Movement Of Center Research Articles

THE EMERGENCE AND DEVELOPMENT OF THE RADICAL ISLAMIST MOVEMENT IN CENTRAL ASIA: CAUSES, INTERNAL AND EXTERNAL FACTORS OF FEEDING

THE EMERGENCE AND DEVELOPMENT OF THE RADICAL ISLAMIST MOVEMENT IN CENTRAL ASIA: CAUSES, INTERNAL AND EXTERNAL FACTORS OF FEEDING

ДОСЛІДЖЕННЯ ТЕХНІЧНИХ ПАРАМЕТРІВ СТАНУ ВЕЛИКОГАБА-РИТНИХ ОБЕРТОВИХ АГРЕГАТІВ

Goal of the article is to develop a mathematical model of the movement of the cross-section center of the elliptical casing in the supporting elliptical bandage to increase the straightness of the geometric axis of the rotary furnace body at the support point, which depends on the sizes of the elliptical casing and bandage, their mutual location on the support, as well as the axes orientation of the ellipses of the cross-section casing relative to each other on different supports. Significance. The high-quality installation of the rotary furnace casing is determined by the straightness of its geometric axis, and not only at the time of control, but also during the mechanism operation. It is obvious that if this condition is observed, optimal operating conditions of the mechanism, its reliability and durability can be achieved. However, the measurement results and installation accuracy are affected by such a property of the measurement object as the deviation of the body shape from the circular cylindrical one, especially in the places of support. The new sub-bandages casing for installation have smaller deviations from the round-cylindrical shape than those that were in use. These deviations appear mainly as ellipticity or ovality. Since the new bandage, as a rule, does not have other distortions of the shape, except for ellipticity, to clarify the issue, the displacement of the cross-section center of the elliptical casing in the elliptical bandage should be considered. Method. For the cross-section of a support node with an elliptical bandage and a sub-bandage casing, using the complete elliptic integral of the second kind and its presentation in the form of a hypergeometric series, the center coordinates of the ellipse of the casing cross section in the YOZ coordinate system are determined and a detailed analysis of the factors and parameters of the system affecting its position is provided. Results. The position of the geometric axis of the body at the support point depends on the ellipticity of the sub-bandage casing and the bandage, their mutual location on the support, as well as the axes orientation of the ellipses relative to each other on different supports. Since the position of the geometric axis does not remain unchanged during the rotation of the body, the location of the scattering ellipses centers on one straight line will be optimal. Scientific novelty. Mathematical dependencies have been established to determine the center coordinates of the ellipse of the casing cross section in the YOZ coordinate system, the origin is in the center of the circle with the conventional radius of the ellipse of the rotary furnace cross section. Practical significance. The proposed method of estimation will further increase the straightness of the geometric axis of the rotary furnace, both at the time of control and during the operation of the mechanism.

Влияние возраста на относительный вклад сенсорных систем в контроль вертикальной стойки здорового человека

The influence of the age factor on the contribution of the vestibular, visual, and proprioceptive sensory systems to the function of spatial orientation was assessed using the stabilometry method (ST-150, Mera, Moscow, Russia) during the vertical stance of a healthy person (N = 69, from 20 to 83 years old, of which 42 women and 27 men). Three age groups of subjects were examined: I (young, 20–25 years old, n = 37), II (middle-aged, 44–64 years old, n = 17 people), and III (elderly and old, 65–83 years old, n = 15). The subjects performed the Romberg test (stand with closed eyes) and postural stability (standing on a hard and soft surface) and a combined test (Romberg test + postural stability). This made it possible to compare the stabilometric parameters (the length and speed of the trajectory and the area of movement of the common center of pressure (COP)) under four conditions: 1) standing with eyes open on a stable surface (SS – EO), 2) eyes closed on a stable surface (SS – EC), 3) standing with eyes open on a thick layer of unstable surface (foam) (US – EO), and 4) eyes closed on a thick layer of unstable surface (foam) (US – EC). To calculate the contribution of sensory systems to the function of maintaining balance in a vertical stance, a formula was used. An increase in the length of the COP trajectory with increasing age was revealed. At the same time, only an insignificant change in the relative contribution of sensory systems to the parameters of the stabilogram was noted in middle-aged and older people compared to young people.

