bluuebunny/crossref_metadata_2025 huggingface dataset:
Spatial-temporal distribution of the black rhino population in the Ngorongoro Crater, Tanzania
Authors: Gadiye Donatus , W. Eshiamwatta George , O.  Odadi Wilfred
Published: February 2021

Ngorongoro Conservation Area (NCA) is vital especially for black rhino conservation because it is one of the only two ecosystems in Tanzania that host native black rhino populations. However, the spatial-temporal distribution of rhinos in this ecosystem have not been assessed. The purpose of this study was to assess the temporal and spatial distribution of rhinos and factors responsible for the uneven seasonal distribution. The study was conducted in Ngorongoro Conservation Area (NCA) which is located at 3Â°12â€²S, 35Â°27â€²E during the wet (May-June 2015) and dry (August-September 2015) sampling periods. Road drives were conducted daily for a period of one month during each season to map the spatial distribution of the black rhino, and assess the relative abundance of its forage resources and diet selection. During each drive, the roadsides were inspected for the presence of rhinos, with stops being made each time an individual or group of rhinos is located. Results shows that the distribution patterns of the black rhino differed markedly between wet and dry sampling periods. During the dry period, rhinos were mainly concentrated in the crater slopes dominated by shrubby vegetation, swamps and along riverine areas of the crater. During wet season in there were more herbage material mostly preferred by black rhino in crater floor as most rhinos were sighted in these sampling areas. Human activities such as tourism infrastructure (lodges, campsites and roads) should be kept minimal to minimize disruption to rhino movement and habitat selection patterns and buffer zones be established within crater-community interfaces where human activities such as livestock grazing are strictly prohibited to ensure natural distribution ranges are maintained.
MicroRNAs: new biomarker for diagnosis, prognosis, therapy prediction and therapeutic tools for acute lymphoblastic leukemia
Authors: A Gobran M. Sc Eman , NasrM Nasr PhD Ghada , Y Nasr PhD Mohamed , I Nasr PhD Mahmoud
Published: February 2021

Back ground: MicroRNA (miRNA) was originally discovered in Caenorhabditis elegans by Victor Ambrose in 1993. It was predicted that miRNA account for 1-6% of the human genome and regulated at least 33% of protein-coding genes. Recently, 945 distinct miRNAs molecules have been identified within the human genome. It has been associated with the pathogenesis, progression and prognosis of different diseases, such as leukemia. MiR-181 family is one of those miRNA families, which generally expressed in 70 species and various human cancers.Objective: Assessment of mir-181a and LDH as promising co-biomarkers in order to provide additional information influence decisions about treatment sequentially to improve health outcomes of ALL in the Egyptian children.Patients and methods: This study was conducted on 100 children; 50 with ALL (38 males and 12 females) as ALL group. Other 50 healthy age and sex matched children were collected randomly as control group. Serum lactate dehydrogenase (LDH) and miRNA-181a were evaluated for all participants.Results: The results showed that there was a statistical significant difference between ALL and control groups regarding both molecular and biochemical indications of mir-181a and LDH were about almost five time as the control value, (P = 0.001). The ROC curve analysis revealed that the studied LDH and mir-181a markers were highly sensitive, highly specific and highly accurate test in the differentiation between the two studied ALL and control groups, with cutoff: ALL if mir-181a > 2.071, ALL if LDH > 0.307 respectively.Conclusion: MiRNA-181a and LDH can be used as co-biomarkers for ALL and might be beneficial in early diagnosis.Â Â
Comparing Fuzzy rule-based and fractional Open Circuit Voltage MPPT techniques in a fuel cell stack
Authors: N. Luta Doudou , K. Raji Atanda
Published: February 2021

The concept of power tracking was at first applied to renewable power systems and especially those based on solar and wind to extract as much power as possible from them. Both types of power systems operate on the principle of converting either solar or wind into electricity. Thus, their output power is direct dependent on the solar radiation for solar power systems and on the wind speed for wind generators. To maintain efficient system operations, the output power of these power systems is optimized through maximum power tracking techniques. In the similar vein, fuel cell stacks display nonlinear output powers resulting from internal limitations and operating parameters such as tem-perature, hydrogen and oxygen partial pressures and humidity levels, etc., leading to a reduced system performance. It is critical to extract as much power as possible from the stack, thus, to prevent also an excessive fuel use. To ensure that, the power converter interfaced to the stack must be able to self-adjust its parameters continuously, hence modifying its voltage and current depending upon the maximum power point position. Diverse techniques are utilized to extract maximum power from the fuel-cell stack.  In this paper, a fractional open circuit voltage and fuzzy rule based maximum power tracking techniques are considered and compared. The proposed system consists of a 50 kW Proton Exchange Membrane fuel cell interfaced to a DC-to-DC boost converter. The converter is designed to deliver 1.2 kV from 625 V input voltage. The simulation is carried out under Matlab/Simulink environment.
Development of a speech controlled water tap and fan system using linear predictive coefficient for feature extraction
Authors: S. Okomba Nnamdi , O. Esan Adebimpe , Omodunbi Bolaji , A. Adeyanju Ibrahim , A. Bashir Sulaimon
Published: February 2021

