bluuebunny/crossref_metadata_2025_split huggingface dataset:
Sensorless PMSM control system based on luenberger observer
Authors: Gu DaWei , Liu Tingzheng , Yao Yao , Ye Lunkuan , Xu Huang 
Published: May 2023

Abstract
At present, sensorless becomes a research hit for its lower cost and smaller size, among the present sensorless methods, Luenberger Observer has outstanding advantages for its dynamic performance, parameter robustness and high system stability. In this paper, the model of Luenberger Observer which is based on the state equation of permanent magnet synchronous motor (PMSM), and the changes of residence and induce which may lead to the error of the system are also analysed, in order to increase the accuracy of the system, current compensator is also added. In addition, 2 conditions which PMSM runs at low speed and high speed are analysed under the MATLAB model, the results show that the Luenberger Observer has better performance at high speed, but the noisy data of the useful signal is more at low speed.
Long-distance anti-interference self-feedback regulating fire emergency speaker system
Authors: Zhang Hong , Zhu Jinfeng 
Published: May 2023

Abstract
Modern building groups are getting larger and larger, and the lines are getting longer and longer, which directly leads to two major problems. One is that the volume of loudspeakers at the end of the line cannot meet the requirements of normal use. If the power is increased, the loudspeakers near the line will howl and self-excite too much. Second, the power of the power amplifier and the number of loudspeakers cannot be matched exactly. It is urgent to develop fire-fighting loudspeakers or emergency broadcasting systems that can be applied to long-distance transmission, having strong anti-interference ability, and can realize automatic adjustment through feedback. This paper develops a set of intelligent fire broadcast system based on distributed power amplifier, which can realize the following functions: it can connect with other platforms and systems through the big data platform, realize cross-platform, cross-system real-time long-distance playback of the broadcasting system, and solve the problem of terminal volume. By switching channels, power control, etc. Using the near-end strategy optimization algorithm based on tailoring, the optimal joint interference avoidance strategy of the system is obtained to solve the problem of environmental noise interference. Based on the deep reinforcement learning algorithm, the problem of matching the power amplifier power and the number of speakers is solved.
A realistic assessment of the prospect of silicon be replaced by other materials for IC applications
Authors: Yuan Yunyang , Li Zhishan , Wang Zikai 
Published: May 2023

Abstract
Silicon is the most common material used in semi-conductor. It can be used to make single crystal silicon wafer. Though it has the widest usage, silicon has high calorific value. Also, the performance loss is high compared to silicon carbide and the operating temperature is relatively low compared to gallium oxide. Luckily, there are several materials that could possibly replace silicon. The first one is 2D semiconductor. The prospective evaluation of 2D semiconductors is high. But now the biggest problem is the low-resistance connections with them. The second one is gallium nitride. It has high hardness, melting point and stability. This makes it a good material for high temperature, high frequency and high power devices. However, excellent property brings high cost. This disadvantage prevents gallium nitride to be widely used. The last one is graphene. It has strong electrical conductivity, ultra-high strength, excellent electrical properties, and strong electron interaction. It has a higher carrier mobility than silicon. While every coin has two sides, producing graphene on a large scale is difficult and expensive. Besides, graphene is highly reactive with oxygen and heat. What’s more, zero band gap nearly makes it impossible to become a semi-conductor material. Even though there are many methods of opening the bandgap, these methods still bring inevitable drawbacks. All in all, there are still many problems to be solved when new materials replace silicon in integrated circuit applications.
Comparison of logistic regression and random forest algorithms for airport’s runway assignment
Authors: Kanjanasurat I , Jungsuwadee W , Lasakul A , Benjangkaprasert C 
Published: May 2023

Abstract
Various automation systems are currently developed using machine learning techniques. It is used to predict and decide on numerous complex tasks in order to reduce the likelihood of human error. Logistic regression is one of the most widely employed machine learning (ML) algorithm. In this study, the accuracy of logistic regression was compared to that of random forest for the assignment of Suvarnabhumi Airport runways to arriving aircraft. The accuracy of the logistic regression model was determined to be 82%, while the accuracy of the random forest model was 77%. Logistic regression was found to be more precise for predicting the appropriate runway to assign to arriving aircraft.
Kinematic and vertex fitting package for the CMD-3 experiment
Authors: Gribanov S.S. , Popov A.S. 
Published: May 2023

