bluuebunny/crossref_metadata_2025_split huggingface dataset:
Frontier development and prospect trend of HCCI engine
Authors: Zhou Zijun 
Published: December 2023

Abstract
Nowadays, with the rapid development of information technology, the level of science and technology is constantly improving. All fields are developing rapidly. In recent years, the development of the automotive engine industry has been particularly rapid. To cope with increasingly strict environmental requirements and the impact of electric motors on the market, a new engine model is gradually being valued. Homogeneous Charge Compression Ignition (HCCI) internal combustion engine is a new type of engine. It has the technical advantages of traditional diesel and gasoline engines. This combustion mode greatly improves the emission of pollutants and the engine’s overall efficiency. However, there are still certain challenges to this technology at present. But with the continuous improvement and optimization of related technologies. HCCI engines are bound to have broad development prospects. This article elaborates on the current status and development trends of HCCI engines from four perspectives: basic principles, combustion characteristics, emission characteristics, and the latest developments.
Review on 6G-oriented terahertz communication channel
Authors: Pang Yiwei 
Published: December 2023

Abstract
With the large-scale commercialization of 5G mobile communication systems in the world, 6G technology is becoming a new hotspot of global information technology research. The terahertz band (300GHz to 3THz) has extremely rich frequency resources, which can support ultra-high speed wireless communication from 100Gbps to 1Tbps, improve the existing 5G peak transmission rate by one or two orders of magnitude, and meet the requirements of new applications such as ultra-high resolution holographic communication and meta-universe. An in-depth understanding of the propagation channel is crucial to the design of the communication system. This paper summarizes the research status of the terahertz channel, including its characteristics in the atmosphere, the current channel propagation model, and terahertz channel measurement. At the same time, the future research direction of terahertz communication is analyzed and prospected, and the possible challenges in the future research are discussed, which will help promote the application of terahertz communication technology to 6G communication. Due to technical limitations, terahertz channels have not been fully developed and utilized in the field of communication, and there are many technical bottlenecks that cannot be broken. In the future, new channel models may be built, and there will be opportunities for AI-assisted channel measurement.
Optimization of bismuth-doped fiber amplifier gain spectrum based on genetic algorithm in 1200 nm-1600 nm
Authors: Guo Zuohao , Xu Chenyu , Yao Jialing 
Published: December 2023

Abstract
With the continuous evolution of communication technology, and the rapid rise of fiber optic communication in China However, the transmission distance of fiber optic communication is limited due to its fiber loss, so fiber optic amplifier has become one of the key research topics today. Currently on the market is a large-scale commercial bait-doped fiber amplifier, although it has the advantage of low noise and high gain, its effective amplification band is only concentrated in 1530 nm-1620 nm, however, there are many important transmission band amplification there are still research gaps. As a result, the focus of this paper’s research is on optimizing the gain spectrum of a bismuth-doped fiber amplifier at wavelengths between 1200 and 1600 nm using modelling and numerical simulation. The research method of this paper is as follows: first of all, after the literature survey, this topic is using the three-energy level structure, and then collecting the data of pump light wavelength and emission absorption cross-section, signal light emission, and absorption cross-section. fit the data to the graph line, and call the genetic optimization algorithm to derive the gain spectrum optimal value. It’s found that when the pump light wavelength is 1230 nm, fiber length is 2 m, bismuth ion doping concentration is 10.0×1024 ions/m3, the signal light wavelength is 1330 m, its amplifier gain spectrum reaches a peak of 57.17 dB, which is consistent with the results of the three-layer cycle (manual search).
Simulation and analysis of the optical performance of silicon nanowire arrays
Authors: Wang Shanshan , Zhang Yan , Zhu Liping 
Published: December 2023

Abstract
It is the basic operating principle of many optoelectronic sensors with using semiconductor materials to detect light waves for achieving efficient photoelectric conversion. At present, how to maximize the light absorption of materials in broad spectrum becomes one of the key subjects in optical sensing field. In this paper, the antireflective properties of silicon nanowire arrays is analyzed by means of the subwavelength grating principle and the effective medium theory, and the influence of structural parameters on the reflectivity of micro/nano structured arrays under broad spectrum irradiation is simulated by finite difference time domain solutions simulation software system. Theoretical calculation can get knowledge of the variation regularity of diffraction order of micro/nano films. Simulation result can provide theoretical reference for later specific experiments of realizing the morphology evolution of arrays. Combination of two steps, the appearance of higher-order diffraction light can be controlled by changing the structural parameters so as to improve the antireflective properties of micro/nano structured arrays.
Study on interlaminar fracture toughness of unidirectional composites
Authors: Liu Xin , Li Wusheng , Qiao Rui , Guo Wei , Liu Minghong 
Published: December 2023