Automatic device control is of great assistance in different electronic application areas that will aid human endeavors. Traditionally, fan and water pump system used in many homes are controlled by using manual process. This is a time consuming and difficult procedure, for the elderly, and handicap persons. In this view, this paper presents a microcontroller based fan and water pump control system using speech recognition. The system has a PIC16F628A microcontroller activated by a speech recognizer, then triggers control to a DC motor which set the water tap or the fan in motion. The Spoken words chosen for recognition are ON and OFF and the speech samples were extracted with Linear Predictive Coefficient (LPC) Feature extraction technique and after experimenting with the developed system, the result indicates the device is of good performance. We intend to increase the complexity of this work by adding specific sensors that will automatically switch off the fan at specified room temperature, and turn off the water tap at the fill of a container.Â Â
Development and thermal modeling of an induction machine
Authors: Stephen Ejiofor Oti , Justin Ugwu , Damian Benneth Nnadi , Uche Ogbuefi
Published: February 2021

In induction machines, the major concern is the temperature rise since it determines the maximum loading, in an attempt to avoid insula-tion deterioration and eventual loss of motor life. The effect of excessive heat in the motor stator and rotor windings and the stator mag-netic circuit can degrade the developed performance of the machine and also affect the motor loading and life span if not dispensed properly. This research work examines the thermal model for estimating the stator and rotor temperatures in cage induction motor. A state-variable model of the induction is used. The twin-axis stator reference frame is used to model the motorâ€™s electrical behavior, because physical measurements are made in this reference frame. The thermal model is derived by considering the power dissipation, heat transfer and rate of temperature rise in the stator and rotor. The non-linear equations for electrical behavior of the motor and the thermal state equations for the stator and the rotor are solved using the MATLAB/Simulink blocks. This is to give room for the determination of the temperature of the stator and rotor windings inside the induction machine so as to evaluate the thermal stability of the induction motor and to check whether the insulation of the copper windings is sufficient at different operating conditions. It was found out from the thermal model analysis that the temperature of the stator and rotor windings increases due to stator and rotor copper losses which depend on the stator current. As the stator current is increased by increasing the torque, the temperature of each element is consequentially made to increase.Â Â
Scenario development for improving supply chain performance using the system dynamics approach
Authors: Santoso Imam , Sa'adah Miftahus , Asmaul Mustaniroh Siti
Published: February 2021

Supply chain management integrates the entire business process of a product from upstream to downstream with the aim of delivering products to consumers in a timely manner and precise quantity without overriding profit. The application of dynamics systems is aimed to provide a holistic view of the system and to identify how interrelationship affects the system as a whole. System dynamics approach is used to analyze the efforts to improve performance. Besides being used as an analysis related to the model, system dynamics can also be used to formulate effective policy related to the profit distribution in case study of bell pepper supply chain. In this study, several scenarios were used as references to improve bell pepper supply chain performance in Regency X. The stake holders in the supply chain were farmer, middleman, and wholesaler. There were three sub-models used in system dynamics, namely the sub-model farmer, middleman, and wholesaler. The model in the system dynamics was then developed to find out the best scenario in improving the performance of bell pepper supply chain. The scenario developed consisted of 4 scenarios in which scenario 1 became the basic scenario as the comparison of simulation results. Then, Scenario 2 was a Supply-Demand arrangement to reduce losses obtained at the level of middleman and wholesaler. The policy of Scenario 3 was warehouse procurement, which was a model improvement scenario in Scenario 3. Lastly, Scenario 4 was an increase in the level of demand / market expansion without an increase in the number of production. The highest total supply chain profit from the four scenarios was in Scenario 3, while the lowest was Scenario 2.
Steel rebar categories data and statistical properties of Nigerian reinforcement used for structural strength
Authors: Ehizemhen Igibah Christopher , Omolayo Agashua Lucia , Abubakar Sadiq Adavudi
Published: February 2021

The paper was aimed at evaluating effect of cost prices of reinforcement on its strength since dispersal in the size geometry of locally available and imported bars is very essential to the development of stable standard of practice for both civil and building engineering sector. Steel rebar from some locations in Lagos state, Nigeria was obtained so as to determine its cost price and strength. The results disclosed that both yield and ultimate loads of 45.67 and 65.54% respectively, as regards to flexural strength, Ogba reinforcement is the highest.
Analysis of installation of ducted propeller (kort nozzle) on cargo ship after maintenance
Authors: Oktovianus Bura Romie , Nengah Putra Apriyanto I , Dwi Susanto Arica
Published: February 2021

