bluuebunny/crossref_metadata_2025 huggingface dataset:
Automatic evaluation-feedback system for automated social skills training
Authors: Saga Takeshi , Tanaka Hiroki , Matsuda Yasuhiro , Morimoto Tsubasa , Uratani Mitsuhiro , Okazaki Kosuke , Fujimoto Yuichiro , Nakamura Satoshi
Published: April 2023

Social skills training (SST), which is a rehabilitation program for improving daily interpersonal communication, has been used for more than 40 years. Although such training’s demand is increasing, its accessibility is limited due to the lack of experienced trainers. To tackle this issue, automated SST systems have been studied for years. An evaluation-feedback pipeline of social skills is a crucial component of an SST system. Unfortunately, research that considers both the evaluation and feedback parts of automation remains insufficient. In this paper, we collected and analyzed the characteristics of a human–human SST dataset that consisted of 19 healthy controls, 15 schizophreniacs, 16 autism spectrum disorder (ASD) participants, and 276 sessions with score labels of six clinical measures. From our analysis of this dataset, we developed an automated SST evaluation-feedback system under the supervision of professional, experienced SST trainers. We identified their preferred or most acceptable feedback methods by running a user-study on the following conditions: with/without recorded video of the role-plays of users and different amounts of positive and corrective feedback. We confirmed a reasonable performance of our social-skill-score estimation models as our system’s evaluation part with a maximum Spearman’s correlation coefficient of 0.68. For the feedback part, our user-study concluded that people understood more about what aspects they need to improve by watching recorded videos of their own performance. In terms of the amount of feedback, participants most preferred a 2-positive/1-corrective format. Since the average amount of feedback preferred by the participants nearly equaled that from experienced trainers in human–human SSTs, our result suggests the practical future possibilities of an automated evaluation-feedback system that complements SSTs done by professional trainers.
The paradoxical need for human intervention in the conservation of natural environments in Venice lagoon
Authors: Stocco Alice , Pranovi Fabio
Published: April 2023

The Venice lagoon—the largest Mediterranean coastal lagoon—is characterized by the presence at its edges of 31 “valli da pesca”, types of artificial ecosystems that mime the ecological processes of a transitional aquatic ecosystem. Constituted by a series of regulated lakes bounded by artificial embankments, the valli da pesca were established centuries ago to maximize provisioning Ecosystem Services (ESs), such as fishing and hunting. As time passed, the valli da pesca underwent an intentional isolation process leading to private management. Nonetheless, the valli da pesca are still exchanging energy and matter with the “open’ lagoon and today represent an essential element within the context of lagoon conservation. This study aimed to analyze the possible effects of artificial management on both ESs supply and landscape arrangements by assessing 9 ESs (climate regulation, water purification, lifecycle support, aquaculture, waterfowl hunting, wild food, tourism, information for cognitive development, and birdwatching), along with eight landscape indicators. Obtained results suggested that the valli da pesca are today ruled under five different management strategies, according to the maximized ES. Management conditions influence the landscape pattern and achieve a series of “side effects” on the other ESs. The comparison between the managed and abandoned valli da pesca highlights the importance of anthropogenic interventions for conserving these ecosystems, as the abandoned valli da pesca show a loss of ecological gradients, landscape heterogeneity, and provisioning ESs. Nevertheless, the persistence of intrinsic geographical and morphological characteristics still prevails regardless of intentional landscape molding. The result is that the provisioning ESs capacity per unit area is higher in the abandoned valli da pesca than in the open lagoon, emphasizing the importance of these confined areas of the lagoon ecosystem. Considering the spatial distribution of multiple ESs, the provisioning ESs flow that does not occur in the abandoned valli da pesca seems to be replaced by the flow of cultural ESs. Thus, the ESs spatial pattern highlights a balancing effect between different ESs categories. The results are discussed considering the trade-offs generated by private land conservation, anthropogenic interventions, and their relevance for the ecosystem-based management of Venice lagoon.
Association between serum creatinine and type 2 diabetes in the Chinese population: a retrospective cohort study
Authors: Li Rugang , He Min , Yang Qilin , Liang Zezhi , li Ying , Huang Ling , Wu Rong , Huang Jieping
Published: April 2023

The relationship between serum creatinine and type 2 diabetes is limited. We aimed to investigate the association of baseline serum creatinine and new-onset type 2 diabetes in Chinese population. This retrospective cohort study was conducted using data from the health screening program in China. The population were divided into four groups based on serum creatinine levels, and the outcome of interest was the occurrence of a diabetic event. Cox proportional risk model was used to assess the independent effect of baseline serum creatinine level on future diabetes risk. Sensitivity and subgroup analysis were used to verify the reliability of the results. After an average follow-up of 3.12 years, among 201,298 individuals aged ≥ 20 years, 3389 patients developed diabetes. Compared with participants in quartile 2–4 (> 51.6umol/L for female, > 71.8umol/L for male,), a significantly higher risk of new-onset Type 2 Diabetes (OR, 1.15; 95%CI: 1.07–1.23) was found in those in quartile 1 (< 51.6umol/L for female, < 71.8umol/L for male). Moreover, Similar results were found in various subgroups stratified by age, BMI, TG, TC, FPG and family history group. Low serum creatinine is independently associated with increased risk of type 2 diabetes in Chinese adults. It was also stable in various subgroups stratified.
Characterization of electrochemical deposition of copper and copper(I) oxide on the carbon nanotubes coated stainless steel substrates
Authors: Marchewka Jakub , Kołodziejczyk Ewa , Bezkosty Patryk , Sitarz Maciej
Published: April 2023

