bluuebunny/crossref_metadata_2025 huggingface dataset:
Severe Situation of Human Impact on Climate Change, Impact on Infectious Diseases and Solutions
Authors: Yang Ying , Chen Zhi
Published: January 2023

The activities of the human activities, especially since the industrial revolution caused the greenhouse effect and the severe climate change situation, leading to a variety of suffering such as natural disasters, the collapse of the food system and extinction, also infectious diseases and mental diseases and so on. These grim situation makes most countries reach a consensus of net zero discharge and limiting the temperature rise to 1.5° C. To cope with and adapt to climate change threat in the future, we should carry out cross-regional and multidisciplinary cooperation as much as possible, develop high-tech products for early warning of climate health risks, carry out a number of climate health monitoring projects, strengthen the monitoring and early warning capacity of climate change risks, and work together to maintain and promote a good climate for the earth and human health.
F18-FDG PET/CT in a patient with Antisynthetase Syndrome
Authors: Nazerani-Zemann Tina , Stanzel Susanne , Gstettner Christian , Aigner Reingard Maria , Pernthaler Birgit
Published: January 2023

More prevalent in women than men, Antisynthetase Syndrome is a rare and poorly defined autoimmune disease associated with interstitial lung disease, polymyositis, and dermatomyositis. In addition to various diagnostic tools, imaging modalities are needed in certain situations. A 42-year-old woman with Anti-Jo-1-positive Antisynthetase Syndrome presented with thoracic muscular pain. She underwent whole-body Fluorodeoxyglucose positron emission tomography/computed tomography (F18-FDG PET/CT) to evaluate the total extent of the muscles affected. Depicting symptomatic symmetric myositis of the intercostal muscles, F18-FDG PET/CT additionally revealed unusually extensive fasciitis of the lower extremities.
Neurofibromatosis Type 1 with Giant Thrombotic Aneurysm of the Internal Carotid Artery Presenting with Rapid Progression of Visual Disturbance: A Case Report and Literature Review
Authors: Kobayashi Masato , Otani Naoki , Kajimoto Ryuta , Katsuhara Takamichi , Yoshino Atsuo
Published: January 2023

Background Patients with neurofibromatosis type 1 (NF1) have various vascular diseases due to the vascular fragility, but no reports of case of giant thrombotic aneurysm was found. We treated a rare case of giant thrombotic aneurysm of the internal carotid artery (ICA) in a patient with NF1.

Case Presentation A 60-year-old man had suffered deteriorating visual loss and homonymous hemianopia. Contrast-enhanced computed tomography showed a giant thrombosed aneurysm on the anterior wall of the ICA located in the optic chiasma. We planned and completed the external carotid artery-middle cerebral artery high-flow bypass using radial artery graft. The visual fields test was performed 14 days after surgery. Homonymous hemianopia persisted but no exacerbation of visual field impairment was observed. No complications were found at 14 days after surgery and the postoperative course was uneventful.

Conclusion We consider that external carotid artery-middle cerebral artery bypass surgery using radial artery grafts is a safe and effective treatment method for giant thrombotic aneurysm associated with NF1.
Treatment of Mitochondrial Phenylalanyl-tRNa-Synthetase Deficiency (FARS2) with Oral Phenylalanine
Authors: Oswald Susanne L. , Steinbrücker Katja , Achleitner Melanie T. , Göschl Elisabeth , Bittner Reginald E. , Schmidt Wolfgang M. , Tiefenthaler Elke , Hammerl Emma , Eisl Anna , Mayr Doris , Mayr Johannes A. , Wortmann Saskia B.
Published: January 2023

Objective By loading transfer RNAs with their cognate amino acids, aminoacyl-tRNA synthetases (ARS) are essential for protein translation. Both cytosolic ARS1-deficiencies and mitochondrial ARS2 deficiencies can cause severe diseases. Amino acid supplementation has shown to positively influence the clinical course of four individuals with cytosolic ARS1 deficiencies. We hypothesize that this intervention could also benefit individuals with mitochondrial ARS2 deficiencies.

Methods This study was designed as a N-of-1 trial. Daily oral L-phenylalanine supplementation was used in a 3-year-old girl with FARS2 deficiency. A period without supplementation was implemented to discriminate the effects of treatment from age-related developments and continuing physiotherapy. Treatment effects were measured through a physiotherapeutic testing battery, including movement assessment battery for children, dynamic gait index, gross motor function measure 66, and quality of life questionnaires.

Results The individual showed clear improvement in all areas tested, especially in gross motor skills, movement abilities, and postural stability. In the period without supplementation, she lost newly acquired motor skills but regained these upon restarting supplementation. No adverse effects and good tolerance of treatment were observed.