Abstract
Carbon fiber composite is widely used in the nuclear industry and other fields due to their lightweight and high strength. There are various forms of failure in composite, including resin cracking, fiber fracture, and resin fiber interface debonding. At the initial stage of damage, they all exhibit the form of microcracks. As cracks propagate and fuse, they ultimately lead to macroscopic fracture of composite components. For safety reasons, it is necessary to study the fracture toughness of composite. This article uses a combination of winding method and double cantilever beam method to study the interlayer fracture toughness characteristics of high-strength (or high modulus) fiber epoxy resin composite under type I load. Choose a more suitable propagation GIC as a measurement metric. The results indicate that under the same resin matrix, the interlayer fracture toughness of high-strength fiber composite is much higher than that of high modulus fibers, which is related to the high surface chemical activity of high-strength fiber monofilament. Finally, combined with finite element analysis, its application in laminated structures was briefly analyzed.
Research on the formulation and performance of high-strength resin matrix T1 for wet winding
Authors: Wang Qitao 
Published: December 2023

Abstract
Aiming at the higher requirements on the performance of composite materials put forward by new specialized equipment, the development of new high-performance winding resin is carried out. First, basing on the epoxy curing system, the selection of the main resin has been completed, we select the appropriate curing agent according to the characteristics of the screened trifunctional glycidylamine epoxy resin and trifunctional alicyclic epoxy resin, the ratio is calculated and optimised, the curing system is established, and the design of the resin formulation system is completed. Second, according to the nature of the resin curing system, the toughening method is screened, and the synergistic enhancement of heat resistance and toughness of the resin is accomplished through the core-shell nano-toughening method. Finally, the glass transition temperature of the new high-performance winding resin T1 is 165.12°C, and the fracture toughness of the resin KIC can reach 1.74MPa-m1/2, and the annular tensile strength of the T1 resin-based T700 carbon fibre composites can reach 3500MPa, which meets the requirements of the design indexes of specialized equipment.
Institutional resilience of tourism villages against the Covid-19 pandemic in the Special Region of Yogyakarta
Authors: Putri S P , Permana M 
Published: December 2023

Abstract
This research aims to specifically assess the institutional resilience of tourism villages against the Covid-19 pandemic in four different tourist village categories. This research is qualitative in nature. The data collection was carried out through interviews with the head of the tourist villages, who played a crucial role during Covid-19 pandemic. Content analysis is used as an analytical technique in this study. The results of the study show that each category of tourist village displays varying degrees of institutional resilience when dealing with the Covid-19 pandemic. In this context, the key factors distinguishing institutional resilience in each typology of tourist villages are primarily influenced by leadership and management, innovation, tourist visitor scale, local government support, and the determination of the community as actors in the tourism business. The existence of the Covid-19 pandemic prompted different action plans, scenarios, and policies in each tourist village. Furthermore, the pandemic encouraged tourism villages to innovate continuously such as by developing new tour packages, creating new attractions, revising tourist visit targets, enhancing product marketing systems, and fostering collaborations. The support and innovation from local governments also played a significant contribution in shaping the resilience of tourist villages. In conclusion, the Covid-19 pandemic has provided valuable lessons for tourism villages. The lessons include recognizing their potential and weaknesses, mapping resources for dealing with future disasters, optimizing the use of reserve funds, exploring new business opportunities, and developing the necessary mitigation efforts. These results have practical implications for the development policies of each category of tourist villages in the post Covid-19 pandemic era.
Unveiling Ceratocystis wilt disease: a review of cocoa’s unforgiving foe
Authors: Lloren R 
Published: December 2023

Abstract
Cocoa, a tropical evergreen tree native species to the Amazon rainforest, is a highly favored plantation crop of smallholder farmers and a source of livelihood in tropical lowlands of South America, West Africa, and Southeast Asia. Ceratocystis wilt is one among many fungal diseases that cause economic losses in cocoa production. This narrative review aims to evaluate gaps in understanding Ceratocystis wilt of cocoa. The study utilized the PRISMA framework which serves as guide for a semi-structured review. Through the scientific databases, a total of 202 articles were identified, comprising 51 from the Web of Science and 151 from ScienceDirect. Data extraction was done by categorizing the obtained literature. Results revealed that C. cacaofunesta is an ascomycetes fungus and was first described as C. fimbriata and later re-defined as C. cacaofunesta verified using molecular technique and morphological differences. Its symptoms include leaf chlorosis, and entry of infection is through the wound in the stem caused by contaminated cutting tools and insect attack. As a necrotrophic fungus, it feeds on its host’s nutrients. It is also a homothallic species that can self-fertilise and strive at a temperature between 18 to 28 degrees Celsius. Effective control measures can be costly and negatively impact the environment. However, mitigation measures can be taken, such as exclusion and eradication as preventive measures. This narrative review provides a significant future research undertaking, such as identifying diagnostic protocol for C. cacaofunesta and helping mitigate the disease through providing information dissemination on the farmer’s level for early detection.
The presence of signage in the control of visual pollution in urban areas: A case study in the M.T Haryono street corridor, Kendari City, Indonesia
Authors: Halim  , Ramadan S , Al-Ikhsan A , Ladianto A J , Faslih A , Firdausah A M 
Published: December 2023

