bluuebunny/crossref_metadata_2025_split huggingface dataset:
Study on Active Disturbance Rejection Control of Permanent Magnet Synchronous Motor Based on Variable Structure Extended State Observer
Authors: Yang Huaizhi , Meng Xiaoli , Zhang Xufei , Zhu Huaqiang 
Published: June 2023

Abstract
Linear extended state observer (linear extended state observer, LESO) is the core component of linear active disturbance rejection control (linear active disturbance rejection control, LADRC), and its performance is critical to the control effect. The linear ADRC is applied to the speed loop of the permanent magnet synchronous motor control system with a double closed-loop control strategy. By adding a scale factor to the linear extended state observer, the utilization efficiency of the observed signal and the observation speed is improved. On this basis, a hybrid switching strategy is adopted to achieve a smooth transition between the traditional ESO and the improved ESO, avoiding the motor speed imbalance and motor chattering caused by direct switching. Finally, the improved ADRC strategy and the traditional ADRC strategy are compared and analyzed through simulation, which verifies the effectiveness and superiority of the improved strategy.
Marine Power System Thrust Distribution Based on Grey Wolf Optimization Algorithm
Authors: Yang Xiaoting 
Published: June 2023

Abstract
The ocean is rich in Marine minerals and other resources. To make effective use of these resources, it is indispensable to have good resource exploration and mining equipment, and more attention is paid to ship control methods. A dynamic positioning system can control the position and head of the ship. Thrust distribution is an important part of the DP system, and its performance will have a significant influence on the reliability and accuracy of the system. To settle this matter, a ship thrust distribution method based on the grey Wolf optimization algorithm is offered. Aiming at the research of thrust distribution of ship DP system, a dynamic positioning simulation model is established, which is combined with the grey Wolf optimization algorithm. The results show that the control effect is good.
Multi-Time-Scale Volt/var Control in Distribution networks with the Coordination of PV Inverters and Capacitor Banks
Authors: Huang Fengbiao , Cheng Dengfeng , Zhang Yuan , Kang Weiwei , Hong Min 
Published: June 2023

Abstract
With the increasing penetration of photovoltaics (PVs) in distribution networks, PV inverters and capacitor banks (CBs) should be well utilized for volt/var control and tackle fluctuations and uncertainty introduced by PVs. This paper proposes a multi-time-scale volt/var control method to coordinate PV inverters and CBs, where the complementarity between the minute and second-level control promotes the economic and secure operations of distribution networks. Firstly, the model of volt/var optimization (VVO) is constructed to minimize network losses and CB operations, and PV inverters are set to reserve some reactive regulation capacity used for real-time control. According to VVO, the model predictive control is carried out to consider future fluctuations, which decides the current 5-minute control for all devices to achieve economic operations. To avoid second-level uncertainties resulting in possible voltage violations, the real-time control further adaptively adjusts MPC control values, which rapidly drives the reactive power regulation abilities of all PV inverters to ensure voltage security and maintains that the control results almost do not deviate from the MPC results to ensure economy. Case studies based on a modified 17-node distribution network verify the effectiveness of the proposed method.
Distributed Autonomous Economic Control Strategy for DC Microgrid
Authors: Xue Fei , Zhou Lei , Ma Xin , Wu Meirong 
Published: June 2023

Abstract
A distributed autonomous economic control strategy is proposed to realize the economic operation of the DC microgrid in the islanded state. The control strategy first introduces incremental cost in primary control, but due to the influence of line impedance, it is not possible to precisely achieve the consensus of incremental cost at each unit, and it generates a steady-state error. To overcome this problem, a distributed secondary control based on a dynamic consensus algorithm is designed on the basis of primary control, which makes each distributed generator operate under equal incremental cost. The two layers of control strategies cooperate work together to realize the hierarchical-distributed autonomous economic operation of the DC microgrid. Finally, the simulation model of the DC microgrid is constructed, which verifies the effectiveness of the proposed method.
Performance simulation of plate-and-tube evaporative cooling frost-free heat pump heat exchanger
Authors: Yuxin Ren , Lin Cao 
Published: June 2023

