bluuebunny/crossref_metadata_2025 huggingface dataset:
When Multidisciplinarity Meets Mathematics Teaching
Authors: Campo Tamar Apel
Published: April 2022

The great expectations put in reform-based mathematics education to solve the existing conflict between the teaching constructum and the learning agents empower “some kind” of different thinking, not vertical, not lateral, but multidimensional. This situation needs to be explored using appropriate tools that enable a clear vision of the complex educational environment where it takes place. The chapter presents in a systematic sequence the various dimensions identified through the use of complex system analysis and the fuzzy set approach. Examples of implementation of the multidisciplinary approach support the theoretical aspects of the phenomena studied and reinforce a didactic change in the normative teaching model. This change complies to the use of differentiation skills in the planning stage enabling a wider perspective of the participants in the teaching situation: mathematics, teacher, and students.
A Numerical Simulation of UIC60 Rail-Weld's Fatigue and Crack Growth under Wheel Frictional Contact and Bending
Authors: Sen Prakash Kumar , Bhiwapurkar Mahesh , Harsha S.P.
Published: April 2022

In service condition rail joints, especially the weldments are under the action of various loadings which are not only working in multiple axis direction but also time-dependent having a cyclic and mixed-mode in nature and non-relative to each other. The surface of the rail and its weldment is acted by very high repetitive stress through the wheel and because of this contact stress the running surface or subsurface may have cracks or fractures due to fatigue. This work is based on numerical simulation of an aluminum thermite weldment on a UIC 60 rail under multi-axial fatigue crack propagation under the friction with surficial interaction between weldment and wheel with bending load due to vertically applied load through the wheel on the weld. Since contact is highly influenced by vertical load and also for minimizing the simulation time the lateral and longitudinal traction forces are not included in this study. The work formulation and discretization have been done with the finite element method and a non-linear lagrangian algorithm solver is applied. A 3-D rail-weld wheel model assembly and a semi-elliptical crack as a flaw on the weld surface are used to identify 3-Modes of SIFs along with its graphical plot generation. Simulation is performed under multi-axial weld wheel surface contact at different locations on weld running surface, taking into account varying position of fracture crack on weld 3-D model to calculate fracture life of weld joint and observation of fatigue crack propagation. This work involves the numerical and theoretical approach of fracture mechanics on created FE fatigue model using the Linear Elastic Fracture Mechanics (LEFM) method following Paris law for fracture mechanics. All the numerical simulation for critical fracture dimension and cycle count with stress intensity factor for weld failure data is estimated using software ANSYS 2020 academic and plotted, then comparison of predicted and observed transverse crack growth behavior and fatigue life of weld, based on Millions Gross Tonnes (MGT) is discussed.
The return of the ‘Black Swan’? Christian pilgrimage to the Holy Land and the Covid-19 pandemic
Authors: Shilo Shahar , Collins-Kreiner Noga
Published: April 2022

This article’s first goal is to propose an interpretation of a historical event of major economic, political, and religious significance with attributes resembling those of the current Covid-19 pandemic: the Roman Empire’s conversion to Christianity. The second goal is to explain and analyze the Christian pilgrimage market and to suggest that, due to its unique nature and attributes, this specific segment has the potential to serve as a preferred focus and an exit strategy from the Coronavirus crisis. The research offers a historical interpretation of Christian pilgrimage to the Holy Land using the theory of the ‘Black Swan’, an economic term introduced by Professor Nassim Nicholas Taleb in 2007. Here we attempt to compare two Black Swans: one that occurred in the year ad 325 and the current Covid-19 pandemic. The economic Black Swan of 325 was the Roman Empire’s conversion to Christianity, a process that caused fatal damage to the myrrh and frankincense economy and completely changed the economy of the southern Land of Israel. In the case of the current crisis, this article suggests that the present conditions may transform the tourism industry in Israel. Based on an analysis of the unique attributes of the Christian pilgrimage sector, it also posits that this specific segment may provide a preferred focus and an exit strategy from the current Coronavirus crisis. The contribution of this article lies in its contemplation of a connection between current and past events, as well as in its consideration of specific market segments (pilgrimage) in the context of national and global exit strategies. The article’s broader goal is to gain a better understanding of the pandemic’s impact not only on the tourism industry as a whole but on its specific segments.
A Design and Implementation of the system framework for Monitoring Indoor Sensor Data based Augmented Reality
Authors:   Computer Engineering, Sunmoon Univ., ASAN, KS002, Republic of Korea, Yoon Jae Chae , Young Park Yoon , Oh Lee Kyung , Gook Gang Hui , Won Lee Ho
Published: April 2022

