Digital Commons Network^™

(R2152) New Bivariate Type-2 Gumbel Distribution Based On The Farlie-Gumbel-Morgenstern Copula: Properties And Its Application In Survival Analysis, Muneeb Javed, Said Farooq Shah, Muhammad Osama, Muhammad Atif, Muhammad Farooq

Applications and Applied Mathematics: An International Journal (AAM)

We introduce a new bivariate probability distribution, termed the Bivariate FGM Type-2 Gumbel Distribution, constructed by combining the Farlie–Gumbel–Morgenstern (FGM) copula with the Type-2 Gumbel marginal distributions. This proposed distribution provides a flexible framework for modeling bivariate data and offers a viable alternative to several existing bivariate distributions, especially in scenarios where capturing dependence between variables is crucial. The theoretical properties of the distribution are thoroughly explored. We derive the marginal and conditional distributions, conditional expectations, moment generating function, and product moments. Procedures for random number generation from the distribution are discussed. Reliability-based characteristics, such as the survival function and …

(R2150) Impact Of Specialist Predator Harvesting On The Stability Of A Three-Species Food Chain Model With A Generalist Predator, S. Ganga, S. Vijaya

Applications and Applied Mathematics: An International Journal (AAM)

In this study, the stability of a three-species food chain model comprising a prey, an intermediate specialist predator, and a top predator exhibiting generalist behavior is examined, with harvesting applied to the intermediate predator. The main objective is to investigate how variations in the harvesting rate influence system stability and the coexistence of all three species. The positivity, boundedness, and equilibrium points of the model are analyzed to ensure biological feasibility. The equilibrium point involving the prey and the top predator satisfies the criteria for both local and global asymptotic stability. The coexistence equilibrium point attains local asymptotic stability based …

Tinig-Karakter Sa Mga Pader: Graffiti, Bandalismo, At Mga Banyulatin Sa Piling Panitikang Filipino (Character-Voices On Walls: Graffiti, Vandalism, And Latrinalia In Select Philippine Literature), Harvey James G. Castillo

Filipino Faculty Publications

Makailang beses lilitaw sa tradisyonal na midya at social media sa nagdaang kalahating dekada ang ilang pagtutol, pagbabawal, at pandidiri sa mga graffiti at nagsusulat ng mga graffiti mula sa parehong mamamayan at maykapangyarihan. Bunsod ng paggamit ng mga militanteng grupo sa graffiti bilang anyong pamprotesta sa Kalakhang Maynila, tatagurian ng nakararami ang gayong mga sulatin bilang bandalismo o paninira lamang sa pampubliko o pribadong pagmamay-ari. Taliwas ito sa balintunang paggamit din ng estado at merkado sa graffiti, o estetika ng graffiti, sa pamamahala ng espasyo o pagbebenta ng produkto. Sa ganang ito, bumabaling ang pag-aaral sa panitikan bilang lunan …

Arthur Coffin's Robinson Jeffers: Poet Of Inhumanism, Terry Beers

Jeffers Studies

No abstract provided.

Cover Vol. 53 Issue 4, ศูนย์นวัตกรรมทางการศึกษา สื่อสิ่งพิมพ์ และสื่อออนไลน์ จุฬาฯ

Journal of Education Studies

No abstract provided.

Development Of A Social Media Political Engagement Scale For Thai Youth, Thanaphol Huayhongtong, Nhabhat Chaimongkol

Journal of Education Studies

The purpose of this research was to develop and validate a social media political engagement scale for Thai youth. The sample consists of 934 grade 10-12 students in the academic year 2025, from schools administered under the Office of the Basic Education Commission (OBEC), Ministry of Education. Recruiting by using a muti-stage random sampling. The research instrument was a social media political engagement scale, a 5-point Likert scale, consisting of 73 items. The psychometric quality of the scale was evaluated using the content validity index (CVI), item discrimination indices, and internal consistency reliability. The finalized scale comprised 49 items across …

Read Well, Read Right: Developing Thai Reading Skills Of Third-Grade Students Through Phonics-Based Instruction Combined With Reading Skill Exercises, Wirachai Longkaeo, Sitah Thayati

Journal of Education Studies

This pre-experimental research aimed to 1) examine the effects of phonics-based instruction combined with reading skill exercises on Thai reading skills of third-grade students, and 2) investigate the learning process and factors contributing to the success of this instructional approach. A one-group pretest-posttest was employed. The target group consisted of 15 third-grade students from a private school in Chiang Mai Province, selected through purposive sampling based on their Thai reading assessment scores, identifying students with beginning-level reading foundations. The intervention lasted 10 hours. Research instruments included 1) a Thai reading skill test, and 2) observation and student reflection form. Quantitative …

