bluuebunny/crossref_metadata_2025_split huggingface dataset:
Morphology of gas flow during collision of accretion disks in a T Tauri type binary with elliptic orbit
Authors: Сытов А.Ю. 
Published: January 2021

Представлены результаты численного моделирования взаимодействия аккреционных дисков при прохождении периастра в двойной звезде типа Т Тельца с эллиптичной орбитой. Рассмотрена структура системы ударных волн в аккреционных дисках и между ними и ее изменение с течением времени. Обсуждается возможность построения аналитической модели взаимодействия аккреционных дисков.
We present the results of numerical simulation of interacting accretion disks in a T Tauri type binary with elliptic orbit. Using these results we study structure and evolution of the system of shock waves in accretion disks and between them. Finally we discuss the possibility of bringing up an analytical model for accretion disk interaction.
Observational signs of wide binary stars dissolution in Gaia DR2 data
Authors: Сапожников С.А. , Ковалева Д.А. 
Published: January 2021

По данным Gaia DR2 в радиусе 100 пк от Солнца исследованы двойные звезды с общим собственным движением до расстояния между компонентами 3 пк. Для исключения возможных случайных совпадений смоделирована искусственная выборка случайных пар. Показано, что принятый способ отбора пар с общим собственным движением делает загрязнение выборки случайными совпадениями незначительным даже при больших расстояниях между компонентами; величина такого загрязнения оценена численно. Получено бимодальное распределение по логарифму расстояния между компонентами, демонстрирующее для очень широких пар минимум, связанный с распадом систем, на расстоянии ≈ 0.5 пк, и дальнейший рост, формируемый распавшимися, медленно расходящимися компонентами.
Binary and common proper motion stars within 100 pc of the Sun are being investigated using Gaia DR2 data. An artificial random pairs sample is constructed to exclude possible random pairing contamination. Numerical estimation of this contamination shows that the chosen method to select the common proper motion stars yields little contamination even at high separations. In a logarithmic scale the separation distribution appear to have a minimum at ≈ 0.5 pc, most likely related to binary star dissolution, with further increase formed by dissolved, slowly distancing components.
A project of echellé spectropolarimeter for the primary focus of the 6-m BTA telescope
Authors: Панчук В.Е. , Клочкова В.Г. , Юшкин М.В. , Сачков М.Е. , Якопов Г.В. , Верич Ю.Б. , Емельянов Э.В. 
Published: January 2021

Сообщается о завершении очередного этапа работ по созданию эшелле-спектрографа ESPriF, предназначенного для спектроскопии и спектрополяриметрии звезд и планетарных туманностей. Потенциальное качество нового спектрографа оценивается относительно характеристик Основного звездного спектрографа (ОЗСП) БТА, используемого сегодня для обеспечения большей части программ спектроскопии и спектрополяриметрии звезд в РФ. Спектрограф ESPriF планируется использовать в качестве одного из средств наземной поддержки проекта «Спектр-УФ».
In this paper we inform that the next step of a creation of echellé spectropolarimeter ESPriF for the primary focus of the 6-m BTA telescope has finished. The instrument will be used for spectroscopy and spectropolarimetry of stars and planetary nebulae. The instrument potential quality was estimated in comparison with the Main Stellar Spectrograph (MSS) of BTA, which is used currently for the most Russian spectroscopic and spectropolarimetric programs. The ESPriF spectrograph will be used as an instrument for ground support observations of the “Spektr-Uf” space mission.
Crecimiento de la productividad total de los factores en la agricultura: análisis del índice de Malmquist de 14 países, 1979-2008
Authors: Zuniga González Carlos Alberto 
Published: January 2021

La investigación se centró en estudiar el comportamiento de la productividad en la producción agrícola en 14 países en desarrollo de la región de Centroamérica y el Caribe. Se utilizaron datos de la Organización de las Naciones Unidas para la Agricultura y la Alimentación en el período 1979-2008. El estudio utilizó el análisis envolvente de datos (DEA) para derivar los índices de productividad de Malmquist. Se examinaron las tendencias de la productividad agrícola durante el período. Las cuestiones de la puesta al día y la convergencia, o en algunos casos la posible divergencia, en la productividad en la agricultura se examinó dentro de un marco global. 1.5% de la PTF, con el cambio de eficiencia (o puesta al día) contribuyendo con 0.1% por año y el cambio técnico (o cambio de frontera) proporcionando el otro 1.4% como resultado. El desempeño más espectacular lo presenta República Dominicana, por lo que representó 3.9% en la PTF durante el período de estudio un crecimiento anual promedio. Cuba, Barbados, Costa Rica, Panamá y Guatemala han registrado una tasa de crecimiento de la PTF de solo 2,9 cada uno.
From “Is” to the (News) World: How Facebook Jeopardized Its Life-Diary Nature and Occupied the Network
Authors: Calzati Stefano , Simanowski Roberto 
Published: January 2021

