bluuebunny/crossref_metadata_2025 huggingface dataset:
The effect of water clover (Marsilea crenata) extract addition in egg yolk and skim milk extender on frozen goat semen quality
Authors: Wahjuningsih S , Ciptadi G , Pridiawati K
Published: December 2019

Frozen semen has of longer storage time, but the effect of cold shock during processing reduces the semen quality. Antioxidants in water clover extract are expected to be able to maintain the quality of frozen semen. The study aimed to evaluate the effect of addition of water clover extract (WCE) in the base semen dilution (egg yolk-skim milk) to the quality of post-thawing semen. The material used in this study was goat semen. There were four treatments: T0 as control (base dilution + 0% WCE), T1 (base dilution +1% WCE), T2 (base dilution +3% WCE), and T3 (base dilution +5% WCE), with ten replications each.. This study used a randomized completed design, ANOVA, and continued with Duncan’s Multiple Range Test. The results showed that the addition of water clover extract to egg yolk skim extender had a significant effect (P <0.05) on the motility of individual spermatozoa, viability and membrane integrity, but didn’t have a significant effect (P> 0.05) on sperm abnormalities. The research concludes that the addition of 3% water clover extract in egg yolk skim milk extender was the best concentration to maintain the quality of frozen goat semen.
The effects of graded levels of fermented duckweed in quail diets on egg production and yolk cholesterol
Authors: Ayuni Y A , Syamsuhaidi  , Wiryawan K G
Published: December 2019

This study aims to examine the effect of feeding graded levels of fermented duckweed meal (FDM) in quail diets on production performances, egg internal quality and yolk cholesterol. A total of 100 two- months-old of quail layers (Coturnix coturnix japonica) were randomly allocated into four dietary treatments, in which each treatment consisted of five replications with five birds each according to a completely randomized design. The FDM used in each treatment were 0, 5, 10, and 15%, complementing other feed ingredients. Observations were conducted for 6 weeks following a week of adaptation to diets and environment. On the last two days, six eggs from each replication were collected for determination of internal qualities and yolk cholesterol. Result shows that daily egg production varied from 66 – 76%. Egg production of birds received diet with 10% FDM was not different (P>0.05) from those of control, but those fed on diet with 15% FDM was significantly lower (P<0.05). Egg weight and yolk weight decreased when level of FDM increased, but eggshell and egg yolk cholesterol were not affected (P>0.05) by dietary levels of FDM. The results suggest that fermented duckweed meal using mixed culture probiotics can be fed up to 10%.
Genetic Identification of POU1F1|PstI gene of Lakor Goat from Lakor Island, Southwest Maluku Regency
Authors: Volkandari S D , Kakisina P , Rumanta M , Kunda R M
Published: December 2019

Lakor goat is a domestic animal from Lakor island in South West Maluku Regency. They successfully survive and reproduce with limited water, grass and high temperature. Growth traits is an economic trait which important for breeding strategy (productivity improvement). Pituitary Specific Transcription Factor 1 (POU1F1) is otherwise known as PIT1 gene plays a role of growth and carcass traits. The objective of this study was to identify the POU1F1 gene in Lakor goat from Lakor island in Southwest Maluku Regency. Sixty-three samples of hair tail were collected from three different locations: Ketti Letpey (18), Werwawan Jamluli (26) and Letoda (19). DNA was extracted by DNA isolation kit. POU1FI gene was amplified using PCR technique while genotyping used PCR-RFLP with PstI restriction enzyme. Result showed that only one genotype (TT) was found and monomorphic. It may be caused remote area and limited of ram that indicated inbreeding has occurred. Inbreeding rate or coefficient study and introgression of ram from out of Lakor island by Artificial Insemination (AI) or natural mating is needed.
Effect of Leucaena leucocephala substitution on in vitro rumen fermentation and methane emission in thin tailed-sheep
Authors: Muhlisin  , Yusiati L M , Hanim C , Anas M A , Muktiari B N
Published: December 2019

This study aimed to evaluate the effects of substitution of Leucaena leucocephala (LL) leaves on in vitro rumen fermentation and methane emission in thin tailed-sheep. Rumen fluid were collected form two thin tailed-sheep fed with mixed-forages. The basal diet used in in vitro study consisted of 30% of concentrate and 70 % of forages. LL leaves substituted the forages of basal diet by 10% or 25 %. Methane production, carbon dioxide (CO2), ammonia concentration, microbial protein, protozoa, volatile fatty acids (VFA) were obtained according to in vitro gas production methods followed by microbial diversity evaluation. Substitution of LL leaves reduced (P<0.05) the pH, ammonia and microbial protein regardless percentage of substitution. Protozoa counts lowered as the LL leaves increased (P<0.05). However, there were no significant effects of LL leaves substitution on VFA production, CO2 and methane emission. It can be concluded that substitution of LL leaves to forages up to 25% was not enough to reduce methane emission although some ruminal fermentation parameters were affected.
First molecular identification of Fusarium fujikuroi causing pollen rot of palm trees ( Phoenix dactylifera L.) in Iraq and evaluation efficacy of some nanoparticles against it
Authors: Abedalred Estabraq M. , Ismail Waref M. H. , Abdulmoohsin Rajaa G. , Al-Karhi Mytham A. J.
Published: December 2019