Interpretation and Conclusion Our positive results encourage further studies both on L-phenylalanine for other individuals with FARS2 deficiency and the exploration of this treatment rationale for other ARS2 deficiencies. Additionally, treatment costs were relatively low at 1.10 €/day.
Treatment of Acquired von Willebrand Disease due to Extracorporeal Membrane Oxygenation in a Pediatric COVID-19 Patient with Vonicog Alfa: A Case Report and Literature Review
Authors: Heubner Lars , Trautmann-Grill Karolin , Tiebel Oliver , Mirus Martin , Güldner Andreas , Rand Axel , Spieth Peter Markus
Published: January 2023

Acquired von Willebrand disease (aVWD) is frequently observed in patients with the need for extracorporeal membrane oxygenation (ECMO). aVWD can be treated by plasma-derived concentrates containing factor VIII (FVIII) and/or von Willebrand factor (VWF) and recombinant VWF concentrate as well as adjuvant therapies such as tranexamic acid and desmopressin. However, all of these therapeutic options possibly cause thromboembolism. Therefore, the optimal treatment remains uncertain. This report presents a case of a 16-year-old patient suffering from severe acute respiratory distress syndrome due to coronavirus disease 2019 with the need of ECMO support. Our patient developed aVWD under ECMO therapy characterized by loss of high-molecular-weight multimers (HMWM) and severe bleeding symptoms following endoscopic papillotomy due to sclerosing cholangitis. At the same time standard laboratory parameters showed hypercoagulability with increased fibrinogen level and platelet count. The patient was successfully treated with recombinant VWF concentrate (rVWF; vonicog alfa; Veyvondi) combined with topic tranexamic acid application and cortisone therapy. rVWF concentrate vonicog alfa is characterized by ultra-large multimers and absence of FVIII. Patient could be successfully weaned from ECMO support after 72 days. Multimer analysis 1 week after ECMO decannulation showed an adequate reappearance of HMWM.
The Future of Laboratory-Developed Tests in Hemostasis Laboratories
Authors: Gardiner Chris , Echenagucia Marión , Gosselin Robert C.
Published: January 2023

Laboratory-developed tests (LDTs) are widely used in clinical hemostasis laboratories. The extent to which LDTs are regulated varies greatly around the world, and proposed changes to regulations have raised concerns about the future of LDTs in clinical laboratories. It is increasingly difficult to justify the use of an LDT where a commercially available method with regulatory approval is available. Conversely, where there is no suitable test with regulatory approval and there is a compelling clinical need, using an LDT outweighs the risk associated with not performing the test. We argue that LDTs are still required in specialist clinical laboratories to fulfill unmet clinical needs, and in lower middle-income countries where they are a vital resource.
Parents' Attitudes toward COVID-19 Vaccination: A Study from Two Centers in Istanbul
Authors: Saka Selve Çınaroğlu , Kafi Hale Molla , Çakın Zeynep Ebru , Fırat Cem Koray , Toprak Ali , Türel Özden
Published: January 2023

Objective Vaccination is an important measure for the prevention of coronavirus disease 2019 (COVID-19). In the present study, we aimed to evaluate parents' attitudes toward vaccinating themselves and their children. We also searched whether information about the multisystem inflammatory syndrome in children (MIS-C), a severe complication of COVID-19, could change parents' decisions on vaccinating their children.

Methods A questionnaire form consisting of sociodemographic features, COVID-19 vaccination practices, and knowledge about MIS-C was applied to parents of children attending Bezmialem Vakıf University Hospital from March through June 2022. Factors affecting vaccine hesitancy were evaluated.

Results Among 383 parents, COVID-19 history was present in 248 (64.8%), and 165 (43.1%) were hesitant to vaccinate themselves. The number of cases where both parents had received at least one dose of COVID-19 vaccine was 256/354 (72.3%). The most common reasons for vaccine hesitancy were vaccines being new in 53/165 (32.1%) and fears of side effects in 95/165 (57.6%). Parents' hesitation toward vaccination of their children with the COVID-19 vaccine was highest for the 0 to 6 age group (78.9%) (73.6% in the 6–12 age group, and 47.3% in the 12–18 age group). In total, 365/383 (95.3%) parents did not have an opinion about MIS-C. After information was given, 62.5% of the 302 participants who opposed vaccinating children under 6 years changed their decision to have their children vaccinated.

Conclusion Although routine childhood vaccinations were performed in 99% of children, more than half of parents were hesitant to vaccinate their children with the COVID-19 vaccine. The majority did not have an opinion about MIS-C. Briefings by pediatricians about complications of COVID-19 will help avoid vaccine hesitancy.
“Smart” outsourcing in support of the humanization of entrepreneurship in the artificial intelligence economy
Authors: Matytsin Denis E. , Dzedik Valentin A. , Markeeva Galina A. , Boldyreva Saglar B.
Published: January 2023

