bluuebunny/crossref_metadata_2025 huggingface dataset:
Initial Experience Performing Mechanical Thrombectomy With the CatchView Mini Device for Distal M2 Segment Middle Cerebral Artery Occlusions
Authors: Vega Pedro , Murias Eduardo , Jimenez Jose María , Chaviano Juan , Benavente Lorena , Gonzalez-Delgado Montserrat , García-Arias Faustino , Pumar José Manuel
Published: September 2021

Background: Mechanical thrombectomy (MT) has become the standard of care for acute ischemic stroke due to large vessel occlusion; however, its safety and efficacy in patients with distal strokes remains unclear. In this study, we investigated the safety and efficacy of MT for distal middle cerebral artery (MCA) occlusions using the CatchView Mini (CVM; Balt, Montmorency, France).

Methods: This was a prospective single-center analysis of patients with a single MCA-M2 occlusion treated with the CVM device. Consecutive patients were prospectively enrolled from October 2018 to March 2020. Efficacy outcomes included successful recanalization [modified Thrombolysis in Cerebral Infarction (mTICI) 2b/3], procedure times, and number of device passes. Clinical outcomes included National Institutes of Health Stroke Scale Score (NIHSS) at discharge, 90-day functional independence (modified Rankin Scale 0–2) and safety outcomes included hemorrhagic complications, and 90-day mortality.

Results: A total of 45 patients (mean age: 74.0 ± 12.6; 53.3% [24/45] female) were included in the study. Upon admission, 33.3% (15/45) of patients were mRS 3–5; and mean NIHSS was 13.2 ± 4.2 Mean time from symptom onset to final angiography was 250.0 ± 83.4 min with a mean intervention duration of 34.0 ± 12.6 min. The mean number of device passes was 1.8 ± 1.5 final mTICI 2b/3 was achieved in 91.1% (41/45) of patients. Eight hemorrhagic complications (17.8%, 8/34) occurred, none of which were symptomatic. At 90-days, 57.8% (26/45) patients were functionally independent and the rate of mortality was 15.6% (7/45).

Conclusions: The present analysis demonstrates a low risk profile and high recanalization success for patients with distal M2 occlusions treated with the CVM device.
Cerebrospinal Fluid MicroRNA Changes in Cognitively Normal Veterans With a History of Deployment-Associated Mild Traumatic Brain Injury
Authors: Lusardi Theresa A. , Sandau Ursula S. , Sakhanenko Nikita A. , Baker Sarah Catherine B. , Wiedrick Jack T. , Lapidus Jodi A. , Raskind Murray A. , Li Ge , Peskind Elaine R. , Galas David J. , Quinn Joseph F. , Saugstad Julie A.
Published: September 2021

A history of traumatic brain injury (TBI) increases the odds of developing Alzheimer’s disease (AD). The long latent period between injury and dementia makes it difficult to study molecular changes initiated by TBI that may increase the risk of developing AD. MicroRNA (miRNA) levels are altered in TBI at acute times post-injury (<4 weeks), and in AD. We hypothesized that miRNA levels in cerebrospinal fluid (CSF) following TBI in veterans may be indicative of increased risk for developing AD. Our population of interest is cognitively normal veterans with a history of one or more mild TBI (mTBI) at a chronic time following TBI. We measured miRNA levels in CSF from three groups of participants: (1) community controls with no lifetime history of TBI (ComC); (2) deployed Iraq/Afghanistan veterans with no lifetime history of TBI (DepC), and (3) deployed Iraq/Afghanistan veterans with a history of repetitive blast mTBI (DepTBI). CSF samples were collected at the baseline visit in a longitudinal, multimodal assessment of Gulf War veterans, and represent a heterogenous group of male veterans and community controls. The average time since the last blast mTBI experienced was 4.7 ± 2.2 years [1.5 – 11.5]. Statistical analysis of TaqManTM miRNA array data revealed 18 miRNAs with significant differential expression in the group comparisons: 10 between DepTBI and ComC, 7 between DepC and ComC, and 8 between DepTBI and DepC. We also identified 8 miRNAs with significant differential detection in the group comparisons: 5 in DepTBI vs. ComC, 3 in DepC vs. ComC, and 2 in DepTBI vs. DepC. When we applied our previously developed multivariable dependence analysis, we found 13 miRNAs (6 of which are altered in levels or detection) that show dependencies with participant phenotypes, e.g., ApoE. Target prediction and pathway analysis with miRNAs differentially expressed in DepTBI vs. either DepC or ComC identified canonical pathways highly relevant to TBI including senescence and ephrin receptor signaling, respectively. This study shows that both TBI and deployment result in persistent changes in CSF miRNA levels that are relevant to known miRNA-mediated AD pathology, and which may reflect early events in AD.
Measuring Correlates of Mental Workload During Simulated Driving Using cEEGrid Electrodes: A Test–Retest Reliability Analysis
Authors: Getzmann Stephan , Reiser Julian E. , Karthaus Melanie , Rudinger Georg , Wascher Edmund
Published: September 2021

The EEG reflects mental processes, especially modulations in the alpha and theta frequency bands are associated with attention and the allocation of mental resources. EEG has also been used to study mental processes while driving, both in real environments and in virtual reality. However, conventional EEG methods are of limited use outside of controlled laboratory settings. While modern EEG technologies offer hardly any restrictions for the user, they often still have limitations in measurement reliability. We recently showed that low-density EEG methods using film-based round the ear electrodes (cEEGrids) are well-suited to map mental processes while driving a car in a driving simulator. In the present follow-up study, we explored aspects of ecological and internal validity of the cEEGrid measurements. We analyzed longitudinal data of 127 adults, who drove the same driving course in a virtual environment twice at intervals of 12–15 months while the EEG was recorded. Modulations in the alpha and theta frequency bands as well as within behavioral parameters (driving speed and steering wheel angular velocity) which were highly consistent over the two measurement time points were found to reflect the complexity of the driving task. At the intraindividual level, small to moderate (albeit significant) correlations were observed in about 2/3 of the participants, while other participants showed significant deviations between the two measurements. Thus, the test-retest reliability at the intra-individual level was rather low and challenges the value of the application for diagnostic purposes. However, across all participants the reliability and ecological validity of cEEGrid electrodes were satisfactory in the context of driving-related parameters.
Beam Angle Optimization for Double-Scattering Proton Delivery Technique Using an Eclipse Application Programming Interface and Convolutional Neural Network
Authors: Cheon Wonjoong , Ahn Sang Hee , Jeong Seonghoon , Lee Se Byeong , Shin Dongho , Lim Young Kyung , Jeong Jong Hwi , Youn Sang Hee , Lee Sung Uk , Moon Sung Ho , Kim Tae Hyun , Kim Haksoo
Published: September 2021