Abstract
To verify the operational feasibility of the plate-and-tube evaporative cooling frost-free heat pump heat exchanger and its influence factors, a single plate-and-tube was selected as the simulation object, and the VOF model, RNG k-ε model, and self-programmed UDF program were used to control the water vapor transfer mass to verify the influence of air flow rate on the internal flow and heat and mass transfer law of the model. The results show that as the air velocity increases, the percentage of turbulent flow inside the model increases, and the solution coverage on the surface of the plate and tube decreases slightly; the heat and mass transfer increases with the increase of the flow velocity, and the latent heat, sensible heat, and total heat exchange increase with increase the of the flow velocity.
Short-term wind power prediction model based on improved ACA-GRU neural network
Authors: Han Xiao , Zheng Songsong , He Zhenwei , Huang Jiuping , Che Liang , Li Lili 
Published: June 2023

Abstract
To improve the accuracy of wind power forecasting, the improved ACA (Ant Colony Algorithm) is used to optimize the GRU (Gated Recurrent Unit) model. First, the original power generation data is normalized; Second, the GRU neural network model is established, and the ant colony algorithm is used to optimize it; Finally, the optimized GRU model and the non-optimized model are used to predict the short-term wind power output, and the prediction results are compared to verify that the improved ACA-GRU prediction model has higher prediction accuracy for short-term wind power output.
Research on Energy Efficiency Loss of Typical Distribution Network Equipment by Compound Power Quality Disturbance
Authors: Fu Yu , Zheng Zhiyao , Shen Zilun , Yin Zhongdong 
Published: June 2023

Abstract
The development of modern science and technology causes increasing problems of power quality, such as the wide application of impact and nonlinear loads represented by power electronic devices, the emergence of a large number of single-phase users in the low-voltage distribution network, and the start and stop of various large power-using equipment. It makes the problem of power quality in the power system more and more serious. The problem of power quality will not only reduce the efficiency of the equipment in the power system and shorten the life of the equipment but also lead to an increase in the distribution network loss. The level of power loss is related to the economic benefits of the majority of users and power enterprises and is also an important reflection of social benefits and energy consumption status. Currently, most domestic and foreign research is on single power quality disturbance, but the actual low-voltage distribution network contains complex problems of power quality. Therefore, it is important to study the additional loss of key equipment in the low-voltage distribution network and LV distribution network under multiple power quality disturbances. Based on single power quality disturbance, the accurate calculation of additional loss of key equipment caused by compound power quality is further deduced and verified in the simulation platform. This paper further deduces the accurate calculation of the additional loss of key equipment caused by compound power quality and verifies the model with MATLAB/Simulink simulation.
Cellulolytic Bacteria as Decomposers in Dry Empty Fruit Bunches Composting
Authors: Gusmawartati  , Sari P R 
Published: June 2023

Abstract
Empty fruit bunches (EFB) contain macro and micronutrients, so they can be used as compost. EFB takes a long time to be composted because it has high cellulose. Used cellulolytic bacteria decomposers are a solution to boost EFB composting. The goal of this research is to get cellulolytic bacteria with a high potential for accelerating composting and producing high-quality compost. The study used a completely randomized design with several types of cellulolytic bacteria and was repeated three times. Data is presented in qualitative and quantitative formats. The qualitative data were analyzed descriptively, the quantitative data were analyzed using analysis of variance, and the Honestly Significant Difference (HSD) test was run at a 5% significance level. Temperature, volume shrinkage, color, smell, C-organic, N-total, C/N ratio, and pH parameters of the compost were analyzed. The results showed that the application of cellulolytic bacterial isolates could improve the quality of OPEFB compost (in accordance with SNI Compost Quality Standards: 19-7030-2004) and speed up composting time. Consortium I was the best treatment with reduced compost volume up to 74.53%, decreased C-organic content up to 23.32%, increased total N content up to 1.88% and decreased C/N ratio up to 12.44.
Introducing New Varieties to Increase Garlic Production and Determining Its Economic Feasibility in Toba Regency
Authors: Parhusip D , Marpaung I S , Nainggolan P , Sebayang L , Siagian D R , Haloho L , Saragih J 
Published: June 2023

