bluuebunny/crossref_metadata_2025 huggingface dataset:
Strontium Aluminate Compound as Road Line Materials Application
Authors:   Department of Civil Engineering, Faculty of Engineering, National Defense University of Malaysia, Sg. Besi Camp, Kuala Lumpur, Malaysia, Munikanan Vikneswaran , Peng Ng Choy ,   Department of Civil Engineering, Faculty of Engineering, National Defense University of Malaysia, Sg. Besi Camp, Kuala Lumpur, Malaysia, Yahya Muhamad Azani ,   Department of Civil Engineering, Faculty of Engineering, National Defense University of Malaysia, Sg. Besi Camp, Kuala Lumpur, Malaysia, Yusof Mohammed Alias ,   Department of Civil Engineering, Faculty of Engineering, National Defense University of Malaysia, Sg. Besi Camp, Kuala Lumpur, Malaysia
Published: April 2023

Road line marking are used as a mean of controlling traffic and road user safety. It is very significant on any roads and intersections as they promote road safety. They highlight a harmonious flow of traffic along guided paths of travel. The objectives of this study are to investigate the properties of road line materials and examine the illuminance properties of glow in the dark powder applied in road marking materials. The use of photoluminescent glow-in-the-dark material was tested in the lab for its suitability (luminosity and the glow duration). The methods involved are selection of suitable type of glow in the dark materials, selection of optimum mixing ratio of the glow in the dark powder with thermoplastic powder, and finally analyzed for the properties of the type of the material chosen. The fine granular strontium aluminate compound, SrAl2O4 was selected as the most suitable type of glow in the dark material. Based on the laboratory analysis, the optimum ratio of the glow in the dark material to be used with thermoplastic powder is 55% of total mix volume. The average visible light emission period is in acceptable range of 20 m. This is a suitable distance to implement the road line because of the high visibility on the road during dark or night.
The Effect of Period of Time (T) from 900Hz – 1820Hz of Transcutaneous Electrical Nerve Stimulator for Biomedical Application
Authors:   Department of Electrical & Electronic Engineering, Faculty of Engineering, National Defense University of Malaysia, Sg. Besi Camp, 57000, Kuala Lumpur, Malaysia, Miskon A. , Salleh M. S. ,   Department of Electrical & Electronic Engineering, Faculty of Engineering, National Defense University of Malaysia, Sg. Besi Camp, 57000, Kuala Lumpur, Malaysia, Tawil S. N. M. ,   Department of Electrical & Electronic Engineering, Faculty of Engineering, National Defense University of Malaysia, Sg. Besi Camp, 57000, Kuala Lumpur, Malaysia, Mohd Sabri Mohd Salman ,   Department of Electrical & Electronic Engineering, Faculty of Engineering, National Defense University of Malaysia, Sg. Besi Camp, 57000, Kuala Lumpur, Malaysia, Rokmanuddin N. R. S. ,   Royal Signal Regiment, Malaysia Armed Forces, Kuala Lumpur, Malaysia
Published: April 2023

Transcutaneous Electrical Nerve Stimulator (TENS) is a device that can stimulate the nerves by using electric current. The main role of TENS is as a pain relief to users by replacing the usage of analgesic or drug. 2-Channel Defence Transcutaneous Electrical Stem Stimulator (2-Channel DTES) device and 5-Channel Defence Transcutaneous Electrical Stem Stimulator (5-Channel DTES) has been developed to improve the previous TENS devices but there were some shortcomings of the devices such as incoming noise in circuit as well as different measurement results if compared to simulation and experimental test. These problems may be solved by designing an alternative circuit of TENS to overcome the noise issue appearing during testing in which this study has tested and analyzed the basic circuit of TENS unit. Even though an issue of incoming small amount of generated electric current, apparently it would not affect the patient by using TENS. The capability of TENS as pain relief has been demonstrated to be comfortable, user friendly, and highly efficient to the user. From the experimental, it has been observed that the percentage measured for period of time, T from 900 Hz to 1820 Hz output measurement using implementation without electrode pads and with electrode pads of Transcutaneous Electrical Nerve Stimulator for biomedical application is around ± 5%.
Behavior of Residual Soil with High Silt Content Under Low Frequency Cyclic Loading Using Modified Direct Simple Shear Apparatus
Authors:   Institute of Energy Infrastructure, Universiti Tenaga Nasional, Jalan IKRAM-UNITEN, Kajang, Selangor, Malaysia, Thiruchelvam Sivadass , Mustapha Kamal Nasharuddin ,   Institute of Energy Infrastructure, Universiti Tenaga Nasional, Jalan IKRAM-UNITEN, Kajang, Selangor, Malaysia, Yong Lee Choon ,   Institute of Energy Infrastructure, Universiti Tenaga Nasional, Jalan IKRAM-UNITEN, Kajang, Selangor, Malaysia, Sabri Muda Rahsidi ,   TNB Research Sdn. Bhd., Kawasan Industri Penyelidikan, Kajang, Selangor, Malaysia
Published: April 2023

