bluuebunny/crossref_metadata_2025_split huggingface dataset:
Recent progress in terahertz metamaterial modulators
Authors: Degl’Innocenti Riccardo , Lin Hungyen , Navarro-Cía Miguel 
Published: April 2022

Abstract
The terahertz (0.1–10 THz) range represents a fast-evolving research and industrial field. The great interest for this portion of the electromagnetic spectrum, which lies between the photonics and the electronics ranges, stems from the unique and disruptive sectors where this radiation finds applications in, such as spectroscopy, quantum electronics, sensing and wireless communications beyond 5G. Engineering the propagation of terahertz light has always proved to be an intrinsically difficult task and for a long time it has been the bottleneck hindering the full exploitation of the terahertz spectrum. Amongst the different approaches that have been proposed so far for terahertz signal manipulation, the implementation of metamaterials has proved to be the most successful one, owing to the relative ease of realisation, high efficiency and spectral versatility. In this review, we present the latest developments in terahertz modulators based on metamaterials, while highlighting a few selected key applications in sensing, wireless communications and quantum electronics, which have particularly benefitted from these developments.
Unraveling the temperature dynamics and hot electron generation in tunable gap-plasmon metasurface absorbers
Authors: Khosravi Khorashad Larousse , Argyropoulos Christos 
Published: April 2022

Abstract
Localized plasmons formed in ultrathin metallic nanogaps can lead to robust absorption of incident light. Plasmonic metasurfaces based on this effect can efficiently generate energetic charge carriers, also known as hot electrons, owing to their ability to squeeze and enhance electromagnetic fields in confined subwavelength spaces. However, it is very challenging to accurately identify and quantify the dynamics of hot carriers, mainly due to their ultrafast time decay. Their nonequilibrium temperature response is one of the key factors missing to understand the short time decay and overall transient tunable absorption performance of gap-plasmon metasurfaces. Here, we systematically study the temperature dynamics of hot electrons and their transition into thermal carriers at various timescales from femto to nanoseconds by using the two-temperature model. Additionally, the hot electron temperature and generation rate threshold values are investigated by using a hydrodynamic nonlocal model approach that is more accurate when ultrathin gaps are considered. The derived temperature dependent material properties are used to study the ultrafast transient nonlinear modification in the absorption spectrum before plasmon-induced lattice heating is established leading to efficient tunable nanophotonic absorber designs. We also examine the damage threshold of these plasmonic absorbers under various pulsed laser illuminations, an important quantity to derive the ultimate input intensity limits that can be used in various emerging nonlinear optics and other tunable nanophotonic applications. The presented results elucidate the role of hot electrons in the response of gap-plasmon metasurface absorbers which can be used to design more efficient photocatalysis, photovoltaics, and photodetection devices.
Flexible MXene/copper/cellulose nanofiber heat spreader films with enhanced thermal conductivity
Authors: Qin Yue , Li Linhong , Li Maohua , Wei Xianzhe , Xiong Shaoyang , Xia Juncheng , Kong Xiangdong , Wang Yandong , Cai Tao , Deng Lifen , Lin Cheng-Te , Nishimura Kazuhito , Yi Jian , Jiang Nan , Yu Jinhong 
Published: April 2022

Abstract
To deal with the heat dissipation problem produced by a high integrated circuit, the preparation of heat spreaders with excellent heat transportation performance is increasing in demand. The Ti3C2 MXene sheets and copper particles were fully contacted with cellulose nanofibers by a high-speed mixer, and the composite film was prepared as a heat spreader under the action of the vacuum-assisted filtration. The MXene sheets are connected by the esterification of the carboxyl group in MXene and the hydroxyl group in cellulose nanofibers to form a chemical bond and consist of the main skeleton of the composite film. Due to the synergistic effects of MXene and copper particles, the in-plane and out-of-plane thermal conductivities of the composite film reach 24.96 and 2.46 W m−1 K−1, respectively. Compared with the pure cellulose nanofiber films, the thermal conductivity of composite films increased by 2819.2 and 187.6%, respectively. By designing two applications of composite films in the actual use process, the excellent heating conduction abilities in two directions have been proved. This measure to improve the thermal conductivities of composite films by MXene-copper binary fillers also provides ideas for the novel heat spreader.
The Impact of Digital Transformation on the Satisfaction of Tax Administration Users in Morocco during the Covid-19 Pandemic: An Empirical Study
Authors: Ait Lhassan Imad , Bedraoui Oumayma , Akhannich Otmane 
Published: April 2022

