bluuebunny/crossref_metadata_2025_split huggingface dataset:
Combining ability and response to CMS in reverse diploid maize lines developed at VIR
Authors: Khatefov E. B. , Shomakhov B. R. , Kushkhova R. S. , Kudaev R. A. , Khashirova Z. T. , Gyaurgiev A. Kh. 
Published: April 2020

Abstract. Hybrid maize breeding requires constant renewal of the source material. In this regard, broadening of genetic variation in parental lines is one of the primary tasks in heterotic hybrid breeding programs. The use of reverse diploid inbred lines derived from a tetraploid population is considered as an innovative approach to achieve this goal.Results. The investigated material comprised 106 reverse diploid (rediploid) inbred lines originating from diploid plants selected in segregating selfed progenies of triploid populations and consequently subjected to inbreeding, while triploid populations resulted from a cross between plants of a tetraploid population with a broad genetic basis and a diploid line. The use of a system of crosses with 37 sterile testers belonging to different FAO maize maturity groups allowed the evaluation of the rediploid lines’ combining ability and the response to M and C types of CMS. Field tests were conducted in 2019 in the steppe zone of Kabardino-Balkaria. Forty-six lines (43.3%) with the combining ability ranging from ultra-high to good, and 78 lines (73.6%) maintaining the CMS character were identified. Among them, 59 lines (55.7%) were maintainers for the M type CMS, 15 lines (14.1%) for C type CMS, and 4 lines maintained sterility for both CMS types. Sixteen lines (15.1%) restored pollen fertility of the forms with M type CMS, 11 lines (10.4%) were restorers for the C-type and one line turned out to be a universal restorer for both CMS types. Ranking by the “sprout - flowering of ears” interstage period duration showed that most of the lines (66.0%) with the ability to maintain sterility or restore male fertility of M and C CMS types, as well as with the combining ability from ultrahigh to good (32.6%) fell into the group with the flowering period duration of 51-55 days. According to the results of the harvested grain moisture assessment, the hybrids ♀(РГС246с × OL213) × ♂92с5986·2·3, ♀714М × ♂1/67-1 and ♀714М × ♂92н136-4, with the values of 13, 6%, 13.9%, 14.0%, respectively, were identified. The hybrids ♀714М × ♂1/67- 1 and ♀(OL563С × KL1392) × ♂92с0653 2 1 2 were characterized by the maximum value of the selection index, i.e. 5.03 and 5.13, respectively.Conclusions. The results of the studies showed the breeding value of rediploid lines as an initial material for hybrid maize breeding.
Pengaruh Asertivitas Siswa dan Persepsi pada Matematika Terhadap Prestasi Belajar Matematika Siswa Kelas IX SMP Shalahuddin Malang
Authors: Sofian Heru 
Published: April 2020

This study aims to determine: (1) the effect of student assertiveness and perception on mathematics on student mathematics learning achievement. (2) the effect of student effectiveness on students' mathematics learning achievement. (3) the effect of perception on mathematics learning achievement. The results of this study concluded, (1) students' assertiveness had a positive and significant effect on mathematics learning achievement of students of class IX of SMP Shalahuddin Malang, (2) Perception on mathematics had a positive and significant effect on mathematics learning achievement of students of class IX of SMP Shalahuddin Malang (3) Both asertivity students and students' perceptions of mathematics simultaneously influence the student's mathematics learning achievement. That is, the higher the student's assertiveness and the better the students' perceptions of mathematics the more mathematics learning achievement of students of class IX of SMP Shalahuddin Malang.
El desarrollo del sí mismo en la infancia: Contribuciones teóricas y metodológicas desde la teoría del self dialógico (TSD) y la psicología semiótico-cultural
Authors: Roncancio-Moreno Mónica , Bermúdez-Jaimes Milton E. , Uchoa Branco Angela 
Published: April 2020