This paper presents the experimental work on typical Malaysian silty residual soils in order to evaluate fundamental soil properties in particular its stiffness under low frequency cyclic loading. There has been very little information on local silty residual soils which is very important for local geotechnical design purposes. Lack of such information contributes to the dependency of foreign soil data which might not be representative of local silty residual soils. This study departs from the basis of there have been verified evidences that we are not spared from seismic activity in Malaysia. Hence, it would be misleading if we were to exclude soil properties under cyclic loading for design purposes in Malaysia. This research revolves around the development of simplified device to evaluate the stress-strain behaviour of soils under simple shear strain conditions. The cyclic loading test results on Malaysian sedimentary residual soil sample exhibit increase of drained shear stiffness, GSTIF and gained strength after 30 cycles indicating cyclic hardening behaviour. It is evident that magnitudes of cyclic load and cyclic displacement influences the rate of soil volume change. Nevertheless, the densification of soil samples due to increment of cycles caused reduction in volume change. It is foreseen that the obtained parameters could assist in the practical geotechnical engineering problems related to cyclic conditions.
Lightning Impulse Breakdown Voltage RBDPO with the Presence of Metallic Particles Under a Uniform Electric Field
Authors:   Fakulti Kejuruteraan, Universiti Pertahanan Nasional Malaysia, Malaysia, Kem Sg. Besi, Kuala Lumpur, Malaysia, Ishak Mohd Taufiq , Jusoh Mohd Taufik ,   Fakulti Kejuruteraan, Universiti Pertahanan Nasional Malaysia, Malaysia, Kem Sg. Besi, Kuala Lumpur, Malaysia, Adnan Jaafar ,   Fakulti Kejuruteraan, Universiti Pertahanan Nasional Malaysia, Malaysia, Kem Sg. Besi, Kuala Lumpur, Malaysia, Abd. Rahman Rahisham ,   Fakulti Kejuruteraan Elektrik dan Elektronik Universiti Tun Huessin Onn Malaysia, Malaysia
Published: April 2023

The performance of liquid insulation in power transformer is vulnerable to particles, especially the metallic particles. This paper presents the experimental study on the effect of metallic particles on the palm oil (PO) as dielectric insulating fluid under lightning impulse breakdown voltage. The type of PO used in this study is refined, bleached and deodorized Palm Oil (RBDPO) Olein. Two different types of metallic particles (copper and iron) with different concentrations (clean, low, medium, and high) were studied. The lightning impulse test has been carried out according to IEC 60897 standard and under the influence of a uniform electric field. For the comparative purpose, similar test has been carried out with mineral oil (MO). The presence of metallic particles reduces the average lightning impulse breakdown voltage of MO and PO but shows less significant effect to MO. This is because the streamers in the PO propagate faster and further than in the MO at the same voltage level. Hence, causing the breakdown voltage of PO lower than MO. Under negative lightning impulse, the breakdown voltage of MO is slightly higher than RBDPO. From the study, the increment of the number of particle level contamination will reduce the lightning impulse breakdown voltages of the PO.
Implementation of Early Warning System in Kampung Jenagor, Kuala Berang as an Effort to Increase Human Resilience Towards Flood Disaster
Authors:   Institute of Energy Infrastructure, Universiti Tenaga Nasional, Jalan IKRAM-UNITEN, Kajang, Selangor, Malaysia, Ghazali Azrul , Thiruchelvam Sivadass ,   Institute of Energy Infrastructure, Universiti Tenaga Nasional, Jalan IKRAM-UNITEN, Kajang, Selangor, Malaysia, Mustapha Kamal Nasharuddin ,   Institute of Energy Infrastructure, Universiti Tenaga Nasional, Jalan IKRAM-UNITEN, Kajang, Selangor, Malaysia, Muda Rahsidi Sabri ,   TNB Research Sdn. Bhd., Kawasan Industri Penyelidikan, Kajang, Selangor, Malaysia, Dato’ Yahya Nora ,   Institute of Energy Infrastructure, Universiti Tenaga Nasional, Jalan IKRAM-UNITEN, Kajang, Selangor, Malaysia, Hasini Hasril ,   Institute of Energy Infrastructure, Universiti Tenaga Nasional, Jalan IKRAM-UNITEN, Kajang, Selangor, Malaysia, Jin Ng Yu ,   Institute of Energy Infrastructure, Universiti Tenaga Nasional, Jalan IKRAM-UNITEN, Kajang, Selangor, Malaysia, Norkhairi Fatin Faiqa ,   Institute of Energy Infrastructure, Universiti Tenaga Nasional, Jalan IKRAM-UNITEN, Kajang, Selangor, Malaysia
Published: April 2023

Residents living downstream of Kenyir dam (Stesen Janaelektrik Sultan Mahmud) are at risk of being flooded due to overflow through spillway, or worst, dam breaks. The nearest community to Kenyir dam is Kampung Jenagor (Kampung Jenagor) residents. A disaster preparedness action plan was proposed to equip the residents with essential knowledge on how to respond to such disaster and how to safely evacuate to designated safe havens. This paper presents one key element of the mentioned action plan, which is to develop and install a flood disaster early warning system. The system is aimed to effectively disseminate warning to Kampung Jenagor residents and ensure that there is a constant state of preparedness. The paper discusses the fundamentals of effective warning dissemination and basic design of Kampung Jenagor’s early warning system.
Cardiac Abnormality Prediction using Tansig Based Multilayer Perceptron
Authors:   Department of Biomedical Engineering, University of Strathclyde, United Kingdom, Mohanty Sibani Priyadarshini , Ahmad Jamil Syahrull Hi-Fi Syam ,   Department of Mathematics, Science & Computer, Polytechnic of Tuanku Syed Sirajuddin, Perlis, Malaysia, Abdul Kadir Jailani ,   Department of Electrical Engineering, Polytechnic of Tuanku Syed Sirajuddin, Perlis, Malaysia, Mohd Sabri Mohd Salman ,   Faculty of Engineering, National Defence University of Malaysia, Kuala Lumpur, Sg. Besi Camp. Kuala Lumpur, Malaysia, Hashim Fakroul Ridzuan ,   Faculty of Engineering, National Defence University of Malaysia, Kuala Lumpur, Sg. Besi Camp. Kuala Lumpur, Malaysia
Published: April 2023

