Digital Commons Network^™

Evaluating The Nuclear Structure Of Some Calcium Mirror Nuclei, Sukaina Falah Hassan, Ban Sabah Hameed

Baghdad Science Journal

In this study, we calculated the binding energy of nuclei, which holds atomic nuclei together, by utilizing electron scattering transformations in the shell model to explore the nuclear structure for proton-rich pairs of mirror nuclei: ³⁴Ca-³⁴Si, ⁰Ca-³⁵P, ³⁶Ca-³⁶S, and ³⁷Ca-³⁷Cl. The proton envelope that surrounds the proton-rich nucleus explains why the nucleus charge and its mirror image have different radii. The wave functions for single particles were adopted from the Skyrme-Hartree-Fock approximation and Wood-Saxon potential to compute the mirror radii, mirror charge radii, and skin thickness for protons …

Study The Effect Of Isospin Dependence And Short-Range Correlations By Using Contact Formalism Through Inclusive Nuclear Structure For 20Ne And 24Mg Nuclei, Farah Faris Kaddoori, Ghaith N. Flaiyh

Baghdad Science Journal

Pair densities and their related correlation functions play a crucial role in capturing the complex many-body interactions within nuclear systems. This study focuses on how spin and isospin specifically influence nuclear charge density distributions. Using the folding model, the charge density is derived through an effective two-body density approach that incorporates both short-range correlations (SRC’s) and tensor correlations (TC’s), while also accounting for spin- and isospin-dependent forces. Calculations were carried out for the elastic electron scattering form factors, F(q), and the root-mean-square (RMS) charge radii, ⟨r²⟩¹ᐟ², of the ²⁰Ne and ²⁴Mg nuclei. The study also examined inelastic longitudinal electron …

A Power Log-Logistic Modified Weibull Distribution: Model, Properties And A Simulation, Jumana A. Altawil

Baghdad Science Journal

This paper deals with a new model called the power log-logistic modified Weibull distribution (PLLoGMWD) using the power transformation method, which can be regarded as an extension of the distribution introduced by Broderick O. Oluyede et al. Several significant statistical properties of the power log-logistic modified Weibull distribution are computed, including reliability, hazard rate functions, reverse hazard function, rth moment, characteristic function, Renyi entropy, conditional moments, and the reliability stress strength model. The distribution function, density function, hazard rate function and reliability of the new model have several interesting properties, which are illustrated in the graphs of each function. The …

Video Summarization Based On The Difference In Statistical Histograms Of Fuzzy Clustering Features, Ekhlas Falih Naser

Baghdad Science Journal

The quantity of video footage produced has skyrocketed in the last several years. The enormous increase in video content creates issues with content management. Video and image processing technologies need to receive greater attention to handle the increasing number of videos on the internet and to extract reliable information from them. Video summaries offer concise and streamlined depictions of the content of a video stream. This research aimed to build a methodology for video summarization utilizing the difference in the histogram of video frames using three stages. Frames were elicited from the video, and then SIFT detectors were utilized in …

Infinitely Many Hidden Attractors In A Simple Six-Term Chaotic 2-Torus Snap System With A Line Of Equilibria, Sarbast Hussein Mikaeel, Irfan Ahmad, Rizgar H. Salih

Baghdad Science Journal

Chaotic systems with simple structures and controllable dynamics are highly desirable for practical applications, including secure communications, signal processing, and nonlinear control. However, most existing systems are too complex or lack flexibility in controlling signal amplitude and polarity. In this study, a simple chaotic snap system is considered that has a line of equilibria and is composed of six algebraic terms, with a single quadratic nonlinearity. In some regions of parameter space, a chaotic attractor coexists with a line equilibrium or with a limit cycle of period-2. The basin boundary of a limit cycle and chaotic attractor is smooth. Additionally, …

Review On Optimization Of Simulation Modeling Strategies For Spacecraft Orbit Avoidance, Guozheng Li, Rui Wang, Shichao Fan, Xintong Cai, Xinyue Zhai

Journal of System Simulation

Abstract: The number of on-orbit spacecraft increases exponentially; the space environment becomes more complex, and the collision risk of on-orbit spacecraft increases significantly. On-orbit safety is thus severely threatened, posing higher requirements for orbit avoidance methods. The costs and risks of space activities are extremely high, making simulation an effective method to solve complex problems of orbit avoidance. The modeling, solution, and simulation methods for the two core issues of spacecraft orbit avoidance, "collision avoidance" and "pursuit-evasion games", were systematically reviewed, and the existing shortcomings were analyzed. The applications of technologies such as deep reinforcement learning in promoting orbit avoidance …

