bluuebunny/crossref_metadata_2025_split huggingface dataset:
Semiparametric Inference for Proportional Mean Past Life Model
Authors: Mansourvar Z. , Asadi M. 
Published: May 2019

Abstract
The mean past lifetime provides the expected time elapsed since the failure of a subject given that he/she has failed before the time of observation. In this paper, we propose the proportional mean past lifetime model to study the association between the mean past lifetime function and potential regression covariates. In the presence of left censoring, martingale estimating equations are developed to estimate the model parameters, and the asymptotic properties of the resulting estimators are studied. To assess the adequacy of the model, a goodness of fit test is also investigated. The proposed method is evaluated via simulation studies and further applied to a data set.
Adaptive Automatic Voltage Regulation in Rural 0.38 kV Electrical Networks
Authors: Vinogradov Aleksandr , Vinogradova Alina , Golikov Igor , Bolshev Vadim 
Published: May 2019

Abstract
Development of smart grids for power supply to rural consumers assumes the creation of adaptive voltage regulation systems in 0.38 … 10 kV electrical networks as one of the directions. This paper considers a new approach to create an algorithm for controlling the technical means of regulation and voltage stabilization. The proposed adaptive voltage regulation system allows collecting and processing information on the actual voltage at the consumer inputs and automatically determine the voltage regulation coefficient. The developed mathematical model allows calculating the voltage regulation coefficient depending on the voltage at various points of the 0.38 kV electric network. In the paper there are also new methods of adaptive automatic voltage regulation in the 0.38 kV electrical networks and the requirements to the functional capabilities of this system. The article suggests technical solutions for the implementation of adaptive automatic voltage regulation system. The successful tests of experimental model of this system have been carried out.
Performance Analysis of a Non-Hermitian OFDM Optical DQPSK FSO Link over Atmospheric Turbulent Channel
Authors: Islam M. Shariful , Majumder S. P. 
Published: May 2019

Abstract
A free-space optic (FSO) system model considering non-Hermitian orthogonal frequency division multiplexing (OFDM) modulation followed by optical differential quadrature phase shift keying (DQPSK) modulation is proposed. Analysis is presented for an OFDM-DQPSK FSO link considering an optical direct detection receiver based on dual detection optical QPSK demodulator. Analytical approach is developed to find the expressions for output current and signal to noise ratio (SNR) in presence of atmospheric turbulence. The conditional bit error rate (BER) for a given turbulence-induced fading is also derived. Average SNR and BER are obtained considering the turbulence-induced fading to be log-normal distribution. Results are evaluated in terms of average SNR and BER for different link distances, number of OFDM subcarriers, background current and different wavelengths. It is noticed that the proposed OFDM FSO system suffers 4 and 1.4 dB power penalty at a BER of 10−12 due to the effect of atmospheric turbulence and background radiation respectively for 512 number of OFDM subcarrier and link distance of 2,000 m. Comparison of the results is made with simulation results as well as experimental results reported earlier. The proposed OFDM FSO system provides better performance, with an almost 3 dB improvement in receiver sensitivity compared to the experimental results on OFDM-QPSK FSO link reported earlier at a BER of 10−6. Finally, the analytical results are verified by numerical simulation.
On Partitions and Arf Semigroups
Authors: Tutaş Nesrin 
Published: May 2019

Abstract
In this study we examine some combinatorial properties of the Arf semigroup. In previous work, the author and Karakaş, Gümüşbaş defined an Arf partition of a positive integer n. Here, we continue this work and give new results on Arf partitions. In particular, we analyze the relation among an Arf partition, its Young dual diagram, and the corresponding rational Young diagram. Additionally, this study contains some results that present the relations between partitions and Arf semigroup polynomials.
Arithmetic properties for Andrews’ (48,6)- and (48,18)-singular overpartitions
Authors: Liu Eric H. , Du Wenjing 
Published: May 2019