An artificial neural network (ANN) is a network designed with adaptation to a computer system. The developed computer system will perform functions oriented to the way the brain works (neuron concept). This study is an extension to the study of the suitability of ANN to be applied in numbers of applications, especially in the field of medical engineering. ANN has been widely being used in medicine, ANN is widely applied in education, research, and even decision making. In this study, ANN will be trained for pre-testing to predict the cardiac abnormalities symptom based on selected reference parameters. This reference parameter is better known as the input parameter to the ANN to detect cardiac abnormalities, among which are the of the height of peak/wave (amplitude) and time occurrence of peak/wave (duration of time) extracted from the electrocardiogram (ECG) signal. A complete ECG complex contains a P peak, a QRS wave, and a T peak. For each P peak, QRS wave, and T peak, amplitude height and duration will be measured to serve as input parameters. This makes six parameters defined as inputs to the ANN. This study has used a Multilayer Perceptron (MLP) network as ANN structure by being trained using three different training algorithms namely Backpropagation (BP), Lavenberg Marquardt (LM) and Bayesian Regularization (BR). At the end of the study, it showed the MLP network which by BR training algorithm gave the highest accuracy prediction (94.04%), followed by LM (92.95%) and BP (88.77%). In this study all MLP networks were activated using the Tansig activation function.
Illuminating Causes and Barriers Underpinning Forced Labour in Nepal-Malaysia Migration Corridor
Authors: Wahab Andika , Abd Murad Abd Hamid , Shamsuddin Romil
Published: April 2023

This study problematises Malaysia's migrant workers' governance by highlighting that while it can address forced labour, it has no jurisdiction over the recruitment process in source countries. This study attempts to persuade that any efforts to eliminate forced labour should address root causes and barriers underpinning it through a comprehensive migration trajectory approach – i.e., pre-recruitment, pre-departure and post-arrival (during employment) stages. This study focuses on the Nepal-Malaysia migration corridor as one of the essential labour migration pathways involving hundreds of thousands of Nepalis employed as temporary, unskilled and low-wage labourers. Findings and subsequent analyses were informed through a workers' survey involving 76 Nepali workers in Malaysia, in-depth interviews with 28 Nepali workers and 13 Nepali community leaders in Malaysia, and five Nepali leaders in Nepal. Though this study specifically covers the Nepal-Malaysia migration corridor, the causes and systemic barriers discussed are highly relevant to other migration corridors (e.g., Indonesia-Malaysia and Bangladesh-Malaysia).
Intraoperative characteristics of somatotropinomas
Authors: Pletnev R.  V. , Cherebillo V. Yu. , Shatilova A. S. , Bayramova S. A.
Published: April 2023

Background. Acromegaly is a rare disease associated with insulin‑like growth factor 1 hyperproduction due to the presence of pituitary adenoma in the patient. The first‑line treatment of such patients is surgical removal of the formation in order to normalize hormonal status. The main predictors of the ineffectiveness of surgical treatment and relapse of the disease are large tumor size, tumor invasion into the cavernous sinus, and high preoperative levels of growth hormone, as well as Ki‑6 % expression. The search for additional risk factors for disease recurrence, which according to various sources is approximately 30 % after primary surgical treatment, is an urgent task for researchers. In our work, we studied the intraoperative characteristics of the tumor, size of pituitary adenomas according to preoperative magnetic resonance imaging of the brain, degree of invasion of the tumor into the cavernous sinus according to the Knosp classification and compared them with disease outcomes after a year of follow‑up after surgical treatment.

Aim. To identify new markers of aggressive progression of pituitary tumors.

Materials and methods. A retrospective analysis of medical documentation, protocols of operations of 90 patients aged between 19 and 73 years with the diagnosis of growth hormone‑secreting pituitary adenoma was performed. The dia gnosis was confirmed based on clinical picture, laboratory and instrumental examination methods. All patients underwent endoscopic transsphenoidal removal of pituitary adenoma by one surgeon in one medical institution between 2017 and 2019.

Results. Intraoperative characteristics of the tumor, such as the color of the solid component, density, degree of vascularization were compared with the results of laboratory and instrumental data, as well as the results of surgical treatment after a year of follow‑up.

Conclusion. Such intraoperative characteristics of growth hormone‑secreting pituitary adenomas as the purplish‑gray color of the solid component, high vascularization, as well as dense‑elastic consistency of the tumor, can be considered high risk factors for continued tumor growth in the first 6 months after surgical treatment or relapse of the disease during a year of follow‑up.
Radiofrequency ablation of epileptogenic periventricular heterotopia
Authors: Guzeeva A. S. , Denisova N. P. , Dmitriev A. B. , Khalepa A. A. , Zubok N. A. , Efremov F.  A.
Published: April 2023

Background. Periventricular heterotopia is one of the causes of the intractable epilepsy. Different treatments of this pathology show variable efficacy.