Purpose: The objective of any change in public administrations is to improve their management system to provide a better service to the citizen user. This is how policy makers defend their political agendas. However, the effectiveness of the digital transformation of public services is not limited to the promulgation of laws but to their impact on the satisfaction of users of public administration and its perception by the public agent and the citizen. The objective of this article is to analyze the impact of digital transformation on the satisfaction of users of public administration, and more particularly of tax administration.
Design / Method / Approach: This is an empirical study with a quantitative approach using a questionnaire administered to 107 taxpayers. We analyzed data through the structural equation method with SmartPls software to study the relationship between five sub-variables of digital transformation and user satisfaction.
Originality / Value: The results show a significantly positive relationship between three sub-variables of digital transformation and user satisfaction: perceived ease of use, perceived usefulness, and website design.
Research Limitations / Future Research: In addition, public administrations need to stay abreast of current trends in service digitalization. The success of the digitization of the administration is conditioned by the commitment and involvement of all stakeholders. This is with the view to providing quality services in real-time, thus meeting users' expectations.
Paper type: Empirical
LC-MS/MS assay for the therapeutic drug monitoring of perampanel in children with drug-resistant epilepsy
Authors: Dai Hao-ran , Hu Ya-hui , Long Jia-yi , Xia Ying , Guo Hong-li , Xu Jing , Ding Xuan-sheng , Chen Jing , Lu Xiao-peng , Chen Feng 
Published: April 2022

AbstractPerampanel (PER) is the first clinically available selective antagonist of α-amino-3-hydroxy-5-methylisoxazole-4-propionic acid (AMPA) receptor approved globally for the treatment of epilepsy. Studies have recently underlined the significant association between dose-exposure-effect-adverse events of PER in patients with epilepsy, so the therapeutic drug monitoring (TDM) of PER is critical in clinical practices, especially for pediatric patients with drug-resistant epilepsy. Due to several limits in previous published analytical methods, herein, we describe the development and validation of a novel liquid chromatography tandem mass spectrometry (LC-MS/MS) method for monitoring PER in human plasma samples. Protein precipitation method by acetonitrile containing PER-d5 as internal standard was applied for the sample clean-up. Formic acid (FA, 0.2 mM) in both aqueous water and acetonitrile were used as the mobile phases and the analyte was separated by an isocratic elution. Qualification and quantification were performed under positive electrospray ionization (ESI) mode using the m/z 350.3 → 219.1 and 355.3 → 220.0 ions pairs transitions for PER and PER-d5, respectively. Potential co-medicated anti-seizure medications (ASMs) have no interference to the analysis. Calibration curves were linear in the concentration range of 1.00–2,000 ng mL−1 for PER. The intra- and inter-batch precision, accuracy, recovery, dilution integrity, and stability of the method were all within the acceptable criteria and no matrix effect or carryover was found. This method was then successfully implemented on the TDM of PER in Chinese children with drug-resistant epilepsy. We firstly confirmed the apparent inter- and intra-individual PER concentration variabilities and potential drug-drug interactions between PER and several concomitant ASMs occurred in Chinese pediatric patients, which were also in line with previous studies in patients of other race.
Modeling of the reservoirs heating with the aim of oil recovery increasing
Authors: Lubkov Miсhail , Mosiichuk Kateryna 
Published: April 2022