Este artículo tiene como propósito presentar una aproximación teórica y metodológica para el estudio del desarrollo del sí mismo en la niñez. Tomando como punto de partida la Teoría del Self Dialógico (TSD) y el abordaje de la Psicología Semiótico-Cultural, se propone el concepto de Posicionamiento Dinámico de Sí (PDS). Se plantea que el niño tiene un papel activo en la construcción de sus procesos de desarrollo. Metodológicamente, se propone indagar por las construcciones de indicadores del desarrollo del sí mismo a partir de observaciones en las interacciones y de las construcciones narrativas de niños y de sus otros significativos. Finalmente se sugiere que futuras investigaciones que se enfoquen en el estudio del sí mismo deben centrarse en darle una voz al niño y recuperar el carácter dinámico y dialógico del desarrollo
أثر استعمال أنموذج فان هيل في تنمية مهارات القراءات الناقدة لدى طالبات الصف الرابع الاعدادي) (
Authors: ا.م.د. انتصار كاظم جواد  , م.د. حمدي اسماعيل احمد  
Published: April 2020

يهدف البحث الحالي الى تعرف "أثر انموذج فان هيل في تنميةَ الفهم القرائي لدى طالبات الصف الرابع الاعدادي في مادةَ القراءةَ الناقدة" وقد وضع الباحثان الفرضيةَ الصفريةَ مقابل الفرضيةَ البديلةَ الآتيةَ لايوجد فروق ذو دلاله إحصائيةَ عند مستوى دلالةَ (0.05) بين متوسطي درجات المجموعةَ التجريبيةَ في تنميةَ مهارات القراءةَ الناقدةَ قبل تطبيق انموذج فان هيل وفي اثناء تطبيق الاختبار ظهر أنّ هناك فروقاً ذا دلالةَ إحصائيةَ إذ إن القيمةَ التائيةَ المحسوبةَ عند مستوى دلالةَ (0,05) وبدرجةَ حريةَ (32) هي اكبر من القيمةَ التائيةَ الجدوليةَ وبذلك ترفض الفرضيةَ الصفريةَ وتقبل البديلةَ.:
واتضحت النتائج إن الانموذج قد أثر إيجابياً في رفع مستوى النقد للنص المقروء لدى طالبات الصف الرابع الاعدادي أكثر من الطريقةَ التقليديةَ، وذلك لما أظهره البحث الحالي من تفوق المجموعةَ التجريبيةَ على المجموعةَ الضابطةَ وفي ضوء النتيجةَ يمكن استنتاج الآتي: - إن انموذج فان هيل قد أثر إيجابياً في رفع مستوى النقد للنص المقروء لطالبات الصف الرابع الاعدادي أكثر من الطريقةَ التقليديةَ، وذلك لما أظهر به البحث الحالي من تفوق المجموعةَ التجريبيةَ على المجموعةَ الضابطةَ فضلا عن ان انموذج فان هيل جعل درس القراءةَ أكثر فاعليةَ، وبعيداً عن الرتابةَ التي كانت سائدةَ في الطريقةَ التقليديةَ. كما ان هذا الانموذج ممكن يكون له دور في التطوير المناهج الدراسيةَ المقررةَ، كما أقترح الباحثان إجراء دراسات أخرى ترمي الى اجراء دراسةَ مماثلةَ تتناول الانموذج في مادةَ القراءةَ في الصف الرابع الاعدادي.
Searching for Exotic Cores with Binary Neutron Star Inspirals
Authors: Chen Hsin-Yu , Chesler Paul M. , Loeb Abraham 
Published: April 2020

Abstract
We study the feasibility of detecting exotic cores in merging neutron stars with ground-based gravitational-wave detectors. We focus on models with a sharp nuclear/exotic matter interface, and assume a uniform distribution of neutron stars in the mass range [1, 2] M
⊙. We find that the existence of exotic cores can be confirmed at the 70% confidence level with as few as several tens of detections. Likewise, with such a sample, we find that some models of exotic cores can be excluded with high confidence.
Evaluation of Intranasal Midazolam in Refraction and Fundus Examination of Young Children With Strabismus
Authors: Altintas Özgül , Karabas V. Levent , Demirci Göktug , Onur Inci , Çaglar Yusuf 
Published: April 2020

Purpose:
To determine the clinical sedative effect and dosage of intranasal midazolam in refraction and fundus examination of children with strabismus.