The nanocomposite coatings composed of carbon nanotubes and various forms of copper were prepared in the two-step process. Firstly, carbon nanotubes were coated on stainless steel substrate using electrophoretic deposition at constant current. Then, the process of electrochemical deposition using copper(II) sulphate solutions was performed under high overpotential conditions. The modification of the copper(II) cations concentration in the solution and the deposition time provided the formation of various forms of crystals. The samples and their cross-sections were observed and examined using scanning electron microscope equipped with electron dispersive spectroscopy system. The analysis of chemical composition revealed that in addition to the pure copper crystals, the crystals characterized by the presence of copper and oxygen were formed. Therefore, Raman spectroscopy was applied to determine the unknown stoichiometry of this copper oxide. The point and in-depth analysis identified copper(I) oxide in the form of different size crystals depending on the concentration of the copper(II) sulphate solution. To confirm these findings, grazing incidence X-ray diffraction measurements were also performed. the combination of the applied methods has provided the detailed description of the preparation of the nanocomposite coatings with the proposed mechanism of copper(I) oxide formation.
Distinct features of two lipid droplets types in cell nuclei from patients with liver diseases
Authors: Imai Norihiro , Ohsaki Yuki , Cheng Jinglei , Zhang Jingjing , Mizuno Fumitaka , Tanaka Taku , Yokoyama Shinya , Yamamoto Kenta , Ito Takanori , Ishizu Yoji , Honda Takashi , Ishigami Masatoshi , Wake Hiroaki , Kawashima Hiroki
Published: April 2023

Lipid droplets (LDs) have been observed in the nuclei of hepatocytes; however, their significance in liver disease remains unresolved. Our purpose was to explore the pathophysiological features of intranuclear LDs in liver diseases. We included 80 patients who underwent liver biopsies; the specimens were dissected and fixed for electron microscopy analysis. Depending on the presence of adjacent cytoplasmic invagination of the nuclear membrane, LDs in the nuclei were classified into two types: nucleoplasmic LDs (nLDs) and cytoplasmic LD invagination with nucleoplasmic reticulum (cLDs in NR). nLDs were found in 69% liver samples and cLDs in NR were found in 32%; no correlation was observed between the frequencies of the two LD types. nLDs were frequently found in hepatocytes of patients with nonalcoholic steatohepatitis, whereas cLDs in NR were absent from the livers of such patients. Further, cLDs in NR were often found in hepatocytes of patients with lower plasma cholesterol level. This indicates that nLDs do not directly reflect cytoplasmic lipid accumulation and that formation of cLDs in NR is inversely correlated to the secretion of very low-density lipoproteins. Positive correlations were found between the frequencies of nLDs and endoplasmic reticulum (ER) luminal expansion, suggesting that nLDs are formed in the nucleus upon ER stress. This study unveiled the presence of two distinct nuclear LDs in various liver diseases.
From polyethylene waste bottles to UIO-66 (Zr) for preconcentration of steroid hormones from river water
Authors: Selahle Shirley Kholofelo , Nqombolo Azile , Nomngongo Philiswa Nosizo
Published: April 2023

Metal–organic framework (UiO-66 (Zr) was synthesized using polyethylene terephthalate (PET) and used as an adsorbent for extraction and preconcentration of steroid hormones in river water. Polyethylene waste bottles were used as the source of polyethylene terephthalate (PET) ligands. The UIO-66(Zr), which the PET was made from recycled waste plastics, was used for the first time for the extraction and preconcentration of four different types of steroid hormones in river water samples. Various analytical characterization techniques were employed to characterize the synthesized material. The steroid hormones were detected and quantified using high-performance liquid chromatography coupled with diode array detector (HPLC–DAD). The results were further validated using ultra-high performance liquid chromatography-tandem mass spectrometry (UHPLC-MS/MS). Experimental variables, such as sample pH, the mass of adsorbent and extraction time, were optimized using Box-Behnken design (BBD). The dispersive solid phase extraction method combined with HPLC–DAD, displayed good linearity (0.004–1000 µg/L) low limits of detections (LODs, 1.1–16 ng/L for ultrapure water and 2.6–5.3 ng/L for river water) and limits of quantification (LOQs, 3.7–5.3 ng/L for ultrapure water and 8.7–11.0 ng/L for river water samples) and acceptable extraction recoveries (86–101%). The intraday (n = 10) and interday (n = 5) precisions expressed in terms of relative standard deviations (%RSD) were all less than 5%. The steroid hormones were detected in most of the river water samples (Vaal River and Rietspruit River). The DSPE/HPLC method offered a promising approach for simultaneous extraction, preconcentration and determination of steroid hormones in water.
The proposed EU Directives for AI liability leave worrying gaps likely to impact medical AI
Authors: Duffourc Mindy Nunez , Gerke Sara
Published: April 2023

