Main Field Research Articles

Obstetric Anesthesia

Patient safety and reduction of possible complications are the top priorities for anesthesiologists in everyday clinical practice. Thus, interdisciplinary early assessment and optimization of patient specific medical conditions and risk factors are crucial. In obstetrics, regional anesthesia and general anesthesia are routinely being performed. To ensure maternal and fetal safety, knowledge regarding physiological changes during pregnancy is highly important. Regional anesthesia, particularly epidural analgesia, has its main field of application in the context of natural birth in the delivery room. Spinal anesthesia, as well as epidural and combined spinal-epidural anesthesia (CSE) are widely used for caesarean section. In this context, special attention should be paid to possible bleeding disorders. The combination of risk stratification and strategies to improve the patient's preoperative medical status is capable to reduce maternal and fetal complications.

Realistic Mathematics Engineering for improving elementary school students’ mathematical literacy

Mastery of mathematical literacy is essential for developing life skills in the 21st century. Mathematical literacy is even more critical in elementary schools as it forms the basis for mastery at the junior and senior high school levels. Elementary school students differ in their characteristics from students at the higher education level. They, therefore, require an appropriate learning model to improve their mathematical literacy. This research aims to develop a learning model, termed Realistic Mathematics Engineering (RMEng), that combines the Realistic Mathematics Education approach with the steps of the Engineering Design Process and determines the model’s effectiveness. The model was validated by seven experts from three universities in Indonesia and had an Aiken validity index value of 0.786, indicating that it was valid. The RMEng model contains the following steps: understanding realistic problems, solving problems in informal ways, developing formal mathematics, developing products, and drilling. Discussions and presentations can be incorporated into each of these five steps. The RMEng model was subjected to the stages of preliminary and main field testing and was revised based on the suggestions of teachers and observers. Through experimental research compared to a control group, the RMEng model was proven more effective in increasing elementary school students’ mathematical literacy at the 0.000 significance level.

Hybrid Pigeonpea (ICPH 2740) Nodular Activity and Biological Nitrogen Fixation as Influenced by Agronomic Practices

Background: To explore the impact of agronomic practices on nodulation, nitrogenase activity and biological nitrogen fixation in hybrid pigeonpea, a field investigation was under taken at BW5 block ICRISAT development center (IDC), International Crops Research Institute for Semi-Arid Tropics (ICRISAT), Patancheru, Hyderabad, during kharif, 2021 and 2022. Methods: The seedlings were raised in portrays in advance to onset of monsoon during last week of May (28th May in 2021 kharif and 30th May in 2022 kharif) in both the years by filling portrays with cocopeat and vermicompost in 1:1 ratio. Transplanting of 24 days and 25 days old seedlings were done on 20th June in 2021 kharif and 23th June in 2022 kharif, respectively, on the same day of dibbling in the main field at 100 cm × 100 cm ,120 cm × 120 cm square geometry and 150 cm × 60 cm. Nutrient management treatments were imposed one week after sowing. Result: Among the planting methods higher nodule number and nitrogenase activity with transplanting compared to dibbling. 120 cm × 120 cm found higher nodule number plant-1 and nitrogenase activity but biological nitrogen fixation was higher with 100 cm × 100 cm ha-1 basis. With respect on nutrient management practices, control performed well in terms of higher nitrogenase activity and biological nitrogen fixation and on par with integrated approach of 100% soil test based NPK + vermicompost + PSB + seed treatment with Rhizobium. So, with transplanting method of establishment, 100 ´ 100 cm square plant geometry and 100% soil test based NPK + vermicompost + PSB + seed treatment with Rhizobium was recommended agronomic practices for hybrid pigeonpea.

