bluuebunny/crossref_metadata_2025_split huggingface dataset:
Optimization of concentrically braced steel frame structures based on SNI 1726:2019, SNI 1727:2020, SNI 1729:2020, and AISC 341-16
Authors: Aloysius J , Sumito J A , Prayogo D , Santoso H 
Published: November 2021

Abstract
Damages resulted from earthquakes are a loss in the economic sector. The structure of multi-story buildings needs an earthquake-proof design with higher performance to reduce such losses. By utilizing the metaheuristic algorithm, this study aims to identify the most compatible brace configuration and profile used in a concentrically braced steel frame structures with minimal total weight and that will meet the safety requirements. This algorithm is suitable owing to the fact that it is able to find solutions to any known optimization problem either through Particle Swarm Optimization (PSO), Symbiotic Organisms Search (SOS), or Differential Evolution (DE). The performance of these algorithms will demonstrated in a form of comparison through a case study of optimizing a 5-span, 6-story steel frame structure. These systems will determine the lightest frame weight, which also correlates to a lower construction cost, without compromising the constraints of SNI 1726:2019, SNI 1727:2020, SNI 1729:2020, and AISC 341-16. Based on the results of data processing, SOS is shown to achieve the highest algorithm performance compared to PSO and DE.
Investigation of the material mixtures and fiber addition for 3D concrete printing
Authors: Antoni A , Agraputra A , Teopilus D , Sunaryo A H , Mulyadi M M , Pudjisuryadi P , Chandra J , Hardjito D 
Published: November 2021

Abstract
The era of Construction 4.0 is characterized by technological advances used in the construction industry. One of the advancements is the use of 3D concrete printing in construction. However, until now, the development of 3D concrete printing in Indonesia is still minimal. The main challenge is to determine the composition of the material mixtures for making the mortar, having good extrudability but still has sufficient strength. The rapid initial setting time required was also different for the concrete for typical construction. Our previous mixture composition incorporating calcium oxide to accelerate the initial setting time was adequate. However, the extrusion process was still not satisfactory. In this study, the effect of cement to sand ratio, sand particle size, and the addition of synthetic micro-fiber was investigated on the main properties of 3D printing materials, i.e., initial setting time, flowability, extrudability, and compressive strength. It was found that using smaller maximum particle size sand increases the initial setting time. The addition of synthetic microfiber reduces the strength and the workability of the mortar. However, fiber inclusion has advantages as it reduces the possibility of cracking in the printed concrete. The extruded concrete specimens were shown to have significant strength reduction due to lack of compaction, and it was affected by the direction of printing showing orthotropic properties of the 3D printed concrete.
Designing louvers toward optimum daylight performance in Indonesia: a parametric study
Authors: Khidmat R P , Fukuda H , Kustiani  , Wibowo A P 
Published: November 2021

Abstract
Architecture has a strong relationship with the daylight universe. It implicates further occupants’ behaviour toward visual comforts, healthiness, and energy consumption. The daylight simulation in the early phase of design benefits the architect in predicting the possibilities of daylight-related target goals during the design process. A shading system is one of the strategies in approaching passive design to prevent an excessive amount of undesirable daylight intensity. This paper investigates different sun louvers shading patterns and their relation to the Useful Daylight Illuminance (UDI) in the context of Indonesia, presented by incorporating the EPW file of Jakarta. Parametric and multi-objective optimization has been used to optimize, explore, and map the design possibilities based on the louver shading component as dynamic parameters. Rhinoceros and Grasshopper, as parametric-based modelling software, were used as the primary modelling platform, while the Honeybee and Ladybug plugin were used to undergo the daylight-related environmental analysis. The design exploration iterates 2.160 design solutions with a value of dynamic parameters and the targeted UDI value embedded in each. The results show that the solution founded from iteration process has more areas of illuminance within 300 lx to 500 lx by about 15%.
The importance of iterative process in facade design optimization for a green office building in South Tangerang City
Authors: Fitria Dian 
Published: November 2021