Abstract
In this article, we discuss a new software package of
kinematic and vertex fitting for the CMD-3 experiment at
the VEPP-2000 electron-positron collider. The authors describe in
detail the fitting algorithm, parametrization of four-momenta and
trajectories of various particles and present the results of testing
the fitting pakage using events of Monte Carlo simulation of various
e
+
e
- annihilation processes. The authors also provide several
examples of the fitting package validation using Gaussian
simulation. Although the package discussed in this article is
intended for the CMD-3 experiment, it can also be used in
other experiments. The authors consider the described package as
their first step towards a more universal and rigorous kinematic and
vertex fitting package that can be used in future e
+
e
-
experiments, such as the Super Charm-Tau factory.
Real-time environmental radiation monitoring based on locally developed low-cost device and unmanned aerial vehicle
Authors: Folifack Signing Vitrice Ruben , Mbarndouka Taamté Jacob , Kountchou Noube Michaux , Omgba Abanda Zacharie Stève , Yerima Abba Hamadou , Saïdou  
Published: May 2023

Abstract
In this study, a low-cost local device based on an Unmanned Aerial Vehicle (UAV) for real-time environmental radiation monitoring is proposed. The device consists of a Geiger-Müller ZP 1200 counter for gamma radiation detection and an appropriate electronic circuit for processing and shaping the detected pulses. The Geiger-Müller detector used is low-cost, insensitive to environmental temperature variations, and can be operated continuously over a long period. Two different methods were performed to calibrate the designed device, namely the use of a programmable nuclear pulse generator for electronic calibration and a Cs-137 gamma-ray calibration source. A long flight time UAV is developed locally with suitable characteristics and adapted to carry the radiation detection device. The designed UAV mainly consists of a multi-flight controller having an intelligent switching system associated with a GPS Module for accurate position-keeping and four heavy lift motors. The use of UAVs has the advantage that it allows measurements to be taken over large areas, even those that are difficult to access, and avoids exposing people to radiation. The flight measurement tests were carried out in the urban area of Yaoundé-Cameroon, at an altitude of 15 to 100 meters with a sweeping speed of about 20 km/h for 36 days from January 01, 2023, to February 06, 2023. The tests showed that the concentrations collected varied between 0.00697 μSv/h and 0.8706 μSv/h, of which 85.71% of data have a concentration below the threshold (0.3 μSv/h) and 14.29% above this threshold. These tests confirm that the developed radiation detection system works properly and is suitable for environmental radiation protection and nuclear safety activities.
Study on the linearity of 20'' dynode and MCP PMTs
Authors: Wu Diru , Luo Fengjiao , Wang Zhimin , Li Min , Xu Jilei , He Miao , Yang Changgen , Heng Yuekun 
Published: May 2023

Abstract
The linearity of charge response is an important feature of photomultiplier tubes (PMTs) for physics measurements, especially the newly developed 20'' microchannel plate (MCP) PMT (MCP-PMT). In this paper, in addition to the traditional method of double light sources, we applied another relative method of 20'' PMT to 3'' PMT comparison to measure the linearity of the 20'' dynode and MCP PMTs in pulse mode using a waveform digitizer. The measurements show a good linear response of the two types of 20'' PMTs to 1000 photoelectrons (p.e.). The correlations of the amplitude, rise-time, fall-time, FWHM, baseline recovery, overshoot, and the amplitude ratio of late-puse of the 20'' PMTs were derived from the waveform analysis, where the MCP-PMT shows very different features compared to the 20'' dynode-PMT.
Physics design, fabrication, RF measurement and beam commissioning of a dual beam drift tube linac
Authors: He T. , Wan C. , Liu Z. , Zhang H. , Lu L. 
Published: May 2023