Factors of the business environment and their impact on the activities of enterprises in the Arctic zone

The issues of smoothing spatial differentiation are particularly relevant when it comes to the territories of the North and the Arctic, as they are an indispensable condition for curbing the processes of their degradation. Maintaining the population, improving transport accessibility, social security, increasing the competitiveness of business and entrepreneurship are among the top-priority strategic tasks, the development of solutions to which is given the closest attention today. Since the purpose of this study is to specify the ideas about the Arctic zone as an environment for doing business, the paper presents an analysis of the financial condition of enterprises in the Arctic zone of the Republic of Sakha (Yakutia). As the main research method was chosen the economic and statistical analysis. The profit, which is a positive financial result, is an indicator of the success of a commercial organization. The financial result is important not only for the entrepreneurs, the economic activity of business structures has an impact on the level and quality of life in a particular territory. The study showed that entrepreneurial activity in the Arctic zone is carried out more out of necessity than for the commercial success, its contribution to the economy of the republic is insignificant. The main field of activity for most commercial enterprises and organizations is agriculture, enterprises are are low-profit, but in proportion the share of unprofitable organizations in most municipal districts, it is comparable to other territories of the Republic of Sakha (Yakutia). The implementation of major infrastructure projects on the territory of the republic in the coming years can improve the business environment and have a positive impact on the development of entrepreneurial activity in the Arctic zone of the Republic of Sakha (Yakutia) if the balance of interests of municipalities, on the one hand, and raw material corporations and natural monopolies, on the other, is maintained.

Ecological engineering in low land rice for brown plant hopper, Nilaparvata lugens (Stål) management.

Rice field bunds and edges can act as near crop habitats, available for planting flowering plants to attract and conserve the natural enemies. We evaluated the effect of ecological engineering on the incidence of Brown Planthopper (BPH), Nilaparvata lugens (Stål)(Hemiptera; Delphacidae) and the abundance of its predators in the rice variety Pusa Basmati-1121. Plots included the oilseed crops viz. sesamum, sunflower and soybean, with plantings of flowering crops marigold, balsam and gaillardia as bund flora around the edges of rice plots. Ecologically engineered plots contained both crops+flowers and resulted in a significantly reduced BPH population per hill in rice plots for 2019 (6.3) and 2020 (9.4) compared to the control plots (9.8 and 14.4). Ecologically engineered plots also witnessed the delayed appearance of BPH during each growing season. Peak BPH populations are lower in the ecologically engineered plots than in the control grounds. Furthermore, the activity of natural enemies, viz., spiders, mirid bugs and rove beetles was the highest in rice fields planted with oilseed crops like sesamum, sunflower and soybean. Olfactory response studies showed that the attraction response of spiders toward sesamum and balsam leaves was more significant than in other crop plants. Rice yield was enhanced in plots planted with crops+flowers during both seasons compared to control plots. Planting of oilseed crops plants such as sesamum, sunflower and soybean with flowering crops such as marigold, balsam and gaillardia as bund flora on the bunds around the main rice field enhanced the natural enemy activity, suppressed the planthopper population, and increased yields. Based on the results, we recommend including ecological engineering techniques as one of the management components in the Integrated Pest Management programme for rice crops.

Religious Freedom as a Political Technology

The principles of freedom of conscience and of non-discrimination on religious and national grounds, forming the basis of international declarations and constitutions of most states of the world, have become a great historical achievement of mankind. However, at a certain stage, the freedom of conscience became a political tool. This was caused by the desire of Western governments, mainly the United States, to create their own democracy canon that could be introduced into other societies and states, making them open to American interests. The religious factor has acquired a great political signifi cance both in regional and global confl icts, and in the struggle between neoliberal anti-traditionalism and identism, which protects the right of nations, cultures and conservative religions to preserve their identity, instead of transforming along with the pattern of left-liberal elites, LGBT communities, feminists and environmentalists. Neoliberalism, or anti-traditionalism, eagerly brands any declaration of civilizational identity as “xenophobia” and “fascism”. Religion has become one of the main fi elds, where the struggle between identity and anti-traditionalism or “liberal democracy” takes place. The article highlights several areas, where the religious freedom is used as a technology in real politics. The fi rst one is the democratization of legislation in individual countries and the adjustment of its provisions related to the freedom of conscience, the status of religious associations and the regulation of their activity. The second one is the shaping of public opinion and the formation of public interest organizations that promote the principles of religious freedom and act in line with the neoliberal understanding of democracy and the norms of political correctness. The third one is interreligious round tables and trainings with the participation of public off icials, religious leaders and public associations, which is something other than just an interreligious dialogue. They “equalize” Muslims, Orthodox Christians, Catholics, and Protestants in the public fi eld. The principles of religious freedom that the society and the state need in the context of Western anti-traditionalism have become their opposite. Pluralism and religious diversity started to be used as the primary target, since they both most closely corresponded to the demands of American liberal democracy and world anti-identity. The current religious freedom turned out to be far from the tolerance of the Peace of Westphalia. Instead of peaceful coexistence, the new concept of the freedom of conscience, on the contrary, often suggests the oppression of dominant churches and traditions.

