bluuebunny/crossref_metadata_2025_split huggingface dataset:
Analysis of positive solutions to one-dimensional generalized double phase problems
Authors: Son Byungjae , Sim Inbo 
Published: April 2022

Abstract
We study positive solutions to the one-dimensional generalized double phase problems of the form:

−

(

a

(

t

)

φ

p

(

u
′

)

+
b

(

t

)

φ

q

(

u
′

)

)

′
=
λ
h

(

t

)

f

(

u

)

,

t
∈

(

0
,
1

)

,

u

(

0

)

=
0
=
u

(

1

)

,

\left\{\begin{array}{l}-(a\left(t){\varphi }_{p}\left(u^{\prime} )+b\left(t){\varphi }_{q}\left(u^{\prime} ))^{\prime} =\lambda h\left(t)f\left(u),\hspace{1em}t\in \left(0,1),\\ u\left(0)=0=u\left(1),\end{array}\right.

where

1
<
p
<
q
<
∞

1\lt p\lt q\lt \infty

,

φ

m

(

s

)

≔
∣
s

∣

m
−
2

s

{\varphi }_{m}\left(s):= | s{| }^{m-2}s

,

a
,
b
∈
C

(

[

0
,
1

]

,

[

0
,
∞

)

)

a,b\in C\left(\left[0,1],{[}0,\infty ))

,

h
∈

L

1

(

(

0
,
1

)

,

(

0
,
∞

)

)

∩
C

(

(

0
,
1

)

,

(

0
,
∞

)

)

,

h\in {L}^{1}\left(\left(0,1),\left(0,\infty ))\cap C\left(\left(0,1),\left(0,\infty )),

and

f
∈
C

(

[

0
,
∞

)

,
R

)

f\in C\left({[}0,\infty ),{\mathbb{R}})

is nondecreasing. More precisely, we show various existence results including the existence of at least two or three positive solutions according to the behaviors of

f

(

s

)

f\left(s)

near zero and infinity. Both positone (i.e.,

f

(

0

)

≥
0

f\left(0)\ge 0

) and semipositone (i.e.,

f

(

0

)

<
0

f\left(0)\lt 0

) problems are considered, and the results are obtained through the Krasnoselskii-type fixed point theorem. We also apply these results to show the existence of positive radial solutions for high-dimensional generalized double phase problems on the exterior of a ball.
Social Efficiency of Market Entry Under Tax Policy
Authors: Basak Debasmita , Mukherjee Arijit 
Published: April 2022

Abstract
We provide a new rationale for socially insufficient market entry. We show that if the shadow cost of public funds is sufficiently high, the number of firms under free entry can be socially insufficient if the tax policies are “time inconsistent”, so that the governments cannot commit to the tax policies before market entry of firms. Hence, strategic tax policies may provide a reason why policymakers should engage in pro-competitive policies. Lump-sum subsidies to firms may be a way to achieve that goal.
Relationship between blood clots and COVID-19 vaccines: A literature review
Authors: Atyabi Seyed Mohammad Hassan , Rommasi Foad , Ramezani Mohammad Hossein , Ghane Ezabadi Mohammad Fazel , Arani Mehdi AghaAmooi , Sadeghi Mohammad Hossein , Ahmed Mohammad Mehdi , Rajabi Amir , Dehghan Nima , Sohrabi Ali , Seifi Mojtaba , Nasiri Mohammad Javad 
Published: April 2022

Abstract
SARS-CoV-2 pandemic is one of the most critical pandemics during human civilization. Several therapeutic strategies for COVID-19 management have been offered; nonetheless, none of them seems to be sufficiently beneficial. In effect, vaccines have been proffered as a viable option. The critical issue now is to concentrate on protecting individuals against illness through immunization. One of the causes for concern among the researchers, physicians, and generally the whole community from the onset of vaccination has been the adverse effects (specifically blood clots) that may be observed after the injection of the COVID-19 vaccine. In some countries, such concerns have even resulted in the temporary or permanent discontinuation or abandonment of the application of some vaccines (especially AstraZeneca and Janssen). By evaluating rigorous studies published on this subject, the present article is aimed at identifying the association between blood clot incidence and COVID-19 vaccination. Various methods for producing the COVID-19 vaccines are analyzed, along with their possible pros and cons as well as common and rare side effects, especially VITT and blood clots. Finally, the differences of various vaccines on thrombotic events, WHO recommendations for VITT treatment, and blood clots statics are discussed.
The impact of viscoelastic nanofluids on the oil droplet remobilization in porous media: An experimental approach
Authors: Mobaraki Sina , Tabatabaee Hamid , Torkmani Reza Shiri , Khalilinezhad Seyed Shahram , Ghorashi Saeed 
Published: April 2022