To automatically identify optimal beam angles for proton therapy configured with the double-scattering delivery technique, a beam angle optimization method based on a convolutional neural network (BAODS-Net) is proposed. Fifty liver plans were used for training in BAODS-Net. To generate a sequence of input data, 25 rays on the eye view of the beam were determined per angle. Each ray collects nine features, including the normalized Hounsfield unit and the position information of eight structures per 2° of gantry angle. The outputs are a set of beam angle ranking scores (Sbeam) ranging from 0° to 359°, with a step size of 1°. Based on these input and output designs, BAODS-Net consists of eight convolution layers and four fully connected layers. To evaluate the plan qualities of deep-learning, equi-spaced, and clinical plans, we compared the performances of three types of loss functions and performed K-fold cross-validation (K = 5). For statistical analysis, the volumes V27Gy and V30Gy as well as the mean, minimum, and maximum doses were calculated for organs-at-risk by using a paired-samples t-test. As a result, smooth-L1 loss showed the best optimization performance. At the end of the training procedure, the mean squared errors between the reference and predicted Sbeam were 0.031, 0.011, and 0.004 for L1, L2, and smooth-L1 loss, respectively. In terms of the plan quality, statistically, PlanBAO has no significant difference from PlanClinic (P >.05). In our test, a deep-learning based beam angle optimization method for proton double-scattering treatments was developed and verified. Using Eclipse API and BAODS-Net, a plan with clinically acceptable quality was created within 5 min.
Ceftazidime-Avibactam Therapy Versus Ceftazidime-Avibactam-Based Combination Therapy in Patients With Carbapenem-Resistant Gram-Negative Pathogens: A Meta-Analysis
Authors: Li Dan , Fei Fan , Yu Hua , Huang Xiangning , Long Shanshan , Zhou Hao , Zhang Jie
Published: September 2021

Objective: To systematically review and compare the efficacy and posttreatment resistance of ceftazidime-avibactam therapy and ceftazidime-avibactam-based combination therapy in patients with Gram-negative pathogens.

Methods: PubMed, Embase, Web of Science, CNKI, and Wanfang Data databases were searched from their inception up to March 31, 2021, to obtain studies on ceftazidime-avibactam therapy versus ceftazidime-avibactam-based combination therapy in patients with carbapenem-resistant Gram-negative pathogens. The primary outcome was mortality rate, and the second outcomes were microbiologically negative, clinical success, and the development of resistance after ceftazidime-avibactam treatment.

Results: Seventeen studies representing 1,435 patients (837 received ceftazidime-avibactam-based combination therapy and 598 received ceftazidime-avibactam therapy) were included in the meta-analysis. The results of the meta-analysis showed that no statistically significant difference was found on mortality rate (Petos odds ratio (OR) = 1.03, 95% confidence interval (CI) 0.79–1.34), microbiologically negative (OR = 0.99, 95% CI 0.54–1.81), and clinical success (OR =0.95, 95% CI 0.64–1.39) between ceftazidime-avibactam-based combination therapy and ceftazidime-avibactam therapy. Although there was no difference in posttreatment resistance of ceftazidime-avibactam (OR = 0.65, 95% CI 0.34–1.26) in all included studies, a trend favoring the combination therapy was found (according to the pooled three studies, OR = 0.18, 95% CI 0.04–0.78).

Conclusions: The current evidence suggests that ceftazidime-avibactam-based combination therapy may not have beneficial effects on mortality, microbiologically negative, and clinical success to patients with carbapenem-resistant Gram-negative pathogens. A trend of posttreatment resistance occurred more likely in ceftazidime-avibactam therapy than the combination therapy. Due to the limited number of studies that can be included, additional high-quality studies are needed to verify the above conclusions.
Creation of Anatomically Correct and Optimized for 3D Printing Human Bones Models
Authors: Edelmers Edgars , Kazoka Dzintra , Pilmane Mara
Published: September 2021

Educational institutions in several countries state that the education sector should be modernized to ensure a contemporary, individualized, and more open learning process by introducing and developing advance digital solutions and learning tools. Visualization along with 3D printing have already found their implementation in different medical fields in Pauls Stradiņš Clinical University Hospital, and Rīga Stradiņš University, where models are being used for prosthetic manufacturing, surgery planning, simulation of procedures, and student education. The study aimed to develop a detailed methodology for the creation of anatomically correct and optimized models for 3D printing from radiological data using only free and widely available software. In this study, only free and cross-platform software from widely available internet sources has been used—“Meshmixer”, “3D Slicer”, and “Meshlab”. For 3D printing, the Ultimaker 5S 3D printer along with PLA material was used. In its turn, radiological data have been obtained from the “New Mexico Decedent Image Database”. In total, 28 models have been optimized and printed. The developed methodology can be used to create new models from scratch, which can be used will find implementation in different medical and scientific fields—simulation processes, anthropology, 3D printing, bioprinting, and education.
Improved Filtering Techniques for Single- and Multi-Trace Side-Channel Analysis
Authors: Salomon Dor , Weiss Amir , Levi Itamar
Published: September 2021