Development Of A Competency-Based Curriculum Through Co-Creation Mechanism To Build High-Skilled Labor Force: Case Studies Of Thailand, Singapore, Germany And South Korea, Panisa Harnpathananun, Somboon Sirisunhirun

Journal of Education Studies

Thailand’s time-based education system still faces limitations in developing 21st Century skills and misalignment with labor market demands. This article analyzes the development of a competency-based curriculum (CBC) through case studies of Thailand, Singapore, Germany, and South Korea, aiming to propose guidelines for enhancing high-skilled labor that corresponds to the needs of the industrial sectors. The study reveals that Thailand has CBC pilot projects such as Work-integrated Learning (WiL), Skill-Mapping, and Higher Education Sandbox. However, it also has key weaknesses, for example, weak tripartite cooperation (government, private sectors, educational institutions), insufficient financial support, inflexible curricula that do not focus on …

Development Of A Learning Activity Package With Integrated Reading Strategies To Promote Reading Literacy Among Lower Secondary School Students, Tasanee Satthaphong, Thassanant Unnanantn

Journal of Education Studies

The objectives of this study were to: 1) develop learning activity packages incorporating integrated reading strategies among lower secondary school students, with a targeted efficiency of 80/80, and 2) examine differences in students’ reading literacy performance before and after the implementation of the learning activity packages. The sample comprised 30 grade 9 students, through multi-stage random sampling, who were enrolled in the first semester of the 2024 academic year at a public secondary school in Bangkok. The intervention was conducted over a period of eight weeks, encompassing a total of 16 instructional periods. The research instruments consisted of 1) four …

The Effects Of Contemplative Facilitation On The Enhancement Of Self-Awareness Among The Elderly: A Case Study Of The Social Welfare Development Center For Older Persons, Chanokporn Suwittayapan, Proetphan Daensilp, Jiraporn Kespichayawattana

Journal of Education Studies

This action research aims to examine a contemplative facilitation process that fosters self-awareness among the elderly. The participants were 10 elderly people from a Social Welfare Development Center for Older Persons in Phra Nakhon Si Ayutthaya Province. Qualitative data were collected through participant observation and in-depth interviews, and data were analyzed using thematic analysis. The results revealed that the developed contemplative facilitation process, grounded in mindfulness cultivation, observation of the body, emotions, and thoughts, and deep listening, comprised eight activity sessions incorporating art-based activities and nature-connected practices. This process led to the development of self-awareness in four main areas: 1) …

Dynamic Characteristic Simulation And Optimization Of Ground Test System For Airborne Launch Rack, Yuguang Bai, Sheng Zhang, Yushun Cao, Xiaoshi Zhang, Hu Huang

Journal of System Simulation

Abstract: To solve the ground equivalent test problem of the airborne launch system, an optimization method for the dynamic characteristics of the ground launch rack test system based on a multi-variable optimization approach was proposed. Through the discussion on the boundary conditions of the foundation, an effective dynamic simulation model of the ground launch test system was established. By comparing the dynamic characteristics of the launch rack structure in the airborne state and the ground test state, the objectives and constraints of the optimization design were determined. The dynamic characteristics of the ground test system were optimized and designed. …

The Robinson Jeffers Interview: A Conversation With Scott Slovic, Scott Slovic

Jeffers Studies

No abstract provided.

Generalized Pentagonal Linear And Non-Linear Functions For Solving Fully Fuzzy Linear Programming Problems, Eman Hassan Ouda, Iden Hassan Hussein

Baghdad Science Journal

Fuzzy linear programming problems (FLPP) are advanced approaches for solving linear programming problems (LPP) that involve fuzzy coefficients and variables with constraints on the problem. Numerous applications exist for the pentagonal function and ranking membership in geometry and the sciences, especially mathematics. This study suggests a novel approach for solving fully fuzzy linear programming problems (FFLPP) using the ranking function with pentagonal functions. The project aims to determine the maximum (minimum) solution to the problems where all variables, including the objective function, constraints and the right hand, are pentagonal fuzzy numbers. Additionally, generalizations of both linear and nonlinear pentagonal functions …

Comprehensive Study For Characterization Of Blending And Heat Treatment Of Organic-Based Polymer Thin Films, Ruaa M. Ali, Atyaf H. Kazem, Khalidah G. Hasan

