bluuebunny/crossref_metadata_2025_split huggingface dataset:
Acoustic vibrations of a gas with an inhomogeneous distribution of the speed of sound along the pipe
Authors: Semenova E V , Iovleva O V , Larionov V M , Larionova I V 
Published: December 2022

Abstract
In this paper, the pulsating combustion of a premixed propane-butane fuel with air in a vortex combustion chamber is considered. The conclusion of the refined frequency equation is made. The characteristic of the mixture supply system is given.
Plasma-chemical deposition of diamond-like coatings in capacitively coupled RF plasma in toluene
Authors: Zadiriev I I , Nikonov A M , Kralkina E A , Vavilin K V 
Published: December 2022

Abstract
Experimental study of the rates of plasma-chemical deposition of diamond-like coatings in toluene vapour in capacitive RF discharge was carried out. It is shown that in the RF power range of 100-300 W, the deposition rate is mainly affected by the toluene pressure in the vacuum chamber. The maximum deposition rate obtained was 4.15 μm/h.
Numerical study of the velocity distribution of the disperse component in the generation of a gas suspension flow by an electric field
Authors: Tukmakov D A 
Published: December 2022

Abstract
This paper presents a self-consistent mathematical model of the dynamics of an electrically charged dusty medium. The carrier medium was described as a viscous, compressible and heat-conducting gas. The simulated flow is self-consistent, the parameters of each of the mixture components are determined by changing the parameters of other components. The mathematical model took into account intercomponent momentum exchange and heat transfer between the dispersed component of the mixture and the gas. The equations of the mathematical model are supplemented with boundary conditions. The mixture dynamics equations and the Poisson equation describing the electric field were solved by a numerical finite-difference method. The channel is divided into two parts, in one part of the channel there is a homogeneous gas, in the other part of the channel there is a gas containing electrically charged particles. Under the action of an electric field, the particles of the disperse component begin to move, and a gas flow is formed. This paper presents the results of calculations of the physical fields of an electrically charged dispersed suspension.
Leptoquark production at LHC
Authors: Lejlić Ajla 
Published: December 2022

Abstract
Leptoquarks are hypothetical bosonic particles with a unique property; they can transform quarks into leptons and vice versa. There is a large number of scientific articles that cover questions of the leptoquark production and ways of their detection at Large Hadron Collider (LHC). LHC can produce leptoquarks in several different ways. The production mechanism that is best studied in literature is the pair production which is dominant for small Yukawa couplings. However, with the increase of the Yukawa couplings, the phenomenology of leptoquarks becomes more interesting and diverse. Namely, for large Yukawa couplings there are also additional leptoquark production mechanisms: t-channel production, single production, Drell-Yan di-lepton production and a resonant production. Moreover, there has recently been introduced a novel leptoquark production mechanism that is of the t-channel topology which gives asymmetric leptoquark pairs in the final state. The novel production mechanism has the potential to be complementary to other leptoquark production mechanisms in limiting certain parts of the parameter space that is described by the relevant Yukawa couplings and leptoquark masses. This article will provide the most recent studies of that particular leptoquark production mechanism at LHC.
Expression of expanded uncertainty in accreditation scope regarding ILAC P14
Authors: Kafedžić-Briga Armina , Džaferović-Mašić Emina , Mutapčić Nedžadeta 
Published: December 2022

Abstract
We discuss the scope of accreditation presentation in certificates and annexes issued by NABs for calibration laboratories (accredited in accordance with ISO/IEC 17025 [1]) in accordance with ILAC P14:2020 [2], with specific requirements stated in clause 4.3 for expression of measurement uncertainty (expanded uncertainty) regarding the unit. Due to the close link between accreditation, metrology, and standardization, we consult BIPM documents [3] and discuss the practice in metrological institutes when it comes to expressions of expanded uncertainty in order to give another view and arguments on ILAC P14:2020 requirement for expanded uncertainty to be expressed only in terms of measurand's unit. We present our case for the quantity of temperature, in addition to some other physical quantities with similar cases as temperature.
Nonlinear Force Affecting Stock Market Volatility
Authors: Rajilić Zoran , Gak Dragana Malivuk , Škrgić Enes 
Published: December 2022

