bluuebunny/crossref_metadata_2025_split huggingface dataset:
Role of polarization electric field on thermal conductivity of GaN/In0.9Ga0.1N/GaN superlattices
Authors: Sahu Subhranshu Sekhar , Sahoo Bijay Kumar 
Published: May 2020

Abstract
Enhancement in thermoelectric efficiency of GaN/In0.9Ga0.1N/GaN superlattice (SL) needs higher electrical conductivity (σ) and Seebeck coefficient (S); but lower thermal conductivity (k). Both S and σ are improved due to the presence of polarization electric field (PEF) of this SL. In this work, the role of PEF on k of SL has been investigated and found that cross-plane and in-plane k are reduced due to PEF upto a certain temperature. Both cross-plane and in-plane thermal conductivities in the presence of PEF show cross over temperature termed as transition temperature(Tc
). It is noted the Tc
for cross-plane and in-plane thermal conductivity of GaN/In0.9Ga0.1N superlattice (SL) are 510K and 530K, respectively which depends on In contents. Thus, the preferred value of S, σ and k of GaN/In0.9Ga0.1N SL can be achieved as per requirement by changing In content; making it suitable for TE module for maximum power production at room temperature and above.
Single Photon vs Two Photon Excitation of Silver Nanocluster
Authors: Tripathy J. , Lu Y-H , Islam Md. S. , Dickson R. M. 
Published: May 2020

Abstract
Silver nanodots, nanoparticles and nanoclusters have been of immense interest to researchers for some time now. A lot has been published in this field from synthesis to optical properties of various types of silver nanoclusters. In this work we explore the impact of polarized excitation on modulatability and fluorescence enhancement of silver (Ag) nanocluster. Ag nanoclusters as previously reported are enhancible and modulatable, however, for pathological application purposes emission in NIR even IR is desirable, so that the fluorescence signal detection over the auto-fluorescence background signal in vivo mode becomes easier. In a preliminary work we have seen a rise in anisotropic values beyond the maximum steady state anisotropy of 0.4 when the sample is excited using two colored laser light. Though there are numerous multi-photon study results available in literature, this is first of its kind where we use two polarized excitations to sequentially probe the excitable dark state of the cluster and the emission is then analyzed to obtain a value of steady state anisotropy along with changes observed in signal enhancement owing to modulation of the secondary excitation source. Ag nanocluster samples encapsulated by 10- or 12-mer ss-DNA capable of producing red to NIR light upon excitation at shorter wavelengths were prepared in-house.
A Novel Method for the Removal of Uranium by Using Carboxyl Functionalized Graphene Oxide
Authors: Patel Khilawan , Devi Rama , Dewangan Pradeep Kumar , Vinayak  , Sutar Alekha Kumar , Maharana Tungabidya 
Published: May 2020

Abstract
Graphene oxide (GO) and functionalized carboxylic graphene oxide (COOH-GO) were successfully synthesized by modified Hummer’s technique. The prepared GO and COOH-GO was characterized successfully by UV-Visible Spectroscopy, Fourier transforms infrared spectroscopy (FTIR), X-ray diffraction, Raman spectroscopy, Scanning electron microscopy (SEM)& Zeta potential. The removal of U(VI) heavy metal comparative study was done by using Graphite, GO & COOH-GO and the removal were confirmed by using LED fluorimeter. The effect of pH of medium, contact time, adsorbent dose, initial concentration of U(VI) were examined for the removal of U(VI). The extent of U(VI) removal has been found to be in the order of COOH-GO >GO> graphite. The U(VI) removal maximum efficiency was observed ~96% observed at pH 4.5. The higher removal efficiency is attributed to the higher negative surface charge of COOH-GO (zeta potential:-39.9 mV) in comparison to zeta potential of GO (-28.9 mV) &graphite (-21.6 mV).
Quantum Hall Effect in Trilayer Graphene
Authors: Brahma J , Sahoo S 
Published: May 2020