This article focuses on self-narratives and identity construction in the context of social networking sites (SNSs). It does so by discussing the findings of a research that had at its core a practice-based module titled “Facebook and Autobiography”, which was designed and taught at a major Hong Kong University. Through a cyber autoethnographic approach, which aligns to the methodological orientation of the second wave in narratology studies, the research explores how the infrastructure of Facebook affects the processes of self-narration in comparison with traditional written dairies. Contrary to previous studies, the interviews with students-participants and the analysis of their Facebook’s profiles suggest that the retrieval on Facebook of even small self-narratives is impaired by the fact that the platform has abandoned its life-diary orientation in favour of a news-based business model where the posthuman connotation of profiles prevails.
Off-Modern Hybridity in TV Theatre: Theatrical, Cinematic and Media Temporalities in Rupert Goold’s Macbeth (BBC - Illuminations Media, 2010)
Authors: Huertas-Martín Víctor 
Published: January 2021

Rupert Goold’s screen production of Macbeth – firstly, staged in 2007 and, later, filmed in 2010 – has been studied as an example of the stage-to-screen hybrid corpus of Shakespearean audio-visual adaptations. Thus, much of the critical emphasis on the production has been placed on its filmic qualities. Particularly, the genre film conventions deployed across the film has summoned the attention of Shakespeare on screen scholars and it has been the creators’ intentions to precisely point at Goold’s filmic intertextual repertoire. Given the recent increasing attention to the multiple media and languages employed in stage-to-screen hybrid Shakespearean adaptations and other exchanges between the languages of the stage and film to rework Shakespearean and theatrical productions, it is instructive to observe the ways in which adaptations such as this one engage with larger processes of transmedia storytelling, not only paying attention to theatrical and filmic languages but to the transmedia strategies these TV theatrical films make use of. Importantly, it is instructive to look into the narrative and philosophical purposes served by transmedia storytelling as the multiple media and languages used in the film display a range of temporalities and film genres associated to them that allow us to expand the interpretive range of Shakespeare’s source text. Following this premise, this essay examines Goold’s Macbeth as a nostalgia narrative in which transmedia strategies serve to display a range of media-based narrative strands that expand the film’s range of possible interpretations. To prove this, I will insert Goold’s film in the larger process of transmedia storytelling encompassing the performance history of Macbeth. Additionally, I will identify narrative strands in Goold’s televisual, theatrical, musical, poetic and computer-based sources. The results will show that Macbeth – and, by extension, potentially this applies to TV theatrical adaptations of Shakespeare’s plays – constitutes a strand of the larger corpus of transmedia storytelling wrapping up the Scottish play’s performance history as well as Shakespeare’s overall performance history.
New Possibilities in Audiovisual Ergodic Narratives
Authors: Crisóstomo Gálvez Raquel , Valderrama Carreño Marc 
Published: January 2021

Espen J. Aarseth defined in his work Cybertext: Perspectives on Ergodic Literature (1997) ergodic literature as one in which “a non-trivial effort is required to allow the reader to pass through the text”. Based on the analysis of a representative body of narratives found within the ergodic spectrum, this article aims to bring order to the classification of ergodic narratives; and contribute to the development of two possibilities of this type of narrative: transmedial and raccontian. Transmedial ergodic literature takes into account the new media and the latest technologies available to the teleuser in order to transform his limited role from decision making to an acting role in the narrative, becoming an off-stage character. The raccontian proposal is characterized by the application of alterations in the hidden layer of a storyline using the Schrödinger cat effect. Ergodic decision-making dynamics are applied in racconto scenes (Rondolino e Tomasi 1995) to manipulate the timeline prior to the story world’s starting point. This allows a greater diversification of outcomes by varying elements that usually remain inflexible and truncated. Two proposals that therefore affect different areas of transmedia communication, as we will demonstrate in this article.
Did state‐mandated restrictions on sugar‐sweetened drinks in California high schools increase soda purchases in school neighborhoods?
Authors: Kiesel Kristin , Ji Mengxin 
Published: January 2021