Abstract
Currently, climate change and wellbeing provoke buildings to have higher sustainable performance. So, the condition expects that buildings can tackle those issues that benefit and less impact the environment and its occupants. This particular target needs integrated design approach that the role of the iterative process is necessary. The study focuses on the process of facade design for the buildings that are targeted to have sustainable performance. So, the design of the building facades shall be in accordance with the green building standard issued by GBC Indonesia, Greenship NB Version 1.2. The optimization of facade design was conducted based on three parameters: OTTV, daylight, and outside view. The minimum requirements for each parameter are 35 Watts/sqm for maximum OTTV, 30% for a minimum active area covered by daylight, and 75% for a minimum active area with an outside view. One of the aims of this study is to give a depiction of how to conduct a design process by using an iterative way. In addition, it is to identify the critical keys in enabling the building to the requirements.
Comparison of Shibataea kumasasa and Equisetum hyemale as vertical greenery system for thermal and light shade in student’s architectural design studio in Surabaya
Authors: Kristanto L , Canadarma W W , Wijaya E S 
Published: November 2021

Abstract
Vertical greenery system (VGS) is commonly used for facade shading. It has many advantages in its natural aesthetic, air filter, carbon sequestration, and many more. This research is the continuation of the previous research in 2019, which used Shibataea kumasasa as VGS. It was found that using Shibataea as VGS has reduced the indoor air temperature by 0.5-2°C on average, with 5°C maximum temperature difference. On the other hand, it decreased more light (in range 26-95%), made the illuminance of the room lower than the standard requirement. A studio room should have minimum 5% daylight factor or 500 lux, while on the room measurement, the lowest was 20 lux in the morning hours, the highest was only 200 lux in the afternoon. As an attempt to look for vegetation with better performance, this research uses another bamboo species, Equisetum hyemale to be examined and then being compared to Shibataea. The result is that for the thermal shade, Equisetum performs less effectively than Shibataea. As for light shade, the Shibataea reduces more illuminance than Equisetum, thus makes it a less favorable alternative. The balance of thermal-light effective performance maintained by the leaf area index can be the focus of future research.
An investigation into the effectiveness of student-led experiential learning for UG architects and the implications of incorporating AR into such pedagogical exercises
Authors: Wallwork M , Tedjosaputro M A , Xu Weishun 
Published: November 2021

AbstractThis paper focuses on a collaboration between three researchers from two universities in Zhejiang province to explore the pedagogical value of hands-on experiential learning using non-standard materials (in this case, bamboo). The second aim of the project was to explore how Augmented Reality (AR) might be used to improve the efficiency of the learning process for the participants. As a building project, the outcome was largely successful- the undergraduate (UG) student participants were able to construct a 4-metre-tall bamboo structure in the summer of 2020, using active bending, from a 3D computer model, within the timeframe. They were given complete autonomy as part of the project which resulted in problems but also arguably improved the learner autonomy and problem-solving abilities of the respondents over the timeframe. Concerning the use of AR in such projects, this researched identified the value for this purpose but also some very major obstacles, including cost and complexity.
A study of multi-sensory senses in museum virtual-visits
Authors: Damayanti Rully , Redyantanu Bramasta Putra , Kossak Florian 
Published: November 2021

Abstract
In the forced situation of living virtual during the recent pandemic, also human spatial perception needs to develop through experience and senses during virtual activities. People can go to new places using virtual media such as pictures, 360 panoramas, movies, Google Street View, and virtual tours while being physically separated and socially isolated. This also applies to museum visits when visitors can simply observe. This article offers data from a mixed-methods empirical study that examines how three Indonesian museums, Museum Pendidikan Surabaya, Museum Tsunami Aceh and Museum Bank Indonesia Jakarta, altered their perceptions in establishing a feeling of virtual space. The study has undertaken an identification of place descriptors related to senses multi-sensory systems. The respondents are young people in their twenties who have no prior museum experience. It demonstrates that in a virtual spatial experience, the respondents' perceptions are mostly influenced by the sensory system, which gets diverse information from the media, rather than social signals, which are frequently cited as the most important aspects in perceiving locations in real life. The component of familiarity (recalling memory) is also essential in detecting and identifying the sensory descriptors in this study. In a virtual spatial experience, all sensory systems perform differently; in this study, the visual and auditory sensory systems are the two strongest, while the chemical sensory system is the weakest. Virtual visits, although on a lesser scale than physical visits, can benefit from the multi-sensory system, which is crucial in museums.
Empowering female students to be successful professionals in the construction industry
Authors: Liem C. , Sunindijo R.Y. , Wang C.C. 
Published: November 2021