The country of Indonesia is a country of export and import of international trade goods. A cargo ship is a type of ship that carries cargo from one port to another. To meet the needs of international trade must carry out various patterns of ship maintenance by carrying out maintenance. The problem is that conventional propellers are currently installed, at high rotations there can be cavitation of air bubbles around the propeller which decreases propeller efficiency. To improve the conditions above, a Ducted Propeller was installed. From the matching calculations that have been done, the propeller that suits the needs of the ship is a Ka 3.65 type using a ducted propeller. By using a Ka 3.65 type propeller. The power needed is 2239.99 kW the efficiency that can be achieved is 55%, sfoc 214 g / kW, and the speed of the ship will be 16.09 knots at 100% rotation of the propeller, and at 85% the power needed 1375.84 kW, sfoc 214 g / kW, speed reaches 9.88 knots. The difference in speed between conventional blades with type B 4.55 with type Ka 3.65 that uses a cort nozzle is 16.09 knots-13.05 knots = 3.04 knots. Or you can experience a speed increase of (3.04 / 13.05) x100 = 23.29.Â
White whole (WW) grades cashew kernelâ€™s classification using artificial neural network (ANN)
Authors: VG Narendra , K Shetty Dasharathraj
Published: February 2021

In this paper, we introduce an algorithm for the fitting of bounding rectangle to a closed region of cashew kernel in a given image. We propose an algorithm to automatically compute the coordinates of the vertices closed form solution. Which is based on coordinate geometry and uses the boundary points of regions. The algorithm also computes directions of major and minor axis using least-square approach to compute the orientation of the given cashew kernel. More promising results were obtained by extracting shape features of a cashew kernel, it is proved that these features may predominantly use to make the better distinction of cashew kernels of different grades. The intelligent model was designed using Artificial Neural Network (ANN). The model was trained and tested using Back-Propagation learning algorithm and obtained classification accuracy of 89.74%.Â
Effect of usage on the fatty acid composition and properties of neat palm oil, waste palm oil, and waste palm oil methyl ester
Authors: Omojola Awogbemi , Freddie Inambao , Emmanuel Idoko Onuh
Published: February 2021

The need to find an environmentally friendly, renewable, and biodegradable fuel to reduce the growing dependence on fossil fuels and its attendant performance and emission inadequacies has increased research in biodiesel. Due to its low cost, availability, and a veritable means of waste disposal, waste vegetable oil from restaurants, waste fats from slaughterhouses, grease from wastewater treatment plants has gained prominence as biodiesel feedstock. This present effort compares the properties and fatty acid (FA) composition of neat palm oil (NPO), waste palm oil (WPO), and waste palm oil methyl ester (WPOME). WPO used to fry fish and chips (WPOFC), and waste palm oil used to fry sausage and chips (WPOSC) were collected at the point of disposal. The WPOFC and WPOSC were converted to WPOMEFC and WPOMESC, respectively, by transesterification and subjected to property determination and gas chromatography-mass spectrometer analysis. The characterization showed that the ratio of saturated FA to unsaturated FA changed from 19.64 %:80.36 % for NPO, to 37.67 %:62.33 % for WPOFC, 54.75 %:45.25 % for WPOSC, 30.43 %:69.58 % for WPOMEFC and 16.2 %:83.8 % for WPOMESC. These outcomes can be attributed to the effect of repeated heating and cooling during frying, contamination from moisture, food fried, and the transesterification reaction.Â Â
Analysis influence factors of domination, competency and interpersonal skill in the stakeholder interaction to infrastructure project success
Authors: Bayuaji Sanggoro Heru , Widyaningsih Nunung , P. K. Bintoro Bambang
Published: February 2021

Project is picture of interaction model from various interests in social communication among the stakeholders. Stakeholders interaction factors can be influenced by domination and competencies beside their interpersonal skills. This research based on samples of respondents from East Java and West Sumatra provinces, Indonesia, which have similar social behavior and socio-cultural strength. Subject of research focused on three main projectâ€™s stakeholders, which will be analyzed by partial least square-structural equation model (PLS-SEM). The result of analysis shows that domination factor has the greatest influence to infrastructures project implementation. It means that influence of feudalism cultural heritage remain affecting to local people character and work culture. However, respondents from East Java consider competency as a significant variable which influences the infrastructure project success. West Sumatera respondents are the opposite, where competency is not a significant variable to the project success directly. Meanwhile, interpersonal skill can be good mediation variable for domination and competency to the project success in the West Sumatra, but it is not good enough to mediate domination to project success in the East Java. Thus, it can be concluded that West Sumatra respondents have a more feudal interaction style than stakeholders in East Java.Â Â
Industrial revolution 4.0 and the development of accounting information system: an imaginary dialogue
Authors: Ganis Sukoharsono Eko
Published: February 2021

The paper is an imaginary dialogue on industrial revolution 4.0 (IR4.0) and the development of accounting information system. It explicates a thought of changing on accounting information system in the era of industry 4.0. The imaginary dialogue is between Accountant and Industrialist, both are concerned on the movement of industry 4.0 and accounting information system approach. Its aim is to explore the connection between IR4.0 and the development of AIS. IR4.0 characterized by Interoperability, Virtualization, Decentralization, Real Time Capability, Service Orientation, and Modularity significantly contributes the accuracy and timeliness of accounting information and the quality of AIS.Â Â
Novel approach for anti-collision planning optimization in directional wells
Authors: Mohamed Abdulrahman
Published: February 2021

