bluuebunny/crossref_metadata_2025 huggingface dataset:
EAST steady-state long pulse H-mode with core-edge integration for CFETR
Authors: Gong X.Z. , Garofalo A.M. , Huang J. , Qian J.P. , Ekedah A. , Maingi R. , holcomb C.T. , Liu F.K. , Zhao Y.P. , Xiao B.J. , Hu J.S. , Hu C.D. , Hu L.Q. , Wang M. , Xu H.D. , Li E. , Zeng L. , Zang Q. , Liu H.Q. , Lyu B. , Yuan Q.P. , Li K.D. , Zhang B. , Zhang J.Y. , Jia T.Q. , Wu M.Q. , Chen J.L. , Zhu X. , Li M.H. , Zhang X.J. , Zhang L. , Duan Y.M. , Wang L. , Ding R. , Sun Y.W. , Xu G.S. , Liang Y.F. , Xiang N. , Wan B.N. , Li J.G.
Published: January 2022

A recent EAST experiment has successfully demonstrated long pulse steady-state high plasma performance scenario and core-edge integration since the last IAEA in 2018. A discharge with a duration over 60 s with β
P ∼ 2.0, β
N ∼ 1.6, H98y2 ∼ 1.3 and an internal transport barrier on the electron temperature channel is obtained with multi-RF power heating and current drive. A higher β
N (β
N ∼ 1.8, β
p ∼ 2.0, H98y2 ∼ 1.3, n
e/n
GW ∼ 0.75) with a duration of 20 s is achieved by using the modulated neutral beam and multi-RF power, where several normalized parameters are close or even higher than the phase III 1 GW scenario of CFETR steady-state. High-Z impurity accumulation in the plasma core is well controlled in a low level by using the on-axis ECH. Modeling shows that the strong diffusion of TEM turbulence in the central region prevents tungsten impurity from accumulating. More recently, EAST has demonstrated compatible core-edge integration discharges in the high β
p scenario: high confinement H98y2 > 1.2 with high β
P ∼ 2.5/β
N ∼ 2.0 and f
bs ∼ 50% is sustained with reduced divertor heat flux at high density n
e/n
GW ∼ 0.7 and moderate q
95 ∼ 6.7. By combining active impurity seeding through radiative divertor feedback control and strike point splitting induced by resonant perturbation coil, the peak heat flux is reduced by 20–30% on the ITER-like tungsten divertor, here a mixture of 50% neon and 50% D2 is applied.
Effects of Clay in Nylon Fibe
Authors: Uddin Faheem
Published: January 2022

Since the introduction of nylon 6:6, and nylon 6, the nylon fiber was in significant demand in home textile and technical textile articles. Its uses in hosiery, sail cloth, parachute, blouses, gowns and veils, swim suit, parachute, and lingerie etc. Improving the performance of any nylon matrix with the loading of clay content, for the desired effects, can be an important subject to expand the utilization of nylon in automotive, technical textiles etc. This review study is to find out how clay may contribute in the performance of nylon fiber, and what research directions are appealing in achieving the desired effects in nylon fibers. The known effects on orientation and crystal structure of any nylon polymer; and how the advantageous effects in the utilization of nylon are achievable through the incorporation of clay mineral particularly in composite fiber. Strength, fatigue and thermal stability are some improved effects possible. Heat resistance and flame retardancy are particularly discussed. The aim of this review study is to realize how the nylon fiber was modified using the montmorillonite clay; and to explore what are the possible effects, and improvement achieved.
Fabrication and Evaluation of Bimetallic Materials for Removal of Cr6+
Authors: Wang Tingting , Han Zhiyong , Lv Xiaobin
Published: January 2022

Adsorption technology is an effective way for removal of heavy metals ions and other organic pollutants in water treatment. In recent years, bimetallic adsorbents with high performance and low cost have attracted more and more attention. In this study, nano zero valent iron was prepared. On this basis, Fe/Cu Bimetallic materials were prepared. The effects of Cu conversion, initial concentration, time, and pH value on Cr6+ removal rate and amount were systematically tested. The results show that under the conditions of initial concentration (50mg/L), time (60min) and pH (3), the Fe/Cu material with copper conversion of 3% has the best effect on the removal of Cr6+ in wastewater. Thus, this study is expected to provide important reference data for the effective removal of Cr6+ in water.
Effect of Square Texture on Tribological Properties of Nano-SiO2/POB-PTFE Composites
Authors: Yang Dongya , Xue Wei , Xiong Xinwen , Li Weitao , Sun Rongtuo , Li Jiajun
Published: January 2022

In order to study the seal design problem of piston rings in Stirling engine, on the basis of filling PTFE with Nano-SiO2 and POB and preparing the GCr15 contact surface with square texture by HM20-I laser marking machine, experiments were carried out on LSR-2M wear tester by indirect weighing and in-situ observation methods. Optical microscope (OM) and scanning electron microscope (SEM) were used to observe the evolution of Nano-SiO2/POB-PTFE composites’ transfer film on contact surface. The results showed that the square texture would shorten the running-in and transitionary periods of the composites’ tribological process, accelerate into the stationary period. The formation process of the composites’ transfer film on the square textured contact surface was also different from smooth contact surface. Although the square texture would increase wear rate, its ability to store wear debris is more conducive to the formation of reliable, uniform and continuous transfer film with a same friction direction. Obviously, reasonable design of surface texture can effectively improve the wear resistance of sealing parts made of filling modified PTFE composites, thus providing theoretical guidance for the seal design of Stirling engine piston ring.
Analysis of the Operation Principle of Typical Cogeneration Units
Authors: Ji Haofan
Published: January 2022

