bluuebunny/crossref_metadata_2025_split huggingface dataset:
Adaptation disorders found among students of higher educational institutions of specialties of marine and river transport in the conditions of long-term sailing
Authors: R.P Shevchenko 
Published: July 2024

In article the analysis is carried out of features of disorders of adaptation capabilities found among students of higher educational institutions of specialties of marine and river transport. On the basis of the conducted research comparative characteristic of features of violations of adaptation at junior students and senior students who have undergone floating practice in a long voyage (over 3 months) is given. An approach in development of psychocorrectional actions in groups of a research taking into account clinical and a pathopsychological features is offered.Â Â
Robust image watermarking based on QR factorization and LWT
Authors: M. Abduldaim Areej , Qasim Hamid Mohammed 
Published: July 2024

Personal information needs to be safely transmitted over the internet and addressed effectively. Robust watermarking of biometric patterns is a convenient technique used to increase security and data authentication, which is decisive due to the uniqueness of some types of watermark images. Biometrics like fingerprints, voice, retina, iris, and blood vessel tree are being increasingly utilized for affirmative identification since they cannot be mislaid or forgotten and represent perceptible components. Furthermore, from the viewpoint of linear algebra, any digital image can be expressed by a matrix consists of a non-negative number of scalars. The objective of this paper is to intro-duce a newfangled blind watermarking algorithm using matrix decomposition method named QR. The application and analysis of the QR Matrix decomposition technique illustrate its impact on each block of the LH2 subband in the frequency domain that represents the output of two-level LWT (Lifting Wavelet Transform). The experimental results display that the newly proposed mechanism is secure and imperceptible. The final conclusion shows that the proposed method can get better PSNRs and that the proposed algorithm fulfills better watermark imperceptibility and robustness beneath different attacks.Â Â Â
An integrated multi layers approach for detecting unknown malware behaviours
Authors: Imad Wajeeh AL-Shahwani Humam , Mohamed Yassin Warusia , Zainalabidin Zaheera , Rasheed Mohammed 
Published: July 2024

Malware represents one of the dangerous threats to computer security. Dynamic analysis has difficulties in detecting unknown malware. This paper developed an integrated multi â€“ layer detection approach to provide more accuracy in detecting malware. User interface integrated with Virus Total was designed as a first layer which represented a warning system for malware infection, Malware data base within malware samples as a second layer, Cuckoo as a third layer, Bull guard as a fourth layer and IDA pro as a fifth layer. The results showed that the use of fifth layers was better than the use of a single detector without merging. For example, the efficiency of the proposed approach is 100% compared with 18% and 63% of Virus Total and Bellegarde respectively.Â Â
Demand response programs in smart grids â€“ survey
Authors: H. Al-Kharsan Ibrahim , Z. Ghazi Zahid Ali , F.Marhoon Ali. , Radhi  Mahmood Jawad 
Published: July 2024

The smart grid in this century has an essential role in changing the philosophy of the electrical power engineering. In the past, the generation must be equal to the demand under any situation but with the introduction of the non-conventional grids everything is changed, and the customers should consume energy in the same amount to what already generated from the generation units. The tool to achieve all that is the demand response (DR) strategy. DR can alter the consumption pattern of the consumers to make it flatting instead of the sharp curves that lead to additional costs coming from the increasing generating in the periods of the peaks in the load curve. In this paper, the demand response programs listed and discussed with an indication to the documents that deal with each type.Â Â
Supervised AFRC (Ada boost fast regression) machine learning algorithm for enhancing performance of intrusion detection system
Authors: Jain Abhishek , Khushboo Tripathi Dr. 
Published: July 2024