Abstract
The aim of this research is to empower female students who are studying construction related disciplines to be successful professionals in the Indonesian construction industry. The women’s empowerment is in line with the Indonesian Government’s long-term national development plan year 2005-2025. This research also contributes to improving the skills shortage in the Indonesian construction industry which has the biggest market share in Southeast Asia. This qualitative research employs semi-structured interviews with two groups of informants: female students in construction related disciplines and female leaders in the construction industry. A thematic analysis was then carried out to capture their key insights on factors that can empower female students and career success factors for women in the construction industry. The research findings contribute to advancing women’ empowerment principles, originally proposed by the UN Women Report (2018), by proposing four powerful principles to empower female students to be successful professionals in the Indonesian construction industry.
Causes of work accidents and its impact on the road and bridge construction projects
Authors: Latupeirissa Josefine Ernestine , Wong Irwan Lie K , Tiyow Herby C P 
Published: November 2021

Abstract
The work accident of road and bridge construction projects in Indonesia is quite severe. Every year there is always news about work accidents in the project. While the construction of roads and bridges, especially in Eastern Indonesia, continues to be carried out actively by the government. This research purpose of analyzing the causes of work accidents and their impact on the project. Data were collected at the research location, institutions related to the construction of projects, totaling 40 respondents. Based on the results of the analysis with a multiple linear regression method, it appears that 31 variables causing occupational accidents and 13 impact variables arising from accidents still occur and are very influential with high probability values. Four recommendations were made to prevent fatal accidents in the construction of roads and bridges, in Eastern Indonesia, to improve safety conditions in the construction industry.
Probability of willingness to pay road pricing based on the perspective of households in Jakarta
Authors: Bria M , Djakfar L , Wicaksono A 
Published: November 2021

Abstract
The determination of tariff is necessary for a city willing to implement electronic road pricing such as Jakarta. Therefore, this study was conducted to investigate the effect of household characteristics on the willingness and probability to pay more than IDR 20,000. The focus was on those commuting to work within the city where the majority of people work in the formal sector. Moreover, the Willingness to Pay IDR 20,000 was proposed as a variable while age, number of family members, income, vehicle ownership and the work type were used as the explanatory variables. The results showed the general effect of households in receiving ERP rates was low as indicated by the 16.9% recorded. However, family with total members of 4-5 people and owning a vehicle was observed to have a partially great and significant probability to increase the willingness to pay tariffs > IDR 20,000 while those earning income <IDR 5 million and working as private employees were discovered to have contributed negatively and significantly even though the probability was small. There is, therefore, the need for a comprehensive study when determining tariffs and the amount is recommended to be more expensive than public transport.
Fast and controllable synthesis of AB-stacked bilayer MoS2for photoelectric detection
Authors: Wang Shuang , Zhang Yanhui , Zhao Dongyang , Li Jing , Kang He , Zhao Sunwen , Jin Tingting , Zhang Jiaxiang , Xue Zhongying , Wang Ying , Sui Yanping , Chen Zhiying , Peng Songang , Jin Zhi , Liu Xinyu , Wang Jianlu , Chen Yan , Yu Guanghui 
Published: November 2021