Side-channel analysis (SCA) attacks constantly improve and evolve. Implementations are therefore designed to withstand strong SCA adversaries. Different side channels exhibit varying statistical characteristics of the sensed or exfiltrated leakage, as well as the embedding of different countermeasures. This makes it crucial to improve and adapt pre-processing and denoising techniques, and abilities to evaluate the adversarial best-case scenario. We address two popular SCA scenarios: (1) a single-trace context, modeling an adversary that captures only one leakage trace, and (2) a multi-trace (or statistical) scenario, that models the classical SCA context. Given that horizontal attacks, localized electromagnetic attacks and remote-SCA attacks are becoming evermore powerful, both scenarios are of interest and importance. In the single-trace context, we improve on existing Singular Spectral Analysis (SSA) based techniques by utilizing spectral property variations over time that stem from the cryptographic implementation. By adapting overlapped-SSA and optimizing over the method parameters, we achieve a significantly shorter computation time, which is the main challenge of the SSA-based technique, and a higher information gain (in terms of the Signal-to-Noise Ratio (SNR)). In the multi-trace context, a profiling strategy is proposed to optimize a Band-Pass Filter (BPF) based on a low-computational cost criterion, which is shown to be efficient for unprotected and low protection level countermeasures. In addition, a slightly more computationally intensive optimized ‘shaped’ filter is presented that utilizes a frequency-domain SNR-based coefficient thresholding. Our experimental results exhibit significant improvements over a set of various implementations embedded with countermeasures in hardware and software platforms, corresponding to varying baseline SNR levels and statistical leakage characteristics.
Mood Disorder Detection in Adolescents by Classification Trees, Random Forests and XGBoost in Presence of Missing Data
Authors: Turska Elzbieta , Jurga Szymon , Piskorski Jaroslaw
Published: September 2021

We apply tree-based classification algorithms, namely the classification trees, with the use of the rpart algorithm, random forests and XGBoost methods to detect mood disorder in a group of 2508 lower secondary school students. The dataset presents many challenges, the most important of which is many missing data as well as the being heavily unbalanced (there are few severe mood disorder cases). We find that all algorithms are specific, but only the rpart algorithm is sensitive; i.e., it is able to detect cases of real cases mood disorder. The conclusion of this paper is that this is caused by the fact that the rpart algorithm uses the surrogate variables to handle missing data. The most important social-studies-related result is that the adolescents’ relationships with their parents are the single most important factor in developing mood disorders—far more important than other factors, such as the socio-economic status or school success.
Impacts of COVID-19 Pandemic on the Mental Health of Working Adults in the Czech Republic: Analysis of Self-Report Psychological Data in a One Year Perspective
Authors: Kučera Dalibor , Stuchlíková Iva , Mrhálek Tomáš
Published: September 2021

The article presents research evidence on psychological impacts of the COVID-19 pandemic on the economically active Czech population aged 18–64 (n = 1603; 365 men and 1238 women) within a one year perspective. The aim is to describe the differences in the reported mental health indicators (anxiety, depression, and distress) for women and men in the four age groups, two groups with different working statuses (continuation of work/interrupted working status), and between two phases of the epidemic (March to May 2020 and September 2020 to February 2021). The results point to elevated scores of negative mental health indicators (anxiety, depression, and distress) in different subgroups. More negative experiences in a pandemic situation were found, especially in groups of women, people under the age of 35, and among people with interrupted working status. The results also indicate a deterioration of symptoms over time during the epidemic.
Development of a Multi-Segment Parallel Compressor Model for a Boundary Layer Ingesting Fuselage Fan Stage
Authors: Voigt Jonas , Friedrichs Jens
Published: September 2021

The present methodological study aims to assess boundary layer ingestion (BLI) as a promising method to improve propulsion efficiency. BLI utilizes the low momentum inflow of the wing or fuselage boundary layer for thrust generation in order to minimize the required propulsive power for a given amount of thrust for wing or fuselage-embedded engines. A multi-segment parallel compressor model (PCM) is developed to calculate the power saving from full annular BLI as occurring at a fuselage tail center-mounted aircraft engine, employing radially subdivided fan characteristics. Applying this methodology, adverse effects on the fan performance due to varying inlet distortions depending on flight operating point as well as upstream boundary layer suction can be taken into account. This marks one step onto a further segmented PCM model for general cases of BLI-induced inlet distortion and allows the evaluation of synergies between combined BLI and active laminar flow control as a drag reduction measure. This study, therefore, presents one further step towards lower fuel consumption and, hence, a lower environmental impact of future transport aircraft.
Analysis of Power Bank Quality Criteria That Are Important from the Consumer’s Point of View
Authors: Czerniak Jacek , Gacek Anna , Szopa Przemysław
Published: September 2021

Consumers of mobile devices expect manufacturers to produce devices that will be an efficient source of electric energy. The batteries currently used in smartphones allow the devices to operate for several hours. Power banks extend the operating time of the device without the need to charge via a charger connected to the mains. The present paper defines first the features of power banks that are the most important for users and, moreover, what knowledge or opinions about important power bank features customers use during purchase. As shown in the survey, according to the respondents, the most important feature determining the quality of a power bank is its capacity. It has been shown in this research that the actual capacity of a power bank is circa 2/3 of the capacity indicated. What have also been investigated are the differences between the average capacities of power banks with Li-ion batteries and the technologically newer Li-Po batteries, in favor of the latter. Power banks were not differentiated according to the type of battery and charging times in the standard variant, with a voltage of 5 V. It has been shown that the smaller usable capacity of the power bank does not affect the faster charging time.
A Unique Electrical Model for the Steady-State Analysis of a Multi-Energy System
Authors: Vidović Danko , Sutlović Elis , Majstrović Matislav
Published: September 2021

In order to decarbonize the energy sector, the interdependencies between the power and natural gas systems are going to be much stronger in the next period. Thus, it is necessary to have a powerful simulation model that is able to efficiently and simultaneously solve all coupled energy carriers in a single simulation environment in only one simulation step. As an answer to the described computational challenges, a unique model for the steady-state analysis of a multi-energy system (MES) using the electrical analogy approach is developed. Detailed electrical equivalent models, developed using the network port theory and the load flow method formulation, of the most important natural gas network elements, as well as of the linking facilities between the power and natural gas systems, are given. The presented models were loaded up into a well-known software for the power system simulation—NEPLAN. In the case studies, the accuracy of the presented models is confirmed by the comparison of the simulation results with the results obtained by SIMONE—a well-known software for natural gas network simulations. Moreover, the applicability of the presented unique model is demonstrated by the MES security of a supply analysis.
Stabilization of Rock Roadway under Obliquely Straddle Working Face
Authors: Wang Peng , Zhang Nong , Kan Jiaguang , Wang Bin , Xu Xingliang
Published: September 2021