The object of the research is optimal installation of the heat injection wells for reservoirs heating in order to increase oil recovery and, accordingly, support oil production in the hard-reaching heterogeneous reservoirs. One of the most problematic areas in modern oil production is the difficulty of extracting high-viscosity oil from the reservoirs. So far, the most effective method to overcome this problem is the thermal method. However, the possibilities of this method are limited by its high energy consumption and the cost of relevant practice research. Thus, less expensive corresponding methods of mathematical modeling become more important. This investigation uses a combined finite-element-difference method for the non-stationary thermal conductivity problem. Numerical modeling of the temperature distribution around heat injection wells are carried out, taking into account the heterogeneity of the thermal properties of the oil reservoir and the conditions of convective heat exchange at the reservoir’s boundaries. The proposed method, due to its high accuracy and convergence of the solutions, allows to obtain reliable practical results and has a number of advantages in comparison with the same research methods. It is established that the process of heating of oil reservoirs is slow and energy consuming, so to increase profitability, it is obviously necessary to use associated production products, such as associated gas. It is shown that less wet layers heat up better and there is no sense to heat the layer for more than two weeks, because the radius of the effective heating area (with a temperature exceeding 80 °C required for outcome of high-viscosity oil from the rock) in this case is sufficient. It is also found that the operation of heat-injection wells is more profitable with their joint interaction, in that case the effective heating area of the oil reservoir and, accordingly, the number of production wells will be the largest. Another hand, the main factor in the location of heat-injection wells is defined by special characteristics of the oil-bearing section of the reservoir in each case. The configurations of the location of heat-injection wells, which were presented in this paper, cover the most optimal cases of the installations of considered oil-bearing section of the reservoirs and can be used in practice.
Initial Screening Chest Computed Tomography Findings of Patients Who Were Admitted to Fırat University Hospital with Pre-diagnosis of Coronavirus Disease 2019 (COVID-19)
Authors: AĞLAMIŞ Serpil , EROĞLU Yeşim 
Published: April 2022

Objective: To evaluate radiological findings on initial screening of the patients who had chest computed tomography (CT) with the pre-diagnosis of coronavirus disease-2019 (COVID-19).
Material and Methods: Chest CT images of 90 patients with a pre-diagnosis of COVID-19 were retrospectively analyzed. Demographic characteristics, symptoms, and comorbid conditions of the patients were recorded. The chest CT findings on initial screening and follow-up were analyzed.
Results: The chest CT findings on the initial screening of the patients with a pre-diagnosis of COVID-19 included ground-glass opacities (GGOs) (59%), consolidation (34%), crazy-paving pattern (5%), air bronchogram (18%), vascular dilation (6%), bronchiectasis-bronchial wall thickening (7%), air bubble (7%), subpleural line (10%), halo sign (5%), nodule with irregular borders (9%) and reverse halo sign (%4). The predominant findings in the follow-up CT images included newly developing consolidations in the progression stage, GGOs converting to consolidations, bilateral pleural effusion, traction bronchiectasis, and hilar lymphadenopathy. In the regressed cases, it was observed that the consolidation we observed in the first CT imaging turned into GGOs.
Conclusion: Ground-glass opacities were the most common finding in initial screening thorax CT scans of patients with pre-diagnosis of COVID-19. An increase in the ground-glass densities or consolidation areas identified upon initial examination, bilateral pleural effusion, traction bronchiectasis, and hilar lymphadenopathies were observed in the progression stage
Retinal Morphometric Indicators in Primary Hypothyroidosis and Primary Thyrotoxicosis
Authors: Likhvantseva V. G. , Trubilin V. N. , Korosteleva E. V. , Kapkova S. G. , Vygodin V. A. 
Published: April 2022

