bluuebunny/crossref_metadata_2025 huggingface dataset:
Control and testing of the additive systems color gamut in engineering
Authors: Golunov A V , Shcheglov S A , Golunova A S , Kolozova O A , Trapeznikova O V
Published: May 2020

The article discusses the issue of the additive color reproduction systems control in engineering. Additive technologies provide a wide range of possibilities for the formation of a three-dimensional product with the coloring of the product in mass. However, there is no technology for color management and control of distortion of the color formation of the cured material. In the course of the study, a method of color management in the process of manufacturing a three-dimensional model using CJP (Color Jet Printing) or Binder Jetting technology is proposed to ensure consistent color communication in the CAD system “program – 3D printer – material”. The notion of the additive system in engineering is implemented. According to the developed technique the performance of the color gamut of the additive system on the basis of plant ZPrinter 450 are specified.
Morphemic analysis of Uzbek nouns with Finite State Techniques
Authors: Bakaev I I , Shafiev T R
Published: May 2020

The article developed a mathematical model that describes the morphemic description of the structure of nouns in the Uzbek language. The developed model takes into account all forms of word-forming suffixes, affixes and creating word forms that belong to the lexical category of nouns. For the created mathematical model of word forms, an algorithm for morphemic parsing and determining the pre-ownership of word forms using finite automation is developed.
Two-dimensional data-block compression of information-measuring system algorithms
Authors: Levenets A V , Nefed’ev D I , Bazhenov R I , Masyagin V B , Beknazarova S S
Published: May 2020

The authors suggest a new approach to develop measurement data compression algorithms. According to that a data frame is considered as a bit sequence formed into a two-dimensional well-ordered linear structure. It is supposed that there is no explicit bind to the source data / specifications width within the collected structure. The researchers propose block compression algorithms. They take into account not only the relationship between one sensor readings in adjacent samples, but also the connection of the samples in one frame so that it is expected to contribute to higher compression efficiency. The studies of the proposed compression algorithms have shown that they can be effectively used for compressing data frames of information-measuring systems. The mid-compression ratio of the proposed block compression algorithms falls in the range 8.0 to 9.5, and a simple adaptive algorithm observed in the paper provides the maximum value of the average compression ratio.
Simulation of purposeful movement on the example of moving cars along the route graph
Authors: Purtov Andrey
Published: May 2020

The main topic of the article is the actual problem of organizing purposeful movement. The problems of coordinating the interests of organizers and participants of the movement, building incentives, goals, and decision-making procedures are considered. A simulation model of cars movement along the route graph has been developed. The route graph is linked to the map of Omsk. Simulation experiments were conducted. The simulation model is implemented in JavaScript. The model uses a prize function and a sample for routing. The results of simulation experiments demonstrating the influence of the sample parameters and the prize function on the time and cost of achieving the goal, the value of prizes are presented. The developed simulation program can be used to analyze purposeful movement along a directed graph in systems for various purposes.
Multidimensional model of heat-moisture transport in porous media
Authors: Ravshanov N , Shadmanov I U
Published: May 2020

A three-dimensional mathematical model and numerical algorithm for the process of heat-moisture transfer are considered in the article, taking into account such factors as heat dissipation and moisture release in a natural product, the effect of changes in temperature and humidity of the environment on storage and drying of porous agricultural products. The developed model and numerical algorithm make it possible to predict the changes in temperature and moisture content at arbitrary points of the porous body, and serve to prevent the loss of quality and spontaneous combustion of materials under solar radiation.
Bayes-Minkowski measure and building on its basis immune machine learning algorithms for biometric facial identification
Authors: Sulavko A E
Published: May 2020

In this paper we propose a new Bayes-Minkowski proximity measure that can be used to process correlated biometric, biomedical, and other type of data (with the normal distribution law or close to it). The Bayes-Minkowski measure is an antagonist criterion with respect to the Minkowski measure, since it shows opposite properties. It is possible to build a hybrid network of classifiers and apply immune learning algorithms to the network based on these proximity measures. It was demonstrated in the work on the example of tasks of identification and verification of a person’s personality by facial image. The achieved errors probabilities of person’s identification and verification by face features were: 0029 и 0.0017, respectively.
Two-grid algorithm for a system of singularly perturbed reaction-diffusion equations on Shishkin mesh
Authors: Tikhovskaya S V , Korbut M F
Published: May 2020

A system of two coupled singularly perturbed reaction-diffusion equations is considered. A cascadic two-grid algorithm of high accuracy based on a uniform with respect to small parameters convergent difference scheme for such problem has been developed. To increase the accuracy of the difference solution by an order, the Richardson extrapolation method was applied. The results of some numerical experiments are discussed.
Multi—facility placement on lines with forbidden zones and routing of communications
Authors: Zabudsky G G , Veremchuk N S
Published: May 2020