A floor rock roadway under an oblique straddle working face is a typical dynamic pressure roadway. Under the complex disturbance of excavation engineering works, the roadway often undergoes stress concentration and severe deformation and damage. To solve the problem of surrounding rock stability control for this roadway type, this study considered the East Forth main transport roadway in the floor strata of the 1762(3) working face of the Pansan coal mine. In situ ground pressure monitoring and numerical simulation calculation using the FLAC2D software were carried out. The influence laws of the surrounding rock lithology, the vertical and horizontal distance between the roadway and overlying working face, the positional relationship between the roadway and the overlying working face, and the support form and strength of the rock surrounding an oblique straddle roadway were obtained. Within the range of mining influence, the properties of the rock surrounding the roof and floor were very different, and the deformation of the rock surrounding the two sides exhibited regional difference. The influence range of the mining working face on the rock floor of the roadway was approximately 30–40 m, and that of horizontal mining was approximately 50–60 m. The mining influence on the rock surrounding the side roadway of the working face is large, but the mining influence on the roadway below is small. Using FLAC2D, the stress and displacement characteristics of the rock surrounding the obliquely straddle roadway were compared and analyzed when the bolt support, combined bolt and shed support, and bolt–shotcreting–grouting support were adopted, the proposed support scheme of bolting and shotcreting was successfully applied. The deformation of the rock surrounding the roadway was satisfactorily controlled, and the results were useful as a reference for similar roadway maintenance projects.
Prediction and Analysis of the Thermal Performance of Composite Vacuum Glazing
Authors: Shi Yangjie , Xi Xiaobo , Zhang Yifu , Xu Haiyang , Zhang Jianfeng , Zhang Ruihong
Published: September 2021

In this paper, a prediction method of the heat transfer coefficient of composite vacuum glazing (CVG) is proposed. By analyzing the heat transfer process of CVG, the theoretical calculation formula for the heat transfer coefficient of CVG is established. CVG temperature variation under the test conditions specified in the national standard is simulated using ANSYS. The CVG heat transfer coefficient is calculated by combining the theoretical formula and simulation results. The simulation results are then verified by comparison to a physical experiment. The results show that the deviations between the experimental and predicted values are ≤3.8%, verifying the accuracy of the simulation results and proving that the model can be used in engineering practice. Furthermore, the effects of different coating positions on the heat transfer performance of CVG are studied. The results show that different coating positions have a significant impact on the heat transfer coefficient of CVG. The heat transfer coefficient is shown to be lowest to highest under the following conditions: when the Low-E coatings are located on both sides of the vacuum layer (2LC-V), followed by Low-E coatings on the side of glass pane II near the vacuum layer (1LC-V), Low-E coatings located on the side of glass pane I near insulating layer (1LC-I), and finally, when there are no Low-E coatings (NLC) on the glass panes. Overall, this model is an effective and accurate analysis method of the heat transfer coefficient.
Analysis of Magnetic Nondestructive Measurement Methods for Determination of the Degradation of Reactor Pressure Vessel Steel
Authors: Vértesy Gábor , Gasparics Antal , Szenthe Ildikó , Rabung Madalina , Kopp Melanie , Griffin James M.
Published: September 2021

Nondestructive magnetic measurement methods can be successfully applied to determine the embrittlement of nuclear pressure vessel steel caused by neutron irradiation. It was found in previous works that reasonable correlation could be obtained between the nondestructively measured magnetic parameters and destructively determined ductile-to-brittle transition temperature. However, a large scatter of the measurement points was detected even in the cases of the non-irradiated reference samples. The reason for their scattering was attributed to the local inhomogeneity of material. This conclusion is verified in the present work by applying three different magnetic methods on two sets of Charpy samples made of two different reactor steel materials. It was found that by an optimal magnetic pre-selection of samples, a good, linear correlation can be found between magnetic parameters as well as the ductile-to-brittle transition temperature with low scattering of points. This result shows that neutron irradiation embrittlement depends very much on the local material properties.
Modeling and Characterization of Complex Concentrated Alloys with Reduced Content of Critical Raw Materials
Authors: Șerban Beatrice-Adriana , Badea Ioana-Cristina , Constantin Nicolae , Mitrică Dumitru , Olaru Mihai Tudor , Burada Marian , Anasiei Ioana , Bejan Simona-Elena , Ghiță Andreea-Nicoleta , Popescu Ana Maria-Julieta
Published: September 2021

The continuous development of society has increased the demand for critical raw materials (CRMs) by using them in different industrial applications. Since 2010, the European Commission has compiled a list of CRMs and potential consumption scenarios with significant economic and environmental impacts. Various efforts were made to reduce or replace the CRM content used in the obtaining process of high-performance materials. Complex concentrated alloys (CCAs) are an innovative solution due to their multitude of attractive characteristics, which make them suitable to be used in a wide range of industrial applications. In order to demonstrate their efficiency in use, materials should have improved recyclability, good mechanical or biocompatible properties, and/or oxidation resistance, according to their destination. In order to predict the formation of solid solutions in CCAs and provide the optimal compositions, thermodynamic and kinetic simulations were performed. The selected compositions were formed in an induction furnace and then structurally characterized with different techniques. The empirical results indicate that the obtained CCAs are suitable to be used in advanced applications, providing original contributions, both in terms of scientific and technological fields, which can open new perspectives for the selection, design, and development of new materials with reduced CRM contents.
Oxygenated Cembrene Diterpenes from Sarcophyton convolutum: Cytotoxic Sarcoconvolutum A–E
Authors: Mohamed Tarik A. , Elshamy Abdelsamed I. , Abdel-Tawab Asmaa M. , AbdelMohsen Mona M. , Ohta Shinji , Pare Paul W. , Hegazy Mohamed-Elamir F.
Published: September 2021