In recent wireless network play critical role in every activity of human life. This wireless network process sensitive data network communication requires appropriate cyber security. In order to offer cyber security in computer network antivirus, user authentication schemes, firewalls and access control techniques has been developed to detect abnormal activities and potential attacks in computer network. To ensure security Intrusion Detection System (IDS) is designed for network security. In this paper proposed a Adaboost Fast Regression Classifier for attack or malicious activity detection in IDS system. For analysis in this research used CICIDS 2017 dataset the main advantage of this dataset is redundant data are minimal hence accuracy of malicious detection is increased. Collected dataset is fed into MATLAB and evaluated with proposed AFRC mechanism. In proposed AFRC scheme AdaBoost classifier and regression classifier are combined for attack identification and classification. Comparative analysis of proposed AFRC scheme with existing approach exhibits significant performance in terms of attack identification with reduced computational cost.Â Â Â
Formability characterization of aluminium AA6082-O sheet metal by uniaxial tension and Erichsen cupping tests
Authors: T. Nghishiyeleke Eliaser , M. Mashingaidze Melvin , A. Ogunmokun Adedayo 
Published: July 2024

AA6082 is a relatively new structural alloy in the 6000 aluminium alloy series. This study evaluated the deep drawability of AA6082-O sheet metal. Uniaxial Tensile tests were conducted on specimens prepared according to DIN 50125-E standard, for three angular orienta-tions (0â°, 45â°, and 90â°) relative to the rolling direction. Erichsen Cupping tests were conducted on 60 mm Ã— 60 mm blanks of two gauge thicknesses (1.0 mm and 2.0 mm) and also on segmented blanks. A WP 300 Universal Material Tester, with a loading capacity of 20 kN, was used for all the tests. The Tensile Strength was higher in the rolling direction (0â°) than in the transverse orientations (45â° and 90â°). The resultant Forming Limit Curve (FLC) level of the established Forming Limit Diagrams (FLDs) was higher for the 2.0 mm thick blanks than the 1.0 mm thick blanks. Thus the alloyâ€™s formability is affected by the sheet thickness and orientation. It increases with sheet thickness, but the alloy exhibits planar anisotropy (âˆ†r<0). AA6082 sheet fractures with no observable necking under uniaxial tension conditions, and exhibits non-uniform yielding characteristics. However, the general stress-strain behaviour is typical of that of the aluminium 6000 alloy series.Â Â
Congestion Management by Optimal Generation Rescheduling Using Sine Cosine Algorithm
Authors: Kumar Tailor Tarun , Kumar Yogendra , Dubey Manisha 
Published: July 2024

Under deregulated market environment, technically efficient and cost-effective operation of the power system becomes imperative. Congestion in transmission lines is one among key facet dealt by network operator as it greatly affects the operation of power system. This paper intends to manage power network congestion by means of rescheduling real power generation. Sensitivity analysis has been carried out to select the generators for rescheduling real power generation. In order to improve the economic efficiency of the electrical power market, an attempt is made to minimize the congestion cost. Sine Cosine Algorithm (SCA) has been employed to solve the considered problem. The viability of the considered method has been investigated by implementing it on the modified IEEE 57-bus test system. To confirm the efficacy of employed algorithm obtained results are compared with those available in the literature. The results illustrate that considered approach offers improved results and effectively minimizes congestion cost.Â Â Â
The development of approximation theory and some proposed applications
Authors: Saad Al-Muhja Malik , Misiran Masnita , Omar Zurni 
Published: July 2024

In this survey article, we review the early history of approximation theorem that was introduced by Weierstrass in the late 18th century, together with its extension works. We also propose some applicable scenarios that best fit this theory. Such applications include the kinetics conditions related to manual and automatic vehicle transmission by using convex function, and the theory of calculating deviations of eyeâ€™s layers (normal vision, hyperopia and myopia) in some patients by using monotone function.Â Â Â Â
Fuzzy MCDM methods application in radio resource management for modern communication systems
Authors: M. Alkhawlani Mohammed 
Published: July 2024