МЕТОДИКА ОЦІНКИ ТРИВАЛОСТІ ЖИТТЄВОГО ЦИКЛУ ТРАНСПОРТНОГО ЗАСОБУ

The exploitation of morally and physically outdated vehicles reduces the safety of transportation, adversely affects the environment, and, consequently, human health, leads to the degeneration of the functioning of the transport system of the region, At the same time, the reliability of the logistics system of transportation is primarily determined by the reliability of transport as its element. All equipment over time has the particularity to lose its value and to accumulate maintenance outgoings for proper condition. The business, usually guided by general maintenance recommendations or applied as failure occurs. However, even if the recommendation is followed, at a certain run, the efficiency of the vehicle begins to decrease, which is associated with wear and tear of transport.Transportation costs, including vehicle maintenance, account for more than 40% of the logistics costs. Shortening this article of expenses will allow the timely replacement of the vehicle, that is, the renewal of the fleet of rolling stock.Therefore, updating the fleet of rolling stock is an important task facing both the motor transport industry and the economy of the country as a whole.The article includes the theoretical analysis of methodical approaches to the definition of indicators of the life cycle of the motor transport industry and methods for assessing the status of rolling stock in the motor transport enterprise. It is determined that in order to ensure a high level of volumetric indicators of the life cycle of the motor transport industry it is necessary to manage the life cycles of technologies, services and means of transport from the position of the complex object «Vehicle − transport service». Technological improvements, technological progress, reasonable projected economic changes, the movement of business centers, prohibited laws and other reasons influence the useful life of a vehicle. All this needs to be taken into account before determining the expected useful life of the machine. The criteria for establishing a reasonable repla-cement period for rolling stock of motor transport enterprises are environmentally friendly and safe vehicles.The proposed method of estimating the life cycle of a vehicle on the basis of operational reliability allows for taking into account the majority of functional characteristics and contributes to the acceptance of optimal strategic decisions for the management of the motor transport enterprise

A Robust Calibration and Adaptive Multipair of Magnetic Gradient Tensors Localization Method for Magnetic Anomaly Detection

The performance of magnetic anomaly detection (MAD) with magnetic gradient tensor (MGT) measurement system is severely limited by both the measurement errors and accuracy of localization algorithm. However, the robust calibration and localization method against various interferences and noises has not received the deserved attention. This study proposes a joint calibration and localization method with MGT to improve the accuracy of non-cooperative target (NCT) detection with environmental magnetic interferences and noise. First, compared to the previous calibration method requiring a uniform magnetic field environment and precise triaxial nonmagnetic turntable, a new calibration method based on multi-invariant constraints is studied, which is insensitive to the magnetic interferences and movement of array center during the calibration. Then, an adaptive multi-pair of MGTs localization (AMML) method is proposed for the MAD of NCT. On one hand, the corresponding multi-pair of MGTs are chosen adaptively depending on the condition number of MGT, which is far more robust against varying movement directions of NCT compared to previous methods. On the other hand, the AMML method is optimized with the Levenberg–Marquardt (LM) algorithm guided by the prior information of analytical scalar triangulation and ranging (STAR) method, which enhances the efficiency and accuracy of localization method significantly. The experimental results demonstrate that the AMML method reduces the localization error by 39%, 54.3%, and 55.4% compared to the new STAR method (NSM), Lv-STAR method (LSM) and conventional STAR method, respectively.

Tellurium-induced defect engineering for boosting the oxygen evolution reaction of spinel oxide.

