-
Article
Open AccessSimultaneous Optimization of Launch Vehicle Stage and Trajectory Considering Flight-Requirement Constraints
A conceptual design of a launch vehicle encompasses various disciplines, such as structural design, aerodynamics, propulsion systems, flight control, and stage sizing. This paper focuses on optimizing trajecto...
-
Article
Improvement of Satellite System Integration Process Based on Dummy Panel Method
This paper discusses the process improvement of a satellite system integration based on the dummy panel method. The system integration procedures using a traditional sequential flight model (FM) panel and the ...
-
Article
Open AccessMulti-start team orienteering problem for UAS mission re-planning with data-efficient deep reinforcement learning
In this paper, we study the Multi-Start Team Orienteering Problem (MSTOP), a mission re-planning problem where vehicles are initially located away from the depot and have different amounts of fuel. We consider...
-
Article
Manifold-Based Space Mission Design with Poincaré Filtering Algorithm
This paper presents the application of manifolds for space mission design in the Circular Restricted Three Body Problem, Bi-Circular Restricted Four Body Problem, and Patched-Planar Circular Restricted Three B...
-
Article
Free Final-Time Low Thrust Trajectory Optimization Using Homotopy Approach
This paper discusses the application of the homotopy approach to optimizing the free-flight-time low-thrust trajectory considering the performance characteristics. The trajectory optimization problem is formul...
-
Article
Flush Air Data System Modeling Using DOE-Based Wind-Tunnel Test
This paper proposes a procedure to design a flush air data system (FADS) for a stealth aircraft using wind tunnel testing based on the design of experiments (DoE) technique. The FADS of an aircraft reduces its...
-
Article
Open AccessReconstruction of mandibular defects in osteoradionecrosis and medication-related osteonecrosis of the jaw using fibula free flap and management of postoperative wound infections
Complications from osteoradionecrosis (ORN) and medication-related osteonecrosis of the jaw (MRONJ) include oro-cutaneous fistulas, necrotic bone exposure, soft-tissue defects, and pathologic fractures. The fi...
-
Article
Open AccessA deep learning model based on concatenation approach to predict the time to extract a mandibular third molar tooth
Assessing the time required for tooth extraction is the most important factor to consider before surgeries. The purpose of this study was to create a practical predictive model for assessing the time to extrac...
-
Article
Moment-Based Mass Estimation Relationship for Initial Sizing of Fixed-Wing Unmanned Aerial Vehicles
Accurate preliminary sizing of an aircraft is an essential input for its conceptual design and budgeting procedure. This paper introduces a preliminary sizing method for unmanned aerial vehicles (UAV), which c...
-
Article
Integrated Optimal Guidance for Reentry and Landing of a Rocket Using Multi-Phase Pseudo-Spectral Convex Optimization
This paper proposes integrated optimal guidance for the reentry and landing of a rocket using the multi-phase pseudo-spectral convex optimization method. For a successful return of the launch vehicle, it is cr...
-
Article
Cost Estimation of Earth Observation Satellites Based on Technology-Aware Complexity and Cost Adjustment
This study proposes a concept of the technology-aware complexity, representing the system performance characteristics considering the technological progress. A new procedure to estimate the Earth-observation s...
-
Article
Multi-disciplinary and Multi-objective Design Optimization of a Lunar Rover System with Operational Considerations
This study proposes a framework for designing/optimizing a Lunar rover for an early-phase mission concept trade-off. The proposed framework (1) develops models for major rover subsystems and lunar environment,...
-
Article
Open AccessEfficacy and safety of rhBMP/β-TCP in alveolar ridge preservation: a multicenter, randomized, open-label, comparative, investigator-blinded clinical trial
The aim of this multicenter, randomized, open-label, comparative, investigator-blinded study was to investigate the efficacy and safety of recombinant human bone morphogenetic protein 2 (rhBMP-2) combined with...
-
Article
Open AccessIdentification of de novo EP300 and PLAU variants in a patient with Rubinstein–Taybi syndrome-related arterial vasculopathy and skeletal anomaly
Rubinstein–Taybi syndrome (RSTS) is a human genetic disorder characterized by distinctive craniofacial features, broad thumbs and halluces, and intellectual disability. Mutations in the CREB binding protein (C...
-
Article
Integrated Framework for Staging and Trajectory Optimization of a Launch Vehicle Considering Range Safety Operations
This paper proposes an integrated framework for staging and trajectory optimization of a launch vehicle under a constraint on the instantaneous impact point (IIP) of the separated stage. The proposed framework...
-
Article
Intercept Point Prediction of Ballistic Missile Defense Using Neural Network Learning
This study proposes an algorithm to calculate fast the predicted intercept point (PIP) of the anti-ballistic missile system. A neural network system is trained to learn the motion of the ballistic target to pr...
-
Article
Open AccessMulti-attribute optimization-based system decomposition considering several value chain stakeholder perspectives
The final architecture of a complex system reflect preferences of several value chain stakeholders on system attributes, also called “ilities”. Owing to differences in their individual roles and responsibiliti...
-
Article
Cost-Aware Adaptive Design of Experiment with Nonstationary Surrogate Model for Wind Tunnel Testing
This paper proposes a novel adaptive design of experiment (ADoE) framework with cost-aware sampling strategy and nonstationary surrogate model for efficient wind tunnel testing. The ADoE framework, which is ba...
-
Article
Optimal terminal-time determination for the ZEM/ZEV feedback guidance law with generalized performance index
This paper investigates a problem of determining the optimal terminal-time or time-to-go of the ZEM/ZEV (Zero-Effort-Miss/Zero-Effort-Velocity) feedback guidance law for a variety of orbital intercept or rende...
-
Article
Open AccessThree-dimensional analysis of changes in airway space after bimaxillary orthognathic surgery with maxillomandibular setback and their association with obstructive sleep apnea
Bimaxillary orthognathic surgery with maxillomandibular setback is often accompanied by changes in airway space. We analyzed the changes in airway space before and after surgery and assessed their association ...
