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Passive design multi-objective optimization for high-performance tropical office buildings: Comparison of four different decision-making algorithms 18

Passive design multi-objective optimization for high-perform...

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18th IBPSA Conference on Building Simulation, BS 2023

作者： Rachman, Arinda Puspita Ichwania, Chalila Atthaillah Mangkuto, Rizki A. Pradipta, Justin Engineering Physics Doctorate Program Institut Teknologi Bandung Bandung Indonesia Engineering Physics Graduate Program Institut Teknologi Bandung Bandung Indonesia Department of Engineering Physics Institut Teknologi Bandung Bandung Indonesia

The implementation of passive design strategies is essential for improving building performance. However, selecting the best passive design solution can be challenging due to the multiple criteria involved. In this study, we compare four different Multi-Criteria Decision-Making (MCDM) methods: WSM, TOPSIS, VIKOR, and COPRAS, for selecting the best passive design solution. The criteria considered include energy use intensity (EUI), percentage of comfort hours (PCH), spatial daylight autonomy (sDA300/50%), and annual sunlight exposure (ASE1000,250). The results show that all MCDM methods provide the same best solution among the design alternatives generated by the optimizer if all criteria are equally important. We also found that WSM and VIKOR suggest similar top 10 alternative solutions, although there are differences in their respective ranking orders. However, if all design alternatives are considered, all evaluated methods suggest a unique ranking of solutions. The findings of this study can help designers and engineers select the most suitable MCDM method for their specific needs and achieve high-performance buildings. © 2023 *** rights reserved.

关键词： Office buildings

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Daylighting design optimization of symmetrical bilateral openings with internal blinds in tropical classrooms using RBFOpt algorithm 18

Daylighting design optimization of symmetrical bilateral ope...

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18th IBPSA Conference on Building Simulation, BS 2023

作者： Hakim, Fahmi Nur Ramadhani, Dhafira Atthaillah Rachman, Arinda P. Mangkuto, Rizki A. Pradipta, Justin Aritonang, Sofhia R. Engineering Physics Graduate Program Institut Teknologi Bandung Bandung Indonesia Engineering Physics Program Institut Teknologi Bandung Bandung Indonesia Engineering Physics Doctorate Program Institut Teknologi Bandung Bandung Indonesia Department of Engineering Physics Institut Teknologi Bandung Bandung Indonesia Department of Architecture Universitas Malikussaleh Lhokseumawe Indonesia

This study explores the potential benefits of daylighting in school classrooms with bilateral opening typology in the tropical climate region, by integrating with a complex fenestration system, namely horizontal and vertical blinds. Sensitivity analysis was conducted to determine the most influential design parameters, and design optimization was performed using the RBFOpt algorithm. Results show that the window-to-wall ratio (WWR) and blind-to-window ratio (BWR) are the most important factors affecting daylight metrics. The optimal WWR range is between 15% and 30%, and the BWR is 100% in both locations. © 2023 *** rights reserved.

关键词： Sensitivity analysis

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Chiral phonon-induced magnetization in cerium fluorides

Chiral phonon-induced magnetization in cerium fluorides

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CLEO: Fundamental Science, CLEO:FS 2024 - Part of Conference on Lasers and Electro-Optics, CLEO 2024

作者： Luo, Jiaming Lin, Tong Zhang, Junjie Chen, Xiaotong Blackert, Elizabeth R. Xu, Rui Yakobson, Boris I. Zhu, Hanyu Department of Materials Science and Nano Engineering Rice University Houston United States Applied Physics Graduate Program Rice University Houston United States

We report that circularly polarized terahertz light pulses can drive chiral phonons, which then induce an effective quasi-static magnetic field on the order of 1 tesla to polarize the paramagnetic cerium fluoride. ... 详细信息

ISBN: (纸本)9781957171395

关键词： Phonons

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Migration and proliferation drive the emergence of patterns in co-cultures of differentiating vascular progenitor cells

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Mathematical Biosciences and engineering 2024年第8期21卷 6731-6757页

作者： Zamora Alvarado, Jose E. McCloskey, Kara E. Gopinathan, Ajay School of Engineering University of California Merced MercedCA95343 United States Graduate Program in Materials and Biomaterials Science and Engineering University of California Merced MercedCA95343 United States Department of Physics University of California Merced MercedCA95343 United States