One of the most application of the directional drilling is drilling multiple wells from one location or platform. In drilling multiple wells from one location the major problem that faced is avoiding the collision with the offset wells that drilled near the proposed well in the same region. Therefore, the Potential of Collison between the wells can cause severe catastrophic accidents such as an explosion or oil spill. Several measurements of proximity calculation or methods have been adopted to control the distance between the wells, avoid the Collison, increas-ing the clearance along with smoothing the trajectory, Reducing the drilling time based on the anti-collision rules. A real case study of an offshore directional horizontal well drilled from the platform is studied through the paper. The proposed well is drilled in the neighboring of three Offset wells that should be Planned completely to avoid the Collison with them. The well is planned through an advanced anti-collision method that results in preventing the collision of well with optimized drilling performance through Oriented separation factor (OSF). This factor yields appropriate separation with OSF greater than 5. This yield efficient separation with offset well 1, offset well 2 and offset well 3 greater thant5, In addition to optimized drilling performance of 84% drilling versus 16% sliding that results in the completion of the well in 50 days with positive income that result in 8.55 Return on Investment (ROI).Â Â Â
Security of cloud computing: belongings for the generations
Authors: Jabbar Jahangir , Mehmood Hussain , Malik Hassaan
Published: February 2021

Cloud computing plays an important role in Information Technology (IT) management. Consequently, various cloud computing developers and users experience different benefits and similarly challenges to its use and potential opportunities in driving the Fourth Industrial Revolution. Despite the increasing benefits of cloud computing, including increased speed of data processing and reduced costs compared to traditional computing, issues of security and privacy risk remain one of the greatest concerns in cloud computing. Through a systematic literature review, the evolution and developments in technology and issues of security and privacy from many years are examined to establish the trends in the threats; and thereby, provides a projection on the future of security of cloud computing. This paper presents the cloud computing aspects (types/aspects, and categories such as Infrastructure as a Service (IaaS), Platform as a Service (PaaS) and Software as a Service (SaaS). The paper dwells on the challenges of cloud computing going into the future with some solutions that have potential to work.Â Â Â
Working process of TU 3a CNC frais machine using software system
Authors: J Junaidi
Published: February 2021

This workpiece process is: to find out how to transfer images from Auto CAD software to the Q plus CELL Milling Cnc software, and to find out how to transfer programs from the CNC Milling QELL KELLER software to the TU 3A CNC milling machine. The making of this workpiece uses three main media, namely Auto CAD 2000 software, CNC Milling KELLER Q plus software, and TU 3A CNC milling machine. The process of making the workpiece starts from making the workpiece design in Auto CAD software which is then stored on the CDR via DFX data. The design of the workpiece contained in the CDR is then transferred to CNC Millling KELLER Q plus software via Geometry. in Geometry, the design of the workpiece is dimensioned. Completed from the Geometry the workpiece design is included in the Work plan to be processed so that it can be simulated to move to a CNC program to convert the graphical language into a numeric language so that it can be read by a CNC machine. The programming results from the CNC KELLER Q plus software are then recorded to be executed on the CNC TU 3A milling machine to obtain the workpiece in accordance with the design in AutoCAD. Programming results from CNC Milling KELLER Q plus software cannot be directly used on the TU 3A milling machine (EMCO), because the programming language used is different. Programming language in CNC Milling KELLER Q plus software uses the DIN 66025 standard, while the CNC TU 3A (EMCO) milling machine uses ISO standards, so it needs to be converted first.
Breast cancer detection using thermal images
Authors: M. Reda Hawas Amany , Twakol Khalil Abeer , Said Marzouk El
Published: February 2021

Breast cancer is a common disease, accurate and early detection of breast cancer is very important to reduce the mortality and morbidity. Previous studies expose that thermography is a good tool for early detection of the breast cancer. In this paper, a new automatic system will be introduced for the early detection of the breast cancer using thermal images and distinguishing between normal and abnormal breasts. The proposed system is based on combining textural features and histogram of oriented gradients and bag of thermal breast images and then classifying those using three different classifiers: (i) Support vector machine; (ii) Decision tree, and k-Nearest Neighbor. This proposed system provides an automatic classification of the breast cancer using image analysis accurately in low elapsed time. Experimental results showed that cubic SVM has a maximum accuracy of 98.9%, a sensitivity of 98.9%, and a specificity of 99%. When comparing the proposed system with the relevant systems, itâ€™s approved to be more accurate with low elapsed time in learning and testing phase that can help the clinicians in the automatic diagnosis of the breast cancer.Â Â Â
Thermal performance for electromagnetohydrodynamic flow of non-Newtonian Casson fluid through porous microtube
Authors: Reza Motahar , Rana Amalendu , Patra Raghunath
Published: February 2021

A theoretical investigation is done to analyze the heat transfer features of non-Newtonian Casson fluid in a porous microtube with electro kinetic effects associated with the applied magnetic field. The exact analytical solutions the velocity and temperature profiles of non-Newtonian Casson fluid in porous micro-tube related to combining effects of electromagnetohydrodynamics forces and electrokinetic forces have been obtained using a variation of parameter. Temperature and flow distribution characteristics of Casson fluid flow are controlled by the obtruded pressure-gradients, applied a magnetic field and electro-kinetic forces. The exciting features of the electromagnetohydrodynamics flow along with the features of the heat flow rate are examined by variation in the non-dimensional physical arguments on velocity and temperature functions. The effect of the Casson parameter on the velocity and temperature profiles has been investigated analyzed. The fluid flow rate and the heat transfer rate of Casson fluid within porous micro-tube is controlled by the strength applied electric and magnetic field.Â
Network architecture of internet backhaul by DVB-RCS standards for shipborne and other mobile applications
Authors: Stojce Ilcev Dimov
Published: February 2021