Abstract
Polymer nanohybrids have displayed great potential in remobilizing oil droplets through porous media. This research aims at providing some insights into how the hydrolyzed polyacrylamide (HPAM) polymer and Al2O3 nanoparticles’ (NPs) hybrid can push crude oil toward the producers. An understanding of what the hybrid viscosity is when flowing through porous rocks was acquired by the rheological tests. Using the Du Noüy ring method, the interfacial tension (IFT) between the polymer nanohybrid and crude oil was studied. Contact angle experiments were employed to assess the ability of hybrid in reversing surface wettability. The results show that the hybrid can yield a 12% higher shear viscosity than the HPAM solution and the viscosity improvement dramatically depends on NPs’ concentration and temperature. With more than a 23% drop in the contact angle value, the results of contact angle experiments reveal the capability of the Al2O3 NPs in altering surface wettability. The measured IFT between hybrid and crude oil at different temperatures demonstrates that the adsorption of NPs on the oil–aqueous phase interface can significantly improve the capillary number. This article not only presents the underlying mechanisms of oil recovery during hybrid flooding but also provides a new reference for formulating a novel hybrid agent.
Seven level aligned multilevel inverter with new SPWM technique for PV, wind, battery-based hybrid standalone system
Authors: Motaparthi Nagaraju , Malligunta Kiran Kumar 
Published: April 2022

Abstract
Power generation using renewable energy sources is becoming popular in current scenario due to their capability of reduction in carbon emission as well as reliable power supply to consumers. However, power generation from a single renewable energy source cannot able to provide stable power. Hence, integration of renewable energy sources-based power generations needs to be established for providing continuous power supply to consumers. Solar energy and wind power are two major available sources on earth, hence, photovoltaic (PV) and permanent magnet synchronous generator (PMSG) based wind power generation system is considered in this paper. On the other hand, many loads are AC loads that required conversion from DC to AC such as inverters. Generally, multilevel inverters can able to provide quality supply to loads than normal inverters. However, the number of switches used in the multilevel inverter is more and also increasing size and complexity by increasing the level of the inverter. Therefore, an aligned multilevel inverter is implemented for a PV-Wind-based stand-alone system that has a smaller number of switches. Both solar irradiance and wind speed are depending on weather conditions and are unstable, hence a battery bank is incorporated with the help of a bidirectional DC to DC converter to provide an uninterrupted power supply to loads. A novel controller for 7 levels aligned inverter is implemented in this paper to supply quality power to loads under various scenarios. The proposed Aligned Multilevel Inverter needs half of the switches when compared to existing multilevel inverters as diode-clamped, flying-capacitor, and cascaded H-Bridge topologies. The hardware-in-loop is developed with OPAL-RT to present results under various case studies.
Research on an English translation method based on an improved transformer model
Authors: Li Hongxia , Tuo Xin 
Published: April 2022

Abstract
With the expansion of people’s needs, the translation performance of traditional models is increasingly unable to meet current demands. This article mainly studied the Transformer model. First, the structure and principle of the Transformer model were briefly introduced. Then, the model was improved by a generative adversarial network (GAN) to improve the translation effect of the model. Finally, experiments were carried out on the linguistic data consortium (LDC) dataset. It was found that the average Bilingual Evaluation Understudy (BLEU) value of the improved Transformer model improved by 0.49, and the average perplexity value reduced by 10.06 compared with the Transformer model, but the computation speed was not greatly affected. The translation results of the two example sentences showed that the translation of the improved Transformer model was closer to the results of human translation. The experimental results verify that the improved Transformer model can improve the translation quality and be further promoted and applied in practice to further improve the English translation and meet application needs in real life.
Short-term prediction of parking availability in an open parking lot
Authors: Paidi Vijay 
Published: April 2022