Aim. To present the result of radiofrequency ablation of periventricular heterotopia in a patient with drug‑resistant epilepsy.

Materials and methods. 33‑year‑old female patient has been suffering from epilepsy since the age of 19 with frequent focal seizures (up to 70–80 times a month) and bilateral tonic‑clonic seizures (up to 4–6 times a year). In 2018 the patient underwent resection of the right temporal lobe with its medial structures and partial resection of the periventricular heterotopia located in the right lateral ventricle. The frequency of focal seizures after 1st surgical treatment increased till 150 per month, bilateral seizures – up to 3–4 per month. After additional examination stereotaxic radiofrequency ablation of periventricular heterotopia on the right side was performed in 2019 in the Department of Functional Neurosurgery of the Federal Neurosurgical Center (Novosibirsk). In total 5 ablation spots were made in the periventricular heterotopia. Follow‑up period was 14 months. Right after the operation a transient left‑sided hemiparesis has developed (up to 4 score of MRC scale) which regressed by the time of discharge. During 14 months of the follow‑up period the patient had 3 bilateral tonic‑clonic seizures, however, after 2nd surgical treatment focal seizures did not appear.

Conclusion. This clinical case demonstrates sufficient efficacy and relative safety of radiofrequency ablation of periventricular heterotopia in drug‑resistant epilepsy.
REPRESENTATION OF THE EUROPE’S MATERIAL CULTURE IN THE UKRAINIAN LANGUAGE OF THE 16TH–17TH CENTURIES (BASED ON THE NAMES OF FABRICS AND CLOTHING)
Authors:   Taras Shevchenko national University of Kyiv, Bohomolets-Barash Oleksandr
Published: April 2023

The article analyzes the vocabulary for the designation of European fabrics and clothing in the composition of adjective-substantive phrases. The primary in such phrases is the adjective that identifies the place of origin of a certain material/product, as well as indicates its additional characteristics: color, decoration, and quality. As a result of the accumulation of several adjectives, adjective-attribute clusters are formed. The names of fabrics and clothes from many historical lands of modern European countries are documented: Poland, Germany, England, Czech Republic, Netherlands, Belgium, France, Italy, Austria. By directly referring to certain European countries, these nominations form the core of the nominal field of the concept EUROPE The semantic subfield "Fabrics and clothing items", which is part of the semantic field "Material culture" of the concept EUROPE, is built. The variety of European goods, which were operated in the XVI-XVII centuries on the Ukrainian territory, in particular by Ukrainian merchants, testifies to the integration of Ukraine (as part of the Polish-Lithuanian Commonwealth) into the trade space of Europe of that time. Comparative analysis of Ukrainian and Polish names of fabrics contributes to their similarity in both languages due to extralinguistic factors (trade routes of merchants, availability of certain types of fabrics, common features of fashion and wardrobe of certain groups of the population). Relevant European place names and names of merchants from Europe, including ethnonyms, were recorded. These names complement the core and peripheral parts of the nominal field of the EUROPE concept. It was found that certain types of fabrics were valued more and served as a marker of wealthier people; at the same time, other fabrics indicated a lower social status. Valuable goods, including fabrics/clothing, appeared in numerous complaints about offenses (robberies, attacks, clashes); analyzing these fragments of linguistic reality, it is possible to recreate certain features of the culture of that time. Until now, the perception of European fabrics as more expensive, higher quality, and grade has been preserved, which is observed in particular in the television space of modern trade in Ukraine.
VERBAL ROOT *ΜΑΝ- IN ANCIENT GREEK: ETYMOLOGY AND DERIVATIONAL FIELD
Authors:   Danylo Halytsky Lviv National Medical University, Cherniukh-Matsiievska Nadiia
Published: April 2023

The current paper has sought to look at the etymology and derivational capacity of the sub-concept ΜΑΝΙΑ, which belongs to the group of sub-concepts ΝΟΣΟΣ, ΑΣΘΕΝΕΙΑ and ΑΡΡΩΣΤΙΑ that make up the core of the macro-concept DISEASE in the ancient Greek language. The result displays that the root μαν- in ancient Greek can be traced back to the Indo-European root *men-/man and refers to the mental sphere. This conclusion is supported by the analysis of derivatives existing in some Indo-European languages. Following the line of thought that studying the derivational capacity is of crucial importance for the analysis of the chosen sub-concept, the paper singles out 28 derivatives formed from the verbal root μαν- with the meaning of mental disorder. The head of all derivatives that evolved from the mentioned root is the noun ἡ μανία and the verb μαίνομαι which belong to the archaic layer of the Greek lexicon. The majority of derived lexemes are represented by adjectives (14 units) and verbs (12 units). A lot of compound adjectives contain –μανης as the second component and the number of such compounds increased from the Hellenistic era onwards. The paper substantiates that when these adjectives realize the nuclear seme “excessive addiction” it combines with the semes of the first component that commonly serve to express the cause of state. Suffixation and stem compounding that are generally typical for nominal parts of speech (nouns, adjectives) were discovered to be the principal types of word formation. Prefixation was less common and was characteristic of verbs. The research findings illustrate how prefixes partially modify the meaning of primary stems and provide new coinages with additional shades of intensity, relationality, directiveness, sociativity. The semantics of derivatives is motivated by the meaning of the initial stem – “presence of mental deviations”, which later developed into the seme of “inadequacy of behavior”, “exaltation” and “inspiration”. All derivatives maintain close semantic ties with the initial stem.
Trauma-Informed Integrated Care Settings: The Role of the Mental Health Counselor
Authors: Wilson Niko C. , Jones K. Dayle
Published: April 2023