This study was carried out to identify the causal agent of root rot on date palm in major growing areas in Iraq. As well as, the efficiency of ZnO and MgO NPs were assessed against the pathogen. Microscopic examination and morphological characterization revealed that Fusarium sp. was present in all examined samples and was the most pathogenic fungi. The PCR specificity identification based on the internal transcribed spacer (ITS)/5.8S regions showed that the pathogenic fungus was Fusarium
fujikuroi. The F. fujikuroi inhibited seed germination 53.55% compared with seed germination of 81 % in control. All concentrations (1,2,4 g/l) of ZnO NPs proved to be effective against F. fujikuroi particularly at concentrations 4 g/l with inhibition percentage exceeded 74.05%. Although, the same concentrations of MgO NPs did not show same inhibition capacity against the same pathogen comparing with ZnO NPs, they were significantly better than in control. The results indicate clearly to possibly to use the fungicides with ZnO and MgO NPs particularly at concentrations 2,4g/l in management of pollen rot of date palm trees. Information from this study might assist scientists to design effective strategies in controlling date palm diseases.
Evaluate the efficiency of Bonanza weedicide to control Cuscuta pentagona on eggplant
Authors: Al-Gburi Bashar Kadhim H. , Mohammed Akeel Emad
Published: December 2019

Field dodder (Cuscuta pentagona) is a predominant plan parasite on Solanaceous vegetables in Iraq. Series of field experiments were carried out in Najaf province during 2018 season to evaluate the efficiency of Bonanza to controlC. pentagonaparasitizing on eggplant. Results highlighted that there were significant differences in all studied indicators in comparison with control treatment. Bonanza treatment was greater in term of leaves number, surface area, plant height, dry weight of root and shoot, less time to mature the first fruit and increasing the production of fruits for each plant. Leave contains of carbohydrates, mineral elements, salicylic acid, chlorophyll, total phenols and plant hormones (IAA, GA3) were increased compared to control treatment. Fruit contains of Ascorbic acid and total soluble solids were also increased. Bonanza weedicide was controlledC. pentagonaon treated plants as well as increased early and total field productivity respectively (8.016, 67.68 t/ha−1) in comparison with control (6.690, 40.80 t/ha−1). GC-MS analyses showed that there is no weedicide residues on fruits treated with Bonanza after ten days.
Impact of hatching systems and different storage periods on hatching parameters of broiler breeder eggs
Authors: Alaamery L F N , Aldhanki Z T M.
Published: December 2019

This experiment hypothesized that using on farm hatching system (OFHS) could decrease the negative effects of prolonged cold storage periods on hatchability parameters of broiler breeder eggs in comparison with traditional hatching system (THS). Five hundred and forty hatching eggs (57.37+1.29g) were distributed randomally into six treatments and 90 (eggs) replicates per treatment, as follows; eggs that did not expose to cold storage (12 to 15 ºC and RH was 60-70%) and incubated under THS and OFHS in first and second treatments respectively, in third and fourth treatments, eggs were cold stored for 4 days and incubated under THS and OFHS respectively, whereas, in fifth and sixth treatments eggs were cold stored for 9 days and incubated under THS and OFHS respectively. OFHS procedure involving combined last phase of incubation (in the hatcher) with first brooding period in farm, by putting fertile eggs in baskets 30 cm above the floor, and exposed fertile eggs to special environement (34-35 ºC, RH>40%), wheares, THS use a standard procedure followed in commercial hatcheries Most of hatched chicks (59.14%) spereaded for 12 hours, from 468 to 480 h, wheares, the rest of chicks hatched after that, in addition, THS had a siginificant increase hatchability of fertile eggs compared with OFHS, furthermore, the interactions between two factors revealed that using OFHS with 4 days of cold storage had no significant differences compared with THS without cold storage, which mean that OFHS could decrease the effect of storage periods, and the same trend appeared with 9 days of cold storage. In conclusion, OFHS could participate in constrained hatching windows and improve hatchability of fertile eggs with prolong periods of cold storage in comparison with THS.
Comparative study to evaluate productive performance of Iraqi Turkey female Strains.
Authors: AL-Janabi Y A M , Khafaji S S , ALJanabi T K , Altaie S M S , AL-Nedawi A M
Published: December 2019

The turkey females were randomly distributed on four groups, each group consisted of 12 birds depend on strain. The strains as follow, (T1): red turkey strain, (T2): bronze turkey strain, (T3): white turkey strain, (T4): black turkey strain. Each group constituted from 3 replicates and each replicate has 4 females. All birds housed under same environmental conditions. Feed and water were available (ad libitum) for all the period. Birds were fed on diet contains 20% crude protein and 2950 Kcal metabolic energy / kg through the experimental period. The flock was reared in a ground cages (pens) during the experiment period. Eggs were collected twice daily. Black turkey strain achieved the highest results, whereas the red strain recorded the lowest results in all traits measured in this study, also white turkey strain had superior on bronze turkey strain in all traits. Results revealed that strain had Significant effected on egg production rate, cumulative eggs number, egg weight, egg mass and feed conversion ratio, but, there was no significant effected for strain on feed intake.
The comparison of several methods for calculating the degree of heritability and calculating the number of genes in maize (Zea mays L.). I. Agronomic traits
Authors: Hadi B H , Hassan W A , Wuhiab K M
Published: December 2019

