bernhard , Lichtenberg Artur , Dalyanoglu Hannan 
Published: March 2020

Abstract
Background Delirium is a common complication after cardiac surgery that leads to increased costs and worse outcomes. This retrospective study evaluated the potential risk factors and postoperative impact of delirium on cardiac surgery patients.
Methods One thousand two hundred six patients who underwent open-heart surgery within a single year were included. Uni- and multivariate analyses of a variety of pre, intra-, and postoperative parameters were performed according to differences between the delirium (D) and nondelirium (ND) groups.
Results The incidence of delirium was 11.6% (n = 140). The onset of delirium occurred at 3.35 ± 4.05 postoperative days with a duration of 5.97 ± 5.36 days. There were two important risk factors for postoperative delirium: higher age (D vs. ND, 73.1 ± 9.04 years vs. 69.0 ± 11.1 years, p < 0.001) and longer aortic cross-clamp time (D vs. ND, 69.8 ± 49.9 minutes vs. 61.6 ± 53.8 minutes, p < 0.05). We found that delirious patients developed significantly more frequent postoperative complications, such as myocardial infarction (MI) (D vs. ND, 1.43% [n = 3] vs. 0.28% [n = 2], p = 0.05), cerebrovascular accident (D vs. ND, 10.7% [n = 15] vs. 3.75% [n = 40], p < 0.001), respiratory complications (D vs. ND, 16.4% [n = 23] vs. 5.72% [n = 61], p < 0.001), and infections (D vs. ND, 36.4% [n = 51] vs. 16.0% [n = 170], p < 0.001). The hospital stay was longer in cases of postoperative delirium (D vs. ND, 23.2 ± 13.6 days vs. 17.4 ± 12.8 days, p < 0.001), and fewer patients were discharged home (D vs. ND, 56.0% [n = 65] vs. 66.8% [n = 571], p < 0.001).
Conclusions Because the propensity for delirium-related complications is high after cardiac surgery, a practical, preventative strategy should be developed for patients with perioperative risk factors, including higher age and a longer cross-clamp time.
Thrombocytopenia and Absent Radii Syndrome with Tetralogy of Fallot and Hypothyroidism
Authors: Sahu Manoj Kumar , Singh Dharmraj , Saurav Gaind , Singh Sarvesh Pal , Rajashekar Palleti 
Published: March 2020

AbstractThrombocytopenia and absent radii (TAR) syndrome is a rare genetic disorder characterized by congenital absence of both radii, presence of both the thumbs, and severe thrombocytopenia which resolves spontaneously in childhood. The incidence is 0.5 to 1 per 100,000 live births and this syndrome may be associated with anomalies of other organs like gastrointestinal (milk protein allergy), genitourinary, cerebral, cardiac, renal, and so forth. Involvement of endocrine system is not reported in the literature. We describe a case of TAR syndrome with tetralogy of Fallot and newly diagnosed hypothyroidism.
Psychological Stress in Myocardial Infarction Patients
Authors: Vaswani Daya 
Published: March 2020