Abstract
Graphene is a two-dimensional sheet of carbon atoms with properties that are superior to other materials. Due to these superior properties, a lot of research is being done with this material. One of those properties is the Quantum Hall Effect (QHE). Monolayer graphene shows very interesting behaviour in the presence of a high magneticfield (up to 30T) and at very low temperature (~0.2K). Its unconventional Landau Level (LL) spectrum of massless Diracfermions leads to a new type of quantum Hall effect, known as half-integer quantum Hall effect or anomalous QHE. We expect uniqueresults can also be seen in trilayer graphene (TLG).In this work, we study the integer quantum Hall effect in trilayer graphene theoretically.
Models for the determination of basic parameters of tracked feller buncher machines
Authors: Andronov A V , Taradin G S , Zverev I A 
Published: May 2020

Abstract
Models for the determination of basic parameters of tracked feller bunchers are presented. A statistical analysis has been carried out and the normal law of distribution of the main technical characteristics of the most common models of machinery has been established. Both univariate and multivariate regression equations of the main parameters of the machines have been obtained, depending on the main parameter characterizing the load transmitted from the object of labour, which is cut and packaged by the machine - load capacity.
Physical and mechanical properties of forest soils: a review
Authors: Bazarov S M , Alexsandrov V A , Belenky Y I , Gasimov G S , Kalistratov A V 
Published: May 2020

Abstract
The purpose of our article is to analyze literary sources and supplement classification of soils with missing information that simplifies implementation of mathematical models of the interaction of movers of forest machines with soils. Our research methods include analysis, compilation and systematization of reference and experimental data, and approximation of calculated data. The classification of forest soils by strength categories has been clarified, based on the identification of the characteristic combinations of the physical and mechanical properties of soils — the general deformation modulus, specific adhesion, internal friction angle, specific gravity, and the thickness of the deformed layer. As a result of the analysis of literary sources and calculations, the classification of forest soils has been supplemented with missing information that simplifies the implementation of mathematical models of the interaction of the movers of forest machines with soils. An updated version of the classification includes data on the rheological properties of the soil, the shear modulus, bearing capacity, and the cone index of the soil. Based on the information obtained, linear relationships have been developed that reveal the interconnections of the physical and mechanical properties of soils.
System analysis of forest harvesting logistics
Authors: Bazarov S M , Alexsandrov V A , Belenky Y I , Gasimov G S , Soloviev A N 
Published: May 2020

Abstract
From the general position of logistics, forest harvesting technological complexes are multi-factor logistic flows formed by target operations of a complex production process. System analysis is included in forest harvesting logistics by constructing the functional time of the integrated connectivity of the operations performed. Minimum time of storage operations and maximum synchronization of operations in functional time are necessary conditions for optimizing logging production technologies.
Management of transport and logistic infrastructure of the territory: methodological tools and their improvement
Authors: Bezrukova T L , Tereshkina T R , Nesterov S Y , Kuksova I V , Pecherskaya O A 
Published: May 2020

Abstract
This article discusses the main problems of transport and logistics infrastructure management, which consist in the absence of one criterion for assessing the effectiveness of its operation, in the presence of institutional barriers for the development of transport and logistics complexes of territories, in the need for a new scheme and management system due to changing economic conditions dictated by globalization. The priority directions for the development of constituent entity of the Russian Federation - Voronezh region - are presented. Voronezh region has an advantageous geographical position and important transport corridors pass through its territory. A multi-level mathematical model has been built by its example for projects of regional transport infrastructure development, given by the initial conditions using multi-criteria optimization of the regional transport system that solves the problem in a dual formulation, based on a hypergraph superimposed on spatial planning scheme of this area.
Industrial approbation of temporary road structures for transport-assisted exploitation of forests
Authors: Borozna A A , Skachek D A , Naskovets M T , Mokhov S P , Golyakevich S A 
Published: May 2020

Abstract
The article discusses topical issues for the forest industry of the Russian Federation and the Republic of Belarus in the field of construction of automobile forest roads in difficult soil and hydrological conditions with low bearing capacity of soils and lack of road-building materials. To solve this problem, the authors of the article proposed road structures with the use of geotextile fabric, which could save up to 30% of road-building materials without reducing the strength characteristics of the structure. Recommendations have been developed for the construction of roads using geotectile fabric based on the results of pilot testing in industrial conditions.
Permissible ground pressure of wheeled forestry vehicles depending on the ground conditions
Authors: Grigorev G V , Dmitrieva I N , Kotenev E V 
Published: May 2020