Abstract
Singular overpartition functions were defined by Andrews. Let Ck,i(n) denote the number of (k, i)-singular overpartitions of n, which counts the number of overpartitions of n in which no part is divisible by k and only parts ±i (mod k) may be overlined. A number of congruences modulo 3, 9 and congruences modulo powers of 2 for Ck,i(n) were discovered by Ahmed and Baruah, Andrews, Chen, Hirschhorn and Sellers, Naika and Gireesh, Shen and Yao for some pairs (k, i). In this paper, we prove some congruences modulo powers of 2 for C48, 6(n) and C48, 18(n).
A severe complication of myocardial dysfunction post radiofrequency ablation treatment of huge hepatic hemangioma: a case report and literature review
Authors: Gao Jun , Xu Li , Yang Meng-meng , Ke Shan , Ding Xue-mei , Wang Shao-hong , Sun Wen-bing 
Published: May 2019

Abstract
In recent years, radiofrequency (RF) ablation has been increasingly used for treating hepatic hemangiomas attributing to its unique advantages, such as minimal invasiveness, definite efficacy, high safety, fast recovery, and wide applicability. However, complications related to RF ablation had been frequently reported, especially while being used for treating huge hemangioma (≥10 cm). Cautious measures had been taken to prevent the incidence of ablation-induced complications, but still unexpected complications occurred. Herein we reported a case of severe myocardial dysfunction along with systemic inflammatory response syndrome occurring immediately post RF ablation of a 10.7 cm hemangioma. This serious complication was effectively managed by supportive care with the full recovery in a short period of time.
1.5 μm photoluminescence and upconversion photoluminescence in GeGaAsS:Er chalcogenide glass
Authors: Prokop Vit , Strizik Lukas , Oswald Jiri , Vlcek Milan , Benes Ludvik , Yannopoulos Spyros N. , Frumarova Bozena , Wagner Tomas 
Published: May 2019

Abstract
The paper reports on ≈1.5 μm Stokes photoluminescence (PL) emission and upconversion photoluminescence (UCPL) emission in the visible and near-infrared spectral region in Er3+-doped Ge25Ga8As2S65 chalcogenide glasses at pumping wavelengths of 980 and 1550 nm. The ≈1.5 μm PL emission spectra are broadened with increasing concentration of Er ions which is discussed in terms of radiation trapping and UCPL dynamics affecting the Er3+: 4
I
13/2 level lifetime. The UCPL emission was observed at ≈530, ≈550, ≈660, ≈810 and ≈990 nm and its overall intensity as well as red-to-green UCPL emission intensity ratio increases with increasing Er concentration. To explore the UCPL dynamics we measured double logarithmic dependency of green (≈550 nm) and red (≈660 nm) UCPL emission versus pump power at pumping wavelength of 975 nm. Moreover, we measured quadrature frequency resolved spectroscopy (QFRS) on green UCPL emission (≈550 nm) using 975 nm pumping wavelength and various excitation powers. The QFRS spectra on green UCPL were analyzed in term of QFRS transfer function for three-level model from which we deduced energy transfer upconversion rate w
11 (s−1) originating from Er3+: 4
I
11/2, 4
I
11/2→4
F
7/2, 4
I
15/2 transitions.
Focus Fronting in Spanish: Mirative implicature and information structure
Authors: Cruschina Silvio 
Published: May 2019

AbstractIn Romance, Focus Fronting (FF) is generally related to a contrastive or corrective function. In this paper, I show that Spanish may resort to FF to express a special evaluative meaning, namely, a mirative (conventional) implicature of surprise and unexpectedness. Mirative FF is problematic for the traditional analyses of FF because it is not necessarily contrastive and does not guarantee the traditional articulation of the sentence into a new and a given part. The results of a syntactic experiment on the distribution and interpretation of FF in European Spanish show that speakers accept FF not only in the corrective but also in the mirative context. The acceptability of mirative FF thus proves that FF in Spanish is not exclusively limited to contrast or linked to information-structural requirements such as the new-old information distinction. FF may also be used to express a mirative implicature that requires a set of focal alternatives in order to be interpreted correctly.
Kalibrierfreie 3D-Rekonstruktion von gekrümmten Oberflächen mittels orthographischer Projektion unter Verwendung von Reflexionsmarkern
Authors: Negara Christian , Längle Thomas , Beyerer Jürgen 
Published: May 2019

