Research Publications (研究出版品)
Research Publications (研究出版品)
"The following are research publications that I have produced independently as well as in collaboration with colleagues. These publications can also be accessed through the embedded DOI or arXiv links."
Quantum Theory and Applications
(量子理論及其應用領域的出版物)
The following are my publications in the field of quantum theory and its applications. To date, these works encompass the connections between quantum theory and condensed matter physics, theoretical quantum optics (TQO), density functional theory (DFT), and the effects of extra dimensions on quantum mechanics.
D. Senjaya and W. D. Tamayanti*, 2026, Density functional theory study of enrupatinib (EI-107) reactivity
compared with previously designed CSF1R inhibitors in Alzheimer's disease (AD)
Categories : Alzheimer's disease, CSF1R inhibitor, Density functional theory analysis
DOI : In preparation of submission in Int. J. Quantum Chemistry (Q2)
Index : Scopus, CAS, and Web of Science (SCI)
In this study, we conducted a theoretical investigation comparing the reactivity of Enrupatinib (EI-107) with established CSF1R inhibitors, namely PLX 3397, PLX 5562, GW2580, Masitinib, JNJ-527, and 7dri, using density functional theory (DFT). The calculations employed the B3LYP exchange–correlation functional with the 6-311G(d,p) basis set to obtain frontier molecular orbitals and perform geometry optimizations of Enrupatinib, representative CSF1R inhibitors, and four active sites within CSF1R (LYS616, CYS666, HIS776, and THR663). Subsequently, cross-checks of reactivity were carried out based on frontier molecular orbital theory (Janak's Theorem) for each inhibitor, each active site, and their cross-interactions. Our theoretical results indicate that Enrupatinib (EI-107) exhibits superior reactivity compared to existing CSF1R inhibitors, while remaining competitive with 7dri.
HOMO-LUMO of each active site of the CSF1R
HOMO-LUMO Interactions between Enrupatinib (EI-107) with each active site of the CSF1R. One can see that Enrupatinib prefers to react with CYS666.
D.Senjaya and S. E. Limantoro*, 2026, Enhancing reconstruction capability of Wavelet Transform amorphous
radial distribution function via machine learning assisted parameter tuning.
DOI : doi.org/10.1016/j.jnoncrysol.2026.124062 (Q2)
Categories : Amorphous solids, radial distribution function (RDF) calculations, formulation of wavelet
transform, and machine learning applications
Index : Scopus, CAS, and Web of Science (SCI)
In this work, we improved the capability of reconstructing the radial distribution function (RDF) of amorphous solids based on wavelet transformation by incorporating machine learning. In this approach, we trained the parameters within the wavelet reconstruction theory using machine learning techniques. As a result, the RDF amplitude and overall trends became increasingly precise. The first and second peaks of the RDF profile, which correspond to the nearest-neighbor interatomic distances, were also determined with greater accuracy. This enhancement enables the derivation and reconstruction of other physical variables, such as the coordination number.
D.Senjaya*, 2025, Non-relativistic quantum particle confined on a cylindrical surface under a Stark-like potential, Spektra: Jurnal Fisika dan Aplikasinya 10 (1), pg. 35 - 52.
DOI: https://doi.org/10.21009/SPEKTRA.101.04
Categories : Quantum mechanical system, RS perturbation theory, and extra dimensional physics analogy
Index : DOAJ, Sinta 3.0, and Google Scholar
In this study, we consider the case of a non-relativistic quantum particle confined to the surface of a cylinder of radius Ro and length L, subjected to a Stark-like perturbation along the z-axis. This system serves as a representative model for the extra-dimensional theory proposed by Kaluza–Klein, which aims to unify electromagnetic theory with gravity. The analysis focuses on whether the Stark-like perturbation along the z-axis can induce energy splitting, and how the curvature geometry of the cylinder influences this splitting. The objective is to provide insight into whether it may be possible to detect extra dimensions through such perturbations, and whether a split mass spectrum could emerge within the framework of KK theory.