Vehicle Routing Optimization For Underground Mines Considering Fuzzy Demand And Time Tolerance, Guorong Wang, Haishun Deng, Ziming Kou, Xuanxuan Yan, Zhixiang Huang

Journal of System Simulation

Abstract: To solve the problem of material demand fluctuation and different time windows in auxiliary transportation of underground mines, a routing optimization method for material distribution considering fuzzy demand and time tolerance was proposed. Based on the fuzzy credibility theory, uncertain demand was constrained by fuzzy chance constraints, and a multi-objective routing optimization model for underground mine auxiliary transportation was constructed with the objectives of minimizing the total operating cost of vehicles and maximizing time tolerance. A multi-objective genetic algorithm with mixed dominance strength was designed to solve the model. By calculating the deviation difference of Pareto frontier solutions, …

Auv Path Planning Integrating Local-Global Strategies In Unknown Environments, Wenlong Meng, Yanbo Pu, Ya Gong

Journal of System Simulation

Abstract: Existing path planning algorithms often struggle to efficiently explore and generate high-quality trajectories. To address this issue, this paper proposes a path planning algorithm that integrates local-global strategies. By employing the rolling window technique, the global one-time path planning problem is transformed into an iterative process of multiple local planning stages. During the global exploration phase, the rolling window is used to determine high-level path branches and to identify branch waypoints, thereby refining the calculation of local paths. In the local exploration phase, an improved RRT-Connect algorithm is proposed, which combines adaptive circular sampling with dynamic step length to …

A Bilstm+Attention Method For Predicting The Intentions Of Air Combat Targets Based On Multi-Feature Continuous Time Series, Qiuni Li, Dong Wang, Chaozhe Wang, Zongcheng Liu

Journal of System Simulation

Abstract: To achieve advance prediction of enemy target intention, a three-layer air combat intention prediction method based on multi-feature continuous time series and BiLSTM+Attention, including trajectory prediction, threat assessment, and intention prediction was proposed. To prevent the onesidedness of intention prediction results caused by state information at a single moment, prediction was carried out from multiple state features and trajectory information in a continuous time series. An LSTM neural network was used to predict the trajectory of the target aircraft, and the threat assessment of the target aircraft before and after the prediction was conducted. The BiLSTM + Attention model …

Large-Scale Multi-Objective Evolutionary Algorithm Based On Multi-Region Dynamic Grouping, Binhao Liang, Jingxuan Wei, Fengqin Liang

Journal of System Simulation

Abstract: The decision variable dimension of large-scale multi-objective optimization problems can reach hundreds or even thousands. For existing large-scale multi-objective evolutionary algorithms based on decision variable analysis, which usually consume a large amount of computational resources for grouping and fail to consider the interactions between convergence-related variables and diversity-related variables, a large-scale multi-objective evolutionary algorithm based on multi-region adaptive dynamic grouping was proposed. The algorithm employed a Gaussian mixture model to partition the decision space into multiple regions; within each region, feature vectors were constructed for each decision variable, and spectral clustering was utilized to perform grouping. To validate …

Optimization Of Air Defense And Antimissile Firepower Resource Allocation Based On Adaptive Hybrid Evolution, Wei Liu, Delong Chen, Ze Liu, Rui Wang, Kaiwen Li, Tao Zhang

Journal of System Simulation

Abstract: Air defense and antimissile firepower resource allocation is a core optimization problem in modern defense systems. Under complex conditions such as spatiotemporal constraints and firepower resource limitations, this problem involves the optimal configuration of limited interceptors and belongs to the class of NP-hard multi-constrained combinatorial optimization problems. This paper established a comprehensive mathematical model encompassing range constraints, time window constraints, feasibility matrices, and interception probability models. To address the high-dimensional nonlinearity of the problem, an adaptive hybrid evolutionary algorithm (AHEA) was proposed. The algorithm integrated problem-aware initialization, adaptive parameter control, seven specialized neighborhood search operators, and an adaptive strategy …

Mechanism Analysis Of Parasitic Torque In Electric Loading Systems, Xiaozhe Sun, Zhenyu Fu, Zhaoke Xu, Jianxin Li

Journal of System Simulation

Abstract: To address the issues of sources and mechanisms of parasitic torque in electric loading systems for aircraft actuator loads, a functional model of the electric loading system was established. Numerical simulations and Monte Carlo methods were employed to analyze the sources of parasitic torque and its primary influencing factors. The influence mechanisms and degrees of the system's external inputs and internal disturbances on parasitic torque were analyzed and validated through single-parameter and multi-parameter analyses. The results indicate that parasitic torque is predominantly influenced by factors such as loading command frequency, sensor signal bias, and loading motor parameters. In particular, …