Zusammenfassung
Die optische Vermessung gekrümmter Oberflächen erfolgt meist über problemspezifische Messverfahren und Algorithmen zur 3D-Rekonstruktion, die an die optischen Eigenschaften der zu untersuchenden Oberfläche angepasst sind. In diesem Artikel wird ein Verfahren zur 3D-Rekonstruktion von Freiformflächen vorgestellt, das das Oberflächenrelief in einem telezentrischen Strahlengang mit einer telezentrischen Abbildungsoptik und einer koaxialen telezentrischen Beleuchtung erfasst. Die untersuchte Oberfläche des Prüflings kann dabei texturiert oder untexturiert und transparent, spiegelnd oder diffus sein. Die Oberfläche wird dabei nicht direkt vermessen, sondern mittels darauf aufgebrachter retroreflektierender Marker rekonstruiert. Da zwischen den Markern keine Messwerte vorliegen, können nur Oberflächen rekonstruiert werden, die eine örtliche Glattheit aufweisen. Mit einem Verfahren für monokulares Stereo werden aus einer Bildserie simultan sowohl die Kameraposen als auch die 3D-Koordinaten der Reflexionsmarker berechnet. Die sonst übliche Kalibrierung der extrinsischen Kameraparameter entfällt. Anschließend wird eine parametrische B-Spline-Oberfläche gefittet, aus der sowohl das Oberflächenrelief als auch die Oberflächennormalen berechnet werden können.
Supramolecular assembly of two copper(II) coordination compounds of topiroxostat with dialkylformamide ligands
Authors: Jiang Li-Ting , Chang Xiang , Chen Sheng-Chun , Feng Xue-Jun , Chen Qun 
Published: May 2019

Abstract
A well-known selective xanthine oxidase inhibitor topiroxostat, 4-[3-(4-pyridinyl)-1H-1,2,4-triazol-5-yl]-2-pyridinecarbonitrile (ptpc), was selected to react with Cu(NO3)2 · 3H2O in dialkylformamide solvents, affording two novel supramolecular coordination compounds [Cu(ptpc)2(NO3)(DMF)2] · NO3 (1) and Cu(ptpc)2(NO3)2(DEF)2 (2). Single-crystal X-ray diffraction revealed that compound 1 crystallizes in the monoclinic space group C2/c. The components are assembled to a 3D supramolecular framework through hydrogen-bonding interactions between the large [Cu(ptpc)2(NO3)(DMF)2]+ cationic moieties and the nitrate anions. Compound 2 crystallizes in the triclinic space group P1̅ and shows a 2D hydrogen-bonded network structure. The results clearly indicate that dialkylformamide solvents with different sizes have an important influence on the structures of the complexes. The luminescence properties of 1 and 2 in the solid state and their thermal stabilities were also investigated.
Experimental Study of Residual Stresses in Hybrid Laser Arc and Submerged Arc-Welded 10-mm-Thick Low-Carbon Steel Plates
Authors: Andreassen Michael Joachim , Yu Zhenzhen , Bunn Jeffrey R. , Nielsen Jens Henrik 
Published: May 2019

Abstract
Offshore structures are constantly exposed to a multihazard marine environment that threatens their structural integrity. This imposes a high risk for extensive structural failures while various deterioration mechanisms may degrade the available capacity of the structures. Thus, no reliable decisions can be reached regarding design, operation, and survivability of the structures unless a deep comprehension of their fatigue performance is available, including welding-induced residual stresses. In particular, the continuous increase in size of the weldments for the offshore wind industry needs special attention with regard to welding-induced residual stresses, as they can reduce fatigue life, promote distortion, and contribute to stress corrosion cracking. Thus, the current design methods and increased structural dimensions as well as new design and manufacturing methods need to be inspected, understood, and optimized. Related to this, there is a growing need for evaluation of the effect of welding methods with various heat input density distributions. This article deals with the influence of welding method on the welding-induced residual stresses in 10-mm-thick low-carbon structural steel plates. The residual stresses are investigated in hybrid laser-arc welded and submerged arc butt-welded steel plates by means of experimental temperature profile measurements and neutron diffraction measurements and in accordance with existing production procedures. The residual stresses were measured at three different depths in the plates. The goal of the analysis is to gain a comprehensive understanding of the distribution and development of residual stresses in relation to the welding method for better control of the residual stresses and distortion. The repeatability of the neutron diffraction measurements is also investigated and reported in this article.
Expression Signatures of Cisplatin- and Trametinib-Treated Early-Stage Medaka Melanomas
Authors: Klotz Barbara , Kneitz Susanne , Lu Yuan , Boswell William , Postlethwait John , Warren Wesley , Walter Ronald B , Schartl Manfred 
Published: May 2019