The soft coral genus Sarcophyton contains the enzymatic machinery to synthesize a multitude of cembrene-type diterpenes. Herein, highly oxygenated cembrenoids, sarcoconvolutum A–E (1–5) were purified and characterized from an ethyl acetate extract of the red sea soft coral, Sarcophyton convolutum. Compounds were assemblies according to spectroscopic methods including FTIR, 1D- and 2D-NMR as well as HRMS. Metabolite cytotoxicity was tested against lung adenocarcinoma, cervical cancer, and oral-cavity carcinoma (A549, HeLa and HSC-2, respectively). The most cytotoxic compound, (4) was observed to be active against cell lines A549 and HSC-2 with IC50 values of 49.70 and 53.17 μM, respectively.
Guest Editorial Special Issue on Time-Sensitive Networks for Unmanned Aircraft Systems
Authors: Kim Hwangnam , Jung Yong Wun , Zhang Honghai
Published: September 2021

In this special issue, we explored swarming, network management, routing for multipath, communications, service applications, detection and identification, computation offloading, and cellular network-based control in time-sensitive networks of unmanned aircraft systems.
Semantic VPS for Smartphone Localization in Challenging Urban Environments
Authors: Lee Max Jwo Lem , Hsu Li-Ta , Ng Hoi-Fung
Published: September 2021

Accurate smartphone-based outdoor localization systems in deep urban canyons are increasingly needed for various IoT applications. As smart cities have developed, building information modeling (BIM) has become widely available. This article, for the first time, presents a semantic Visual Positioning System (VPS) for accurate and robust position estimation in urban canyons where the global navigation satellite system (GNSS) tends to fail. In the offline stage, a material segmented BIM is used to generate segmented images. In the online stage, an image is taken with a smartphone camera that provides textual information about the surrounding environment. The approach utilizes computer vision algorithms to segment between the different types of material class identified in the smartphone image. A semantic VPS method is then used to match the segmented generated images with the segmented smartphone image. Each generated image contains position information in terms of latitude, longitude, altitude, yaw, pitch, and roll. The candidate with the maximum likelihood is regarded as the precise position of the user. The positioning result achieved an accuracy of 2.0 m among high-rise buildings on a street, 5.5 m in a dense foliage environment, and 15.7 m in an alleyway. This represents an improvement in positioning of 45% compared to the current state-of-the-art method. The estimation of yaw achieved accuracy of 2.3°, an eight-fold improvement compared to the smartphone IMU.
Research on the Frequency Response and Dynamic Range of the Quadrature Fiber Optic Fabry–Perot Cavity Microphone Based on the Differential Cross Multiplication Demodulation Algorithm
Authors: Ren Baokai , Cheng Jin , Zhao Longjiang , Zhu Zhenghou , Zou Xiaoping , Qin Lei , Wang Yifei
Published: September 2021

A quadrature fiber optic Fabry–Perot cavity microphone based on a differential cross multiplication algorithm consists of a pair of fibers and a membrane. It has many advantages such as high sensitivity, a simple structure, and resistance to electromagnetic interference. However, there are no systematic studies on its key performance, for example, its frequency response and dynamic range. In this paper, a comprehensive study of these two key parameters is carried out using simulation analysis and experimental verification. The upper limit of the frequency response range and the upper limit of the dynamic range influence each other, and they are both affected by the data sampling rate. At a certain data sampling rate, the higher the upper limit of the frequency response range is the lower the upper limit of the dynamic range. The quantitative relationship between them is revealed. In addition, these two key parameters also are affected by the quadrature phase deviation. The quadrature phase deviation should not exceed 0.25π under the condition that the demodulated signal intensity is not attenuated by more than 3 dB. Subsequently, a short-step quadrature Fabry–Perot cavity method is proposed, which can suppress the quadrature phase deviation of the quadrature fiber optic Fabry–Perot cavity microphone based on the differential cross multiplication algorithm.
New Vulnerabilities for Migrants and Refugees in State Responses to the Global Pandemic, COVID-19
Authors: Tazreiter Claudia , Metcalfe Simon
Published: September 2021

This article examines the global pandemic, COVID-19, through the lens of responses to vulnerable migrants, asking what state responses mean for the future of human rights values and for humanitarian interventions. The responses of the Australian state are developed as a case study of actions and policies directed at refugees and temporary migrant workers through the COVID-19 pandemic. The theoretical framing of the article draws on racial capitalism to argue that the developments manifest during the ‘crisis times’ of COVID-19 are in large part a continuity of the exclusionary politics of bordering practices at the heart of neoliberal capitalism. The article proposes that a rethinking of foundational theoretical and methodological approaches in the social sciences are needed to reflect contemporary changes in justice claims, claims that increasingly recognize the multi-species nature of existential threats to all life.
O narcisismo na perspectiva de Otto Kernberg
Authors:   , Pelisson Maize Carla Costa
Published: September 2021

Otto Kernberg é um psiquiatra e psicanalista contemporâneo que se interessou pelo tratamento de pessoas com personalidades severamente perturbadas, sobretudo pacientes borderlines e narcisistas. Ele propôs hipóteses específicas sobre o narcisismo e inovações técnicas para o tratamento das patologias narcisistas. Apesar da importância de suas contribuições, Otto Kernberg é um autor ainda pouco estudado. O presente trabalho se propõe a investigar, de forma sistemática, as hipóteses acerca do narcisismo, elaboradas pelo autor, além de analisar em que medida ele amplia e aprofunda a concepção psicanalítica freudiana de narcisismo e das patologias narcísicas. Como suporte teórico, foram analisados os escritos freudianos e os livros e artigos de Kernberg que abordam o narcisismo. Procuramos demonstrar que a perspectiva da neurose e da psicose, adotada pela maior parte das teorias psicanalíticas, é insuficiente para abordar o fenômeno do narcisismo. A análise das características psicológicas dos transtornos de personalidade narcisistas revela que há uma dimensão mais complexa do narcisismo, ligada principalmente a agressividade, que é essencial para a compreensão de tal fenômeno.
CORPOS-MÁSCARAS E A PANDEMIA DE COVID-19: DIÁLOGOS COM OBRAS DE JOHANNA GOODMAN
Authors: Sales Tiago Amaral , Borges Nicole Cristina Machado , Lourenço Keyme Gomes , Estevinho Lucia
Published: September 2021