Most individuals with posttraumatic stress disorder (PTSD) and other mental health problems first present in primary care settings, often for seemingly unrelated general medical problems. It is likely that individuals with PTSD will seek treatment for their physical health problems at primary care clinics, making primary care offices de facto mental health care settings. Integrated behavioral health care is a unification between mental health services and medical services with the intention of providing a patient with holistic treatment. Integrated care can provide the opportunity to detect PTSD in patients and provide trauma-informed mental health care. Evidence-based stabilization techniques are greatly needed in integrated care settings where trauma-related mental disorders are highly prevalent. The purpose of this article is to review integrated care, highlight the effects of trauma, and provide trauma-informed techniques to treat the mental health consequences of trauma in an integrated care setting.
The calculation and choice of the electromagnet parameters for the grain and seeds disinfectant device
Authors: Maksimenko Vladimir  A. , Bukhantsov Kirill  N.
Published: April 2023

BACKGROUND: High infection rate of grain harvest, produced in Russia annually, by causative agents of fungal and bacterial diseases, causing significant quantitative losses of grain and decreasing of storage quality, revealed low efficiency of operation of chemical treatment, nowadays widely used in production for disinfection of grain and seeds. Therefore, development of electrophysical disinfection methods, which are environmentally friendly and effective against fungal and bacterial infections, as well as development of technical devices for their implementation is a relevant scientific and production problem.
AIMS: Development of method of choice and definition of reasonable parameters of alternating current generator and electromagnet of disinfectant device for grain and seeds.
METHODS: The study subjects are methods and conditions of generation of alternating magnetic fields in the operational volume of impact on grain seeds flow. The study method is analysis of laws of electromagnetism and adaptation of them to the process of definition of electromagnet parameters for the operational volume of the disinfectant device. The study materials include the adapted mathematical expressions of magnet winding parameters and the method of their use.
RESULTS: For the sake of implementation of the new method of grain and seeds disinfection from causative agents of fungal and bacterial diseases by alternating magnet field, two methods of choice and calculation of electromagnet, which is the key element of the disinfectant device, have been developed. The first method comes to reasonable use of properties of a chosen generator by means of definition of coil winding parameters, ensuring demanded field density. Coil dimensions and time of impact on seeds will determine the device performance for treated grain. In the second method, the capacity of material flow through operational chamber (in the electromagnet) is conditioned by operational needs. It determines the size, parameters and operational modes of chamber (the inductance coil), ensuring the field demand, enough for disinfection, that, in the end, defines the properties of the generator.
CONCLUSIONS: The suggested method makes it possible to accelerate the development of facilities for implementation of highly efficient, energy saving and environmentally friendly technology of low-frequency magnetic disinfection of grain and seeds and to incorporate it in agricultural production.
Justification of the impeller speed choice for optimization of the continuous mixing mode in a facility for preparation of liquid feed mixtures
Authors: Solonshchikov Pavel N.
Published: April 2023

BACKGROUND: In the coming years, most of the main livestock production will be produced on farms under their collective lease, as well as on individual farms, which will ensure intensive development of the industry.
AIMS: The paper is devoted to the study of the liquid feed mixtures preparation under different impeller speeds, under different temperatures of the liquid and with further parameters optimization.
MATERIALS AND METHODS: The experimental facility for the liquid feed mixtures preparation is a multifunctional technical equipment, capable of performing following 3 functions: dosing of material (the whole milk replacer), liquid supply (the pumping function) and mixture preparation (the mixer function).
RESULTS: The study of facilities, based on blade pumps, revealed that the rotational speed n in the range of 1750 to 3000 min-1 is not always effective. Then, the indicators of performance or mixture supply are bigger for these values. Thus, the experiment is carried out based on the synchronism of the rotational speeds of the electric motor and the impeller: n = 750, 1000, 1250, 1500 and 1750 min-1. The application of an asynchronous electric motor implies taking account of slip s being 23%.
CONCLUSIONS: The study of the mixing facility at the continuous mixing mode shows that it is not necessary to take the mixing time into account with given design parameters, as the mixture processing occurs instantly, for a very short time intervals Tc = 0.020.006 s. Experimental studies show that the impeller speed under different temperatures of the liquid affects the degree of the mixture homogeneity, while the number of fixed blades is also considered. Thus, in the continuous mixing mode, the degree of homogeneity Ѳ is 85.2% for a speed n = 9501490 min-1, while the water temperature t is 2024 C.
Assessment of influence of the Common Rail system high-pressure fuel pump design on regularity of fuel supply to a fuel accumulator
Authors: Kulmanakov Sergey P. , Tyutikov Sergey A.
Published: April 2023