AbstractSmall aquarium fish models provide useful systems not only for a better understanding of the molecular basis of many human diseases, but also for first-line screening to identify new drug candidates. For testing new chemical substances, current strategies mostly rely on easy to perform and efficient embryonic screens. Cancer, however, is a disease that develops mainly during juvenile and adult stage. Long-term treatment and the challenge to monitor changes in tumor phenotype make testing of large chemical libraries in juvenile and adult animals cost prohibitive. We hypothesized that changes in the gene expression profile should occur early during anti-tumor treatment, and the disease-associated transcriptional change should provide a reliable readout that can be utilized to evaluate drug-induced effects. For the current study, we used a previously established medaka melanoma model. As proof of principle, we showed that exposure of melanoma developing fish to the drugs cisplatin or trametinib, known cancer therapies, for a period of seven days is sufficient to detect treatment-induced changes in gene expression. By examining whole body transcriptome responses we provide a novel route toward gene panels that recapitulate anti-tumor outcomes thus allowing a screening of thousands of drugs using a whole-body vertebrate model. Our results suggest that using disease-associated transcriptional change to screen therapeutic molecules in small fish model is viable and may be applied to pre-clinical research and development stages in new drug discovery.
Female Genetic Contributions to Sperm Competition in Drosophila melanogaster
Authors: Chen Dawn S , Delbare Sofie Y N , White Simone L , Sitnik Jessica , Chatterjee Martik , DoBell Elizabeth , Weiss Orli , Clark Andrew G , Wolfner Mariana F 
Published: May 2019

Abstract
There is extensive variation in males for sperm competitive abilities, and in females for the ability to distinguish among sperm from different males. But it is still not known how females distinguish males...
In many species, sperm can remain viable in the reproductive tract of a female well beyond the typical interval to remating. This creates an opportunity for sperm from different males to compete for oocyte fertilization inside the female’s reproductive tract. In Drosophila melanogaster, sperm characteristics and seminal fluid content affect male success in sperm competition. On the other hand, although genome-wide association studies (GWAS) have demonstrated that female genotype plays a role in sperm competition outcome as well, the biochemical, sensory, and physiological processes by which females detect and selectively use sperm from different males remain elusive. Here, we functionally tested 26 candidate genes implicated via a GWAS for their contribution to the female’s role in sperm competition, measured as changes in the relative success of the first male to mate (P1). Of these 26 candidates, we identified eight genes that affect P1 when knocked down in females, and showed that five of them do so when knocked down in the female nervous system. In particular, Rim knockdown in sensory pickpocket (ppk)+ neurons lowered P1, confirming previously published results, and a novel candidate, caup, lowered P1 when knocked down in octopaminergic Tdc2+ neurons. These results demonstrate that specific neurons in the female’s nervous system play a functional role in sperm competition and expand our understanding of the genetic, neuronal, and mechanistic basis of female responses to multiple matings. We propose that these neurons in females are used to sense, and integrate, signals from courtship or ejaculates, to modulate sperm competition outcome accordingly.
Benignus multicysticus peritonealis mesothelioma
Authors: György Alpár , Schmal Ferenc , Szabó Huba , Tóth Lajos Barna , Lukovich Péter 
Published: May 2019