The objective of present study was to compare of several methods for estimating the degree of heritability and calculating the number of genes using generation mean analysis of maize (Zea maysL.). The experiment was conducted at the field of Field Crop Dept. College of Agric / Univ. of Baghdad, for many seasons, spring and fall seasons 2009, 2010, spring 2011 and fall 2013.Six diverse inbred lines were crossed to produce F1,F2,BC1 and BC2 for four superior crosses.Broad-sense and narrow sense heritability estimates based on variance of different generations. The results showed that the four formulas used to estimate the heritability were different in estimating the values of heritability of different traits, as well as the different crosses used in the study. The broad sense heritability was differed according to the components of the formulas used to estimate. The number of genes that controlled the trait differed according to the different method of estimation and according to the studied trait, and to the all crosses. The highest number of genes (for all formulas) for plant yield, ranging from 15.85 (cross 4) to 155.7 (cross 2), because the yield is complex quantitative trait of several components, so the number of genes they control are the sum of genes that control the components. The inbreeding depression differed according to the parents involved in the crosses, and according to the studied trait, the inbreeding depression ranged from -7 for number of branches/tassel of cross 1 and leaf area of cross 3 to 68 for grain yield of cross 2. We can conclude that the best formula to estimate heritability depends on experimental design and methods of breeding.
Effect of barassinolide on growth characteristics of wheat (Triticum aestivum L.) under water stress
Authors: Toman S S , Jasim A H , Kadhim Z K , Hassan A A H , Hamzah R M
Published: December 2019

This experiment was conducted in the laboratories of the Seed Testing and Certification Division-Babylon province in 2018 in a completely randomized design (CRD) with four replicates and two factors. The first factor included the addition of polyethylene glycol 6000 (PEG 6000) with three levels of water stress of 0 bar, -6 bar, and -9 bar which are herein denoted by S1, S2, and S3, respectively. The second factor included three stimulation treatments of wheat seeds by soaking the seeds in the plant hormone, Brassinolide for 24 hours with concentrations of 0 mg liter-1, 2 mg liter -1, and 4 mg liter-1 which are denoted by B0, B1, and B2, respectively. The results showed that water stress adversely affected wheat seedling characteristics. With the water stress level S2, the lowest average period of germination initiation was 3.33 days, germination period was 3.38 days, drought resistance index at germination reached 1.01, total chlorophyll content was 27.91 mg/100 g fresh weight, and gibberellin content was 29.8 micromolar. The treatments with Brassinolide achieved a significant improvement in plant characteristics where B2 treatment realized the lowest average period of germination initiation of 2.58 days and drought resistance index during germination of 1.11. B2 treatment also achieved 22.13% increase in total chlorophyll content, 66.53% increase in gibberellin content, and 43.81% increase in Indole-3-acetic acid (IAA) compared to the control treatment B0 without Brassinolide.
Effect of planting date and spraying of humic acid in the growth traits and active compounds of Fenugreek (Trigonella foenum – graecum L)
Authors: Majid H A , Salim H A , Fahmi A H
Published: December 2019

The study was conducted at the Crops Research Station, College of Agriculture, University of Diyala during the years 2017-2018 to evaluate the effect of planting dates and spraying of humic acid in the growth characteristics and active compounds of Fenugreek (Trigonella foenum –graecum L). The experiment was carried out according to factorial arrangement in a complete randomized blocks design (RCBD) with three replicates and two factors, the first include planting dates (15/10,1/11,15/11) and the second is spraying of the humic acid at a concentration of 2 and 4 ml / L−1. Results revealed that the planting dates had a significant effect in the studied traits, the first date (15/10) recorded the highest rate of plant height (84.89 cm), seeds yield (7.805 g / plant−1 ), seeds yield / hectare (770.2 kg / h−1), number of branches (9.67 branches / Plant−1), number of leaves (146.6 leaves / plant−1), dry plant weight (20.11 g/plant−1), number of pods (47.33 pods / plant−1), number of seeds (14.44 seeds / pod−1), weight of 100 seeds (1.502 g) and the active compounds such as Choline (170.99 mg/ml−1), Trigonelline (305.73 mg/ml−1), Carpine (95.89 mg/ml−1) and Gentianine (191.11 mg/ml−1). The spraying of humic acid at a concentration of 4 ml / L was superior significantly in all traits such as plant height (74.67 cm), seeds yield (7.220 g / plant−1), seeds yield / hectare (710.0 kg / h−1), number of branches (8.11 branches / plant−1), number of leaves (61.00 leaves / plant−1), dry plant weight (20.44 g/plant−1), number of pods (38.22 pods / plant−1), number of seeds (14.00 seeds / pod−1), Choline (163.61 mg/ml−1), Trigonelline (283.86 mg/ml−1), Carpine (83.92 mg/ml−1) and Gentianine (183.03 mg/ml−1).
The effect of foliar application of the bio-stimulant “Felloton” on growth and yield of wheat.
Authors: Assal B A , Khalaf I T , Kadheim H , Arak R R
Published: December 2019