Two newly proposed Directives impact liability for artificial intelligence in the EU: a Product Liability Directive (PLD) and an AI Liability Directive (AILD). While these proposed Directives provide some uniform liability rules for AI-caused harm, they fail to fully accomplish the EU’s goal of providing clarity and uniformity for liability for injuries caused by AI-driven goods and services. Instead, the Directives leave potential liability gaps for injuries caused by some black-box medical AI systems, which use opaque and complex reasoning to provide medical decisions and/or recommendations. Patients may not be able to successfully sue manufacturers or healthcare providers for some injuries caused by these black-box medical AI systems under either EU Member States’ strict or fault-based liability laws. Since the proposed Directives fail to address these potential liability gaps, manufacturers and healthcare providers may have difficulty predicting liability risks associated with creating and/or using some potentially beneficial black-box medical AI systems.
Single cell quantification of microRNA from small numbers of non-invasively sampled primary human cells
Authors: Ho Vanessa , Baker Jonathan R. , Willison Keith R. , Barnes Peter J. , Donnelly Louise E. , Klug David R.
Published: April 2023

Expression levels of microRNAs (miRNAs) in single cells are low and conventional miRNA detection methods require amplification that can be complex, time-consuming, costly and may bias results. Single cell microfluidic platforms have been developed; however, current approaches are unable to absolutely quantify single miRNA molecules expressed in single cells. Herein, we present an amplification-free sandwich hybridisation assay to detect single miRNA molecules in single cells using a microfluidic platform that optically traps and lyses individual cells. Absolute quantification of miR-21 and miR-34a molecules was achieved at a single cell level in human cell lines and validated using real-time qPCR. The sensitivity of the assay was demonstrated by quantifying single miRNA molecules in nasal epithelial cells and CD3+ T-cells, as well as nasal fluid collected non-invasively from healthy individuals. This platform requires ~50 cells or ~30 µL biofluid and can be extended for other miRNA targets therefore it could monitor miRNA levels in disease progression or clinical studies.
Impact of unintentionally formed CH2O in oxygenated fuel exhausts on DeNOx-SCR at different NO2/NOx ratios under close to real conditions
Authors: Schönberger Alvarez Ariel A. , Özyalcin Can , Padeken Tom , Mauermann Peter , Lehrheuer Bastian , Sterlepper Stefan , Abouserie Ahed , Vennewald Maurice , Simon Ulrich , Palkovits Regina , Pischinger Stefan
Published: April 2023

Formaldehyde emissions of vehicles with combustion engines, burning oxygenated fuels are a major challenge for exhaust gas aftertreatment systems. This study shows the impact of such emissions for NH3-SCR, with a high NO2-ratio.
The sulfonadyns: a class of aryl sulfonamides inhibiting dynamin I GTPase and clathrin mediated endocytosis are anti-seizure in animal models
Authors: Odell Luke R. , Jones Nigel C. , Chau Ngoc , Robertson Mark J. , Ambrus Joseph I. , Deane Fiona M. , Young Kelly A. , Whiting Ainslie , Xue Jing , Prichard Kate , Daniel James A. , Gorgani Nick N. , O'Brien Terence J. , Robinson Phillip J. , McCluskey Adam
Published: April 2023

Modification of the known clathrin mediated endocytosis inhibitor dansylcadaverine to the sulfonadyns, dynamin GTPase inhibitors active in the 6 Hz psychomotor animal model of seizures.
Mechanochemical reactions within graft copolymeric assemblies: ultrasound-induced multimechanophore activation, arm chain scission, and aggregation morphology/size changes
Authors: Wang Lijun , Zhou Qiang , Chen Yanfang , Yang Xiaoke , Zhang Yangyang , Duan Hanyi , Song Haixiang , Wang Yanfei , Zheng Yongjun
Published: April 2023

The behavior of a novel multimechanophore-functionalized graft copolymeric assembly in response to ultrasound stimulation was studied in detail.
Construction of LaF3 QD-modified SnS2 nanorod composites for ultrasensitive detection of H2S
Authors: Tang Mingcong , Wang Zijian , Wang Dongyue , Mao Ruiyuan , Zhang Hao , Xu Wei , Yang Zhe , Zhang Dongzhi
Published: April 2023

In this paper, LaF3 QD modified SnS2 nanorods were used to create an ultrasensitive sensor for detecting the SF6 decomposition product H2S.
Progress of M2Si5N8:Eu series in industrial LED phosphors
Authors: Seto Takatoshi , Wang Yuhua , Wu Jiapeng , Li Zebin
Published: April 2023

Herein, we provide an overview of the history of research on industrial LED phosphors, focusing on Sr2Si5N8:Eu, which was the first reported nitride phosphor but it is not ideal for industrial LED lighting and displays.
UK studies on the wider energy system benefits of tidal stream
Authors: Pudjianto Danny , Frost Ciaran , Coles Daniel , Angeloudis Athanasios , Smart Gavin , Strbac Goran
Published: April 2023

This paper summarises the key findings from UK studies on the economic drivers and benefits of Tidal Stream for improving supply reliability and system resilience and its integration with the overall energy system.
Quercetin alleviates nanoparticle-induced osteolysis via deactivating pyroptosis
Authors: Cheng Yu , Zhao Zhijian , Zhang Sheng , Wu Yanglin , Han Zhou , Li Lijun , Teng Yun , Lin Jun , Liu Naicheng , He Shuangjian , Yang Huilin
Published: April 2023