Abstract— Large and complex buildings are increasing, and many objects exist in these buildings. Objects generate events through interaction with each other. There is an augmented reality among the technologies for recognizing the surrounding environment, and through augmented reality, data generated in the surrounding environment can be grasped to understand the situation. Among the events that occur indoors are indoor disasters, which can cause damage to people and property. Therefore, it is necessary to collect various indoor sensor data to identify indoor disaster events. At this time, the collected indoor sensor data should confirm and understand information. In the case of an indoor sensor, there are signal data for determining a location or a measurement sensor for understanding an indoor environment. Instant feedback may be possible if such indoor sensor data can be checked through a human visual action rather than devices. Accordingly, if augmented reality technology is used, information can be obtained more easily, and data readability becomes convenient. First of all, the augmented reality-based indoor sensor data monitoring system framework was designed by applying coordinate data of inertial sensors to identify a human’s indoor location so that sensor data can be monitored, and a prototype system was implemented through this. This system can be used as a system to monitor data from firefighters or control centers in the event of an indoor disaster.
Digitalization of Modern Society: The Bulgarian Case
Authors:   South-West University, 66 Iv. Mihailov str., Blagoevgrad, Bulgaria, Lendzhova Vladislava , Milenkova Valentina , Manov Boris
Published: April 2022

Abstract— Digitalization is an integral part of society and there is no doubt that modern society is in the midst of digitalization. In all areas of social life there is a wide range of different practices that are subject to digital change. The Internet and social media platforms have changed the way we receive information and experience entertainment, communicate. The objectives of this paper are to show specific dimensions of the advent of digitization and the various technologies in the Bulgarian society. The empirical basis of this article is based on results obtained from an online survey conducted in March 2021 with people of different ages, occupations and education. The survey questionnaire included topics that directly relate to the digitalization of society, the use of various digital devices and the Internet, participation in online education and attitudes towards it Keywords—digitalization, modern society, digital competence, digital skills, Bulgaria.
Application Proposal for Gastritis Diagnosis and Treatment Applying Machine Learning
Authors:   Universidad María Auxiliadora & Av. Canto Bello 431, San Juan de Lurigancho, Siguas Rosa Perez , Solis Hernan Matta , Solis Eduardo Matta , Zamudio Lourdes Matta , Artezano Anika Remuzgo
Published: April 2022

Abstract— Currently one of the most popular diseases that goes unnoticed is gastritis, we found that the main causes of gastritis are those caused by stress, infections, excessive alcohol consumption, frequent use of medications as well as the disorder caused by the hectic pace of life. that most people have today. The purpose of this research work is to analyse, demonstrate, through a logical architecture design and prototype, a proposed application that can detect if the patient has gastritis and what type it is. This research base is intended to be developed and implemented to a large number of patients in Peru in which as a first initiative is the logical proposal argued in this research. Keyword-- Gastritis, Machine Learning, physical health, Patient health
Swimming Pool Heating using Geothermal Source VRF Heat-Pump in Morocco
Authors:   Applied Thermodynamics and Solid Fuels, Mohammedia School of Engineering, University Mohammed V, Rabat Morocco, MAROUF Karime , HACHIMI Said
Published: April 2022

Abstract— Heating swimming pools requires a great deal of energy, especially outdoor pools. The swimming pools must be constantly maintained at temperature - generally 28 °C - the most used means in Morocco is the heating by boiler. As part of this research, and in order to develop ecofriendly and lowimpact solutions on the environment, we choose to study an outdoor swimming pool heated by gas boiler in Rabat. The objective of this article is to size a swimming pool heating installation, using a direct expansion heat pump type VRF geothermal on groundwater. Keywords— Modeling, Swimming pool heating, Air Conditioning, Heating, Dynamic Modeling, Geothermal, Electricity consumption, COP
A Descriptive Statistical Analysis of Electricity Sector Workers’ Ratings of Problems with Electricity Generation in Nigeria
Authors:   Department of Mathematics, Delta State University, Abraka, Nigeria, Tsetimi Jonathan , Ogini Nicholas Olowole , Atonuje Augustine
Published: April 2022

Abstract— In this work we present a descriptive statistical analysis of electricity workers’ ratings of problems with electricity generation in Nigeria. The problems were catalogued from focused group discussions with workers in the electricity sector and were corroborated from existing literature on electricity generation. Willing electricity workers across the country were approached at their break periods by trained interviewers for the data collection. A questionnaire containing a list of problems were administered on electricity workers and they were asked to score the listed problems on a scale of 0 – 10 depending on the severity of the problems. The data were collected on condition of strict anonymity and as such cannot be traced to any individual or company. The data was analysed using IBM SPSS Version 25 and Microsoft Excel. A descriptive statistical analysis is presented with insightful conclusions for stakeholders in the electricity sector who are involved in concerted efforts to find lasting solutions to the plethora of problems facing the electricity sector in Nigeria. From the dataset, the profile of the electricity workers indicate that they are well-informed. The respondent’s perception is that natural disasters is apparently the problem with least severity. The ratings show that the most critical problem is obsolete equipment, followed by maintenance budgets and high cost of production in decreasing order of severity. Ten (10) out of the 14 problems rated in terms of severity had a mean rating >5.0 on a scale of 0 - 10 inclusive. The data for the analysis is available and downloadable in a public repository. Keywords—Data analysis, electricity workers’ ratings, electricity generation, descriptive statistics.
Reduction of Hyperspectral image based on OSP and a Filter based on Bhattacharyya Distance
Authors:   Laboratory of Engineering, Industrial and Management of Innovation (IMMII), Faculty of Science and Technology, University Hassan 1st, Settat, Morocco, Mehdi Agouzal , Maria Merzouqi , Arouch Moha
Published: April 2022