D. Senjaya* and A. Zaidan, 2023, Wavelet transform armorphous radial distribution function validation using classical density functional theory with Born-Meyer type potential, AIP Conference Proceedings 2554, 050002. DOI : https://doi.org/10.1063/5.0103690
Categories : Classical statistical mechanics, DFT, and interatomic potential
Index : Scopus, Google Scholar, Web of Science (Proceedings)
We investigated the validity of a new theoretical formulation for reconstructing the radial distribution function of amorphous solids based on wavelet transformation (D. Senjaya, A. Supardi, and A. Zaidan, 2020), using classical density functional theory with Born–Meyer type interatomic potentials (appropriate for short-range interactions). In this study, the comparison between our formulation and classical density functional theory with Born–Meyer potentials shows consistency across both the repulsive and attractive coefficients. This demonstrates that our model is theoretically valid.
D.Senjaya*, A.A. Prabowo, and R. Hartanto, 2023, The study of roselle flower (Hibiscus sabdariffa L.) antioxidants reactivity based on Frontier Molecular Orbital (FMO) theory, AIP Conference Proceedings 2554, 050003. DOI : https://doi.org/10.1063/5.0103686
Categories : Roselle flower, antioxidants reactivity, first-principle quantum calculations, and molecular orbitals
Index : Scopus, Google Scholar, Web of Science (Proceedings)
We investigated the antioxidant reactivity present in roselle flowers by comparing the Frontier Molecular Orbitals (FMO) of the relevant antioxidant molecules with one type of reactive oxygen species (ROS), namely singlet oxygen. The FMO of each molecule was obtained through quantum calculations: density functional theory (DFT) for molecules with medium structural complexity, and semi-empirical Hartree–Fock (SEHF) for structurally more complex molecules. The basis set employed for DFT was 6-311G(d,p), while for SEHF we used CNDO. From our investigation, we identified two antioxidant molecules as the most reactive: Protocathecuic Acid (PCA) and L-Ascorbic Acid (AA).
D.Senjaya*, A.Supardi, and A. Zaidan, 2020, Theoretical formulation of amorphous radial distribution function based on wavelet transformation, AIP Conference Proceedings 2314, 020001. DOI : https://doi.org/10.1063/5.0034410
Categories : Quantum mechanical system, mean-field (MF) approach, statistical mechanics, and wavelet transformation
Index : Scopus, Google Scholar, Web of Science (Proceedings)
We (Senjaya–Zaidan–Adri) have developed a new theoretical formulation to reconstruct the radial distribution function profile of amorphous solids based on wavelet transformation. The wavelet transform serves as a mathematical microscope, allowing us to analyze the scattering function profile of X-ray radiation by the corresponding amorphous material, using wavelet functions that can be designed according to our needs. In this work, we design such wavelet functions based on the general theory of wavelets and employ a mean-field quantum mechanical model similar to the Kohn–Sham framework. The wavelet function derived from this mean-field model consists of two components: the known part, obtained from the Schrödinger equation with a simple potential well, and the unknown part, derived from a semi-empirical model to correct interatomic interactions.
Pandey et al., (2016): Illustration of Agx(GeSe3)1-x
Reducing the first and second peaks error from > 20% (2015 work) to 2.44 - 10.16%.
Indicating that Quantum Mechanical and Interaction approximations works very well
D.Senjaya, 2019, Fast-forward adiabatic dynamics of massless Dirac fermion in 1D Dirac-Weyl semimetal, (Title INA : Dinamika adiabatik fermion Dirac tak bermassa dipercepat pada Dirac-Weyl semimetal 1D), Master's Thesis, Institut Teknologi Bandung, West Java, Indonesia. Link : Digilib ITB
Categories : Quasi-Dirac quantum mechanics (quasi-relativistic QM), condensed matter physics, 1D graphene nanoribbon (GNR), and adiabatic quantum dynamics
In this thesis, we attempt to design an auxiliary potential that can be used to accelerate the adiabatic dynamics of massless Dirac fermions in a one-dimensional Dirac–Weyl semimetal (with graphene nanoribbons as an example) containing a single impurity, by employing the fast-forward (1+1) theory, with the aim of enhancing its electrical conductance. The results show that, through the fast-forward (1+1) framework, electrical conductance can be slightly improved during the manipulation process with the addition of the auxiliary potential.
Starting from the individual solutions for instantaneous states in each region under the case of the adiabatic shifted Coulomb potential—used to represent the manipulation strength of a single impurity in a graphene nanoribbon—I employed the framework of Deffner (2015) to apply the fast-forward theory to Dirac dynamics (1+1). Below is the result of the corresponding fast-forward potential.