Em meio a pandemia de covid-19, máscaras assumiram grandes importâncias, povoando estes tempos, percorrendo caminhos que se acoplam a nossos corpos e cotidianos. Em matilha, decidimos cartografar afetos possíveis por meio destes objetos em diálogo com obras da artista estadunidense Johanna Goodman. Para a escrita, nos colocamos coletivamente à escuta das vidas que habitam as máscaras, de seus corpos e movimentos que se fundem aos nossos, compondo nos trajetos-vida-pandemia, o desconhecido e, os medos e, os encontros outros e... (im)possíveis em territórios pandêmicos.
DA CARNE PARA FORA E DA CARNE PARA DENTRO
Authors: Abreu Jacqueline Amadio de
Published: September 2021

O ensaio visual "Da carne para fora e da carne para dentro" aborda o papel da arte como potência desestabilizadora de discuros engessados e criadora de novas narrativas capazes de criar linhas de fuga e produção de subjetividades inventivas. Desse modo, neste ensaio, apresenta-se uma série de pinturas que emergiu da pesquisa que cruza arte, feminismos e filosofia.
DA ESCOLA COMO OBRA DE ARTE ÀS IMAGENS DE ESCOLAS REMOTAS EM TELAS FRIAS DIGITAIS
Authors: Gonçalves Camilla Borini Vazzoler , Reis Eliana Aparecida de Jesus , Delboni Tânia Mara Zanotti Guerra Frizzera
Published: September 2021

Objetiva entrar em relação com os enunciados discursivos veiculados em diferentes sites, blogs e canais no You Tube, problematizando os modos em que somos afetados por uma imagem de escola que precisa deter o saber e por uma imagem de criança concebida/compreendida como um depósito “vazio” que necessita ser preenchida por informações e dados superfaturados de saber. Metodologicamente, embarcamos em um movimento cartográfico para, no encontro com diferentes sites, analisar enunciados que invadiram as telas frias digitais em tempos de pandemia e adentraram casas de professores e estudantes. Conversando com Deleuze, Guattari, Foucault e Rolnik para “conspirar” conosco essa escrita, no desejo de continuar apostando na criação/invenção de micropolíticas ativas que abrem poros de respiração em meio à sensação de “eu não consigo respirar”.
INDIKATOR KINERJA DAN MANAJEMEN BIDANG LINGKUNGAN DALAM KONSEP MAQASHID SYARIAH
Authors: Saiful Muchlis
Published: September 2021

Penelitian ini bertujuan untuk memahami enam konsep maqashid syariah dalam pendekatan indikator kinerja dan manajemen di bidang lingkungan. Data penelitian dikumpulkan melalui referensi dari Alqur’an, jurnal, artikel, dan buku yang terkait dengan Maqashid Syariah, dan Global Reporting Initiative (GRI). Hasil penelitian menunjukkan operasionalisasi menjaga agama adalah aspek zakat, infak, dan sedekah, operasionalisasi menjaga jiwa menekankan pada aspek kesehatan, operasionalisasi menjaga akal yaitu aspek pendidikan, operasionalisasi menjaga keturunan berkaitan aspek kehidupan sosial kemasyarakatan, operasionalisasi menjaga harta menekankan aspek ekonomi, dan perasionalisasi menjaga lingkungan tertuju pada aspek flora dan fauna.

 

Abstract

This study aims to understand the six maqashid sharia concepts in the approach to performance indicators and management in the environmental field. Research data was collected through references from the Qur'an, journals, articles, and books related to Maqashid Syariah, and the Global Reporting Initiative (GRI). The results of the study show that the operationalization of protecting religion is the aspect of zakat, infaq, and alms, the operationalization of protecting the soul emphasizes the health aspect, the operationalization of protecting the mind, namely the educational aspect, the operationalization of protecting offspring related to aspects of social life, the operationalization of protecting assets emphasizing the economic aspect, and rationalizing protecting the environment. focused on the aspects of flora and fauna.
KIỂM TRA ĐỘ BỀN TRỤC KHUỶU ĐỘNG CƠ MỘT XY LANH BẰNG PHƯƠNG PHÁP MÔ PHỎNG
Authors: Tuấn Nguyễn Thanh , Thái Huỳnh Lê Hồng
Published: September 2021

Mục tiêu của nghiên cứu là kiểm tra độ bền của trục khuỷu động cơ một xy lanh bằng phương pháp mô phỏng. Đối tượng sử dụng trong nghiên cứu này là trục khuỷu của động cơ của xe gắn máy Honda Blade. Quá trình mô phỏng được thực hiện trong điều kiện trục khuỷu làm việc và chịu tác động của các tải trọng lớn nhất. Các tải trọng này được tính toán từ lý thuyết ứng với các chế độ làm việc của trục khuỷu và chúng được sử dụng cho quá trình mô phỏng. Kết quả mô phỏng cho thấy rằng trục khuỷu đảm bảo độ bền trong các điều làm việc ứng với tải trọng lớn nhất. Mô phỏng này cũng là cơ sở cho các nghiên cứu tiếp theo nhằm tính toán và thiết kế chế tạo trục khuỷu đáp ứng được yêu cầu và điều kiện làm việc của từng loại động cơ khác nhau trong thực tế. Nghiên cứu này góp phần làm giảm thời gian và chi phí trong thiết kế và thử nghiệm độ bền của trục khuỷu.
NGHIÊN CỨU THIẾT KẾ HỆ THỐNG PHÂN LOẠI SẢN PHẨM THEO MÀU SẮC ỨNG DỤNG CÔNG NGHỆ XỬ LÝ ẢNH SỐ
Authors: Việt Hồ Mậu , Hiệp Lê Hoàng , Phượng Mạc Thị
Published: September 2021