Abstract— This article proposes a new method to reduce the dimensionality of the hyperspectral image of Pavia. It became obvious to reduce the hyperspectral image, before their classification. This reduction is done by several strategies and approaches according to the literature. The high dimensionality of the hyperspectral image was and remains a challenge to overcome. Since it contains labelled pixels that belong to the target area and others considered as intruders. For this reason, the proposed method aims to extract the classified pixels by the application of the orthogonal projection of the ground truth on the bands then a selection is made adopting a filter based on the minimization of the distance Bhattacharyya inter classes (one against one: band class against ground truth class). Two other distances Jeffries Matusita and Kullback Leibler were applied in the same level of the algorithm in order to validate the appropriate distance, also to confirm the reliability of the process of the new method. The results of the proposed method obtained by SVM-RBF and also KNN demonstrate a remarkable improvement in classification accuracy. The proposed procedure was able to reach over 94% for only 18 bands; hence a simple Bhattacharyya filter got just 91.45%. Keywords—Bhattacharyya, Classification, Extraction, Jefferies Matusita, Kullback Leibler, KNN, Selection, OSP, RBF-SVM. Reduction of dimensionality
Analysis and Optimization of an Aftermarket Intercooler Spray‟s Nozzle
Authors:   Department of Mechanical Engineering, INTI International University, Nilai, Malaysia, Ma‟arof M. I. N. , Shahid Usman , Chala Girma T. , Suresh Sathurshan
Published: April 2022

Abstract— Nowadays an intercooler is commonly integrated in vehicles to cool the air during induction. However, the intercooler does not perform effectively in countries where the climate is humid and hot as the air temperature is relatively higher. Therefore, this study is focused at developing an aftermarket intercooler spray to combat this predicament. The goal of the study was to improve the performance of a cooling-spray-integrated topmount intercooler via the analysis of nozzle diameter and spraying angles. Experiments were conducted on five nozzle types and three spraying angles: 00 , 150 and 300 . It was observed that the efficiency of the intercooler with the spray cooling unit was improved from 89.7% to 95.33%. A B1/8BX3 Hollow Cone Nozzle gave the highest efficiency, followed by B1/8QPPA+QPHA-5 Standard Full Cone Nozzle, HB1/8VV8007 Flat Fan Nozzle, HB1/8VV-6507 Flat Fan Nozzle and B1/8GG-4.3W Standard Full Cone Nozzle. The highest efficiency was observed at nozzle spray angle of 150 . Nozzle diameter and spraying angle were found critical in ensuring an enhanced overall performance of the intercooler. Keywords —Intercooler; Nozzle; Spray angle; Optimization
Wacana Bencana: Android-Based Natural Disaster Simulation Game
Authors:   Computer Science Department, School of Computer Science, Bina Nusantara University, Jakarta, Indonesia 11480, Udjaja Yogi , Lailany Sabrina
Published: April 2022

Abstract—This research's purpose is to develop a game application with a natural disaster theme that will enable players to gain an understanding of emergency response knowledge towards natural disasters. This game’s title is Wacana Bencana and it has 3 modes of natural disaster: Flood, Earthquake, and Tsunami. The evaluation process of this game is done by distributing: a pre-test questionnaire, a post-test questionnaire, and followed by a user experience questionnaire. The result is, Wacana Bencana game able to increase the knowledge of its players about emergency responses towards natural disasters and players have a very positive reaction to the game. Keywords—Wacana Bencana, Natural Disaster, Simulation, Game
Application of LiDAR System on Firefighting and Rescue
Authors:   Department of Science and Technology, Nguyen Tat Thanh University, Ho Chi Minh City, Vietnam, Tran Thang Viet , Pham Giao N. , Nhat Tran Minh , Nguyen Binh A. , Pham Hanh T. , Le Ngoc T.
Published: April 2022

Abstract— This paper first introduces about LiDAR/ToF (light detection and ranging based on time of flight) sensor system. Then, the chance of applying LiDAR system on firefighting and rescue is also discussed. In addition, via several experiments of using LiDAR system on various levels of low visibility environment condition (such as strong back-ground light, snow, smoke, foggy, dust cloud), we will conclude the configurations and parameters of LiDAR for suitable choices and decisions when considering applying of LiDAR on firefighting and rescue. Keywords-- Firefighting and Rescue; LiDAR; ToF; Low Visibility Environments; SLAM
Implementation of a Mobile Application as a Tool for Recognition and Interpretation of Nonverbal Language to Improve Communication with Deaf-Mute People
Authors:   Systems Engineer Program, Universidad de Ciencias y Humanidades, Lima-Perú, Villacorta Roberto Demmis Muñoz , Aguero Carlos Oscco , Delgado Alexi , Huamaní Enrique Lee
Published: April 2022