In this paper is introduced a new Digital Video Broadcasting-Return Channel via Satellite (DVB-RCS) for the implementation of modern satellite Internet for shipborne, Vehicleborne and airborne mobile applications via Geostationary Erath Orbit (GEO) satellites. Mobile Satellite Internet aims at providing the next generation satellite broadcasting service through C, Ku and Ka-band DVB-S2 standard for Mobile Earth Stations (MES) via GEO satellite and Land Earth Stations (LES) to the ground or other mobile subscribers. It is de facto a mobile interactive broadcast satellite access system, which provides both TV broadcasting and high-speed Internet broadband based on DVB-S/DVB-RCS standards, Internet Protocol (IP) network, World Wide Web, IPTV, E-solutions and Communication, Navigation and Surveillance (CNS) systems to the passengers and crews onboard ships, land and aeronautical vehicles.Â Â
Emerging network architecture of ultrafast fixed broadband technologies and solutions
Authors: Stojce Ilcev Dimov
Published: February 2021

This article is introducing the development and emerging network architecture of the newest ultrafast fixed broadband (BB) technologies and solutions in the terrestrial telecommunication industries right across the globe. The modern ultrafast networks and access technologies are known as G.fast, Data Over Cable Service Interface Specification 3.1 (DOCSIS 3.1), and Gigabit Passive Optical Networks (GPON). The basic concepts associated with broadband communication network technologies with emphasis on the provision of multipurpose service focused on the evolution and challenging fields of the broadband communication techniques from the traditional architecture to the incorporation of virtualization services here are also discussed.Â
Path Planning for Indoor UAV Using A* and Late Acceptance Hill Climbing Algorithms Utilizing Probabilistic Roadmap
Authors: Hopkins Jacob , Joy Forrest , Sheta Alaa , Turabieh Hamza , Kar Dulal
Published: February 2021

The main objective of an unmanned aerial vehicle (UAV) path planning is to generate a flight path that links a start point to an endpoint in an indoor space avoiding obstacles.Â  Path planning is essential for many real-life applications such as an autonomous car, surveillance mission, farming robots, unmanned aerial vehicles package delivery, space exploration, and many others. To create an optimal path, we need to adopt a specific criterion to minimize the distance the UAV must travel such as the Euclidean distance. In this paper, we provide our initial idea of creating an optimal path for indoor UAV using both A* and the Late Acceptance Hill Climbing (LAHC) algorithms. We are adopting an indoor search environment with various complexity and utilize the Probabilistic Roadmap algorithm (PRM) as a search space for both algorithms. The basic idea following PRM is to generate random sample points in the space and search these points for an optimal path. The developed results show that the LAHC algorithm outperforms the A* algorithm.
Material comparison of dynamic cornering fatigue test (iso3006) for automotive wheel rim
Authors: Bagherzadeh Faramarz , Murugesan Sundeep , Deka Priyam
Published: February 2021

With the technological advancement in the automotive sector, the vehicles are crossing their limits in every aspect. Hence, the subsequent improvement related to the wheel and braking of the vehicle is very crucial as the wheel carries the whole weight of the vehicle in dynamic and harsh environmental conditions. ISO-3006 is a comprehensive test for wheel standardization, and the dynamic cornering fatigue test is a part of this standard. This test investigates the wheel fatigue under bending torque. When a car turns, the bending moment is applied to the wheel via drive axle. In this paper, we investigate the test on a designed wheel with five different materials via ANSYS software. As the wheel weight has a direct impact on vehicle performance, selecting lighter materials is extremely important. The result of this research indi-cates the area of maximum fatigue stresses, and also it provides a comparison between five popular materials for the wheel rim considering the fatigue life and weight of the wheel. Finally, it is shown that carbon fiber reinforced plastic (CFRP) has the most fatigue strength con-cerning its lightweight.
New temperature dependent models for estimating global solar radiation across the midland climatic zone of Nigeria
Authors: O. Akpootu Davidson , I. Tijjani Bello , M. Gana Usman
Published: February 2021