BACKGROUND: At the present time all worldwide diesel engine manufacturers have directed their development strategies on the way of reduction of harmful emissions, fuel efficiency improving and increasing of the power per liter. Using only accumulator type system is not sufficient for the goals achievement. It is necessary to use new auxiliary units, such as an exhaust catalyst, an exhaust recirculation system, injection of additional liquids together with diesel fuel, as well as to improve the existing units. Increasing the accuracy of injection rate of a nozzle will make it possible to adjust the engine fuel system more precisely, that will have a positive effect on all development directions of diesel engine engineering. Injection rate of a nozzle is dependent on fuel pressure in the nozzle inlet and on control signal timing. Pressure pulsation with stable timing cause irregularity of injection rate of a nozzle. Possibility of decreasing of nozzle inlet pressure pulsation is mainly defined by design of a high-pressure fuel pump, as it supplies fuel partially. The design optimization will make it possible to increase the accuracy of injection rate, that will make a positive effect on development of the diesel engines promising areas.
AIMS: Study of irregularity of fuel supply by fuel pumps of various diesel engines designs with the Common Rail fuel accumulation system, aimed to decrease fuel oscillations and to improve stability of injection rate of a nozzle.
METHODS: In order to assess the efficiency of high-pressure fuel pump designs, these designs were simulated in the specialised software. Theoretical studies of fuel supply irregularity for various designs of the pumps were carried out.
RESULTS: Graphs of non-uniformity of fuel supply of high-pressure pumps depending on their design are obtained.
CONCLUSIONS: Based on simulations, the conclusions about design influence on fuel supply irregularity of various designs of pump are made, recommendations for use are given.
Modeling the durability of diesel pistons with a crack on the edge of the combustion chamber
Authors: Gots Alexander N. , Abalyaev Andrey Yu. , Fomin Valery M.
Published: April 2023

BACKGROUND: During periodic long-term tests of tractor diesel engines D-240T with a combustion chamber of the CNIDI after 4000 m-hour, a deterioration in the indicators of the working process was observed. After disassembling the diesels, it turned out that the reason for this is the development of cracks on the edge of the combustion chamber (CC), and the deterioration of indicators is detected when the crack has reached a critical length.
AIMS: The aim of study is concerned investigation of a methodology for predicting of a tractor diesel piston durability with the crack on the CC edge and development of a method for calculating the crack evolution to before the transition to the improper state.
METHODS: Both experimental and computational methods were used in the research. Experimental pistons was manufactured with some design changes: the radius of the edge rounding changed, which changed the thickness of the side wall of the CC.
RESULTS: Motor studies of diesel engines have shown that with a certain piston design, a crack either does not appear at all, or appears after a large number of cycles. Additional computational studies have shown that the crack development depends on the stress intensity coefficient at the crack tip. Using the data of experimental studies, a method has been developed for estimating the critical crack length in the edge of the CC, at which the intensity of stresses in the vicinity of its vertex exceeds the limits accepted for this material from which the piston is made.
CONCLUSIONS: A method for calculating the durability of the piston during the development of a crack on the edge of the combustion chamber is proposed. Verification of the calculated data obtained during the numerical implementation of the piston evaluation method using the example of the diesel piston D-240 showed that for a range of crack lengths up to 1 mm and operating time over 7000 m-hour, the calculation error com-pared to the operational test data does not exceed 11%.
Improvement of the design of the feed mixer and analysis of its performance
Authors: Agaev Emil Fikrat ogly , Bagirov Bayram Muhammad oglu
Published: April 2023

BACKGROUND: It has been proven by science and practice that feeding animals with complete feed mixtures can increase the productivity of feed. The preparation of loose feed mixtures has become most widespread. The analytical review of scientific and research works in the field of machinery and technology for the preparation of complete feed mixtures showed the advantage of using batch feed mixers. This is related to the fact that due to the circulation of feed components in a mixer, high quality of feed mixtures is achieved. At the same time, the issue of research and selection of reasonable parameters for improved ideological options in the direction of reducing energy and resource costs remains relevant.
AIMS: Improvement of the design of a vertical batch mixer, elimination of cases of delay in unloading the finished mixture, which negatively affects productivity and the energy, labor and material costs associated with it.
METHODS: The object of the research is the technology and design of a batch feed mixer. The cyclic and hourly average productivity of the mixer is studied. Mathematical expressions that describe the dependence of the loading and unloading duration on the mixer tankage are given. The influence of the mixer tankage on the mixer performance, expressed with a special coefficient, is analyzed. The coefficient range, which positively affects the performance of the facility, has been determined.
RESULTS: It has been established that with the constructive and technological improvement of mixers and ensuring the proper operation, the tankage does not serve as the main factor for productivity increase.
CONCLUSIONS: The maximum productivity of the vertical batch mixer is mainly ensured with the number of cycles of the auger and with the periodic forced supply of the mixture, whereas the quality of mixing depends on the angle of the vane opener.
A New Decade in Seismoacoustics (2010–2022)
Authors: Dannemann Dugick Fransiska , Koch Clinton , Berg Elizabeth , Arrowsmith Stephen , Albert Sarah
Published: April 2023

Several sources of interest often generate both low-frequency acoustic and seismic signals due to energy propagation through the atmosphere and the solid Earth. Seismic and acoustic observations are associated with a wide range of sources, including earthquakes, volcanoes, bolides, chemical and nuclear explosions, ocean noise, and others. The fusion of seismic and acoustic observations contributes to a better understanding of the source, both in terms of constraining source location and physics, as well as the seismic to acoustic coupling of energy. In this review, we summarize progress in seismoacoustic data processing, including recent developments in open-source data availability, low-cost seismic and acoustic sensors, and large-scale deployments of collocated sensors from 2010 to 2022. Similarly, we outline the recent advancements in modeling efforts for both source characteristics and propagation dynamics. Finally, we highlight the advantages of fusing multiphenomenological signals, focusing on current and future techniques to improve source detection, localization, and characterization efforts. This review aims to serve as a reference for seismologists, acousticians, and others within the growing field of seismoacoustics and multiphenomenology research.
College Freshmen’s Experiences of Development During the School Class Transition Period in the COVID-19 Situation
Authors:   center for social welfare research yonsei university, Lim Juwon , Kim Seohyun
Published: April 2023