Cogeneration is a comprehensive energy utilization technology. While generating electricity, it effectively uses vaporized latent heat for heating, which has many advantages such as high energy utilization efficiency and environmental protection. The technical characteristics of several different forms of cogeneration such as gas turbines, gas-steams and fuel cells are analyzed. It can be seen from this paper that the heating method in the cogeneration area is advanced and reasonable, which has a good reference significance for improving energy utilization, energy conservation and emission reduction.
Stability Analysis for Equivalent Circular Cylindrical Shell
Authors: Chen Yuying , Li Jing , Zhang Wei , He Bin
Published: January 2022

Ring truss antenna is an ideal structure for large satellite antenna, which can be equivalent to circular cylindrical shell model. Based on the high-dimensional nonlinear dynamic vibration and bifurcation theory, we focus on the nonlinear dynamic behavior for breathing vibration system of ring truss antenna with internal resonance. The nonlinear transformation and Routh-Hurwitz criterion are used to analyze the stability of equilibrium point after disturbance, and the theoretical analysis is verified by numerical simulation. It provides a reference to ensure the stability and control parameters of satellite antenna in complex space environment.
Energy Consumption Analysis Model of Typical Cogeneration Systems
Authors: Ji Haofan
Published: January 2022

At present, China’s urban heating system consumes a lot of energy and is seriously polluted. Our government is working hard to develop urban natural gas regional heating systems to replace traditional coal-fired heating to reduce the serious impact of coal combustion emissions on the urban atmospheric environment during the heating season. On this basis, the characteristics of traditional energy efficiency comparison methods and the problems encountered by these traditional methods in the energy efficiency analysis and application of distributed energy cold, hot and power multigeneration systems in China are analyzed, and the comparable performance efficiency analysis methods suitable for the application of cold, hot and hot power multiple production applications of distributed energy are studied.
Research on New Cleaning Method of Automobile Air Conditioner
Authors: Tang Xiaotao , Huang He
Published: January 2022

on the car air conditioning cleaning market at present there are some problem of cleaning method has been widely criticized, simple and convenient cleaning method, in particular, the so-called clean air conditioning is “only spray cleaner, no water washing”, this will cause the pipeline internal dirt clean is not complete, easy to internal damage other parts of automobile air conditioning, affect the normal operation of the air conditioning, the remaining part of the chemical substances will also produce secondary pollution to the air inside the car, seriously affects people’s health and safety.
Study of Real-road Nitrogen Oxide Emissions of Non-road Vehicles
Authors: Tan Piqiang , Yao Junwen , Yao Chaojie , Hu Zhiyuan , Lou Diming , Lu Shuyu , Li Dengxin
Published: January 2022

The exhaust gas pollutants of the non-road vehicles are harmful to the environment. Many non-road vehicles meet the requirements of the regulations in the laboratory. However, the real-road emissions of such vehicles are sometimes higher. Measuring the real-road emissions of non-road vehicles is very important. The real-road emissions are measured by on-Board Diagnostics (OBD), but there are some problems in the data stability of OBD. The NOx emissions of a bulldozer (a type of China IV non-road vehicle) based on both portable emission measurement system (PEMS) and OBD are studied in this article. Experiments contained three working processes: idle, driving, and operating. The nitrogen oxide (NOx) emissions during operating were highest. The NOx emission characteristics of the bulldozer from PEMS and OBD have the similar variation trends. But there are still some differences, including the NOx emission value and response time. The measurement principles and different sampling points between PEMS and OBD are the main factors. An effective data processing method is introduced to reduce the differences of between the data from PEMS and OBD. Briefly, the NOx emissions of the OBD and PEMS were highly consistent. The OBD is reliable and can be widely used in non-road vehicles.
Review of Research on System Thermal Inertia Modelling and Optimal Scheduling from the Perspective of Flexible Resources
Authors: Cong Lin , Zhou Xichao , Li Na , Zhu Haifeng , Fan Ying , Bu Lingxi
Published: January 2022

The thermal inertia of the existing heating system is often considered an adverse factor, which will affect the operation of the system. However, under the perspective of resource flexibility, the thermal inertia of the system can effectively increase the flexibility of the system operation, significantly reduce the energy consumption and enhance the ability of energy supply and demand balance, and enhance the new energy integration, such as the wind power. Based on the flexible resources, it focuses on the study of the thermal inertia of the “network side” heating pipe network of the system and the optimal scheduling of the heating system. Combined with the thermal inertia of the pipe network, the operation characteristics of the power/heat output of the gas-steam combined cycle unit were analysed theoretically. On this basis, the optimal scheduling model of the system was established. Taking the energy supply system of an industrial park as an example, the model was verified to achieve a more stable power output effect of the unit.
Bifurcation Analysis of a Four-Dimensional System of Two Symmetric Coupled Nonlinear Oscillators with Clearance
Authors: Guo Ziyu , Li Jing , Zhu Shaotao , Geng Hui
Published: January 2022