The impact of head orientation with respect to B0 on diffusion tensor MRI measures.

Diffusion tensor MRI (DT-MRI) remains the most commonly used approach to characterise white matter (WM) anisotropy. However, DT estimates may be affected by tissue orientation w.r.t. due to local gradients and intrinsic orientation dependence induced by the microstructure. This work aimed to investigate whether and how diffusion tensor MRI-derived measures depend on the orientation of the head with respect to the static magnetic field, . By simulating WM as two compartments, we demonstrated that compartmental anisotropy can induce the dependence of diffusion tensor measures on the angle between WM fibres and the magnetic field. In in vivo experiments, reduced radial diffusivity and increased axial diffusivity were observed in white matter fibres perpendicular to compared to those parallel to . Fractional anisotropy varied by up to as a function of the angle between WM fibres and the orientation of the main magnetic field. To conclude, fibre orientation w.r.t. is responsible for up to variance in diffusion tensor measures across the whole brain white matter from all subjects and head orientations. Fibre orientation w.r.t. may introduce additional variance in clinical research studies using diffusion tensor imaging, particularly when it is difficult to control for (e.g., fetal or neonatal imaging, or when the trajectories of fibres change due to, e.g., space occupying lesions).

Development of a Digital Based Sit and Reach Test and Measurement Tool

The purpose of this study was to produce an effective and efficient digital-based sit and reach measurement test kit as a test development and measurement of back muscle flexibility. The type of research in this research is a mixed methods research with a Research & Development (R&D) research design from Borg and Gall. This research was conducted with 9 research stages namely, (1) Research and information collecting, (2) Planning, (3) Develop preliminary form of product, (4) Preliminary field testing, (5) Main product revision, (6) Main field testing, (7) Operational product revision, (8) Operational field testing, (9) Final product revision. The population in this study used students from the Faculty of Sports Science and Athletes of Pelatda Sumut. Furthermore, from the Phase I trial, totaling 15 people showed a score of 87.8% with the Eligible criteria, then from the Phase II trial, which totaled 30 Pelatda Sumut athletes, it showed a figure of 90% in the Very Eligible category. From the results of the research/feasibility test carried out by test and measurement experts, IT experts and sports academic experts, it shows a score of 96% in the Very Eligible category, so it can be used. Based on the data obtained, the development of a digital-based sit and reach test and measurement tool was declared feasible to be developed as a test tool and measurement of back muscle flexibility.

Kuy Learn to Pray Application to Train the Practice of Prayer in Children

Background. This research aims to create an android application-based prayer learning media product to train and teach prayer to children. This research uses a type of development research or known as Research & Development (R&D).
 Purpose. The development model used in this research refers to the Borg and Gall development model.
 Method. The research process begins with a preliminary study to see the problems that occur, the potential for development, determining the literature review relevant to the problems that occur to plan the manufacture of the initial product design, initial product field trials.
 Results. , product revision I, main field trials, product revision II, operational field trials.
 Conclusion. final product revision and dissemination and implementation of product application. The results of the research on the use of the Kuy Belajar Shalat Application developed in this study with a series of steps and stages of trials can be said to be effective for training children in learning prayers because there is an increase in scores in each trial conducted

On the Validation of the Rotation Procedure from HEE to MEMFA Reference Frame in the Presence of Alfvén Waves in the Interplanetary Medium