AbstractIn recent years, researchers have explored the interlayer stacking structure of the bilayer (BL) transition metal dichalcogenides (TMDCs) and found that it has unique impact on the electrical, optical, and vibrational properties of TMDCs. Unfortunately, the size of BL TMDCs synthesized by the pre-existing methods is not large. In addition, there is not any effective mean to control the number of layers as well as the stack structure. This is the major limiting factor for further exploration of the properties of BL TMDCs. We report a new method for the rapid and controllable growth of AB-stacked BL MoS2. Firstly, the mixed solution of Na2MoO4and NaOH was spun on the sapphire substrate and then sulfurated. The BL MoS2of AB-stacked can be obtained by changing the time of sulfur introduction. The size of the BL MoS2is related to the parameters of sulfur. The maximum size of BL MoS2grown by this method can reach 288μm, and the average size can reach about 200μm, which is larger than the size reported in most articles. In addition, the growth rate of BL MoS2can be clearly increased by the spin-coating growth method and the fastest growth rate is up to 144μm min−1, which is far higher than other published reports at present. Subsequently, a photodetector based on BL MoS2was prepared. The response time of rising edge is about 0.32 ms, and that of falling edge is about 3.2 ms. The detector prepared by us shows excellent photoelectric detection performance. Therefore, the excellent performance of BL MoS2makes it have a broad application prospect in the field of high-performance electronics and optoelectronics.
Preparation and antibacterial activity of graphene oxide/cuprous oxide/zinc oxide nanocomposite
Authors: Li Manna , Chen Zhaofeng , Sun Yu , Wang Fei , Wu Cao , Xu Jiang , Zhang Jianxun 
Published: November 2021

AbstractIn this study, an antibacterial GO/Cu2O/ZnO nanocomposite was synthesized by a hydrothermal synthesis method, and its phase and microstructure were characterized by a series of test methods. The results showed that the synthesized cuprous oxide nanoparticals and the added zinc oxide nanoparticals were uniformly dispersed on the surface of graphene oxide, and did not cause the agglomeration of the nanoparticles. The graphene oxide successfully made enhanced the effective surface area of the metal oxide nanoparticles due to its adsorption capacity and chargeability. Thereby enhancing the antibacterial activity of the nanocomposite, reaching a 100% antibacterial rate.
Microstructural evolution and its influence on oxygen diffusion in yttrium-doped ceria thin films
Authors: Li Jinzhan , Lei Li , Li Limin , Deng Bo , Zhao Gaoyang , Jin Lihua , Li Chengshan 
Published: November 2021

Abstract
Ceria doped with rare earth ions (Ce1−xMxO2−y (y = x/2)), which contain many oxygen vacancies, have become excellent electrolyte materials for solid oxide fuel cells and important buffer layers for coated conductors. In this paper, Y3+ ions were doped into the lattice of CeO2 to form Ce1−xYxO2−y (CYO) thin films regarded as buffer layers to reduce oxygen diffusion on silicon substrates. It was revealed that the CYO films gradually transformed from a complete fluorite structure into a defective fluorite structure with more and more oxygen vacancies as the proportion of Y3+ ions in CYO films increased from zero, and then the defective fluorite structure transformed into rare earth C-type structure when the proportion of Y3+ ions was beyond 0.5. Moreover, at the beginning, the degree of oxygen diffusion showed an uptrend; but after the proportion of Y3+ ions reached a certain value, the degree of oxygen diffusion turned into a downtrend.
Influence of Thomson effect on amorphization in phase-change memory: dimensional analysis based on Buckingham’s П theorem for Ge2Sb2Te5
Authors: Yamamoto Takuya , Hatayama Shogo , Song Yun-Heub , Sutou Yuji 
Published: November 2021

To evaluate the Thomson effect on the temperature increase in Ge2Sb2Te5 (GST)-based phase-change random access memory (PCRAM), we created new dimensionless numbers based on Buckingham’s П theorem. The influence of the Thomson effect on the temperature increase depends on the dominant factor of electrical resistance in a PCRAM cell. When the effect is dominated by the volumetric resistance of the phase-change material

C
=

ρ

c

Δ
x
/
σ

≪
O

(
1
)