The prolonged situation of COVID-19 has caused complete chaos in our everyday life and had also an immense impact on the development of the youth in the school class transition to the college level. Thus, this study would qualitatively explore the meaning of college freshmen’s experiences of development during the school class transition period in the COVID-19 situation. To do so, in-depth interviews were held with seven college freshmen who went through the transition period at the time, and the data were analyzed step by step according to the descriptive phenomenological qualitative research method proposed by Giorgi (1985). As a result, 15 components and five categories of the research participants’ perceptions and experiences were vividly revealed. In particular, the categories included “The end of high school years suddenly mixed up due to the COVID-19 pandemic,” “The opportunity barely seized to grow the dream inside and outside the school due to the threat of the infectious disease,” “The college looking empty reached after going through the turmoil of disaster,” “The microsystem’s support that comforted the inevitably lonesome early year as a college student,” and “My mind that allowed myself to hold out the loose entry into adulthood.” In addition, these resulted in the central topic, “The adulthood opened by sprouting the dream in my way despite the school class transition entangled by anxiety.” Lastly, this study made suggestions for supporting the healthy and happy daily life of young adults living while cultivating development during the school class transition period to college in the COVID-19 situation.
Siyasal İletişim ve Sosyal Medya Konularını İçeren Çalışmaların Bibliyometrik Analiz ile İncelenmesi
Authors: SAF Hacı Hasan
Published: April 2023

İletişim üzerine yapılan çalışmalarda siyasal iletişim araştırmaları önemli bir yer tutmaktadır. Niceliksel olarak artan bu çalışmalarda siyasal iletişim betimlenmiş, amaçları, yöntemleri, hedef kitleler üzerindeki etkisi gibi konular ele alınmıştır. Ele alınan bir diğer konu da siyasal iletişim ve medya arasındaki ilişkidir. Bu konu da sıklıkla işlenmiş, son yıllarda ise siyasal iletişim ve sosyal medya arasındaki ilişkiyi içeren çalışma sayısında artış olmuştur. Son yıllarda kullanıcı sayısı ve etkisi artan sosyal medya, siyasal iletişimde önemli bir unsur haline gelmiştir. Bu konuları içeren çalışmaların genel bir incelemesinin yapılması ise elzem olmuştur. Konuları içeren çalışmaların yıl, alan, ülke, üniversite, anahtar kelime, en çok atıf alan yazar ve en çok atıf alan çalışma bağlamında incelenmesi önemlidir. Bu da bibliyometrik analiz ile mümkündür. Bu çalışmada siyasal iletişim ve sosyal medyayla ilgili çalışmaların bibliyometrik profilinin oluşturulması amaçlanmıştır. Bibliyometrik analiz yönteminin kullanıldığı çalışmada Web of Science arama motoruna “political communication” ve “social media” konuları yazılmış ve tüm zamanlarda yazılan yazılar bu sitede taranan indekslerde aranmıştır. Siyasal iletişim ve sosyal medya ile ilgili ilk araştırmanın yapıldığı 2008 ile bu çalışmanın yapıldığı 2022 yılları arasında literatüre kazandırılan 1053 çalışma VOSviewer programı ile ele alınmıştır. Çalışmalar yıl, alan, ülke, üniversite, anahtar kelime, en çok atıf alan yazar ve en çok atıf alan çalışma perspektifinde analiz edilmiş ve çalışmalar arasındaki bağlantılar ortaya koyulmuştur.
Conceptual metaphor in Joe Biden's presidential nomination acceptance speech
Authors: Doan Thuy Linh
Published: April 2023

This study examines the conceptual metaphors used in Joe Biden's first speech in the race to become the 46th President of the United States. The research is based on the ground of conceptual metaphor theory introduced and developed by Lakoff and Johnson (1980). Accordingly, the most frequently used source domains and target domains along with common metaphorical expressions in the selected discourse were identified. The judgment and explanations related to these conceptual metaphors are discussed to explain the success of Joe Biden, the incumbent president of the United States, in using language and achieving voters’ support.
Cultural exchange between Vietnam and Korea in the 16th – 18th centuries
Authors: Nguyen Thi Thu Thuy , Nguyen Thi Hong Van
Published: April 2023

Despite being geographically separated and obstructed, the historical and cultural trajectories of Vietnam and Korea bear some resemblances. Right from the Middle Ages, the influence of Chinese civilization and the ties of tributary relations with Chinese monarchies made Vietnam and Korea have many historical and cultural similarities. Besides, the contacts between Vietnamese and Joseon envoys in China were an essential opportunity to promote cultural exchange and understanding between the two countries. Studies on cultural exchange between Vietnam and Korea throughout history have attracted interest from many researchers, most of whom focus on studying these countries’ cultural exchange through contacts amongst their envoys in China. This article explores the cultural exchange between Vietnam and Korea through the contacts, meetings, and poems of the Vietnamese and Korean ambassadors in China. Cultural exchange activities are expressed in detail through the exchange of poetry and literature between the ambassadors; exchange about the political regime, history, geography, customs, and habits; introduce of the natural picture of Vietnam and Korea,...
The Development and Validation of Pandemic-Related Parental Difficulty Scale for Parents of Preschoolers
Authors:   The Korea Association of Yeolin Education, Kim Seong Hyun
Published: April 2023