The research gradually highlights vibration and dynamical analysis of symmetric coupled nonlinear oscillators model with clearance. The aim of this paper is the bifurcation analysis of the symmetric coupled nonlinear oscillators modeled by a four-dimensional nonsmooth system. The approximate solution of this system is obtained with aid of averaging method and Krylov-Bogoliubov (KB) transformation presented by new notations of matrices. The bifurcation function is derived to investigate its dynamic behaviour by singularity theory. The results obtained provide guidance for the nonlinear vibration of symmetric coupled nonlinear oscillators model with clearance.
Research on Tension Control System of Reciprocating Winding
Authors: Zhao Kaijie , Zeng Sheng , Zhao Liangliang
Published: January 2022

When the enameled wire is winded onto the poles of the motor stator or rotor, the winding quality hugely relies on the control precision of the tension. Therefore, it is necessary to control the tension of the enameled wire in winding process. A tension control system is built with single chip microcomputer, the encoder and the servo motor. The PID feedback controller and feedforward controller are combined to form feedforward feedback controller, which using feedback information of swing angle deviation and feedforward information of wire frame position to adjust the pay off speed dynamically and control tension of enameled wire further. A procedural experimental modelling method is discussed in order to identify the feedforward model. The experiment is performed, it is found that in the typical situation of setting tension 1500 g, the tension fluctuation rate of the PID controller with feedforward model is only 2%, which is far better than that of pure PID controller with a fluctuation rate of 14%. The result shows that the proposed experimental modelling method hosts the characteristics of good accuracy, universality and applicability.
Operation Mode of Integrated Energy System with Liquid Air Energy Storage
Authors: Bai Ning , Liu Yixue , Jiang Xiaoxia , Cui Shuangshuang , Li Haipeng , He Qing
Published: January 2022

This paper takes the energy supply in the park as the research background, the integrated energy system as the research object and establishes the integrated energy system model including liquid air energy storage, distributed photovoltaic, gas turbines and other equipment. When the integrated energy system operates the mode of “ordering heat by power”, the heat wasted as high as 14.647MWh and the cold wasted as high as 24.13MWh. When the system is not equipped with LAES, the output power of the CCHP unit increases by 21MWh, the electricity purchase in power grid increases by 8.123MWh, the heat waste increases by 21.696MWh and the cold waste increases by 12.421MWh. When the integrated energy system operates the mode of [[CHECK_DOUBLEQUOT_ENT]] ordering power by heat ", heat energy of the system has been reasonably utilized. When the system is not equipped with LAES, the power output and heat of the CCHP unit in the system are the same, the thermal energy output results of the system are the same and the electricity purchased by the power grid increases by 32.14MWh.
Energy evaluation of clay firing process and combustion gases in an intermittent kiln
Authors: Guerrero Gómez G , Afanador Garcia N , Nolasco Serna C
Published: January 2022

The recording of temperatures in different positions in the firing process in an intermittent kiln to produce ceramic materials is presented, which led to the energy evaluation, determining the heat used for the clay firing process and the heat losses. In addition, a study of the emissions of pollutant gases released into the environment was carried out, as stipulated in the protocol of control, and monitoring of stationary source. In the energy balance, large energy losses were detected in heat accumulation in the masonry of 7.20×106 KJ of the energy supplied, representing 16.99%, and in the kiln walls of 5.20×10 KJ, representing 12.17%. As a result, it is necessary to make constructive and operative changes in the operation of the kilns, which will lead to the recovery of residual heat in the use of drying of parts, drying, and preheating of combustion air, reducing energy consumption and emissions of pollutants into the atmosphere. The average concentration of particulate matter released into the environment was 1056.60 mg/m3, 422% higher than the standard, affecting people’s health.
Thermo-economic analysis of the potential for electricity generation by integrating a Rankine cycle with municipal solid waste incineration
Authors: Sánchez Ascanio L , Torres Correa K A , Quintero-Coronel D A
Published: January 2022

Municipal Solid Wastes generated by human activities increase as the population grows; in Ocaña city, Norte de Santander, Colombia, these wastes reach a monthly production of about 2660 tons, made up of 65.6% waste food, 15.3% plastics, 9.9% toilet paper, 3.6% paperboard, 2.6% textile residues, 1.6% paper, 0.8% wood wastes, and 0.1% rubber. This work estimates the energy potential from municipal solid wastes for electricity generation and their production costs. A multicriteria decision analysis allowed selecting the best technology for the wastes processing based on their energy content. For the evaluated criteria, the incineration process showed priority. A model developed in the engineering equation solver software allowed calculating the electrical energy potential by integrating the incineration process with a Rankine cycle. By implementing a thermo-economic assessment, the electricity generation costs were determined, where the inversion, installation, operation, and maintenance costs were considered. 1974 KW of electrical power with generation costs of $300/KWh and a payback period of 2.5 years show the feasibility of this process.
Inference of molecular divertor density from filtered camera analysis of molecularly induced Balmer line emission during detachment in JET L-mode plasmas
Authors: Karhunen J. , Holm A. , Lomanowski B. , Solokha V. , Aleiferis S. , Carvalho P. , Groth M. , Lawson K.D. , Meigs A.G. , Shaw A.
Published: January 2022