,

the dimensionless evaluation number is

B
=

μ

T

σ
Δ
ϕ

k

,

where ρ
c is the contact resistance, Δx is the thickness of PCM, σ and k are the electrical and thermal conductivities, μ
T is the Thomson coefficient, and Δϕ is the voltage. When the contact resistance cannot be ignored, the evaluation number is B/(1 + C). The characteristics of hexagonal-type crystalline GST in a PCRAM cell were numerically investigated using the defined dimensionless parameters. Although the contact resistance of GST exceeded the volumetric resistance across the temperature range, the ratio of contact resistance to the whole resistance reduced with increasing temperature. Moreover, increasing the temperature of GST enhanced the influence of the Thomson effect on the temperature distribution. At high temperatures, the Thomson effect suppressed the temperature increase by approximately 10%–20%.
Theoretical studies of unimolecular decomposition of thiophene at high temperatures
Authors: Naz Erum Gull , Paranjothy Manikandan 
Published: November 2021

AbstractThiophene is an organo-sulfur aromatic molecule present in fossil fuels and alternate fuels such as shale oils and contributes to air pollution via fuel burning. Hence, it is essential to remove thiophene and its derivatives during the refining process. In this regard, experimental and electronic structure theory studies investigating the thermal decomposition of thiophene have been reported in the literature. In the present work, high temperature thermal decomposition of thiophene was investigated using Born–Oppenheimer direct dynamics simulations. The trajectory integrations were performed on-the-fly at the density functional B3LYP/6-31+G*level of electronic structure theory to investigate the atomic level decomposition mechanisms. Simulation results show that C–S cleavage accompanied by an intramolecular proton transfer to C is the dominant initial dissociation step. Acetylene was observed as primary decomposition product and the results are in agreement with previous experimental studies.
Localized electrodeposition micro additive manufacturing of pure copper microstructures
Authors: Ren Wanfei , Xu Jinkai , Lian Zhongxu , Sun Xiaoqing , Xu Zhenming , Yu Huadong 
Published: November 2021

Abstract
The fabrication of pure copper microstructures with submicron resolution has found a host of applications, such as 5G communications and highly sensitive detection. The tiny and complex features of these structures can enhance device performance during high-frequency operation. However, manufacturing pure copper microstructures remain challenging. In this paper, we present localized electrochemical deposition micro additive manufacturing (LECD-μAM). This method combines localized electrochemical deposition (LECD) and closed-loop control of atomic force servo technology, which can effectively print helical springs and hollow tubes. We further demonstrate an overall model based on pulsed microfluidics from a hollow cantilever LECD process and closed-loop control of an atomic force servo. The printing state of the micro-helical springs can be assessed by simultaneously detecting the Z-axis displacement and the deflection of the atomic force probe cantilever. The results showed that it took 361 s to print a helical spring with a wire length of 320.11 μm at a deposition rate of 0.887 μm s−1, which can be changed on the fly by simply tuning the extrusion pressure and the applied voltage. Moreover, the in situ nanoindenter was used to measure the compressive mechanical properties of the helical spring. The shear modulus of the helical spring material was about 60.8 GPa, much higher than that of bulk copper (∼44.2 GPa). Additionally, the microscopic morphology and chemical composition of the spring were characterized. These results delineate a new way of fabricating terahertz transmitter components and micro-helical antennas with LECD-μAM technology.
Effect of sand mining on the flow hydrodynamics around an oblong bridge pier
Authors: Lade Abhijit D , Taye Jyotismita , Kumar Bimlesh 
Published: November 2021

Abstract
Extraction of sand from riverbed has catastrophic repercussions on aquatic animalia habitat, water quality, and the environment. Alongside, physical alterations in the fluvial hydraulics arising on account of sand mining are also worthy of attention. Flows passing over the pits excavated in a channel have enhanced erosive propensity, which can be a cause of concern for the downstream hydraulic structures. The complex nature of flow interacting with the bridge piers after passing over a mining pit is not fully understood. Experiments were conducted to apprehend the effects of a dredged pit on the turbulence flow-field around an oblong pier. Flow was passed in an erodible sand bed rectangular channel having an oblong pier for the first case. In the second case, a pit was dredged in the mobile bed to replicate a mined channel, and the pier was subjected to the same discharge. The streambed at the approach of the pier experiences greater mean bed shear because of dredging. The amplification of the instantaneous bed shear beneath the turbulent horseshoe vortex (THSV) zone at the pier front is almost twice due to channel dredging. The findings can be useful in understanding the streambed instabilities around bridge piers in mining-infested channels.