Abstract: Benign multicystic peritoneal mesothelioma is a rare benign tumor originating from the peritoneum, affecting mostly young, fertile women. Its presentation is non-specific, thus the final diagnosis is made after the histological examination. A young female patient presented with incarcerated inguinal hernia of which an emergency surgery was performed. During the operation a cystic mass neighboring the round ligament in the canal of Nuck was removed. No inguinal hernia was found. The histological examination confirmed the diagnosis of benign multicystic mesothelioma. The patient was referred to a center performing hyperthermic intraperitoneal chemotherapy, where laparoscopic exploration was performed. The second surgery revealed no residual tumor or any other pathology. A 41-year-old male patient, 4 years before presenting at our ward, had an elective umbilical hernia repair surgery. During the operation 2 cm big cystic mass was removed from the peritoneum, and the histological examination revealed benign multicystic mesothelioma. In 2018, acute surgery was performed due to a periappendicular abscess, while during the surgery a multicystic mass situated on the distal end of the appendix was also removed. The pathological finding confirmed the recurrence of the first tumor. The radiological examination did not find any signs of residual tumor mass anywhere else. The chances of malignant transformation in cases of benign multicystic peritoneal mesothelioma are low. The suggested treatment is en bloc surgical removal of the mass, however, in these cases recurrence is still 50%. If during follow-ups the recurrence of the tumor is found, a total peritonectomy or hyperthermic intraperitoneal chemotherapy is advisable. Orv Hetil. 2019; 160(21): 839–843.
Generalizált epilepszia hátterében azonosított ioncsatorna-génmutáció ritka formája
Authors: Till Ágnes , Szalai Renáta , Hegyi Márta , Kövesdi Erzsébet , Büki Gergely , Hadzsiev Kinga , Melegh Béla 
Published: May 2019

Abstract: The advances in molecular genetic methods has lead to the discovery of the genetic alterations that underlie the etiology of most diseases previously held to be idiopathic. Targeted genetic examination of a pediatric male patient showing a normal intellect, an extended area of skin hypopigmentation, and suffering from generalized epilepsy displaying a switch in epilepsy syndrome during the course of the disease towards a neurocutaneous syndrome was unsuccessful. Whole-exome sequencing identified a heterozygous missense mutation in a potassium chloride cotransporter gene, which together with the phenotype underscores the diagnosis of an epilepsy syndrome known in the literature as idiopathic generalized epilepsy type 14. Orv Hetil. 2019; 160(21): 835–838.
The comparative analysis of the effectiveness of stimulation of liver regeneration by bone marrow cells and total RNA of these cells
Authors: Gonikova Z. Z. , Nikolskaya A. O. , Kirsanova L. A. , Shagidulin M. Yu. , Onishchenko N. A. , Sevastianov V. I. 
Published: May 2019

Extensive liver resection (ELR), performed in a number of surgical operations, refers to a critical injury, which necessitates the improvement of methods of therapy of acute post-resection liver failure.Aim:to compare the effectiveness of stimulation of regenerative processes in the liver residue after ELR (60–70%) by intraperitoneal administration of lysed aspirate bone marrow cells (BMCs) and total RNA (tRNA) isolated from BMCs.Materials and methods.This work was performed on 175 rats-male Wistar breed 250–300 g, on 75 of which under the inhalation anesthesia it was reproduced the model of the ELR in three groups of experiments: group 1 – control (administration of isotonic solution after ELR), group 2 – in 3–5 hours after ELR the tRNA from BMCs was intraperitoneally injected at a dose of 30 μg/100 g, group 3 – in 3–5 hours after ELR BMCs was administered intraperitoneally at a dose of 30–35 × 106cells per rat. Comparative studies of the restorative processes in the liver after the ELR in the three groups were carried out by dynamic control of the mitotic activity of hepatocytes in the liver residue, cytolytic enzymes, total bilirubin and total serum protein, as well as the liver residue (mass) weight.Results.The tRNA from BMCs and BMCs in the indicated doses prevent the risk of the development of lethal outcomes, and also contribute to an earlier (by 10–14 days) normalization of the functional indices of hepatic homeostasis. However, the tRNA from BMCs, compared with BMCs, has a stronger stimulating effect on the recovery processes: it promotes earlier intensification of mitotic activity of hepatocytes and provides a higher rate of recovery of liver mass.Conclusion.For the induction of recovery processes in the liver residue after ELR, the preference should be given to the tRNA from BMCs.