Vascular cells self-organize into unique structures guided by cell proliferation, migration, and/or differentiation from neighboring cells, mechanical factors, and/or soluble signals. However, the relative contribution of each of these factors remains unclear. Our objective was to develop a computational model to explore the different factors affecting the emerging micropatterns in 2D. This was accomplished by developing a stochastic on-lattice population-based model starting with vascular progenitor cells with the potential to proliferate, migrate, and/or differentiate into either endothelial cells or smooth muscle cells. The simulation results yielded patterns that were qualitatively and quantitatively consistent with experimental observations. Our results suggested that post-differentiation cell migration and proliferation when balanced could generate between 30–70% of each cell type enabling the formation of vascular patterns. Moreover, the cell-to-cell sensing could enhance the robustness of this patterning. These findings computationally supported that 2D patterning is mechanistically similar to current microfluidic platforms that take advantage of the migration-directed self-assembly of mature endothelial and mural cells to generate perfusable 3D vasculature in permissible hydrogel environments and suggest that stem or progenitor cells may not be fully necessary components in many tissue formations like those formed by vasculogenesis. ©2024 the Author(s)

关键词： Endothelial cells

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Ultrafast dynamics of chiral phonons in tungsten disulfide

Ultrafast dynamics of chiral phonons in tungsten disulfide

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CLEO: Fundamental Science, CLEO:FS 2024 - Part of Conference on Lasers and Electro-Optics, CLEO 2024

作者： Lin, Tong Chen, Xiaotong Xu, Rui Luo, Jiaming Zhu, Hanyu Department of Materials Science and Nano Engineering Rice University Houston United States Applied Physics Graduate Program Rice University Houston United States

Linearly and circularly polarized phonons in monolayer WS2 are directly excited by resonant infrared pulses. The dynamics of coherent and incoherent chiral phonons are measured by time-resolved Raman spectroscopy and ... 详细信息

ISBN: (纸本)9781957171395

关键词： Time-resolved spectroscopy

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Metasurfaces for next-generation wireless communication systems

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National Science Review 2023年第8期10卷 17-19页

作者： Younes Ra'di Nikita Nefedkin Petar Popovski Andrea Alù Department of Electrical Engineering and Computer Science Syracuse University Photonics Initiative Advanced Science Research Center City University of New York Department of Electronic Systems Aalborg University Physics Program Graduate Center City University of New York

The pace of development in the world of 5G communication systems has proven to be much more demanding than previous generations, with 5G-Advanced seemingly around the corner [1]. Extensive research is already underway to structure the next generation of wireless systems(i.e. 6G), which may potentially enable an unprecedented level of human–machine interaction [2].

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Multiplexed Nanoscopy via Buffer Exchange

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ACS Nano 2024年第34期18卷 23445-23456页

作者： Chang, Ting-Jui Ben Yang, T. Tony Department of Electrical Engineering National Taiwan University Taipei10617 Taiwan Graduate Institute of Biomedical Electronics and Bioinformatics National Taiwan University Taipei10617 Taiwan Department of Physics National Taiwan University Taipei10617 Taiwan Nano Science and Technology Program Taiwan International Graduate Program Academia Sinica and National Taiwan University Taipei10617 Taiwan

Understanding cellular functions, particularly in their intricate complexity, can greatly benefit from the spatial mapping of diverse molecules through multitarget single-molecule localization microscopy (SMLM). Existing methodologies, primarily restricting the encoding dimensions to color and lifetime or requiring cyclic staining, often involve broad chromatic detection, specialized optical configurations, or sophisticated labeling techniques. Here, we propose a simple approach called buffer-exchange stochastic optical reconstruction microscopy (beSTORM), which introduces an additional dimension to differentiate between single molecules irrespective of their spectral properties. This method leverages the distinguishable photoblinking responses to distinct buffer conditions, offering a straightforward yet effective means of fluorophore discrimination. Through buffer exchanges, beSTORM achieves multitarget SMLM imaging with minimal crosstalk. Direct integration with expansion microscopy (ExM) demonstrates its capability to resolve up to six proteins at the molecular level within a single emission color without chromatic aberration. Overall, beSTORM presents a highly compatible imaging platform, promising significant advancements in highly multiplexed nanoscopy for exploring multiple targets in biological systems with nanoscale precision. © 2024 The Authors. Published by American Chemical Society.

关键词： Stochastic systems

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Nitrogen Pretreatment of Growth Substrates for Vacancy-Saturated MoS2

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ACS Applied Materials and Interfaces 2023年第36期15卷 42746-42752页

作者： Yao, Yu-Chi Wu, Bo-Yi Chin, Hao-Ting Yen, Zhi-Long Ting, Chu-Chi Hofmann, Mario Hsieh, Ya-Ping Institute of Atomic and Molecular Sciences Academia Sinica Taipei10617 Taiwan Department of Physics National Taiwan University Taipei10617 Taiwan Graduate Institute of Opto-Mechatronics Department of Mechanical Engineering National Chung Cheng University Chia-Yi62102 Taiwan International Graduate Program of Molecular Science and Technology National Taiwan University Taipei10617 Taiwan Molecular Science and Technology Program Taiwan International Graduate Program Academia Sinica Taipei10617 Taiwan