A field experiment was carried out to study the effect of spraying a sea weed extract with different concentration on growth and yield of two wheat cultivars (Barcelona and IPA99). The planets were fertilized with 40Kg N + 40Kg P hectare−1 as basal application. At the jointing stage the nutritional extract was sprayed with the following concentrations (control, 200 ml, 300 ml, 400 ml, 500 ml/100 liter of water). The experiment laid out was in split-plot RCBD. The concentrations occupied the main plots and, the varieties had the sub-plots with three replicates. Results showed that Barcelona variety out yielded IPA cultivar on the over whole studied traits (plant height, leaf number, flag leaf area, plant dry weight, spike length, number of seed/spikes, weight of 100 grain, grain, and straw yield. The concentration 300 ml/100 liter of water gave the highest means. There was no significant difference between control with 200 ml/100 liter of water and 400 ml with 500 ml/100 liter of water in planet height, number of leaves, planer dry weight, spike length, number of seeds/spikes, weight of 100 grain, grain, and straw yield. Barcelona variety gave 5.16 ton of seed yield compared with 4.83 Ton hectare−1 for 1PA cultivar. The interaction between Barcelona and 300 ml/100 liter of water gave the best results.
Influence of different natural media on production of myco-diesel
Authors: Shafiq S A , Chechan R A
Published: December 2019

The current study was an attempt to produce mycodieselusing by six oleaginous fungal isolatesAspergillusfumigates, Aspergillusterreus, Aspergillusflavus, Trichodermaharizanum, Penicilliumsp. and Fusariumgraminearum during the culturing on natural culture media from various types of agro-wastes as prospective nutritional sources (almonds husks, peanut husks and sunflower husks).The results of biomass (dry weight) showed the higher biomass value was obtained using, almonds husks firstly (4.54, 4.64, 3.30, 3.04, 1.02, 1.00 ) g / L for six oleaginous fungal isolates A. fumigatus, A.terreus, T. harizanum, F. Graminearum, Penicilliumsp. and Fusarium graminearum respectively then followed peanut husks and sunflower husks. Likewisethe height yield of lipids using almonds husks forsix oleaginous fungal isolates were recorded high lipid productivity compared with peanut husks and sunflower husks (0.77, 1.13,0.30, 0.45, 0.05, 0.03) g / L respectively. Furthermore, the qualitative analysis of the lipids contents by gas chromatographywere identified the presence of palmitic, oleic acids, stearic acid and linoleic acid in all isolates or fatty acid methyl esteranalysis showed the predominant of saturated fatty acid than unsaturated fatty acid this indicates that the fungal lipid obtained has the same properties of biodiesel and the saturated forms give more favorable properties of biodiesel and for optimized biodiesel.
Comparison between protein and amino acids of mushroom Agarieus bispours with some kinds of meat and meat’s products
Authors: AL-Hussainy K S J , AL-Fadhly N K Z
Published: December 2019

Results indicated that the percentage of protein in mushroom was approached with it in sheep’s meat, but it was higher than the others. Also, the protein was higher than eggs, cow’s milk, sheep’s milk and cheese of cow’s milk, while it was lower than it in cheese of sheep’s milk which contained the higher one among these samples. Results show that sheep’s meat contained highest percentage of Valine and Lysine while it contained lowest percentage of Isoleucine. Fish contained highest of Threonine and Isoleucine, but shrimp surpasse in Leucine. However, eggs contained highest of Phenylalanine and cow’s milk was rich in Methionine. Threonine, Methionine and Lysine were found in lowest percentage in eggs, while cow’s milk contained lowest of Leucine and Phenylalanine, also Valine was low in cheese of sheep’s milk. Cow’s milk contained highest of Glutamic acid, Proline and Tyrosine, while it contained lowest of Alanine. Shrimp contained highest of Aspartic acid and Glycine, but fish surpassed in Alanine, but sheep’s meat contained the highest of Arginine. Glycine, Arginine, Proline and Tyrosine were found in lowest percentage in eggs, while cow’s milk has the lowest portion of Glutamic acid. Also, chicken contained lowest percentage of Aspartic acid. Fish contained highest percentage of Serine, while cow’s milk contained highest of Histadine. But cow’s meat contained low amounts of Serine and Histadine. Methionine, Leucine, Phenylalanine, Glutamic acid, Arginine, Alanine, Tyrosine and Histadine in mushroom was close to sheep’s meat as well as close to shrimp in the percentage of Methionine, Valine, Glycine and Proline. Also, the percentage of Lysine was close with it in cow’s milk, Aspartic acid in mushroom was close to the percentage of it in cheese of sheep’s milk, while Serine was close with it in chicken and cheese of cow’s milk.
The Role of inoculation with Rhizobium leguminosarum in properties of plant (Vicia faba) under different levels of salinity
Authors: Al-Karhi M A J , Ismail W M , Hussein M N
Published: December 2019