Abstract
Background The interplay between mental and physical health is an area of inadequate research and hence poorly understood. However, decades of research have made surprising revelations—that both may actually cause each other—but the precise nature of these links is not clearly defined. Hence, the aim of this paper is to determine the prevalence of undiagnosed depressive and anxiety symptoms in patients presenting with Acute Myocardial Infarction (MI) in the Intensive Care Unit (ICU) of our hospital.
Materials and Methods This is a cross-sectional study conducted on 100 patients admitted with acute MI in the cardiology ICU of our tertiary hospital. A detailed history was obtained, including socioeconomic history and complete medical history. The Perceived Stress Scale (PSS) was used to assess subjective psychological stress. Patient Health Questionnaire-9 (PHQ9) was used to diagnose unrecognized depression, and Generalized Anxiety Disorder-7 (GAD7) was used to identify anxiety disorder among patients.
Results Out of total study population, 35% (n = 35) were females (mean age: 57.44 ± 13.54 years) and 65% (n = 65) were males (mean age: 55.90 ± 10.81 years). 82% (n = 82) of the patients were found to have subjective psychological distress, among which 70.73% (n = 58) patients had depressive symptoms, with 5.17% (n = 3) having major depression. Of the total patients diagnosed to have depression, 68.96% (n = 40) patients were males and 31.03% (n = 18) were females, with two out of three patients with major depression being females. Among the total study patients, 24% (n = 24) had anxiety symptoms, out of which 58.3% (n = 14) were males and 41.6% (n = 10) were females, with only two patients categorized as having severe anxiety disorder, both being females. Univariate analysis of study variables with depression showed that increased incidence of subjective psychological stress and lesser physical activity were strongly associated with depressive symptoms (P value: 0.04 and 0.01 respectively). Among the total study patients, 24% (n = 24) had anxiety symptoms out of which 58.3% (n = 14) were males and 41.6% (n = 10) were females, with only two patients categorized as having severe anxiety disorder, both being females. Univariate analysis of study variables with anxiety disorder showed significant association of older age > 60 years (P value 0.002), hypertension (HTN) (P value 0.001), T2DM (P value 0.02), and coexisting T2DM and HTN (P value 0.05), with anxiety disorder. Smoking and alcoholism also demonstrated an independent association with anxiety disorder (P value 0.04 and 0.01 respectively). Lesser physical activity demonstrated a strong association with anxiety (P value 0.0001).
Conclusion The prevalence of psychological stress among MI patients is high, with depression existing in 70.7% of patients, notably, major depression was more in females. Of the total study population, 24% of patients had anxiety, where a severe degree of anxiety was more in female patients.
To Evaluate the Influence of Different Implant Thread Designs on Stress Distribution of Osseointegrated Implant: A Three-Dimensional Finite-Element Analysis Study–An In Vitro Study
Authors: Sharma Chhavi , Kalra Tarun , Kumar Manjit , Bansal Ajay , Chawla Anupreet Kaur 
Published: March 2020

Abstract
Introduction Dental implants are common treatment modality for tooth loss which leads to unaesthetic appearance and may also cause deterioration of mastication and speech. The aim of implant therapy in dentistry is to restore tissue contour, function, comfort, aesthetic, and speech. Dental implant role is to transfer the mechanical force created during chewing to the supporting osseous tissues within the mandible and maxilla. The importance of biomechanical factors such as the bone-implant interface, implant thread design, the length and diameter of implants, type of loading, the quality and quantity of surrounding bone have been strained by various authors. The selection of implant thread design plays an important role in the outcome of the treatment. This study was done to evaluate the influence of different thread designs on stress distribution of osseointegrated implant using three-dimensional (3D) finite-element analysis.
Materials and Methods Three implants with different thread designs, namely V-thread, buttress, and reverse buttress thread designs were considered and dimensions were standardized. The site considered was the mandibular molar region with cortical and cancellous bone assuming to be isotropic and homogeneous. The implant modeling was done with the ANSYS 18.1 software. Axial load (100N) and buccolingual load (50N) were applied. The stresses were calculated as Von Mises stress criterion.
Results Minimum von mises Stress concentration was seen for tapered implant body with reverse buttress thread design under axial load 100N and tapered implant body with V-thread under buccolingual load of 50N at cortical bone which signifies bone preservation. Stress levels were observed maximum at implant and minimum at the cancellous bone.
Conclusion Hence, within the limitations of this study the results obtained can be applied clinically for appropriate selection of implant thread design for a predictable success of implant therapy.
Introduction
Authors: Comrie Bernard 
Published: March 2020

Abstract
This Introduction highlights some of the recurrent themes of the volume, in particular two diachronic
paths: (i) resultative > perfect > perfective past; (ii) relaxation of an initial constraint restricting the perfect to
results attributed to the patient. The latter leads to a discussion of be and have perfects, including
English and Dutch data that point to important methodological caveats.
The development of the perfect within IE verbal systems
Authors: Kümmel Martin Joachim 
Published: March 2020