Baghdad Science Journal

Thin films of Polypyrrole (PPy)/Cupper Phthalocyanine (CuPc) have been prepared by the spin coating technique on glass substrates, Samples were prepared in a blending ratio (50:50) in addition to pure PPy and CuPc at room temperature, these samples were annealed at (473K) and then characterized by X ray diffraction (XRD), Energy Dispersive Spectroscopy (EDX) and Scanning electron microscopy (FESEM) at different magnifications power. XRD patterns reveal that pure polypyr role is amorphous. A wide peak was seen at roughly 2θ= 24° with an average crystallite size of roughly 56 nm and CuPc had a polycrystalline structure. Annealing results …

Using Physics-Informed Neural Networks For Solving 2Nd-Order Volterra Integro-Differential Equation By Deepxde Library, Oday Ahmed Jasim, Abdulghafor M. Al-Rozbayani

Baghdad Science Journal

Many disciplines widely use deep learning (DL) as a key tool for investigating the behavior of various systems. Deep learning (DL) has recently been utilized to solve differential equations using physics-based input. Physics-informed neural networks (PINNs) are a novel DL model that excels at solving both inverse and forward non-linear PDE problems. PINNs may be trained as surrogate models for approximation solutions to the VIDE without label data by embedding the physical information outlined by PDEs in feedforward NNs. The objective of this study is to solve the second-order Volterra integral-differential equations (2nd-order VIDEs) for the first time using PINN …

Hybrid Pre-Trained Models With Machine Learning Classifier For Skin Cancer Classification, Toqa A. Sadoon, Asaad F. Qasim, Mohammed Khalaf, Ali M. Hasan

Baghdad Science Journal

Classification of skin lesions can be challenging because of the subtle variation on the skin surface due to the appearance of these lesions. In the other hand, the digital dermoscopy has been widely used by dermatologist to diagnose cancer. For accurate detection, the clinicians should have a lot of experiences, but human nature is prone to error, forgetfulness, tension, and speed in diagnosis, all of which can affect the accuracy of detection. For these reasons, automated skin lesion classification has been used by many researchers to help dermatologists in making the right and accurate decision during diagnosis. A preprocessing image …

The Gamification Of Online Dating: Exploring The Intersection Of Play, Choice, And Romance In Digital Spaces, Emma Taylor

School of Law, Humanities and Social Sciences

The rise of online dating platforms has transformed the way individuals approach romantic relationships, with many users increasingly engaging in these platforms as a form of entertainment in addition to finding meaningful connections. Central to this shift is the growing phenomenon of gamification, the incorporation of game-like elements, into non-game contexts. This article proposes to explore the gamification of online dating, examining how these game mechanics shape user behaviours, influence romantic choices, and impact relationship outcomes. By analysing the ways in which dating platforms integrate game-inspired features, this study will also assess the implications of gamified experiences for the nature …

Standardizing Assessment Of Clinical Performance In Physical Therapy: From Good Intentions To Shared Standards, Arvie Vitente, Carmina Rafael, Rolando Lazaro

Rehabilitation Sciences Department Faculty Articles

Clinical education is the crucible in which physical therapy students integrate knowledge, skills, and professional judgment into safe, ethical, and person-centered practice. Yet globally, the assessment of clinical performance remains highly variable, shaped by disparate tools, rubrics, and levels of assessor preparation. While several countries have adopted nationally standardized approaches to clinical assessment, many contexts—including the Philippines—continue to rely on locally developed or institution-specific systems, resulting in inconsistent expectations, inequitable student experiences, and limited capacity for benchmarking, research, and quality improvement. This editorial argues that good intentions alone are insufficient and that the profession must move toward shared, trustworthy standards …

Biomechanics Of The Ribs During Respiration At The Costotransverse Joint: An In-Vivo Retrospective Pilot Study, Michael Maninang, Greg Almeter, Erik Pearson, Arvie Vitente

Rehabilitation Sciences Department Faculty Articles

Introduction: Scarce in‑vivo data describe how ribs move at the costotransverse joints during quiet breathing—knowledge critical to thoracic biomechanics and pain mechanisms. This pilot study uses four‑dimensional computed tomography (4D‑CT) to quantify, for the first time, the three‑dimensional magnitude and direction of rib motion at these joints throughout quiet respiration.