A previously presented Monte Carlo method for estimating local plasma conditions in 2D based on intensity ratios of deuterium Balmer D
α
, D
γ
and D
ɛ
lines was amended to consider also the D
α
and D
γ
emission contributions arising from molecular processes. The obtained estimates were used to infer the molecular divertor density with the help of the molecular databases of EIRENE. The method was benchmarked against EDGE2D-EIRENE simulations and observed to reproduce the molecularly induced emission fractions and the molecular divertor densities primarily within 25% of the references. Experimental analysis of a JET L-mode density scan suggested molecularly induced D
α
and D
γ
contributions of up to 60–70% and 20%, respectively, during the process of detachment. The independent estimates of the molecular divertor density inferred from the obtained molecularly induced D
α
and D
γ
intensities agree within uncertainties with each other. Both estimates show the molecular density increasing up to approximately 1.0–2.0 × 1020 m−3 at the outer strike point in deep detachment with its ratio to the local electron density agreeing with EDGE2D-EIRENE predictions within the scatter of the experimental data.
Monte Carlo simulations for XIDer, a novel digital integration X-ray detector for the next generation of synchrotron radiation sources
Authors: Collonge M. , Busca P. , Fajardo P. , Williams M.
Published: January 2022

This work presents the first simulation results of the incremental digital integration readout, a charge-integrating front-end scheme with in-pixel digitisation and accumulation. This novel readout concept is at the core of the XIDer (X-ray Integrating Detector) project, which aims to design 2D pixelated X-ray detectors optimised for high energy scattering and diffraction applications for the next generation of synchrotron radiation sources such as the ESRF Extremely Brilliant Source (EBS). The digital integration readout and the XIDer detector open the possibilities for high-duty-cycle operation under very high photon flux, fast frame-rate and high dynamic range with single-photon sensitivity in the 30–100 keV energy range. The readout method allows for noise-free effective X-ray detection. The digital integration concept is currently under investigation to evaluate the impact of main critical design parameters to identify the strengths and weaknesses of the readout scheme and consequently to propose refinements in the final implementation. Simulations have been performed with a dedicated Monte Carlo simulation tool, X-DECIMO, a modular Python package designed to recreate the complete detection chain of X-ray detectors for synchrotron radiation experiments. Losses and non-linearities of the readout scheme are simulated and quantified. In addition to presenting simulation results for this novel readout scheme, this work underlines the potential of the approach and some of its limitations.
Distribution of organic carbon in Ultisol soils with citronella and pine vegetation, at Gayo Highlands, Aceh
Authors: Karim A , Hifnalisa  , Jufri Y , Fazlina Y D , Megawati
Published: January 2022

Soil organic matter is an indicator of soil fertility. The purpose of this study was to analyse various forms of soil organic carbon in citronella plantation, citronella plantation under pine tree, and soil under pine tree. Soil organic carbon in various forms was analysed from soil samples taken from each horizon and soil profile. The soil profiles observed were ultisol profiles planted with citronella, citronella under pine tree, and under pine tree, and slopes; 0-8%, 8-15%, 15 -25%, and 25-40%, in order to obtain 12 soil profiles with a total of 39 soil samples. Ultisols planted with citronella had higher soil organic carbon than ultisols planted with citronella under pine tree and ultisols under pine trees. Based on the slope, the highest soil organic carbon was obtained in the soil with a slope of 0-8%, and decreased with increasing slope. Based on soil depth, the highest soil organic carbon was obtained in the upper horizon, compared to the horizon below. The highest total soil organic carbon was obtained at the soil surface horizon with a slope of 0-8% and citronella was planted. This pattern of total soil organic carbon is similar to that of sesquioxide bound organic carbon, but is not consistent with that of free clay bound organic carbon.
Monitoring of damage and distribution of invasive fall armyworm, Spodoptera frugiperda (J.E. Smith) (Lepidoptera: Noctuidae) on maize crop in Karo, North Sumatera, Indonesia
Authors: Supartha I W , Susila I W , Yuliadhi K A , Haloho E S M , Yudha I K W , Utama I W E K , Wiradana P A
Published: January 2022

The fall armyworm (FAW), Spodoptera frugiperda (J.E. Smith) (Lepidoptera: Noctuidae) is an invasive pest from America and has recently become an important pest in Indonesia. In their new environment, these pests have very high migratory and adaptive skills, as well as aggressive feeding habits. The aim of this research was to monitor the distribution, percentage of attacks, and damage caused by S. frugiperda on maize fields in the Karo District of North Sumatra Province. The study was conducted using a survey method at various altitudes and the sample unit was determined using the diagonal method. Each sample unit has a size of 2 × 2 m2. The age of maize crop used as the sample is 2-4; 5-6; 7-8; 9-10; and 11 weeks after planting (wap). Symptoms of attack, number of larvae population, and percentage of FAW attack were observed directly on plants. The results showed that FAW spread evenly at various altitudes, with the highest population at an altitude of 500-1,000 m.a.s.l at the age of 2-4 wap with a larval population density of 14.20 individual/unit sample. The highest percentage of attack was found at an altitude of 500-1,000 m.a.s.l, namely 82% at 2-4 wap. The highest attack on leaves occurred at an altitude of 500-1,000 m.a.s.l (70.6%) at the age of 2-4 wap.
Smallholder planning for Bali cattle fattening in Barru Regency, South Sulawesi, Indonesia
Authors: Indrawirawan  , Suwignyo B , Kusumastuti T A
Published: January 2022