Patients and Methods:
Refraction and fundus examination with (n = 28) and without (n = 24) sedation were performed in 52 children with strabismus whose ages ranged from 7 to 26 months. We delivered a 5-mg/mL solution of midazolam via a syringe for 60 seconds to provide a dose of 0.2 mg/kg. We repeated the dose to a maximum of 0.3 mg/kg if there was no clinical sedative response after 10 to 15 minutes. The ease of examination and sedation for each patient was scored by a blinded observer. The groups were evaluated for ease of examination and the time needed to complete it.

Results:

We obtained clinically adequate sedation at a mean (± standard deviation) of 15 minutes (± 2.69 minutes). Sedation was achieved with a mean dose of 2.64 mg/kg (± 0.66 mg/kg). Children receiving midazolam had significantly calmer examination scores. The time needed to complete the examination was statistically significantly shorter for these children than for children not receiving sedation (
P
< .05).

Conclusions:
Intranasal midazolam is a beneficial drug and method of delivery for the sedation of anxious children with strabismus undergoing refraction and fundus examination. Sedation prior to examination is effective in reducing the anxiety and time associated with ophthalmologic examination of children with strabismus.

J Pediatr Ophthalmol Strabismus
2005;42:355–359.
Transjugular mitral valve repair with the MitraClip: A step‐by‐step guide
Authors: Yap Jonathan , Chen Sarah , Smith Thomas W. R. , Rogers Jason H. , Singh Gagan D. 
Published: April 2020

AbstractThe MitraClip procedure is carried out almost exclusively via the transfemoral approach. However, in some patients transfemoral delivery of MitraClip is not technically feasible (e.g., occluded inferior vena cava or tortuous/obstructive iliofemoral venous anatomy). The technical considerations and challenges of the MitraClip procedure are amplified when an alternate route is considered. We describe a successful case of MitraClip performed via the right internal jugular (IJ) approach in a patient with a flail A3 scallop and previous mitral valve repair. We reviewed prior cases in the literature and discuss step‐by‐step the pertinent clinical and technical considerations for performing this procedure via the transjugular route. In summary, the right IJ access site provides a reasonable alternative to perform the MitraClip procedure in cases where femoral access is contraindicated or prohibitive. A thorough understanding of the technical considerations is crucial in improving procedural success rates.
VoterChoice: A ransomware detection honeypot with multiple voting framework
Authors: Keong Ng Chee , Rajasegarar Sutharshan , Pan Lei , Jiang Frank , Zhang Leo Yu 
Published: April 2020

SummaryThis research presents a novel framework comprising the IPS gateway, analysis system, and honeypot for identifying and detecting ransomware based on the client honeypot concept, and active interception of downloads using Suricata inline intruder prevention system. Unlike previous frameworks that report on the accuracy rate of detecting ransomware, the proposed framework features a multiple voting platform for the validation of confidence levels in the accuracy detection rates. The proposed framework achieves high accuracy levels than other machine learning models for the detection of ransomware.
Preparation of Injectable Composite Hydrogels by Blending Poloxamers with Calcium Carbonate‐Crosslinked Sodium Alginate
Authors: Xu Ningxia , Xu Jing , Zheng Xiaoyan , Hui Junfeng 
Published: April 2020

AbstractThe effects of calcium carbonate‐crosslinked sodium alginate on poloxamer hydrogels have been investigated. The mechanical strength, degradability, and thermal stability of hydrogels were characterized. The chemical and physical crosslinking in the composite hydrogels has resulted in an improvement of the compressive strength and elasticity of the hydrogels. These mixed hydrogels showed improved mechanical properties, elasticity, and stability as well as environmental responsiveness and injectability.
Probing the non-thermal emission in the Perseus cluster with the JVLA
Authors: Gendron-Marsolais M. , Hlavacek-Larrondo J. , van Weeren R. J. , Clarke T. , Fabian A. C. , Intema H. T. , Taylor G. B. , Blundell K. M. , Sanders J. S. 
Published: April 2020