Authentic information of the availability of global solar radiation is significant to agro/hydro meteorologists, atmospheric Physicists and solar energy engineers for the purpose of local and international marketing, designs and manufacturing of solar equipment. In this study, five new proposed temperature dependent models were evaluated using measured monthly average daily global solar radiation, maximum and minimum temperature meteorological data during the period of thirty one years (1980-2010). The new models were compared with three existing temperature dependent models (Chen et al., Hargreaves and Samani and Garcia) using seven different statistical validation indicators of coefficient of determination (R2), Mean Bias Error (MBE), Root Mean Square Error (RMSE), Mean Percentage Error (MPE), t â€“ test, Nash â€“ Sutcliffe Equation (NSE) and Index of Agreement (IA) to ascertain the suitability of global solar radiation estimation in five different locations (Zaria, Bauchi, Jos, Minna and Yola) situated in the Midland climatic zone of Nigeria. In each location, the result shows that a new empirical regression model was found more accurate when compared to the existing models and are therefore recommended for estimating global solar radiation in the location and regions with similar climatic information where only temperature data are available. The evaluated existing Hargreaves and Samani and Garcia temperature based models for Jos were compared to those available in literature and was found more suitable for estimating global solar radiation for the location. The comparison between the measured and estimated temperature dependent models depicts slight overestimation and underestimation in some months with good fitting in the studied locations. However, the recommended models give the best fitting.Â Â Â
Soliton solutions of coupled higgs field equation via the trial equation method
Authors: Subhaschandra Singh S.
Published: February 2021

Since a few recent decades, investigation of nonlinear evolution equations (NLEEs) is becoming an important area of research as they have a variety of applications in various branches of social and scientific disciplines like Ecology, Social Dynamics, Financial Mathematics, Engineering and many branches of Physics such as Biophysics, Chemical Physics, Fibre Optics, Fluid Mechanics, Neuro-physics, Particle Physics, Solid State Physics and many more. Many powerful and efficient methods of finding exact solutions of NLEEs have been proposed so far and the Trial Equation Method [ 1 - 5] is one of them. Many authors have successfully used the method in finding exact solutions of a number of NLEEs. In the present paper, soliton solutions of the Coupled Higgs Field Equation [ 6 - 10 ] are being obtained using the Trial Equation Method.Â The Coupled Higgs Field Equation describes system of conserved scalar nucleons interacting with neutral scalar mesons in particle physics. This coupled equation has applications in the studies of Field Theory and Electromagnetic waves as well. This coupled equation introduces the Higgs field to illustrate the mechanism of generation of mass for Gauge Bosons. The Coupled Higgs Field Equation is generally expressed as the following pair of NLEEsÂ Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â (3)Â andÂ Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â (2)Â Here, x and t are spatial and temporal variables respectively, the function Â is a complex scalar nucleon field, the function Â is a real scalar meson field, Â are arbitrary real constants and the subscripts denote partial differentiations with respect to them.Using the Trial Equation Method, the above coupled NLEE is to be solved to obtain some soliton solutions.
Exploration on traveling wave solutions to the 3rd-order kleinâ€“fock-gordon equation (KFGE) in mathematical physics
Authors: Hasan Mahmud Shahen Nur , . Foyjonnesa , Habibul Bashar Md.
Published: February 2021

In this paper, the -expansion method has been applied to find the new exact traveling wave solutions of the nonlinear evaluation equations (NLEEs) by utilizing 3rd-order Kleinâ€“Gordon Equation (KFGE). With the collaboration of symbolic commercial software maple, the competence of this method for inventing these exact solutions has been more exhibited. As an upshot, some new exact solutions are obtained and signified by hyperbolic function solutions, different combinations of trigonometric function solutions, and exponential function solutions. Moreover, the -expansion method is a more efficient method for exploring essential nonlinear waves that enrich a variety of dynamic models that arises in nonlinear fields. All sketching is given out to show the properties of the innovative explicit analytic solutions. Our proposed method is directed, succinct, and reasonably good for the various nonlinear evaluation equations (NLEEs) related treatment and mathematical physics also.Â
Efektifitas Media Komunikasi di Tengah Pandemi: Respon Gugus Tugas Percepatan Penanganan Covid-19 Kabupaten Tulungagung
Authors: Syaipudin Latif
Published: February 2021

This study aims to find the significance of messages conveyed through communication media in a pandemic situation. The demands of a pandemic era have crisis dimensions on various fronts, making the choice of communication media more careful. This problem will then have an impact on the misinformation received by the community. Therefore, the selection of mass communication as a strategic media in response to various existing problems can be an alternative as a means of early education that directly targets the wider community effectively and efficiently. The main discussion in this research is related to the important role of mass communication in the midst of the COVID-19 pandemic. This research uses qualitative methods with the type of field study research. Data collection techniques using observation, interviews, and documentation. To sharpen the data analysis, this study uses the Peter L. Berger and Thomas Luckmann social construction approach. This study found that mass communication has a central role in responding to the COVID-19 pandemic. This role forms a new behavior that emerges from a new social order and reconstruction in the face of a social order that is more adaptive to the pandemic situation. To create this situation, it requires close communication between stakeholders and the community in responding to this problem.Penelitian ini bertujuan untuk menemukan signifikansi pesan yang disampaikan melalui media komunikasi dalam keadaan pandemi. Tuntutan masa pandemi yang berdimensi krisis dalam berbagai lini, menjadikan pemilihan media komunikasi harus lebih hati-hati. Persoalan ini kemudian akan berdampak pada kesalahan informasi yang diterima oleh masyarakat. Oleh sebab itu, pemilihan komunikasi massa sebagai media yang strategis dalam menanggapi berbagai persoalan yang ada dapat menjadi alternatif sebagai sarana edukasi dini yang langsung menyasar terhadap masyarakat luas dengan efektif dan efisien. Bahasan utama dalam penelitian ini berkaitan dengan peran penting komunikasi massa di tengah pandemi COVID-19. Penelitian ini menggunakan metode kualitatif dengan jenis penelitian studi lapangan. Teknik pengumpulan data menggunakan observasi, wawancara, dan dokumentasi. Untuk mempertajam analisa data, penelitian ini menggunakan pendekatan konstruksi sosial Peter L. Berger dan Thomas Luckmann. Penelitian ini menemukan bahwa komunikasi massa memiliki peranan sentral dalam menanggapi pandemi COVID-19. Peran ini membentuk perilaku baru yang muncul dari tatanan dan rekonstruksi sosial baru dalam menghadapi tatanan sosial yang lebih adaptif dengan keadaan pandemi. untuk menciptakan keadaan ini, diperlukan komunikasi yang erat antara stakeholder dengan masyarakat dalam menanggapi permasalahan ini.
Kwestionariusz do badania relacji trener-zawodnik (CART-Q): polska adaptacja (PlCART-Q)
Authors: Michalak Anna , Poczwardowski Artur
Published: February 2021

