bluuebunny/crossref_metadata_2025_split huggingface dataset:
Daytime perimeter environmental noise in the vicinity of four hospitals in the city of Lima, Peru
Authors: García-Rivero Alberto E. , Yuli-Posadas Ricardo Ángel , Romero Warren Reátegui , Sánchez-Ccoyllo Odón , Bulege-Gutierrez Wilfredo , Tasayco Humberto Guillermo Garayar , Fernández-Gusmán Victor 
Published: November 2020

Abstract
The present study is intended to get to know the levels of perimeter diurnal environmental noise of four hospitals in the city of Lima. The measurement mode used at each hospital was A-weighting, with an integration time of five minutes per recording. It was measured in the FAST mode with calibrations made at the beginning and end of the measurement day. Statistical analysis consisted of the mean comparison T test which was applied at all the hospitals considered in the study. At the four hospitals, at all the hours of measurement and both on working days and non-working days (Sunday), LAeq mean values are higher than 83 dBA. On working days, two periods of maximum noise from 08:00 to 10:00 in the morning and from 17:00 to 19:00 in the afternoon coincide with the start and end of working hours. The perimeter diurnal environmental noise levels determined at the vicinity of four hospitals show higher values in all cases to those established by the Peruvian National Environmental Standards for Noise for special protection areas both for working days and for non-working days. Noise that comes from the dense and disorganized traffic of Lima plays a fundamental role in this behaviour.
Microstructure and mechanical properties of brazing joint of silver-based composite filler metal
Authors: Yu Hua , Zhang Liangliang , Cai Fangfang , Zhong Sujuan , Ma Jia , Bao Li , Jiu Yongtao , Hu Bingli , Wei Shizhong , Long Weimin 
Published: November 2020

Abstract
In this article, environmental friendly BAg25Cu40Zn34Sn (BAg-25) and BAg30Cu37Zn32Sn (BAg-30) flux-core solder metal capable of facilitating automatic production of brazing manufacturing processes were prepared. The butt and lap induction brazing tests were carried out on the substrate with BAg-25 and BAg-30. Wettability, microstructure and mechanical properties of the solders on the base metal were studied by field emission scanning electron microscope (SEM-EDS), electron backscattering diffraction (EBSD), tensile testing machine and microhardness tester. Results indicated that the wetting property of BAg-30 with 30% silver content was better than that of BAg-25 with 25% silver content. At the same time, besides copper and silver-based solid solutions, the brazed joint of BAg-30 solder also contain Cu + Ag eutectic phase. In the brazed joint of BAg-25 solder, the grain size is smaller, which makes the tensile strength and the shear strength of the joints better. Therefore, the BAg-25 flux-core solder metal will further reduce the industrial cost and meet the requirements of mechanical properties.
Energetic and exergetic analysis of a convective drier: A case study of potato drying process
Authors: Golpour Iman , Kaveh Mohammad , Chayjan Reza Amiri , Guiné Raquel P. F. 
Published: November 2020

Abstract
This research work focused on the evaluation of energy and exergy in the convective drying of potato slices. Experiments were conducted at four air temperatures (40, 50, 60 and 70°C) and three air velocities (0.5, 1.0 and 1.5 m/s) in a convective dryer, with circulating heated air. Freshly harvested potatoes with initial moisture content (MC) of 79.9% wet basis were used in this research. The influence of temperature and air velocity was investigated in terms of energy and exergy (energy utilization [EU], energy utilization ratio [EUR], exergy losses and exergy efficiency). The calculations for energy and exergy were based on the first and second laws of thermodynamics. Results indicated that EU, EUR and exergy losses decreased along drying time, while exergy efficiency increased. The specific energy consumption (SEC) varied from 1.94 × 105 to 3.14 × 105 kJ/kg. The exergy loss varied in the range of 0.006 to 0.036 kJ/s and the maximum exergy efficiency obtained was 85.85% at 70°C and 0.5 m/s, while minimum exergy efficiency was 57.07% at 40°C and 1.5 m/s. Moreover, the values of exergetic improvement potential (IP) rate changed between 0.0016 and 0.0046 kJ/s and the highest value occurred for drying at 70°C and 1.5 m/s, whereas the lowest value was for 70°C and 0.5 m/s. As a result, this knowledge will allow the optimization of convective dryers, when operating for the drying of this food product or others, as well as choosing the most appropriate operating conditions that cause the reduction of energy consumption, irreversibilities and losses in the industrial convective drying processes.
Seasonal normalized difference vegetation index responses to air temperature and precipitation in Baghdad
Authors: Naif Salwa S. , Mahmood Dalia A. , Al-Jiboori Monim H. 
Published: November 2020