In the present study, it was observed that a certain percentage of people with hearing and sound disabilities are not understood, as some non-disabled people do not know or master sign language, resulting in a lack of communication with deaf-mute people. Although it is true that nowadays communication and social inclusion is essential, it is for this reason that the mobile application for the recognition and interpretation of non-verbal language was implemented through the agile SCRUM methodology, it allows a better flexibility in developing the requirements established by the users, in addition, it adapts to the different changes in the development process of the mobile application based on the needs of the users. For the development of the application, a survey was made to citizens of a community, which helped to determine the contents of the mobile application, in which the information module is responsible for detailing information related to hand language and its application, on the other hand, there are the manual translation and consultation modules, which have the functions of translating hand movements, either by means of a camera or a keyboard, among others. As a result, several modules of the mobile application were developed and optimized to meet the needs of the surveyed users. The implementation of the mobile application provided communication and social inclusion facilities, since it allowed a better interaction between people without disabilities and deaf-mute people, generating knowledge about the meaning and execution of hand language. Keywords— Mobile Application, Communication, Sign Language, Non-verbal Language, Interpretation, Deaf Mutes.
Professional competency and challenges of clinical pharmacists in India: An assessment among the Pharm.D. graduates
Authors: Jose Subin Anitha , Chandran C. Sarath , Thomas Aiswarya , Ramesh T C Swathy
Published: April 2022

Objectives: To assess the suitability of the existing Pharm.D. programme curriculum in producing professionally competent clinical pharmacists in India.   
Methods: A survey was conducted using a structured questionnaire with closed-ended questions, among the Pharm.D. graduates who were working as clinical pharmacists across various hospitals in India. The questionnaire was shared using an online platform (Google Forms) among 138 clinical pharmacists and the responses obtained were assessed and discussed.   
Results: The response rate was 25.3% with the majority of participants in the age category below 25 years. 65.7% of participants had not undergone any training programmes to improve their professional skills after the completion of the Pharm.D. programme. 45.7% of the study population had the opinion that the absence of clinical preceptors with clinical knowledge in their pharmacy school was the reason for the weak outcomes of the programme. The weakness of the curriculum was well explained by the participants by the absence of clinical training and specific objectives of the curriculum. The professional difficulties faced by the clinical pharmacists include lack of confidence to interact with other health care professionals (41.9%), poor professional management (32.3%) and difficulty in identifying the appropriate drug and dosage forms (19.4%). 24.2% had the opinion that they may avoid pursuing the Pharm.D. programme in India if they were starting all over again.   
Conclusion: The pharmacy schools should not conduct programmes only to make monetary benefits, but the prescribed quality standards shall be met completely without compromise. The assignment of setting up clinical pharmacy expertise in the nation may remain another unfulfilled dream, if screening, tuning in, and updating is not carried out at whatever point essential.
“Sign in to Speech” Smart Hand Glove for Especially Abled
Authors: Shah Shweta
Published: April 2022

More than 9 Crore people on the earth are facing the issue of dumbness. The communication between a dumb and normal person i.e. man or woman poses to be a crucial downside in comparison to verbal exchange among blind and historically visible human beings. The human who is facing the blindness can talk smoothly through normal human or regional language while the person facing the issue of dumbness have their own manual-visible language known as Sign or gesture using by the figures and hand language. Language is likewise a non-verbal Gesture that`s located amongst deaf groups at durations the planet. The languages have not been given a regular beginning and thence difficult to interpret. This challenge enables deaf and dumb people to which they speak with the not unusual place human beings easily. Sign languages are utilized by mute human beings as a medium of verbal exchange. Sign languages are used to deliver the mind with symbols, items, etc. They additionally deliver an aggregate of phrases and symbols (i.e. gestures). The gesture is a non-verbal shape of verbal exchange. Sign language reputation structures are used to transform signal language into textual content or speech to permit verbal exchange with those who do now no longer recognize those gestures. Usually, the focal point of those structures is to apprehend hand configurations along with position, orientation, and actions A the person facing the issue of dumbness can communicate with the normal people with the help of the device or gloves which can translate the hand or fingers gestures to sensible speech with the help of the converse used in the device. A gesture in accomplice diploma extraordinarily language is likewise a sure motion of the arms with a selected type created out of them. A posture alternatively is likewise a static form of the hand to cause an emblem. The main aim of these device is to translate the hand or figure movements of the deaf and dumb people to the language which can be understand by the normal people such as textual content and sensible or understandable voice. The interpreter uses a Gloves for the capturing the hand movements which consist of flex sensors, tool sensors which can be compared with the predefined hand movement’s data saved as the input signed language.
Kalman Filter Based Active Noise Control for Vibro-Acoustic Cavities
Authors:   Indian Institute of Technology, Jodhpur, INDIA, Puri Amrita , Modak Subodh ,   IIT Delhi, INDIA, Gupta Kshitij ,   IIT Delhi, INDIA
Published: April 2022