This article is about placement of interconnected facilities (equipment) in a plane on parallel lines with forbidden zones. Placement of the facilities inside of the forbidden zones is not possible. The facilities are connected to each other and with the zones by some communications. Communications (routing of communications) between the facilities and between the facilities and zones which are placed on different lines (adjacent lines) pass through a fixed vertical component (viaduct). It is need to place the facilities on the lines such a way that the total cost of communications between the facilities and zones will be minimal. There are many practical applications of this problem in science and techniques, for example, when designing engineering devices. Some properties of the problem are formulated. A mathematical model of integer nonlinear programming of the problem is constructed. It is shown that algorithms for solving of a problem with rectangular metric without the viaduct can be used for solving of the problem under consideration.
Computer simulation of three-layer systems based on ferromagnetic nanofilms
Authors: Belim S V , Larionov I B
Published: May 2020

Computer modeling of magnetization behavior of thin ferromagnetic Ising films separated by antiferromagnetic film was carried out. Metropolis’s algorithm was used for the simulation. Finite-dimensional scaling theory has been used. Phase transition temperatures were determined by Binder cummulants. Systems with different number of layers in ferromagnetic and antiferromagnetic film have been investigated. Temperatures of phase transitions in ferromagnetic and antiferromagnetic films are determined. A phase diagram of the system has been constructed. There are four phases on the phase diagram. Phase for implementation the spintronic devices is defined. The distribution of magnetization and chess magnetization across the layers of the system in different phases has been investigated.
The method of the research of residual gases in a tight case of quartz resonators
Authors: Belousov K A , Strunin V I , Khudaibergenov G Zh
Published: May 2020

Mass spectrometric analysis of closed-volume gases of quartz resonators-thermostats emitted by the materials used in the installation of the device. A measuring complex with a vacuum of 10−5÷10−6Pa has been developed. The mass spectra of the residual gases were obtained before the depressurization of the products in the DIL-14 housing. The temperature range of the study is 20÷160 °C.
Analyze and optimization parametrs for protatiping using 3D printer
Authors: Blokhin A V , Gritsay A S , Sapilova A A , Storozhenko N R , Goleva A I , Baeva M A
Published: May 2020

As part of this work, a simulation model was constructed to evaluate the print quality of three-dimensional objects using a 3D printer. A study was conducted using non-contact scanning of a 3D model and varying the parameters affecting print quality, followed by an assessment of the degree to which the printed 3D model corresponded to its standard using software. The result of this study is the obtained values of the optimal printing parameters of the 3D model, which allow to obtain a high estimate of the degree of correspondence of the printed 3D model to its standard, and, consequently, high quality printing on a 3D printer.
Mechanical stresses in aluminum nitride films formed by magnetron sputtering
Authors: Strunin V I , Chirikov N A
Published: May 2020

The results of studies of the dependence of the mechanical stresses of aluminum nitride (AlN) films obtained by direct current magnetron sputtering on the formation modes: substrate temperature, discharge power, ratio of nitrogen and argon fluxes at a pressure of 0.07 Pa are presented. It is shown that the minimum mechanical stresses are observed at a substrate temperature of 573-613 K, a power of 900 W and a gas ratio of 4/5 - 5/5, and are (15-22) * 108 N / m2.
Analytical and numerical estimates of the stress state of units of a mining shovel boom
Authors: Alshanskaya A A , Doronin S V
Published: May 2020

The boom units of a mining shovel are structurally complex metal structures of large dimensions. Traditional methods of design calculations for such structures are based on beam-type structural models, while the actual configuration is taken into account by introducing complex built-up sections which include sections of pipes, sheets, and ribs. The correspondence of such beam-type structural models has not been systematically studied yet, which leads to crack initiation and destruction of structures on the one hand and to an unreasonably high use of metal on the other. As a result of numerical analysis of the boom units in three-dimensional statement, the actual errors of beam-type structural models in characteristic sections of structures in the most complex design cases of mining shovel loading have been determined and analysed.
Revisiting the problem of choosing a downhole elastic wave generator for the technology of vibro-seismic impact on oil and gas deposits
Authors: Buryan Yu A , Kvasov I N , Sorokin V N
Published: May 2020

Currently, there are no sufficiently effective submersible vibrators for the implementation of a promising technology for vibro-seismic impact on oil and gas reservoirs. In this paper, we consider the possibility of using a downhole elastic wave generator based on a two-stage centrifugal nozzle for the vibro-seismic impact technology (VSIT). The equation of non-stationary fluid flow through the nozzle has the form of a nonlinear Van der Pol differential equation. In this paper, when using the method of studying this equation in the Matlab/Simulink application package, the principal possibility of tincture of a well generator to the dominant frequency of an oil reservoir is shown. The result of the study showed that when using an automatic control system, taking into account the hydraulic flow and pressure transmission line, the elastic wave generator can be controlled by the generation frequency with the accuracy necessary for vibro-seismic action on oil and gas formations.
Justification of parameters of a disk tool for cutting asphalt concrete
Authors: Furmanov D V , Tyuremnov I S , Chizhov V S , Lysakov N E
Published: May 2020