Quercetin regulates the balance of osteoclastogenic differentiation mediated by NLRP3 inflammasome activation, delaying the progression of wear particles-induced osteolysis.
Regulating supramolecular interactions in dimeric macrocycles
Authors: Fang Pengwei , Chen Muqing , Yin Nan , Zhuang Guilin , Chen Tianyun , Zhang Xinyu , Du Pingwu
Published: April 2023

Two dimeric macrocycles with different shapes and configurations are synthesized and show tunable supramolecular interactions with fullerenes.
A sticky, thermal tolerant, tough BP@PVP ionogel for epidermal sensors
Authors: Xiao Xiangfei , Zhao Haidong , Yan Penji , Zhang Hengfei , Liu Xinghuan , Jia Xin , Jin Shuping
Published: April 2023

The BP@PVP Ionogel sensor with sensitive performance, robust interfacial adhesion and thermal tolerance should be provided a potential application in health-care monitoring or human-computer user interfaces.
Outstanding anti-corrosion performance in Nd–Fe–B permanent magnets by constructing a hydrophobic triplex surface coating
Authors: Chen Wang , Jin Jiaying , Yu Junyao , Zhou Liang , Peng Baixing , Fu Song , Liu Xiaolian , Bai Guohua , Yan Mi
Published: April 2023

A facile oxidation strategy is proposed to in situ grow a hydrophobic, thin and uniform triplex surface coating on Nd–Fe–B, which ensures outstanding anti-corrosion performance, accompanied with synergistic magnetic and mechanical performance.
Finding AGN remnant candidates based on radio morphology with machine learning
Authors: Mostert Rafaël I. J. , Morganti Raffaella , Brienza Marisa , Duncan Kenneth J. , Oei Martijn S. S. L. , Röttgering Huub J. A. , Alegre Lara , Hardcastle Martin J. , Jurlin Nika
Published: April 2023

Context. Remnant radio galaxies represent the dying phase of radio-loud active galactic nuclei (AGN). Large samples of remnant radio galaxies are important for quantifying the radio-galaxy life cycle. The remnants of radio-loud AGN can be identified in radio sky surveys based on their spectral index, and identifications can be confirmed through visual inspection based on their radio morphology. However, this latter confirmation process is extremely time-consuming when applied to the new large and sensitive radio surveys.

Aims. Here, we aim to reduce the amount of visual inspection required to find AGN remnants based on their morphology using supervised machine learning trained on an existing sample of remnant candidates.

Methods. For a dataset of 4107 radio sources with angular sizes of larger than 60 arcsec from the LOw Frequency ARray (LOFAR) Two-Metre Sky Survey second data release (LoTSS-DR2), we started with 151 radio sources that were visually classified as ‘AGN remnant candidate’. We derived a wide range of morphological features for all radio sources from their corresponding Stokes-I images: from simple source-catalogue-derived properties to clustered Haralick-features and self-organising-map(SOM)-derived morphological features. We trained a random forest classifier to separate the AGN remnant candidates from the yet-to-be inspected sources.

Results. The SOM-derived features and the total-to-peak flux ratio of a source are shown to have the greatest influence on the classifier. For each source, our classifier outputs a positive prediction, if it believes the source to be a likely AGN remnant candidate, or a negative prediction. The positive predictions of our model include all initially inspected AGN remnant candidates, plus a number of yet-to-be inspected sources. We estimate that 31 ± 5% of sources with positive predictions from our classifier will be labelled AGN remnant candidates upon visual inspection, while we estimate the upper bound of the 95% confidence interval for AGN remnant candidates in the negative predictions to be 8%. Visual inspection of just the positive predictions reduces the number of radio sources requiring visual inspection by 73%.

Conclusions. This work shows the usefulness of SOM-derived morphological features and source-catalogue-derived properties in capturing the morphology of AGN remnant candidates. The dataset and method outlined in this work bring us closer to the automatic identification of AGN remnant candidates based on radio morphology alone and the method can be used in similar projects that require automatic morphology-based classification in conjunction with small labelled sample sizes.
Joint short-time speaker recognition and tracking using sparsity-based source detection
Authors: Guo Yao , Zhu Hongyan
Published: April 2023

A random finite set-based sequential Monte–Carlo tracking method is proposed to track multiple acoustic sources in indoor scenarios. The proposed method can improve tracking performance by introducing recognized speaker identities from the received signals. At the front-end, the degenerate unmixing estimation technique (DUET) is employed to separate the mixed signals, and the time delay of arrival (TDOA) is measured. In addition, a criterion to select the reliable microphone pair is designed to quickly obtain accurate speaker identities from the mixed signals, and the Gaussian mixture model universal background model (GMM-UBM) is employed to train the speaker model. In the tracking step, the update of the weight for each particle is derived after introducing the recognized speaker identities, which results in better association between the measurements and sources. Simulation results demonstrate that the proposed method can improve the accuracy of the filter states and discriminate the sources close to each other.
Can Azolla filiculoides be a complementary feed resource for ecological intensification in small-scale fish farming? Biological effects on giant gourami (Osphronemus goramy)
Authors: Caruso Domenico , Lusiastuti Angela Mariana , Pouil Simon , Samsudin Reza , Arifin Otong Zenal , Slembrouck Jacques
Published: April 2023