AbstractThis paper evaluates the effectiveness of restrictions on sugar‐sweetened beverages (SSBs) in schools as a policy approach aimed at reversing the upward trend in obesity among adolescents. Specifically, we test if the implementation of SB 965 in California high schools led to detectable compensation effects outside of school by estimating changes in soda purchases observed in store‐level scanner data. Our unique data and identification strategy address data limitations of previously published studies, and our reported results strengthen the notion that preferences for unhealthy foods will persist even after their availability is restricted in select environments.
Infected liver cysts resulting from ascending cholangitis and cancer of the ampulla of Vater: A case report
Authors: Hsu Ming‐Tse , Tsai Tsung‐Jung , Chen Chi‐Yi , Chiang Ching‐Chung , Chen Chien‐Chin 
Published: January 2021

AbstractInfected liver cysts may have a unique etiology and require further workup. Generally, large cyst is easy to be symptomatic. In contrast, smaller cyst with infection in our case is associated with ampullar cancer of Vater without typical manifestations of jaundice, body weight loss, and pancreatitis. We presented the case of a 61‐year‐old man with infected liver cysts, which is confirmed by abdominal computer tomography and liver cysts drainage with bacterial culture. Endoscopic retrograde cholangiopancreatography revealed a swollen papilla of Vater and a dilated common bile duct. Biopsy confirmed adenocarcinoma of the ampulla of Vater. Further surgical pathology revealed communication of bile duct with liver cysts and no evidence of tumor invasion to pancreatic duct and common bile duct. The infected liver cysts may result from ascending cholangitis which is secondary to ampullar cancer. The patient underwent the Whipple procedure, unroofing of the right‐side liver cyst, and partial hepatectomy without complications. There is no recurrence of infected liver cyst and cancer till now after follow‐up for 3 years. Infected liver cysts are rarely associated with ampullar cancer. Early diagnosis and successful resection of early stage ampullary neoplasm ensure favorable outcomes.
Segmented Polyurethane Elastomers with Mechanochromic and Self‐Strengthening Functions
Authors: Seshimo Kota , Sakai Hio , Watabe Takuma , Aoki Daisuke , Sugita Hajime , Mikami Koichiro , Mao Yuchen , Ishigami Akira , Nishitsuji Shotaro , Kurose Takashi , Ito Hiroshi , Otsuka Hideyuki 
Published: January 2021

AbstractMechanochromic elastomers that exhibit force‐induced cross‐linking reactions in the bulk state are introduced. The synthesis of segmented polyurethanes (SPUs) that contain difluorenylsuccinonitrile (DFSN) moieties in the main chain and methacryloyl groups in the side chains was carried out. DFSN was selected as the mechanophore because it dissociates under mechanical stimuli to form pink cyanofluorene (CF) radicals, which can also initiate the radical polymerization of methacrylate monomers. The obtained elastomers generated CF radicals and changed color by compression or extension; they also became insoluble due to the mechanically induced cross‐linking reactions. Additionally, an SPU containing diphenylmethane units also exhibited highly sensitive mechanofluorescence. To the best of our knowledge, this is the first report to demonstrate damage detection ability and changes in the mechanical properties of bulk elastomers induced by simple compression or extension.
Myocardial rupture after percutaneous coronary intervention of an unstable RCA lesion in myocardial infarction and concomitant stroke treated with intravenous fibrinolytic agents: A case report
Authors: Bay Benjamin , Waldeyer Christoph , Rimmele Leander , Blankenberg Stefan , Clemmensen Peter 
Published: January 2021

AbstractMyocardial rupture after thrombolysis is an often fatal consequence. For patients with myocardial infarction and ischemic stroke within a short timeframe, a catheter‐based therapy to retrieve emboli poses a valid therapeutic option in case of a treatment target in CT‐Angiography.
A case report on a large, peduncular intra‐abdominal hepatocellular carcinoma extending into the retroperitoneum
Authors: Omer Dana M. , Dozier Jordan , Cao Zongxian , Zhu Hongfa , McCain Donald A. 
Published: January 2021