The paper reflects the results of the study conducted to determine how a free rotary instrument cuts narrow joints in asphalt pavements required for road construction. Based on the analysis of strength characteristics of different asphalt concrete grades, we developed a mathematical model of working process, and this model stands as the calculation basis. The mathematical model associates the main parameter — cutting resistance force — with the material strength values and geometrical characteristics of the working body and the working process. The results of experimental confirmation of mathematical model reliability are presented in the paper.
Effect of the payload mass on forces acting from the overhead crane drives during movement in the mode of suppressing uncontrolled oscillations
Authors: Korytov Mikhail S , Shcherbakov Vitaly S , Titenko Vladimir V
Published: May 2020

Using two-point Hermite splines, the reference spatial trajectory of a payload on a non-rigid pendulum suspension of an overhead crane was set as a combination of plane controlled oscillations in two mutually perpendicular movement directions of the bridge and the trolley. Under the absent uncontrolled payload oscillations, payload, suspension point coordinates and the rope deviation angles were calculated. Using the example of a constant spatial trajectory of the payload bypassing a single obstacle in the absence of uncontrolled oscillations, the payload mass effect on the forces acting from the side of the bridge drives and the trolley was investigated. The time dependences for horizontal components of the drive side forces were determined using an overhead crane simulation model developed in the Simscape Multibody Matlab application. Payload of various masses was repeatedly moved along the reference constant trajectory by rigidly setting the bridge and trolley movement trajectories. By virtual sensors, the forces acting from the drives on the bridge and trolley were evaluated. The payload mass effect on the maximum values of drive forces is established to be linear. The results can be used in the design and development of intelligent mechatronic control systems for overhead and gantry cranes.
The analysis of bending of the rotational pump’s screws taking into account the variable moments of inertia along the screw
Authors: Proskuriakov N E , Lopa I V
Published: May 2020

The analysis results of longitudinal and cross bends of screws of rotational pumps is carried out. Check of the offered model of cross-bending of the screw both taking into account, and without thread is executed. The interrelation of bend of the screw and decrease in the moment of inertia of its cross-section is revealed and the model of calculation of the screw on stability in pitch considering these parameters is received.
Human-induced changes in Indonesian peatlands increase drought severity
Authors: Taufik M , Minasny B , McBratney A B , Van Dam J C , Jones P D , Van Lanen H A J
Published: May 2020

Indonesian peatlands are critical to the global carbon cycle, but they also support a large number of local economies. Intense forest clearing and draining in these peatlands is causing severe ecological and environmental impacts. Most studies highlighted increased carbon emission in the region through drought and large‐scale fires, further accelerating peatland degradation. Yet, little is known about the long-term impacts of human-induced disturbance on peatland hydrology in the tropics. Here we show that converting natural peat forests to plantations can significantly alter the hydrological system far worse than previously recognized, leading to amplified moisture stress and drought severity. This study quantified how human-induced changes to Indonesian peatlands have affected drought severity. Through field observations and modelling, we demonstrate that canalization doubled drought severity; logging and starting plantations even quadrupled drought severity. Recognizing the importance of peatlands to Indonesia, proper management, and rehabilitating peatlands remain the only viable option for continued plantation use.
The sundown of home economical cilongok village: case of coconut farm agriculture
Authors: Arman A , Agustin H , Karim M , Kurniawan O , Purwandaya B
Published: May 2020

This study aims to provide a description on the development of coconut plantation in Cilongok Village. Brown sugar is an important and main source of income for the people of Cilongok Village, especially at Cilongok Sub-district. However, the recent development of the village as a district has an impact on coconut farming and the brown sugar home industry. The objectives of this is study are (1) to describe the recent development of coconut plantations and brown sugar production in Cilongok and (2) to provide a review of the development of Cilongok Village as a Sub-district Capital City towards the employment shifts of the agricultural workforce (penderes; in Cilongok Indonesia) in services, timber industry, and trade. The results show that the village of Cilongok as the capital city has an influence on the existence of coconut farming in the village. This condition affects social and economic conditions and developments. One of them is the social integration affected by money as a medium of exchange. The development of the service and building sector has an influence on the agricultural sector workforce. Initially, every household has a minimum of 2 penderes (the head of family and boys), but recently the number is decreasing, even none. Parents do not encourage their children to obtain a family economic source as a danger due to the risk and income considerations. Most generations of penderes choose to work as shop employees, wood industry and service workers.
The association of fecundity and morphometrics of mangrove snail Terebralia palustris Linnaeus 1967 in the mangrove ecosystem
Authors: Samsi A N , Andy Omar S B , Niartiningsih A , Soekendarsi E
Published: May 2020