Abstract
The spatial distribution of urban vegetation cover is strongly related to climatological conditions, which play a vital role in urban cooling via shading and reducing ground surface temperature and effective strategy in mitigation urban heat island. Based on the Landsat satellite images, the quantitative normalized difference vegetation index (NDVI) was spatially mapped at two times for each year during 2008, 2013, 2019 in Baghdad. The NDVI values ranged from −1 to +1 with considering values larger than 0.2 indicate the dense healthy vegetation. In this study, the fractional areas of NDVI >0.2 were computed with their percentage. The responses of the NDVI during the growing seasons to two climate indices (i.e., air temperature and precipitation) were investigated. These climatic data obtained from the Iraqi Meteorological Organization and Seismology for the aforementioned years were used to explore the potential correlations between seasonal NDVI and above climate variables. The result shows that NDVI-derived vegetation growth patterns were highly correlated with their recording during the current growth seasons.
Mineral fertilizer use in land-scarce conditions: Case of Rwanda
Authors: Mugabo Josaphat Rusisiro , Tollens Eric , Chianu Jonas Nwankwo , Vanlauwe Bernard 
Published: November 2020

Abstract
This study was undertaken to investigate the use of mineral fertilizer by smallholder farmers in order to understand the set of factors influencing the decisions of smallholder farmers to use fertilizers in land-scarce conditions. Using descriptive analysis and the Cragg’s double-hurdle model, the study identified and analyzed factors that determine smallholder farmer adoption of mineral fertilizers and those that affect the intensity of household mineral fertilizer use. From factors that only influence the decision of smallholder farmers to use mineral fertilizers, distance to fertilizer market and livestock affects it negatively; while farmer association membership, landholding per capita, access to extension services and the size of household affect it positively. The variable “domestic assets” which is a proxy variable for smallholder farmers’ wealth affects only the intensity of use of mineral fertilizers. Literacy of head of household, share of potatoes sold and extension services have an effect on the probability of adoption and intensity of mineral fertilizer use. Improving smallholder farmers’ access to information (extension services and education) and increasing mineral fertilizer profitability through improving agricultural commodity markets are essential for raising both the adoption of mineral fertilizers and the extent of mineral fertilizer use among smallholder farmers in Rwanda.
High-power density induction machines with increased windings temperature
Authors: Laidoudi Aicha , Duchesne Stéphane , Morganti Fabrice , Velu Gabriel 
Published: November 2020

AbstractThe increase of the operating temperature of electrical machines is a major challenge in the context of the large-scale use of electricity in many industrial or individual applications such as mobility. Indeed, working at higher temperatures makes it possible to place electrical actuators in critical areas – such as aircraft engines, for example – and/or to significantly improve the power-to-weight ratio of the machine. For several applications (deep pumping, ventilation, etc.), the use of the induction machine is still preferred due to cost, simplicity and robustness essentially. The objective of this study is to estimate the possibilities of making a high-temperature squirrel cage induction machine. A significant increase in the operating temperature of a machine would indirectly allow us to envisage an increase in the current density in the active conductors and thus a significant improvement in the power-to-weight ratio. However, this is at the sacrifice of efficiency. The aim of this study is to evaluate this decrease in efficiency correlated with the increase in the temperature to find the best compromise according to the relevant applications. An analytic sizing model has been proposed for the prediction of losses, which will be coupled with a thermal model to predict the temperature in different parts of the machine. This study presents essential information on the influence of temperature on the parameters important for the performance of an induction machine.
Analytical study of air-gap surface force – application to electrical machines
Authors: Pile Raphaël , Le Besnerais Jean , Parent Guillaume , Devillers Emile , Henneron Thomas , Le Menach Yvonnick , Lecointe Jean-Philippe 
Published: November 2020