The article focuses on the problem of optimizing human resource management with systematic coverage of economic efficiency and corporate social responsibility. The purpose of the article is to study the role of outsourcing in the humanization of entrepreneurship in the AI economy. The potential of outsourcing in the field of entrepreneurship development in the AI economy is justified through econometric modeling using the regression analysis method on the example of companies from the “Global-500” in 2022. Promising directions for the development of “smart” outsourcing in support of the humanization of entrepreneurship in the economy using the method of comparative analysis are determined through the identification of its advantages in comparison with traditional outsourcing for the humanization of entrepreneurship. Using the case study method, successful examples of the use of “smart” outsourcing in various business operations of entrepreneurship are systematized. The key conclusion is that in the AI economy, the humanization of entrepreneurship can be provided with the help of “smart” outsourcing, which is more preferable than traditional outsourcing due to its increased flexibility, rationality, and efficiency. The theoretical significance lies in clarifying the specifics of outsourcing in the AI economy, as well as in justifying the preference for “smart” outsourcing and in providing a scientific methodology for its implementation. The practical significance is connected with the fact that the proposed practical recommendations on the implementation of “smart” outsourcing allow to improve the efficiency of entrepreneurial activity and strengthen the resilience of businesses to economic crises, supporting economic growth through “smart” outsourcing.
Inverse Faraday effect of weakly relativistic full Poincaré beams in plasma
Authors: Liu Wei , Jia Qing , Zheng Jian
Published: January 2023

The inverse Faraday effect (IFE), which usually refers to the phenomenon in which a quasi-static axial magnetic field is self-generated when a circularly polarized beam propagates in a plasma, has rarely been studied for lasers with unconventional polarization states. In this paper, IFE is reconsidered for weakly relativistic full Poincaré beams, which can contain all possible laser polarization states. Starting from cold electron fluid equations and the conservation of generalized vorticity, a self-consistent theoretical model combining the nonlinear azimuthal current and diamagnetic current is presented. The theoretical results show that when such a laser propagates in a plasma, an azimuthally varying quasi-static axial magnetic field can be generated, which is quite different from the circularly polarized case. These results are qualitatively and quantitatively verified by three-dimensional particle-in-cell simulations. Our work extends the theoretical understanding of the IFE and provides a new degree of freedom in the design of magnetized plasma devices.
Room temperature synthesis of lead-free FASnI3 perovskite nanocrystals with improved stability by SnF2 additive
Authors: Chen Zeying , Dhakal Tara P.
Published: January 2023

Tin halide perovskites are among the candidates for replacing lead-based ones for less toxicity and comparable optical properties. However, stability remains a challenge due to the easier oxidation of Sn2+ than Pb2+. Here, for the first time, we applied the ligand-assisted reprecipitation method to synthesize CH(NH2)2SnI3 (FASnI3) orthorhombic perovskite nanocrystals with an average diameter of 7.7 nm and a photoluminescence emission at 825 ± 2 nm (1.5 eV). The influence of synthesis parameters, including precursor solvent, precipitation media, temperature, and time on optical properties of nanocrystals, was studied. By incorporating SnF2, the stability of the nanocrystals was improved, and the oxidation from FASnI3 to FA2SnI6 was significantly delayed, which was quantitively demonstrated and confirmed by observing the characteristic diffraction peaks of the perovskite phase using x-ray diffraction at various exposure time to air. The addition of SnF2 is optimized to be 6%. The FASnI3 nanocrystals stayed stable for at least 265 days under N2 storage at room temperature and relative humidity of 20%.
Enhanced dielectric properties of Be-doped magnesium oxide nanopowder
Authors: Lee Sang-hwa , Jeon Young Pyo , Lee Eun Jung , Lee Young Jun , Cho Tae Woong , Kim Gyung Hyun , Ko Eunseo , Park Ju Sang , Moon Young Il , Park Sang Yoon , Yoo Young Joon
Published: January 2023

Owing to its applicability in refractory ceramic synthesis, nanoelectronics, optoelectronic and sensing devices, and superconducting products, magnesium oxide (MgO) is recognized to be an important ceramic material. However, it has a relatively low dielectric constant compared to other metal oxide semiconductors, which restricts the range of its bandgap and limits its applicability. Therefore, in this study, we propose and verify a method to improve the dielectric constant of MgO. A sample of MgO powder doped with Be ions was prepared using the Pechini method. The crystal structure of the doped MgO powder was analyzed by x-ray diffraction. Through structural analysis, it was confirmed that a substitution amount of up to 5% of Be ions was possible without breaking the cubic structure. The bonding structure in the lattice of the sample was identified through x-ray photoelectron spectroscopy, and the change in the bonding structure according to the amount of substitution was identified. The dielectric properties of the samples were analyzed as a function of frequency at room temperature. The real and imaginary parts of the dielectric constant were studied at room temperature as a function of frequency and composition. It was confirmed that the dielectric constant increased as the Be ions were substituted. Our results show that improving the low dielectric properties of pure MgO can enable its application to wide bandgap and high voltage applications simultaneously.
Design optimization of a truncated cone-shaped LaBr3:Ce/NaI:Tl phoswich detector based on GEANT4 simulation
Authors: Li R. P. , Wang H. D. , Lu Jingbin , Li Chengqian , Situ Zirui , Qu Huan
Published: January 2023