Alfvén waves play an important role in the stability, heating, and transport of magnetized plasmas. They are found to be ubiquitous in solar winds (SW), which mainly propagate outward from the Sun, especially in high-speed streams that originate from coronal holes. When high-speed streams impinge on the Earth’s magnetosphere, the impact of Alfvénic fluctuations can cause magnetic reconnections between the intermittent southward Interplanetary Magnetic Field (IMF) and the geomagnetic field, resulting in energy injection from the SW into the Earth’s magnetosphere. In this work, we tested a rotation procedure from the Heliocentric Earth Ecliptic (HEE) to the Mean ElectroMagnetic Fields Aligned (MEMFA) reference frame. This is achieved by means of the Empirical Mode Decomposition (EMD) method for both the SW velocity and IMF at 1 AU. Our aim is to check the reliability of the method and its limitations in identifying Alfvénic fluctuations through the spectral analysis of time series in the MEMFA coordinate system. With this procedure, we studied the fluctuations in the main-field-aligned direction and those in the orthogonal plane to the main field. To highlight the peculiarities of each case of study and be able to better identify Alfvén waves when applying this procedure to real data, we reproduced the magnetic and velocity fields of a typical corotating high-speed stream. We tested the procedure in several cases by varying the amplitude of Alfvén waves and noise .We performed the spectral analysis of the Mean Field Aligned (MFA) component of both the magnetic and velocity fields to define the power related to the two main directions: the one aligned to the ambient magnetic field and the one orthogonal to it. The efficiency of the procedure and the results’ reliability are supported by Monte Carlo (MC) tests. The method is also applied to a real case that is represented by a selected corotating SW stream that occurred during August 2008, which fell in the solar minimum of solar cycle 23. The results are also compared with those obtained by using Elsässer variables to analyze the Alfvénicity of fluctuations via the normalized cross helicity and the normalized residual energy.

The geomagnetic response to the X-class solar flares of September 2017

This study analyzes the variations in the levels of the Earth's magnetic field and its fluctuations in the range of periods of 1–1000 s that accompanied X-class solar flare on 6, 7, and 10 September 2017. Variations of the main Geomagnetic field (GMF) and the fluctuations in the range of periods 1–1000 s were measured by the magnetometer (located at 49.93°N, 36.95°E). The X9.3-class solar flare (SF) on 6 September 2017 induced substantial decreases in X-, Y-, and Z-component levels (−30 nT, −60 nT, and −15 nT, respectively), i.e., crochet effect. These reductions were restored within approximately 60, 150, and 5 min. Additionally, measurements from a magnetometer-fluxmeter (located at 49.64°N, 36.93°E) revealed a temporary sharp decrease in X- (approximately −3 nT) and Y-component (approximately −6 nT) fluctuations, followed by a subsequent increase/restoration lasting 12–15 min. The X8.2 solar flare that occurred on 10 September induced a minor reduction (<10 nT) in the levels of all local GMF components. Concurrently, it triggered a 1.5- to 2-fold amplification of quasi-sinusoidal oscillations in the Y-component fluctuations, characterized by a period of ∼10–12 min and a duration of ∼60 min. The study also discusses the mechanism of variations in the level of the GMF.

Development of Doratoon Animation Media on the Material of Faith in the Angels of Allah to Improve the Abillty to Memorize Daily Prayers

Background. This research aims to create a Doratoon application-based learning media product to train children's understanding of faith in God's angels using the Doratoon application. This research uses a type of development research known as Research &amp; Development (R&amp;D&#x0D; Purpose. The research process begins with a preliminary study to see the problems that occur, the potential for development.&#x0D; Method. determining the literature review that is relevant to the problems that occur to plan the manufacture of initial product design, initial product field trials, product revision I, main field trials, product revision II.&#x0D; Results. , operational field trials, final product revision and dissemination and implementation of product application.&#x0D; Conclusion. The results of the research on the use of the Doratoon Application developed in this study with a series of steps and trial stages can be said to be successful in training children's understanding of faith in the angels of God because there is an increase in scores at each stage of the trial carried out

Social Network Analysis Uses and Contributions to Innovation Initiatives in Rural Areas: A Review

This paper identifies the main contributions of Social Network Analysis (SNA) use in the study of innovations in rural areas with an emphasis on agriculture and forestry. The bibliographic analysis was carried out on the Web of Knowledge (WoK) and Scopus platforms. Sixty-eight studies were found in which SNA was used as the main research tool in innovation processes in rural areas. The main fields of the SNA contribution were as follows: (i) social capital; (ii) social learning: information and knowledge flow for the adoption of innovations produced through existing social structures; (iii) the implementation and evaluation of innovations for local and territorial dynamization. The study contributes to summarizing the existing knowledge on SNA use in the study of innovations in rural areas and to informing future research. Understanding social networks is essential to strengthen and enhance the existing social capital and to promote social learning related to innovations in rural areas.