Abstract
Garlic is one of the vegetable commodities whose demand is increasing in tandem with the total population. Until now, national production of this commodity is unable to meet demand. In addition to the import strategy, the local government is attempting to implement an extensification strategy (by increasing total cultivation area) to address this issue. One of the actions in this strategy is the introduction of two garlic varieties, Lumbu Hijau and Sangga Sembalum. From August to December 2020, this study was carried out in Gurgur Experimental Garden, Tampahan Sub District (Toba Regency). The goals of this study are to determine the suitability of these varieties based on their vegetative and generative performances, as well as to conduct a cost-benefit analysis. The results show that the Lumbu Hijau variety outperforms the Sangga Sembalun variety in terms of growth and production. There is a statistically insignificant difference between these varieties in terms of plant height and number of leaves, but there is a significant difference in stem height. According to the B/C ratio analysis, Lumbu Hijau variety has 1.26 more shares than Sangga Sembalun variety has 0.84, respectively. This output indicates that garlic commodity development in Toba Regency is still feasible by improving cultivation management for better production.
EZY TO SPRAY (Eco-enzyme for Tobacco Spray): Utilization of Eco-enzyme as an Agent to Eliminate Cigarette Smoke Odor
Authors: Sirait A F , Azzura Z A , Matondang M R , Simanjuntak T C , Ichwan M 
Published: June 2023

Abstract
Cigarette smoke contains carcinogenic residues such as volatile organic compounds and polycyclic aromatic hydrocarbons that stay on surfaces and can be released into the air causing stains and unpleasant smells. The use of chemical cleaners and deodorizers may cause other health and environmental consequences. Eco-enzyme from organic waste such as fruit peels and vegetables left over are one of the organic innovations that are commonly used to remove odor. In this study, we introduce the use of eco-enzyme in the form of spray and evaluate the effectiveness of eco-enzyme spray to eliminate cigarette smoke odor. This research was an experimental organoleptic test involving 20 human subjects, female, older than 18 years old, and have normal olfactory function to rate the cigarette smoke odor intensity after being sprayed with eco-enzyme. Data were analyzed with the Kruskal-Wallis test and continued with Post-Hoc test. We found that the difference in the concentration of eco-enzymes made a significant difference in the intensity of the smell of cigarette smoke (p=0,000, p<0,05), with the highest average score 3.95 at a concentration of 1:3. In conclusion, the eco-enzyme spray is capable to eliminate cigarette smoke odor using 1:3 concentration.
An Analysis of Artificial Lighting’s Relation to Visitors’ Activity Place in Coffee Shops: Towards Enhancing Regional Development
Authors: Novrial  , Hidayat H F , Affif A M 
Published: June 2023

Abstract
The presence of coffee shops as a common social and public space resulted in the need for it to be flexible and accommodating places. To make a room comfortable and functions properly, it’s lighting must be able to accommodate various activities within the space. The coffee shops are not only advantageous for the people involved directly, but it also helps regional development. Coffee shops have been one major contributor to the local economic development. Artificial lighting is lighting that comes from manufactured light sources such as lamps. This study aimed to determine the relationship between artificial lighting to the visitor’s activity in coffee shops which includes the light’s intensity, color temperature, and distribution. The method used in this study is a mixed method by distributing 100 questionnaires to coffee shop visitors and field observations. The data collected were then analyzed using descriptive analysis methods. The study’s results indicate that artificial lighting affects visitor’s activity. Areas with higher light intensity, light color within the white spectrum, and a more even light distribution have more activity variety.
A Review of the Role of Intermediate Partners in the Community Participatory Mapping Project at Slum Upgrading Settlement
Authors: Handayani K N , Dianingrum A 
Published: June 2023