Methods: This retrospective, descriptive pilot study analyzed ten 4D‑CT scans obtained from patients undergoing thoracic imaging prior to radiation therapy. End‑expiration and end‑inspiration phases were aligned with a demons deformable‑registration algorithm. For each costotransverse joint, the three‑dimensional displacement vector, its absolute magnitude, and its components along the lateral–medial (L–M), …

(R2164) The Nature Of The Big Bang Singularity In Inhomogeneous Szekeres Cosmological Frameworks, Ahmed M. Al-Haysah, Abdul-Majeed Al-Izeri

Applications and Applied Mathematics: An International Journal (AAM)

Without killing vector fields, the Szekeres metric is an explicit example of an anisotropic and inhomogeneous solution to the Einstein equations. The inhomogeneous Szekeres cosmological models (ISCM) within the Big Bang singularity (BBS) are obtained. This indicates that the Szekeres solution represents a more general class of exact solutions. It is known to exhibit axial symmetry. We investigate a Big Bang theory of the cosmos, which unexpectedly predicts that the universe started at the so-called BBS a finite length of time ago. A growing number of astrophysical researchers are using inhomogeneous extensions of the Friedmann-Lemaitre-Robertson-Walker (FLRW) solution and, by extension, …

Scheduling Method For Virtual Power Plants Based On Analysis And Forecasting Of Heterogeneous Load Characteristics, Runzhao Zhang, Yanbo Chen, Tao Huang, Haoxin Tian, Tuben Qiang, Zhi Zhang

Journal of System Simulation

Abstract: To improve the electricity supply-demand situation by rationally utilizing demand response resources, a two-layer optimal scheduling model for virtual power plants (VPPs) based on the analysis and forecasting of heterogeneous load characteristics was proposed. With the differences in response characteristics of multi-type loads considered, a demand response model for multi-type loads was constructed by using a customer baseline load (CBL) curve forecasting method that integrated dynamic scenario generation and K-means++ clustering. A two-layer optimal scheduling model for VPPs that incorporated load aggregators and demand response was established. In this model, the upper layer conducted optimal scheduling targeting maximizing the …

Spatiotemporal Graph Convolution-Based Demand Forecasting And Simulation Analysis For Automotive Parts Supply Chain, Xiaobin Li, Bing Hu, Chao Yin, Bo Li, Jun Ma

Journal of System Simulation

Abstract: To address complex automotive after-sales parts supply network operations with insufficient demand forecasting accuracy, slow response, and low service efficiency, this study proposed a spatiotemporal graph convolution-based method for automotive parts supply chain demand forecasting. Sales network data of the automotive parts sales network was constructed as a heterogeneous graph, integrating node features like parts sales volume and value to build multi-dimensional node dependencies. A node update mechanism of the graph convolutional neural network was designed, combined with long short-term memory neural networks to capture temporal features, using spatiotemporal attention to integrate temporal and spatial features into updated nodes …

Improved Pid Search Algorithm For Uav Path Planning In Mountainous Environments, Yi Peng, Yunkui Lei, Qingqing Yang, Hui Li, Jianming Wang

Journal of System Simulation

Abstract: To address the challenges of UAV path planning in mountainous environments, including high computational complexity and suboptimal optimization performance, and the disadvantages of the PIDbased search algorithm, such as low optimization accuracy and slow convergence rate, this paper proposed an improved PID search algorithm (IPSA). The method introduced a good point set to ensure a more uniform population distribution, thereby enhancing population diversity and global search capability. The Q-learning algorithm was employed to adapt PID parameter adjustments, incorporating an exploration rate factor to further improve the algorithm's exploration and computational capabilities. A lens imaging opposition-based learning mechanism was also …

A Method Of Heuristic Human-Llm Collaborative Source Search, Yi Chen, Sihang Qiu, Zhengqiu Zhu, Yatai Ji, Yong Zhao, Rusheng Ju

Journal of System Simulation

Abstract: Traditional source search algorithms are prone to local optimization, and source search methods combining crowdsourcing and human-AI collaboration suffer from low cost-efficiency due to human intervention. In this study, we proposed a lightweight human-AI collaboration framework that utilized multi-modal large language models (MLLMs) to achieve visual-language conversion, combined chain-of-thought (CoT) reasoning to optimize decision-making, and constructed a heuristic strategy that incorporated probability distribution filtering and a balance between exploitation and exploration. The effectiveness of the framework was verified by experiments. The human-AI alignment heuristic strategy with large language model adaptation design provides a new idea to reduce manual …