Using Azolla filiculoides, a candidate macrophyte species for ecological intensification, in small-scale aquaculture requires the investigation of the potential effects of fresh plant material not only on fish growth but also on physiological status and responses to disease and stress. In this study, juveniles of giant gourami Osphronemus goramy reared into cages placed in an outdoor pond were fed for six weeks with different proportions of fresh Azolla in replacement of commercial pellets (A: 100%, B: 56%, C:26% and D: 0% of the feeding events). The condition factor (KFulton) somatic and immunological indicators were measured. Effects of Azolla on transport stress and bacterial infection with Aeromonas hydrophila were also assessed. Results showed that KFulton decreased with increasing proportions of Azolla in the diet (p < 0.001). Total protein, albumin and globulin in fish from treatment A were significantly lower than in the other treatments. A decrease in lymphocytes was observed in treatments A and B (p < 0.001) and fish from these treatments had higher levels of monocytes (p < 0.001). Neutrophils were higher in treatment A only (p = 0.012). Plasma lysozyme levels and serum bactericidal activity increased with Azolla in the diet (both p < 0.001). Before transport stress, glycaemia was lower in fish from treatment A (p < 0.001) while after transport, glycaemia increased in all treatments excepted treatment A (p < 0.001) where survival was the highest after 15 days post transport. One week after infection the survival of fish was higher in fish from treatments A and B (p < 0.001). Azolla had positive effects on immunological indicators, and resistance to stress and disease but decreased growth. These findings suggest using Azolla at reasonable rate (i.e. <30% of the diet) to reduce pellets inputs while maintaining growth and providing other benefits to fish.
Once again on loading and capacity selection of autotransformers in transmission grids
Authors: Vasilenko Nikita , Misrikhanov Misrikhan , Shuntov Andrey
Published: April 2023

The aspects which have a bearing upon selection of capacity of autotransformers, such as load graphs, permissible temperature characteristics, n-1, n-2 modes, are considered. On the basis of statistical analysis suggestions for improving the current method of capacity selection of autotransformers in transmission grids are given.
Improvement of Algorithms of the Topological Model of the Steady Mode of Electric Power Systems
Authors: Akhmetbaev Dauren , Dzhandigulov Abdygali , Akhmetbaev Arman , Bystrova Svetlana , Begezhanova Shakizat
Published: April 2023

The work improves the algorithms for the formation of a steady state mode of electric power systems, developed on the basis of a topological model. The topological model is developed on the basis of the theory of directed graphs using a matrix of current distribution coefficients. Algorithms for the formation of a steady state provide for conducting calculations with respect to all independent nodes of a complex network of a power system, which leads to an increase in the number of operations of iterative processes. The paper proposes a transformation of the topological model of the system, in which, in the process of solving the transformed model, iteration is performed only over nodes that have non-zero load or generation powers. The rest of the nodal stresses are simply calculated through the stresses of the above nodes. The resulting transformation makes it possible to reduce not only the number of operations in each iteration, but also the number of iterations itself. In particular, when studying a 5-node test circuit [1], instead of four complex equations of the original system, it is sufficient to iterate only one equation (reduction by 25%), and for the New England test 39-node circuit [2], instead of 38 equations It is enough to iterate over 26 equations (32% reduction).
The influence of the market type in the electric power industry on its reliability on the example EPS of Russia
Authors: Chukreyev Mikhail
Published: April 2023

In modern conditions of competition in international markets, the cost of electricity has a huge impact on the ability of state to produce a competitive product. The percentage of electricity costs to goods manufactured in Russia is 2-2.5 higher than European countries, which undoubtedly affects competitiveness, and therefore leads to a decrease in Russia's growth rate. Therefore, work on the effectiveness of the energy industry is very important. The article discusses the mechanisms of energy markets, their features are given. The influence of selected mechanism on necessary full reserve of power is shown, the author’s vision on further actions in these matters is given.
On the feasibility of using distributed generation to tackle the issue of insufficient transmission capacity of power lines in urban area
Authors: Dmitry Gabdushev , Victor Buslov , Sergey Gusev , Andrey Okhlopkov , Vladislav Bitney
Published: April 2023

Issues related to the use of distributed generation for solving the problem of insufficient grid capacity in Moscow are analyzed. The problem area, where the current load of the power transmission line (TL) does not meet the requirements for the mode parameters is considered. The paper proposes an alternative way of tackling this problem by installing a low-capacity gas power plant (GPP) instead of reconstructing the power grid. Results obtained from this study can be used by electricity distribution companies as guidelines for solving the above problem.
New approaches and digital technology automation tasks processes of control and accounting of electricity in distribution networks
Authors: Omorov T.T. , Takyrbashev B.K. , Zakiryaev K.E. , Imanakunova Zh.S. , Koibagarov T.Zh. , Asiev A.T.
Published: April 2023

This paper studies 0.4 kV power distribution networks (PDN) and automated systems for electricity monitoring and metering (ASEMM) As is known, one of the main tasks of ASEMMs is the digitalization of PDNs, aimed at further improving the efficiency and reliability of their operation. It is advisable that new models, methods, and intelligent technologies used for automation and informatization of distribution networks should also be focused on minimizing their power losses, which are currently fairly high thus significantly compromising the technical and economic performance of automation systems employed and PDNs. Modern (conventional) ASEMMs, implemented at the facilities of utilities, do not have the appropriate technical, algorithmic, and software tools designed to reduce power losses in the PDN. This is due to the fact that conventional ASEMMs mainly solve the problem of remote data collection from the system meters and their digital processing for the purpose of revenue metering of electricity. In this regard, the paper proposes methodological, algorithmic, and digital technologies designed to solve a set of new functional tasks in the conventional ASEMMs, aimed at reducing power losses in DPNs by optimizing their operating conditions.
Improvement of distance protection algorithms based on phasor measurements
Authors: Mokeev Alexey V. , Piskunov Sergey A.
Published: April 2023