Simulation On Water Hammer Characteristics Of Bipropellant Attitude And Orbit Control Propulsion System, Xianwei Lang, Yantao Wang, Fang Zhang, Yizhen Zu, Xinyu Zhang, Weibin Xiang

Journal of System Simulation

Abstract: To address the water hammer problem in bipropellant attitude and orbit control propulsion systems during start-up, shutdown, and periodic operation, the water hammer characteristics under different operating conditions are investigated using simulation methods. The water hammer characteristics of annular and branched propellant delivery lines are compared, and the effects of multiengine interactions under various operating conditions, as well as the influence of water hammer on engine performance, are analyzed. The results show that the attenuation rate of pressure fluctuation in the annular pipeline system is significantly higher than that in the branch pipeline system. Under the condition of multi-cycle …

Intersection Positioning Algorithm With Spatial Translation Based On Sar Scene Matching, Cheng'en Pu, Yumin Lai, Rui Shi, Yan Liao, Kezi Meng, Lifeng Qu

Journal of System Simulation

Abstract: To address the problem that the positioning precision of the inertial navigation system cannot meet the requirements of autonomous positioning when the aircraft flies, an autonomous positioning method with spatial translation based on circular scanning scene matching of SAR was proposed. The spatial translation positioning model of the aircraft was established according to the position of the ground matching points obtained by single point and single circular scanning scene matching of SAR, the oblique distance between the matching points and the aircraft, and the inertial measurement information of the aircraft. The characteristic information of the matching point sequence was …

State Monitoring Of Nuclear Power Connection Sleeve Quality Inspection Equipment Driven By Digital Twin, Yandong Nan, Jinda Zhu, Xinbin Lu, Zhiying Qin, Dandan Qi, Zhiheng Ding

Journal of System Simulation

Abstract: To address the problems of delayed state perception, single monitoring dimension, and insufficient visualization in the quality inspection equipment for nuclear power connection sleeves, a state monitoring method driven by digital twin was proposed. A digital twin-based collaborative state monitoring framework for the inspection equipment was constructed. Based on the OPC UA technology, a multi-source information interconnection model was established. A finite state machine model was employed to discretize and logically drive the inspection process, and a hierarchical verification strategy was proposed to establish a multi-dimensional motion state monitoring mechanism. A surrogate model coupling the radial basis interpolation function …

Design And Application Of Collaborative Simulation System For Satellite Constellation Flight Missions, Dong Yan, Hanzhe Yang, Fangfang Jiang, Chengbao Liu, Peng Zhang

Journal of System Simulation

Abstract: To meet the requirements of the collaborative drill for the ground operation and control system of the satellite constellation, as well as the verification and evaluation of in-orbit complex missions, the design ideas and implementation methods of the collaborative simulation system for satellite constellation flight missions were proposed. By adopting the time correction mechanism of the time-scale distributor, the time synchronization problem among the simulation nodes and the operation and control simulation system was solved. By adopting the communication technology based on improved PDXP + UDP, the problem of cross-node data interface and inter-satellite communication simulation was resolved. A …

Modeling And Simulation Of Target Characteristic Architecture Of Target Missile Based On Dodaf, Tuo Zhao, Yuqiao Liu, Yuan Ma, Yun Cheng, Shen Li

Journal of System Simulation

Abstract: In view of the problems of incomplete elements and missing architecture in the research of target characteristics of target missiles, this paper introduced the panoramic view, operational view, and capability view models in the DoDAF from the perspective of system engineering. According to the view development sequence of "panoramic description, operational decomposition, and capability matching", a target characteristic architecture of the target missile was constructed, which included target elements such as maneuvering characteristics and infrared radiation characteristics. The mapping relationship among "operational layer, capability layer, and target characteristic layer" of the target missile was obtained, and the architecture was …

Overall Design Method Of Low Earth Orbit Communication Satellite Based On Mbse, Jiace Shang, Rui Zhang, Ya Dai, Hua Zhu, Siqi Hu, Linqiang Ge, Chenguang Shi

Journal of System Simulation

Abstract: Drawing on the model-centric design philosophy of model-based systems engineering (MBSE), this study constructs a model architecture suitable for the design and analysis of low Earth orbit communication satellites. This architecture adopts a multi-dimensional matrix approach. Vertically, it traverses the mission layer, system layer, satellite general design layer, and subsystem layer, achieving top-down hierarchical decoupling. Horizontally, it establishes a comprehensive view mapping mechanism covering the domains of requirements, functions, structure, and performance. Integrating the characteristics of product development, a modeling process covering the entire lifecycle—from mission demonstration and overall design to subsystem design and integration verification—has been established. The …