This study aims to analyse enterprise budgeting and the factors that affect the smallholder Bali cattle fattening income in Barru Regency, South Sulawesi, Indonesia. The total respondents were 46 farmers include 11 farmers at Bali cattle fattening enterprise six-month period and 35 farmers at fattening enterprise nine-month period. Respondents were selected using a purposive method. The data of the research was collected using interviews with questionnaires. Analysis of economic potential as follows net income and return to labour and management used enterprise budgeting analysis. The factors that affect the income of farmers using multiple linear regression analysis. The results showed that the 6- and 9-month fattening period of the smallholder Bali cattle fattening have net income of IDR 23,122,086 / farmer/period and IDR 11,926,657/farmer/period. In addition, it provides returns to labour and management of IDR 27,428,173/farmer/period and IDR 15,111,982/farmer/period. The number of feeder cattle and non-formal education dummy partially and significantly influence (P<0.01) income smallholders. Smallholder Bali cattle fattening enterprise is a potential business alternative to generate income for rural communities.
Effect of pendimethalin and sulfentrazone on characteristics of weeds in soybean cultivation
Authors: Hasanuddin Hasanuddin , Hafsah S , Halimursyadah  , Nurhayati  , Setiawan A , Aryani D S
Published: January 2022

Tank-mixing herbicides can increase the efficiency of weed control on soybean cultivation. The purpose of this study was to acquire the proper dose of pendimethalin and sulfentrazone both alone and in mixture to control weeds on soybean farming. It was conducted from July to September 2019 at Experimental Farm, Faculty of Agriculture, Universitas Syiah Kuala, employing non-Factorial Randomized Completely Block Design (RCBD) comprising different doses of herbicides: control, pendimethalin 1500 g a.i/ha, sulfentrazone 1500 g a.i/ha, pendimethalin 750 g a.i/ha + sulfentrazone 750 g a.i/ha, pendimethalin 1000 g a.i/ha + sulfentrazone 1000 g a.i/ha, pendimethalin 500 g a.i/ha + sulfentrazone 1000 g a.i/ha, pendimethalin 1000 g a.i/ha + sulfentrazone 500 g a.i/ha and pendimethalin 500 g a.i/ha + sulfentrazone 500 g a.i/ha. The variables observed were weed control percentage, weed species, number of weeds, and weed dry weight. The results showed that the application of pendimethalin 500 g a.i/ha together with sulfentrazone 500 g a.i/ha has increased weed control percentage and decrease weed species, number of weeds and weed dry weight.
Exploration of Aceh traditional food: Chemical quality characterization of asam sunti in Banda Aceh
Authors: Nilda C , Muzaifa M , Hasbi I Y , Hasni D , Rahmi F
Published: January 2022

As a result of its diverse culture and nature, Indonesia is rich in traditional cuisine. In Aceh province, located in the western part of Indonesia, there is a special condiment known as asam sunti, made of fermented bilimbi (Averrhoa bilimbi L.). Asam sunti is used as a spice to give a sour taste and specific aroma in Acehnese cuisine. Although asam sunti is widely used by the people in Aceh, but until now there is no standard quality that shows the quality of asam sunti. The quality of a sam sunti products that existing on the market is very diverse, especially in colour and texture. This study aims to analyse the chemical quality of asam sunti obtained from several markets in the city of Banda Aceh. Samples were obtained from 5 markets, namely Gampong Baroe, Peunayong, Seutui, Ulee Kareng and Gampong Peuniti Market. Chemical parameters analysed were moisture content, ash content, salt content and titrated acid content. The result shows that asam sunti in Banda Aceh city market has diverse chemical characteristic with moisture content range 21.38%-33.8% with average 29.48%, ash content 0.13%-0.45% with average 0.27%, salt content 6.11%-18.34% with average 8.15% and titrated acid content 7.5%-14.5% with average 11%. This chemical data needs to be correlated in further research with the level of consumer preference through descriptive and hedonic sensory tests so that later a complete asam sunti quality character can be obtained and can be made into a standard that is practically and scientifically acceptable.
Growth and yields of two varieties of maize (Zea mays L.) intercropped with peanut (Arachys hypogaea L.) applied by bokashi plus fertilizer between the rows of teak trees based agroforestry system
Authors: Karimuna L , Halim  , Ansi A , Marfi W E , Wijayanto T , Hasanuddin L
Published: January 2022

Nutrient shortages are the main problems faced by farmers, so as to improve soil fertility using organic fertilizer is compulsory. The main objective was to analyze the effects of bokashi plus fertilizer on the growth and yields of two varieties of maize intercropped with peanut under three years old teak trees in agroforestry system. The research was arranged in randomized completely block design in factorial pattern with two factors, maize variety: local maize and hybrid corn bisi-2; and bokashi plus fertilizer doses: 0, 3, 6 and 9 t ha-1. Maize growth recorded were plant height, leaf number, stem diameter and leaf area at 2, 4, 6 and 8 WAP and maize yields recorded were cob weight with cornhusk, cob weight without cornhusk, cob length, diameter, row number, 100 seeds dry weight, biomass dry weight, yield and LER. The results showed that interaction between maize variety and bokashi plus fertilizer had significant effect on the growth and yield of maize intercropped with peanut under three years of teak trees in agroforestry system. The best effects of maize growth and yield were obtained at 9 t ha-1 with highest yield of local maize and hybrid maize of 4,69 and 5,79 t ha-1.
Nutrient consumption and digestibility in Garut sheep fed with elephant grass and pollard bran
Authors: Ningrum T W , Hanim C , Yusiati L M , Kustantinah  , Widyobroto B P
Published: January 2022