Abstract
We transform stock price time series to the time dependent force parameters using Newton’s second law (a kind of the information filtering). The force acts on a point in the space of data. One of ten force parameters, if its value in a short time interval is extremely large, announces increasing of the time series uncertainty. This delayed effect of the nonlinear force we interpret as sensitivity to initial conditions, for chaos combined with stochasticity, considering the time series generated by nonlinear differential equations with fluctuating function included. Our aim is to improve understanding and rough prediction of processes in complex systems.
Control of odd and even harmonic generation by bichromatic elliptically polarized fields
Authors: Šišić Majra , Habibović Dino , Milošević Dejan B. 
Published: December 2022

Abstract
Using the CO molecule as target, we investigate high-order harmonic generation by a bichromatic elliptically polarized laser field. This field consists of two elliptically polarized components with the commensurable frequencies and mutually orthogonal semi-major axes. Both odd and even harmonics are emitted and their ellipticity can be large depending on the values of the laser-field parameters. It is often the case that the ellipticity of subsequent odd and even harmonics is substantially different so that, in order to produce a series of high-order harmonics with similar ellipticity, it is beneficial if the emission of odd or even harmonics is suppressed. In this paper we explore how this can be achieved using the ellipticity of the laser-field components and the relative phase as control parameters. For some values of these parameters it is possible to produce a comb of odd or even harmonics with similar ellipticity. These harmonics can later be employed for various applications the example of which is the generation of an elliptically polarized attosecond pulse train.
Learning about the force of gravity: findings from a survey research
Authors: Movre Šapić I , Vidak A , Mešić V , Dekanić K 
Published: December 2022

Abstract
In recent years of social distance due to the pandemic, augmented reality (AR) with its ability to overlay real phenomena with digital content has become even more attractive for making physics experiments accessible to every student. Therefore, we have recently developed an AR application for Android mobile devices that allows users to study how the gravitational force between two spherical bodies depends on their masses and their mutual distance. The purpose of this study is to investigate students' experience of using this application. To that end, 85 undergraduate students from the University of Zagreb were asked to use our AR application for completing a task related to the concept of gravity. Thereafter, they were administered five open-ended and 30 close-ended questions from three different questionnaires: System Usability Scale (SUS), User Experience (UX), and Handheld Augmented Reality Usability Scale (HARUS). Analysis of students’ responses revealed that students perceived the application as easy to use, consistent, self-explanatory, and enjoyable. Valuable feedback was provided on possible improvements to the application.
Teaching physics for high-school students through real-life questions and situations
Authors: Kujović Velida , Džaferović-Mašić Emina , Popara Merjem Ustamujić 
Published: December 2022

Abstract
We present different approach in teaching physics for high-school students for various branches of physics, such as thermodynamics, electromagnetism, etc. When we use term “different”, we want to offer complementary approach to the traditional one. This approach involves bringing everyday situations [1], such as drinking tea in a desert, making coffee, etc., to the physics classroom context without theoretical teaching with formulae, laws, and definitions in the beginning or opening of the class. The idea is to develop logical concepts to prepare students for theoretical teaching and introduce formulae to them in order to have a complete frame of specific physical phenomena. Some classes include practical demonstrations [2] where students immerse in discussion and spontaneously involve in growing logical concepts needed for better adoption of definitions, laws, and formulae [3].
Increasing crop diversity and yield of black rice through intercropping with mungbean at different row proportions on raised-beds
Authors: Wangiyana W , Karlina V , Ernawati N M L 
Published: December 2022