The anti-Compton phoswich (ACP) detector, which is composed of multiple scintillators with one photomultiplier tube, takes into account the Compton suppression function and portability, and therefore, a discussion on how to design its shape to improve the performance of the detector has become necessary. Based on an ACP detector using a well-typed LaBr3:Ce/NaI:Tl composite scintillator that has been developed in the laboratory in early work, this study uses GEANT4 to simulate and study the influence of the change in the shape and size of the secondary scintillator on the performance of the detector, such as the Compton suppression ratio, the energy resolution, and the full-energy peak (FEP) loss. In the course of the study, we mainly investigate the variation of the performance of the detector in two ways. First, the inclination angle of the truncated cone is gradually changed to compare its FEP address and Compton suppression ratio. Second, the case of the well-shaped and annular-shaped secondary scintillators is compared, respectively, to find out their impact on energy resolution and FEP address. The final results show that, compared with the ACP detector using a φ75 × 90 mm2 LaBr3:Ce/NaI:Tl cylindrical composite scintillator, a truncated cone-shaped composite scintillator of 0.8 inclination may have an equivalent 137% light yield (137% signal-to-noise ratio), a Compton suppression ratio of 89.62% (at 662 keV), 89.98% FWHM energy resolution, and a volume reduction of 36.74%, which means that the weight of the detector is reduced by 2.107 kg.
Cooperative VLC system using OOK modulation with imperfect CSI
Authors: Dwivedy Prashant , Dixit Vipul , Kumar Atul
Published: January 2023

Visible light communication (VLC) is one of the aspirant tools for high data rate communication. VLC system employed in a large room requires cooperative transmission for reliable end-to-end communication. Cooperative communication (CC) utilizes several relay approaches to forward the message from transmitter to envisioned destination, and thus, attains high spatial diversity gain, reduced power consumption, improved transmission reliability, increased coverage area, and potentially enhanced system capacity. This paper investigates the error performance of on-off keying (OOK) modulated VLC system in a cooperative environment, where the relay adopts decode-and-forward (DF) protocol. In particular, two cases of cooperative VLC system are considered; (1) Case I, in which the destination node is in direct link with the previous node while in blockage or outside the field of view (FoV) for all the other nodes, (2) Case II, in which the destination node is in direct link with all upstream nodes. For the practical suitability of the system, the imperfect channel state information (CSI) is considered for performance analysis. The mathematical expressions for bit-error-rate (BER) of the considered systems are derived in the presence of perfect and imperfect CSI. The error performance of the considered systems is investigated for the various system parameters such as signal-to-noise ratio (SNR), channel estimation error and receiver locations. The result shows that for the case of blockage, i.e., Case I, the end-to-end communication for two-hop network can be established with the BER of 2 × 10−4 at 128 dB SNR and channel estimation error of 10−12. Further, in the case of non-blockage, i.e., Case II, the result shows that for two-hop communication, the BER in cooperative transmission improved to 5 × 10−5 in compare to 5 × 10−2 in direct communication, at 128 dB SNR and 10−12 channel estimation error. The extensive simulations are carried out to verify the analytical findings.
Synthesis and characterization of a novel hydrogel based on carboxymethyl chitosan/sodium alginate with the ability to release simvastatin for chronic wound healing
Authors: Karami Fatemeh , Saber-Samandari Saeed
Published: January 2023

Since wound dressing has been considered a promising strategy to improve wound healing, recent attention has been focused on the development of modern wound dressings based on synthetic and bioactive polymers. In this study, we prepared a multifunctional wound dressing based on carboxymethyl chitosan (CMC)/sodium alginate (Alg) hydrogel containing a nanostructured lipid carrier (NLC) in which simvastatin (SIM) has been encapsulated. This dressing aimed to act as a barrier against pathogens, eliminate excess exudates, and accelerate wound healing. Among various fabricated composites of dressing, the hydrogel composite with a CMC/sodium Alg ratio of 1:2 had an average pore size of about 98.44 ± 26.9 μm and showed 707 ± 31.9% swelling and a 2116 ± 79.2 g m−2 per day water vapor transfer rate (WVTR), demonstrating appropriate properties for absorbing exudates and maintaining wound moisture. The NLC with optimum composition and properties had a spherical shape and uniform particle size distribution (74.46 ± 7.9 nm). The prepared nanocomposite hydrogel displayed excellent antibacterial activity against Escherichia coli and Staphylococcus aureus as well as high biocompatibility on L929 mouse fibroblast cells. It can release the loaded SIM drug slowly and over a prolonged period of time. The highest drug release occurred (80%) within 14 d. The results showed that this novel nanocomposite could be a promising candidate as a wound dressing for treating various chronic wounds in skin tissues.
Unextendible product bases from tile structures in bipartite systems
Authors: You Siwen , Wang Chen , Shi Fei , Hu Sihuang , Zhang Yiwei
Published: January 2023

Unextendible product basis (UPB) is one of the most fundamental concepts in the field of quantum information theory, and its constructions attract much attention. Recently, Shi et al (2020 Phy. Rev. A
101 062329) constructed UPBs via a tile structure approach. They showed that a tile structure in an m × n grid with certain properties leads to explicit constructions of UPBs in