Abstract
A novel type dual-beam drift tube linac (DB-DTL) prototype was firstly designed to prove
the feasibility of the multi-beam type DTL at the institute of modern physics. The physics design,
cavity fabrication, low-power RF measurement, RF conditioning and beam commissioning of the DB-DTL
cavity were completed and presented in this paper. Operating at 81.25 MHz, the DB-DTL was designed
to accelerate 10 mA proton from 0.56 MeV to 2.5 MeV. The field distribution of the DB-DTL cavity
were measured at low RF power level and particle tracing using measured field were done, which
both agree well with the physics design. The measured Q
0 value and the shunt impedance are
11606 and 172 MΩ/m, respectively. The RF conditioning and the first beam commissioning of
the DB-DTL cavity were completed. The beam experiment platform was built at the Lanzhou university
due to the academy research cooperation between the institute of modern physics, Sun Yat-sen
university and Lanzhou university. Based on the existing experiment condition, 2.5 MeV proton
acceleration and measurement were successfully achieved at 42 kW (0.85*Q
0)) RF power of the
DB-DTL cavity, which match the physics design very well.
Ecotourism in the City: A Strategy to Promote Sustainability
Authors: Aryantie M H , Fauzi R , Saragih G S , Junaidi E , Kayat  , Hidayat O 
Published: May 2023

Abstract
The research was conducted to support Sustainable Development Goals number 11 and 15. It proposed a new ecotourism attraction in Kupang city, East Nusa Tenggara, Indonesia. Currently, the only scientific tourism site in Kupang is the Oelsonbai Forest. It is a tourist destination with specific visitor characteristics. Oelsonbai functioned as a place for research, ex-situ conservation, and the development of a scientific tourism model. In accordance with its designation, visitors to the Oelsonbai consist of two major groups, namely the research group and the education group. The grounded research results found that Oelsonbai Forest has not been fully explored, and the tourist attraction is concentrated in the Timor deer enclosure, the Rote snake-necked turtle captivation, and the sandalwood nursery. However, 41 bird species from 23 families were found in Oelsonbai and 23% are Timorese species. The diversity of birds in Oelsonbai is a potential object of ecotourism. Birdwatching is an option to add to Kupang’s beach-dominated tourist activities. Based on visitor characteristics, the area potency, and the Oelsonbai’s designated function, birdwatching can be developed as a new ecotourism product in Kupang. This step is a strategy to maintain Kupang as a sustainable city by managing the urban forest ecosystem.
Analysis the Added Value of Sustainable Tilapia Fish Industry of Value Chain Actors in North Sumatera
Authors: Marisa J , Syahni R , Hadiguna RA , Nofialdi Nofialdi 
Published: May 2023

Abstract
The purpose of this research/study is to identify the actors involved in the value chain, analyze the added value received by each actor, and analyze the value chain of business actors who get the most benefits and related parties in the Toba Samosir Regency. The data analysis used in this research is in the form of qualitative and quantitative data analysis. Qualitative analysis is conducted to describe and analyze the actors involved in the value chain of the tilapia business. Quantitative research is carried out to calculate the costs and benefits used to determine the added value of the business. The results of this study are the flow pattern of the tilapia business value chain, starting from fish cultivators to consumers. The actors involved in the value chain consist of fish farmers, wholesalers, processors of tilapia, and distributors. The added value obtained by each tilapia value chain actor is 18.08% for tilapia cultivators, 5.31% for collectors, 60.76% for tilapia fillet processors, and 15.85% for tilapia fillet processors distributors. The business actor getting the biggest profit in the value chain is the fish processor, Rp. 102,048,667,500 per kg.
The effect of Exserohilum rostratum NMS1.5, Xylariaceae sp. KKL3 and zeolite/chitosan on non-contaminated and contaminated soil
Authors: Hidayat Endar , Khaekhum Saranya , Harada Hiroyuki , Mitoma Yoshiharu , Yonemura Seiichiro 
Published: May 2023