Abstract
Surakarta has put a lot of effort into promoting civic engagement. Numerous projects have been taken out since 2017 to help the local government with the upgrading of the slum community on the Kali Pepe and Bengawan Solo River riverbanks. The initiation comes from grass root programme. Clarifying the function of intermediary actors in the administration of participatory mapping on slum improvement projects is the goal of this study. The initiatives were based on the writers’ experiences while working on several community engagement programs for project upgrades between 2018 and 2022 at Surakarta City (Solo). The information is gathered through field research that is done concurrently with project execution. Selected participatory mapping projects included four case studies. The Kampung Layak Anak Project was run by Urban Rural Design and Conservation (URDC Labo) and ARKOM Solo in 2017, The Green Kampung Project was run by URDC Labo UNS and SIBAT Sewu in 2018, Bangkit Berbarengan was run by URDC Labo and ARKOM Solo in 2020, and Mojo’s participatory mapping of a children-friendly environment (2022) are just a few examples. Several participants were involved in the neighborhood data collection process, and participatory mapping technologies were applied. It will explore these conflicts to look at the role intermediate partners play in empowering communities. Since participatory mapping pertains to both top-down and bottom-up methodologies, the findings primarily focus on the ambiguity of participation in the context of Solo. Another conclusion highlights the role of intermediary actors, such as academics, ARKOM, KOTAKU, and Sibat Sewu, in efforts to restructure urban areas.
Processing and Utilization of Natural Resources of Gulamah Fish with Boiling and Steaming Method
Authors: Harahap H , Manurung R , Iriany  , Yustira A 
Published: June 2023

Abstract
This study aims to utilize marine products to be processed into useful and economically valuable products. This research activity was carried out in Sentang Village, Teluk Mengkudu District, Serdang Berdagai Regency. The choice of this location is because it is near the sea and has the potential for abundant natural resources of marine products. Fishermen’s catches do not all have a selling value, for example, small fish such as gulamah fish. In this study, gulamah fish was used as a raw material in the process of making the fish meal. Fish meal is processed by boiling and steaming methods. The fish meal obtained will be analyzed for its nutritional value in the form of water content, protein content, fat content, and salmonella. Fish meals using the boiling method produced better fat content than the steaming method, namely 5.44%, while fish meals using the steaming method produced better water content and protein content than the boiling method, namely 5.52%, and 6.35%. but, Fish meals with a positive steaming method contain salmonella bacteria.
SWOT Analysis and Marketing Mix 4P Model as a Method to Develop Strategic Plan for Newly Marketed Agricultural Corn Seed Product
Authors: Dermawan M , Rini E S , Sembiring M T , Budiman I 
Published: June 2023

Abstract
The Province of Sumatera Utara is one of the corn producers in Indonesia. Demand for agricultural products especially corn and corn products keeps steadily increasing. The use of quality seeds will certainly be able to increase the yield productivity of corn farmers to fulfill the increasing demand. In the observed company object, the newly marketed NK corn seed product faces various strategic obstacles. By considering several things such as not achieving sales targets for similar products in the past, changes in environmental conditions after Covid-19, and competition with products that existed on the market, it is necessary to have a strategic plan for marketing this product. A method that can be used to identify the marketing conditions that will be faced by the newly marketed product is SWOT analysis with a focus on the 4P marketing mix model. With this method, the identification of Strengths and Weaknesses is carried out together with the company’s internals, while the identification of Opportunities and Threats is carried out with company stakeholders and product users. Followed by, determining the appropriate type of strategy used by using the Internal Factor Analysis Strategic (IFAS) and External Factor Analysis Strategic (EFAS) Matrix analysis procedures. The results obtained are in the form of recommendations for strategic plans that need to be implemented to win the market competition and achieve the expected targets. Another result gives the hint that the strategic plan recommended also brings socio-economic impact to the farmers.
Effect of Good Corporate Governance, Company Size, and Voluntary Disclosure on Cost of Debt in Healthcare Companies Listed on the Indonesia Stock Exchange (Period 2017 - 2021)
Authors: Alhady M A , Risanty  
Published: June 2023