Sub-harmonic-based Cost-effective Brushless Wound Rotor Synchronous Machine Topology

This paper proposes a sub-harmonic-based brushless wound rotor synchronous machine (WRSM) topology. The proposed topology involves two three-phase stator windings with a different number of turns. Both windings are linked in parallel and are provided with current from a single inverter. One of these windings is a four-pole winding while the second winding is a two-pole winding. This arrangement generates a magneto-motive force (MMF) in the air-gap of the machine comprising of two components: a regular fundamental MMF and a sub-harmonic MMF. The fundamental component produces the main stator field whereas the sub-harmonic component generates a sub-harmonic field that is utilized to produce a harmonic current in a two-pole rotor harmonic winding. The induced harmonic current is rectified to inject direct current (DC) to the field winding and produce a four-pole rotor magnetic field. The four-pole rotor magnetic field when magnetically interacts with the same number of the main stator field poles producing torque. Finite element analysis (FEA) is carried out to confirm the operation and achieve the electromagnetic behavior of theproposed topology.

First Report of Hemp Fusarium Wilt Caused by Fusarium oxysporum in Croatia.

Wilted hemp (Cannabis sativa L.) plants were observed in August 2019 in commercial fields around Osijek, Croatia. Plants and roots with disease symptoms were collected. The single-spored isolates produced septate cottony white to light pink aerial mycelium and purple undersurface on potato dextrose agar (PDA). Smooth and hyaline hyphae were branched and septate. Macroconidia were fusiform to sickle-shaped with foot-shaped basal cells, elongated apical cells and three to five septa. Sequencing of the internal transcribed spacer and the partial elongation factor 1-α gene identified the species as Fusarium oxysporum. Artificial infection fulfills Koch's postulates, producing plants which show stunted growth and wilt symptoms similar to those observed in the commercial fields. Control seedlings remained symptomless and healthy. To the best of our knowledge, this is the first report of hemp Fusarium wilt causing F. oxysporum in Croatia. Considering that F. oxysporum has been reported in main field crops in Croatia, the presence of this pathogen could cause economically significant hemp production decreases, especially in humid and cold springs and susceptible varieties.

Accurate and fast measurement of alkali-metal and noble-gas atoms spin polarizability based on frequency response in SERF co-magnetometer

Accurate and fast measurement of the spin polarizability of alkali-metal and noble-gas atoms in co-magnetometer is essential to improve the sensitivity of ultra-sensitive inertial measurements. We establish a frequency response model of K-Rb-21Ne spin strongly coupled ensembles, based on this we present a method for simultaneously measuring the spin polarization of 21Ne and Rb atoms. By applying magnetic field in y-direction oscillating at a fixed frequency, the z-axis main magnetic field value is changed linearly at the same time, the polarizability of Rb and 21Ne spins can be simultaneously obtained. The experimental results were highly consistent with analytical results. By applying a gradient magnetic field to amplify the effect of atomics depolarization, the self-compensating magnetic field points and atomic ensemble polarizability were measured three times continuously using our method and another method. The results proved that this method has fast measurement speed, high accuracy, and low influence on spin polarisation.

A Quick-Look Software for In Situ Magnetic Field Modeling from Onboard Unmanned Aircraft Vehicles (UAVs) Measurements

UAVs represent a tremendous opportunity to perform geophysical and repeated experiments, particularly in volcanic contexts. Their ability to be deployed rapidly and fly at various altitudes and the fact that they are easy to operate despite complex field conditions make them attractive for magnetic surveys. Detailed maps of the magnetic field in turn bring key constraints on the rocks’ composition, thermal anomalies, intrusive systems, and crustal contrast evolution. Yet, raw magnetic field measurements require careful processing to minimize directional, positional, and crossover errors. Moreover, stitching together adjacent or overlapping surveys acquired at different times and altitudes is not a trivial task. Therefore, it is challenging in remote areas to directly evaluate the consistency of a survey and to ascertain the success of the field mission. In this paper, we present a fast algorithm allowing for a quick-look modeling of scalar magnetic intensity measurements. The approach relies on rectangular harmonic analysis (RHA). The field measurements are automatically corrected for a global main field. Then, they are projected along this main field and modeled in terms of RHA functions. The software can exploit the quality indices provided with data and a procedure is applied to mitigate the effect of outliers. Maps for the scalar and the vector anomaly fields are readily built on an interpolated regular grid leveled at a constant altitude. In order to assess the modeling and the inversion procedures, analyses are carried out with synthetic measurements derived from a high-resolution global lithospheric magnetic field model estimated on the French aeromagnetic grid and at UAV locations with some added nonrandom noise. These analyses indicate that RHA is efficient for first-order and direct mapping of the crustal magnetic field structures measured by UAVs but that it could be applied on airborne and marine magnetic intensity data covering dense and large geographical extensions.