Abstract
The parking of cars is a globally recognized problem, especially at locations where there is a high demand for empty parking spaces. Drivers tend to cruise additional distances while searching for empty parking spaces during peak hours leading to problems, such as pollution, congestion, and driver frustration. Providing short-term predictions of parking availability would facilitate the driver in making informed decisions and planning their arrival to be able to choose parking locations with higher availability. Therefore, the aim of this study is to provide short-term predictions of available parking spaces with a low volume of data. The open parking lot provides parking spaces free of charge and one such parking lot, located beside a shopping center, was selected for this study. Parking availability data for 21 days were collected where 19 days were used for training, while multiple periods of the remaining 2 days were used to test and evaluate the prediction methods. The test dataset consists of data from a weekday and a weekend. Based on the reviewed literature, three prediction methods suitable for short-term prediction were selected, namely, long short-term memory (LSTM), seasonal autoregressive integrated moving average with exogenous variables (SARIMAX), and the Ensemble-based method. The LSTM method is a deep learning-based method, while SARIMAX is a regression-based method, and the Ensemble method is based on decision trees and random forest to provide predictions. The performance of the three prediction methods with a low volume of data and the use of visitor trends data as an exogenous variable was evaluated. Based on the test prediction results, the LSTM and Ensemble-based methods provided better short-term predictions at multiple times on a weekday, while the Ensemble-based method provided better predictions over the weekend. However, the use of visitor trend data did not facilitate improving the predictions of SARIMAX and the Ensemble-based method, while it improved the LSTM prediction for the weekend.
Experimental and numerical study of the bulb's location effect on the behavior of under-reamed pile in expansive soil
Authors: Ziyara Hayder M. , Albusoda Bushra S. 
Published: April 2022

Abstract
In this experimental and numerical analysis, three varieties of under-reamed piles comprising one bulb were used. The location of the bulb changes from pile to pile, as it is found at the bottom, center, and top of the pile, respectively. PLAXES 3D was used to conduct the research. In expansive soil, the under-reamed piles were 350 mm long, with the pile tip in dense sandy soil. The experiment was carried out in both saturated and unsaturated circumstances. The influence of the bulb location on the pile's bearing capacity for vertical and lateral loads, as well as the amount of swelling pressure and upward movement owing to swelling, was investigated. The results showed that in the unsaturated state, the bulb at the top of the pile gives bearing that is higher than the bulb at the bottom of the pile and near to the bulb in the center. In the case of unsaturated soil, the closer the bulb is to the top, the larger the bearing capacity, whereas in the event of swelling, the bearing capacity is highest when the bulb is in the middle of the pile. The same is true of the pile's upward movement, which is greater when the bulb is at the top than when it is at the bottom.
The effect of tranexamic acid on the reduction of intraoperative and postoperative blood loss and thromboembolic risk in patients with hip fracture
Authors: Stojadinovic Ivan B. , Ristic Branko M. , Knezevic Dragan R. , Milenkovic Zoran S. , Prodanovic Nikola S. , Zornic Nenad R. , Milosevic Jelena B. 
Published: April 2022

Abstract
The aim of this study is to determine whether the use of tranexamic acid (TXA) in patients with hip fracture reduces intraoperative and postoperative blood loss, and on the other hand, whether it increases thromboembolic risk. The study was performed on patients with hip fracture for a period of one year. Patients were divided into two groups (1:1): the first group receiving TXA and the second group receiving placebo. The amount of blood aspiration during the surgery was measured as well as drainage in the postoperative period of 24 h. The occurrence of deep vein thrombosis (DVT) was monitored before and after the surgery by ultrasound of the lower extremities. The amount of total blood loss was two times lower in patients who received TXA (291.8 ± 65.5 mL of blood vs 634.7 ± 150.5 mL of blood). Among the patients who developed DVT, one patient was from the group that did not receive TXA, and two patients were from the group that received TXA. The use of TXA in patients with hip fracture significantly reduces intraoperative and postoperative blood loss, without a significant thromboembolic risk.
Efficient enrichment of U(VI) by two-dimensional layered transition metal carbide composite
Authors: Zhou Yun , Hao Huai-Xin , Dong Tian-Hao , Ni Xu-Feng , Hu Yi-Chen , Ma Jia-Ju , Yang Jun-Qiang , Shi Ke-Liang , Duan Guo-Jian , Liu Tong-Huan 
Published: April 2022

