bluuebunny/crossref_metadata_2025_split huggingface dataset:
Study the life aspects of Eriasinsulana Boisd on some of the marshmallow family crops
Authors: Kadhum Mubasher Merri , Karem Malik H. , Jabbar Ahmed Sh. 
Published: October 2019

Abstract
Based on the importance of cotton crops Gossypium spp., Abelmoschus esculentus and Hibiscus sabdrriffa in Iraq, and because of damage caused by Eriasinsulana boisd cotton worm for these crops, Life data that helps to explain the persistence of this insect as a pest threatening the marshmallow family crops was studied and the main points for the development of effective control programs against it.The results of the laboratory study showed that all the life aspects of the insect were affected during the breeding of different plant families (cotton, okra, hibiscus). The shorter duration of larvae development was 16.27 days and the mean weight was 0.28 g when it was raised on the hibiscus plant and its length was 22.35 days and the highest rate was 0.35 g (18.42 days) and the average weight (0.32 g) on the okra. The highest survival rate was 57% for cotton, while the lowest for the hibiscus plant was 42%. The study showed that the host had an effect on the average period of development of pupa and adult females, with the highest rate of 12.35 and 55.17 days on cotton and the lowest rate of 10.75 and 31.37 days on the hibiscus, respectively. 0.31 and 0.27 g respectively on cotton, while 0.27 and 0.21 g respectively fell on the hibiscus. In terms of the average pre-laying period, the highest rate was 6.24 days on the hibiscus plant, corresponding to 3.89 days on cotton and 5.21 days on the okra, The longest period of laying the eggs was 42.12 days on the cotton, while at least 17.93 days on the hibiscus. The adult insect had the largest number of eggs fed on cotton (75.16 eggs / female) while the lowest number when feeding on the hibiscus (43.3) eggs / female. The results of the study showed that the highest rate of post-ovulation period for the female insect was 3.25 days on the hibiscus and decreased to the lowest rate (2.00 days) on the cotton.It is concluded that the growth and development of the insect was optimal for feeding on cotton.
Study Of Some Morphological Feautures Of Calcarious-Gypsiferous Soils And Its Management
Authors: Al-Naser Y H 
Published: October 2019

Abstract
The study was conducted to demonstrate some morphological features of gypsiferous soils and the possibility of managing these soils to improve their productivity. The soil samples were taken from three pedons (p1,p2,p3) for physical and chemical analysis. A plot experiment was conducted by randomized complete block design planted with barley seeds and three levels of npk. Results showed a sharp decline of organic matter, calcium carbonate and highest gypsum value with depth. Also results showed higher value for hue and value in p3 comparing with p1 and p2. The structure of soil surface was subangular blocky in p1 and p2, while it was structureless in p3. The boundaries at p1 and p2 were clear and wavy or irregular, but defuse and irregular at p3. The index accumulation values of clay (ci) showed pedogenic migration of clay from the surface horizons to the subsurface horizons. All soil pedons were classifieds according to soil survey staff (2006, 2015) to a series level: (fine silty clay, mixed, thermic typic calcigypsids). Results of the field experiment showed superiority of adding mineral fertilization in (plant height, spike longth, number of seeds per spike and seed weigh) compared to control treatment.
Effect of gibberellin GA3, boron and zinc foliar application on the growth and production of Hibiscus Sabdariffa L.
Authors: Kadhim Maseer Al-Karaawi Ayyed 
Published: October 2019

