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Children ◽  
2021 ◽  
Vol 8 (12) ◽  
pp. 1113
Author(s):  
Wojciech Kiebzak ◽  
Arkadiusz Żurawski ◽  
Stanisław Głuszek ◽  
Michał Kosztołowicz ◽  
Wioletta Adamus Białek

Background: Due to the decrease in the percentage of perinatal mortality, which is one of the Millennium Development Goals, the number of children with a central coordination disorder (CCD) has increased, present in up to 40% of premature babies. Neurodevelopmental disorders detected in the diagnostic process require early interventions that will eliminate or overcome existing dysfunctions. These treatments often cause discomfort in the infant, which induces insecurity and activation of basic defense mechanisms. The aim of the work is to assess changes in cortisol concentration in infants treated with the Vojta method. Methods and findings: The study included 35 children with CCD aged between three and nine months. The participants had no comorbidities that could have affected the obtained results. The activities were planned to occur in three stages: 1. Collection of a saliva sample directly before the physiotherapy appointment. 2. Collection of saliva immediately after rehabilitation. 3. Collection of saliva 20 min after the end of rehabilitation. The physiotherapeutic intervention included the assessment of seven reactions of the body position in space according to Vojta and the conduct of a therapeutic session consisting of the first phase of rotation and creeping reflex according to Vojta. The concentration of free cortisol in saliva was assessed with LC-MS/MS. In the first measurement, none of the children presented an excess of the normative concentration of cortisol. The cortisol measurement performed directly after rehabilitation showed above-normative values in three children. In the third measurement, all of the children presented a decreased concentration of free cortisol. The analysis (paired two-tailed t-test, p < 0.05) showed statistically significant differences between particular stages of the measurements. The analysis of the scores obtained in the second measurement showed the concentration of scores in the area of “normal” at a level of 0.83 (normal concentration) and the area “above normal” at the level of 0.005 (very weak concentration). Based on the analysis of significance of the obtained scores, it was found that the result was not accidental, and the Vojta method used in the treatment of children with CCD was suitable. Conclusions: Here, for the first time, we presented how Vojta therapy was correlated with cortisol levels among children with a central coordination disorder.


2021 ◽  
Vol 48 (4) ◽  
pp. 347-351
Author(s):  
Yoo Jin Shim ◽  
Yeon Hee Hong ◽  
Jaewang Lee ◽  
Byung Chul Jee

Objective: We investigated the impact of vitamin D3 (VD3) supplementation during mouse preantral follicle culture in vitro and the mRNA expression of 25-hydroxylase (CYP2R1), 1-alpha-hydroxylase (CYP27B1), and vitamin D receptor (VDR) in mouse ovarian follicles at different stages.Methods: Preantral follicles were retrieved from 39 BDF1 mice (7–8 weeks old) and then cultured in vitro for 12 days under VD3 supplementation (0, 25, and 50 pg/mL). Follicular development and the final oocyte acquisition were assessed. Preantral follicles were retrieved from 15 other BDF1 mice (7–8 weeks old) and cultured without VD3 supplementation. Three stages of mouse ovarian follicles were obtained (preantral, antral, and ruptured follicles). Total RNA was extracted from the pooled cells (from 20 follicles at each stage), and then reverse transcriptase-polymerase chain reaction was performed to identify mRNA for CYP2R1, CYP27B1, and VDR.Results: The survival of preantral follicles, rates of antrum formation and ruptured follicles (per initiated follicle) and the number of total or mature oocytes were all comparable among the three groups. Both CYP2R1 and CYP27B1 were expressed in antral and ruptured follicles, but not in preantral follicles. VDR was expressed in all three follicular stages.Conclusion: VD3 supplementation in vitro (25 or 50 pg/mL) did not enhance mouse follicular development or final oocyte acquisition. Follicular stage-specific expression of CYP2R1, CYP27B1, and VDR was observed.