AbstractThe Maxwell stress tensor (MST) method is commonly used to accurately compute the global efforts, such as electromagnetic torque ripple and unbalanced electromagnetic forces in electrical machines. The MST has been extended to the estimation of local magnetic surface force for the vibroacoustic design of electrical machines under electromagnetic excitation. In particular, one common air-gap surface force (AGSF) method based on MST is to compute magnetic surface forces on a cylindrical shell in the air gap. However, the AGSF distribution depends on the radius of the cylindrical shell. The main contribution of this study is to demonstrate an analytic transfer law of the AGSF between the air gap and the stator bore radius. It allows us to quantify the error between the magnetic surface force calculated in the middle of the air gap and the magnetic force computed on the stator teeth. This study shows the strong influence of the transfer law on the computed tangential surface force distribution through numerical applications with induction and synchronous electrical machines. Finally, the surface force density at stator bore radius is more accurately estimated when applying the new transfer law on the AGSF.
Atomistic insight into the significantly enhanced photovoltaic cells of monolayer GaTe2
via two-dimensional van der Waals heterostructures engineering
Authors: Opoku Francis , Govender Penny P. 
Published: November 2020

Abstract
Designing new van der Waals (vdW) heterostructures from various two-dimensional transition metal dichalcogenides (TMDs) materials shows outstanding properties, such as an ultrafast charge transfer process and strong interlayer interactions by combining the advantageous properties of the different TMD materials. In this study, using the density functional theory method, we systemically investigate the optical property, band alignment, electronic structures, interface charge transfer, mechanical properties and stability of MTe2/GaTe2 (M = Mo and W) vdW heterostructures as promising photovoltaic solar cells materials. In this work, gallium telluride and MTe2 were used as acceptors and donors in high-quality photovoltaic cells. The calculated binding energies suggest that they were energetically favourable and relatively easy to fabricate under suitable conditions. Moreover, the heterostructures possess exceptional characteristics of enhanced visible light absorption edge (∼104 cm−1), type-II band alignment and strong charge separation. The suitable band alignment leads to maximum power conversion efficiency (PCE) of 22.43 and 22.91%, respectively, which was quite promising for photovoltaic solar cells. The high PCE could be due to the internal built-in electric field at the MTe2/GaTe2 interface, which induces efficient separation of charge carriers. This work offers theoretical support for the design and prediction of next-generation low-cost, highly efficient and promising materials for solar device applications.
Investigation of natural radionuclide and essential metal contents of ancient wheat einkorn (Triticum monococcum L.) grown in Turkey
Authors: Sultan Dalal A.O. , Turhan Şeref , Kurnaz Aslı , Hançerlioğulları Aybaba , Kamberli Arzu K. , Emeksizoğlu Burcu 
Published: November 2020

Abstract
Einkorn (Triticum monococcum L.) is accepted as the oldest known wheat. In this study, the natural radionuclide and essential metal contents of siyez samples collected from 21 different cultivation areas in Kastamonu province located in the Western Black Sea region of Turkey were determined by using non-destructive analytical methods. The average activity concentrations of 40K, 226Ra and 232Th measured in siyez samples using a gamma-ray spectrometry were found as 181.3 ± 4.1, 10.0 ± 0.7 and 6.1 ± 0.2 Bq kg−1, respectively. The average annual effective radiation dose that the people are exposed to due to the consumption of siyez samples was estimated as 68.2 ± 3.1 µSv y−1. The average concentrations of Cr, Mn, Fe, Co, Ni, Cu and Zn essential trace metals analyzed in einkorn samples using EDXRF spectrometry were found as 3.6 ± 0.2, 89.2 ± 1.2, 208.5 ± 62.6, 16.8 ± 0.6, 12.1 ± 0.1, 8.3 ± 0.2 and 65.3 ± 2.5 mg kg−1, respectively.
Analysis of the impact of left ventricular assist devices on the systemic circulation
Authors: Simakov Sergey S. , Timofeev Alexander E. , Gamilov Timur M. , Kopylov Philipp Yu. , Telyshev Dmitry V. , Vassilevski Yuri V. 
Published: November 2020