This paper explores use of the Kalman filter to estimate modal states in Modal Filtered-X LMS algorithm. Modal Filtered-x LMS (M FxLMS) algorithm is an adaptive algorithm, recently proposed by the authors, to minimize global acoustic potential energy of a vibro-acoustic cavity for reducing global level of noise in the cavity. For a weakly coupled vibro-acoustic cavity, global acoustic potential energy can be expressed as sum of squares of modal amplitudes of rigid walled acoustic modes of the cavity. Therefore, the algorithm was formulated to minimize sum of squares of modal amplitudes of the rigid walled acoustic modes. The M FxLMS algorithm turned out to be modal counterpart of the conventional FxLMS algorithm. In the conventional FxLMS algorithm, sum of squares of pressures at the location of microphones is minimized and hence, values of acoustic pressure at the location of error microphones and physical secondary path impulse responses are used. A physical secondary path impulse response represents the variation of acoustic pressure at location of error microphone when secondary source is driven by an impulse function. In the M FxLMS algorithm, sum of squares of modal amplitudes of some chosen acoustic modes is minimized and hence, values of modal amplitudes of the chosen acoustic modes and modal secondary path impulse responses are used. A modal secondary path impulse response represents the variation of modal amplitude of a particular acoustic mode when secondary source is driven by an impulse function. In the earlier study, modal amplitude of the acoustic modes are obtained using information of acoustic pressure at some discrete locations inside the cavity and information of the chosen acoustic mode shapes at those locations. In that approach, number of the acoustic pressure sensors must be adequately more than number of the acoustic modes contributing in desired frequency range. In a view of reducing number of the acoustic pressure sensors, this paper explores use of Kalman filter to estimate modal amplitudes of the acoustic modes. A modal model of the vibro-acoustic cavity is used in the formulation of Kalman filter for estimation of modal amplitudes of acoustic modes. A numerical study is carried out on the same irregular vibro-acoustic cavity which was used for the earlier study. An acoustic disturbance acting inside the cavity and a structural disturbance acting on the flexible surface of the cavity are considered. An acoustic control source is used as a secondary source. The study is carried out for three frequencies: a cavity controlled resonance, a panel controlled resonance and an off-resonance frequency. It is found that with the use of Kalman filter; only 6 microphones are required as against the 18 microphones required in the previous approach for the accurate estimation and then, control of modal amplitudes of first 12 acoustic modes.
The Lightweight Design of Anticollision Beam of 7075 Aluminum Alloy patch panel mixed with Corbon Fiber Reinforced Composites
Authors:   BAIC Motor Co.Ltd., CHINA, Liu Zhimin , Chen Leigang ,   BAIC Motor Co.Ltd., CHINA
Published: April 2022

With the wide application of aluminum alloy in the automotive field, and the reduction of the cost of carbon fibre, the application of aluminum alloy and carbon fibre hybrid materials has become an important direction of the future development of automotive materials. The development of friction stir welding technology makes the connection between different materials easy to realize. In addition, with the development of hot forming technology of ultra-high strength steel and the reduction of hot forming process cost, hot forming products of high-strength aluminum alloy represented by 7075 aluminum alloy began to be applied in automobile industry. As for the rear anti-collision beam, with the increase of energy absorption requirement for low-speed collision, extruded aluminum alloy has been widely applied in the middle and high-end automobiles due to its low process cost. However, due to the limitation of extrusion process, the flexibility of extruded aluminum design is poor, which is not conducive to further lightweight. Therefore, the hot forming technology of 7075 high strength aluminum alloy is considered to further optimize the rear anti-collision beam. Based on friction stir welding prepared for mixed materials, designed four kinds of structure anti-collision beams, which were respectively made of 340LA steel, 6082 extruded aluminum alloy, 7075 hot-forming aluminum alloy and 7075 hot-forming aluminum alloy which patched with carbon fibre reinforced composite (CFRP) plate were designed for one car. In addition, the energy absorption box is designed with several kinds of materials, which were medium-strength steel, extruded aluminum, stamped aluminum and carbon fibre composite respctively. Based on the crash simulation analysis using LS-DYNA, deformation nephogram and curves of maximum invasion of four kinds anti-collision beams were obtained The results of the intrusion of collider based on crash simulation in the rear low speed impact, indicated that four kinds of bumpers both met the collision requirements by optimizing the shape and size of the anti-collision beam and energy absorption box. Because of the creative using the technology of aluminum hot-forming, as well as friction stir welding of carbon fibre composite patch panel between aluminum plate, the weight of the anti-collision beam assembly was reduced from 4.82kg to 1.10kg, and the weight of this new anti-collision beam assembly mixed with 7075 aluminum and CFRP was 1.38 kg lighter than the 2.52 kg of 6082 extruded aluminum beam assembly. In addition, the results of energy absorption curves shown that the energy absorption box of the new anti-collision beam with has a higher energy absorption effect.
Generalized Averaged Gaussian Formulas for Certain Weight Functions
Authors:   Faculty of Mechanical Engineering, University of Belgrade,, MUTAVDŽIĆ RADA M.
Published: April 2022