Here, we report the successful synthesis of spinel oxides XTe-NiCo2O4 (X = 0, 2%, 4%, 6%) with different amounts of heteroatom Te doped in. Among them, 4%Te-NiCo2O4 exhibits the best catalytic activity. Experimental results show that the incorporation of metalloid Te atoms into NiCo2O4 facilitates the change of the electronic structure accompanied by the movement of the d-band center and produces more oxygen defects, which is beneficial for the improved OER activity of NiCo2O4.

In sight, in mind: Spatial proximity to protest sites and changes in peoples' political attitudes

Occupying public spaces can be an effective tactic for conveying a semantic message of protest and gaining wider support; however, it may also severely disrupt the everyday lives of non-participants and causes a backfire. Therefore, it remains unclear whether and how the occupy movements have shifted political attitudes among the general public. Bringing a social-spatial perspective to the case of the Occupy Central Movement (OCM) in Hong Kong, this study investigates how the attitudinal impact of occupation has varied according to people's spatial proximity to the protest sites. Using two waves of individual-level panel data collected right before and after the OCM and detailed geo-information on the respondents' home addresses and the occupied areas, we apply a difference-in-differences (DIDs) design to identify the causal link between space and attitudes. In addition, propensity score matching (PSM) methods are used to ensure the comparability of nearby and faraway residents. The results show that after the OCM, residents living near the occupied areas not only maintained their support for the pro-democracy camp but also became more liberal as compared to faraway residents. This phenomenon can be explained by the "on-site" effect, which suggests that the direct exposure to protestors' solidarity and the repressive actions of authorities arouse bystanders' sympathy for the protestors and support for their political cause. Such influence appears to be long-lasting and can be evidenced by the local election results after the protest.

THE HEAVY SNOWFALL IN THE LVIV REGION

The relevance of determining the type of circulation and thermodynamic conditions of heavy snowfall in the Lviv region is due to the significant complication of meteorological conditions for aircraft flight due to heavy snowfall. Revealed the significant annual snowfall in the Lviv region from 2011 to 2021 at each station of the region with an increase in the number of cases towards the Carpathian Mountains. Established that heavy snowfall was observed at the stations of the Lviv region once every 3-5 years, with an increase in the number of cases after 2016, and the maximum of the annual flow occurred in February and December. Determined that heavy snowfalls were mainly formed under the influence of the occluded front during the movement or formation of the cyclone center over the northwest of Ukraine within the cold high-altitude baric basin at the level of 500 hPa during the north-west transport of air masses at altitudes from 750 to 3000 m.

The change in temporal trend and spatial distribution of CO2 emissions of China's public and commercial buildings

The CO2 emission mitigation of the commercial and public building sector (P&C) is critical for achieving China's carbon peak and carbon neutrality. Analyzing changes in CO2 emissions and their driving factors from temporal and spatial perspective provides insights for developing equitable and effective decarbonization strategies. This study investigated the change in temporal trend and spatial distribution of CO2 emissions of China's P&C during period of 2005–2018 according to the Kaya identify and Gravity Center model. Meanwhile, combined with the Logarithmic Mean Divisia Index, this study proposed a decomposed method to identify the driving factor of the movement of the gravity center. The results showed that: 1) in the temporal dimension, China's P&C has still not achieved its CO2 emissions peak, arriving 820.68 MtCO2. The most positive and negative driving factors were per capita add value of tertiary industry and energy efficiency, respectively; 2) in the spatial dimension, during the 13th Five Year Plan period, the gravity center moved southwestward, and the most positive and negative driving factors were energy consumption unit area and energy efficiency, respectively; Besides, to accelerate the decarbonization of China's P&C, this study reviewed the main decarbonization strategies, divided them into six categories and provided policy implications. In summary, this study provides a completed assessment on CO2 emission changes of China's P&C, facilitating policy-makers to develop more reasonable implementation plans for emission mitigation.