Distance protection of overhead lines is widely used and is continually being improved. However, the distance protection cannot work stably and is blocked in several electromechanical transients. Additionally, a non-linear arc can affect the stability of the distance protection in case of a short-circuit. The authors consider ways to improve distance protection during such transients. In particular, this paper proposes the use of synchronized phasor measurement technology to improve the efficiency of distance protection. This paper considers a new approach for the analysis of electromechanical and electromagnetic transients in a power system using process synchrophasors. As examples, cases of a short-circuit in a line with oneway and two-way powers are considered. The authors consider the influence of a non-linear arc at the fault point and consider the possibility of the coincidence of the electromechanical and electromagnetic transients. The result is a new algorithm for operating distance protection, an improvement in the parametric method for determining the location of line damage. The calculations performed and mathematical modeling confirm the effectiveness of the proposed algorithm.
Forecasting of electricity consumption by industrial enterprises with a continuous nature of production based on the principal component method (PCA)
Authors: Niyozov N.N. , Rikhsitillaev B.Kh. , Jalilova D.A. , Kuatbaev P.M.
Published: April 2023

Forecasting the consumption of electrical energy is important to improve its efficiency and, as a result, to improve the competitiveness of manufactured products by reducing the share of electricity costs in the cost of production. When determining the forecast indicators of electricity consumption by industrial enterprises, it is advisable to use modern high-precision forecasting methods that ensure the minimum value of the forecast error. Each enterprise must preliminarily determine, with the greatest possible accuracy, the amount and schedule of electricity consumption and then strictly adhere to them, thereby minimizing penalties and fines. The article deals with the issues of forecasting power consumption by industrial enterprises (on the example of a metallurgical enterprise) using the enlarged block diagram of the algorithm for predicting power consumption by the method of principal components (PCA) developed by the authors. Comparisons of the actual and predicted power consumption according to the developed model are made. The adequacy of the model is confirmed by small discrepancies between the actual and forecast data. This allows it to be used in determining the predicted values of power consumption parameters at ferrous metallurgy enterprises.
Economic interval analysis of loads for selection of cross-section surfaces of electrical transmission lines
Authors: Taslimov Abdurakhim , Rakhimov Farrukh , Rakhimov Feruz
Published: April 2023

In this article, the implementation of comprehensive measures for the use of modern approaches to the selection of the main parameters of the system in the development of the electric power industry of our Republic, including the development of methods for optimizing, updating and increasing the reliability of electric transmission networks, as well as the selection of the most optimal cross-sectional surface of the conductors of power transmission lines written about the problem and the widespread use of the method of economic intervals to solve this problem. In addition, the action strategy for the further development of the Republic of Uzbekistan in 2017-2021 defines the tasks of “… to reduce the energy and resource capacities of the economy, to widely introduce energy-saving technologies into production, which are implemented in accordance with the target parameters of reducing energy consumption in economic sectors,…” and these tasks. It has been reflected that determining the optimal parameters of electrical networks, carrying out theoretical and scientific work on increasing their reliability, and receiving appropriate recommendations for the design, construction, modernization and operation of rural electrical networks are considered to be one of the most important issues for implementation.
Evaluierung der Eltern-Kind-Interaktions Einschätzskala (EKIE) – adaptiert für Eltern-Kind-Dyaden nach kindlicher Cochlea Implantat-Versorgung – eine Pilotstudie
Authors: Martsch Anke , Metzeld Dennis , Helbig Silke , Seebens Yvonne
Published: April 2023

Unterschiede im Spracherwerb Cochlea-Implantat-(CI)-versorgter Kinder resultieren unter anderem aus der Interaktionsqualität des Kindes mit seinen Bezugspersonen. Derzeit fehlt jedoch ein praxistaugliches Instrument zu deren Erfassung.

Ziel der Pilotstudie ist die Evaluation der von den Autoren vorgenommenen Erweiterung der videogestützten Eltern-Kind-Interaktions Einschätzskala (EKIE) für die Zielgruppe der CI-versorgten Kinder. Die Ergänzung beinhaltet die Bewertung der elterlichen Verhaltensweisen und Sprachangebote zur Förderung der Hör- und Lautsprachentwicklung. Die Studie untersucht Validität und Reliabilität der adaptierten Fassung (EKIE-hör) sowie die Zeitökonomie der Durchführung. Hierzu wurden sechs Videos von Eltern-Kind-Interaktionen durch neun Mitarbeiter mittels EKIE-hör (5-stufige Skala) bewertet. Die Reliabilität der Bewertungen wurde mit Hilfe einer Intraklassenkorrelation (ICC) basierend auf durchschnittlichen Maßen in einem zweifach gemischten Konsistenzmodell bestimmt.