In this paper we analyze the generalized averaged Gaussian quadrature formulas and the simplest truncated variant for one of them for some weight functions on the interval [0, 1] considered by Milovanović in [10]. We shall investigate internality of these formulas for the equivalents of the Jacobi polynomials on this interval and, in some special cases, show the existence of the Gauss-Kronrod quadrature formula. We also include some examples showing the corresponding error estimates for some non-classical orthogonal polynomials.
Dynamics and Hopf Bifurcation of a Chaotic Chemical Reaction Model
Authors:   University of Poonch Rawalako, Pakistan, Din Qamar
Published: April 2022

Taking into account an ideal mixture and a well-stirred reactor, some dynamical aspects for a 3-dimensional chaotic system are carried out. Positivity and boundedness of solutions are discussed. Equilibria are investigated and method of linearization is implemented for asymptotic behavior of system about these equilibria. Lyapunov function is constructed to prove the global stability of positive equilibrium point. Moreover, it is proved that system undergoes Hopf bifurcation about its interior (positive) equilibrium. An explicit criterion of Hopf bifurcation without finding the eigenvalues is used for the existence of Hopf bifurcation. Numerical simulation is presented for the illustration of theoretical discussion. Lyapunov dimension is approximated and maximum Lyapunov characteristic exponents are plotted to ensure the chaotic behavior of the model.
UTICAJ GENOTIPA I LOKALITETA NA SADRŽAJ OLOVA U STABLU PŠENICE U FAZI PUNE ZRELOSTI
Authors:   Institute of Tamis Pancevo in Pancevo, Sebia, Mickovski Stefanović Violeta , Stanisavljević Dragana , Bačić Jasmina
Published: April 2022

Heavy metals represent a very important group of environmental pollutants because they are potential metabolic inhibitors. A study was conducted to investigate the content of heavy metals (Pb) in the soil and their accumulation in the wheat tree - Triticum sp., in the phase of full maturity in four wheat varieties, to obtain information on the health of cultivated genotypes, and to determine which variety wheat is the least susceptible to lead accumulation. The concentration of lead was highest in the cultivars Renaissance and Apache.
UTICAJ INOKULACIJE NA KVALITET FERMENTACIJE I HEMIJSKI SASTAV SILAŽE LUCERKE
Authors:   Institute for Forage Crops Krusevac, Serbia, Lazarević Đorđe , Stevović Vladeta , Radović Jasmina , Tomić Dalibor , Marković Jordan , Prijović Mladen , Zornić Vladimir
Published: April 2022

In order to assess the impact of the inoculant "BioStabil Plus" on the ensiling process of alfalfa, the parameters of fermentation quality were analyzed (pH, acetic, butyric, lactic acid, ammonia and water-soluble nitrogen in total nitrogen) and chemical composition of silage (crude protein, crude cellulose, crude fats, nitrogen-free extractives and ash), as well as silage quality assessment (DLG and Zelter). Alfalfa biomass in the beginning of flowering phase was ensiled without additives and with the addition of inoculant. The addition of inoculant showed a decrease in pH, increased production of lactic acid, reduced production of acetic acid, with a favorable ratio of these acids (2-3: 1). The introduction of inoculants resulted in improved fermentation quality, which resulted in better preservation of nutrients, especially for crude proteins, since the use of inoculants also showed a decrease in ammonia nitrogen content compared to control (inoculation - 12.28% NH3-N/ΣN, control - 17.42% NH3-N/ΣN). The general conclusion is that inoculant should be added to alfalfa biomass, for the purpose of optimal production of lactic and acetic acid, as well as obtaining higher nutritional value.
Optimización del mecanismo de elevación de una cama robótica hospitalaria
Authors: Foster-Vázquez Ixhel Jhoselyn , Portillo-Vélez Rogelio de Jesús , Vázquez-Santacruz Eduardo Filemón
Published: April 2022

El CamaBot es una cama de hospital robótica compuesta por cuatro mecanismos básicos (soporte del colchón, mecanismo de giro, respaldo y mecanismo de elevación). El mecanismo de elevación consta de dos sistemas de deslizamiento de manivela (MC) que juntos forman un sistema cinemático de seis barras. El problema que existe en el mecanismo de elevación es que debido a la fuerza que ejercen los actuadores sobre las correderas, los apoyos y juntas del mecanismo de elevación, el mecanismo presenta fallas mecánicas por desgarro en las uniones soldadas. Para resolver la problemática presentada en este artículo, se usó una técnica de optimización numérica basada en algoritmos genéticos utilizando el Matlab® Genetic Algorithm ToolBox, para optimizar la geometría del mecanismo de elevación de CamaBot, minimizando la fuerza ejercida por los actuadores para solucionar el problema de desgarro en las uniones soldadas.
A free application engineering economics developed in C++ to improve the teaching process in distance learning
Authors: Zanardini Ricardo Alexandre Deckmann , Forte Luiz Antônio , De Paula Alessandra , Ripka Cristiane Adriana , Dos Santos Kellen Coelho
Published: April 2022