TRAVEL GROWTH ANALYSIS OF ACTIVITY SYSTEMS FOR THE NEED FOR A MASS TRANSPORT SYSTEM IN SERANG CENTER

Serang City is preparing for the development of infrastructure and road network, so that every area in Serang City can be well integrated. Serang City has 6 sub-districts, including the center of national activities and is a big city because it has a population of around 652,192 people (BPS, 2019). By knowing the growth of the LHRT, the generation and attraction models of movement in the city center, based on the direction of the zone under review, namely north, west, east and south in the internal zone of Serang City and the external zone around Serang City. With the multiple regression analysis method on the generation and attraction models of movement which are analyzed based on socio, economic and demographic variables with dominant factors. The independent variables measured were population (X1), number of health facilities (X2), number of schools (X3), number of workers (X4), GRDP (X5) and the dependent variable is the amount of daily average annual traffic (Y). The results of the equations of motion obtained are 4 generation equations, 4 pull equations and the value of the determinant of each equation.

ОПРЕДЕЛЕНИЕ ПОПЕРЕЧНЫХ СИЛ, ДЕЙСТВУЮЩИХ НА КОЛЕСА ТРАНСПОРТНОЙ РОБОТИЗИРОВАННОЙ СИСТЕМЫ

A method for calculating the wheels lateral forces is proposed to analyze ways to increase the speed of the robotic system without wheel slippage appearance, The analysis of lateral forces allows to synthesize a rational algorithm for distributing the load between drives. In addition, it is proposed to use a vector space to represent kinematic energy, which simplify simulation of the instant center of rotation movements and simplify control system development. The first part of the article is devoted to finding the relationship between the summary lateral force and the drives traction forces; the changing the distance to the instant center of rotation; the lateral movement of the instant center of rotation and the current speed of the entire system. The listed relationships are found through kinematic constraints and the energy conservation law. The second part is devoted to the evaluation of the lateral force acting on each wheel. Thus, the value of the reduced reaction force and the quasi-static model of an elastic wheel are used. Examples of using the proposed method are shown: a comparison of the maximum possible speeds of motion without slippage for different distribution of moments between drives and for different arrangement of drive wheels in the system is carried out.

ОПРЕДЕЛЕНИЕ ПОПЕРЕЧНЫХ СИЛ, ДЕЙСТВУЮЩИХ НА КОЛЕСА ТРАНСПОРТНОЙ РОБОТИЗИРОВАННОЙ СИСТЕМЫ

A method for calculating the wheels lateral forces is proposed to analyze ways to increase the speed of the robotic system without wheel slippage appearance, The analysis of lateral forces allows to synthesize a rational algorithm for distributing the load between drives. In addition, it is proposed to use a vector space to represent kinematic energy, which simplify simulation of the instant center of rotation movements and simplify control system development. The first part of the article is devoted to finding the relationship between the summary lateral force and the drives traction forces; the changing the distance to the instant center of rotation; the lateral movement of the instant center of rotation and the current speed of the entire system. The listed relationships are found through kinematic constraints and the energy conservation law. The second part is devoted to the evaluation of the lateral force acting on each wheel. Thus, the value of the reduced reaction force and the quasi-static model of an elastic wheel are used. Examples of using the proposed method are shown: a comparison of the maximum possible speeds of motion without slippage for different distribution of moments between drives and for different arrangement of drive wheels in the system is carried out.

Detailed Correlation between Central Incisor Movement and Alveolar Bone Resorption in Adults with Orthodontic Premolar Extraction Treatment: A Retrospective Cohort CBCT Study.