AbstractIn this work we analyze the impact of left ventricular assist devices on the systemic circulation in subjects with heart failure associated with left ventricular dilated cardiomyopathy. We use an integrated model of the left heart and blood flow in the systemic arteries with a left ventricular assist device. We study the impact of the rotation speed of the pump on haemodynamic characteristics of distal arteries. We identify the rotation speed for simultaneous recovery of the healthy average values in all systemic arteries, the heart and the aorta. Our numerical experiments show that blood distribution over the graph of systemic vessels does not depend on flow regimes in ascending aorta. We also observe that the optimal pump rotation speed changes in the atherosclerotic vascular network and depends on stenoses localization.
The “material function” in cinema: Resolving the paradox of the glitch
Authors: Betancourt Michael 
Published: November 2020

Abstract
Glitches pose expressive challenges for digital motion pictures. These problematics reveal a “material function” that determines their identification and prescribes their semantics on-screen. These issues of materiality are familiar from the ideological critiques of avant-garde film in the 1970s, but have not been explored in relation to the semiotics of digital cinema. Developing an understanding of these problematics shows the complex problematics of using glitches for critical and expressive purposes in motion pictures.
Smart objects in daily life: Tackling the rise of new life forms in a semiotic perspective*
Authors: Finocchi Riccardo , Perri Antonio , Peverini Paolo 
Published: November 2020

Abstract
Our everyday life is increasingly permeated with digital objects that carry out smart and complex functions. The latest (but certainly not final) advancement of smart digital applications – is to be identified the creation of a field, at once conceptual and material, of things denominated smart objects (henceforth SOs). This technological evolution is so pervasive that it is referred to as smartification. Smart objects have some distinctive features including in particular varying degrees of agency, autonomy and authority. There is no doubt that the SO category is extremely broad, various and intrinsically fuzzy, it is evident that the phenomenon is by no means easy to define: which objects are really smart and which are not? But above all: what do we mean in semio-linguistic, and not psychological nor merely phenomenological terms, when we attribute the qualifier smart to an artifact? What is clear is that a new, or at least different (and controversial) relationship is developing between objects and subjects, or rather between human beings and objects inhabiting the spaces of social action: that is, a new system of objects, to cite Baudrillard (1968), or a new “society of objects” (see Landowski and Marrone 2002). In this paper we will focus on a type of smart physical device designed to interact with its users in the domestic sphere, assisting them in a variety of tasks – such as for example Amazon Echo, capable of connecting to Alexa, an intelligent personal assistant based on machine learning, or the more recent Google Assistant. Our semiotic-oriented – or, more precisely, potentially socio-semiotic/ethno-semiotic – analysis will deal with these issues theoretically by concentrating on the problem of identity, which is anthropologically, but also and above all philosophically, sensitive. We shall look at the impact of technological devices on the perceptive/cognitive systems of human beings, starting with a reflection on the practices of interaction, signification and interpretation that also involve digital objects with a possible impact on everyday life.
Expression level of miRNAS in patients with gestational diabetes
Authors: Balci Senay , Gorur Aysegul , Derici Yıldırım Didem , Cayan Filiz , Tamer Lulufer 
Published: November 2020

Abstract

Background
Gestational diabetes mellitus (GDM), which has been identified for the first time during pregnancy and is defined as glucose intolerance of varying degrees, is one of the prediabetes states that are at risk for developing type 2 diabetes. MicroRNAs (miRNAs) are associated with pregnancy complications and are even necessary for the regulation of pancreatic development and glucose-induced insulin secretion. This study aims to investigate miRNAs expressed in maternal plasma to detect the availability as a biomarker in the diagnosis of GDM.

Methods
In this study, 30 pregnant women with GDM diagnosed according to GDM American Diabetes Association criteria and 30 healthy pregnant women were included and miRNA expression levels were investigated. Circulating 39 miRNAs were analyzed by qRT-PCR using 96.96 Dynamic Array IFCs.

Results
The findings showed that the expression level of miR-7-5p significantly upregulated when compared with healthy pregnant women with gestational diabetes (fold change:2.3, p<0.05).

Conclusions
There is controversy about what is the most appropriate test for GDM screening. Therefore, supported by further studies, miR-7-5p can be used for the diagnosis of GDM.
Modified hemispherectomy for infantile hemiparesis and epilepsy
Authors: Li Yu-Hui , Li Dong-Sheng , Wang Mei-Qing , Zhao Kai , Gao Bu-Lang 
Published: November 2020

Abstract

Objective
To investigate the effect and medical imaging of modified hemispherectomy on patients with infantile hemiparesis and medically refractory epilepsy.