Terebralia palustris is a snail that lives in the mangrove ecosystem. This snail is found around the mangrove roots. Snail fecundity is also influenced by several factors. This study aims to determine the association of fecundity with morphometrics and environmental factors. sampling is done randomly. The research station is 2. Each station has one plot measuring 10 m x 10 m and in it, there is a small plot measuring 0.5 m x 0.5 m in 4 pieces. Data were analyzed by regression using SPSS version 21 software. The average fecundity of snails in September was 85887.64 granules, October was 45962.67 granules, and November was 35668.62 granules. The average temperature of seawater is 35.20 ± 0.16 ˚C, the average salinity of seawater is 32.27 ± 0.63 ‰, and the average pH of seawater is 6.39 ± 0.09. The results of the regression analysis showed signs that the snail morphometry of T. palustris did not affect snail fecundity because the significance value was far above 0.05. The results of the regression analysis showed that acidity factors significantly affected fecundity with a significance value of 0.047 and the other factors is not affect.
Motivation of farmers to increase goats production
Authors: Rasyid T G , Rohani S T , Aminawar M , Darwis M
Published: May 2020

Goat is one of the livestock commodities which significantly contributes to the increase in community income. In addition to the economic benefits obtained, goat farming also has its own advantages. Raising goats does not require a large capital. In fact, it only needs a fairly simple maintenance system and goat livestock resistant to disease compared to other livestock commodities such as cattle and broiler farming. This becomes the reason behind many people in Jeneponto Regency are motivated to carry out goat raising efforts to increase the income of their families. This study aims to determine the motivation of farmers raising goats. The sampling was carried out by a simple random sampling technique of 60 farmers in Tamalatea District. Data collection was done through interviews and FGD using the Likert scale on each measured variable; 1 = disagree, 2 = doubt, 3 = agree. It was analyzed using descriptive statistics. The results showed that the motivation of farmers raising goats consisted of: (1) economic value; (2) request; and (3) the role of the government is in the agreed category.
Internal and external factors of rice farming in the coastal area
Authors: Saadah  , Amrullah A , Darwis  , Ibrahim T , Fudjaja L , Bulkis S , Dzulhajrah A S , Wahyudi D P
Published: May 2020

This research aims to determine and described internal and external factors, which become the strengths, weaknesses, opportunities, and threats of rice farming in the coastal area of Maros Regency. A sampling of the study area was carried out by the census method by taking the entire population into a sample of 23 farmers who were members of the Pajalayya Baru Farmer Group and key informants as many as two people consisting of village officials and extension workers. The result of this research identifies that there were four aspects of internal and external factors that influenced the development of rice farming in Kurri Caddi, which were strengths, weaknesses, opportunities, and threats. The strengths consist of the available workers, cultivation land, farming experiences, farmer’s productivity. The weaknesses consist of the lack of skills of the farmer, uncertified seed, unbalanced fertilizer use, bad-timing tillage, and farmers are reluctant to use new farming innovation. The opportunities consist of the emergence of new forms of employment, a group of farmers that provide the distribution of farming supports and facilities and strong community self-help. Threats consist of problems of road transportation facilities, attack of pests and diseases, Abrasion and erratic weather.
Livelihood strategy in fulfilling household needs of coastal communities
Authors: Rukmana D , Diansari P , Nadja R A , Rahmadanih  , Fahmid I M , Syahrullah  , Akhsan
Published: May 2020

This study aims to map the livelihood strategies carried out by coastal communities based on two livelihood bases; the agricultural sector and the marine sector. The livelihood strategy, which is a combination of capital and human resources, was influenced by the popular community social system. This research also aimed to analyze social systems that affect coastal communities in combining their capital and human resources. The research area was determined purposively, namely in the Punaga Village, Mangarabombang District, Takalar Regency. Determining the location of this study was based on the consideration that Punaga Village has potential resources that enable the community to have two or more jobs in fulfilling household needs. The livelihood strategy that has been applied so far can be divided into economic strategies and social strategies. Economic strategies include the agricultural sector and the marine sector. In the agricultural sector, coastal communities tried to increase the amount of paddy field production even though the land area was > 0.5 acres. Meanwhile, the marine sector used the potential of seaweed so that it becomes a production center. The social strategy was used to owe, save, and get a job in helping to meet household needs.
Pembollo’: a concept of plant-based traditional medicine among kaluppini indigenous people
Authors: Nurbaya  , Chandra
Published: May 2020

Traditional healing practice is a common practice among indigenous peoples in Indonesia and strongly influenced by their indigenous health system. They have traditional knowledge about diseases, traditional medicines that they employ in daily life as well as traditional practices concerning maternal and childcare. With a qualitative approach, this study aimed to explore traditional medicine applied among mothers in Kaluppini indigenous people. This study found that Kaluppini people applied traditional medicine to cure their sick children. Mothers give Pembollo’, kinds of traditional medicines, like first aid. Kunyi’ (Curcuma longa), daun paria (Momordica charantia), ca’ku (Kaempferia galanga), kaju canning (Cinnamomum verum), kariango (Acorus calamus Linn.) and panini (Zingiber Purpereum Roxb) are commonly used as pembollo’. They mixed them with wai (water) or wai nyio (coconut water) or cani’ (honey). Mothers will employ Ma’pasibali, a concept of combining traditional and modern medicines if the children are still sick. The findings indicate that Kaluppini people have a high belief in traditional medicines to cure their children and it is very important to conserve the biological diversity in their indigenous area.
Development strategy of coffee agribusiness
Authors: Summase I , Tenriawaru A N , Viantika N M , Amrullah A , Arsyad M , Amiruddin A , Hadman A B , Arhim M
Published: May 2020