The present work was developed in a high education institution of Brazil. Because to the difficulty of many students of the superior technology in Indus-trial Production Management in the study of the discipline of Computer Science where the main objective is to learn computer programming, we chose to work together with the discipline of Engineering Economics to motivate and help in understanding concepts related to the C++ language as well as to promote improvements in the programming steps. Each team of 4 or 5 students developed an application that has the main tools of Engineering Economics and, for social purposes, these students provided free share the respective applications and posted the link in social networks. It was observed that there was a 44.83% improvement in the performance of the students in the course evaluations after their participation in the project. It was also possible to observe the good acceptance on the part of the users regarding the applications developed and shared free.
Tough Talk vs Tough Action* Policymaking and information in the post-Covid era
Authors: Ortu Laura , Solinas Simona , Solinas Tonito
Published: April 2022

Following the mid-2017 inbound migration peak of third countries’ nationals in Italy, the then Italian Minister of the Interior Marco Minniti signed a Memorandum of Understanding, with the purpose to curb illegal immigration and “liberate our lands from traffickers”. The MoU marked the first step towards a stricter set of national regulations, intensified by the succeeding Minister of Interior Matteo Salvini, and adjusted by the current Minister Luciana Lamorgese. The fight against human trafficking shape the political agenda and steer Italy’s public opinion, deepening the gap between those who support the pushback of migrants, on one side, and those who advocate compliance to regulations and treaties, not to mention the respect of human rights. Empirical evidence shows that adopted policies have at least partly achieved their objectives, discouraging irregular migration to a certain extent, but at the expense of migrants’ living conditions and their perception by national citizens. The paper provides an overview of the policy instruments deployed by the Italian Government to control the irregular migration wave, and what kind of resistance policymakers have had to confront during the implementation phase from the press and the public opinion. A section of the paper is dedicated to the importance of, and the need for, fair and truthful communication: fact-checking and debunking fake news are presented as necessary tools to inform and guide policymaking in the post-Covid era.
ПАРРАНДАЛАРНИ ОЗИҚЛАНТИРИШДА ВА РИВОЖЛАНИШИДА ОЗУҚАВИЙ ҚЎШИМЧА СИФАТИДА ГИДРОЛИТИК ФАОЛ ФЕРМЕНТЛАРНИНГ САМАРАДОРЛИГИ
Authors: To‘laganova Zilola Kamoliddin qizi.
Published: April 2022

Ушбу мақолада тухум йўналишидаги Ломан кросси хўрозчаларини парваришлаш ва озиқлантириш тўғрисида сўз боради. Бунда озуқасига қўшимча сифатида фаол ферментаралардан фойдаланилди ва паррандалар ўсишига таъсири ўрганилди.
Prevalence and causes of ENT diseases evidence in Pakistan
Authors:   MO at RHC 96/12 L Tehsil Chicha watni, Mukhtar Dr. Hamza
Published: April 2022

Background: ENT infections are becoming a common issue for the people around the globe. this study aims to explain the prevalence of ENT issues during January to November 2020 in south of Saudi Arabia. Methods: Author employed the simplified frequency approach for case management and demography moreover the prevalence of ENT issues in general and ear, nose, and throat. This study is based on quantitative approach where data is being gathered through primary sources. Results: Findings of the research confirm that roat infections are more common than of ear and nose moreover the prevalence of ENT issues are at higher rate that is around 54%. There are four main reasons which often causes ENT problems. Conclusion: Results of this study are very much significant for general doctors, ENT specialist and clinical staff.
Role of Aqueous Bark Extract of Terminalia Arjuna on Serum Enzymes in Cigarette Smoke Exposed Rats
Authors:   Department of Zoology, M.M.H. College, CCS University, Meerut, Singh Rajni
Published: April 2022

Cigarette smoking is the leading cause of mortality and a major public concern. The aim of our study to investigate the role of aqueous bark extract of Terminalia arjuna on serum enzymes in cigarette smoke exposed rats. A total fifteen (15) adult healthy Wistar rats from 100-158 were divided into three groups (A, B and C) each containing five rats. Group (A) serving as control without exposure to cigarette smoke, Group (B) and (C) served as the experimental groups. The group (B) was exposed to Cigarette smoke (6 Cigarettes) for one hour/day for 30 days and experimental group (C) was exposed to cigarette smoke along with oral administration of aqueous bark extract of Terminalia arjuna (5mg/rat /day) for 30 days. The results indicate that, a significant increase in Alanine amino transferase (ALT) and Aspartate amino transferase (AST) after exposure to cigarette smoke in comparison to control group while, a significant decrease in ALT and AST level after cigarette smoke exposure along with oral administration of aqueous bank extract of Terminalia arjuna in comparison to Cigarette smoke exposed rats due to antioxidant defence mechanism.
Difficulties in Writing Skill of Master of Business Administration at Tay Do University, in Vietnam
Authors:   Tay Do University, Vietnam, Nguyen Nga H. T
Published: April 2022