Abstract
This work examined the influence of endophytic fungi strains Exserohilum rostratum NMS1.5 and Xylariaceae sp. KKL3 mixed zeolite/chitosan (ZL-CH) on non-contaminated and contaminated azo dye AR88 soil. The experiment used a randomized complete block design (RCBD) with the LSD test (p<0.05) for 10 treatments consisting of 50 grams of soil (non-contaminated) and 50 grams mixed 5 mg/L of azo dye AR88 (contaminated soil), 0.1-gram ZL-CHand 2 mL of each endophytic fungi. We conducted it under aerobic conditions at room temperature. After 14 days, soil pH, organic carbon (SOC), available P, and cation exchange capacity (CEC) were measured. The statistical analysis showed a significant difference between treatment and control (soil only). We found that Exserohilum rostratum NMS1.5 and Xylariaceae sp. KKL3 increases soil pH, available P, and cation exchange capacity, then slightly increases when added ZL-CH. However, the treatment with Xylariaceae sp. KKL3 was better than Exserohilum rostratum NMS1.5 for SOC. However, the best treatment was obtained in the absence application of azo dye AR88 for available P and CEC.
Rice production forecasting model in West Kalimantan with factors are rainfall and harvest area
Authors: Aprizkiyandari S , Palupi T 
Published: May 2023

Abstract
Rice production in West Kalimantan fluctuates due to many factors, including harvested area and rainfall. This research aims to form a forecasting model for rice production in West Kalimantan, which is expected to provide an overview of the future and help anticipate the decline in rice production. The research was conducted in the city of Pontianak, West Kalimantan. The data used in this study from BPS-Statistics West Kalimantan, namely rice production, rainfall, and harvested area. The forecasting method used is a multiple linear regression analysis model that ignores random effects and the second model is a panel data regression analysis model that considers random effects. The results showed that the panel data regression analysis model was better in forecasting rice production in West Kalimantan with a goodness of fit is 99%. The results of the panel data regression line plot forecasting show a pattern almost similar to the actual data, with a MAPE value of 7,68%, which means the forecasting results are highly accurate. Based on the result of forecasting with panel data regression model show that the first to third highest rice production forecasting are Sambas, Ketapang and Kubu Raya districts.
Increasing Rice Production of High Elevation Irrigated Rice with Several Location-Specific Technology Packages
Authors: Girsang Setia Sari , Purba Tommy , Girsang Moral Abadi 
Published: May 2023

Abstract
Humbang Hasundutan District is the 9th rice producer in North Sumatra and has the opportunity to increase rice productivity from the 2019 harvest area of 16.3 thousand hectares, which can contribute to 68.2 thousand tons. This potential can still be increased if there is a significant change in attitude and technology adoption. Based on the results of interviews with several farmers who have ≥ 10 years of experience in rice farming in the Humbang Hasundutan District, the problems of rice farmers are still using local varieties that are not qualified and certified; productivity is still low (4.17 t/ha), conventional technique, low human resource capacity, and unavailability of professional farmer institutions. The technology packages introduced in this activity were 7 packages, 3 packages using the Inpari 28 (T1 = NPK, T2 = NPK + Org, T3 = NPK-low P), and 4 packages of local varieties (T4 = NPK, T5 = NPK + Org, T6 = NPK-low P, T7 = farmer) with 4 replications. The study aims to obtain an effective and efficient technology package for increasing rice production in high-elevation irrigated rice. The results showed that the recommendations are packages Inpari 28 with application NPK with low P (T3) and NPK (T4) can increase rice production by 273% and 215% with B/C ratio of 1.72 and 1.23, respectively, compared to the farmers. To support the results, farmers should return 100% of the straw after harvest, plant population> 200,000, young seedlings <20 days after seedling (DAS), proper pest control, and market orientation.
Food Logistic System Policy in Central Java
Authors: Widowati Eny Hari , Risandewi Tri , Hasiholan Bistok , Pertiwi Miranti Dian 
Published: May 2023

Abstract
The regional logistics system known as sislogda is one of Central Java’s leading priority programs to achieve food security and competitiveness. Food availability in Central Java is not continuous, causing price disparities. The implementation of the rice commodity sislogda concept is not yet known. This research aims to Analyze the application of the food sislogda concept policy, the supply chain of food commodities, and the problem of food characteristics for Sislogda. The research was conducted in Central Java, with sample locations in the Regencies of Grobogan, Brebes, Wonogiri, Magelang, and Sragen—data collection techniques using FGDs and surveys with related parties. The analysis used is descriptive and qualitative. Result: 1) Implementation of the Sislogda concept policy can be carried out in Central Java because it has regulations as a driving force for sislogda in the form of sustainable land, water supply, insurance for rice farming and production facilities, capital, and human resource development; 2) Supply Chain: Rice commodities: farmers, grain traders, rice milling units (RMU), Logistic institution service (Bulog_, rice traders and consumers; ii) Red chili and Red Onion: farmers, village collectors, sub-district collectors, wholesalers, consumers; 3) Problems: i) Commodity of rice, preparing products according to SNI standards by logistics actors is still difficult because the partnership between logistics actors has not been written yet, ii) Commodities of red onion and chilies that cannot be produced can cause price disparities between seasons. Conclusion: Regional logistics system (sislogda) for food can be implemented by spurring the implementation of policies. Prepare the availability and quality of food with the standards that have been set and carried out by logistics actors with a written partnership
Effect of land flooding in controlling weeds to several rice varieties in System of Rice Intensification (SRI)
Authors: Dwipa Indra , Rozen Nalwida , Kasim Musliar 
Published: May 2023