This study aims to explore the detailed correlation between the movement of maxillary and mandibular central incisors and alveolar bone resorption in adults who had orthodontic premolar extraction treatment. A total of 63 adult patients (mean age, 24.41 years) who received orthodontic treatment with the extraction of four first premolars were included in this study. CBCT images were obtained before and after treatment. Three-dimensional evaluations of the movement of 252 central incisors (126 maxillary and 126 mandibular incisors) and alveolar bone changes were conducted. Four points were used to describe the incisor movement: C (cusp point), R (root apex point), M (mid-point of root neck), and L (labial cementoenamel junction point). The thickness of labial and palatal alveolar bone was assessed at the crestal, mid-root, and apical levels of incisors. The results were analyzed with Spearman's correlation and multilinear regression. Matching the measurements of central incisor movement and alveolar bone resorption, significant correlations could be observed. For maxillary central incisors, the labial alveolar bone resorption at the crestal level was correlated with the movement of Point L (r = 0.290, p < 0.05), and the labial alveolar bone resorption at the apical level was correlated with Point M (r = 0.387, p < 0.05). For mandibular central incisors, the labial alveolar bone resorption at the apical level was correlated with the movement of Point M (r = 0.493, p < 0.05) and R (r = 0.498, p < 0.01); the palatal alveolar bone resorption at the mid-root level with Point M (r = -0.170, p < 0.01); and the palatal alveolar bone resorption at the apical level with Point R (r = 0.177, p < 0.01). This study investigated the concrete correlations between central incisor movement and alveolar bone resorption in adults after orthodontic treatment with premolar extraction. It is potentially helpful for orthodontists to have a relatively accurate prediction of alveolar bone resorption based on the specific movements of central incisors and to reduce the risk of alveolar bone resorption by better adjusting the three-dimensional movement types of incisors.

Extremisation of Hamiltonian of Eight DoF Rotor System

The orbital path (spatial coordinates) variation of a rotor dynamic system under the influence of gyroscopic couple is not a trivial problem to predict. This comprises of computations to obtain the movement of the mass centre of the rotor to the whirling orbit radius with imposed gyroscopic moment under the principle of least action which necessarily estimates the Lagrangian of the rotor system at a given instant of time and thereby arriving at the Hamiltonian. This approach, unlike the usual Newton’s laws of motions procedure, is not very common. The orbital path of the rotor is obtained for an 8 degree of freedom (DoF) rotor system, satisfying the Hamiltonian principle of least action (extremisation) using Monte-Carlo simulation. The centre of the whirling orbit of a rotor system which is the geometric center of a rotor system under the influence of gyroscopic moment is the path of least distance not the path of least time, hence the rotor center moves in a straight line to reach the whirling radius of the orbital path.

European Press – Press Organ of the Central European Federal Youth Movement and the Central European Federalists

European Press was a periodical coming out in the years 1951–1980, published by the Central European Federal Youth Movement (since 1959 the Central European Federalists). It was an organisation of federalists-emigrants from Central European countries who considered it necessary to establish a Central European federation. Such a federation was supposed to be a way to improve the development of Central European countries and also a method to free them from the yoke of communists. European Press was a press organ which propagated this idea. The information contained in the journal remains valid today, especially in relation to the ideological layer of European integration and its political and social foundations.

A novel method for cage whirl motion capture of high-precision bearing inspired by U-Net

To solve the problem of cage whirl motion capture and evaluation, this paper developed an efficient non-contact measurement method based on semantic segmentation technology. An encoder–decoder network whose backbone is U-Net is constructed by introducing residual learning and attention mechanism for cage motion state segmentation. A random move augmentation strategy is used to simulate the random movement of cage mass center. The network is trained with 1368 high-speed cage rotational images using the augmentation strategy. Additionally, 150 images are validation set, and 5000 images under different operating conditions are test set. A trained network is applied to the cage whirl motion capture under different operating conditions by matching the suitable parameters during the training phase. The results show that our method effectively predicts the trend of cage whirl motion, with the predicted cage whirl orbit used for the accurate analysis of cage rotational stability.