This study aimed to compare the nutrients consumption and digestibility between Garut rams and ewes fed with forage (elephant grass) and concentrate (pollard bran) with a ratio of 60:40 (based on the dry matter). The livestock used were 6 Garut rams and 6 Garut ewes. They were placed in metabolic cages and equipped with feces containers. This research was conducted 14 days for the adaptation period and 5 days for the collection period. During the collection period, feed, feed residue, and feces collection were carried out for analysis. The analysis consisted of dry matter (DM), organic matter (OM), crude protein (CP), ether extract (EE), crude fiber (CF), nitrogen-free extract (NFE), and total digestible nutrients (TDN). The data obtained were used to calculate nutrient consumption and digestibility. Based on the research, it was known that average consumption and digestibility of dry matter (DM), organic matter (OM), crude protein (CP), crude lipid (CL), crude fiber (CF), nitrogen-free extract (NFE), and total digestible nutrients (TDN) of Garut rams and ewes were not significantly different (P>0.05). All nutrients consumed by rams were higher than ewes, but the nutrients digestibility value in rams was lower than ewes.
Yield components of the M7 Kipas Putih mutant soybean
Authors: Zuyasna  , Hayati E , Ghufrani Y , Marliah A , Basyah B , Nura
Published: January 2022

This study aimed to obtain the homogeny of M8 soybean lines in an effort to release new high yielding varieties. The research was conducted in Lamsidaya village, and the observation of yield components was carried out at the Plant Breeding Laboratory, Faculty of Agriculture, Universitas Syiah Kuala. This study did not use an experimental design, so that the quantitative characters were observed individually from each plant, then analyzed by estimating the heritability broad sense value and the progress of selection. The material used were var. Kipas Putih and var. Dega1 as control, eight of 7th generation Kipas Putih mutant lines (B4, B7, B10, B12, B13, B15, B18 and B22). All genotypes were planted in rectangular plot 10 m x 1 m, drainage 50 cm, and planting distance 50 cm x 30 cm. Plants were maintained in accordance with the recommendation for soybean cultivation from Balitkabi, and fertilizer NPK (16:16:16) was given 200 g/plot (200 kgha-1). Parameters observed included plant height, flowering time, harvest time, number of productive branches, total number of pods per plant, number of filled pods per plant, percentage of filled pods per plant, seed weight per plant, weight of 100 seeds, seed weight per plot, and yield potential. All quantitative characters indicated increase on selection except for the character of plant height, percentage of filled pods and weight of 100 seeds because the heritability value was low. The B18 line has the potential to become a new high yielding variety because it has a high yield potential (3.02 tons ha-1) with a large seed size compared to the other seven mutant lines and is also higher than the parent Kipas Putih and var Dega 1 varieties.
Fig trees (Ficus spp.) and their pollinating wasps in Universitas Syiah Kuala Campus, Banda Aceh, Indonesia
Authors: Jauharlina J , Anhar A , Minarti M
Published: January 2022

Fig trees (Ficus spp.) and their pollinating wasps (Hymenoptera; Agaonindae) are a unique system to study mutualism. Female fig wasps deposit eggs and develop their progeny in galled female flowers inside the figs, while fig wasps pollinate females flower inside the same figs. A study investigating fig tree species composition and pollinating wasps was conducted at Universitas Syiah Kuala campus, Banda Aceh. We recorded all fig tree species found in the area from Dec 2020 until June 2021. Ten semi-ripe fig fruits on each fig tree were sampled and brought to the laboratory to examine the wasps inside. We recorded 112 individuals fig trees that belonged to 11 species; most of them were monoecious species. The most abundant species was Ficus altissima, followed by F. Benjamina, and F. macrocarpa, while the least was F.racemosa and F. carica. A number of 20.7± 6.5 (Mean ± SE) female pollinator Eupristina koningsbergeri was counted in a single fig of F. benjamina compared to 350.4±45.4 (Mean ± SE) Ceratosolen fusciceps female wasps in fig of F.racemosa. This study has provided an example of obligate mutualism between different species in the local area, which has been observed since a long time ago.
Improving of true shallot seeds germination by the application of plant growth regulators and osmoconditioning treatment
Authors: Tanjung K A , Siregar L A M , Damanik R I M
Published: January 2022

This study aims to determine the effect of the application of plant growth regulators and osmoconditioning treatment to improve the germination of true shallot seeds. This research was conducted in Asam Kumbang, Medan Selayang, Medan, Indonesia. The research method was a Randomize Block Design with 2 factors, the first factor is Plant Growth Regulators (Z) with 6 levels, namely Z0 (Without PGRs Application), Z1 (Gibberellin 500 ppm), Z2 (Putrescine 15 ppm), Z3 (Putrescine 20 ppm), Z4 (Putrescine 15 ppm + Gibberellin 500 ppm), Z5 (Putrescine 20 ppm + Gibberellin 500 ppm). The second factor was the osmoconditioning treatment with Polyethylene Glycol (PEG) 6000 (O) with 4 levels, namely O0 (Without Osmoconditioning Treatment), O1 (PEG 6000 3%), O2 (PEG 6000 4%), O3 (PEG 6000 5%). Parameters observed were germination rate, germination rate index, percentage of germination, germination ability, simultaneous growth of seeds, seedling length, root length, seedling dry weight, and catalase activity test. The results of this study were: application of plant growth regulators could improve true shallot seed germination, indicated by the observed values of all parameters which were significantly different from those of the control (without PGRs application). The plant growth regulator that produced the best increase in germination was Gibberellins 500 ppm, although the difference in effect with other PGRs was not significantly different. Meanwhile, the osmoconditioning treatment with PEG 6000 was also able to improve the germination of true shallot seeds as indicated by an increase in most of the observed parameters, but in the root length parameter it was seen that the tendency of PEG 6000 3% always gave the highest value but gave the lowest value for this parameter. The best concentration of PEG 6000 in the osmoconditioning treatment to improve true shallot seed germination was 3%.
Callus induction of mountain papaya endosperm (Vasconcellea pubescens A. DC) with different combination of 2,4-Dichlorophenoxyacetic acid and Kinetin
Authors: Zuhro R K , Dewanto H A , Suyadi A , Pribadi T , Hadjoeningtijas O D , Santosa A P
Published: January 2022