Abstract
This study was conducted in the fields of the center of planting and Development of the roselle in Al-Qadisiyah Governorate during the summer season 2015-2016 to study of the effect gibberellin acid (GA3), boron and zinc in the Growth and production of roselle plant. GA3 applied as perlex tablets form (1g) at a At a concentration of 2 g.L-1. Zinc was applied in zinc sulphate form ZNSO4.7H2O at a Concentration of 1 g. L-1(ZN 22.6%). Nutrients were applied at a 4-6 leaf growth Stage and applied once again after a month of the first application time. (RCBD) Randomize complete Block Design were used with three applicates. Means were Compared according to the test of the least significant difference of LSD at (5%). The Results of the study showed a significant superiority of the treatment of the triangular overlap between the acid of gibberellin, Boron and Zinc in each of plant Height (146 cm), the number of branches (25 branches, plant -1), the number of Leaves (657 leaf) and the leaf area (3.7 m 2). The total chlorophyll (Spad 45) and the Dry weight of the vegetative group (523.52g, plant-1), the number of walnuts (155.67 Walnut), the leaves of the dark leaves (44.17 g), and leaves thick (2.61 mm h-1) The Comparison treatment resulted 123.23 cm height, 15.67 branches, 6.67 leaf, 2.06 m2, 38.8 Spad, 470.80 g, 127.47 nut, 2.147 mm and 827.2 kg, respectively.
Chemical fragmentation and Bioavailability for Lead in some calcareous soils from the city of Mosul
Authors: Al- Hayani Abdul Sattar J Z , Al-Obaidi Mohamed A J 
Published: October 2019

Abstract
The first two sites were selected from the Aden district and geographically defined by coordinates N36° 21′ 21.5″ E43° 12′ 39.1″ In the course of valley Al-Danfili in the city of Mosul, which pours its cargo in the Tigris River at the site of the Al-Mazara district, which is geographically defined by coordinates N36° 19′ 50.2″ E43° 09′ 49.05″ We classified the soil suborder (Argids, Orthents) Respectively. The total content of the Lead was separated by extracting the soil in a sequential manner in order to identify the nature of its distribution within the different soil phases according to the following context: Water extraction and then (0.005M) (DTPA) Which is associated with carbonates with diluted hydrochloric acid solution (0.1M). The H2O2 extraction stage is 20% equilibrium for the purpose of determining organic matter content then associated with non-crystalline iron oxides (AFeOx) Amorphous Fe Oxides using a mixture solution (0.25M NH2OH. HCl + 0.25M HCl) (10: 1) (solution: soil), This was followed by the final phase, which included mechanical separation of sand, silt and clay digest each separately by using a wet digestion method to determine residual content(sand, silt and clay). Lead was measured in the solutions and extracts in the solutions above using the (GBC 933plus) atomic absorption device The results indicated the following: The water soluble fraction ranged from (0.33 to 0.34) mg.kg−1 and by (0.10%), exchange from (15.14 to 7.01) mg.kg−1 and by(3.31%), associated with oxides from (14.20 to 76.29) mg.kg−1 and by (13.51%), which is related to the organic matter from (29.60 to 23.00) mg.kg−1 and by (7.85%), associated with carbonates from (261.20 to 87.50) mg.kg−1 and by (52.04%), and associated with clay from (43.84 to 10.77) mg.kg−1 and by (8.15%), and associated with silt from (22.23 to 3.59) mg.kg−1 and by (3.85%) and associated with sand from (44.46 to 30.50) mg. kg−1 and (11.19%) of the total content from the Aden(clay) and the Al-mazara (sandy clay loam) districts Respectively. The physiochemical pathway for the distribution of Lead in the calcareous conditions prevailing in the following area is explained: Solid carbonates > Oxides > Sand > clay > Organic Matter> Silt > Exchange > Soluble.
Cytotoxicity study and bioremediation of petroleum contaminated soil.
Authors: Wali Alwan Saad 
Published: October 2019

Abstract

Abstracts. An experimental study was carried out to investigate the toxic effect of petroleum-contaminated soil by determining chromosomal aberration on mitosis of the onion root tip and demonstrating the role of mixtures or consortia of microbes in the detoxification of crude oil hydrocarbons. Soil samples were treated with different concentrations of petroleum (0, 2, 4, 8% of soil pot). All treatments with the exception of control were added 0.2 g consortium and one group was treated with only distilled water. To allow the degradation of oil components, all treatments were incubated in laboratory conditions for three periods (3,30,60 days). The results showed that chromosomal aberrations in root tip cells of Allium cepa are an abnormal anaphase with breakage, multipolar anaphase with breakage, normal metaphase and sticky metaphase, Mitotic index (MI) chromosomes that were calculated during prophase, metaphase and anaphase. The results show that adding a microbial consortium to the soil (0.2g/pot) where it recorded 600 divided cells per 1000 cells (IM=60) after incubation for 60 days, High level of crude oil 8% was caused decreasing of MI to 1.5, 3, 3.5 without any adding, while recording 35,46,50 (only distill water) in the control group. On the other hand, the high percentage removal of hydrocarbons by microbial activity with a low concentration of crude oil is 55% with increasing of time duration.
Plasma propulsion for telecommunication satellites
Authors: Conde L 
Published: October 2019