An experiment was conducted to study the role of inoculation with Rhizobium leguminosarum and soil salinity levels (4, 6, 8 or dsm−1). Their interrelationship with the chlorophyll content and the weight and number of root nodes of the Vicia Faba L. plant. Rhizobium leguminosarum bacteria were isolated from soil grown in the previous season with Rhizobium with salts 4, Rhizobium with salts 6, Rhizobium with salts 8, and Without fertilization. The experiment results showed that the isolates were superior to the rhizobia isolates, it showed also that RS1 isolates were superior to RS2 and RS3 in most studied traits, with the highest rate of root nodules (22.33 node. Plant−1) and the dry weight of root nodules (157.53 mg.plant−1) salinity levels were significantly higher than the lowest level of S1 salinity. The results showed that the levels of 4dsm−1 at high levels (6 and 8 ds.m−1) were higher than those of chlorophyll content, number of root nodes, The chlorophyll content (20.32 mg.gm−1 fresh weight), While the number of root nodules and the dry weight of the root nodule (22.50 nodules.Plant−1 and 159.06 mg.plant−1). The interaction between Rhizobium leguminosarum and 4ds.m−1 salinity was higher in all studied traits. Interference between isolation R and S1 was highest in dry weight of root nodule, number of root nodules and chlorophyll content (184.30 mg.plant−1, 27.00 node. Plant−1, 22.15 mg.gm−1) respectively.
Using GIS towards soil mapping of Latifia project/Baghdad, Iraq
Authors: AL Mashhadani H A , AL-Mosawi N A E
Published: December 2019

A cartographic analysis of the Latifiya area project map was carried out using GIS for an estimated total area of 48001.94 ha, whose coordinates are between 32, 99 90233 60388 north, 44 37219, 44 34 056 east, where a picture of the map was taken by the scanner. The results of the analysis have shown that the highest frequent soil series was DM87 series, with the largest area of 10142.58 ha, with an area of 22.46% and a frequency of 55, while the series MW9 has the smallest area that reached 924.60 hectares with an area of 2.04% at8 appearance Aruqub area reached 6419.89 hectares by 14.21% area of the totalarea, as well as have been identified or soil association units and reached number7 Repetition Soil units associated by a series of DM87 the largest area where the units associated to DW56,DW85, DW33, DW3.
Morphology of temperature field of heat pipe in conditions of photon
Authors: Karachinov V , Petrov D , Evstigneev D
Published: December 2019

Within the framework of computer experiment with the use of finite element method the technique of visualization of nonstationary temperature field morphology in the design of heat pipe having a symmetrical structure in the presence of localized heat flow source of a certain shape is developed. The features of the structure of isothermal surfaces and lines are visualized and investigated for the uniform starting mode model in the range of power values of the heat flux source induced by photon heating P = 0 ÷ 5W on both sides of the center of the pipe.
Mechanical properties of weld joints of TiNi alloy wire used in force elements
Authors: Khlopkov E A , Kurushkin D V , Ostropiko E S , Khanaev V M , Sapozhkov S B , Vyunenko Yu N
Published: December 2019

The paper presents data on the mechanical testing of argon-arc weld joints of the TiNi 55.42 % wt. wires diameter of 2 mm. The mathematical modeling results of the temperature fields evolution of the weld zone during cooling are given.
Impact of thermocycling type on nature of changing reversible deformations in titanium nickelide
Authors: Kryuchkov S V , Bogdanov N P , Malinin V G , Savich V L , Konovalov M N
Published: December 2019

For cyclic functioning of mechanisms for various functional purposes based on materials with a shape memory effect (SME), it is necessary to possess skills of forming the characteristics of a cyclic shape memory, i.e. the shape memory effect implemented upon heating and plasticity of direct transformation observed upon cooling of the material under load. For this purpose, a systematic experimental research of the impact of a type (mode) of thermocycling of samples of titanium nickelide under torsion on the nature of changing reversible deformations in the process of thermocycling was performed. To assess quantitatively the effectiveness of a thermocycle, the value of a thermocycle completeness coefficient was introduced which is determined as the ratio of the value of the deformation restored for a cycle to the value of the deformation accumulated for a thermocycle. Three modes of loading were studied.

1. The material was loaded in a martensitic state to a certain level, then it was heated through the interval of a reverse martensitic transformation, in the austenitic state it was unloaded and cooled to its original state.

2. The material was loaded in a martensitic state, then heated through the interval of a reverse martensitic transformation to an austenitic state and cooled to its original state.

3. The material loaded in a martensitic state was unloaded. Then it was heated through the interval of a reverse martensitic deformation to an austenitic state in a free state, where it was loaded and the loaded material was cooled to a martensitic state. For all thermomechanical modes of loading upon heating, the value of the deformation restored and accumulated upon cooling was defined experimentally.

It has been experimentally found that the highest value of the restored deformation is implemented in the third loading mode, and the lowest one – in the first one. The intermediate deformation is implemented in the second mode.