This study aims to determine the coffee agribusiness development strategy in Benteng Alla Utara Village, Baroko District, Enrekang Regency. The number of sample farmers taken was 24 coffee farmers by simple random sampling. The data obtained were analyzed using SWOT (Strengths, Weakness, Opportunities, Threats) by looking for internal and external factors in the coffee agribusiness system in Benteng Alla Utara Village, then designing an appropriate strategy for coffee agribusiness development. The results showed that there were 4 strategies in developing coffee agribusiness in this region, namely by taking advantage of market opportunities, increasing the promotion of coffee products typical of the Benteng Alla Utara, Proposing the help of coffee processing equipment and machines by utilizing existing farmer groups and undertaking rejuvenation and maintenance activities of coffee plants by intensive.
Analysis of the relationship of soybean farmers response and income on The Pajale Special Efforts (UPSUS)
Authors: Fudjaja L , Tenriawaru A N , Mahyuddin  , Saadah  , Darwis  , Diansari P , Sulili A , Wirdansyah A
Published: May 2020

Soybean self-sufficiency has become the government’s primary target since 2015 along with two other food commodities, namely rice, and corn. The UPSUS program (Special Efforts) is one of the efforts to support soybean self-sufficiency. Special Efforts (UPSUS) are the main program of the Ministry of Agriculture to improve the welfare of farmers. With the UPSUS, it is expected that soybean production will increase. This study aims to determine the relationship between soybean farmers’ responses to farm income. The population of the study was farmers who were involved in the UPSUS Pajale Program as many as 150 people using the purposive sampling method. The data analysis used in this study is Chi-Square analysis. Chi-Square is a statistical test that is used to test hypotheses if the population consists of two or more classes where the data is categorical. The results of the study concluded that there was no relationship between the response to the Pajale Special Effort Program (UPSUS) and the income obtained by farmers.
Quality improvement of post-harvest red rice through grain germination
Authors: M R R Amir S , Rahman A N F , Syarifuddin A
Published: May 2020

Red rice is generally consumed without the polishing process, but only milled into brown rice. The results of rice milling are only wasted and used as animal feed, even though there are many nutrients inside that exceed the rice itself. With grain germination technology, it is expected that the nutrients in the husk can be absorbed into the red rice and improving its quality. This research was conducted to determine the effect of temperature and humidity on the immersion and germination of red rice grain and the best treatment to produce germinated red rice. The method of this research was carried out by soaking the grain in the water and then proceed with germination with varied temperature and humidity. The duration of grain soaking was 48 hours then incubated in a gunny sack with 20 °C, 30 °C, and uncontrolled temperature and humidity of 70%, 80%, 90%, and uncontrolled humidity until the grain germinates along 1 cm sprout. The research observed the effect of temperature and humidity on the length of germination. In addition, differences in the quality of rice produced were also observed by comparing the results and the quality standard requirements of rice produced. The results show that, as temperature and humidity increased, the germination time will be shorter. The fastest germination was resulted from a temperature treatment of 30 °C with 90% humidity and the control or without temperature and humidity treatment. Germination with 30°C temperature and 90% humidity, is the best treatment.
Shelf life study of Bolu Cukke using the Accelerated Shelf Life Testing (ASLT) method
Authors: Latief R , Farahdiba A N , A N Amalia A
Published: May 2020

The aim of this study was to determine the shelf life of Bolu Cukke in glazed paper packaging using the Accelerated Shelf Life Testing (ASLT) Method. Determination of shelf life using the ASLT method by knowing the critical moisture content and equilibrium content in Bolu Cukke. The results of critical moisture content and equilibrium content of Bolu Cukke indicate a number 2 indicating that it is at a critical point, shelf life is 6 days, with critical water content as much as 23.49% while the results using a 7-day labuza calculation showed no significant difference by storing it using critical water content. The results of the equilibrium value of 24.606% by producing a slope b value of 0.307 using the Henderson isothermic absorption curve with an MRD value of 3.1915. Estimation of shelf life of Bolu Cukke products using the labuza equation shows that the shelf life for Bolu Cukke products is 7 using glasin paper packaging which to protect the product from sunlight, air, and contamination of microorganisms. The change affected physically, chemically and microbiologically, which makes bolu cukke can no longer be consumed.
The making of smart and active packaging on tuna fillet
Authors: Julyaningsih A H , Latief R , Dirpan A
Published: May 2020