AbstractWe present deep low radio frequency (230-470 MHz) observations from the Karl G. Jansky Very Large Array of the Perseus cluster, probing the non-thermal emission from the old particle population of the AGN outflows. Our observations of this nearby relaxed cool core cluster have revealed a multitude of new structures associated with the mini-halo, extending to hundreds of kpc in size. Its irregular morphology seems to have been influenced both by the AGN activity and by the sloshing motion of the cluster’ gas. In addition, it has a filamentary structure similar to that seen in radio relics found in merging clusters. These results illustrate the high-quality images that can be obtained with the new JVLA at low radio-frequencies.
Observations of nearby relativistic jets with EAVN and EATING VLBI
Authors: Hada Kazuhiro ,   EAVN/EATING VLBI Collaboration
Published: April 2020

AbstractThe international collaboration of VLBI in East Asia (EA) is rapidly growing. Besides the recent successful operation of the KVN and VERA Array (KaVA), the effort of joint VLBI operation in EA is being expanded into China. This forms the East Asian VLBI Network (EAVN), which offers detailed imaging and monitoring of the innermost regions of relativistic jets at cm wavelengths and thus complementary to the Event Horizon Telescope operated at mm wavelengths. In this contribution we present some of the ongoing KaVA/EAVN studies for the inner jets of the two important nearby radio galaxies 3C84 and M87. The observations have revealed detailed kinematics for the parsec-to-subparsec-scale structures of these jets. Future regular observations with the East-Asia-To-Italy-Nearly-Global (EATING) VLBI, a joint effort between EAVN and the Italian VLBI Network, will enable us to resolve and regularly monitor the innermost regions of nearby AGN jets at tens of micro-arcsecond scales.
Black hole demographics from TDE modeling
Authors: Mageshwaran T. , Mangalam A. 
Published: April 2020

AbstractThe occurence rate of tidal disruption events (TDEs) by survey missions depend on the black hole mass function of the galaxies, properties of the stellar cusp and mass of the central black hole. Using a power law density profile with Kroupa mass function, we solve the steady state Fokker-Planck to calculate the theoretical capture rate of stars by the black hole. Using a steady accretion model, the Schechter black hole mass function (BHMF) and the cosmological parameters, we calculate the detection rate of TDEs for various surveys which is then fit with the observed TDE rates to extract the Schechter parameters. The rate tension between observation (∼10−5yr−1) and theory (∼10−4yr−1 for individual galaxies is explained by the statistical average over the BHMF.
Survival of Population III stars
Authors: Dutta Jayanta , Sur Sharanya , Stacy Athena , Bagla Jasjeet Singh 
Published: April 2020

AbstractIn our earlier studyDutta (2016a), it has been shown that a number of primordial protostars (the ‘first stars’ in the Universe, also known as Population III or Pop III stars) are being ejected from the cluster of their origin with the velocity exceeding their escape velocity. Hence there is possibility that some of these protostars can enter main sequence and survive till present epoch, even in Milky Way. We ask the question if the protostars can avoid core collapse, and stop accreting before being ejected from the cluster, with the final mass of stars as 0.8 Mȯ.
A Photoionization Method for Estimating Black Hole Masses in Quasars
Authors: Alenka Negrete C. , Dultzin Deborah , Marziani Paola , Sulentic Jack W. , Martínez-Aldama M. L. 
Published: April 2020

AbstractWe present a method that uses photoionization codes (CLOUDY) to estimate the supermassive black hole masses (MBH) for quasars at low and high redshift. This method is based on the determination of the physical conditions of the broad line region (BLR) using observational diagnostic diagrams from line ratios in the UV. We also considered that the density and metallicity of the BLR in quasars at high z could be different from those at the nearby Universe. The computed black hole masses obtained using this method are in agreement with those derived from the method of reverberation mapping.
Bayesian Inference of Quasi‐Linear Radial Diffusion Parameters using Van Allen Probes
Authors: Sarma Rakesh , Chandorkar Mandar , Zhelavskaya Irina , Shprits Yuri , Drozdov Alexander , Camporeale Enrico 
Published: April 2020