To test whether this auxiliary potential produces any observable effects, a field-effect transistor scenario is employed. The electrical conductance is then measured at each manipulation time step using the Landauer formulation.
A. Zaidan et al., 2024 : illustration of GeTe5
D.Senjaya, 2015, Application of wavelet transform for determining radial distribution function of low energy x-ray diffraction, (Title INA : Aplikasi transformasi wavelet untuk penentuan fungsi distribusi radial difraksi sinar X energi rendah), Bachelor's Thesis, Universitas Airlangga, East Java, Indonesia. Link : Repository Unair
Categories : Condensed Matter Physics, Classical Statistical Mechanics, and Wavelet Transform
This work marks the initial development of a theoretical method for determining the radial distribution function (RDF) of amorphous solids based on wavelet transformation. In this thesis, the Paul wavelet of order two, a previously established function, was employed. The Paul wavelet was applied to the structure factor data of amorphous Ge–Te systems, namely (GeTe4)5In95 and (GeTe5). The results show that the Paul wavelet could only predict the first and second peaks of the RDF profile of (GeTe4)5In95, with deviations of 0.40 Å and 0.70 Å compared to AIMD SIESTA results, respectively. For (GeTe5), the deviations were 0.68 Å and 1.02 Å. These findings indicate that the Paul wavelet method was still limited in predictive accuracy. Nevertheless, this study represents the first attempt to employ wavelet transformation in determining the RDF of amorphous solids. In 2017, the author designed a new wavelet function involving a mean-field model inspired by the Kohn–Sham scenario in DFT, which achieved higher accuracy and was published in 2020. Further validation of the theoretical development using classical DFT was carried out and published in 2023.
First attempt to apply Wavelet Transformation to RDF problem. We use directly the so-called Paul Wavelet. The First and Second Peaks still high, and needs some adjustments or physical approach.
Theoretical Physics for Robotics Science (理論物理於機器人學 )
In the context of theoretical physics methods applied to robotics, the following are scientific publications related to the use of Lagrangian and Hamiltonian mechanics combine with system dynamics theory (including stability analysis through the Jacobian and phase-space trajectories).
D.Senjaya* and M.I.Yunus, 2024, Torque criteria for the stable slow-varying 2-DOF Planar Manipulator Robot (PMR) with identical Stokes damping, T. Amrillah et al. (eds.), Proceedings of the International Conference on Advanced Technology & Multidiscipline (ICATAM 2024), Advances Engineering Research 245, pg. 81 - 98. DOI : https://doi.org/10.2991/978-94-6463-566-9_7
Categories : Lagrangian mechanics, manipulator robot, Stokes (viscous) damping, and arm robot torque criteria
Index : Google Scholar, Dimensions, World Cat, and Wang Fang Data
In this study, we examine a planar robot manipulator with two degrees of freedom, where each joint is subjected to identical Stokes-type friction. The equations of motion of the robot are derived using Lagrangian mechanics, and stability analysis is performed through the Jacobian method and eigenvalue evaluation in the case of slow motion. The results yield the appropriate torque criteria required for stable motion. Furthermore, under the conditions of slow motion and identical friction, stability is shown to be independent of the friction coefficient.
Theoretical and Computational Astrophysics (理論與計算天文物理學)
In this context, I will present my publication on the use of N-body codes for simulating the Milky Way (MW) galaxy and the merger of two galaxies (Milky Way and Andromeda / M31), aimed at studying the migration of advanced civilizations and addressing the Fermi paradox from a physical and an astrophysical perspective.
D.Senjaya*, T. Goto, T. Hashimoto, S. Yamasaki, T. Wada, S.-J. Kim, Amos Y.-A. Chen, Y. Uno, S. Gajendran, and T. L. Phan, 2026, A Possible Solution to Fermi Paradox? - The Lethal Impact of Asteroids Collision, Supernovae Explosion, and Giant Molecular Clouds on Alien Migration, Under Review on MNRAS Letters.