Optimization Of Order Picking And Sorting Coordintion In “Goods-To-Person” System, Liang Ren, Zerong Zhou, Yunfeng Ma

Journal of System Simulation

Abstract: To improve the order picking and sorting collaboration with time windows in the "goods-to-person" system, a mathematical model aiming to minimize the number of sorting batches was established. With the characteristics of this issue considered, a hybrid variable neighborhood search (HVNS) algorithm based on the "classified loading" strategy was proposed for solutions. The numerical experimental results show that the HVNS algorithm can obtain high-quality solutions while shortening the solution time; different order structures have varying effects on the utilization of the loading capacity of sorting automated guided vehicles (AGVs); under the tested experimental conditions, the collaborative operation mode …

Measurement Of Luminous Intensity Distribution For Film And Television Led Light Sources And Its Simulation Research In Game Engines, Jingyi Suo, Baihong Lu, Che Qu

Journal of System Simulation

Abstract: To address the issues of mismatched photometric characteristics between light sources in virtual environments and real-world lighting during film and television lighting design and lighting preview using game engines, a testing solution for measuring the luminous intensity distribution for film and television LED light sources was proposed, building upon existing luminaire light intensity distribution testing systems. Based on the obtained data, a light source calibration process was constructed in the UE5 to correctly simulate the photometric characteristics of light sources in the virtual environment. Simulation results have shown that the calibration process can accurately and efficiently reproduce the …

Research On Cooperative Interference Allocation Of Jamming Resources Based On Improved Genetic Algorithm, Zhixia Xu, Rui Wang, Nan Sun, Bing He, Xiaowei Shen, Xiaofei Zhu

Journal of System Simulation

Abstract: To address the cooperative interference allocation of jamming tasks, a cooperative interference allocation method of jamming resources was proposed based on the improved genetic algorithm. In search and tracking modes of the target radar, a threat level assessment was conducted by the technique for order preference by similarity to an ideal solution (TOPSIS) based on the entropy weight method. The factors affecting the jamming effectiveness of jammers were analyzed. A cooperative interference evaluation model of jamming effectiveness was established, and the allocation model of jamming resources was built with the total interference effectiveness of multiple jammers as the …

Research On Infrared And Visible Light Fusion Method Based On Resnet-50 And Laplacian Filtering, Xiao Wang, Xiangyang Li, Feng Liang, Zhili Zhang

Journal of System Simulation

Abstract: In order to solve the problem that existing infrared and visible light image fusion techniques often suffer from artifacts caused by insufficient contrast, spectral distortion, and high computational complexity, a fusion framework based on ResNet-50 and Laplacian filtering was proposed. ResNet-50 was used to extract shallow and deep features, followed by multi-scale feature fusion. Laplacian filtering was applied to optimize feature information, and an automatic discriminator was introduced to further improve the fusion effect. Simulation results show that, compared with comparison algorithms, the proposed method achieves an average increase of 2.71% and 2.16% in information entropy, 5.98% and …

Enhancing Patient Experience In Indian Healthcare: A Key Component For Successful Medical Tourism, Elizabeth G. Clark, Elizabeth Ziemba

Visions in Leisure and Business

Post-pandemic, Indian hospital chains have been increasingly expanding their bed capacity, either by constructing new hospitals or acquiring existing healthcare infrastructure in select markets. (1, 2,) A frequent strategy cited for attracting both domestic and international patients is “medical tourism” or “medical value travel.” This paper examines the concept of patient experience and argues that, for India to become a competitive medical tourism destination, hospital operators must prioritize the development and enhancement of patient experience initiatives. By focusing on the quality of patient interactions and care, Indian hospitals can better attract patients from abroad while ensuring sustainable growth and improved …

Optimization Of Dynamic Weapon Target Assignment Considering Random Disturbances, Zhenzu Bai, Yizhi Hou, Zhangming He, Juhui Wei, Haiyin Zhou, Jiongqi Wang

Journal of System Simulation

Abstract: The impact of various random disturbances in the actual command and control environment of unmanned systems on problem modeling and solving of weapon target assignment was considered, and three types of uncertainty disturbance constraints were investigated. A multi-objective dynamic sensor weapon target assignment model was established. By considering the issues of model property changes caused by disturbances and insufficient robustness of the traditional single-operator solving algorithm, a multi-operator constrained multi-objective evolutionary framework based on the deep Q-network was proposed. The algorithm described the convergence, diversity, and feasibility of the population in both the objective and decision spaces. It established …