bluuebunny/crossref_metadata_2025_split huggingface dataset:
Improvement of Estimation Accuracy of Body Motion Based on Muscle Potential Signal
Authors: Shingo Yoshino , Shoshiro Hatakeyama , Masami Iwase , Jun Inoue 
Published: April 2020

Abstract
The purpose of this research is to develop a man-machine interface that changes machine impedeace based on surface myoelectric potential. The impedance model of the wrist joint is constructed from the measured data to derive the moment of inertia, viscosity coefficient and rigidity of the human’s wrist joint, investigate the relationship between human joint impedance and electromyography (EMG), according to the change of EMG from the relationship, We have developed an interface to change the mechanical impedance of the robot arm. We investigate the relationship between human joint impedance and EMG, and apply the sparse modeling method to the modeling process. We have created an interface to change the mechanical impedance of the robot arm based on the model.As a result, myoelectric potential and force data have been acquired. Also, mechanical impedance has been acquired.In this study, we improve the estimation accuracy of physical motion by selecting characteristic parameters and terms using sparse modeling, which is considered to be feasible by estimating the force that occurs at the same time as the position at the time of physical movement.
Advanced Driver Assistance Based on Front-View and Rear-Side-View Scene Analysis
Authors: Cheng Hsu-Yung , Yu Chih-Chang 
Published: April 2020

Abstract
This paper proposes a high-performance advanced driver assistance system that analyses front-view driving scenes and rear-side-view scenes. Dense optical flow analysis is calculated for both views to extract motion information. The system performs ego-lane position identification via an effective fuzzy system and indicates if the vehicle is driving on an inner or outer lane. Extracted flow intensities are utilized as the input for deep convolutional neural networks to issue warning events. The front-view event warning system is more responsive to various types of potential approaching dangers because there is no need to detect vehicles first. The rear-side-view scene analysis provides safety check for vehicle doors. Optical flow information and neural networks are also used for rear-side-view scene analysis. The experimental results have shown that the proposed methods can effective detect events or dangerous conditions and help increase the safety of the drivers and road users.
Study on Regional Division of Air Traffic Management in Mainland China in the Future
Authors: Hua XIE , Ye WANG , Minghua Zhang 
Published: April 2020

Abstract
With the problems of poor coordination and frequent flight delays among major air traffic control regions in mainland China becoming increasingly prominent, a series of air traffic control reform measures are imperative. In order to meet the development need of the transition from a large civil aviation country to power one in the future, it is necessary to divide the air traffic management regions reasonably in advance. Therefore, based on the flights between the airports from 2011 to 2017, this paper combines the grey prediction algorithm with the gravity model and considers the impact of high-speed rail on the flights of civil aviation, then constructs the grey gravity prediction model. According to the forecast result of the future airport flow by the grey gravity prediction model, the flight plans of each airport are generated by using the equal proportion enlargement method. On the basis of the flight plans of each airport, the flight situation in mainland China at a certain time is simulated. According to the simulated aircraft longitude and latitude data, the optimal clustering results are obtained by using the fuzzy C-means clustering algorithm and clustering validity evaluation index. Finally, the clustering results are processed by clustering boundary recognition algorithm, the future air traffic management regional division results in mainland China are obtained. The experimental results show that the prediction accuracy of the grey gravity prediction model considering the influence of high-speed rail is better than the traditional grey prediction algorithm, and the original seven major air traffic control zones in mainland China are re-divided into three major air traffic control zones: North China, South Central China and Northwest China, which can provide reference for future air traffic control reform and development.
Adopting tree improvement into agroforestry system: a case study of introducing improved Acacia mangium in community-based forest in Pacitan, East Java
Authors: Nirsatmanto A , Kartikaningtyas D , Sunarti S , Setyaji T , Handayani B R , Surip  , Mangkuwibowo F 
Published: April 2020