Fuzzy MCDM methods are a hybrid multi criteria decision making systems where the advantages for both fuzzy logic theory and the traditional MCDM are utilized. Fuzzy MCDM systems take into account the insufficient information and the evolution of available knowledge and they are very useful to deal with the uncertain and imprecise data. The radio resource management mechanisms in modern communication systems are typical multi criteria problems and the usage of MCDM systems is mandatory to reduce the influence of the imprecise, contradictory, and dissimilar measurements of these complex communication systems.In this paper, two different fuzzy MCDM systems are developed to address one of the most important radio resources management mechanisms which is vertical handover (VHO). These systems use fuzzy AHP and fuzzy SAW methods. Illustrative numerical examples for the developed systems are presented. The examples show that the choice of the MCDM tool can directly affect the ranking order of the available access networks, and hence, the selection of the MCDM methods is highly critical in any VHO solution.Â Â
Contra Rotating Ducted Propeller Analysis using Computational Fluid Dynamics
Authors: Adnan Fadilah Putra , Furqon Era Dadang 
Published: July 2024

Propeller is well known as a mechanical device for propelling a boat or aircraft, consisting of a revolving shaft with two or more broad angled blades attached to it. For now propeller is used in many types of aircraft and boats. This paper is focusing on the propeller, which is applied for small aircraft such as Unmanned Aerial Vehicles (UAV) where the size of the vehicle can be one of the design constraint. Tandem propellers configuration can be an option to cope with the size constraint. This paper studies the performance of tandem propellers in contra-rotating configuration. The study begins with the validation of Computational Fluid Dynamics (CFD) calculation by comparing the results in term of thrust coefficient to the existing performance data. The case study used an UIUC standard 10 inch propeller. The study of contra rotating ducting propeller is performed by analysing the single ducted propeller and followed by the tandem contra rotation ducted propellers set at different axial distances. The results show that the single ducted propeller performs better than open propeller, and there is an optimal distance between propellers in tandem configuration which gives maximal thrust coefficient.Â Â Â Â
Extraction of Building Footprints from Different Unmanned Aerial Vehicle (UAV) Platforms
Authors: Ismail Nabila , Nizam Tahar Khairul 
Published: July 2024

The demand for map updating is increasing especially for developing countries. Therefore, rapid data acquisition of an urban area is needed. This study proposes unmanned platform as one of the solutions for rapid data acquisition to update the map for developing countries. The objective of this study is to perform the extraction of building footprints using fixed-wing unmanned aerial vehicle (UAV) and multi-rotor UAV. All images acquired from both UAVs were processed using different image matching algorithms to perform relative orientation. The building footprints were extracted based on different orthophoto results. The building footprints were evaluated in terms of area and length. The results show the area based matching method records the accurate result in term of area and length assessment which are about 13m2 and 1.4m respectively. The results also show the multirotor provides the accurate results compared to fixed wing platform. The outcome could be used for specific applications such as urban expansion changes and land cover change detection.Â Â
The Development of Student Station for Drag Polar Testing
Authors: Arifianto Ony , Muhammad Hari , Sukma Windratih Pramesthi , Safiâ€™i Imam 
Published: July 2024

In order to improve the teaching and learning activities in the flight mechanic subjects, the Aerospace Engineering Program, ITB, is currently developing a flying laboratory, based on a fixed-wing unmanned aerial vehicle (UAV). The development process itself has reached a phase, where both graphical user interface (GUI) and flight testing scenario for drag polar assessment are being developed, Â and evaluated. The evaluation of the GUI is performed by creating a simulated flight testing using X-plane software. Due to the model availability in the X-plane, a Cessna 172 model is used instead of a fixed-wing UAV model. The drag polar test is conducted by trimming the aircraft model in steady symmetric level flight condition using the autopilot provided by X-plane. In the simulated test scenario, the aircraft weights and trim speeds are varied while the altitude and and center of gravity (CG) location are held constant. The flight data is then captured and processed with the developed GUI. Further, the lift coefficient (CL) and drag coefficient (CD) are obtained from the aircraft weight, engine thrust, trim speed, and the corresponding atmospheric data. The coefficients are plotted and a curve fitting process is performed to obtain the analytical approximation of the drag polar curve. When the calculation results are compared to the lift and drag coefficients data of the aircraft model, obtained directly from X-plane software, both of them are in a good agreement. Differences might appear from the incompatibility in the drag components calculation of the X-plane software.Â Â
Lift Generation of Compliant Wing Mechanism of Flapping Wing
Authors: Yusoff Hamid , Iswadi Ismail Noor , Reedzman Mohd Rakmi Muhammad , Suhaimi Shafiq , Wisnoe Wirachman 
Published: July 2024