무게 중심 알고리즘(Barycenter Algorithm)을 활용한 무성 영화 분기 검출 - 지가 베르토프의 [카메라를 든 사나이]를 중심으로

In today's media environment, there is an increasing demand for a method capable of technically analyzing moving images. In the field of film, which contains vast amounts of data, an efficient method and structure for analyzing moving image information is indispensable. This study presents short segmentation and film analysis methods and results, focusing on sequences through Barycenter algorithms and machine learning methodologies, in Dziga Vertov's "Man with a Movie Camera," a director representing the silent film era. The existing proposed machine learning methodology simultaneously utilizes the Barycenter algorithm method in short segmentation due to its limited accuracy, although the time required for short segmentation is short. The Barycenter algorithm is a method of finding the center of gravity in an image by brightness and saturation; it has high short segmentation accuracy compared to the machine learning methodology that relies on center movement. It is proved that the method of using the Barycenter algorithm presented in this study is more accurate than the existing method. This study aims to contribute as a criticism tool based on quantitative indicators of film as well as to improve our understanding and characterizations of films.

Changes in the spatial and temporal characteristics of China’s arid region in the background of ENSO

Arid regions are sensitive to changes in precipitation, while El Niño-Southern Oscillation strongly influences worldwide hydrometeorological processes. Temporal and spatial changes of characteristics including precipitation, annual mean temperature and area in China's arid region were analyzed, using daily precipitation and temperature data from 117 meteorological stations of 1961–2016. The results show that: (1) The arid region is getting warmer and wetter. During the past 56 years, the precipitation in the arid region have shown an increasing trend. The annual and quarterly precipitation all exist a cycle of about 4 years. There is a negative correlation between the area of the arid region and the annual mean temperature, which is significant at the 0.01 level. (2) The area of arid region has been on a downward trend since 1968, and there was a mutation in 1992. There are three main cycles of 24 years, 13 years and 5 years in the area of the arid region. During the study period, the spatial center of the arid region’s precipitation moved 0.14° to the north and 0.77° to the east. (3) The response of precipitation to ENSO is different between the eastern and the western arid region. El Niño events increased the area of China’s arid region in El Niño years and La Niña events increased the precipitation of China’s arid region in La Niña years. The response of China’s arid region to ENSO in the first half of the following year is opposite and the response in spring is the most significant. To sum up, in El Niño years the eastern arid region increased in area and precipitation, while in La Niña years the western arid region decreased in area and the eastern arid region increased in precipitation, which was related to the eastward movement of the spatial center of the precipitation.

The impact of Covid-19 restrictions in Ireland on symptom severity in mild to moderate Parkinson's disease.

Introduction:The COVID pandemic and public health restrictions significantly impacted those living with neurological conditions such as Parkinson’s Disease due to the curtailment of therapies. Patients attending a single centre movement disorders clinic reported reduced physical activity and quality of life during the pandemic. This study aimed to assess the impact of pandemic restrictions on Parkinson’s Disease symptom severity in people with mild to moderate Parkinson’s Disease.Method:A cross-sectional study design with a convenience sample of 20 people living with mild to moderate Parkinson’s Disease was adopted. A telephone survey questionnaire was completed to measure changes in symptom severity on the 14 most common Parkinson’s Disease symptoms. Data were analysed using descriptive statistics.Results:Nineteen participants completed the survey. Participants frequently reported a decline in nine symptoms of Parkinson’s Disease; bradykinesia, rigidity, walking, sleep, mood, memory, quality of life and fatigue. Nil changes in freezing were reported. No change was reported in the nonmotor symptoms of constipation, speech and pain in 75, 65 and 95% of participants, respectively.Conclusion:Findings of this study acknowledge the negative impact of restrictions on the motor and nonmotor symptoms of Parkinson’s Disease. Flexibility to access and delivery of service should be considered to mitigate any future potential restrictions.

Review: Art for the Future: Artists Call and Central American Solidarities, edited by Erina Duganne and Abigail Satinsky

Review: <i>Art for the Future: Artists Call and Central American Solidarities</i>, edited by Erina Duganne and Abigail Satinsky