Abstract
Tree improvement is a part of breeding development practices for producing genetically improved stock. Beyond the success on realizing the high productivity, products from tree improvement need some prerequisites for adopting in its operational, such as sitematching, fertilizer, spacing, monoculture and other silviculture practices, some of which are difficult to be fulfilled by the small grower under agroforestry system. As a result, the improved stocks are not commonly planted in small grower’s land. However, in supporting the development of productive agroforestry system, adopting tree improvement into agroforestry practices is necessary. This paper presents a case study of introducing the improved Acacia mangium in community-based forest in Pacitan, East Java. The site planting for this program was selected by considering the fact of the long history of traditional planting of Acacias in community-based forest in Pacitan accompanied with the increasing demand of the Acacias wood for home industries. The program was started at 2012 with the slogan of “planting and manage with your own available resources”. There are four main steps for achieving the goal of programs: 1) introducing improved stock through free distributing the seedling, 2) supervising and monitoring the growth and economic value, 3) establishing seed orchard, 4) autonomous on improved seed production for further replanting. After 6 years, this program revealed that while maintaining a high productivity and economic value, improved stock of A.mangium from tree improvement program could be successfully planted in smallgrower’s land under sustainable agroforestry practices with low cost of silviculture practices.
Land suitability for Persea americana as one of multi-purpose tree species at community agroforestry land in Langkat District North Sumatra Indonesia
Authors: Rahmawaty  , Frastika S. , Rauf A. , Batubara R. 
Published: April 2020

Abstract

Persea americana or commonly call as alpukat in Indonesia is one of Multy Purpose Tree Species (MPTS), found in agroforestry land in Langkat District, North Sumatra. This study aimed to map the distribution of land suitability for P. americana in Langkat District, North Sumatra, Indonesia. This research was conducted by survey method to collect soil samples based on land unit in the field. Land unit was obtained from overlay some maps (land use map, soil map and slope map) using Geographic Information System (GIS) in the research location. There were ten land units in the study area. Land suitability was evaluated based on the matching method. The GIS also was used to map the distribution of land suitability. The results showed that the actual land suitability classes for P. americana were moderately suitable (S2) and marginal suitable (S3). Moderately suitable with area 11.20 ha (0.1%) in Land Unit 8. This area has limiting factor in water avaibility (wa), root zone medium (rc), and erosion hazard (eh). Marginal suitable is located in several places, i.e. Land Unit 1, 4, 5, 6, 7, and 9 with wa was limiting factor (10,022.88 ha; 88.96%); Land Unit 2 and 10 with wa and rc were limiting factor (926.48 ha; 8.22%); and Land Unit 3 with wa, rc and eh were limiting factor (308.19 ha; 2.73%).
Morpho-anatomical adaptation of lesser yam (Dioscorea esculenta) on different planting pattern and relative light intensity in Java community forest
Authors: Sawitri  , Primananda E , Budiadi  
Published: April 2020