AbstractThe Van Allen radiation belts in the magnetosphere have been extensively studied using models based on radial diffusion theory, which is derived from a quasi‐linear approach with prescribed inner and outer boundary conditions. The 1D diffusion model requires the knowledge of a diffusion coefficient and an electron loss timescale, which is typically parameterized in terms of various quantities such as the spatial (L) coordinate or a geomagnetic index (e.g., Kp). These terms are typically empirically derived, not directly measurable, and hence are not known precisely, due to the inherent nonlinearity of the process and the variable boundary conditions. In this work, we demonstrate a probabilistic approach by inferring the values of the diffusion and loss term parameters, along with their uncertainty, in a Bayesian framework, where identification is obtained using the Van Allen Probe measurements. Our results show that the probabilistic approach statistically improves the performance of the model, compared to the empirical parameterization employed in the literature.
Machine learning classification of ADHD and HC by multimodal serotonergic data
Authors: Kautzky A. , Vanicek T. , Philippe C. , Kranz G. S. , Wadsak W. , Mitterhauser M. , Hartmann A. , Hahn A. , Hacker M. , Rujescu D. , Kasper S. , Lanzenberger R. 
Published: April 2020

AbstractSerotonin neurotransmission may impact the etiology and pathology of attention-deficit and hyperactivity disorder (ADHD), partly mediated through single nucleotide polymorphisms (SNPs). We propose a multivariate, genetic and positron emission tomography (PET) imaging classification model for ADHD and healthy controls (HC). Sixteen patients with ADHD and 22 HC were scanned by PET to measure serotonin transporter (SERT‘) binding potential with [11C]DASB. All subjects were genotyped for thirty SNPs within the HTR1A, HTR1B, HTR2A and TPH2 genes. Cortical and subcortical regions of interest (ROI) were defined and random forest (RF) machine learning was used for feature selection and classification in a five-fold cross-validation model with ten repeats. Variable selection highlighted the ROI posterior cingulate gyrus, cuneus, precuneus, pre-, para- and postcentral gyri as well as the SNPs HTR2A rs1328684 and rs6311 and HTR1B rs130058 as most discriminative between ADHD and HC status. The mean accuracy for the validation sets across repeats was 0.82 (±0.09) with balanced sensitivity and specificity of 0.75 and 0.86, respectively. With a prediction accuracy above 0.8, the findings underlying the proposed model advocate the relevance of the SERT as well as the HTR1B and HTR2A genes in ADHD and hint towards disease-specific effects. Regarding the high rates of comorbidities and difficult differential diagnosis especially for ADHD, a reliable computer-aided diagnostic tool for disorders anchored in the serotonergic system will support clinical decisions.
Relationship between the drainage pattern of the dural venous sinuses and hearing recovery in patients with sudden sensorineural hearing loss
Authors: Park Jung Woo , Kim Dong Hyun , Kang Tae Kyu , Sunwoo Woongsang 
Published: April 2020