Bài báo trình bày quá trình thiết kế hệ thống phân loại sản phẩm theo đặc trưng màu sắc của sản phẩm sử dụng công nghệ xử lý ảnh có độ chính xác cao. Hệ thống có thể nhận diện được tối đa 58 màu sắc khác nhau với nhiều ưu điểm hơn so với các hệ thống phân loại sử dụng cảm biến số lượng màu sắc còn nhiều hạn chế trên thực tế. Hệ thống phân loại sản phẩm sử dụng công cụ xử lý ảnh trên nền LabView để phân loại các sản phẩm ra từng loại khác nhau và tích hợp thêm chức năng giám sát và điều khiển từ xa mang lại hiệu quả kinh tế cao cho hệ thống. Trong phạm vi bài báo, nhóm tác giả ứng dụng thuật toán nhận diện màu sắc ảnh thu được từ camera, sau đó thực hiện xử lý trên 3 loại màu phổ biến là màu đỏ, vàng, xanh. Kết quả thực nghiệm được tiến hành trong bốn trường hợp cụ thể. Số liệu cho thấy, hệ thống hoạt động ổn định, độ chính xác cao: với sản phẩm màu đỏ độ chính xác 100%; sản phẩm màu vàng có độ chính xác 98% và sản phẩm màu xanh có độ chính xác 96%.
INFLUENCE OF NUTRITION IN THE INFANT PERIOD ON OVERWEIGHT AND OBESITY OF CHILDREN AGED 24 TO 60 MONTHS IN SOME NORTHERN PROVINCES OF VIETNAM: A CASE-CONTROL STUDY
Authors: Dung Lê Thị Thùy , Valerievna Savvina Nadezhda , Nicolaievna Afanasieva Aleksandra , Khánh Đỗ Nam , Tuyết Lê Thị
Published: September 2021

Mục tiêu của nghiên cứu là đánh giá ảnh hưởng của chế độ dinh dưỡng giai đoạn bú mẹ đến tình trạng thừa cân, béo phì ở trẻ mầm non. Nghiên cứu được thực hiện trên 126 trẻ béo phì và thừa cân độ tuổi 24 - 60 tháng tuổi và 306 trẻ bình thường thuộc nhóm chứng (theo tiêu chí WHO 2006). Phân tích thống kê đơn biến và đa biến về đặc điểm dinh dưỡng trong thời kỳ trẻ sơ sinh tác động lên thừa cân béo phì ở trẻ mầm non không có ý nghĩa thống kê bao gồm: đặc điểm bú mẹ hoàn toàn (p = 0,24), bổ sung sữa công thức trong 6 tháng đầu (p = 0,992), thời điểm cai sữa (trước 12 tháng: p = 0,81, sau 24 tháng: p = 0,97), tuổi bắt đầu ăn dặm (trước 4 tháng: p = 0,25, sau 6 tháng: p = 0,78). Ở giai đoạn trẻ bú mẹ có biểu hiện thích ăn dặm làm tăng nguy cơ bị thừa cân béo phì khi trẻ 24 – 60 tháng với OR = 2,08 (phân tích đơn biến) và OR = 2,12 (phân tích đa biến) (p = 0,004). Như vậy, ở giai đoạn bú mẹ, đặc điểm bú mẹ hoàn toàn hoặc ăn bổ sung sữa công thức trong 6 tháng đầu, tuổi bắt đầu ăn dặm, thời điểm cai sữa không ảnh hưởng đến tình trạng thừa cân béo phì ở trẻ mầm non. Trẻ bú mẹ háu ăn có nguy cơ bị thừa cân và béo phì khi trẻ 24 đến 60 tháng.
HIỆN TRẠNG SẢN XUẤT VÀ XỬ LÝ CHẤT THẢI TRONG CHĂN NUÔI GÀ TẠI HUYỆN PHÚ BÌNH, TỈNH THÁI NGUYÊN
Authors: Hương Hoàng Thị Thanh , Tuân Hà Minh , Việt Dương Hồng , Sơn Bùi Ngọc , Đăng Trần Hải , Hương Phạm Thị , Hùng Liêu Thanh
Published: September 2021

Hoạt động chăn nuôi gà của huyện Phú Bình liên tục phát triển mạnh trong những năm gần đây dẫn tới lo ngại về ô nhiễm môi trường. Nghiên cứu này được triển khai nhằm đánh giá thực trạng chăn nuôi và xử lý chất thải chăn nuôi gà tại địa phương. Nghiên cứu được triển khai trong tháng 10/2020 thông qua phỏng vấn trực tiếp cá nhân đối với 90 hộ dân tại hai xã Tân Khánh và Bàn Đạt. Kết quả nghiên cứu cho thấy, quy mô chăn nuôi gà của các hộ là quy mô nhỏ, khoảng 1.900 con/hộ và chuồng trại chăn nuôi chủ yếu nằm trong khu dân cư. Đa số các hộ có áp dụng biện pháp xử lý chất thải chăn nuôi gà nhưng hiệu quả chưa cao, gây ô nhiễm môi trường và có nguy cơ ảnh hưởng xấu tới sức khỏe người dân. Có 40,7% hộ dân được tập huấn biện pháp xử lý môi trường chăn nuôi. Tuy nhiên, kênh học hỏi thông qua hàng xóm chiếm tới 32,1%, trong khi tỉ lệ học hỏi qua nhóm sản xuất, hợp tác xã và mô hình trình diễn là rất nhỏ. Kết quả nghiên cứu sẽ là căn cứ hữu ích để các cơ quan liên quan và người chăn nuôi có hành động phù hợp nhằm bảo vệ môi trường, sức khỏe của người chăn nuôi và vật nuôi tại địa phương.
ĐÁNH GIÁ KHẢ NĂNG THÍCH ỨNG CỦA CÂY HOM KIM ANH (ROSA LAEVIGATA MICHX.) VỚI ĐIỀU KIỆN KHÍ HẬU, THỔ NHƯỠNG TẠI THÁI NGUYÊN
Authors: Hằng Phó Thị Thúy , Cúc Hoàng Thị , Anh Trần Thị Quỳnh
Published: September 2021