The highest value of the deformation determined by the effect of the direct transformation plasticity takes place in the third mode.
Vibration stability criterion in assessing the dynamic quality and limiting capabilities of machine tools
Authors: Shvetsov I V , Vasilkov D V , Tarikov I Ya
Published: December 2019

The vibration resistance of the dynamic system of a cutting machine is considered as a criterion for assessing its dynamic quality and limiting capabilities. An example of diagnosing a group of machines of the same type by the criterion of vibration resistance with an assessment of their current state is given.
Resonance magnetoelectric characteristics of Terfenol-D/Pb(Zr0.52Ti0.48)O3/Ni asymmetric three layered composites
Authors: Liu Ying , Yang Chao , Zhou Peng , Srinivasan Gopalan , Qi Yajun , Liang Kun , Zhang Tianjin , Filippov D A
Published: December 2019

Three resonance modes, a first-order bending resonance mode and nonlinear and first-order longitudinal resonance modes, were observed in Terfenol-D/lead zirconate titanate(PZT)/Ni asymmetric magnetoelectric(ME) laminated composites. The ME outputs and resonance modes were tuned by the ratio of the thickness of the Ni negative magnetostrictive layer to the Terfenol-D positive magnetostrictive layer that of the(t
Ni/t
T). As (t
Ni/t
T) increased from 0.4 to 2.0, the strength of the first-order longitudinal resonance mode was decreased, while the first-order bending resonance was enhanced. The asymmetric threelayered composites exhibited a large ME coefficient of 250mV/(cm Oe) under a bias magnetic field of 400 Oe at quasi-static frequency (1 kHz). This work sheds some light on the design of ME composites with tunable ME resonance modes and multifrequency operation.
Performance Improvement and Parameter Influence of Thread Shaft by Axial Self-infeed Rolling Process
Authors: Zhang Shuowen , Fan Shuqin , Zhao Shengdun , Wang Yongfei
Published: December 2019

The rolling process is an important processing technology for improving the performances of thread shaft. In this paper, the axial self-infeed rolling process is investigated. The principle of the axial self-infeed rolling process is introduced and the performances of the formed thread shaft with copper T2 are evaluated. In addition, the major diameter of the formed thread shaft and the rolling torque during the axial self-infeed rolling process are studied. The hardness of the formed thread shaft with copper T2 is improved 74.2% and the microstructure is fibrous tissue in the bottom of the tooth groove. The size of the blank has greater impact on the major diameter and the forming torque than the rotating speed of the blank.
A Portable Fluorescent Microfluidic Detection Device Based on FPGA
Authors: Wu Gangshan , Chen Chiyuan , Yang Ning , Xu Peifeng
Published: December 2019

Fluorescence analysis method has high sensitivity, but the difference between photoelectric converters will lead to inaccurate data. To solve the problem of the separation of effective and unwanted light in the process of fluorescence conversion and the noise of small-scale variable amplification. This paper designs a method of modulating the light source makes the fluorescent light be a kind of differential signal that is easily extracted by the photoelectric conversion circuit and amplified, and then uses digital devices FPGA and ADC to achieve signal acquisition and processing, and finally it is presented in the form of a dark room box. In this paper, a novel detection structure is used as a discussion point, and a low-power, high-precision, low-cost signal processing system has been introduced in detail, and mainly used in 500 The fluorescence in the wavelength range of -600 nm was tested. The mathematical relationship between different fluorescence intensities and the post-conversion variables was established. In the subsequent product development, the detection of different wavelengths of light can be achieved by replacing the excitation light source and the corresponding filter, providing a simple circuit processing method for designing photoelectric probes, biomedical detection, and chemical applications.
Analysis of Turbine Rotor Fault Diagnosis Method
Authors: Shi Zhibiao , Dong Wenzhuo
Published: December 2019

The role of steam turbine in generating set is very important. During the operation, the rotor state is monitored by high-frequency vibration sensor. With the rapid development of computer, sensor and communication technology, modern machinery and equipment is developing towards the direction of electromechanical integration, as a result of the monitoring equipment group of large scale and the required point, single point more high sampling frequency and data collection time span is long, so the monitoring data of exponential growth, mechanical equipment health monitoring field enter the era of “big data”. The traditional method of turbine rotor fault diagnosis has encountered some difficult technical problems and bottlenecks. This paper first introduces the fault mechanism of turbine rotor. Then, the fault diagnosis methods of turbine rotor proposed by many scholars this year are analyzed, the fault characteristics of turbine rotor are summarized and the challenges are discussed, and the direction of further research is prospected.
Research on Applicability of Fiber Bragg Grating Sensor for Ship Structure Monitoring System
Authors: Tang Haoyun , Ren Huilong , Jia Lianhui
Published: December 2019

A complete application research of Fiber Bragg Grating sensing technology in ship structure stress monitoring and evaluation system is studied in this paper. The working principles of Fiber Bragg Grating strain sensor in monitoring system are briefly introduced. And a kind of new differential FBG strain sensor for ship structure stress monitoring is applied and verified by a series of calibration and force measurement test systematically. Through finite element calculation and test towards ship structure, some defects of monitoring sensor used in bending deformation are found. Then, a three-dimensional strain sensor arrangement for stress monitoring of hull structure is designed and developed. The satisfactory test results are obtained by this sensor arrangement. Finally, the accuracy and reliability of hull structure monitoring system is improved further through this research results.
Surfactant-Free Electrodeposition of Ag Dendrites as Photocatalyst for Methylene Blue Degradation
Authors: Dhanasmoro Lintang , Budi Setia
Published: December 2019