C

m

⊗

C

n

. The size of the UPB is

m
n
−
s
+
1

if the tile structure contains exactly s tiles. In this paper, we deeply analyze the extent of the tile structure approach, by showing that a desired tile structure in an m × m grid contains at most

⌊

m
2

4

⌋
+
m

tiles, and thus the smallest size of a UPB in

C

m

⊗

C

m

constructed by this approach is

m
2

−
⌊

m
2

4

⌋
−
m
+
1

. Such tile structures and UPBs are referred to as extremal tile structures and extremal UPBs. We provide algorithms both for constructing possible candidates of extremal tile structures and checking their validity. For applications, we connect the extremal UPBs to local irreducibility and bound entangled states with large ranks.
Weyl conjecture and thermal radiation of finite systems
Authors: Baldiotti M C , Jaraba M A , Santos L F , Molina C
Published: January 2023

In this work, corrections for the Weyl law and Weyl conjecture in d dimensions are obtained and effects related to the polarization and area term are analyzed. The derived formalism is applied on the quasithermodynamics of the electromagnetic field in a finite d-dimensional box within a semi-classical treatment. In this context, corrections to the Stefan–Boltzmann law are obtained. Special attention is given to the two-dimensional scenario, since it can be used in the characterization of experimental setups. Another application concerns acoustic perturbations in a quasithermodynamic generalization of Debye model for a finite solid in d dimensions. Extensions and corrections for known results and usual formulas, such as the Debye frequency and Dulong–Petit law, are calculated.
Study on the failure analysis of four metals for anaerobic fermentation reactor based on numerical simulation and electrochemical method
Authors: Wang Kun , Fu Chun , Chen Xu
Published: January 2023

The core problem of low energy consumption anaerobic fermentation reactor is that the reactor can make reasonable and effective use of energy from two aspects of quantity and quality, so as to ensure the anaerobic fermentation performance of the reactor and make it run efficiently and energy-saving. However, serious corrosion of metal for reactors was found during operation, and the selection of reactor materials became the key to restrict biogas production. In this paper, the corrosion characteristics of the four metals including Q235A steel, Q345A steel, 45# steel and 3Cr13 steel were determined by corrosion morphology, mechanical and electrochemical experiments. The results showed that the corrosion product particles of Q235A steel were polygonal, showing a good cross-linking feature, which was better than that of Q345A and 45# steels. However, there was no obvious boundary between corrosion product particles of 3Cr13 steel. The presence of Fe3C in the corrosion products of 3Cr13 steel and the observation of micro-cracks on the surface at nanometer scale indicated that the intergranular corrosion of 3Cr13 steel was dominated. For another aspect, with the increase of CO2 and CH4 content, the corrosion rate of the four metals was generally accelerated, in which the Q235A steel showed the best performance under different conditions. In addition, Q345A and 45# steels showed relatively good corrosion resistance, under which the total mole of mixed gas (CO2/H2O/CH4) was lowest.
Investigation on the multiple plies structure of aluminum-lithium alloy and glass fiber composite with respect to deformation failure
Authors: Qutaba Syed , Asmelash Mebrahitom , Azhari Azmir
Published: January 2023

The deformation behavior and mechanical properties based on the aluminum-lithium alloys (FMLs) was investigated to optimize the manufacturing process and further interface interaction. The primary structures of the FML composites were made with two sets of plies. From there, six secondary composites with different fibre sheet orientations were made. Then, interlaminar tensile, flexural, and peeling properties of FMLs were tested. The fiber orientation role in the case of failure behaviors of FMLs under different conditions was also revealed. The results have indicated that the plies design significantly enhanced the interlaminar properties of the FMLs and orientation of fiber laying has significantly affected the flexural strength. The peeling test has shown higher fiber-to-metal interfacial bonding with the value of ≥80 N m−2 over metal-to-metal adhesion. The plies increase the mechanical properties of composite based at fiber orientation and thickness, but too much impairs performance. The 3/2 plies showed a value of ≤385 MPa, which has better results in axial structure analysis than over 4/2 composite layers. The peak values appeared under different parameters like adhesive bonding and parallel fiber orientation, represented in the qualitative analysis section. The surface microscopy of aluminum-lithium alloy sheet and cross-section failure morphology of composite has been done at a different sighting. Surface characterization, fiber orientation breakdown, and deformation morphology have been studied concerning alloys’ elongated grains and micro pits.
Numerical and experimental studies on the effectiveness of time-varying electromagnetic fields in reducing electron density
Authors: GUO Shaoshuai , XIE Kai , XU Han , FU Maixia , NIU Yingying
Published: January 2023