Abstract
Lesser yam (Dioscorea esculenta) is traditionally cultivated as a valuable crop species in a various planting pattern of teak-based agroforestry (AF) system in Watubonang village, Sukoharjo District, Central Java. Different planting pattern contributes to various light intensity which is associated with plant morphological and anatomical changes and directly affect to yam tuber production. Research site was selected by mean of purposive sampling method with three yam planting patterns, i.e. yam monoculture (Y), yam in trees along border (TAB) and yam in full teak trees (T-Y), in three replicates of 20 m x 20 m plots. In each plot, four subplots were established to investigate relative light intensity and take leaf samples. Changes in morphological and anatomical characteristics of yam to different planting pattern and relative light intensity (RLI) were studied, including leaf size, leaf color, tendril and internode length, chlorophyll content and stomatal density. The result showed that RLI were significantly different among planting pattern (Y: 78.66%, TAB: 66.94%, T-Y: 34.05%). Planting pattern and interaction between planting pattern and RLI significantly affected yam morphological and anatomical characteristics (of leaf size, tendril & internode length, and stomatal density) at P < 0.05. Leaf size, tendril and internode length increased with decreasing of RLI in TAB, but opposite adaptation was found in T-Y planting pattern. Higher RLI resulted in reductions of chlorophyll a and chlorophyll b content, and therefore increased of chlorophyll a:b ratio. Leaf color of yam grown under high RLI (Y) were light green, while those grown under shaded condition with relatively low light intensity (TAB, T-Y) were dark green that may related to the foliar chlorophyll content. Hence, a trend of decreasing stomatal density was found associated with lower RLI (Y: 35 stomatal/mm2, TAB: 25 stomatal/mm2, T-Y: 19 stomatal/mm2). Approximately 50-60% of RLI is suggested to be an optimum intensity for yam cultivation to support yam tuber production. Agroforestry practice by applying pruning and managing planting density are needed to reach the optimum light.
Silvicultural and economic aspects on combination of vegetatives (Falcataria moluccana-Sorghum bicolor L.) and terrace methods in the different slope lands
Authors: Karyati  , Santoso A E , Syafrudin M , Karmini  
Published: April 2020

Abstract
The vegetative and mechanic methods are soil and water conservation technology to prevent surface run off and soil erosion as well as protect soil nutrient. The study objectives were to know silvicultural and economic aspects on combination of vegetatives between Falcataria moluccana (sengon) and Sorghum bicolor L. (sorghum) and terrace methods in a steep slope (>25-45%) and a very steep slope (>45%) lands. The silvicultural parameters measured were healthy plant, survival rate, stem diameter, and height increments of sengon trees and sorghum’ yield. The economic aspect was analyzed to calculate the cost, revenue, and profit of the application of sorghum as intercropping plants in vegetative method. The healthy plant of sengon and sorghum reached 80-89% (good), survival rate of sengon reached 80-89% (good) and sorghum reached 90% (very good), stem diameter and height increments of sengon trees reached 2.90 cm year−1 and 2.06 m year−1, and the height increment of sorghum was 45.55 cm month−1 in the steep slope (>25-45%). In the very steep slope (>45%), healty plant of sengon and sorghum were 70-79% (moderate) and 80-89% (good), survival rate of sengon and sorghum was 80-89% (good), stem diameter and height increments of sengon were 2.43 cm year-1 and 1.73 m year−1, and height increment of sorghum was 33.05 cm month−1. Total cost, total revenue, and profit of the vegetative (sengon and sorghum) and terrace methods combination in the steep slope (>25-45%) were Rp9,181,128.47 ha−1cs−1; Rp1,800,000.00 ha−1 cs−1; and (-)Rp7,181,128.47 ha−1cs−1, respectively. In the steeper ground (>45%), this application expended total cost as much as Rp9,181,128.47 ha−1cs−1, total revenue as much as Rp650,000.00 ha−1cs−1, and profit as much as (-)Rp8,531,128.47 ha−1cs−1. Although sorghum was not profitable economically as intercropping plant in agroforestry system (sengon-sorghum) in different slope lands for short term, the method combination between vegetative (sengon-sorghum) and terrace techniques could useful to soil and water conservation as well as environmental aspect for long term.
Species test of Mulberry plants on agroforestry land for silk yarn quality improvement in Bali
Authors: Sasmita N , Purba J H , Komara L L , Yuniti I G A D 
Published: April 2020