2021 ◽  
Vol 11 (12) ◽  
pp. 782
Author(s):  
Vilma Zydziunaite ◽  
Lina Kaminskiene ◽  
Vaida Jurgile

Despite the abundance of decades of research into teacher leadership, uncertainty remains due to confusion around the notions of teacher leadership and the unity or at least the authenticity of definitions, and there is a need for a deeper understanding of this leadership process as the teacher works with students in the classroom. The existing definitions and descriptions of teacher leadership do not determine the connection between teacher leadership and student learning, and the subject remains empirically unsubstantiated. The aim of this study was to develop a set of categories of description derived from the teachers’ conceptions of their leadership in the classroom through learning interactions with students. The study was based on the phenomenographic research methodology. Data were collected by conducting semistructured interviews with 37 teachers. A phenomenographic analysis sought a description, analysis, and understanding of experiences with the focus on variation in the conceptions of the phenomenon, as experienced by teachers. Findings revealed that teachers discern their leadership through working with students at school in three stages represented by three categories of description—transferring knowledge, expanding learning capacity, and creating knowledge. All these stages are linked by teacher-student interaction which facilitates successful and meaningful learning for students within the classroom. The connections between the three stages demonstrate the need for teacher–student collaboration, teaching personalization, the professional expertise of the teacher, and learning cocreation. The findings of this study contribute to the expansion of the concept of teacher leadership not only as expert influence through the application of specific teaching methods, but as a coherent process from knowledge transfer to its creation through reciprocal teacher–student learning in the classroom.


Al-Qalam ◽  
2021 ◽  
Vol 27 (2) ◽  
pp. 233
Author(s):  
Sarifa Halija ◽  
Andi Rasdiyanah ◽  
Amrah Kasim ◽  
Andi Marjuni ◽  
Sarifa Suhra

<p>This paper examines the role of the Majelis Taklim Nurul Huda in Strengthening Religious Character and social care in Bone Regency. This type of research is qualitative, located in the Nurul Huda mosque, the largest mosque in Bajoe, the capital of Tanete Riattang Timur District, Bone Regency. The primary data source is obtained from the management of the Assembly Taklim Nurul Huda, secondary data obtained from a variety of relevant posts. Data were collected through interviews and observations as well as document searches, so that the research instruments were in the form of observation guidelines, interview guides, and documentation tools. Data analysis was carried out in three stages, namely data reduction, data exposure, conclusion and verification. The results showed that the role of the Majelis Taklim Nurul Huda in Strengthening Religious Character was seen in the members and the surrounding community having a deep faith, diligent worship, and noble character. Meanwhile, the positive impact of the development of the Majelis Taklim in shaping the character of social care can be seen in the existence of various activities in facilitating social activities.</p>


2021 ◽  
Vol 2021 ◽  
pp. 1-10
Author(s):  
WeiHua Xu ◽  
LiangJin Liu ◽  
JiuXia Zhang

According to the statistical analysis, the incidence of stroke disease has gradually increased, particularly in recent years, which poses a huge threat to the safety of human life. Due to the advancement in science and technology specifically big data and sensors, a new research dome known as data mining technology has been introduced, which has the potential value from the perspective of large amount of data analysis. Information has become a new trend of science and technology, and data mining has been used in various application areas to analyze and predict strokes at home and abroad. In this study, big data technology is utilized to collect potential information and explores clinical pathways of level-3 rehabilitation in certain regions of China. Moreover, application effects of data mining in the rehabilitation of patients with the first ischemic stroke have been evaluated and reported. For this purpose, fifty (50) first-time ischemic stroke patients have been screened through big data and were nonartificially assigned to level-3 clinical pathway and conventional rehabilitation groups, respectively, specifically through software. The first group of patients enters the clinical path of the corresponding level according to the way of three-level referral. These patients were analyzed based on the collected results of completing the unified rehabilitation treatment plan of the three-level rehabilitation medical institution in the patient record form. The second group was selected according to the routine rehabilitation model and method of the medical institution where the patients visited were divided into four stages: before treatment, three weeks after treatment, nine weeks after treatment, and seventeen weeks after treatment. For this purpose, a simplified Fugl-Meyer analysis (FMA), recording of various functions of limb movement, and modified Barthel index (MBI) scale were used to analyze and evaluate the ability of daily activities and compare their effects. The final results showed that FMA and MBI scores of the two groups were improved in the three stages after treatment. The FMA and MBI scores of the clinical pathway group on 3rd and 9th weekends were significantly different from those of the conventional rehabilitation group (which is p < 0.05 ). Moreover, difference in FMA and MBI scores between the two at the 17th weekend was not significant. The total cost of the clinical pathway group, particularly at the ninth weekend, was higher than that of the conventional rehabilitation group, but the cost-benefit ratio was better and the incidence of complications was lower than that of the other group.