Abstract
Rice is still a main carbohydrat source for almost Asian people. The System of rice intensification (SRI) method is one effort in increasing rice production. In cultivating rice in this method, weed is the main problem. The research aimed to study the effect of land flooding to control weeds in rice field by using various rice varieties. The research was carried out in public rice field, Kuranji district, Padang, Indonesia. It was conducted from July-September 2019. A block randomized design was used as method in the study. The treatment was rice varieties: Batang Piaman, Panca Redek, PB 42, Batang Pasaman, and Saganggam Panuah. These treatments were replied to three times. The result showed 15 weed species were found in the experiment. According to Summed dominance ratio, Echinochloa crusgalli was the most dominant species in the field (28.05%). For plant height, Saganggam Panuah was the best variety (86.00 cm), and Batang Pasaman was the best one (20.50) for a number of the tiller.
Callus induction of Calotropis gigantea using BAP and 2,4-D in vitro
Authors: Muthi’ah A , Sakya A T , Setyawati A , Samanhudi  , Rahayu M 
Published: May 2023

Abstract

Calotropis gigantea is a plant not widely used but has potential as a medicinal plant. The phytochemical compound can be produced faster using a tissue culture and a combination of growth regulators. The research objectives were to study the effect and determine the best concentration of BAP and 2,4-D in callus induction of Calotropis gigantea. This research was carried out in the Plant Physiology and Biotechnology Laboratory, Faculty of Agriculture, Sebelas Maret University, from September to November 2021. A month-old Calotropis gigantea stem was used as an explant. The research used three replicates of a completely randomized design with 25 combination treatments. The culture medium was MS with BAP (0; 0.5; 1; 1.5; 2 ppm) and 2,4-D (0; 0.5; 1; 1.5; 2 ppm) supplements. Parameters observed in this research were callus formation time, callus colour, and callus texture. The results showed that a combination of BAP 0.5 ppm + 2,4-D 1.5 ppm could induce callus faster than other treatments, 6 days. Callus morphology with green color and compact texture resulted from a combination of BAP 1.5 ppm + 2,4-D 1.5 ppm treatment.
Physical and Chemical Characteristics of Alginate Extracted from Sargassum sp
Authors: Irianto Hari Eko , Giyatmi Giyatmi , Fransiska Dina , Nuraelah Almira 
Published: May 2023

Abstract
Scientists have proved alginate which is extracted from brown seaweed, to be able to reduce blood glucose levels in mice. These results indicate that alginate has health benefits. Sargassum sp. is a brown seaweed growing wildly in Indonesian waters and is considered a prospective source of alginate to be developed and used for various purposes. This study aimed to explore the potency of alginate production using Sargassum sp. as raw material, particularly to reveal the physical and chemical properties of alginate obtained. Alginate was extracted using a method developed by Ref. [1]. During the extraction process, alginate yield was determined. The alginate was analyzed for physical parameters (whiteness degree and viscosity) and chemical parameters (moisture content, acid insoluble ash content, ash content, fat content, and protein content). Results showed that the yield of alginate was 20.30%. The whiteness degree and viscosity values of alginate were -31.53 and 47.25 cPs, respectively. At the same time, the moisture content, insoluble acid content, ash content, fat content, and protein content of alginate were 11.76%, 2.28%, 27.55%, 0.18%, and 0.76%, correspondingly. The alginate was classified as low viscosity and suitable for processing various foods, including functional food, by taking the health benefits of alginate.