Categories : The N-Body Astrophysics Computational Simulation, Physics of Galaxy, Advanced Technological Civilization Migration, Fermi Paradox
Index : Google Scholar, Scopus, and Web of Science
According to Wright et al. (2021), an advanced civilization of Kardashev Type II could rapidly evolve into Type III. This acceleration is facilitated by stellar rotation within galaxies, which brings potential host stars closer together and eases their migration—challenging the Fermi paradox argument about distance and information reach. However, one critical factor remains unaccounted for: could hazardous astrophysical events such as asteroid impacts, supernova explosions, and giant molecular clouds (GMCs) annihilate such civilizations? If so, this would provide a more physical explanation than the Fermi paradox itself. Here, we investigate.
Educational Physics and General Education
(教育物理學和通識教育)
The following publications encompass the development of methods in physics education as well as in general learning. These publications also represent part of my contribution to the field of education.
T. Goto, T. L. Phan, D. Senjaya, and A. R. Barbosa, 2026, Learning Physics from Unphysical Scenes in Anime, Taiwan Physical Society Annual Meeting 2026, Oral Talk Only.
Abstract: tps2026.conf.tw/site/order/1655/PaperPreview3.aspx?pid=0057
T. Goto, D. Senjaya, and T. L. Phan, 2025, Learning Astronomy from Unphysical Scenes in Movies, Taiwan Physical Society Annual Meeting 2025, Oral Talk Only.
Abstract: indico.phys.nthu.edu.tw/event/143/contributions/650/
Students often tire during long physics lectures filled with equations. To re‑engage them, we use sci‑fi films like Star Wars, Interstellar, and Gravity. Each week, students analyze an unphysical scene, explain why it violates real laws, and imagine corrections. This approach sustains attention and deepens learning.
T. Goto, T. L. Phan, and D. Senjaya, 2025, Learning Physics from Unphysical Scenes in Movies, Taiwan Physical Society Annual Meeting 2025, Oral Talk Only.
YouTube : www.youtube.com/watch?v=fPw-nlpJyrw
Students often tire during long physics lectures filled with equations. To re‑engage them, we use sci‑fi films like Star Wars, Interstellar, and Gravity. Each week, students analyze an unphysical scene, explain why it violates real laws, and imagine corrections. This approach sustains attention and deepens learning.
F. S. Resmawati*, Z. A. I. Supardi, E. Erman, and D. Senjaya, 2025, Validity of Empati STEM Learning Model to Increase Scientific Literacy and Technology Literacy, International Journal of Current Educational Research, 4(1), pg. 90-99. DOI : IJOCER
Categories : STEM learning model, scientific literacy, and technology literacy
Index : Scopus, Google Scholar, Dimensions, and Sinta 4.0
Science and technological literacy remain limited in Indonesian vocational schools, requiring interventions that also foster socioemotional skills such as empathy. This study validates the STEM Empathy learning model through an educational development design focused on content and construct validity. Three science education experts assessed lesson plans, textbooks, worksheets, and literacy tests using validation sheets. Results showed high relevance, consistency, and reliability (agreement ≥ 75%). The model integrates scientific and technological literacy with empathy, enabling students to analyze, collaborate, and appreciate science holistically. STEM Empathy offers a novel approach to producing competitive graduates prepared for workplace challenges
I. Gunawan, D. D. N. Benty, V. A. R. Putri, A. H. Mufidah, R. Latifah, Y. I. H. Sari, G. I. W. Tamtama, and D. Senjaya, 2024, How to Be an Effective Digital Charismatic Leader? Evidence from A Bibliometric Historiography, 2024 10th International Conference on Education and Technology (ICET). pg. 6-13. DOI : https://doi.org/10.1109/ICET64717.2024.10778445
Categories : Digital charismatic leadrship and bibliometric historiography research
Index : Scopus, Google Scholar, Web of Science (Proceedings)
To investigate the development status of studies on digital charismatic leader (DCL), the current study applies bibliometric historiographic mapping. Citation data screened from the Web of Science (WoS) revealed 73 documents from 1995 to 2023, which were analyzed using HistCite. Descriptive statistical analysis results revealed three stages of development along with four significantly influential documents in each stage based on the Global Citation Score (GCS). Bibliometric historiographic mapping identified thirty significant documents on DCL studies and categorized them into five clusters including cluster 1 digital transformation, cluster 2 inspiring leadership, cluster 3 influence of DCL on online workers, cluster 4 a computerized approach for leader, and cluster 5 impacts of DCL practice in organizations. Finally, implications, limitations, and future research possibilities of this study are presented.