Abstract
Additive intercropping with legume crops such as soybean, peanut and mungbean was reported to increase growth and yield of red rice grown on raised-beds under aerobic irrigation systems. This study aimed to examine the effects of row proportions of rice-mungbean on growth, yield and land equivalent ratio (LER) of black rice in intercropping with mungbean grown on raised-beds under replacement series. The experiment was conducted in Beleke, West Lombok, Indonesia, from November 2018 to March 2019, which was designed according to Randomized Complete Block Design testing four treatments (RM-1:0= rice monocrop; RM-2:1= rice-mungbean 2:1 rows, RM-2:2= 2:2 rows, and RM-1:2= 1:2 rows). To measure LER, monocropped mungbean was also planted in each block. All crops were planted under 20x20 cm plant spacing. The results indicated that row proportions of rice-mungbean significantly affected numbers of green leaves, tillers, panicles and filled grains per clump, panicle length, grain yield and dry straw weight per clump, and total LER, which were higher on black rice intercropped with higher proportions of mungbean (RM-2:2 and RM-1:2) than on monocropped black rice. Black rice grain yield per clump tended to be highest in RM-1:2 but total LER was significantly highest (1.27 or 127%) in RM-2:2.
Improving sorghum seed vigor by priming
Authors: Arief R , Fatmawati  , Syahruddin K , Fattah A 
Published: December 2022

Abstract
Sorghum (Sorghum bicolor L. Moench) is the fifth most important cereal that is widely used for food, feed, and industrial purposes. Sorghum is cultivated mostly in the central and eastern parts of Indonesia. Sorghum seed viability and vigor influence its productivity by affecting crop growth and stand establishment. Invigoration can also be called conditioning or priming, and is one method that could enhance seed germination in the soil under abiotic stress. Some priming methods are hydro priming, osmopriming, and matrix conditioning. This paper will discuss research on sorghum priming which showed that many priming techniques could improve germination performance, speed of germination, and emergence uniformity.
Web-based geographic information system for sago plant production land in Merauke District
Authors: Wayangkau I H , Suwarjono  , Loupatty Martha 
Published: December 2022

Abstract
Sago is also a symbol of indigenous peoples, sago has become one of the important staples. The land tension of sago plant production in Merauke regency is supported by natural conditions and the climate is good for the development of sago plants. in the current condition, the community still feels difficult in the search for sago land because there is no publication media for the location of sago crop production land developed by the Merauke Horticultural Agriculture Office, by building this system will help the community in finding sago land, The system is a geographical information system of sago plant production land in Merauke district based on the web that uses the PHP and Xampp programming languages as a localhost server over the Apache HTTP server program, MySQL database and PHP programming language translator. System testing performed on this system uses the Black Box method and Beta testing. The results of testing using Black Box found that the geographical information system of sago crop production land in Merauke regency based on the web can accelerate the process of searching for sago land developed by the Department of Agriculture and Horticultural. Keywords: geographical information system, sago plant production.
Impact of climate change on wetland paddy yield in Indonesia: analysis from crop-cutting survey (Ubinan) results
Authors: Saputra H , Fahmid I M , Salman D , Rahmadanih  
Published: December 2022

Abstract
Our study aims to examine farmers’ perceptions of the impact of climate change on their wetland paddy yield in Indonesia. We analyse the results of the Crop-Cutting Survey or Ubinan conducted by BPS-Statistics Indonesia annually to measure the yield of food crops in Indonesia. Applying a logistic regression model to the microdata of the survey, we found that farmers experiencing the impact of climate change in the form of either drought or flood are more likely to experience a significant drop in the yield than those who did not experience those impacts. Moreover, the Kernel Density estimation plot of the yield pointed out that farmers experiencing the impact of climate change have lower harvest yields than those who did not face any impact of climate change. Our findings confirm the importance of climate change impact mitigation on wetland paddy cultivation in Indonesia. It is pivotal to maintain Indonesian food security since rice is still the main staple food for most parts of the country.
Technical efficiency analysis of maize farming in Wajak District, Malang Regency with data envelopment analysis approach
Authors: Saeri M , Antarlina SS , Arifin Z , Latifah E , Rahman MS 
Published: December 2022