Indicator label were made by immobilizing indicator solution on Whatman paper with treatments A1: Methyl Red/MR (pH 4.40), A2: Methyl Red/MR (pH 2.20), A3: Bromothymol Blue/BTB (pH 5.80), A4 : Bromothymol Blue/BTB (pH 2.90), A5 : Methyl Red + Bromothymol Blue / MR+BTB (1:1) (pH5.10), A6 : Methyl Red + Bromothymol Blue / MR+BTB (1:1) (pH 2.55). Whatman papers were immersed in the indicator solutions for 24 hours, dried then glued on the plastic cover of tuna fillet packaging. The color of each paper was observed every day. The effectiveness of the label indicator was evaluated by observing the color change of the indicator label of tuna fillet packaging. Edible coatings were made from sago starch with the addition of 0%, 0.5%, and 1% lemongrass oil. Tuna fillet was immersed in the coating solution for one minute then dried. The edible coating was analyzed every 3 days for 18 days using biological analysis (TPC), physical analysis (color, weight, and organoleptic) and chemical analysis (the value of TVBN, pH, and TBA) to assess the effectiveness of edible coating on maintaining tuna fish fillet quality. The results indicate that the best indicator solution for indicator label was a solution of Methyl Red + Bromothymol Blue (1:1) (pH 2.55). This indicator solution was the most sensible solution in showing the color change as the result of the tuna fillet quality degradation. The best edible coating treatment, when applied on fillet tuna, was edible coating treatment with the addition of 0.5% lemongrass oil.
The effect of ultrasonication temperature on snakehead fish (Channa striata) dispersion
Authors: Rahmaniar  , Dirpan A , Mahendradatta M , Asfar M , Tawali A B
Published: May 2020

Dispersion of snakehead fish (Channa striata) is one of the development products from the supplement of snakehead fish. It is made for people who cannot consume supplements in pill form. The dispersion of snakehead fish that have been made before having a large particle size so that it was unstable. This research aimed to study the effect of ultrasonication temperature on snakehead fish dispersion. The making of snakehead fish dispersion was carried out with the ultrasonication method by Powersonic 405 frequency 40kHz for 60 minutes with temperature treatment of 30°C, 45°C, and 60°C respectively. The result shows that the temperature of ultrasonication has the effect of the ratio of phase separation and an increase in total dissolved solids.
Effect of temperature and humidity to the yield and quality of germinated rice (Oriza sativa L) produced
Authors: Nikmah  , Rahman A N F , Langkong J
Published: May 2020

Rice is the nutritious staple food which important for human daily consumption. The nutrients content in rice can be lost or reduced during the grain process. A method that can be implemented to prevent or reduced the risk of loss of nutrients content in rice is by germinating the grains. The germination of the grains will increase the nutrient content of rice and grain itself. The purpose of this research was to analyze the effect of water temperature and humidity on the quality of rice produced and to determine the best temperature and humidity treatment for the production of quality rice. The grain was soaked in water for 48 hours then germinated with variations in temperature and humidity until the grain germinates along 1 cm sprout. Duration of germination and the quality of rice produced were observed and compared to the yields, quality requirements, and the level of consumer acceptance of rice produced. The results show that germination time will fasten with increasing temperature and humidity. The best treatment during the process of the germinating grain towards the quality of rice was incubation under room temperature and humidity conditions.
Dynamic performance test of auger-type metering device for Variable Rate Fertilizer Applicator (VRFA)
Authors: Azis A , Setiawan RPA , Hermawan W , Mandang T
Published: May 2020

The auger-type metering device for variable rate fertilizer applicator (VRFA) was designed and considered to have a better performance compared to other types of metering device. Static performance testing has been done with very good performance results. The system can follow each dose instruction given both step response and stair-step response testing. The objectives of this study were to do dynamic performance tests and analysis of the auger-type metering device which was controlled using a proportional–integral–derivative (PID) controller. In this test, the variable rate fertilizer was mounted to a transplanter machine. A DC motor rotated the auger, and the motor speed was controlled using a PID controller. The step response test was conducted to get a dynamic calibration equation by measuring the fertilizer discharge at a particular set-point of DC motor speed. The results obtained showed that fertilizer discharge has a linear relationship with the motor speed (R2 = 0.984). Fertilizer distribution testing was conducted using a stair-step response. These test results showed that the fertilizer was uniformly distributed to the track. Similarly, the increase in the DC motor speed is correlated with the amount of fertilizer was distributed to the track.
Effectiveness of “Butterfly” rotary sprinkler on dry land
Authors: Faridah S N , Samsuar  , Suhardi  , Munir A , Achmad M
Published: May 2020

Sprinkler irrigation is an irrigation application technology, which has high efficiency in the use of water; it is very appropriate to be applied in a relatively dry area. In its application, the high effectiveness of sprinkler irrigation systems can only be achieved if properly designed irrigation system and is operated properly. This research was conducted by designing irrigation networks. The irrigation application uses a butterfly sprinkler with a nozzle diameter size of 2 mm and 4 mm and pressure treatment to get the effectiveness of the irrigation system performance. Butterfly sprinkler with a nozzle diameter of 2 mm, effectively used at a pressure of 10-20 Psi, with a spray radius of 3.90 - 5.70 meters, watering discharge 6.49 - 8.10 liters/minute and water uniformity distribution 88.3 - 90.8 %. As for the 4 mm nozzle diameter, it is effective used at a pressure of 15-30 Psi, with a spray radius of 4.90 - 6.00 meters, a watering discharge of 9.98 - 14.83 liters/minute and a water uniformity distribution of 90.4 – 91.7 %.
Development of solar and gas hybrid energy bed dryer with implementing multivariable expert system controls
Authors: Putra B , Waris A , Iqbal
Published: May 2020