Abstract
Signage expanded with the growth of the city, where its presence is required because it is regarded as an effective medium for conveying commercial and non-commercial messages and is also anticipated to be one of the factors that contribute positively to a region’s image. This study seeks to determine the presence of signage, specifically advertising boards, in the corridor of M.T Haryono street, Kendari City, in relation to three factors: the impact of advertisement boards on the visual image of the area, its location, and its design. This approach is used to dig up and reveal the impact of advertising boards existence as elements and physical components of space. The results of the study revealed that the presence of advertising boards along the M.T Haryono road corridor did not contribute to reinforcing the visual theme of the area; its layout was overlapping and unclear; it did not provide clear information on the message it conveyed; its design was neither communicative nor harmonious; it lacked elements of unity with the architectural characteristics of the surrounding buildings; and its presence affected the attention of drivers.
Alternative locations of older people-friendly city park in Bandung City, Indonesia
Authors: Soltip M F , Ramadhani A , Luru M N 
Published: December 2023

Abstract
City parks play a crucial role as essential public open spaces within urban areas. Consequently, a demand exists for city parks that can cater to a diverse range of activities and accommodate individuals from various age groups, genders, and social backgrounds, with particular emphasis on the older population. These parks serve as meeting points and outlets for physical fitness, contributing to the overall well-being of the older population. However, in practice, a substantial number of older population urban residents express discontent with the quality of their city parks. Within the city of Bandung, there are twenty parks that currently do not meet the criteria for being classified as older people-friendly parks. This study is focused on identifying the precise locations of urban parks within Bandung that meet the standards of being older people-friendly. The variables under consideration encompass aspects such as location, accessibility, vegetation, lighting, and available facilities. Data collection was carried out through a survey approach and subsequently subjected to analysis using a scoring technique. The study’s findings indicate that out of the twenty parks examined, eight fulfill the criteria to be designated as older people-friendly city parks. These parks are: Cikapundung Terrace Park, Inclusion Park, Cibeunying Park, Cikapundung Riversport Park, Centrum Music Park, Tongkeng Park, City Hall Park, and Alun-Alun Ujungberug Park. Parks with scores ranging from 17 to 24 points are considered to have successfully met the senior-friendly park criteria.
Allowance allocation and adjustment of factors affecting railway logistics demand
Authors: Yulfadli Z , Arifin M Z , Djakfar L , Wicaksono A , Nafis M A 
Published: December 2023

Abstract
Because of the extra dimensions and weight carried on cargo trucks on Java’s North Coast Road (Pantura), the allowance policy was designed to give a discount on freight transportation services in exchange for government funding to pay the discount. It is relevant to supply and demand. The demand for services can be managed using this policy. The purpose of this research is to go further into the policy’s analysis. The endeavor to manage demand for logistics trucks and trains will be examined in greater depth by developing a regression model with two response variables, namely truck and train logistics transportation demand. Logistics train tariffs, the number of factories in one region, the distance between the industrial center and the nearest Indonesian Railway Logistics Company (KALOG), truck driver wages for one delivery, truck maintenance and operational costs, and the distance from the city of origin to the national capital are all expected to influence demand for logistics trucks and trains. While the Tangerang region has the highest tariff per kilometer and is also the longest distance from the industry center to KALOG, Jakarta has the highest truck operations and maintenance expenses. According to the findings of this study, logistics train prices, the distance between the industrial center and the nearest KALOG, and truck operational expenses all have a major influence on truck and train logistics transportation demand. These major elements have been shown to assist enhance KALOG’s profit while reducing overdimensioning and overloading on Pantura.
Transit Oriented Development (TOD) network arrangement system in the City of Jakarta
Authors: Taki H M , Wicaksono R , Badawi M A 
Published: December 2023