W pracy dokonano polskiej adaptacji kulturowo-językowej wersji anglojęzycznej kwestionariusza do badania relacji trener-zawodnik: The Coach AthleteRelationship Questionnaire (CART-Q; Jowett i Ntoumanis, 2004). Nowo powstałe narzędzie (PlCART-Q) wykorzystano w badaniu polskich zawodników (N = 97) i trenerów (N = 65). Miało ono na celu zbadanie trafności teoretycznej i kryterialnej narzędzia oraz jego rzetelności. Konfirmacyjna analiza czynnikowa nie potwierdziła trafności teoretycznej narzędzia. Przeprowadzono eksploracyjną analizę czynnikową metodą głównych składowych, która wykazała istnienie jednego ogólnego czynnika – relacja trener-zawodnik.
Prokrastynacja – struktura konstruktu a stosowane skale pomiarowe
Authors: Jaworska-Gruszczyńska Iga
Published: February 2021

Niniejsza praca poświęcona jest zjawisku prokrastynacji i konstrukcji kwestionariusza badającego zwlekanie. Ze względu na brak polskich badań praca powstała głównie w oparciu o dostępne w internetowych bazach EBSCO artykuły naukowe autorstwa najważniejszych badaczy zajmujących się tą tematyką, m. in. J. R. Ferrariego, C. H. Lay’a, H. C. Schouwenburga, E. D. Rothblum, L. J. Solomon, L. Manna, P. Steela, T. Pychyla. Punktem wyjścia jest przegląd zagadnień teoretycznych, stanowiący wstęp do prezentacji badań własnych. Badania przeprowadzono na próbie 160 ochotników, którzy wypełnili cztery połączone skale – General Procrastination Scale, Adult Inventory of Procrastination, Tuckman Procrastination Scale, Aitken Procrastination Inventory. Na uzyskanych danych dokonano analizy czynnikowej oraz hierarchicznej analizy skupień, wyłaniając 40 pozycji tworzących końcową wersję Kwestionariusza Zwlekania (KZ). Skonstruowana skala zawiera pięć podskal i służy do oceny ogólnego poziomu prokrastynacji oraz pięciu jej aspektów (umiejętność organizacji czasu, siła woli, świadomość prokrastynacji, zwlekanie jako cecha, niepunktualność), a w przyszłości może umożliwiać tworzenie indywidualnych profilów zwlekania osób badanych. Kwestionariusz uzyskał wysoki współczynnik zgodności wewnętrznej alfa Cronbacha 0,971. Analiza sprawdzająca wartość diagnostyczną skali wykazała, że stanowi ona dobre źródło hipotez zarówno badawczych, jak i klinicznych na temat przyczyn i charakterystyki zwlekania osób o różnych poziomach prokrastynacji.
Egzystencjalna Teoria Umysłu: konstrukcja narzędzia pomiarowego
Authors: Kosakowski Michał
Published: February 2021

Egzystencjalna Teoria Umysłu (EToM) jest postulowanym przez J. Beringa mechanizmem postrzegania wydarzeń życia codziennego jako rezultat działalności istot nadprzyrodzonych.Wykazano, iż skłonność do dostrzegania w nich intencjonalności koreluje ze wyższymi wynikami na skali współczynnika empatii (EQ). W pracy przedstawiono tworzenie kwestionariusza mającego służyć do pomiaru funkcjonowania EToM, w populacji osób zdrowych. W skład próby weszło 189 studentów (41 mężczyzn, średnia wieku 22 lata). W celu weryfikacji trafności teoretycznej skorelowano wyniki kwestionariusza PETU z wynikami kwestionariusza Ilorazu Empatii (EQ-40), subtelną skalą paranoi (Pa-S) z testu MMPI i wynikiem uzyskanym w pomiarze myślenia analitycznego. Uzyskano słaby istotny statystycznie dodatni związek wyników PETU z wynikami EQ-40 (rho = 0,25, p < 0,05), zgodnie z założeniami teoretycznymi. Analiza czynnikowa kwestionariusza wykazała istnienie jednego czynnika (α = 0,78).
Notices biographiques
Authors: Vallery-Radot Sophie
Published: February 2021

Le concile de Constance est ouvert par le pape Jean XXIII en novembre 1414 afin de résoudre le schisme qui divise l’Église d’Occident depuis 1378. Les Pères conciliaires sont regroupés en quatre puis cinq nations conciliaires dont la nation française. Qui est-elle ?