Abstract
Mulberry plants are tested on agroforestry land because of its well adaptation. The agroforestry model is a combination of sengon (Falcataria moluccana) and mulberry (Morus sp.) plants. The selected mulberry plants consisted of three species, namely M. alba, M. cathayana and M. nigra. The study objective was to determine the best mulberry species leaves as silkworm feed to produce quality cocoons on agroforestry area in Bali. The test was carried out in a complete randomized design (CRD) with the species treatment of M. alba, M. cathayana and M. nigra. It consists of three replications each. Each replication consists of 100 silkworms. The variables observed in this study were cocoon quality and thread/fibber including the percentage of larvae which become a cocoon, the percentage of normal cocoon, cocoon weight, cocoon skin weight, ratio of cocoon skin and fiber length. The results showed that the maintenance rendement (%) was M. alba (70%), M. cathayana (62,0) and M. nigra (60,5), weight of cocoon (g), was M. alba (1,47), M. cathayana (1.53) and M. nigra (1.41), Weight of filaments (mg) namely M. alba (30,12), M. cathayana (25,35) and M. nigra (26,25 ), and the rolling strength of silk thread, namely M. alba (97.45), M. cathayana (74.11) and M. nigra (69.27). M. alba, M. nigra and M. cathayana mulberry leaf species grown from agroforestry patterns can be used to feed silkworms. The mulberry cropping pattern type both monoculture and agroforestry did not show a significant difference in the silkworm cocoons quality and quantity. The highest maintenance rendement is silkworm fed by M. alba, second is M. cathayana and third M. nigra. M. nigra and M. cathayana compared to M. alba did not show significant differences in cocoon weight, cocoon skin weight, percentage of filaments and rolling strength of silkyarn.
Development of cloud-based bioacoustics monitoring system for supporting Integrated Pest Management in agriculture production
Authors: Nugroho A P , Purba S , Pratomo Y B , Hadi S , Suputa  , Utami S S 
Published: April 2020

Abstract
Integrated Pest Management (IPM) is a conception or way of thinking about Management of Plant Pests with a multidisciplinary ecological approach to managing pest populations by utilizing a variety of compatible control tactics in a coordinating management unit. Acoustic signals produced by insects can be used as a source of information about their presence and behaviour. Problems encountered in observing acoustic signals produced by animals in the context of integrated pest control are supporting equipment factors that can facilitate data acquisition, data management, and species identification based on audio recordings (species identification). The objective of this study is to design microcomputer-based bioacoustics monitoring system that is integrated with the cloud. In more detail, the specific objectives are (1) Designing microcomputer-based bioacoustics monitoring system as a supporter of data acquisition systems with cloud integration features, (2) Testing the performance of a bioacoustics monitoring system for field observations. Bioacoustics monitoring system based on a microcomputer with cloud integration has been developed to support the implementation of integrated pest management. The developed system uses a raspberry pi as a central processing unit in local for data acquisition systems that are connected to the cloud using the Internet connection. As a result of the laboratory-scale test in indoor and outdoor setup, the system could record sample insect sound (Katydid and Cricket) clearly for both conditions, although noise from environment also appears in data analysis affecting the insect identification in future utilization.
Gall rust disease incidence of Falcata (Paraserianthes falcataria (L.) Nielsen) in Falcata – based agroforestry systems in Misamis Oriental, Philippines
Authors: Palma R A , Tiongco L E , Canencia O P , Boniao R D , Florida E J , Dagonio J Y 
Published: April 2020

Abstract
Falcata – based agroforestry systems in eastern part of Misamis Oriental is affected by gall rust disease caused by Uromycladium tepperianum (Sacc,) considered as one of the most destructive disease. The objectives of this study at Misamis Oriental, Northern Mindanao were to (i) determine the status of gall rust disease incidence in selected eastern municipalities and city of Northern Mindanao, and (ii) determine the factors and its relationship with gall rust disease. The sampling intensity was 10% or 1,000 m2 of one hectare at each site. Twenty temporary sample plots per municipalities and city were identified and assessed with a total of 140 plots. Each plot contained 15-70 trees for observation. Gall rust disease incidence per municipalities and city varies ranging from occasional to very common. Across site the incidence is considered common (25->50%). Elevation, spacing and age were associated with reduction or increase in gall rust disease incidence in these parts of Northern Mindanao.
Run off prediction by using small plots at teak forest, dry land and settlement areas in Pitu village, Ngawi, East Java
Authors: Kusumandari A , Pratiwi I , Widiasmoro S 
Published: April 2020