Abstract
Electric thrusters are used for in-space propulsion of spacecraft for a combination of practical and economic reasons. These devices that use electric power to accelerate the mass flow of the propellant at exhaust velocities are one or two order of magnitude faster than those achieved in conventional chemical propulsion. This feature results in significant propellant savings that allows longer mission times and heavier payloads, however, the thrusts achieved are lower for important electric power consumptions. The different electric thrusters that are currently used in Europe for both in-orbit corrections and also for orbit raising to the operational orbit from the separation stage of the launcher will be introduced. This propulsion system also serves to expel these vehicles from their orbit at the end of their useful life to control the increase of space debris in Earth orbit. Additionally, the characteristics of new low-power electric engines with thrust levels in the range 0.1-10 mN and electric power consumptions below 500 W will be discussed. These are required for flight formation, orbital corrections and end-of-life disposal in the new constellations of small satellites in low Earth orbit intended for planetary internet coverage and interactive television services.
NMR investigation of iron-containing magnetically ordered nanomaterial used for preparing of magnetic fluid
Authors: Mazur A S , Pleshakov I V , Khudyakov A V , Bibik E E , Kuzmin Yu I 
Published: October 2019

Abstract
The first observation of 57Fe nuclear magnetic resonance in nanostructured magnetite, used for preparing of magnetic fluid is reported. The radiospectroscopic technique required for the reliable spin echo signal observation is discussed. The data on resonance line associated with physical properties of the material, are presented.
Spatial charge relaxation in glasses poled in the air and argon atmospheres
Authors: Trufanov D A , Reshetov I V , Lipovskii A A , Tagantsev D K 
Published: October 2019

Abstract
Thermal poling of a multicomponent silicate glass was performed in air and in argon atmospheres at various voltages, and the temperature dependences of the depolarization currents (TSDC) in the poled glasses were studied. In addition, the concentration profiles of univalent and bivalent cations in subanodic regions of the poled glasses were measured with EDS and SIMS techniques. The difference in the displacements of bivalent ions at poling of the glasses in closed and open anode configurations allowed us to identify “frozen” spatial charge relaxation peaks observed in the TSDC measurements and to relate these peaks to hydrogen and bivalent metal ions relaxation.
A tunable spin wave photonic generator with improved phase noise characteristics
Authors: Ustinov A B , Kondrashov A V , Nikitin A A , Lebedev V V , Petrov A N , Shamrai AV , Kalinikos B A 
Published: October 2019

Abstract
Phase noise spectra of the microwave spin-wave photonic generator were measured for various lengths of the optical fibres. Results show that the increase in fibre length from 200 m to 4 km reduces the phase noise tending to a limit value around -146.5 dBc/Hz at a 10-kHz offset from a generation frequency of 10 GHz.
Determination of blood flow velocity by means of analysis of the laser speckle-field dynamics
Authors: Savchenko E A , Gudzlovenko N K 
Published: October 2019

Abstract
In this paper the method of microcirculatory blood flow velocity registration is considered. The proposed method is based on speckle pattern analysis. The measuring setup of blood flow velocity is presented. Using this setup, blood flow velocity of a group of people under various conditions has been studied and the results of these studies are presented.
Development of lidar system based on nanosatellite for composition of 3D space debris map
Authors: Andryakov A A , Malygin D V , Khabibulin A R 
Published: October 2019

Abstract
A CubeSat mission is described in this paper, which deals with the space debris identification, classification and aggregation. The mission is responsible for debris observation close to the most populated orbit by on-board laser illuminator (lidar) system. An optical scheme of lidar was described. The energy balance and range of work were calculated. The architecture and properties of CubeSat are based on the multi-purpose block-modular platform «Synergy» [1].
The influence of quantization of optimal FTN signals with PAM on correlation properties and level of out-of-band emissions
Authors: Ovsyannikova A S , Makarov S B , Zavjalov S V , Solomitckii D 
Published: October 2019