Abstract
This research takes the role of determining which factors can reduce the cost of debt in health companies listed on the Indonesia Stock Exchange. The sample observed in this study consists of 14 companies chosen by purposive sampling out of the population of 24 health corporations on the Indonesia Stock Exchange. The covid-19 pandemic caused an economic contraction, this increased debt financing. Debt that is not managed properly is reflected in the expansion in requests for Postponement of Debt Payment Obligations (PKPU), PKPU can later be a sign that the company is on the verge of bankruptcy. Due to this risk, there is an urgency when a health company goes bankrupt, the wider community will be affected because companies that provide offers related to health services will be limited and increase in the price of available health services. This phenomenon can threaten economic sustainability for the whole society. The determination of the study demonstrates that voluntary disclosure and partially independent boards of commissioners have a considerable detrimental impact on the cost of debt. The cost of debt, in contrast, is unaffected by management ownership, institutional ownership, or company size.
Understanding Diospyros rumphii Bakh from North Sulawesi through Long-read sequences analysis using MinION Oxford Nanopore Technologies
Authors: Salindeho R A , Dwiyanti F G , Pratama R , Matra D D , Majiidu M , Fatlan K F , Siregar I Z 
Published: June 2023

Abstract

Diospyros rumphii (Ebony) is a high-value timber species native to Indonesia, which is listed as a Data Deficient species by the International Union for Conservation of Nature (IUCN) Red List of Threatened Species. Therefore, additional data to enrich knowledge on the distribution, ecology, and genetics of this species is urgently needed. Furthermore, this study aimed to generate whole-genome sequencing data, including the low-coverage data for D. rumphii using MinION Oxford Nanopore Technologies (ONT). The sequence data generated from leaf and cambium genomic DNA was assembled to result in a draft of the chloroplast genome and constructed the phylogenetic tree based on partial nucleotide sequences of the rbcL gene. The results showed that DNA sequencing of D. rumphii generated a 3.25 Gb of long-read sequences data and a draft of a partial chloroplast genome with a size of 150,578 bp. Genetic relationship analysis using the rbcL gene showed that D. rumphii was positioned in one clade with Diospyros oblonga, which has a bootstrap value of 87% suggesting that the rbcL gene can be considered as recommended molecular marker for genetic analysis of D. rumphii in the future.
Molecular Identification and Antimicrobial Potency of Probiotic Lactic Acid Bacteria Pado (Fish Fermentation) Nagari Balingka IV Koto District-West Sumatra as a Functional Food
Authors: Anisah  , Harun H , Jannah H , Amelia R , Purwati E 
Published: June 2023

Abstract

Pado, indigenous cuisine from the region of West Sumatera, is a mixture of fish with the meat seed of Simuang (Pangium edule Reinw) and grated coconut fermented for 4-8 days. Pado is thought to contain lactic acid bacteria (LAB) activity used as a probiotic-producing functional food which is good nutritional value. Based on it, Pado had the potency to improve the economy which had a good impact on regional development. This aims to decide the molecular identifications and antimicrobial activity of LAB as probiotics contain in Pado that are useful as functional foods. The sample used as material for this research is Pado from Nagari Balingka IV Koto District in Agam Regency-West Sumatera. The research methods are bacterial isolation from Pado, determinate LAB using laboratory analysis, and LAB identification using the 16S rRNA method. The result of Gram staining showed Gram-positive that the purple rod-shaped. The other characteristics of Pado isolate were homofermentative, catalase-negative, resistant to acidic pH, and bile salt. The colony of Pado LAB has a white-beige smooth-convex surface. Pado Nagari Balingka IV Koto is a functional food that contains the probiotic Lactobacillus plantarum strain SRCM 102737 and it had antimicrobial activity against pathogen bacteria.