When an aircraft or a hypersonic vehicle re-enters the atmosphere, the plasma sheath generated can severely attenuate electromagnetic wave signals, causing the problem of communication blackout. A new method based on time-varying
E × 
B
fields is proposed to improve on the existing static
E × 
B
fields and mitigate the radio blackout problem. The use of the existing method is limited by the invalid electron density reduction resulting from current density j = 0 A m−2 in plasma beyond the Debye radius. The most remarkable feature is the introduction of a time-varying electric field to increase the current density in the plasma to overcome the Debye shielding effect on static electric field. Meanwhile, a magnetic field with the same frequency and phase as the electric field is applied to ensure that the electromagnetic force is always acting on the plasma in one direction. In order to investigate the effect of time-varying
E × 
B
fields on the plasma electron density distribution, two directions of voltage application are considered in numerical simulation. The simulation results indicate that different voltage application methods generate electromagnetic forces in different directions in the plasma, resulting in repulsion and vortex effects in the plasma. A comparison of the vortex effect and repulsion effect reveals that the vortex effect is better at reducing the electron density. The local plasma electron density can be reduced by more than 80% through the vortex effect, and the dimensions of the area of reduced electron density reach approximately 6 cm × 4 cm, meeting the requirements of electromagnetic wave propagation. Besides, the vortex effect of reducing the electron density in RAM-C (radio attenuation measurements for the study of communication blackout) reentry at an altitude of 40 km is analyzed. On the basis of the simulation results, an experiment based on a rectangular-window discharge device is proposed to demonstrate the effectiveness of the vortex effect. Experimental results show that time-varying
E × 
B
fields can reduce the electron density in plasma of 3 cm thickness by 80% at B = 0.07 T and U
0 = 1000 V. The investigations confirm the effectiveness of the proposed method in terms of reducing the required strength of the magnetic field and overcoming the Debye shielding effect. Additionally, the method is expected to provide a new way to apply a magnetic window in engineering applications.
Sulfonamide and tetracycline resistance genes in nanjing lakes: effect of water quality and heavy metals
Authors: Rajasekar Adharsh , Zhao Cailin , Norgbey Eyram , Murava Raphinos Tackmore
Published: January 2023

Due to high population density, anthropogenic activities and waste disposal have negatively affected artificial lakes in residential areas. These artificial lakes lack the capacity for auto-depuration to remove pollutants and contaminants; thus, they have the potential to act as reservoirs for antibiotic resistance genes (ARGs). In this study, we examined three urban artificial freshwater lakes in Nanjing to determine the abundance of sulfonamide and tetracycline resistance genes. Concerning water quality, the three lakes were found to be highly eutrophic, owing to their high levels of Total Nitrogen (TN), Phosphorous (TP), and Chlorophyll a (Chla). The average abundance of sulfonamide resistance genes detected in the three urban lakes was 42.446 log10 gene copies/100 ml, which was lower than the average abundance of tetracycline resistance genes (68.207 log10 gene copies/100 ml). Analysis by ANOVA revealed that all ARGs, except sul3, showed significant differences, probably due to varied anthropogenic influences in lakes. Pearson correlation and principal component analyses were performed to explore the correlation between ARGs, water quality markers, and heavy metals to understand the co-selection and drivers of ARGs propagation. tetM showed no correlation with any water quality markers, whereas Chla showed a positive correlation with all ARGs except tetM. tetM was the only gene observed to be unaffected by TN, TP, and Chla. The tet genes also showed strong associations with each other except tetM, especially tetA, tetQ, and tetG. The co-selection results between heavy metals and ARGs were insignificant (p > 0.05), with tetM being the most sensitive to the effects of heavy metals and As having the strongest effect on sul3 and tet genes. The results from this study provide basic but archival information on the effect of eutrophication and heavy metals such as Arsenic, showing the potential influence on the dissemination of certain sulfonamide and tetracycline ARGs in freshwater environments.
The impact of onshore wind farms on ecological corridors in Ningbo, China
Authors: Guan Jinjin
Published: January 2023

Under the background of the energy transition, the ecosystems are threatened by the rapid expansion of renewable power plants, especially wind turbines with enormous sizes. While the potential ecological influence near wind farms has not been extensively studied. In the process of wind farm site selection, there is no uniform methodology to assess the ecological impact on the local ecosystem. This paper proposed a research framework to quantify the impacts on ecological corridors under the influence of wind farms. Taking five wind farms in Ningbo Peninsula as cases, the geographical data from Landsat 8, NDVI, DEM, and wind turbine data from Vortex were selected from 2010 to 2020. The ecological sources and resistance surfaces were analyzed with and without wind farms under least-cost distance and least-cost path models. The results revealed that wind farms could increase the migration resistance that prevents the species’ ecological corridors, and change the number and routes of main ecological corridors. Additionally, the cumulative resistance value positively correlated with the distance between ecological sources. Through GIS spatial quantification assessment, this paper helps balance wind energy development and regional ecological security and provides scientific and orderly planning suggestions for the healthy development of the regional ecological network.
Manufacturing of stereolithographic 3D printed boron nitride nanotube-reinforced ceramic composites with improved thermal and mechanical performance
Authors: Tank Mehul , Leon Ana De , Huang Wentao , Patadia Mitesh , Degraff Joshua , Sweat Rebekah
Published: January 2023