Abstract
Usage of faster than Nyquist signaling (FTN) in practice is limited by the complexity of the formation and detection devices. Optimal FTN pulses may be formed via digital non-recursive filters. One of the important parameters that affect the performance of such devices is the number of quantization levels. In this paper, the influence of the number of quantization levels for optimal FTN signals with pulse-amplitude modulation on spectral characteristics, correlation properties and the probability of error detection is investigated. It is shown that at least 64 quantization levels should be chosen to provide almost potential bit error rate performance and additional spectral quantization noise about – 40 dB for volumes of channel alphabet upto 8. Decreasing the volume of channel alphabet allows reducing the requirements for the number of quantization levels.
Errors in simplex data transmission channel based on visible light communication
Authors: Borodkin A I , Krasavtsev I A , Gareev E Z , Polukhin I S , Kozyreva O A , Shcheglov S A , Shiryayev D S , Odnoblyudov M A , Bougrov V E 
Published: October 2019

Abstract
We analyze the wireless visible light simplex data transmission channel based on visible light communication (VLC) technology and determine 2 main types of errors that occur while using a modern smartphone as a receiver. We have calculated highest probable data transfer speed in our communication channel, and have developed a cyclical data transmission system with bandwidths of up to 4 kbits at a distance of 1 m, using a conventional domestic LED illuminator equipped with a modulator as a transmitter and a developed client application for an Android smartphone with a standard camera module as a receiver.
Using of the rubidium – 87 quantum frequency standard in navigational systems
Authors: Valov A P , Davydov R V , Rud V Yu , Grevtseva A S 
Published: October 2019

Abstract
The article discusses the using of the rubidium – 87 quantum frequency standard for satellite navigation systems. A method for improving the parameters of the microwave excitation signal to enhance the short-term and long-term stability of the standard is proposed. The results of experimental studies are presented.
Screening of Marine Microalgae Collected from Wakatobi as Anti-Tyrosinase
Authors: Raharjo S , Fatanah V N , Susilaningsih D , Kasim M , Susilawati P E , Muzuni  , Rahman D Y , Tien  
Published: October 2019

Abstract
Three microalgae isolates from Wakatobi waters collected by LIPI have been cultivated, ie LIPI 13-2-AL018, LIPI 13-3-AL066, and LIPI 13-2-AL072. Furthermore, the isolates were grown to create a growth curve, this is to determine the harvest time of biomass. Each isolate had different biomass harvest times: LIPI 13-2-AL018 and LIPI 13-2-AL072 isolates were harvested on the 14th day, while LIPI 13-2-AL066 on day 12. After harvesting, the biomass was dried, destroyed the cell wall with sonicator. Extraction of secondary metabolite compounds was performed using three types of solvents, namely: ethanol, ethanol + n-hexane (1: 1), and diethyl ether. Based on the results of inhibition testing of tyrosinase it was found that the biggest inhibition was derived from extract of LIPI-13-2-AL066 isolate, using ethanol-hexane solvent.
Optimization of Total Anthocyanin Extraction from Brown Rice (Oryza nivara)
Authors: Anggraeni V J , Ramdanawati L , Ayuantika W 
Published: October 2019

Abstract
Brown rice contains anthocyanin compounds. Anthocyanin is a natural pigment that gives red color to brown rice. Anthocyanin is an unstable compound, so it is necessary to optimize the extraction method to find out the proper extraction method in obtaining the largest anthocyanin level in brown rice. Optimization of extraction conducted in this study include solvent, addition of HCl and size of brown rice Measurement of levels in this study using the method of differential pH with visible spectrofotometer tool. The results showed that extraction using methanol-HCl solvent was the best extraction process. As for the size of rice particles does not affect the amount of extracted anthocyanins.
Analysis of Argumentation Skills in Biological Learning in Senior High School Students
Authors: Astira S , Sajidan  , Dwiastuti S 
Published: October 2019