This study aims to develop a bed dryer prototype with optimum use of energy sources (solar and Liquified Petroleum Gas (LPG) hybrid). The material used in this study was fresh cocoa beans (Sulawesi 2 clones) purchased directly from Pattalassang Village, Tompobulu Subdistrict, Bantaeng Regency. The energy sources used were solar energy panels combined with an LPG burner. The tests conducted consisted of: a) control system test, b) drying test, and c) energy consumption test. In the drying test, the setting point was 60°C and two methods of energy supply were (1) Solar and LPG hybrid energy, (2) LPG energy only. The test results show that the control system works well, and the flame of the burner can be set automatically at low, medium, and high along with the temperature in the drying chamber and the collector. The temperature of the dryer was very stable, and no overshoot, The settling time is quite short, which is only 5 minutes. Hybrid furnace operation was more efficient (gas usage was about 64.8% compared to non-hybrid). Hybrid furnace operation consumed only 0.116 kg/hour of gas while non-hybrid operation consumed LPG of about 0.179 kg/hour.
Planning the upstream agricultural landscape of the Jeneberang watershed using the bioregion approach
Authors: Dariati T , Firnawati  , Yanti C W B , Dungga N E , Iswoyo H , Mantja K , Zainuddin D U
Published: May 2020

This study aimed to plan the agricultural landscapes in the upstream area of the Jeneberang watershed using a bioregion approach. This research was conducted in the upstream area of the Jeneberang watershed precisely in the Pattapang Village, Tinggimoncong District, Gowa Regency, South Sulawesi from May to July 2017. The research was conducted using a field survey method and literature study, which included five stages, namely the preparation, inventory, analysis, synthesis and planning stages. The criteria for the classification of the bioregions were prepared based on the characterization of the biophysical and socio-cultural aspects of the Pattapang community based on the inventory, analysis and synthesis of the data obtained. At the planning stage, the conceptualization for landscape conservation is carried out, then the development of planning concepts and the end result is a sustainable agricultural landscape plan that can still meet economic needs. Based on the results of the bioregion analysis, the study area is included in the bioregion units of the Jeneberang watershed, namely the Jeneberang watershed upstream area, consisting of 70 sub-watershed units divided into 121 landscape units based on three biophysical characters (sub-watersheds, soil types and slopes) and 156 units a place based on the socio-cultural intrinsic value of land cover. The landscape plan for sustainable agriculture consists of 61.7 ha of residential space, agricultural area (35.4 ha of rice fields, 384.3 ha of monoculture fields and 780.94 ha of polyculture fields) and forests (89.6 ha of protected forests and 520.2 ha of production forest).
Orchid conservation in a small island: current study and challenges of Dendrobium striaenopsis conservation in Angwarmase island nature reserve, Moluccas, Indonesia
Authors: Broto B , Kuswoyo T H , Setiyani A D
Published: May 2020

Orchids are considered one of the most commercially valuable in ornamental plant. Dendrobium striaenopsis, an endemic orchid to Tanimbar Islands, Moluccas, is widely notable species for orchid hybridizing. However, with its restricted distribution to small islands, this species is prone to extinction. To date, the ecological aspects of D. striaenopsis are not well studied, thus can hamper its conservation efforts. 30 plots in 3 different types of habitat in Angwarmase Island Nature Reserve were surveyed to assess its abundance and habitat. The locals surrounding the reserve were interviewed to identify potential threats. 165 individuals D. striaenopsis were found during survey. The result indicated that D. striaenopsis was not host-specific orchid species. The species was found in 15 species host trees with Lumnitzera racemose was the common host species. Zone 2 (upper part of the main stem) was revealed as the most favorable part at the host tree (105 individuals). It was found that the habitat of the species was threatened by agriculture activities. Besides, D. striaenopsis was also traded illegally by locals.
Diversity and distribution freshwater ichthyofaunal of West Sulawesi
Authors: Nurjirana  , Afrisal M , Sufardin  , Haris A , Burhanuddin A I
Published: May 2020