Ag dendrites have successfully fabricated through square-wave electrodeposition method. The electrochemical properties of Ag dendrites were examined via electrochemical impedance spectroscopy and cyclic voltammetry techniques in a solution containing 0.5 M KCl. It was found that Ag dendrites demonstrated equivalent series and charge transfer resistance of 91.3 Ω and 473.7 Ω, respectively. The highest specific capacitance value of Ag dendrites obtained 0.98 F/g at scan rate 10 mV/s. The recorded photocatalytic activities towards methylene blue (MB) degradation under UV light irradiation showed that photocatalytic performance of Ag dendrites reaches approximately 41.88%.
Calculation and experimental research of liquid flow through a radiator of the electric car power battery thermal managment system
Authors: Meshkov A.M. , Barinov A.A. , Sizov A.Y. , Skrebneva T.G. , Korotunova I.A.
Published: December 2019

The article presents current state of the development of the thermostatic control system for electric vehicle traction batteries. The results of calculation and experimental research of the fluid flow through the radiator of the electric car power battery thermal managment system are described. Based on the data obtained, a pressure-flow characteristic of the radiator is constructed.
Unmanned Vehicle LIDAR-camera Sensor Fusion Technology
Authors: Kuzin V.D. , Pronin P.I. , Zarubin D.N. , Shashkina K.M.
Published: December 2019

With the growth of computing power and the development of information technology in the last few years, the tendency for the development of unmanned vehicles has increased. Many leading corporations sponsor this industry. Since the creation of the concept of an unmanned vehicle implies that the computing systems in its composition must make decisions about the method and direction of its further movement, predict the further actions of the traffic participants and move in accordance with the rules of the road, these vehicles are equipped with powerful telemetry systems that allow to accurately evaluate surroundings. But, since there is a problem in incomplete data from one device (sensor), in this article, using a specific example, sensor fusion technology is considered that allows combining data from several sensors to achieve maximum results in solving problems of developing an unmanned vehicle.
Monitoring systems development using situational approach and fuzzy logic
Authors: Ermilov A.E.
Published: December 2019

The article describes trends of the designing modern monitoring systems: scenario and contingent approaches. The authors propose to use the frame model to represent operation the systems. The frame model supports the using of fuzzy logic.
Designed brake system reliability assessment techniques application on the basis of the real one
Authors: Yusupov R.R. , Alexeev A.V. , Yarzhemsky A.D. , Chichkina M.I. , Berdnikov L.A.
Published: December 2019

The paper analyses and assesses the reliability of the designed brake system on the basis of the real one. Analysis of the basic diagram and the components’ eventual failures was made. Based on the built structural diagram of the brake system the reliability level was estimated. Measures to increase the system reliability were proposed.
Bearing floatation of forest machines (theoretical calculation)
Authors: Khitrov E G , Andronov A V
Published: December 2019

The purpose of the article is to summarize the calculation procedure and calculate the forest machines floatation depending on the type of mover and soil conditions. Research methods are analysis of literary sources, numerical methods of applied mathematics during calculations and calculated data approximation. Formulas and the procedure for calculating the track depth, the coefficients of resistance to movement, adhesion and traction of the forest machines movers are given. In the compiled mathematical model, slipping is not an input parameter; its value is determined by calculation comparing the resistance forces to movement and the mover adhesion to the bearing surface. According to the calculations results, it was found that forestry machines with a caterpillar mover have greater cross-country ability compared to wheeled vehicles. On weak and moderate soils, the bearing floatation loss of tracked vehicles due to insufficient mover adhesion to the bearing surface does not occur. A factor limiting the pressure of the caterpillar mover on the bearing surface should be recognized as the track depth, since at a pressure of more than 0.04 MPa, the track depth exceeds the machine clearance. To ensure the bearing floatation of wheeled vehicles on weak soils, the pressure of the wheeled mover should be limited to 0.6 MPa. To ensure the bearing floatation of wheeled vehicles on moderate soils, the pressure of the wheeled mover should be limited to 0.95 MPa.
Neural networks modification for solving the traffic signs detection problem
Authors: Devyatkin A.V. , Filatov D. M.
Published: December 2019

The paper deals with the implementation of the traffic signs detection model on the deep neural network basis. The complexity of the problem lies in the detected objects size. The paper considers the use of modern approaches to the deep neural networks Mobile Net v2 and Tiny YOLO v3 implementation to solve the detection problem in real time. Also, a modification of the considered networks is proposed, which allows increasing the Average Precision index by more than 20%. For the networks training GPGPU NVIDIA 1080 and a signs images set called Russian traffic sign images dataset - RTSD which includes more than 15,000 frames for training and more than 3,000 frames for carrying out testing were used.
Development of design project of mini cross-country vehicle KORSAK
Authors: Kapustin A.G. , Papunin A.V. , Makarov V.S. , Belyakov V.V. , Gnenik M.E.
Published: December 2019

This article reviews different design options for small-size cross-country vehicle KORSAK. That includes 5 options of the vehicle exterior design and the final version, 5 options of the vehicle interior design, 2 options of seats arrangement and the final approved option of the vehicle chassis. The vehicle model made to scale 1:10 is shown in the picture.
Evaluation of medium factor influence on car materials fatigue resistance
Authors: Goncharova D.A. , Pachurin G.V. , Filippov A.A. , Trunova I.G.
Published: December 2019

Parts and components of a car are subjected to various types of operational loads, causing the construction materials destruction. are vibration loads in corrosive environment are the most dangerous ones, they can increase the probability of road accidents.

The article considers the influence of corrosive medium on the patterns of fatigue resistance of automotive structural steels. The factors affecting the resistance to fatigue failure have been detected.