Abstract
This research was conducted to find out the students’ initial skills in empowering argumentation skills in biological learning in Senior High School students. The data to obtain the initial ability of students in the argumentation was drawn from written tests consisted of 2 questions that referred to the argumentation aspect indicator. Data analysis was done in a descriptive manner. This study involved all XII grade students of Mathematic-Science (MIA) program at one school in the Surakarta area. The results showed that students’ argumentation skills were still dominated in giving claims and reasons only, while students were still lacking in providing evidence and rebuttal. From this study, it was seen that students had difficulty in developing scientific argumentation skills because they experienced confusion in determining argumentation content. Thus, students needed teacher guidance in the process of arguing. Students’ argumentation skills were still lacking in training. Therefore, students needed to be empowered again.
Dynamics of Temperature and Concentration on Oxidation Reaction Using Reverse Flow Reactor With Periodic Feed Gas Like Square Wave Function: a Numerical Approach
Authors: Nuryaman A , Riyanto R , Saidi S 
Published: October 2019

Abstract
Dynamics of oxidation reaction using reverse flow reactor (RFR) are given by a set of convection - diffusion equations that containing the non-linear term corresponding to the reaction rate and provided with certain initial and boundary conditions. In this paper, we investigate the dynamic profiles of temperature and feed concentration on oxidation process using numerical simulation approach. Here we assume the process satisfies 1-D pseudo-homogeneous model and the feed gas form is square wave function. Several different operation parameters have simulated to see the influence towards temperature and feed concentration profile. The results show that period function, small switching time, medium gas velocity and small specific reactor wall surface will make the reactor operated longer.
Structural Equation Modeling Technique for Social Application of Information Technology User Requirements’ Identification
Authors: Jambakr M I , Yuzaherdi A F , Jauhari J , Putra A , Efendi R 
Published: October 2019

Abstract
One of the essential phases in software development processes is user requirements identification, commonly using qualitative methods. The Social Application of Information Technology is an implementation of information technology in social related aspects, such as Knowledge Sharing System. In the Social Application of Information Technology, besides elements of functionality but also the accuracy and representativeness of the users’ needs and requirements are important factors. In this study, a quantitative method with Structural Equation Modeling technique was utilized rather than commonly using qualitative methods, in identifying the users’ requirements in the software development of Knowledge Sharing System. Theory of Planned Behavior was used as basic theory. Data collected using questioners, and the sample distribution planned with 95% level of confidence. Samples selected randomly totaled 82 people from members of the AISEC, Sriwijaya University, Palembang. By counting all hypotheses those were related to the basic theory, results shown that the quantitative method with Structural Equation Modeling technique can be used to identify user needs in an effective, accurate, and precise significant representativeness.
Developing Competences of English Teachers in Secondary STEM Education Schools Track in Thailand
Authors: Sukkasame Nujaree , Buanil Watcharaporn , Udomsiang Prapaporn , Marwiang Metta 
Published: October 2019

Abstract
The purposes of this study are to investigate the competences of English teachers in Thailand and propose the teaching competence enhancement approach to meet the needs of 21st century English teachers for STEM track school. The documentary study was used as methodology in this study. The findings of this study demonstrated that the activity-based teaching allows students to practice communication skills effectively. Furthermore, English teacher’s competences to develop students’ English learning can be implemented by using five-step communicative teaching approach, including warm up, presentation, practice, production, and wrap up.
Trends and Research Issues of STEM Education: A Review of Academic Publications from 2007 to 2017
Authors: Chomphuphra Paranee , Chaipidech Pawat , Yuenyong Chokchai 
Published: October 2019

Abstract
STEM education (Science, Technology, Engineering, and Mathematic) research has been become more attractive area in science education for a decade. This study was aim to analyze research articles in a SCOPUS database and two journals which were not indexed in SCOPUS including Journal of STEM Teacher Education, and International Journal of STEM Education. The research articles during 2007 to 2017 were reviewed and analyzed according to the authors’ nationality, journals, STEM research topics. The research findings indicated that there were 56 published papers related to providing STEM learning activities in school setting, top three countries which published STEM papers over the decades were United States (46), Australia (2), Canada (2). Besides, the journal with the greatest number of published papers was Journal of STEM Teacher Education, with a total of 16 papers, and the second is International Journal of STEM education. The three popular topics which published in STEM papers were innovation for STEM learning, professional development and gender gap and Career in STEM, respectively.