Abstract
Erosion is the process of soil movement from one place to another. The different amount of erosion that occurs in every land-use is caused by the difference of land cover in every land use. The purpose of this study is to find out the amount of erosion, the value of runoff and runoff coefficients, the correlation between rainfall and runoff, also the correlation between runoff and erosion which occurred in three different land use types. This research was conducted in Pitu Village on 3 different land uses, first in the teak forest land-use, second in yard land use, and third in the agriculture field land use. Small plots of 22 m × 4 m were applied to determine the erosion and the value of runoff. SeXI-FS software is used to describe the diagram profile of vegetation condition in each land use. The data were analyzed by using linier regression to determine the correlation between rainfall thickness and runoff, also the correlation between runoff and erosion using Sigma Plot software. The result shows that the largest runoff occured in settlement land (averaged: 95.96 mm) and the smallest runoff in dry land (11.85 mm in average). The largest runoff coefficient occurs in settlement land (averaged: 0.22) and the smallest runoff coefficient in dry land (averaged: 0.025). The runoff coefficient for each type of land use is included in the low category. Rainfall depth has a positive correlation with runoff. The greater the rainfall depth, the greater the runoff produced.
Communities conservation activities to support sustainable land use of upstream Merawu Watershed
Authors: Hobo K B R , Suryatmojo H , Ngadisih  
Published: April 2020

Abstract
Land use in the upstream Merawu watershed is dominant with agroforestry and intensive agriculture. Poor land management and conservation might lead to land degradation and affect the function of land use in the upstream area. This study aims to find out the community conservation activities which support and maintain the function of land use as a recharge area and protect the downstream. We used a qualitative method in the form of interviews at two locations representing dominant land use in the upstream Merawu watershed, agroforestry in Leksana Village, and intensive farming in Penanggungan Village. We analyzed the data descriptively, supported by field observation and literature studies. We found that the form of conservation activities and its triggers in land management were different. Leksana’s community tended to do the agroforestry system, combined with terracing, contour strip cropping, organic mulch, and organic fertilizer as their local wisdom to maintain the land function. Penanggungan community’s conservation activities were based on the crops they grow, mostly potato, that needed to be planted perpendicular to the slope, using plastic mulch and chemical substances. They believe that the agroforestry has a negative impact on their crops while crop rotation and manual plowing using hoe are their remaining conservation activities to maintain the land function. The results prove that Leksana’s community is still considering conservation activities in their land management while Penanggungan’s community is not, due to the crops’ needs and economic factors.
The application of numerical simulation coupled flow and geomechanics in the study of geology-engineering integration
Authors: Ma Junxiu , He Xiaodong , Yu Huiyong , Chen Ang , Yang Shengfeng , Li Yunzhe 
Published: April 2020

Abstract
The low-permeability reservoir is mainly featured by small reservoir pore, tight, fine throat, high filtration resistance, and low oil productivity. After several years of working to recover hydrocarbons from these reservoirs effectively, it has been proven that creating complex fracture networks by multi-stage fracturing is one of the most efficient ways to enhance production. However, several factors affect the development of the complex fracture networks, and the in-situ stress is the most significant one. Low in-situ stress anisotropy [1] increases the possibility of creating complex fracture networks with hydraulic fracturing. In order to compensate for the in-situ stress anisotropy, based on the application of a numerical model coupled flow and geomechanics, this research analyzes the variation of in-situ stress and suggests arranging a sequence of horizontal well deployment. In addition, the research predicts the dynamic productivity coupled flow and geomechanics. From the results, this research concludes the dynamic change regularity of in-situ stress and the impact of difference well deployment, which is beneficial to optimize horizontal well deployment and fracturing design [2].