Corrosive medium makes it difficult to determine the moment of macrocrack onset and estimate the pre-onset period. However, using the curves of changes in the current deflection under sample cyclic loading, one can set down the moment of crack onset and determine its growth rate.

This allows us to justify the choice of materials for car parts and elements at the design stage, extend its life-span, reduce car and processing techniques material consumption, taking into account its service conditions.
On Comparing Radar Performance and Conducting Their Assessment Tests
Authors: Myakinkov A. V. , Fadeev R. S. , Burov V. N. , Yarjemsky A.D. , Rogov P. S. , Trusov Y. P. , Toropov E.I. , Moshkov P. S. , Kolesnitcenko D.A.
Published: December 2019

The present article deals with the initial stage of integration of the automatic emergency braking system to the vehicle. The analysis of directives and regulations demands is carried out. The methodology of comparative testing of automobile radars as a part of a vehicle is clearly shown. Basing on the test results, the authors tried to estimate the influence of environmental elements of an automotive radar installed in a car on basic radar characteristics for detecting targets. Further actions are suggested to evaluate the performance of car radars necessary for rational selection of the model itself and the manufacturer of this sensor, which would be important for subsequent development and integration of automatic braking systems and adaptive cruise control.
Oxide semiconductor thin-film transistors with nano-splitting and field-surrounding channels fabricated by subwavelength photolithography
Authors: Huang Kairong , Hu Sujuan , Wu Jin , Liu Chuan
Published: December 2019

Oxide semiconductors feature high tunability of carrier concentrations under the control of electric field. In thin film transistors (TFTs), applying dual gate has been reported to be efficient in enhancing the coupling between the gate field and the channel accumulation. In this work, we demonstrate nano-splitting and field-surrounding semiconducting channels (based on InGaZnO) in TFTs, which is fabricated by facile subwavelength photolithography. In such TFTs, semiconducting channels have 200 nm gaps parallel to the drain field, are wrapped by oxide insulators and thus the gate field. The devices show enhanced performance as compared with dual-gate and single gate TFTs, exhibiting higher drain current and steeper subthreshold swing. The maximum transconductance g
m is 27.9% higher than dual gate TFT and 73.1% higher than single gate TFT. According to device simulation, the improvement of the wrapping insulators device correlates with the three-dimensional accumulation of carriers and increased gate electric field near the semiconductor-dielectric interface. These surrounded-channel effects become noticeable in the device with the gap distance less than 1 μm, with gate electric field squeezing in the submicron gaps. The proposed approach offers an alternative way to take advantage of the oxide semiconductors and their application in TFTs with related circuits.
The Beneficial Effects of Computer-Based Cognitive Training in Parkinson’s Disease: A Systematic Review
Authors: Nousia Anastasia , Martzoukou Maria , Tsouris Zisis , Siokas Vasileios , Aloizou Athina-Maria , Liampas Ioannis , Nasios Grigorios , Dardiotis Efthimios
Published: December 2019

Background

Cognitive dysfunction is one of the most prevalent non-motor aspects of Parkinson’s disease (PD). The present review focuses on published studies investigating the effect of computer-based cognitive training (CT) on neuropsychological performance in PD.

Methods

A systematic search of the PubMed database and Google Scholar was carried out. Randomized controlled studies published before September 2019, investigating the effect of computer-based CT (regardless of the comparator, active or placebo) on PD patients were included. Literature search, data extraction, and Risk of Bias (RoB) evaluation (based on the RoB Cochrane tool for Randomized Trials) were performed by two authors (A.N. and M.M), independently.

Results

Among 30 full-texts assessed for eligibility, seven articles fulfilled the inclusion criteria and were involved in the qualitative analysis. The main outcomes of the retrieved studies (all studies used similar cognitive rehabilitation methodologies) were indicative of cognitive improvement in most cognitive domains, particularly memory, executive function, processing speed, and attention, that is, the domains primarily impaired in the disease.

Conclusion

Multidomain CT, which is exclusively based on computer software, leads to measurable improvements in most cognitive domains affected in patients with PD. The present review is the first to include studies assessing the effect of computer-based CT techniques without deploying CT with paper-pencil techniques. Limitations originate mainly due to the heterogeneity among included studies (differences in CT softwares, PD stages, number, and duration of training sessions.
PgRC: pseudogenome-based read compressor
Authors: Kowalski Tomasz M , Grabowski Szymon
Published: December 2019

Motivation

The amount of sequencing data from high-throughput sequencing technologies grows at a pace exceeding the one predicted by Moore’s law. One of the basic requirements is to efficiently store and transmit such huge collections of data. Despite significant interest in designing FASTQ compressors, they are still imperfect in terms of compression ratio or decompression resources.

Results

We present Pseudogenome-based Read Compressor (PgRC), an in-memory algorithm for compressing the DNA stream, based on the idea of building an approximation of the shortest common superstring over high-quality reads. Experiments show that PgRC wins in compression ratio over its main competitors, SPRING and Minicom, by up to 15 and 20% on average, respectively, while being comparably fast in decompression.

Availability and implementation

PgRC can be downloaded from https://github.com/kowallus/PgRC.

Supplementary information

Supplementary data are available at Bioinformatics online.