Die ICC ergab für die meisten Variablen Raterübereinstimmungen im guten bis exzellenten Bereich. Nach mehrmonatiger Implementierung des EKIE-hör in den therapeutischen Alltag erfolgte eine Befragung der therapeutischen Fachkräfte zur Durchführungsdauer, die zeigte, dass die Interaktionsqualität mit Hilfe der EKIE-hör zeitökonomisch (Median: 5–10 Minuten) eingeschätzt werden kann.
Recent Developments in Ultrasound-Promoted Aqueous-Mediated Greener Synthesis of Biologically Vital Indole Derivatives
Authors: Dandia Anshu , Jain Meenakshi , Sharma Amit , Choupra Kanaram , Aheer Ashish Kumar
Published: April 2023

The extensive range of uses of N-heterocycles as potent bioactive motifs has attracted researchers to expand newer methods for their efficient synthesis. Particularly, indoles are widely known for their prevalent pharmacological properties. Green chemistry provides various synthetic tools viz. alternative energy resources, nonconventional solvents, nano-catalysts, etc. Modern strategies of using ultrasound as an alternative energy resource in organic synthesis has led to the development of environment friendly and cost-effective techniques. The chemical and mechanical effects of ultrasound waves impart significant enhancement in both stoichiometric and catalytic reactions. The exclusive physicochemical properties of water offer widespread utility for carrying out organic reactions in this medium. The aim of this review article is to provide an inclusive summary of the combined use of ultrasound and aqueous media for the facile synthesis of biologically vital indole derivatives.

1 Introduction

2 Synthesis of Biologically Vital Indoles

2.1 Spirocyclic Indoles

2.2 Non-spiro 3-Substituted Indoles

2.3 Miscellaneous Indole Syntheses

3 Conclusions
Minimal-Invasive Mitral Valve Repair after Breast Augmentation
Authors: Schaeffer Thibault , Koechlin Luca , Kappos Elisabeth Artemis , Eckstein Friedrich Stefan
Published: April 2023

Minimal-invasive mitral valve surgery after breast augmentation is an ongoing interdisciplinary challenge. Notably, the perioperative explantation of the breast implant, as reported in most cases, is of questionable benefit. We herein report on successful minimal-invasive mitral valve repair after subpectoral breast augmentation with perioperative preservation of the breast implant in situ.
Acute Bronchiolitis in Term Newborns Following Relaxation in COVID-19 Appropriate Behavior
Authors: Qureshi Umar Amin , Bhat Abdus Sami , Lone Mohd Suhail , Jan Muzafar , Wani Nisar Ahmad , Shah Mubashir Hassan
Published: April 2023

Objective Neonatal bronchiolitis is not well characterized. We studied the profile of acute bronchiolitis in term newborns during a respiratory syncytial virus (RSV) surge following relaxation in coronavirus disease 2019 (COVID-19) appropriate behavior.

Methods This was a retrospective descriptive study performed in the neonatology division of a tertiary care pediatric hospital at Srinagar, Jammu and Kashmir, India. Term neonates (born at ≥37 completed gestational weeks) from 7 up to 28 days of life admitted with bronchiolitis over a 1-month period (November 2021) were included.

Results Out of total 480 neonatal admissions over a month, 35 (7%) had acute bronchiolitis. Eight neonates were excluded. Out of 27 included neonates, 13 were males. Mean age at presentation was 20 days. All neonates were born at term (≥37 completed gestational weeks). Cough (26), rapid breathing (20), and lower chest indrawing (20) were the predominant presenting features. Median SPO2 was 87% (interquartile range 85–92%). Fourteen (52%) neonates needed admission to neonatal intensive care unit. Respiratory support was needed in the form of oxygen through nasal prongs in 24 (89%) newborns. Heated humidified high-flow nasal cannula (HHHFNC) and bubble continuous positive airway pressure were used in five neonates each. Two neonates were mechanically ventilated. The mean duration of the hospital stay was 6.2 days. All neonates survived.

Conclusion A series of 27 term neonates with bronchiolitis during an RSV surge is reported in the aftermath of lifting of COVID-19 restrictions. Many of these neonates were sick enough to require significant respiratory support. The outcome was good in all neonates.
Hidden in plain sight: Lindauera gen. nov.: a new genus of Dictyotales from New Zealand
Authors: Nelson Wendy A. , Sutherland Judy E.
Published: April 2023

A new genus in the Dictyotales, Lindauera, is described based on the species Dictyota papenfussii Lindauer from Taranaki, North Island, New Zealand. Lindauera is distinguished from Dictyota by both molecular data and by the possession of primary, prostrate dichotomously branched axes that attach thalli to substrates. We present data extending the known distribution of this species within New Zealand and confirm its occurrence in Australia.
Performance analysis of heat pipe-cooled two-stage thermoelectric air conditioner
Authors: Meng Fankai , Sun Yuetong , Cheng Zhaojun
Published: April 2023

A detailed model of heat pipe-cooled two-stage thermoelectric (TE) air conditioner is established. The performance is analysed comprehensively including the cooling power, coefficient of performance (COP), thermodynamic perfectibility and extreme temperature difference. The influences of key parameters including working current, distribution ratio of TE elements and heat pipe parameters are analysed by numerical simulation. The working current and the TE element number ratio are optimized for the maximum cooling power and the maximum COP respectively. The influences of the cross-sectional area, the length of the TE element and the temperature difference on the optimal variables and optimal performance is obtained. The results show the refrigeration performance of the TE air conditioner can be effectively improved by heat pipe cooling. The two-stage mode can effectively improve the refrigeration temperature difference. The extreme temperature difference can be improved from 60 K to 110 K.
Analysis of water supply system characteristics and water hammer protection measures in hilly towns
Authors: Yuan Wenqi
Published: April 2023