Purpose: to study the morphometric parameters of the retina in patients with primary hypothyroidism and primary thyrotoxicosis by optical coherence tomography.Materials and methods. The material for this study was the results of examination of 54 patients (108 eyes) with thyroid dysfunctions: 32 people (64 eyes) with primary untreated hypothyroidism and 22 people (44 eyes) with primary untreated thyrotoxicosis. To assess the morphometric parameters of the retina, optical coherence tomography was performed.Results. A significant thickening of the layer of nerve fibers was revealed in almost all sectors of the retina of patients with primary hypothyroidism and primary thyrotoxicosis, with the exception of the upper sector in primary thyrotoxicosis. The morphometric parameters of the optic nerve head in both groups were ambiguous. With thyrotoxicosis, the diameter and topographic area of the excavation were less than normal, while the area of the neuroretinal girdle, the area and excavation of the optic nerve head, the ratio of excavation to the area of the optic nerve head, the horizontal and vertical dimensions were higher. In hypothyroidism, the diameter, area and topographic volume of the excavation, the ratio of the excavation to the area of the optic nerve head, the horizontal and vertical dimensions of the excavation to the optic nerve head were below normal, and the length and area of the neuroretinal girdle were higher. In both groups, an increase in the volume and thickness of the retina of all macula’s sectors in combination with a decrease in the minimum thickness of the fovea was revealed. A correlation between the parameters of optical coherence tomography and the rank indicators of the ratio of thyroid hormones was revealed.Conclusion. In primary hypothyroidism and primary thyrotoxicosis, statistically significant morphometric changes in the retina and optic nerve head were revealed. The morphometric data correlated with the rank indices of the thyroid hormone ratios.
Optical Coherence Tomography with Angiography in the Diagnosis of Changes in the Organ of Vision at Atherosclerosis
Authors: Kasimova M. S. , Mahkamova D. K. 
Published: April 2022

Background. The study of the parameters of optical coherence tomography with angiography (OCTA) broadens the understanding of the state of hemodynamics for the early detection of vascular disorders of the organ of vision in atherosclerosis (AS).Purpose. To study the parameters of OCTA with changes in the organ of vision against the background of AS.Patients and methods. 26 patients (41 eyes) with changes in the organ of vision in AS. The age contingent of patients ranged from 32 to 78 years, the average age was 47.5 ± 2.0 year, of which 10 were women, 16 men. Depending on the damage to target organs, all patients were conditionally divided into 2 groups: group I (19 eyes) included patients without damage, and group II (22 eyes) consisted of patients with target organs damage.Results. The registration of OCTA in patients of group I, a decrease in the density of capillaries of the superficial vascular network was 15 % and amounted to 45.21 ± 2.62 % (p < 0.05), of the deep vascular plexus by 19 %, which amounted to 45.89 ± 2, 71 % (p < 0.05). In the macular region, the area of the hypoperfused retina was 1.07 ± 0.14 mm2 (p < 0.05). In the region of the optic nerve disc, areas of hypoperfusion were noted in the superficial layers in 7 eyes and in the deep layers in 4 eyes. Analysis of OCTA in patients of group II revealed a sharp decrease (by 48 %) in the density of capillaries in both the superficial and deep vascular plexuses of the retina, which amounted to 33.91 ± 3.01 % (p < 0.05); 33.65 ± 2.89 % (p < 0.05), respectively. In the macular region, the area of the non-perfused retina was 2.19 ± 0.21 mm2 (p < 0.05). In the area of the optic nerve disc, areas of nonperfusion were noted both in the surface layers and in the deep layers in 4 eyes.Conclusion. The use of OCTA allows to detect changes in hemoperfusion in all layers of the retina and optic nerve in the early stages of AS development, which will allow early diagnosis and monitoring of the disease.
Study of seroprevalence of hepatitis a and e viruses in patients of acute viral hepatitis in a tertiary care centre in sub himalayan region
Authors: Sharma Pallavi , Sharma Garima , Sharma Amit , Verma Santwana , Panda Prashant , Sharma Gaurav 
Published: April 2022