2021 ◽  
pp. 014459872110520
Author(s):  
Yabin Gao ◽  
Xin Xiang ◽  
Ziwen Li ◽  
Xiaoya Guo ◽  
Peizhuang Han

Hydraulic slotting has become one of the most common technologies adopted to increase permeability in low permeability in coal field seams. There are many factors affecting the rock breaking effects of water jets, among which the impact force cannot be ignored. To study the influencing effects of contact surface shapes on jet flow patterns and impact force, this study carried out experiments involving water jet impingement planes and boreholes under different pressure conditions. The investigations included numerical simulations under solid boundary based on gas–liquid coupling models and indoor experiments under high-speed camera observations. The results indicated that when the water jets impinged on different contact surfaces, obvious reflection flow occurred, and the axial velocity had changed through three stages during the development process. Moreover, the shapes of the contact surfaces, along with the outlet pressure, were found to have impacts on the angles and velocities of the reflected flow. The relevant empirical formulas were summarized according to this study's simulation results. In addition, the flow patterns and shapes of the contact surfaces were observed to have influencing effects on the impact force. An impact force model was established in this study based on the empirical formula, and the model was verified using both the simulation and experimental results. It was confirmed that the proposed model could provide important references for the optimization of the technical parameters water jet systems, which could provide theoretical support for the further intelligent and efficient transformation of coal mine drilling water jet technology.


2021 ◽  
Vol 2021 ◽  
pp. 1-20
Author(s):  
Abbas Akhbari ◽  
Ali Ghaffari

The Internet of things describes a network of physical things for example, “things” that are connected with the sensors, software, and other technologies to connect and exchange data with other devices and systems via the Internet. In this type of network, the nodes communicate with each other because of the low radio range by step by step with the help of each other until they reach their destination, but there are nodes in the network that do not cooperate with other nodes in the network, which are called “selfish nodes”. In this paper, we try to detect selfish nodes based on a hybrid approach to increase the performance of our network. The proposed method consists of three stages: in the first stage, with the help of the Harris hawk operation, we try to set up the cluster and select head cluster; in the second stage, the sink investigates the existence or nonexistence of selfish nodes in the network by considering the general parameters of the network; and in the event of a selfish node in the network, it informs the head clusters to check the cluster members and recognize the selfish node. In the third stage, with the help of fuzzy logic, the amount of reputation of each of the nodes has been realized, and finally, with the help of fusion of head clusters and fuzzy logic, each node is decided to be cooperate or selfish nodes, and in case of head clusters and fuzzy logic in some cases, the opportunity node will be reestablished to participate in network activities otherwise the node will be isolated. The results show that the accuracy of selfish node detection has increased by an average of 12% and the false positive rate is 8% in comparison to existing methods.