The terrain of hilly areas is undulating. The water supply system of small towns in this area is characterized by small scale of water consumption, large variation of water quantity, complex operation of pipe network, frequent start and stop of pumps, poor integrity of pipe network and low safety and reliability. Therefore, the layout and operation management of water supply pipe network caused many problems, and the water hammer protection of pipe network can not be ignored. Taking K town in typical hilly area as the object, the characteristics of water supply are investigated and analyzed, and the water hammer and protection measures are analyzed, in order to provide reference for the safe and stable operation of water supply network in small towns in hilly area.
CFD study of two-phase cross flow and heat transfer in sub-channels of pressurized water reactor fuel assemblies
Authors: Xiao Han , Yang Ting , Xie Aoda
Published: April 2023

The safety of nuclear power systems is extremely important. The development of nuclear power is predicated on the safety of the system. Under certain operating conditions, the coolant flowing through the fuel assembly will undergo phase change, resulting in gas-liquid two-phase flow. The existence of the two-phase flow will change the stability of the coolant flow and thus affect the reliability of the core instrumentation under accident conditions. The presence of the two-phase flow will also change the heat transfer coefficient of the coolant, thus affecting the temperature distribution on the surface of the instrument guide tube. This paper adopts the computational fluid dynamics method. On the one hand, this paper calculates the two-phase cross flow of the two-channel. By changing the inlet boundary conditions to achieve the elimination of diversion cross flow, the two-phase cross flow phenomenon was observed, which laid the foundation for future experiments. On the other hand, calculations of the surface temperature of the instrument guide tube. The surrounding flow field show that the temperature of the surface of the instrument guide tube is higher in two phases than in one phase. The gas phase moves to the surface of the instrument guide tube.
Research on the selection of high voltage submarine AC cables for long distance offshore wind farm
Authors: Jiang Yumeng , Qi Yuchen , Zhao Gangchao , Li Hao’en , Pang Aili , Huang Ruanming , Song Tianli , Zhou Ziyang
Published: April 2023

With the increase distance of offshore wind farm, the investment proportion of high-voltage delivery submarine cable in the whole project is gradually increasing, so the reasonable selection of cable delivery scheme becomes more and more important. In this paper, for different scales of offshore wind farms, the preliminary selection basis of two delivery schemes of AC high-voltage and flexible DC is proposed, and the economic and technical comparison principles of different AC delivery schemes are further analyzed with engineering example. In general, for medium-sized offshore wind farms, if the AC high-voltage transmission scheme is used, a reactive power compensation station can be set in the middle of the cable to improve the current distribution on the cable.
Study on flue gas waste heat utilization system optimization of a new 1000MW unit
Authors: Li Shuai , Li Kuan , Qu Yaopeng , An Hongjia , Xue Ligang
Published: April 2023

In this paper, the flue gas waste heat utilization system in a new 1000MW unit was as the research object, and the numerical simulations on the flue flow field and resistance characteristics of the low-temperature economizer for four operating conditions without guiding device or with three kind guiding devices was carried out by computational fluid dynamics software, and the correctness of the numerical simulation result was verified by the guaranteed value of the low-temperature economizer manufacturer. The results show that: The simulation result was basically consistent with the guaranteed value of the low-temperature economizer manufacturer, which was shown the correctness of the simulation calculation; the flue gas flow of low-temperature economizer without guiding device was unevenly distributed, with high-speed area and ash prone area; the additional guiding devices can reduce the inlet deflection angle of the low-temperature economizer, which can effectively reduce the speed deviation and improve the flow field distribution; The effect of flow equalization and resistance characteristics of the guiding devices first decreases and then increases with the number of guiding devices; The unreasonable selection of the number and position of the guiding devices will cause the flue gas to rush on the flue and cause the risk of flue vibration. In order to promote the realization of the transformation purpose, the improvement effect of the guiding devices should be simulated and calculated before the transformation.
The current state on China’s marine energy industry policy
Authors: Ni Na
Published: April 2023

At present, China’s marine energy industry is still in its infancy, but there is no doubt that the development of this industry will help China to achieve sustainable development. Therefore, effective policies are needed to promote the industrialization of the industry as soon as possible. This paper systematically consulted the relevant information on the research and development of marine renewable energy, focusing on China’s marine energy industry policy, including the national energy strategy, the progress of China’s marine energy policy, technology policy, market policy and other related content, emphasizing the importance of marine energy policy in promoting the development of marine energy industry. Finally, in view of the deficiencies in the development of marine energy industry in China, the corresponding improvement strategies are put forward.
System design and analysis of refrigerated containers utilizing LNG cold energy
Authors: Yang Qingyong , Yue Rongqin , Lin Yiqun , Guo Chao , Li Boyang
Published: April 2023

In order to solve the problems of excess cold energy of the fuel and large power load required for refrigeration of refrigerated containers on LNG powered container ships, this study proposes a scheme to use the fuel cold energy of LNG powered container ships for refrigerated containers, the process simulation software Aspen HYSYS is used to simulate the cold energy utilization scheme, with the help of MATLAB, the multivariable optimization research on the cold energy utilization scheme of LNG powered container ship is carried out, taking the cold energy utilization rate of LNG cold energy scheme as the objective function, the LNG cold energy utilization scheme is optimized.