Cet ouvrage se propose d’abord de répondre à cette question par le biais d’une étude prosopographique. Il s’agit d’identifier les membres de la nation française, de déterminer leur appartenance à des réseaux, qu’ils soient curiaux, familiaux, religieux, universitaires ou politiques. Ce travail s’attarde aussi sur les conflits entre les nations conciliaires et sur la construction de l’identité nationale française dans le cadre conciliaire.

À l’occasion du sixième centenaire de la réunion de ce concile, cet ouvrage apporte un regard renouvelé sur le rôle qu’y jouent les membres de la nation française.
On trouvera également dans cet ouvrage les notices biographiques des Pères conciliaires membres de la nation française.
Heat Transfers Coefficients of Directly and Indirectly Cooled Component Areas during Air-Water Spray Cooling
Authors: Kahra C. , Nürnberger F. , Maier H. J. , Herbst S.
Published: February 2021

For the determination of heat transfer coefficients in air-water spray cooling, two methods are presented that are capable of characterizing multi-nozzle cooling set-ups. The methods are based on the quenching of thin-walled tubes or massive cylinders on which cooling curves are recorded at given positions with thermocouples. The temperature dependent heat transfer coefficients were calculated by an inverse calculation and the measured temperature-time-curves could be reproduced with these data in numerical cooling simulations. Next, the determined heat transfer coefficients were used for the calculation of an air-water-spray quenching process of a forging part with more challenging geometry. The calculated results were compared with thermocouple measurements. Different calculation variants for the heat transfer on component surfaces not directly exposed to the air-water spray are shown and discussed. ◼
A Model to Predict the Microstructural Constituents after Quenching and Partitioning of Martensitic Stainless Steels
Authors: Kresser S. , Schneider R. , Zunko H. , Sommitsch C.
Published: February 2021

The typical heat treatment of martensitic stainless steels comprises hardening and subsequent tempering. Depending on the application and size of the component, tempering is carried out either at low temperatures (< 300 °C) or at high temperatures (> 500 °C). In this paper, tempering at lower temperatures is examined.

First, the austenitizing step is considered in greater detail and an optimized formula for the calculation of the MS temperature of such steel grades is created in order to enable to be modelled. For the calculations, the austenite composition is determined at different austenitizing temperatures using thermodynamic simulation. Furthermore, the transformation of austenite into martensite during quenching is described with the help of the Koistinen-Marburger equation.

The second part deals with effects in the material at low holding temperatures. Here, the influence of different hardening temperatures and interception temperatures of the quenching procedure is investigated. There is no complete partitioning at temperatures of 300 °C. Certain tempering processes can also take place, such as the formation of transition carbides, so-called M3C carbides. A typical tempering with formation of stable Cr-rich carbides does not occur at this low temperature. Finally, the calculated results of the model correlate well with microstructural investigations (XRD, LOM). ◼
Production and Characterization of Biosurfactant byNocardiaSpecies Isolated Form Soil Samples in Tehran
Authors: Javadi Ali , Pourmand Mohamad Reza , Hamedi Javad , Gharebaghi Fatemeh , Baseri Zohre , Rahdar Hossein Ali , Morovvati Abbas , Mohammadzadeh Razieh , Eshraghi Seyyed Saeed
Published: February 2021

In this work, we report theNocardiaspecies were initially screened and then tested for their ability to produce biosurfactant. The biosurfactant production from theNocardiaspecies was determined by qualitative standard methods. The selected bacterial strain had better oil spreading and emulsifying activity and surface tension reduction. The biosurfactant producer strain was identified by 16S rRNA gene sequencing method. Using Fourier transform infrared spectroscopy and comparative analysis, the biosurfactant structure could be detected. Oil spreading tests and blue agar plate tests confirmed the presence of biosurfactant and extracellular anionic glycolipids. The E24% assay using olive oil showed strong emulsifying characteristic of extracted biosurfactant with a 100%. The stability of the biosurfactant produced in different conditions was significant.Nocardiacoubleae was identified by biochemical methods and molecular methods.
Evolution of nonlinear stationary formations in a quantum plasma at finite temperature
Authors: Chandra Swarniv , Das Chinmay , Sarkar Jit
Published: February 2021

In this paper we have studied the gradual evolution of stationary formations in electron acoustic waves at a finite temperature quantum plasma. We have made use of Quantum hydrodynamics model equations and obtained the KdV-Burgers equation. From here we showed how the amplitude modulated solitons evolve from double layer structures through shock fronts and ultimately converging into solitary structures. We have studied the various parametric influences on such stationary structure and also showed how the gradual variations of these parameter affect the transition from one form to another. The results thus obtained will help in the generation and structure of the structures in their respective domain. Much of the experiments on dense plasma will benefit from the parametric study. Further we have studied amplitude modulation followed by a detailed study on chaos.