Sensors ◽  
2021 ◽  
Vol 21 (23) ◽  
pp. 7983
Author(s):  
Qingbing Liu ◽  
Jinge Wang ◽  
Hongwei Zheng ◽  
Tie Hu ◽  
Jie Zheng

This paper presents a model for estimating the moisture of loess from an image grayscale value. A series of well-controlled air-dry tests were performed on saturated Malan loess, and the moisture content of the loess sample during the desiccation process was automatically recorded while the soil images were continually captured using a photogrammetric device equipped with a CMOS image sensor. By converting the red, green, and blue (RGB) image into a grayscale one, the relationship between the water content and grayscale value, referred to as the water content–gray value characteristic curve (WGCC), was obtained; the impacts of dry density, particle size distribution, and illuminance on WGCC were investigated. It is shown that the grayscale value increases as the water content decreases; based on the rate of increase of grayscale value, the WGCC can be segmented into three stages: slow-rise, rapid-rise, and asymptotically stable stages. The influences that dry density and particle size distribution have on WGCC are dependent on light reflection and transmission, and this dependence is closely related to soil water types and their relative proportion. Besides, the WGCC for a given soil sample is unique if normalized with illuminance. The mechanism behind the three stages of WGCC is discussed in terms of visible light reflection. A mathematical model was proposed to describe WGCC, and the physical meaning of the model parameters was interpreted. The proposed model is validated independently using another six different types of loess samples and is shown to match well the experimental data. The results of this study can provide a reference for the development of non-contact soil moisture monitoring methods as well as relevant sensors and instruments.


2021 ◽  
Author(s):  
You Cheng ◽  
Liz Chrastil

In the collective navigation scenario of a trio exploring in a foreign city, we propose a theoretical piece, which is a prescriptive guideline describing rational ways that can enable the trio to form a collective cognitive map. The guidelines center around three stages of exploration: the initial gathering of information, coming together to plan a route in the new city, and executing the exploration plan. Depending on the desires and goals of the group, they might explore together for some or all of the time, splitting up only when their individual goals diverge. The guidelines suggest an optimal plan for these different possibilities. We propose that a collective cognitive map is formed and improved during the entire cognitive navigation process as demonstrated by the trio drawing sketch maps, creating place maps, and revising other people’s place maps. However, multiple factors could distort the navigation process at various points in the proposed prescriptive guidelines. These factors include individual differences (e.g., personal navigation ability, navigation anxiety, and sex), group dynamics (e.g., leaders and followers, group strategies), and the impact of the environment (e.g., language, culture, safety, and spatiality). We describe a thought experiment for testing collective navigation, including the measurement of these factors and the corresponding possible distortions in the collective map caused by these factors. Finally, we discuss future research directions, including using virtual environments and commercial applications. By utilizing our model, people can be flexible in resolving conflicting information during goal planning while still navigating efficiently.


2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Mert Öğretmenoğlu ◽  
Orhan Akova ◽  
Sevinç Göktepe

PurposeAwareness of environmental and environmental ethical behaviours are increasing day by day in the hospitality sector. Concepts are examined more and more from the “green” point of view. This study aims to reveal the impact of green transformational leadership on green creativity and the mediating effects of green organizational citizenship behaviours in the relationship between green transformational leadership and green creativity in the context of hospitality.Design/methodology/approachThis study was designed according to the quantitative approach. Hotel employees in Istanbul, Turkey (N = 201) provided data later analysed in three stages. First, JAMOVI software outputs provided descriptive statistics. Second, confirmatory factor analyses ensured the validity of the research. Third, SmartPLS was used to test the hypotheses of the study.FindingsThe results revealed that green transformational leadership positively affects employees' green creativity and green organizational citizenship behaviours. Moreover, green organizational citizenship behaviours partially mediate the relationship between green transformational leadership and green creativity.Originality/valueTo the best of our knowledge, no research examines the mediating effect of green organizational citizenship behaviours in the relationship between green transformational leadership and green creativity. This research will contribute to the relevant literature by filling this gap. This study is original in its attempt to reveal the nature of green organizational behaviours of hospitality employees. It contributes to the literature on green transformational leadership, green creativity and green organizational citizenship behaviours.


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