The diversity of ichthyifauna species is very interesting to study, especially in terms of species inventory as an effort to reveal the biodiversity of aquatic species. Sulawesi is one of the locations in the Wallacea region which is the location with the most species diversity and the location where most of the endemic species found in Indonesia are found. This study purpose to determine the diversity and distribution of ichthyifaunal species in the waters of West Sulawesi, and evaluate the status of conservation based on data from the International Union for Conservation of Nature to determine the level of utilization of species in West Sulawesi. The study was conducted in February 2018 to May 2019, samples were collected from eight rivers from the estuary area to the upper stream of the waters of West Sulawesi. The number of samples that were collected was 771 fish samples consisting of 31 species of fish and from 10 families including, Family Ambassidae, Anguillidae, Gobiidae, Eleotridae, Mugilidae, Gerreidae, Apogonidae, Terapontidae, Lutjanidae, and Leiognathidae. From the total species found, the highest number of species was found from the Gobiidae family, where species from the Gobiidae family dominated at each research station. The conservation status of the fish obtained is in the data deficient status with three species, least concern with 28 species, and near threatened with one species. Distribution of species in the waters of West Sulawesi is spread throughout the Indonesian waters, and some of them are endemic to Sulawesi.
Butterfly abundance and presence of their host plant at Bantimurung-Bulusaraung National Park, Indonesia
Authors: Aminah S N , Nasruddin A , Abdullah T , Fatahuddin
Published: May 2020

The famous butterfly conservation areas in South Sulawesi, Bantimurung-Bulusaraung National Park, are gradually being replaced by intensively used farmland especially in lowland and submontane regions. The objectives of the research were to identify butterfly species and their host plant served as larvae food, nectar and pollen source in three different altitudes at Bantimurung-Bulusaraung National Park. The research was conducted based on transect methods at Bantimurung-Bulusaraung National Park, Maros Regency, South Sulawesi, Indonesia from April to October 2018. Butterflies and their food were observed in three locations at different altitudes of 0-300 m above sea level (asl), 400-700 m asl, and above 700 m asl. The observation indicates a variation in the butterfly species found in different altitudes based on the presence of host plants. A total of 59 individual butterfly samples collected were divided into four families: Papilionidae (7 species), Pieridae (2 species), Nymphalidae (1 species) and Saturniidae (1 species). A further dispersal study based on seasons is needed in order to build a good taxonomic database for Sulawesi butterflies conservation.
Evaluation of several tropical wheat genotypes (Triticum aestivum L.) on various water availability in the lowlands
Authors: M Farid BDR , Nurazika A D , Musa Y , Rafiuddin  , Amin A R , Kaimuddin
Published: May 2020

Wheat as a cereal crop has a strategic role in supporting food security and to meet human needs on food. Nutritional content of wheat is relatively higher than other cereal plants. This research aimed to study the adaptability, growth, and production of some wheat mutant lines at various water availability in the lowlands. The research was carried out in the Experimental Garden, Faculty of Agriculture, Universitas Hasanuddin from November 2017 to January 2018. Location of the trial was at an altitude of < 40 meters above sea level with an average temperature of 24 ºC in the morning and 32 ºC in the afternoon. A split plot design was employed in this study with the availability of water set as the main plot and the wheat mutant genotypes as subplots. Three levels of water availability was used, 81-100% field capacity, 61-80% field capacity, and 41-60% field capacity. The wheat mutant genotypes used consisted of 15 genotypes (13 mutants and 2 comparative varieties). The results of the research show that wheat genotypes grown in the lowland that showed better production in restricted water availability (61 - 80% of field capacity) were Nias 250 4.6.2 (0.95 g. plant−1), and Nias 350 3.8. 9 (1.10 g.plant−1). Whereas in the 41 - 60% of the field capacity, the Nias 250 4.6.2 and Nias 350 3.8.9 produced better yield of 0.40 g.plant−1.
Colchicine induced polyploidy in Common Ice plant Mesembryanthemum crystallinum L
Authors: Qalby N , Sjahril R , Dachlan A , Sakae A
Published: May 2020

The aim of this research was to obtain optimum concentration with mutation breeding techniques by using colchicine for polyploid induction in the common ice plant Mesembryanthemum crystallinum L. The common ice plant Mesembryanthemum crystallinum L wild type seed were soaked in five levels of colchicine concentration: 0% (control), 0.01%, 0.05%, 0.10% and 0.20% for 24 hours. Seeds were germinated in petri dish using growth medium with compound of 1.15 gr ml half strength MS salts, 0.5 ml B5 vitamins, 0.2% (w/v) Sucrose 1gr, 25 mg L−1 myo-inositol and Agar. After 15 days, seeds germinated and then the young plant were transferred to a fresh medium soil. The observation parameters consisted of leaf thickness, width of the leaf, and lenght of the leaf, calculated from 1st month until 8th month. The observational data obtained were analyzed in variance and if the treatment has significant effect, then the follow up test will be done with DMRT test at 95% confidence level. For polyploidy analysis was conducted using Flow Cytometry. The results show that colchicine can affect the vegetative growth and the number of chromosomes from Mesembryanthemum cristallinum L. plants. The colchicine treatment of 0.10% was the best treatment compared to other treatments in the parameters of the length, width and thickness of the leaves. Use of colchicine treatment of 0.10% changed the chromosome number of the Mesembryanthemum cristallinum L. plant from diploid (2n = 18) to Octaploid (8n = 108).