The purpose of this study is to develop and validate the pandemic-related parental difficulty scale for parents of preschoolers (PRPDS). To do this, the literature on COVID-19 stress and parents of preschoolers during COVID-19 was analyzed, and related data on the components were collected. Based on collected data, the constituent factors were extracted, and the final draft was constructed. The final draft was developed with the evaluation scale through a verification process of validity and reliability. It was analyzed using the SPSS 26.0 and AMOS 26.0 programs. The subjects used in this study were 638 parents of preschoolers who made assessment [293 Exploratory Factor Analysis(EFA), 345 Confirmatory Factor Analysis (CFA)]. The pandemic-related parental difficulty scale for parents of preschooler developed in this study was composed of 34 questionnaires of following 5 factors: Anxiety about child development (9 questionnaires), increased parenting burden (8 questionnaires), increased family conflict (6 questions), anxiety about infection (6 questions), and economic difficulties (5 questions). As a result of confirmatory factor analysis, it was found to be an appropriate model, and the conceptual reliability, convergence validity, and discriminant validity were all satisfied. The reliability (Cronbach’ ) of these factors ranged from .947 to .980, and the total value of Cronbach’s was found to be .983. These results demonstrate that the pandemic-related parental difficulty scale for parents of preschoolers developed in this study is a valid and reliable tool.
An Exploratory Study of Metaverse Literacy
Authors:   The Korea Association of Yeolin Education, Kim Kyoungeun , Lee Seung-Yun
Published: April 2023

The purpose of this study is to demonstrate foundational information of metaverse literacy education at the level of higher education by theoretically exploring that literacy is necessary to properly understand and utilize them in various ways. In order to achieve this research goal, metaverse is defined as a figured world to explore concepts, components and capabilities of metaverse literacy based on discussions on figured world. The findings are as follows: first, the metaverse literacy consists of the four areas, such as metaverse' sociocultural practices, values and cultural environments, the abilities to interact by everyday language, computer language and data, and characters' identities and independence. As competencies, we suggest the abilities to understand metaverse, and the abilities to develop new values and norms based on metaverse environments, the abilities to understand and reflect on diverse identities placed in the metaverse, and the abilities to cooperate among agents in metaverse by using data and digital tools. We expect to solve these following issues by using the metaverse literacy driven from this study: first, the literacy can be used as components which teachers and students consider in the processes of teaching and learning; second, teachers and students can explore the new status of producers and users in the metaverse; third, they can solve problems when using metaverse, such as interactions in metaverse and understanding multiple identities responsive to diverse types of metaverse.
Comparative study of topical 0.1% tazarotene cream versus calcipotriol 0.005% ointment in the treatment of palmoplantar psoriasis
Authors: Xess Kritika Maria
Published: April 2023

Palmoplantar psoriasis is classified into two types based on morphology- hyperkeratotic palmoplantar psoriasis and pustular palmoplantar psoriasis. Hyperkeratotic palmoplantar psoriasis presents with well deﬁned erythematous scaly plaques with overlying hyperkeratosis without the presence of sterile pustules, predominantly at the palms and/or soles. There is greater physical and functional disability in patients of palmoplantar psoriasis. Patients with palmoplantar disease are more likely to suffer from a significant impact on skin-related QoL, have problems with activities of daily living, and rely on topical prescription medications than patients with moderate-to-severe plaque psoriasis. These differences are important while creating therapeutic strategies and in understanding patients’ expectations of the treatment. Objective: To compare the clinical efficacy and study the adverse effects of topical 0.1% tazarotene cream and 0.005% calcipotriol ointment in the treatment of palmoplantar psoriasis.

A total of 82 palmoplantar psoriasis cases who attended the OPD of a tertiary care hospital in Northern India for a period of two years formed the study group. The study group was randomized into Group A and Group B. Group A participants were instructed to apply a liquid paraffin-based emollient in night, followed by 0.1 % tazarotene cream under occlusion for 12 weeks. Group B patients were instructed to apply calcipotriol ointment 0.005% twice daily on lesions and a liquid-paraffin based emollient in night daily for 12 weeks. The response to treatment was evaluated by improvement in PPPASI at 2-week interval up to 12 weeks.

At 12 weeks of follow-up 42.9% patients showed an excellent response, 31.4% showed a clear response in group A. In group B 25% patients had an excellent response and 10% patients showed complete clearance. Adverse effects were seen more in group A.

Topical treatment modalities for palmoplantar psoriasis are effective and have a low risk for adverse effects. Both topical calcipotriol 0.005% and tazarotene 0.1% cream are effective in the treatment of palmoplantar psoriasis. While topical tazarotene 0.1% cream showed an excellent clinical response among patients, it was associated commonly with adverse effects such as local irritation and itching in initial weeks of the treatment. Usage of topical 0.005% calcipotriol ointment showed a good clinical response among the patients, with mild side effects of local irritation and itching which resolved on subsequent treatment.