Key Clinical MessageHere, we discuss a relatively uncommon presentation of a hepatocellular carcinoma and discuss its preoperative planning and surgical intervention required to reach complete resection.
Nucleophilic Alkoxylations of Unactivated Alkyl Olefins and α‐Methyl Styrene by Photoredox Catalysis
Authors: Seyfert Fabienne , Mitha Mathis , Wagenknecht Hans‐Achim 
Published: January 2021

AbstractN,N‐diisobutylaminophenyl‐phenothiazine is a strongly reducing catalyst that allows – for the first time – the photoredox catalytic addition of alcohols to alkyl olefins as non‐activated substrates to products with Markovnikov orientation. The irradiation at 365 nm does not require any additional reagent. Using α‐methyl styrene as activated substrate we additionally show that this photoredox catalytic method tolerates other functional groups, including allyl, alkynyl, cyanide, and even acid‐labile Boc groups within the substrate scope.
Improving accuracy of gaze‐control tools: Design recommendations for optimum position, sizes, and spacing of interactive objects
Authors: Niu Ya‐feng , Zuo Hong‐rui , Yang Xin , Xue Cheng‐qi , Peng Ning‐yue , Zhou Lei , Zhou Xiao‐zhou , Jin Tao 
Published: January 2021

AbstractTo investigate a suitable design of interactive objects in the fixation‐triggered eye‐control interface, this study conducted two ergonomic experiments based on the location of an object, area of the object, and distance between adjacent objects. Experiment 1 investigated the priority distribution of different regions and recommended values of object sizes in different regions. The results showed that middle‐middle (MM) area is the optimal area, while middle‐left (ML) area, middle‐right (MR) area, and upper‐left (UL) area are suboptimal areas, and the remaining are general areas. The recommended minimum sizes for the optimal area, suboptimal area, and general area are 2.636° (200 px on the screen of a 1920 px × 1080 px 14 inch monitor), 2.978° (225 px on the screen of a 1920 px × 1080 px 14 inch monitor) and 3.322° (250 px on the screen of a 1920 px × 1080 px 14‐inch monitor), respectively. Experiment 2 conducted ergonomic experiments of different distances between adjacent objects in horizontal and vertical distributions. The results showed that the appropriate setting of the distribution and size of the objects showed no significant difference between different levels of spacing on the trigger accuracy rate and task completion time. Further, 1.032° (75 px on the screen of a 1920 px × 1080 px 14‐inch monitor) could be recommended as the most suitable spacing. According to the conclusions of Experiments 1 and 2, an optimized eye‐control interface and the NASA‐TLX scale were used to verify the validity and scientificity of the experimental results. The conclusions can be employed to improve the interaction efficiency of the eye‐control system and user experience and expand the application field of eye control.
Endometriosis and malignancy: The intriguing relationship
Authors: Dahiya Alka , Sebastian Ajit , Thomas Anitha , George Rachel , Thomas Vinotha , Peedicayil Abraham 
Published: January 2021

AbstractObjectiveTo determine the prevalence and study the association of ovarian, uterine, and breast cancers with endometriosis.MethodsA cross‐sectional study of all women with a tissue‐proven diagnosis of endometriosis postoperatively in a tertiary care hospital between January 1, 2010, and December 31, 2019, was conducted to determine the prevalence of coexistent malignancy. Patient details were obtained from electronic clinical records. Univariate analysis followed by multivariate analysis was done to find independent risk factors associated with malignancy.ResultsOut of 800 patients, 104 (13.0%) were found to have coexistent malignancy: ovarian (50, 6.2%); endometrial (33, 4.1%); synchronous ovarian and endometrial (7, 0.9%); and breast (14, 1.8%). Increasing age (odds ratio [OR] 1.13; 95% confidence interval [CI] 1.09–1.16), higher levels of cancer antigen 125 (CA 125) (OR 1.002; 95% CI 1.001–1.005), postmenopausal status (OR 6.2; 95% CI 2.0–19.2), duration of endometriosis over 5 years (OR 4.7; 95% CI 2.5–9.0), and endometriomas larger than 8 cm (area under the curve 0.83) were predictive of coexistent malignancy.ConclusionEndometriosis is associated with an increased risk of ovarian, endometrial, and breast malignancy. Increasing age, postmenopausal status, higher levels of CA 125, larger endometrioma, and long‐standing disease are predictive risk factors.
Dendritic cell biocompatibility of ether‐based urethane films
Authors: Safina Ingrid , Alghazali Karrer M. , Childress Luke , Griffin Christopher , Hashoosh Ahmed , Kannarpady Ganesh , Watanabe Fumiya , Bourdo Shawn E. , Dings Ruud P.M. , Biris Alexandru S. , Vang Kieng Bao 
Published: January 2021