Abstract
This paper gives an overview of the development of perfect forms in the branches of Indo-European. It
begins with a discussion of the perfect in Proto-Indo-European and problems with its reconstruction. Special attention is paid
to the formal and functional discrepancies between the Common Indo-European perfect and related forms in the Anatolian branch.
The paper then traces the continuation of the Proto-Indo-European perfect form and gives an overview of various new
constructions which take the place of the original form. It concludes with a short discussion of the semantic shifts which
take place in the different Indo-European branches.
Celtic past tenses past and present
Authors: Wigger Arndt 
Published: March 2020

Abstract
Past tense marked for perfective aspect, resultative, or other typical features of grammatical perfect
forms is clearly in evidence in all of the modern Celtic languages, although not normally listed in the standard paradigms. An
overview of usages in the modern languages will be given here, the major structures being of fairly recent origin. The formal
structure is periphrastic throughout, divided between an older type employing the preposition ‘after’, and a newer one which
shows some resemblance to the have-perfects in many other European languages. In agreement with previous authors,
these major formal types will be referred to as p1 and p2 respectively. As the question of active vs.
passive is crucial here, this side of the matter will be discussed to some extent, as will be the issue of syntactically
reduced structures containing traces of a perfect tense. Questions of contact-induced change will not be addressed in this
descriptive overview, except on some minor points. Given the grammatical and semantic complexity of this matter, with
different developments over six literary languages and a multitude of dialectal varieties, the early (pre)history will not be
discussed in much detail here.
Paradigmatisation of the perfect and resultative in Tocharian
Authors: Seržant Ilja A. 
Published: March 2020

Abstract
In this chapter I consider a periphrastic construction based on the resultative participle and the
auxiliary. The semantics are those typical of a perfect grammaticalized from a resultative construction. The combination with
time adverbials as well as contextual information show that the reference time coincides with the moment of speech and is not
prior to it. In addition to the inherited meaning of the resultative perfect, other meanings typical of a perfect are also
found, e.g., the experiential perfect. Finally, there are no selectional input restrictions: all Vendler classes are found in
this construction – a situation that may not be found with early resultatives. Even though, these properties suggest an
advanced grammaticalisation degree of the construction, there are also indications for its recent development. For example,
there is no evidence for a non-compositional interpretation of the auxiliary such as remote past – a meaning facet typical of
pluperfects.
The perfect in Middle and New Iranian languages
Authors: Jügel Thomas 
Published: March 2020

Abstract
This paper is the first step towards a description of the category ‘perfect’ in Middle and New Iranian
languages. It attempts a comprehensive overview of the various forms that developed in the course of the past 2000 years,
arriving at a typological classification of the Iranian languages. The comparison of perfects with their paradigmatic
counterparts helps delimit the functional range that the perfect covered or covers, which, owing to lack of information, is as
much as can be achieved for the majority of the Iranian languages. The diachronic perspective provides insight into the
functional development of the perfect, which began with a resultative construction, and which in turn developed via a perfect
into a simple past or past perfective (in some cases more than once). The paper concludes with a brief overview of some
special perfect constructions such as double perfects, evidentials and perfect continuous forms.
The perfect in North-Eastern Neo-Aramaic
Authors: Khan Geoffrey 
Published: March 2020

Abstract
This paper describes the form and function of the perfect in the North-Eastern Neo-Aramaic (NENA) dialects,
a highly diverse subgroup of Neo-Aramaic originally spoken east of the Tigris river. After a short description of the
expression of the perfective in § 1, a detailed classification of the various forms of
the perfect is presented in § 2. Many of these forms have developed under the
influence of the verbal system of Iranian languages of the area (§ 3). The perfect in
NENA has a wide range of functions, some of them not commonly documented elsewhere, such as the use of the perfect to express
the remote past and its use in presuppositional contexts (§ 4). Some of these
functions have parallels in the function of the perfect in Iranian languages in contact with NENA (§ 5). Finally, an analysis is given of the NENA perfect within a Reichenbachian framework (§ 6). The common denominator of the diverse functions of the NENA perfect is the fact
that the event is viewed from an indirect reference point and as a result the event is defocalized. The separation between the
event and the reference point (e < r), which is the hallmark of the perfect, need not be temporal distance, but may be
cognitive distance from the focus of attention due to the presuppositional information status of the event.