Flapping wing micro air vehicles are small, lightweight and can fly in a low Reynolds Number environment. They are capable of flying at low Reynolds number environment with amazing agility by imitating natural flyers like bats and have compliant wings while flapping. The primary goal of this study is to design and fabricate the compliant mechanism of flapping wing for improvement of lift performance of a MAV. The test was carried out in an open-air wind tunnel. Furthermore, the compliant wing mechanism is measured based on Angle of attack, Reynolds number and flapping frequency. The result shows, lower angle of attack produces lower lift coefficient while higher angle of attack (40Â°) produces higher lift coefficient until it reaches stall where the lift decreases drastically. The compliant wing mechanism at Reynolds number 20000 produces higher lift coefficient compared to higher Reynolds number, 36000. The best flapping frequency for the compliant wing mechanism is 9 Hz which is the highest frequency used in this experiment. The trend of the flapping frequency shows that the lift coefficient increases when flapping frequency increases. The highest lift produced for compliant wing mechanism is at 40Â° angle of attack, 9 Hz flapping frequency and 20000 Reynolds number.Â Â
Aerodynamics of a Blended Wing Body Aircraft with Close-Coupled Tail: Computational Fluid Dynamics Simulations of Two Different Tail Sweep Angle Cases
Authors: Azan Haiqal Mohamed Shafari Nur , Effendy Mohd Nasir Rizal , Zulfazli Arief Abd Latif Mohamad , Aiman Ahmad M. , Wisnoe Wirachman , Kuntjoro Wahyu 
Published: July 2024

This paper presents the aerodynamic performance of Baseline V blended wing-body aircraft via Computational Fluid Dynamic (CFD) simulation. Baseline V has a set of close-coupled tail plane that can change its incidence and tilt angle for pitch and yaw control. Based on previous research, Baseline V has insufficient longitudinal stability in term of pitch moment at zero angle of attack which is negative value at zero tail incidence angles. When tail incidence is set at âˆ’10Â°, the moment coefficient at zero angle of attack is zero thus not sufficient for trim flight with stable pitch moment slope. This leads to the idea of sweeping the tail of the aircraft to increase moment arm. In this paper, two cases are considered which is 0Â° (case I) and 30Â° (case II) tail sweep angle in which both cases have tail incidence at âˆ’10Â°. NUMECA suit is used as computational tool for this simulation. The simulated environment consists of half-model Baseline V BWB in domain 20 times the length of the aircraft with body centre plane acts as a mirror. The angle of attack used for this simulation is between -10Â° to +17Â° while airspeed is fixed at 15m/s or Mach 0.05. Due to aircraftâ€™s small mean chord and low airspeed flight, its Reynold number is low at 1.0 x 105 even at its body chord. Therefore, Laminar Navier-Stoke Equation is used for the computational simulation. Lift, drag and pitch moment coefficients with respect to angle of attack for both tail cases are computed from the simulation. The results from the CFD simulation is then compared with wind tunnel experiment results measured at AEROLAB, Universiti Teknologi Malaysia. The result shows that the trends of lift, drag and moment coefficients against angle of attack obtained from CFD simulations are similar to plots obtained from wind tunnel experiment for both tail sweep angle cases. It is found that tail sweep angle case of 30Â° has slightly less lift but higher drag coefficients compared with 30Â° tail sweep angle case while its pitch moment coefficient at zero angle of attack has now improved to allow positive trim angle of attack. However, the former has much lower maximum lift-to-drag ratio than the latter.Â Â
Access mechanism using inter planetary file system
Authors: Konala Pandu Ranga Reddy , SaiAbhinav Reddy V. , Krishna Chaitanya Varma D. , G Radhika 
Published: July 2024