Dynamic Model-Driven Verification Framework For Modular Aerial Bomb Systems, Wenlong Li, Shuhan Sang, Yusheng Liu, Haiyan He, Zan Liang, Wenqiang Yuan, Biao Niu, Weifeng Luo

Journal of System Simulation

Abstract: To address the problems of high verification costs, difficulty in covering dynamic behaviors, and lack of quantitative closed loops in the design stage of modular complex equipment, a dynamic model-driven modular system verification framework was proposed. Based on model-based systems engineering (MBSE) modeling, a structural coupling quantification model was constructed using the number of interfaces, signal interaction frequency, and dependency intensity. Dynamic tests were conducted in high-fidelity virtual simulation to collect data; performance rating for indicators such as accuracy, response, and stability, as well as system's comprehensive rating, were obtained, and the rating feedback was used for iterative optimization. …

Lanthorn, Vol. 60, No. 15, April 20, 2026, Grand Valley State University

Volume 60, August 4, 2025 – April 20, 2026

Lanthorn is Grand Valley State's student newspaper, published from 1968 to the present.

Sheets Of Spectral Data Of Stokes Waves In Weakly Nonlinear Models, Benjamin F. Akers, Ryan Creedon

Faculty Publications

We study the spectral stability of small-amplitude Stokes waves in a family of weakly nonlinear, unidirectional models of the form u_t + Lu + (u²)_x = 0. We introduce a perturbation method to expand the spectral data in wave amplitude near flat-state eigenvalue collisions, with the ratio of the colliding modes as a free parameter. This yields sheets of spectral data whose slices at fixed amplitude give isolas of instability. The same perturbation framework treats both high-frequency and Benjamin--Feir instabilities, extends to discontinuous dispersion relations (including the Akers--Milewski equation), and, for the first time, provides an …

Uptake And Fate Of Silver And Zinc Engineered Nanoparticles In Maize Under Single And Binary Dosing Soil Ecosystems, Lei Xu, Qingbo Yang, Xingmao Ma, Honglan Shi, John Yang, Hu Yang, Samira Mahdi, Ying Wang, Young Shin Jun

Chemistry Faculty Research & Creative Works

Recent agricultural applications of engineered metallic nanoparticles (ENPs) have raised concerns about their uptake and fate in plants. To understand this critical issue, this study investigated the fate and uptake of silver (Ag) and zinc oxide (ZnO) ENPs in maize (Zea mays L.) after single or binary ENP exposure in soil. Results indicated that both Zn and Ag elemental concentrations in roots increased with increasing ENP dosage. Ag NPs in the tissues were detected, but not Zn NPs. Ag NP concentration was 3 times higher in the roots than in the shoots at low Ag NP dosing, while Ag NP …

Trends In The National Resident Matching Program: Shifting Applicant Priorities In The Setting Of Application Limits And Pass/Fail Step 1 Grading, Joshua Morrow, Siena Blackwell, Zibi Gugala, Atul Maheshwari, Peter Boedeker

Faculty, Staff and Students Publications

Purpose: This study evaluated differences in expected and observed proportions of activities, average Step 2 scores, and abstracts, publications, and presentations since the adoption of a 10-experience maximum for residency applications and pass/fail Step 1 grading.

Method: The authors queried National Resident Matching Program data for MD senior applicants from 2016 to 2024 across 22 specialties. Data included average Step 2 scores; research, work, and volunteer experiences; and number of research products for matched and unmatched students by specialty. Repeated-measures multilevel models were used to estimate the difference in observed outcome in 2024 and expected outcome based on trends from …

Analysis Of Students’ Problem-Solving Errors Based On Newman’S Stages In Group Discussions, Ilfi Nur Diana, Nyamik Rahayu Sesanti, Sri Rahayu

Jurnal Pendidikan Humaniora

This study aims to analyze students’ problem-solving errors during group discussions using Newman’s Error Analysis (NEA), while also exploring how social interaction influences error formation. This research addresses a gap in previous studies that predominantly focus on individual error analysis, with limited attention to collaborative learning contexts. A qualitative descriptive approach was employed involving 29 fifth-grade students at SDN Arjowinangun 1, Malang, Indonesia. Data were collected through classroom observations, written tasks, and semi-structured interviews, and analyzed using the Miles and Huberman interactive model, including data reduction, data display, and conclusion drawing. Data validity was ensured through triangulation and member checking. …