Abstract
With the rapid development of nuclear energy, how to safely and efficiently dispose of radioactive waste solution has become an urgent environmental problem of public concern. It is of great significance to construct a new type of high-efficiency adsorbent material to recover uranium from nuclear waste solution. In this work, the Ti3C2Tx material (an emerging two-dimensional inorganic layered material) with a stable layered structure was used as the matrix, and the amidoxime functionalized MXene composite material (PAO/Ti3C2Tx) was synthesized by in-situ polymerization. The amidoxime-functionalized Ti3C2Tx showed excellent capacity to capture U(VI), with a maximum adsorption capacity of 98.04 mg/g at 25 °C, which was significantly better than that of Ti3C2Tx, and the adsorption selectivity for U(VI) was greatly improved. The adsorption was conformed to Langmuir isotherm model and pseudo-second-order kinetic model. In addition, the adsorbed UO22+ could be effectively desorbed by 0.1 M HNO3, and the adsorption performance of PAO/Ti3C2Tx did not decrease significantly after 5 adsorption/desorption cycles. The results of ionic strength experiment, FT-IR, SEM, and XPS jointly indicated that adsorption mechanism of U(VI) on PAO/Ti3C2Tx was the combined effect of the amidoxime group and -O and -OH active groups on the surface of Ti3C2Tx, mainly inner complexation. These advantages make PAO/Ti3C2Tx composite a highly potential U(VI) adsorbent with great application prospects.
Simultaneous MEKC-DAD and smart spectrophotometric assays of thiocolchicoside and etoricoxib in challenging concentration ratio mixtures
Authors: Kamal Miranda F. , Elonsy Sohila M. , Labib Hala F. , Younis Sameh E. 
Published: April 2022

Abstract
Potent muscle relaxant (thiocolchicoside, TCC) and nonsteroidal anti-inflammatory drug (etoricoxib, ETXB) fixed-dose combination is formulated at relatively high 1:15 and 1:7.5 ratios for TCC and ETXB, respectively. Since the minor component (TCC) has lower absorptivity, assay of TCC/ETXB tablets presents an analytical challenge. The current study presents two novel methods: first is a micellar electrokinetic capillary chromatography (MEKC). Background electrolyte is borate buffer (40 mM, pH 9.2) containing 30 mM sodium dodecyl sulfate and methanol (ratio 80:20%, v/v), measured at 210 nm. Second is a direct double A
max spectrophotometric method; minor component, TCC, is measured directly at its distant λ
max (373 nm), at zero absorption of ETXB. Then, a ten-fold dilution step is carried out to eliminate TCC spectral interference and ETXB is determined at its λ
max (282 nm). Both drugs’ concentrations disclose obedient linearities at 2–100 μg·mL−1 in MEKC, versus 3–25 and 40–350 μg·mL−1 for TCC and ETXB, respectively, in spectrophotometry. All ICH validation elements have been fulfilled for the developed methods. MEKC and spectrophotometric assays achieve accuracy, precision, selectivity, and robustness to be recommended for industrial quality control routine analysis of TCC/ETXB pills formulated at cited ratios or even higher.
Molecular recognition of the interaction between ApoE and the TREM2 protein
Authors: Mai Zhenhua , Wei Wenyan , Yu Haibin , Chen Yongze , Wang Yongxiang , Ding Yuanlin 
Published: April 2022