Endosperm as a result of double fertilization in Angiospermae shows high level chromosomes and polyploidy. It is also considered as dead tissue that unable to be generated to form plantlet. The aim of this research is to determine the effect of kinetin and 2,4-Dichlorophenoxyacetic acid (2,4-D) in induction of callus formation of mountain papaya. This research used A factorial randomized block design with 18 groups, 1 fruit was used for 1 experimental group. Culture using Murashige and Skog (MS) media with combination of three level of kinetin (0, 2, 4 mgL-1) and six level of 2,4-D (0, 1, 2, 3, 4, 5 mgL-1). Maximum endosperm callus induction (0.88%) was achieved from endosperm explant cultured on MS medium fortified with 2.0 mgL-1 Kinetin and 4.0 mgL-1 2,4-D. The fastest day induction (24,66 day) was observed with 5.0 mg L-1 2,4-D. The maximum number of browning (0,10) was induced by 2.0 mgL-1 Kinetin and 5.0 mgL-1 2,4-D. Combination Kinetin and 2,4-D proved could induces callus formation from mountain papaya endosperm.
Characteristics of avocado (Persea americana) and kluwih (Artocarpus camansi) seeds starch with different extraction methods
Authors: Indarti E , Nurlaila  , Muzaifa M , Noviasari S , Rozali Z F , Yusup E M
Published: January 2022

Seed from avocado (Persea Americana) and kluwih (Artocarpus camansi) fruit are waste and by product from processing fruit. Due to the high starch content from both seeds, there are many extractions process have been applied. The immersed raw material in sodium metabisulfite solution affected to starch properties. The purpose of this study is to characterize of starch extracted with and without immersed in sodium metabisulfite solution. The results showed that the starch yield by immersed in alkaline solution was 21.6% for avocado seed starch and 24.4% for kluwih seed starch, while yield without immersed in sodium metabisulfite solution was 17.5% and 18,2% for avocado seed starch and kluwih seed starch, respectively. The starch content with sodium metabisulfite immersion process of avocado seed and kuwih seed were 79.26% and 72.62%, respectively. Meanwhile without the immersion process resulted starch of 75.13 and 67.30%, in avocado seed starch and kluwih seed starch, respectively. Furthermore, XRD and FTIR analysis were also carried out on starch to see the crystallinity character and functional groups contained in the extracted starch.
Cellulase enzyme activity of the bacteria isolated from mangrove ecosystem in Aceh Besar and Banda Aceh
Authors: Dewiyanti I , Darmawi D , Muchlisin Z A , Helmi T Z , Arisa I I , Rahmiati R , Destri E
Published: January 2022

Cellulolytic bacteria is one of the beneficial bacteria that can found in mangrove ecosystem. The purposes of study were to analyse the cellulolytic index, and to analyse the cellulase activity of bacteria isolated from soil mangrove. Qualitatively, assessment of cellulase activity were carried out at the Microbiology laboratory of Fish Quarantine Station, Quality Control and Safety of Fishery Products (SKIPM) Aceh, while quantitatively was observed in microbiology laboratory, Biology Department, IPB. Assessment of qualitative cellulase activity is performed by growing the selected pure isolate on 1% CMC medium then spilled 1% congo red to test its cellulolytic potential. Cellulolytic potential was determined by clear zone performed around the colony after congo red flooded. The quantitative cellulase enzyme activity test carried out by DNS method tested on one selective isolate. There were 21 from 39 isolates showed a clear zone isolated from mangrove soil. The cellulolytic index (CI) obtained ranged from 0.07 to 0.80 classified as low cellulolytic index criteria. The cellulolytic index was higher in bacteria isolated from mangrove rehabilitated than mangrove unrehabilitated. The highest cellulase activity and specific cellulase activity of BTMD32 was at 48 hours with the value were 0.0012 U/ml, 0.077 U/mg, respectively. The result concluded that the bacteria cellulolytic isolated from mangrove soil had low cellulolytic index, low cellulase activity, and low specific cellulase activity.
Detection of Cracks in Clay Soil Using Quasi-3D Electrical Resistivity Tomography Method: Numerical and Experimental Study
Authors: Hassan Asem A
Published: January 2022