Development Of An Educational Book Based On The Intangible Cultural Heritage Of Dendang Lebah And Silat Pelintau As A Means Of Preserving Tamiang Malay Culture, Saiful Bahri, Rina Purnama Sari, Azrul Rizki

Jurnal Pendidikan Humaniora

This study aims to develop an educational book based on the intangible cultural heritage of Dendang Lebah and Silat Pelintau as an effort to preserve Tamiang Malay culture in Aceh Province. The research employed a Research and Development (R&D) approach using the Borg and Gall model. Data were collected through interviews, observations, and documentation. The results of the study indicate that the developed educational book, designed as a teaching material to preserve Tamiang Malay culture, was successfully validated. The book received excellent evaluations across all validation aspects. Content expert validation achieved an average score of 91.75%. Validation by design and …

Development Of Bestari Eco-Environmental Learning Teaching Materials To Enhance Critical Thinking Skills Among Fifth-Grade Students On The Topic Of “My Earth”, Mayna Aryunita, Siti Mayang Sari, Mhd. Syafii

Jurnal Pendidikan Humaniora

This research aims to develop contextual teaching materials based on the "BESTARI" eco-environment framework to enhance the critical thinking skills of 5th-grade students on the topic "My Earth." Utilizing the Research and Development (R&D) method with the ADDIE model (Analysis, Design, Development, Implementation, and Evaluation), the study was conducted at SD Negeri 4 Aceh Tengah. Data collection involved expert validation, practicality questionnaires, and pretest-posttest instruments. Results indicate that the materials achieved a "Very Valid" status (90.6%) and "Very Practical" status (92.3%). Effectiveness tests demonstrated a significant improvement in critical thinking, with a student mastery rate of 88.7%. This study implies …

Creating An Enabling Environment For Digital Learners In Higher Education In Uganda, Patricia Isabirye, Mary-Anne Isabirye

Howard University Journal of African Studies (HUJAS)

The COVID-19 pandemic severely disrupted learning in various institutions in Uganda, which saw the temporary closure of tertiary institutions and the adoption of digital learning, which posed access challenges especially for under-privileged groups. Uninterrupted learning was hampered in various forms for university students due to the lack of affordable digital tools for majority of these learners, inadequate digital facilities within tertiary institutions, and the temporary halt of contact classes by the government. The article explores challenges and opportunities experienced because of the digital approach to learning in Uganda, and proposes user-friendly but affordable solutions to digital literacy, while promoting equitable …

Reading The Room: A Structural Account Of Constraint-Based Processing And Its Limits In Artificial Systems, Griselda Poe

Publications and Research

This paper does not introduce a new structure.

It makes explicit a structural relation implied but not directly stated in prior work.

Human interpersonal processing is grounded in the co-presence of internal constraint and dependency.

These do not exist as separable components.

They form a single structural condition.

This paper shows that what is commonly described as “reading the room” is not a unitary function.

It differs across configurations in how this condition is processed.

In EF configurations, the effect of this condition is expressed through translation into self-return: outputs are evaluated in terms of how they return to the …

Extreme Cf: A Structural Account Of Processing Absence And Category Absence In Cf-Foregrounded Configurations, Griselda Poe

Publications and Research

Existing frameworks of cognition and intervention assume that processing occurs, meaning is available, and evaluation can be applied.

This paper describes a configuration in which this assumption does not hold.

In CF-foregrounded processing where modulation is absent, processing occurs only when coherence is satisfied. When coherence is not satisfied, processing does not occur. Under this condition, no representation is generated, no evaluation applies, and no action selection is produced.

Within single-layer cognitive models, EF and CF are not distinguished. Within such models, CF does not exist as a condition.

This configuration has not been represented as a category within existing …

Fairhiveframes-1k: A Public Fair Dataset Of 1265 Annotated Hive Frame Images With Preliminary Yolov8 And Yolov11 Baselines, Vladimir Kulyukin, Reagan Hill, Aleksey Kulyukin

Computer Science Faculty and Staff Publications

In precision apiculture, the portable digital camera is a cost-effective sensor for capturing hive images or videos used to quantify different colony variables. Openly accessible, well-annotated, interoperable cell-level image datasets are still the exception rather than the norm. This shortage constitutes a major barrier to AI-driven approaches aimed at automating image-based comb analysis. In this article, we present FAIRHiveFrames-1K, a publicly available dataset of 1265 annotated hive frame images (1920 × 1080 PNG) designed to facilitate research in AI-intensive image-based comb analysis automation. The dataset, derived from a 2013–2022 U.S. Department of Agriculture–Agricultural Research Service multi-sensor research reservoir, includes 124,669 …