Patients and methods
Forty-three patients with infantile hemiparesis and refractory epilepsy who underwent hemispherectomy were enrolled. The treatment effect and medical imaging were analyzed.

Results
Anatomical hemispherectomy was successfully performed in all patients (100%). In all patients, the muscular tension decreased and the contracted limbs relaxed. In the pathological examination of the resected brain tissue, secondary cicatricial gyri with concomitant cortical dysplasia was present in 36 cases and polycerebellar gyrus malformation and porencephalia in the other 7 cases. Followed up for 7–15 years (mean 11.3), all patients were alive without a long-term sequela. Epilepsy was satisfactorily controlled, with complete seizure relief in 39 cases (91%) classified as Engel I and basic control in the other 4 (9%) defined as Engel II. The posthemispherectomy medical imaging demonstrated that the intracranial space on the operative side shrank, and the healthy cerebral hemisphere shifted markedly toward the hemispherectomy side, with expanded lateral ventricle on the healthy side and thickened skull and enlarged frontal sinus on the operative side. After 4–5 years, the intracranial space on the operative side disappeared in 75% of the patients, demonstrating enlarged cerebral peduncle on the healthy side.

Conclusion
Further modified hemispherectomy in patients with infantile hemiparesis and medically refractory epilepsy demonstrated markedly ameliorated effects on epilepsy control and the prevention of superficial cerebral hemosiderosis in the long-term follow-up.
Aestheticscapes und joint speech als ästhetische Strategie
Authors: Koch Anne 
Published: November 2020

Zusammenfassung
Der Beitrag erläutert anhand von zwei Aestheticscapes einer charismatischen katholischen Gemeinschaft, wie mit unterschiedlichen ästhetischen Strategien das Erleben beeinflusst wird. Das hat zur Folge, dass die religiöse Botschaft multimedial intensiv und nachhaltig bei den Teilnehmenden verankert wird. Zentrale und in der Literatur schon gut belegte These ist, dass dies über den Zustand einer Absorption stattfinden kann. In den beiden Ritualsequenzen der Fallbeispiele sind es jeweils unterschiedliche Elemente aus den multimodalen Aestheticscapes, die den hypnotischen Zustand einführen, und unterschiedliche semantische Inhalte, die auf diese Weise in den ästhetischen Subjekten verankert werden. Wegen dieser impliziten ästhetischen Regulierung (governance) von Subjekten verändert das Ritual die Subjektivierungsform der Teilnehmenden und macht die kritische Analyse religionswissenschaftlich so geboten. Neu eingeführt wird als religionsästhetisches Konzept joint speech für die Analyse des Fürbittgebets für Stimme, Tönen, Sprechen, Singen allgemein.
Synthesis, structural characterization and catalytic activity of chlororuthenium(II) complexes with substituted Schiff base/phosphine ancillary ligands
Authors: Chen Chong , Wu Fule , Ji Jiao , Jia Ai-Quan , Zhang Qian-Feng 
Published: November 2020

Abstract
Treatment of [(η
6-p-cymene)RuCl2]2 with one equivalent of chlorodiphenylphosphine in tetrahydrofuran at reflux afforded a neutral complex [(η
6-p-cymene)RuCl2(κ
1-P-PPh2OH)] (1). Similarly, the reaction of [Ru(bpy)2Cl2·2H2O] (bpy = 2,2′-bipyridine) and chlorodiphenylphosphine in methanol gave a cationic complex [Ru(bpy)2Cl(κ
1-P-PPh2OCH3)](PF6) (2), while treatment of [RuCl2(PPh3)3] with [2-(C5H4N)CH=N(CH2)2N(CH3)2] (L1) in tetrahydrofuran at room temperature afforded a ruthenium(II) complex [Ru(PPh3)Cl2(κ
3-N,N,N-L1)] (3). Interaction of the chloro-bridged complex [Ru(CO)2Cl2]
n
with one equivalent of [Ph2P(o-C6H4)CH=N(CH2)2N(CH3)2] (L2) led to the isolation of [Ru(CO)Cl2(κ
3-P,N,N-L2)] (4). The molecular structures of the ruthenium(II) complexes 1–4 have been determined by single-crystal X-ray crystallography. The properties of the ruthenium(II) complex 4 as a hydrogenation catalyst for acetophenone were also tested.