Boron nitride nanotubes (BNNTs) are the perfect candidate for nanofillers in high-temperature multifunctional ceramics due to their high thermal stability, oxidation resistance, good mechanical properties, high thermal conductivity, and radiation shielding. In this paper, 3D printed ceramic nanocomposite with 0.1 wt% of BNNT was prepared by fusing it at high temperatures. Samples were built with three different print directions to study the effect of print layers on mechanical performance along with BNNT addition. Dynamic mechanical analysis is performed to study the length effect of nanoscale reinforcements on the mechanical properties of the printed ceramic composites reporting significant improvements up to 55% in bending strength and 72% in bending modulus with just 0.1 wt% BNNT addition. A 63% thermal diffusivity improvement of ceramic by adding BNNTs is observed using laser flash analysis. The bridging and pull-out effect of nanotubes with a longer aspect ratio was observed with high-resolution microscopy. Such composites’ modeling and simulation approaches are crucial for virtual testing and industrial applications. Understanding the effect of nanoscale synthetic fillers for 3D printed high-temperature ceramics can revolutionize future extreme environment structures.
Real-time monitoring system for resistance spot welding quality
Authors: Wen Jing , Jia Hongde
Published: January 2023

In this study, a stable real-time monitoring system was established to monitor electrical and mechanical signals during resistance spot welding process. The sudden decrease of electrode voltage signal, the fluctuation of dynamic electrode force and the obvious decline of dynamic resistance could be used for recognizing expulsion phenomena during resistance spot welding which would reduce welding quality and should be avoided as much as possible. In order to research the welding quality estimation methods, four estimation models were built based on regression analysis and back-propagation neural network. The results showed that the estimation accuracy of back-propagation neural network was higher than the model of regression analysis, and the characteristic values of dynamic signals during resistance spot welding process could improve the estimation accuracy significantly.
Bounded rationality and animal spirits: a fluctuation-response approach to Slutsky matrices
Authors: Garnier-Brun Jérôme , Bouchaud Jean-Philippe , Benzaquen Michael
Published: January 2023

The Slutsky equation, central in consumer choice theory, is derived from the usual hypotheses underlying most standard models in Economics, such as full rationality, homogeneity, and absence of interactions. We present a statistical physics framework that allows us to relax such assumptions. We first derive a general fluctuation-response formula that relates the Slutsky matrix to spontaneous fluctuations of consumption rather than to response to changing prices and budget. We then show that, within our hypotheses, the symmetry of the Slutsky matrix remains valid even when agents are only boundedly rational but non-interacting. We finally propose an ‘animal spirit’ model where agents are influenced by the choice of others, leading to a phase transition beyond which consumption is dominated by herding (or ‘fashion’) effects. In this case, the individual Slutsky matrix is no longer symmetric, even for fully rational agents. The vicinity of the transition features a peak in asymmetry.
3. The rise of modern international order
Authors: Lawson George
Published: January 2023

This chapter examines the rise of modern international order. It begins with a discussion of international orders before the modern period, focusing on how trade and transport helped to link diverse parts of the world. It then considers debates about the 1648 Peace of Westphalia, along with nineteenth-century developments such as industrialization and imperialism. It also explores the main ideas that underpinned modern international order, the ‘shrinking of the planet’ that arose from the advent of new technologies, the emergence of intergovernmental organizations and international non-governmental organizations, and the advent of a radically unequal international order. The chapter concludes with case studies on the dual character of international law and imperialism in China.
5. From the end of the cold war to a new world dis-order?
Authors: Cox Michael
Published: January 2023

This chapter provides a broad overview of the international system between the end of the cold war—when many claimed that liberalism and the West had triumphed—through to the second decade of the twenty-first century, when the West itself and the liberal economic order it had hitherto promoted appeared to be coming under increased pressure from political forces at home and new challenges abroad. But before turning to the present, the chapter looks at some of the key developments since 1989—including the Clinton presidency, the George W. Bush administration's foreign policy following the attacks of 9/11, the 2008 financial crash, the crisis in Europe, the transitions taking place in the global South, the origins of the upheavals now reshaping the Middle East, the political shift from Barack Obama to Donald Trump, the emergence of Asia, and the rise of China. The chapter then concludes by examining two big questions: first, is power now shifting away from the West, and second, to what extent does the current wave of populism in the West threaten globalization and the liberal order?
9. Realism
Authors: Rosenboim Or
Published: January 2023

This chapter examines the claim that realism offers the most powerful explanation for the state of war that is the regular condition of life in the international system. It first provides an overview of the theory of realism before discussing whether there is one realism or a variety of realisms. It argues that despite some important differences, all realist theories share a set of core assumptions and ideas. It goes on to consider these common elements, namely self-help, statism, and survival. The chapter concludes with an analysis of the extent to which realism is relevant for understanding the globalization of world politics. To illustrate the main ideas tackled in this chapter, two case studies are presented. The first looking at Kautilya%#x0027;s realistic thought. Kautilya was a key adviser to Indian king Chandragupta Maurya (c.317–293). The second case study considers the impact of Russia's annexation of the Crimea.
10. Feminism
Authors: Kinsella Helen M.
Published: January 2023