The study “Difficulties in writing skill of Master of Business Administration at Tay Do University, in Vietnam” was conducted to examine the reasons why learners met the difficulties in writing. Especially, it investigated the difficulties and aimed to help learners overcome the difficulties relating to writing. Three instruments were employed to collect data. First, 50 participants in three classes - Master of Business Administration - course 8 and 9 responded 10 questionnaires with 21 closed statements. Second, 10 out of participants were invited randomly in these classes to conduct a paper interview to supply more information to make clear and prove the difficulties that learners had in writing essays. The data were analyzed by using descriptive approach. Moreover, this research gave a clear and specific view about difficulties in writing faced by Master of Business Administration at Tay Do University.
Basic Contents of Vietnam - China Relation in the Period of 1945 – 1975
Authors:   Ex-Director Vietnam Communist Party History Institute, Ho Chi Minh National Academy of Politics, Vietnam, Manh Ha Associate Professor Dr. Nguyen
Published: April 2022

On January 15, 1950, the Government of the Democratic Republic of Vietnam issued a proclamation recognizing the People's Republic of China. Three days later, on January 18, 1950, the Government of the People's Republic of China issued a Declaration recognizing the Government of the Democratic Republic of Vietnam headed by President Ho Chi Minh. This event opened the especially important period in the diplomatic relations of the two countries. Over the past 70 years, although there have been ups and downs, but basically, the relationship between the two countries is pure, positive, respectful, supportive and beneficial to each other on the basis of common ideology. This study highlights the outstanding features of Vietnam - China relations in the period 1945-1975, when the two countries waged revolutionary wars, fought against aggression, defended national independence and built a socialist society.
Legal Protection for Workers on Pension Plan Policy
Authors:   Magister of Law, Universitas Diponegoro, Syamsudin Dita Tintistyowati
Published: April 2022

Objective: to find out legal protection for workers over the polemic of the Minister of Manpower Regulation Number 2 of 2022 regarding the Pension Plan (Jaminan Hari Tua – JHT) which is considered legally flawed. Methodology: research was normative research that used a statutory approach, which examined problems using legal regulations in the form of legal regulations. The analysis used a qualitative method with the discussion used library research. Findings: Based on Ministerial Regulation Number 2 of 2022, JHT benefits will be paid when the participant reaches the age of 56 years. JHT benefits can still be enjoyed by participants who have been laid off, as long as the contribution period has reached 10 years. The benefits provided include 30% of JHT for homeownership or 10% for other purposes in cash. The rest of the benefits are taken at the age of 56 years. This scheme protects so that in old age workers still have funds to meet their daily needs. If all of them are taken, then the purpose of JHT protection will not be achieved, because the real objective of JHT is for protecting workers or laborers in their old age.
Does More Educated Mean More Productive? Assessing the Effect of Education Level on the Productivity of Sample of Iraqi Farmers
Authors:   Faculty member in Imam Al- Kadhum College, University District, Kut, Wasit, 52001, Iraq, Abeb Hussein Bresam
Published: April 2022

This study aims to know if it is worth investing in tomato farmers’ education in Iraq. Two-stage analyses of the Data Envelopment Approach were used. In the first stage, scores of technical efficiency were obtained. In the next one, technical efficiency scores were regressed, using Tobit analysis, on educational factors to understand which factor can affect education. Data used in this study ranged from 1991 to 2016 and they were obtained from the FAO website. Results of the first stage showed that there is room for improving technical efficiency or increasing tomato output keeping the level of input the same. The second stage analysis showed that investing in increasing the basic education level of females can increase technical efficiency and eventually the output of tomatoes.
The Role of Tri Hita Karana Culture as Moderating the Effect of Competence on Business Performance through Competitive Advantage
Authors:   Student Of Magister Manajement Program on Faculty of Business and Tourism Economics, University Hindu Indonesia, Indonesia, Jl. Sangalangit, Penatih, Kec. Denpasar Timur, Kota Denpasar, Bali 80238, Ariani I Putu Desi
Published: April 2022

Performance is an important factor in the survival of MSME actors. The small business sector in Bali is in dire need of continuous performance so that the welfare of business actors can be sustainable. Culture is the thing that distinguishes each region in carrying out its business ethics, by adhering to culture, a sector that is solid in maintaining a green environment, human relations and God. This study wants to examine the moderating role of Local Wisdom (Tri Hita Karana) on Competence and Business Performance of small businesses. Quantitative method is used with purposive sampling technique of 86 samples from the Slovin formula. Moderation Local wisdom provides a competency boost to performance. The existence of caring for the environment, others and adhering to God's teachings, norms and responsibilities become greater.
UNIVERSITY STUDENTS’ ASSESSMENT OF GENERAL ENGLISH SUBJECT
Authors: Yati Par , Affini Laily Nur
Published: April 2022

This study analyzed students’ final test in English for General subject, including the students’ overall scores, understanding the essay instruction, and grammar mistakes found in their essay. This research was conducted using a qualitative descriptive method. The researchers employed document analysis to find related information from the research objectives naturally. The instrument used for the data collection was the students’ answer sheets from the final test, and a summative test was employed as the approach. There were fifty students of non-English Department Study Programs as the participants. The scores achieved conclude that the mean score achieved by the students is in the lowest category. It implies that they still need to improve their writing, such as sentence arrangement, grammar, and vocabulary selection. Furthermore, most students were mistaken in understanding the essay instruction and resulted in incorrect essays.