Abstract
Technical efficiency is becoming essential indicators in estimating agriculture productivity, The aims of this research are to estimate the technical efficiency level and analysis factors affecting the technical efficiency level of maize farmer. The research was conducted in Wajak Sub-District of Malang Regency in East Java, Indonesia. Primary data was collected from 110 maize farmers and analyzed by data envelopment analysis and Tobit regression model. The result of this study claimed that farmers in the research location are technically inefficient because of the technical efficiency level less than one. Furthermore, the result of Tobit regression shows that the farmers’ education level has a significant and positive effect on technical efficiency level. However, the family dependency and farmer group participation have a significant and negative effect on technical efficiency level. This finding can be concluded that farmers need to minimize the input usage to increase the technical efficiency level.
Study of the efficiency N, P, and K fertilizer application to increase yield of sweet corn on inceptisol
Authors: Fauziah L , Rahmawati D , Ratnawati T , Hanifah S , Sa’adah S Z , Istiqomah N 
Published: December 2022

Abstract
Inceptisols, Oxisols, Vertisols, and Andisols are the main agricultural soils in Indonesia because they have a very wide distribution, Inceptisols 70.52 million ha (37.5%), Oxisols 14.11 million ha (7.5%), Vertisol 2.12 million ha (1.1 %), and Andisol 5.40 million ha (2.9%) most of which are paddy fields. Sweet corn is planted in paddy fields at the second or third planting times after paddy. Farmers generally use inorganic fertilizers that only contain macro nutrients N, P, and K and often do not add Granulated Organic Fertilizers (GOF) which also contains micronutrients. The aim of the study was to determine the efficiency of N, P, and K fertilizers added with the right dose of GOF. The study was conducted in Malang at 2019 with 9 combination treatments of N, P, K fertilizer and GOF, repeated 3 times. The data obtained were analyzed for using a Randomized Complete Block Design (RCBD) and continued with DMRT at α= 5%. The results showed that GOF are effectively combined with inorganic fertilizers and can increase agronomic levels by up to 25%. The use of 350 kg/ha-1 Urea+ 125 kg/ha-1 SP-36 + 125 kg/ha-1 KCl combined with GOF 2.500 kg/ha-1 could produce the highest harvest weight reaching 15.48 ton/ha-1.
Growth analysis of sweet corn plants treated with a soil amendment
Authors: Aisyawati Lina , Saeri Moh , Trijaya Dewi Sekarsari , Latifah Evy 
Published: December 2022

Abstract
This study examined the effect of Zeolite soil amendment on performance (growth and yield) of sweet corn.The experiment was carried out in rice fields in KP. Mojosari, Mojosari District, Mojokerto Regency in MK II 2021 (April to September 2021), with 10 fertilization treatments which are the combination of the best Zeolite soil improver fertilization dose on sweet corn plants, including treatment A (control), B (Urea 200 kg/ha, ZA 100 kg/ha, NPK 275 kg/ha, without Zeolite), C (Urea 200 kg/ha, ZA 100 kg/ha, NPK 275 kg/ha, Zeolite 1,250 kg/ha), D (Urea 200 kg/ha, ZA 100 kg/ha, NPK 275 kg/ha, Zeolite 2,500 kg/ha), E (Urea 200 kg/ha, ZA 100 kg/ha, NPK 275 kg/ha, Zeolite 3750 kg/ha), F (Urea 200 kg/ha, ZA 100 kg/ha, NPK 275 kg/ha, Zeolite 5,000 kg/ha), treatment G (Urea 150 kg/ha, ZA 75 kg/ha, NPK 200 kg/ha, Zeolite 1,250 kg/ha), H (Urea 150 kg/ha, ZA 75 kg/ha, NPK 200 kg/ha, Zeolite 2,500 kg/ha), I (Urea 150 kg/ha, ZA 75 kg/ha, NPK 200 kg/ha, Zeolite 3,750 kg/ha), J (Urea 150 kg/ha, ZA 75 kg/ha). ha, NPK 200 kg/ha, Zeolite 5,000 kg/ha), which was repeated 3 times, using a Randomized Block Design (RAK), analyzed by ANOVA if significantly different followed by Duncan’s Significant Difference Test (DMRT 5%). Parameters measured were leaf area, leaf area index, plant growth rate, net assimilation rate, ear length, ear diameter, weight per plant ear and cob weight per hectare. The results showed that Zeolite soil enhancer was quite effective in increasing growth which affected the yield of sweet corn obtained. Provision of Zeolite soil amendment as much as 1,250 kg/ha accompanied by Urea fertilization 200 kg/ha + ZA 100 kg/ha + NPK 275 kg/ha obtained the highest yield of sweet corn cobs of 22.35 t/ha.
Development strategy of Marigold flower farming integrated with Trigona bees in the ecotourism area of ancient tree “kayu putih”
Authors: Widiyanti N. M. N. Z. , Sukanteri N. P. , Suparyana P. K. , Wahyuningsih E. , Syaputra M. , Lestari A. T. 
Published: December 2022