This chapter examines international feminism, focusing on whether feminist international relations theories are necessary for understanding international politics, what basis feminist international relations theories provide for understanding international politics, and how feminist international relations theories have influenced the practice of international politics. The chapter proceeds by explaining feminism and feminist international relations theory as well as feminist conceptions of gender and power. It also discusses four feminist international relations theories: liberal feminist international relations, critical feminist international relations, postcolonial feminist international relations, and poststructural feminist international relations. Two case studies of women's organizations are presented: the Women's International League of Peace and Freedom and the Revolutionary Association of the Women of Afghanistan.
12. Poststructuralism
Authors: Hansen Lene
Published: January 2023

This chapter examines the core assumptions of poststructuralism, one of the international relations (IR) perspectives furthest away from the realist and liberal mainstream. It explores whether language matters for international relations, whether all states have the same identity, and whether the state is the most important actor in world politics today. The chapter also considers poststructuralist views about the social world, state sovereignty, and identity and foreign policy. Finally, it discusses poststructuralism as a political philosophy. Two case studies follow. The first one looking at discourses, images, and the victory of the Taliban regime. The second case studies examines Covid-19, state sovereignty, and vaccines.
17. Gender
Authors: Kirby Paul
Published: January 2023

This chapter examines the power of gender in global politics. It considers the different ways in which gender shapes world politics today, whether men dominate global politics at the expense of women, and whether international—and globalized—gender norms should be radically changed, and if so, how. The chapter also discusses sex and gender in international perspective, along with global gender relations and the gendering of global politics, global security, and the global economy. The first case study in this chapter considers the Kurdish Yekîneyên Parastine Jin (Women's Protection Units) and the role of women in political violence. The second case study examines neo-slavery and care labour in Asia.
20. International organizations in world politics
Authors: Park Susan
Published: January 2023

This chapter examines the role that international organizations play in world politics. It explains what international organizations are, whether we need international organizations in international relations, and what constraints and opportunities exist for international organizations to achieve their mandates. The chapter also considers the reasons why states create international organizations and how we can analyse the behaviour of such organizations. Two case studies are presented: the first looks at Africa's premier financial institution which is the African Development Bank which was created in 1964 to facilitate regional cooperation and financial autonomy and the second considers ‘non-liberal’ IOs with a specific examination of the Shanghai Cooperation Organisation.
28. Global trade and global finance
Authors: Watson Matthew
Published: January 2023

This chapter explores important issues in the conduct of global trade and global finance. In particular, it looks at how the Covid-19 pandemic has changed the experience of global trade and global finance in recent years. It asks why the global economy is so good at allowing some people to own untold riches while many others have too little money to meet basic subsistence needs, and whether the world would be better or worse off without the institutions of global economic governance. After discussing the globalization of trade and finance, the chapter considers the regulation of global trade and global finance. Two case studies are presented, one dealing with the Covid-19 vaccination programme and global economic recovery and another looking at US President Joe Biden's proposed global minimum corporate tax rate.
31. Nationalism, national self-determination, and international relations
Authors: Breuilly John
Published: January 2023

This chapter examines the role of nationalism and national self-determination (NSD) in shaping the major institution of modern international relations: the nation-state. It considers different types of nationalism and how they vary from one another, whether the commonly accepted sequence of nation > nationalism > nation-state is actually the reverse of the normal historical sequence, and whether the principle of NSD is compatible with that of state sovereignty. The chapter also explores the contribution of nationalism to the globalization of world politics and the changing meanings of NSD since 1918. Three case studies of nationalism are presented: Germany, India, and Yugoslavia. There follows one more case study that focuses on nationalisms in South Africa, making a distinction from South African nationalism.
Large enhancement of thermal conductivity of aluminum-reduced graphene oxide composites prepared by a single-step method
Authors: Mitra Arijit , Sahoo Mihir Ranjan , Samal Aiswarya , Pradhan Sunil Kumar , Polai Balaram , Sahoo Krishna Rani , Kar Subrat , Satpathy Bijoy Kumar , Narayanan Tharangattu N , Ajayan Pulickel M , Satyam Parlapalli V , Nayak Saroj K
Published: January 2023

Metal matrix composites have attracted extensive attention from both the research and industrial perspective. In this study, we prepared aluminum-reduced graphene oxide (Al–rGO) composites with enhanced thermal conductivity in an easy single-step process. Pristine Al shows a thermal conductivity of 175 Wm−1K−1 (standard deviation <5%), which increases to 293 Wm−1K−1 for an Al–rGO composite with 1% rGO. Analysis of theoretical models shows that a higher percentage of rGO inside the Al matrix creates a continuous network resulting in more available phase space through which heat carrier phonons travel with less scattering, and hence thermal conductivity of the composite increases. Furthermore, Al–rGO composites show an ∼5% increase in microhardness compared with pristine Al. The electrical resistivity of the composite is comparable to that of pristine Al for a narrow weight percentage of rGO, whereas a 70% enhancement in the thermal conductivity of the composite is observed for the same weight percentage range, suggesting possibilities for exploiting both high electrical and thermal conductivities for various applications.