AbstractThe use of synthetic materials for biomedical applications is ever expanding. One of the major requirements for these materials is biocompatibility, which includes prevention of immune system responses. Due to the inherent complexity of their structural composition, the polyurethane (PU) family of polymers is being used in a variety of medical applications, from soft and hard tissue scaffolds to intricate coatings on implantable devices. Herein, we investigated whether two polymer materials, D3 and D7, induced an immune response, measured by their effects on a dendritic cell (DC) line, JAWS II. Using a lactate dehydrogenase cytotoxicity assay and Annexin V/PI staining, we found that the PU materials did not induce cytotoxicity in DC cells. Using confocal microscopy, we also showed that the materials did not induce activation or maturation, as compared to positive controls. This was confirmed by looking at various markers, CD80, CD86, MHC class I, and MHC class II, via flow cytometry. Overall, the results indicated that the investigated PU films are biocompatible in terms of immunotoxicology and immunogenicity and show great promise for use in regenerative medicine.
How do migration and remittances affect inequality? A case study of Mexico
Authors: Kóczán Zsóka , Loyola Franz 
Published: January 2021

AbstractThe poverty‐reducing effects of remittances have been well documented; however, their effects on inequality are less clear. This paper examines the impact of remittances on inequality in Mexico using household‐level information on the receiving side. It hopes to speak to their insurance role by examining how remittances are affected by domestic and external crises: the 1994 Mexican peso crisis and the global financial crisis. We find that remittances lower inequality and that they become more pro‐poor over time. This also strengthens their insurance effects, mitigating some of the negative impact of shocks on the poorest.
Characterization of defined sulfated heparin‐like oligosaccharides by electrospray ionization ion trap mass spectrometry
Authors: Lemmnitzer Katharina , Köhling Sebastian , Freyse Joanna , Rademann Jörg , Schiller Jürgen 
Published: January 2021

AbstractGlycosaminoglycans (GAG) as long, unbranched polysaccharides are major components of the extracellular matrix. Many studies provided additional evidence of a specific binding between mediators and sulfated GAG, at which the sulfation code—which means the number and positions of sulfate groups along the polysaccharide chain—plays an important role.GAG from natural sources are very inhomogeneous regarding their sulfation patterns and molecular weight. Additionally, there is a high risk of contamination. This results in a growing interest in the careful characterization of native GAG and the synthesis of artificial GAG. Additionally, chemically oversulfated GAG analogues show many favorable properties. However, the structural characterization of these carbohydrates by mass spectrometry remains challenging. One significant problem is the sulfate loss during the ionization, which increases with the number of sulfate residues.We used the sulfated pentasaccharide fondaparinux as model substance to optimize sample preparation and measurement conditions, compared different established desalination methods and already existing protocols for sulfated oligosaccharides, and investigated their impact on the quality of the mass spectra. After optimization of the measurement conditions, we could establish a gentle and fast protocol for the mass spectrometry characterization of (fully) sulfated, artificial GAG‐like oligosaccharides with minimized sulfate loss in the positive and negative ion mode. Here, the negative ion mode was more sensitive in comparison with the positive one, and fondaparinux species with sulfate loss were not detectable under the optimized conditions in the positive ion mode.
Kaposi's sarcoma‐associated herpesvirus and extracellular vesicles
Authors: Barrett Lindsey , Dai Lu , Wang Shanzhi , Qin Zhiqiang 
Published: January 2021

AbstractKaposi's sarcoma‐associated herpesvirus (KSHV) represents the etiological agent for several human malignancies, including Kaposi's Sarcoma (KS), primary effusion lymphoma (PEL), and multicentric Castleman's disease (MCD), which develop mainly in immunocompromised patients. KSHV has established many strategies to hijack and thwart the host's immune responses, including through the use of extracellular vesicles (EVs). EVs represent a significant mode of intercellular communication as they carry a variety of molecules that can be delivered from cell‐to‐cell. EVs are now recognized as one of the major players in immune system development and function during both innate and adaptive immune responses. In the current mini‐review, we summarize recent findings on how KSHV utilizes EVs to create favorable environments for viral spread and persistence while evading immune responses. We also discuss the limitations and unanswered questions in this field and the potential areas for related immunotherapies.