Impact of Climate Resilient Technology on Growth and Yield of Paddy (Oryza sativa L.) under Submergence Condition

The submergence of rice fields is a significant issue in India's rice production, which is further aggravated by the unpredictable monsoon rain patterns and the impact of climate change. Larger variation in rainfall patterns affected by the timing of nursery raising and transplanting later in the main field therefore, we adopted Climate Resilient Technology (CRT) for rice production, Extended seedbed durations for rice seedlings allow for adequate rainfall during the monsoon season. So that the experiment was conducted at 30 farmer’s fields of NICRA village, Khana Bari, Kishanganj, Bihar, India, in 2022 under the supervision farm science Center, Kishanganj, the experiment was framed in randomized block design with ten replications. All plots received the recommended dose of fertilizers (120:60:40 kg ha-1 N.P.K.) in equal amounts. Urea, di-ammonium phosphate, and muriate of potash were used as the sources of nitrogen, phosphorus, and potassium, respectively. To determine the growth characters i.e., plant height (cm) at harvest stage, number of effective tillers hill-1, LAI, Chlorophyll concentration (SPAD) and days to 50 per cent flowering were recorded at 90 days. Yield attributes viz., After the completion of the harvest, various observations were recorded, such as the number of panicles/m2, the number of grains per panicle, the number of filled and unfilled grains per panicle, the test weight in grams, and the yield. This encompassed grain yield, straw yield, biological yield in quintals per hectare, and harvest index percentage. During the field experiment, both the climate-resilient technology Swarna Sub1 and Sabour Sampans paddy varieties were tested. Swarna Sub1 was found to be significantly superior in terms of plant growth, yield attributes, and yield characteristics. under submergence conditions. The significant maximum grain yield (48 q ha-1), straw yield (84 q ha-1), biological yield (153 q ha-1), and harvest index (45%) were recorded in Swarna Sub-1.

Study on the Relationship between Hang Seng Index and FTSE CHI Index in Hong Kong: Evidence from VAR Model

The stock index is very important to study the overall trend of the development of financial markets and the development of the stock industry. This paper mainly studies the interaction between stock indexes and the influence of the main fields included in the stock index on the index and related indexes. In this paper, Hong Kong Hang Seng Index and FTSE CHI index were selected for research, and impulse response analysis and variance decomposition analysis were carried out on the data through VAR model. By analyzing the results, the following conclusions can be drawn: First, the model is convergent. Second, the influence from one market to another market persist for several periods. Third, with the increase of lag period, FTSE CHI HK Index was influenced by HK Hang Seng Index and finally stabilized at about 96.1906% and HK Hang Seng Index was influenced by FTSE CHI HK Index and finally stabilized at about 93.995%.

A comprehensive review of the use of Sodium Chloride (NaCl) in the development of the COVID-19 vaccine and medical applications

Salt, specifically sodium chloride (NaCl), is the most common and essential salt used in chemical industries, food production and medical applications. This review extensively looked into the use of salt in medical applications and the development of vaccines, including the recently developed SARS-CoV-2 vaccine. This review also discussed several salt-producing systems to further understand the source of salt. This study focused on several main fields of medical use of salt: saline solution content, respiratory filtration, hyponatremia, ophthalmology, dermatology, and vaccine development studies. Several studies identified that NaCl could deactivate viruses as observed, NaCl is part of the COVID-19 vaccine excipient for Pfizer-BioNTech and AstraZeneca. Further applications of sodium chloride should be explored due to its various advantages in the medical field.