Abstract
Alzheimer’s disease (AD) is the most common type of dementia. The ε4 allele of the apolipoprotein E (ApoE) gene is the strongest known genetic risk factor for late-onset AD. Triggering receptor expressed on myeloid cells 2 (TREM2) is another important risk factor affecting the AD process after ApoE. Emerging evidence has identified TREM2 as a putative receptor for ApoE, raising the possibility that interactions between ApoE and TREM2 modulate the pathogenesis of AD. In this study, we performed molecular docking and molecular dynamics (MD) analyses to characterize the ApoE–TREM2 interaction and further investigated the effect of the major TREM2 disease-associated mutation (R47H) on the affinity of TREM2 for ApoE. The results indicate that the binding energy between ApoE and TREM2 occurs in an isoform-dependent manner with the following potency rank order: ApoE4 > ApoE3 > ApoE2. In addition, the R47H mutant reduced the interaction between ApoE and TREM2 protein, which may be attributed to decreased hydrogen-bonding interactions, hydrophobic interactions, and electrostatic forces between ApoE and TREM2. Our study analyzed the molecular pattern of the interactions between ApoE and TREM2 and how the variants affect these interactions based on in silico modeling, and the results might help to elucidate the interaction mechanism between ApoE and TREM2. Additional experimental studies will be needed to verify and explore the current findings.
Europäische Geldpolitik – Auf dem Weg zur Modernen Monetaristischen Theorie
Authors: Treptow Thomas M. 
Published: April 2022

Abstract
We show that actual Eurosystem’s monetary policy of purchasing government bonds of the countries of the Eurozone corresponds to the concept of Modern Monetary Theory. Here the state creates and skims off the required money supply for its expenditures himself. The economic policy challenges emerging from the expanded monetary basis in the Eurozone as consequence of the government bond purchases are substantial. We stress that European monetary policy should therefore immediately address the task of reducing the monetary basis and at the same time limiting possible adjustment costs for the European economies. This should take place within an institutionalized monetary management framework.
Der Digital Markets Act kann nur der Anfang sein
Authors: Schnitzer Monika 
Published: April 2022

Abstract
The negotiations for the Digital Markets Act have just been concluded. Together with international competition economists, I have spent the last few months writing a series of policy papers on the need to regulate the platform economy and commenting on the DMA draft. My conclusion: the DMA is an important step in the right direction. It has been sharpened in the final trilogue negotiation, in which the European Commission, the European Parliament and the Council of Ministers negotiated the amendments proposed by the European Parliament. The implementation that now lies ahead is a major challenge that will be almost impossible to meet without a significant increase in the Commission’s resources. On some points, particularly in the area of merger control and the use of structural measures, the rules in the DMA as adopted do not yet go far enough. In this respect, the Digital Markets Act can and should only be the beginning on the way to comprehensive and effective protection of competition on platform markets.
Examining the relationship between religious perception and psychological well-being levels of university football players
Authors: Akgül Mehmet H. , Karafil Ahmet Y. 
Published: April 2022

Background and Study Aim. The relationship between sport and religion is one of the most important research topics of sport psychology recently. In the relevant literature, this relationship mostly focused on sports and Christianity. The present study examines the psychological well-being levels of athletes of the Islamic religion. This study aims to examine the relationship between the religious perception of university football players and their psychological well-being levels.
Material and Methods. For this purpose, 288 university students attending different universities in Turkey, completed the Religious Orientation Scale and Psychological Well-Being Scale. Pearson correlation analysis was used to assess the correlation between variables. Path analysis was applied to test the hypotheses developed in the study. The hypotheses created were tested by the path analysis method using Amos software. Moderator regression analysis was performed. Statistical analysis was carried out using Statistical Package for the Social Sciences (SPSS) 23 program (SPSS Inc. Chicago. II. USA). P-value was set at p<0.05.

Results. According to the findings obtained from the study data, positive and significant relationships were determined between the religious perceptions of the university football players and their psychological well-being (p<0,01).
Conclusions. In conclusion, it was concluded that the religious perception of the university football players was a significant predictor of their psychological well-being (p<0.01). It can be stated that in Turkish-Islamic culture, similar results to the relationship between Sports and Christianity have been achieved. Since religion is a universal phenomenon, it can be stated that the institution of religion has a special meaning for football players.