Two-dimensional transition-metal dichalcogenides (2D TMDCs) are considered promising materials for optoelectronics due to their unique optical and electric properties. However, their potential has been limited by the occurrence of atomic vacancies during synthesis. While post-treatment processes have demonstrated the passivation of such vacancies, they increase process complexity and affect the TMDC’s quality. We here introduce the concept of pretreatment as a facile and powerful route to solve the problem of vacancies in MoS2. Low-temperature nitridation of the sapphire substrate prior to growth provides a nondestructive method to MoS2 modification without introducing new processing steps or increasing the thermal budget. Spectroscopic characterization and atomic-resolution microscopy reveal the incorporation of nitrogen from the sapphire surface layer into chalcogen vacancies. The resulting MoS2 with nitrogen-saturated defects shows a decrease in midgap states and more intrinsic doping as confirmed by ab initio calculations and optoelectronic measurements. The demonstrated pretreatment method opens up new routes toward future, high-performance 2D electronics, as evidenced by a 3-fold reduction in contact resistance and a 10-fold improved performance of 2D photodetectors. © 2023 American Chemical Society

关键词： Molybdenum compounds

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Design and Implementation of Four Cables Suspended Cable-driven Parallel Robot for Pendulum Batik Machine

Design and Implementation of Four Cables Suspended Cable-dri...

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2023 International Conference on Advanced Mechatronics, Intelligent Manufacture and Industrial Automation, ICAMIMIA 2023

作者： Juwandana, Alfisena Ekawati, Estiyanti Budi, Eko Mursito Radityo Putri, Indah Kudiya, Komarudin Institut Teknologi Bandung Instrumentation and Control Graduate Program Bandung Indonesia Institut Teknologi Bandung Engineering Physics Research Group Departement of Engineering Physics Bandung Indonesia Rumah Batik Komar Bandung Indonesia

ISBN: (纸本)9798350309225

This study researches the fusion of Indonesian traditional batik art with modernity called the Batik Pendulum. A machine based on Cable-Driven Parallel Robot (CDPR) architecture has been developed to automate the process of Batik Pendulum drawing. The suspended CDPR design uses four cables to provide flexibility and space efficiency. An artist may draw rough pendulum patterns utilizing a tablet as a human interface, which are then coded into coordinate-based code and sent to a microcontroller. The microcontroller drives four stepper motors to synchronize the length of the cables. Therefore, the platform carrying the wax can be moved to create the desired batik patterns. The machine was tested by dripping the paint on the fabric along the test path to validate the accuracy of the patterns. The Mean Absolute Percentage Error test results for the x, y, and radius axes were 1.63%, 1.95%, and 6.33%, while the maximum error values in the movement of the x, y, and radius axes were 8.64, 18.3, and 24.08 mm. This research represents a significant step in preserving Indonesia's cultural heritage while embracing contemporary creativity. © 2023 IEEE.

关键词： Microcontrollers

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Simulation of Cable-Driven Parallel Robot (CDPR) for Application in Creating Batik Patterns 8

Simulation of Cable-Driven Parallel Robot (CDPR) for Applica...

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8th International Conference on Instrumentation, Control, and Automation, ICA 2023

作者： Putri, Indah Radityo Juwandana, Alfisena Budi, Eko Mursito Ekawati, Estiyanti Kudiya, Komarudin Institut Teknologi Bandung Instrumentation and Control Graduate Program Bandung Indonesia Institut Teknologi Bandung Engineering Physics Research Group Departement of Engineering Physics Bandung Indonesia Rumah Batik Komar Bandung Indonesia

ISBN: (纸本)9798350301274

The usage of the cable-driven parallel robot (CDPR) is proposed to create a batik pattern. In the proposed CDPR system, the artist can intervene in the pattern-making process to maintain pattern uniqueness. Therefore, to provide the system's flexibility and simplicity, CDPR with four cables will be used where all the cables only connect to the top of the end-effector. The design of four cables with four poles will give a simple structure, and the pole can be moved easily according to the cloth's size, usually in the shape of a rectangle. This flexible design allows the artist to intervene via software or manually push the end effector. In this paper, we explored the cable's length calculation, various path simulations to see system accuracy and flexibility, and the analysis of the CDPR workspace. From the CDPR simulation, we can conclude that the longest cable length needed is 1.22 meters, and the shortest is 0 due to the assumption of the pulley as a point. Implementing inverse kinematics in simulation shows that the end-effector can follow various paths, including straight line, square, circle, diagonal, two-circular, spiral, and planetary orbit. We also calculate the percentage of the area if the pulley has a minimal degree to the pole. With the assumption that the minimal degree is 5°, the %Area we got is 75.6%. © 2023 IEEE.

关键词： End effectors

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