Soil cracks affect the geotechnical characteristics of clay soils frequently used in engineered earth structures. In this work, numerical simulation and laboratory tests using Wenner- Schlumberger array of Electrical Resistivity Tomography (ERT) method are adopted to detect soil cracks in compacted clay soil. 3D numerical simulation showed that air-filled cracks have an anomalous high resistivity signature that can be differentiated from the background due to the high resistivity contrast between cracks and the surrounding soil. Depth, geometry, and extension of the simulated cracks are reasonably indicated. At the laboratory scale, quasi-3D ERT experiment was conducted. The results showed that soil resistivity is significantly affected by an artificially introduced crack as the crack forms a barrier that disturbs the flow of electricity in the soil. Similarly, depth, geometry, and extension of the crack are detected. Both numerical and experimental findings demonstrated that ERT method can effectively be used to identify cracking in clay soils. It is suggested that ERT, as a non invasive method, can be adopted with other traditional geotechnical methods for detecting cracks in clay soils.
Seismic Behaviour of Rc Building Located in Erbil, Iraq and Strengthening by Using Steel Frame Sections Precast Bolt-Connected Steel-Plate Reinforced Concrete
Authors: Sadeq S F , Muhammad B R , Al-Zuheriy A J
Published: January 2022

This paper present outside strengthening with precast substructures, is a relatively new retrofitting approach that has recently attracted the attention of researchers. Outside strengthening with precast substructure, in contrast to member-level strengthening technologies (e.g., FRP strengthening, enlarging member section areas, and replacing rebars), is a structure-system reinforcement method that integrates the substructure and the original structure, improves overall seismic performance, and changes the deformation mode of the entire structure. The seismic capability of the exterior strengthening with precast bolt-connected steel-plate reinforced concrete is critically evaluated in this paper (PBSPC) Case studies are used to demonstrate the working principles, numerical methodologies, and design approaches. The simulation results were similar with prior studies, demonstrating that the numerical model was effective. The use of building steel representations reduces construction time, increases efficiency, and lowers costs. The goal of this technology is to lower the seismic displacement demand of nonductile. Current RC structures have steel frames connecting to the building floors. These frameworks run parallel to the structure of the building. Ganjan Life City, a building in Erbil, Iraq, is being used as a case study. The ISC 2017 and ASCE 7-10 earthquake codes were used to evaluate the building’s seismic performance before and after the reinforcement. The analysis’ findings suggest that the recommended technique is correct.
Evaluation of Static Pile Load Test Results of Ultimate Bearing Capacity by Interpreting Methods
Authors: Adel Raghad , Shakir Ressol R.
Published: January 2022

in geotechnical engineering, foundation piles are ideal for deep foundations that cannot bear higher loads. This architectural expansion places a great deal of responsibility on the engineer to anticipate the appropriate load for the constructor. Unfortunately, calculations of the pile’s bearing capacity are not accessible. It has always been a source of concern for geotechnical engineers, as the structure’s safety depends on the pile’s bearing capacity and gives it a safe value. These research tests are previously known pile load test data from several locations in Nasiriyah to determine the ultimate load-carrying capacity using various interpreting methodologies. A database that was used to test the pile load for three different areas in Nasiriyah, southern Iraq: The Main Drain River Bridge Project, the Al-Eskan Interchange Project, and the Al-Hawra Hospital, as determined by analytical methods, as well as evaluating the final loading values resulting from the methods used, by ASTM D-1143, American and British Standard Code of Practice BS 800. The final capacity for the pile bearing is estimated using these approaches, which are depicted in the form of a graph-based on field data. Chin-Kondner and Brinch Hansen algorithms anticipate the highest failure load for all piles based on the comparison. On average, Chin–Kondner’s ultimate load is 22% higher than Hansen’s maximum load for the 22 pile load tests. Decourt and DeBeer, and Mazurkiewicz’s techniques yielded the closest average failure load. Buttler-Hoy approach yielded the smallest failure load.
The Employment of Endophytic Bacteria for Phytodegradation of Pyridine
Authors: Kh Karaghool Haneen A
Published: January 2022

Pyridine is considered a heterocyclic aromatic chemical that is poisonous and carcinogenic to a variety of living species. The use of plant and endophytic- bacteria to improve the efficiency of pollutants extraction is considered a viable technique since the endophytic bacteria help in the adaptation of the plant itself in various ecosystems and have significant ecological importance because they improve the soil fertility and quality. This research aims to stimulate the pyridine phytodegradation by Phragmites australis plants using the endophytic bacterial strain, Acinetobacter by inoculation these bacterial cells to the plants to see if it might increase plant growth and pyridine phytodegradation. In the present study, the system of pyridine phytodegradation basins with the vertical subsurface flow (VSSF) was adopted, since this system has better ventilation. In addition, the retention time is several hours due to the penetration of water molecules to the layers of packing materials of the basin, which have a relatively high hydraulic conductivity. After conducting the experiments, samples were collected and tests were done to find out the optimum conditions. The results were recorded as 40 plants of P. australis/m2 of VSSF systems; bacterial cells concentration, 250 mg/L; pyridine concentration, 400 mg/L; temperature, 35 °C and pH, 8±2 for 10 hrs incubation duration. As a result, endophytic bacteria can break down toxic organic substances in combination with certain plants. When the endophytic bacterium, Acinetobacter was not used to enhance the role of Phragmites australis plants in the pyridine-phytodegradation process, the rate of phytodegradation was reduced to less than 30% at a pyridine concentration of 700 mg/L, indicating the importance of this endophytic bacterium in the pyridine phytodegradation process.