Abstract
The city of Jakarta has grown very rapidly with more than 18.6 million private vehicles passing through it. Around 47.5 million people move in Jakarta and its surroundings, only 24 percent use public transportation. This trend of using transportation that is fast and uncontrollable, but not many people use public transportation. The purpose of this research is to provide direction to the public and the government so that the use of pedestrian-oriented public transportation and mass public transportation through the application of the TOD concept. This research method is descriptive argumentative in nature supported by data sources and processed qualitatively. The results of this study show that the application of TOD to mass transportation systems in Jakarta that currently exist or exist such as Commuter line stops or stations, Mass Rapid Transit (MRT), Trans Jakarta Bus Rapid Transit (BRT), Light Rapid Transit (LRT) has provided convenience and comfort for its users, as well as regional arrangement, passenger flow, and integration between mode. The conclusion of this study is that the TOD system that has been built can connect the downtown area with connected buffer areas via the BRT, MRT and LRT. This transportation system was developed managed by Jabodetabek Transportation Management Agency (PT. BPTJ).
Analysis of pollutant index in Gunung Putri Pond, West Java Province, Indonesia
Authors: Siregar M A , Fachrul M F , Marendra S M P , Hendrawan D I 
Published: December 2023

Abstract
Gunung Putri Pond is one of the lakes in Bogor Regency that functions as water reservoir, agricultural irrigation, fisheries activities, which has an area of 120,645 m2 and a depth ranging from 0.5 to 1.7 m. Gunung Putri Pond is surrounded by residential areas, agricultural land, and several industries which discharge their waste into the lake’s water bodies, including the motorcycle manufacturing industry, industrial equipment suppliers, the automotive industry, and construction companies which directly or indirectly pollute the waters of the lake. The aims is identify pollutant sources that have the potential to pollute waters, analyze water quality, and quality status for Gunung Putri Pond. The research was carried out in March 2023-July 2023. Water sampling was carried out at 6 points using the grab sampling method. The parameters analyzed in this study were temperature, pH, Dissolved Oxygen (DO), Biochemical Oxygen Demand (BOD), Chemical Oxygen Demand (COD), Nitrate (NO3-N), Phosphate (PO4), Iron (Fe), Lead (Pb) and E. coli. The results of water quality Gunung Putri Pond for parameters COD, Fe, Pb and E. coli exceed the quality standards of Government Regulation No. 22 Year 2021 Class 2. The water quality status of Gunung Putri Pond used Pollutant Index (IP) method with an average value of 2.78, which is lightly polluted category.
Potential use of indigenous arbuscular mycorrhizal fungi to improve soil productivity in tailing of tin mining: a greenhouse study scale
Authors: Wulandari D , Maulana A F , Fathikasari I 
Published: December 2023

Abstract
Tin mining is as a critical factor destroying ecosystems and challenging for reclamation. Indigenous arbuscular mycorrhizal fungi (AMF) are well-known for assisting plants growing in harsh environments. This study aimed to (1) isolate indigenous AMF; (2) screen AMF for nutrient uptake and plant biomass; (3) investigate the screened AMF in supporting plant growing in tin tailing. Soils were collected from natural forest and post-tin mining in Bangka. Wet sieving was conducted to obtain spore of AMF. Collected AMF were propagated and screened for phosphorus uptake and plant biomass of tested Sorghum bicolor growing in sterilized sand at greenhouse. Eight best-screened AMF was evaluated using Piper nigrum growing in sterilized tin tailing+10% compost at greenhouse. The new leaf number, phosphorus uptake, and flowering emergence were measured. Trap culture obtained 16 Acaulospora sp., 1 Glomus sp., and 1 Scutelospora sp, in post-tin mining, and 9 Acaulospora sp. in natural forest. Screening of AMF resulted in higher shoot P uptake and biomass than controls. Application of screened AMF on tin-talling showed that four AMF had higher new leaf number, phosphorus uptake, and flower emergence of P. nigrum. These results imply that selected indigenous AMF are potential for future land productivity of post-tin mining area.
Voltage optimization in expansive soil improvement with saline solution on swelling and shear strength
Authors: Darmiyanti D , Rachmansyah A , Munawir A , Zaika Y , Ershandy  , Suryo E A 
Published: December 2023

Abstract
One of the problems in the construction of the road network is the presence of expansive clay and loose soil. In Java, expansive clays are generally the result of weathering rock formations including shale and clay, while soft soils are derived from unconsolidated sedimentation. In situ stabilization of clay with chemical solutions will be difficult due to the very low permeability of the soil. Some researchers exploit the phenomenon of electrodynamics, the nature of the electric and hydraulic coupling to reform clay. This paper examines the experimental results of clay reclamation in the laboratory. The study was carried out on clay from Karawang, West Java province, Indonesia, which was injected with saline solution and used different voltages of 12V, 15V, 18V, and 24V. The success of this experiment will be seen by comparing the mechanical properties of the soil before and after electrochemical spraying. The test results show that electrochemical injection with calcium chloride salt solution and a voltage of 15V can reduce swelling characteristics and increase optimal shear strength.