Withthe advent of Internet of Things, trust is one of the important factor for provisioning secure, reliable, seamless communications and services. Connected devices are the order of the day, where IoT plays a vital role in the functioning. However, these IoT devices use various protocols for communication mostly a centralized architecture for data transfer. Some of these protocols are Message Queue Telemetry Transport (MQTT), which is a Pub-Sub (publisher and subscriber) protocol used for a device-to-device communication on TCP through a broker. This centralized server can be a third party service provider, which again raises the issue of trust. To address this, we propose a decentralized and distributed network architecture called Inter Planetary File System (IPFS) is used instead of third-party service provider. IPFS enables publish â€“ subscribe model similar to MQTT, but by removing the broker and making a peer-to-peer communication. Peer-to- peer architecture has its own challenges like security. The issue of security is also addressed by encrypting the files or data that has to be sent over the IPFS network using PGP (Pretty Good Privacy).Â Â Â
Knee and Hip Extension Responses to Prolonged Simulated Soccer Match-Play: a 2D Study
Authors: Hamdan Muhammad , Norfariza Mohd Noha Siti , Hasan Hosni , Ismail Hashbullah , Mohammed Firhad Raja Azidin Raja 
Published: July 2024

The first part of this study was a reliability study to compare inter-software, inter- and intra- tester measurements using intraclass correlation coefficients (ICC2,1). All, ICC2,1 values showed excellent scores thus supporting the utility of a two dimensional motion analysis system using an open-source, free software. In the second part of this study, the effects of a 120-minute simulated match-play simulation on knee and hip kinematic was investigated. Eighteen participants consented to this study and were required to complete a 120 minutes of simulated soccer match-play. Knee and hip angles were measured at initial contact during 45Â° anticipated side-cutting tasks throughout the simulation. A 2 Ã— 7 SPANOVA was utilized. Both knee and hip extension angles were significantly altered over time. No significant differences were observed between dominant and non-dominant sides. A more extended knee and hip landing posture suggested a greater risk of ACL injury during match-play over time. Findings from this study suggest that the non-dominant limb is as likely to suffer non-traumatic ACL injury as the dominant limb. Further interrogations of the biomechanical differences in the knees and hips across limb dominance are warranted for more comprehensive understanding of the changes in multiplanar perspectives following fatigue inducing exertions.Â Â
Blood Flow Modelling to Improve Cardiovascular Diagnostics: a Preliminary Review of 1-D Modelling
Authors: Butt A. , A. Abakr Y. , B. Mustapha K. 
Published: July 2024

Cardiovascular diseases issue an enormous threat to the health and general wellbeing of the population, therefore multidisciplinary knowledge of the cardiovascular system and its mechanics has become a necessity. Due to the lack of wide scale experimental studies, the limitations associated with it and the immense advances in computational technology, in recent years, numerical modelling of the cardiovascular system has gained popularity as a viable alternative. One-dimensional models as compared to higher dimensional models provide a feasible and efficient means to study the dynamics of pulse wave propagation in order to increase the comprehension of circulatory physiology. The aim of this paper is to provide an overall review of the types, solution methods, treatment of boundary conditions, applications and advantages as well as disadvantages of one-dimensional models of the human arterial network.Â Â
Mechanics of Total Ankle Replacement During Flexion in Relation to Geometrical Design: a Finite Element Study
Authors: Ajmal Mohd Taqayuddin Muhammad , Afzan Mohd Anuar Mohd , Shuib Solehuddin , Mohamed Zulkifli , P.P. Abdul Majed Anwar 
Published: July 2024

Total ankle replacement (TAR) procedure is carried out to reduce the pain due to arthritis and trauma in patients. The Â failure of TAR implants occurs through various wear mechanisms in the polyethylene due to high ankle load, leads to instability as well as loosening problem. The objective of this project is to assess the performance of Salto Talaris (TAR) implants before and after design modification. In the present study, the computational model of Salto Talaris and the modified design was developed using CATIA V5R20 while the finite element analysis (FEA) was performed in ANSYS V18. The results have shown that the maximum von Mises stress induced in the polyethylene insert for Salto Talaris and the new design were 13.9 MPa and 8.7 MPa, respectively, with applied 880 N of axial ankle load. The modified version exhibited better performance due to elimination of edge loading with good contact area. Design modification is essential to lower the stress induced at PE insert, hence reduce the failure of TAR prosthesis.Â Â