Acute viral hepatitis is a systemic infection affecting the liver predominantly. It is common health problem in areas where safe drinking water is not universally available. In recent times we have witnessed frequent outbreaks as a result of that.: To estimate sero-positivity of Hepatitis A and E viruses in indoor patients of hepatitis, presenting with jaundice using ELISA.: Blood samples and clinical information were collected from cases of jaundice and referred to VRDL lab for analysis over a period of 1 year.: Samples were tested for anti –HAV immunoglobulin M (IgM) and anti –HEV immunoglobulin M (IgM).Data was entered into a pre-structured data entry form, on Microsoft Excel sheet.The viral etiology was confirmed in 236 (41.1%) cases while in 337 (58.8%) cases no hepatitis virus could be detected, hepatitis E virus were found to be maximum in 45.76% cases, followed by HAV (39.83% cases)and while in 14.41% cases no hepatitis virus could be detected.: Routine basic microbiological analysis of drinking water should be carried out by assaying the presence of Escherichia coli by the multiple tube fermentation technique.
Nutritional assessment and body composition analysis of women faculty in Madurai
Authors: Krishna K. U. Pavitra , Dhas E. Siva 
Published: April 2022

Working woman has extra workload along with her regular household work. Women who have a good health are capable to handle this workload. Women Professors usually do not perform their meals and physical activities with little regularity which predispose them for overweight. In this sense, it is necessary to carry out studies that evaluate the health conditions of women professors, especially regarding anthropometric indices which can be affected due to the exhaustive work routine. To be healthy and fit proper diet and healthy food is required. With this context, study of the nutritional status and body composition analysis of 50 women faculty in Arul Anandar College is carried out. In this regard body composition analysis such as Height, weight, BMI, Waist Circumference, Hip circumference, WHR, subcutaneous fat % and skeletal % in whole body, trunk, arm and leg, Body fat %, visceral fat %, resting metabolism, body age were assessed using omron karada scan body composition monitor and biochemical parameters such as blood haemoglobin also estimated. The mean and standard deviation was employed to analyze the data. BMI of the women faculty shows that they are overweight. Waist hip ratio is close to the ideal values, excess and high body fat risk and healthy visceral fat levels. The mean blood haemoglobin levels were near the standard values in all the age groups. On the whole 70 per cent of the women faculty were normal, 22 per cent were mildly anaemic, remaining 4 per cent were moderately anaemic.
O homem e seus múltiplos
Authors: Figueiredo Virginia De Araujo 
Published: April 2022

O presente artigo é uma homenagem ao filósofo e professor brasileiro Benedito Nunes. Como foi escrito num período histórico de profunda crise sanitária (pandemia da Covid-19), política (ascensão ao poder do neofascismo no Brasil), social (preponderância do sentimento de ódio entre as classes, as pessoas e até dentro das famílias), econômica (aumento da miséria, reingresso do país no Mapa da Fome), numa palavra: crise humanitária, reuni algumas tentativas de definição de homem, ser humano ou essência humana. Não me restringi às definições estritamente filosóficas, recorri também e, propositalmente, àquelas outras, designadas “poéticas” ou “literárias”. Tentei discorrer e meditar um pouco sobre essas várias definições, inclusive, sobre a noção heideggeriana de Dasein.
Response of Yield and Quality of Soybean (cv. BARI Soybean-6) to Phosphorus and Sulphur Fertilization under Old Brahmaputra Floodplain Soil of Bangladesh
Authors: Barman Dwipok Kumar , Sarkar Shubroto Kumar , Salam Md. Abdus , Paul Swapan Kumar 
Published: April 2022

Background: Soybean is a potential oil seed crop in Bangladesh due to its heavy consumption throughout the country. The lower yield of soybean in Bangladesh compared to the world context might be due to non-judicious fertilization especially phosphorus (P) and sulphur (S). Hence, the study was undertaken to find out the influence of P and S on yield and quality of soybean. Methods: An experiment was conducted at the Agronomy Field Laboratory, Bangladesh Agricultural University, Bangladesh. The study comprised four levels of phosphorus viz. 0, 20, 40 and 60 kg P ha-1 and four levels of sulphur 0, 15, 30 and 45 kg S ha-1. The experiment was laid out in a factorial randomized completed block design with three replications. Result: The highest number of branches plant-1, pods plant-1, 100-seed weight, seed yield, harvest index, protein and oil content were found in 60 kg P along with 30 kg S ha-1 while the lowest seed yield, protein and oil content were found in control. Therefore, application of 60 kg P with 30 kg S appeared as the promising practice for obtaining higher seed yield and better quality of BARI Soybean-6.