Abstract
Marigold flower farming community is a group of farmers who carry out the processing production of marigold flower agricultural products. This study was to identify internal and external conditions, as well as determine strategies that can be used in developing an integrated marigold flower farm with Trigona bees. This research was conducted in the “Kayu Putih” Ancient Tree Ecotourism Area at Tabanan Regency in the Gumitir Flower Farmer Community, with a total of 26 respondents. The alternative strategy formulation process goes through two stages, namely: The data collection stage; and the Analysis phase. Based on the research results, the internal conditions in the development of Integrated Marigold Flower Farming with Trigona Bees are the availability of production facilities, short marketing chain, Religious facilities, Health products, lack of manpower, lack of skills, cultivation knowledge. While the external environment in the development of Marigold Flower Farming Integrated with Trigona Bees, namely: local government attention; establishing partnership relationship; development of technology and information; There are lots of bee-feeding flowers; competitive product price; changes in the weather; pest attack; Decreased tourist visits. These results place this farm in the position of cell V. The strategy used in cell V is a hold and maintain strategy. This strategy can be done through sales promotion with social media or extensive sales promotion, for example, by providing additional bonus products for purchases in large quantities and providing tour packages by adding flower and honey harvesting activities in the garden. Another strategy that can be done is to provide better services, such as continuous product availability, consistent product quality, timely and ordered delivery, and friendliness to customers and tourists when buying and visiting the Ecotourism Area of Ancient Tree “Kayu Putih”.
Implications of using fermentation plant extract formulations against pests and predator in rice plants
Authors: Farida  , Sjam S , Rosmana A , Sulaeha  , Dewi V S , Wardiman M A , Husain A 
Published: December 2022

Abstract
Currently the use of plant extracts to reduce pest attacks is a concern. Mixed formulation of two plant extracts Calatropis gigantea and Crescentia cujete was applied in the filed rice to assess the effectiveness of these formulations in reducing insect pest populations and predatory (natural enemies). The results showed that the combination of C. gigantea and C. cujete in one formulation could reduce the population of the main pests of rice plants and did not affect the presence of natural enemies (predators). The field trials showed that mixing C. gigante and C. cujete in liquid formulation reduced pest population compared the farmer with treatment synthetic pesticide. Population decrease of scipophaga innotata with range 21-77 percent, Cnaphalocrosis medinalis 25-79 percent. The abundance of pests was very low when using the plant extract formulation, whilst the synthetic pesticide generally had a higher number of pests. Predator numbers were higher in plant extract formulation and low with synthetic insecticide by farmer application. Synthetic insecticides have a very large impact on predators while plant extract formulations have no impact because the predator population is still higher than application by synthetic. Plant extract formulation (mixed C. gigantean and C. cujete) is more effective in reducing population pests than synthetic pesticides. The plant growth parameters were better in the treatment of plant extracts formulation than the application by farmer. This research indicated that using plant extracts formulation effective to control pests can be as effective compared as synthetic insecticides by using of farmer.