AbstractAlthough cochlear venous insufficiency has been considered to cause sudden sensorineural hearing loss (SSHL), there is insufficient clinical evidence to support this hypothesis. We sought to determine whether there is a correlation between draining patterns of the dural venous sinuses and the side of the affected ear in SSHL, as well as hearing recovery. The medical records of 109 patients diagnosed with unilateral SSHL were retrospectively reviewed. Magnetic resonance images and pure tone audiometry were performed in all patients. We measured the dominance of the inferior petrosal sinus (IPS) and transverse-sigmoid sinus (TS/SS) ipsilateral to the affected ear. Most patients were characterized by asymmetric venous drainage (IPS, 53.2%; TS/SS, 81.7%). The dominant side of the IPS or TS/SS was independent of the side of the affected ear for all patients in this study. However, in 35 patients with early recovery within 2 weeks, the dominant side of TS/SS was significantly associated with the side of the affected ear (p = 0.011). Moreover, the dominance of both the IPS and TS/SS influenced hearing outcomes at 3 months. Dominant TS/SS ipsilateral to the affected ear, particularly in the presence of ipsilateral hypoplastic IPS, is associated with a favorable hearing prognosis of SSHL.
Sigmakonduit Volvulus: eine extrem seltene Komplikation eines Sigmakonduit
Authors: Trenti Emanuela , Palermo Salvatore , Pycha Armin , Comploj Evi 
Published: April 2020

ZusammenfassungWir berichten über einen 84-jährigen Patienten mit der seltenen Diagnose eines Volvulus eines Sigmakonduits nach radikaler Zystoprostatektomie bei Harnblasenkarzinom. Unseres Wissens handelt es sich um den ersten in der Literatur beschriebenen Fall.
A Rare Case of Primary Malignant Melanoma Presenting with Lower Extremity Weakness
Authors: Alimohammadi Ehsan , Sharifi Guive 
Published: April 2020

AbstractThe authors report a pathologically confirmed case of primary malignant melanoma located in the intradural lumbosacral area, which is extremely rare due to its atypical location and manifestation. However rare, primary malignant melanoma could present as an intradural tumor and cause neurological deficit.
Associations of serum sclerostin and Dickkopf-related protein-1 proteins with future cardiovascular events and mortality in haemodialysis patients: a prospective cohort study
Authors: Stavrinou Eirini , Sarafidis Pantelis A , Loutradis Charalampos , Memmos Evangelos , Faitatzidou Danai , Giamalis Panagiotis , Koumaras Charalampos , Karagiannis Asterios , Papagianni Aikaterini 
Published: April 2020

Abstract

Background
Sclerostin and Dickkopf-related protein-1 (Dkk-1) proteins are inhibitors of the canonical Wnt/β-catenin bone pathway. Sclerostin but not Dkk-1 is associated with increased arterial stiffness. This study examined the prognostic significance of sclerostin and Dkk-1 levels for cardiovascular outcomes and mortality in haemodialysis (HD) patients.

Methods
Serum sclerostin and Dkk-1 levels were measured with enzyme-linked immunosorbent assay in 80 HD patients that were followed-up for a median of 45 months. Factors that could interfere with the association of sclerostin and Dkk-1 with outcomes [including carotid–femoral pulse wave velocity (PWV), parathyroid hormone (PTH), calcium–phosphate product and others] were assessed at baseline. The primary endpoint was a combination of all-cause death, non-fatal myocardial infarction, non-fatal stroke, coronary revascularization, hospitalization for decompensated heart failure and new-onset atrial fibrillation. Secondary endpoints included cardiovascular and all-cause mortality.

Results
Cumulative freedom from the primary endpoint was significantly lower for higher tertiles of sclerostin (77.8, 69.2 and 40.7%; Tertiles 1–3, respectively; log-rank P = 0.004). The risk for the primary outcome gradually increased for higher sclerostin tertiles [Tertile 3: hazard ratio (HR) = 3.847, 95% confidence interval (CI) 1.502–9.851]. No significant association was evident between sclerostin and all-cause mortality, whereas higher sclerostin levels presented a trend towards higher risk for cardiovascular mortality. Dkk-1 levels exhibited no association with the risk of the primary or secondary endpoints. In stepwise Cox regression modelled analysis, sclerostin levels were associated with the primary outcome, independently of PTH, calcium–phosphate product, serum albumin, C-reactive protein and PWV levels (HR = 2.921, 95% CI 1.401–6.090; P = 0.004).

Conclusions
High sclerostin levels are associated with lower cumulative freedom and higher risk for a composite endpoint of cardiovascular events and mortality. Dkk-1 exhibited no association with the future risk of adverse outcomes.