Kim anh (Rosa laevigata Michx.) là cây bản địa mọc hoang tại phía Nam Trung Quốc, sau đó chúng di cư sang một số tỉnh của Việt Nam, Lào. Hiện nay, ở Việt Nam khu vực phân bố tự nhiên của cây Kim anh chỉ có ở một số huyện của tỉnh Cao Bằng và Lạng Sơn, khu vực giáp ranh với Trung Quốc. Năm 2017, với mong muốn trồng cây Kim anh trong tương lai tại khu vực Thái Nguyên, nghiên cứu giâm hom cây Kim anh đã thành công với cành cho hom được thu hái từ cây Kim anh bản địa (tại huyện Trùng Khánh - Cao Bằng). Tuy nhiên, cần phải tiếp tục đánh giá sự thích ứng của cây hom Kim Anh với thời tiết, khí hậu, thổ nhưỡng của tỉnh Thái Nguyên. Do đó, nghiên cứu này được tiến hành nhằm xác định khả năng sinh trưởng, phát triển; sự ra hoa; sự tạo quả của cây. Bằng phương pháp thực nghiệm trên thực địa đã thu được kết quả sau: Cây hom Kim anh sinh trưởng, phát triển rất tốt: cây khỏe, dài, mập, không bị sâu bệnh, khả năng phát sinh chồi mầm mới cao. Tuy nhiên, cây hom Kim anh được trồng thực địa tại Thái Nguyên không có khả năng ra hoa, kết quả như cây hom Kim anh trồng tại Trùng Khánh - Cao Bằng. Nguyên nhân của hiện tượng này bước đầu được xác định là do khí hậu (nhiệt độ) tại Thái Nguyên trong thời kỳ ra hoa không phù hợp cho sự ra hoa của cây Kim anh.
TỐI ƯU HÓA ĐIỀU KIỆN LÊN MEN ACID LACTIC TỪ NƯỚC CHUA TÀU HỦ CỦA VI KHUẨN LACTIC ỨNG DỤNG TRONG THỬ NGHIỆM SẢN XUẤT XÀ PHÒNG KHÁNG KHUẨN Propionibacterium acnes PO
Authors: Long Bùi Hoàng Đăng , Mai Lý Xuân , Châu Lưu Minh , Thạnh Nguyễn Ngọc , Phong Huỳnh Xuân
Published: September 2021

Nghiên cứu này nhằm tuyển chọn chủng vi khuẩn lactic có khả năng lên men acid lactic và kháng khuẩn Propionibacterium acnes PO nhằm thử nghiệm sản xuất xà phòng từ nước chua tàu hủ lên men. Điều kiện tối ưu cho quá trình lên men acid lactic bao gồm mật độ giống chủng (105, 106 và 107 tb/mL), hàm lượng đường ban đầu (3; 6 và 9% w/v) và pH (5; 6 và 7) cũng được khảo sát. Đồng thời khảo sát hàm lượng nước chua thích hợp (15; 20; 25% w/v) phối chế sản xuất xà phòng khả năng kháng khuẩn P. acnes. Kết quả cho thấy chủng vi khuẩn Lactobacillus plantarum L39 có khả năng lên men acid lactic đạt 7,35 g/L và khả năng kháng khuẩn tốt với khoảng cách kháng khuẩn đạt 16,00 mm. Điều kiện thích hợp cho lên men acid lactic từ nước chua tàu hủ được xác định ở hàm lượng đường 8% (w/v), pH 5,6 và mật độ giống chủng 107 tế bào/mL với hàm lượng acid lactic đạt 10,275 g/L. Xà phòng được thử nghiệm sản xuất từ nước chua lên men cho thấy, thể tích nước chua bổ sung đạt 20% (w/w) tạo ra xà phòng có khả năng kháng vi khuẩn P. acnes PO với đường kính vòng kháng đạt 15,67 mm và có kết quả cảm quan với 86,6% điểm kết cấu, 86,6% điểm màu sắc và 93,4% điểm mùi hương.
ẢNH HƯỞNG CỦA CÁC YẾU TỐ KHÍ TƯỢNG LÊN BỆNH ĐẠO ÔN TRÊN LÚA Ở TỈNH HẬU GIANG
Authors: Hồng Nguyễn Văn , Thơ Phan Thị Anh
Published: September 2021

Bệnh đạo ôn hại lúa do nấm Pyricularia oryzae gây ra, là một trong những bệnh làm tổn thất năng suất lúa nặng nề nhất, nấm đạo ôn có thể tấn công cây lúa ở tất cả các giai đoạn của cây trên lá, đốt thân và bông. Mục đích của nghiên cứu này nhằm đánh giá mối tương quan của các yếu tố khí tượng lên bệnh đạo ôn trên lúa, từ đó xây dựng mô hình dự đoán bệnh để hạn chế thấp nhất sự mất mùa ở tỉnh Hậu Giang. Phương pháp thu thập số liệu sản xuất nông nghiệp thứ cấp từ Sở Nông nghiệp và Phát triển nông thôn tỉnh Hậu Giang từ tháng 01 năm 2017 đến tháng 12 năm 2019. Các yếu tố khí tượng gồm nhiệt độ cao nhất, nhiệt độ trung bình, nhiệt độ thấp nhất, độ ẩm cao nhất, độ ẩm trung bình, độ ẩm thấp nhất, lượng mưa và số giờ nắng có sự ảnh hưởng lên tỷ lệ diện tích lúa bị nhiễm bệnh đạo ôn với hệ số tương quan dao động trong khoảng 0,10 - 0,55. Đồng thời, yếu tố độ ẩm trung bình đóng vai trò quan trọng nhất cho việc dự đoán sự xuất hiện của bệnh này. Do đó, yếu tố khí tượng độ ẩm trung bình cần được ưu tiên xem xét trong quản lý bệnh đạo ôn trên lúa.