Abstract
The aim of the work is to investigate interrelations between wheeled vehicle pressure on the ground and its cross-country ability. To comply with the requirement of ecological compatibility of the mover, which is that the rut depth after the passage of the vehicle should be less than 0.1 m, the pressure of the wheeled mover when working on moderate forest soils should not exceed 0.07 MPa (a forwarder 8x8 with a loaded weight up to 31 tons), on weak forest soils the pressure should not exceed 0.025 MPa (a forwarder 8x8 with a loaded weight up to 11 tons). On moderate soil to ensure cross-country ability, the pressure should be limited to 0.095 MPa (a forwarder 8x8 with a loaded weight up to 42 tons) (slipping ratio reaches 0.2, the depth of the rut is 0.18 m, the operating speed of the machine 1.5 m/s). To ensure the wheeled vehicle cross-country ability, the average pressure when working on weak forest soils should be limited to 0.04 MPa (a forwarder 8x8 with its loaded weight of up to 18 tons) (slipping coefficient reaches 0.136, rut depth of 0.253 m, the operating speed of the machine 2.8 m/s).
Problems of technological processes selection in logging
Authors: Kalyashov V , Smirnova A , Tjurin N , Gromskaya L , Antonova T 
Published: May 2020

Abstract
The article deals with current issues of the logging enterprises effective functioning with assortment technology for wood harvesting in the Leningrad region of the North-West Federal District of Russia. A survey of the production activity of a number of enterprises that use logging technology based on harvesters and forwarders was carried out. The results of technical and economic assessment of this technology usage are presented, the reasons of the decrease in the efficiency of the technological process of the logging are identified, the alternative assortment technologies are considered, and recommendations on selection of technological processes and systems of logging machines are made.
Deviation of resulting load of forestry vehicle from the normal to the bearing surface
Authors: Khitrov E G , Iliushenko D A , Kalistratov A V 
Published: May 2020

Abstract
The purpose of the article is to develop and analyze relationships for calculating the ratio of the normal pressure of forestry vehicle on the bearing surface and the shear stress caused by the vehicle’s slipping. The study bases on provisions of off-the-road locomotion theory and soil mechanics. The study uses methods of mathematical analysis and applied mathematics for calculations and numeric data processing. The calculations were performed using Maple 2017 software. Calculations show that the ratio of shear stress caused by slipping of the vehicle to the normal pressure on strong forest soil is an average of 17%, reaching 22%; on bearing soil, the ratio averages 22%, reaching 25%; on a weaker forest soil, the ratio is on average 24%, reaching 29% when cutting of the soil layers occurs. It is established that the deviation of the resulting vehicle load from the normal to the bearing surface, at which the cut of the soil layers begins, is 12 - 16 °. The deviation of the resulting load caused by the vehicle slip results in a decrease in the bearing capacity of forest soil by 8.5-10.5%.
Assessment of infrastructure of forest land
Authors: Kovyazin V , Romanchikov A , Kitcenko A 
Published: May 2020

Abstract
The article discusses the main directions of forest policy in the field of creating forest fund infrastructure, provides foreign experience in accounting for infrastructure and comparative indicators. An analysis of the transport infrastructure of the forest fund was carried out, as well as a methodology for assessing the infrastructure. Based on the data obtained, conclusions are drawn and ways to solve the existing problems in the forest sector are proposed.
The forecast of forestry tractor speed with mechanical transmission
Authors: Mikhailov O , Taradin G , Taraban M , Cozmin S 
Published: May 2020

Abstract
One of the most energy-intensive logging processes is skidding of trees. The correct choice of engine and transmission system parameters significantly affects the efficiency of forest machine use. The article suggests the method of determining the optimal range for mechanical transmission of skidders, which are widely used in skidding of log the logging area to the upper warehouse. This technique allows considering properties of fiber (rolling resistance, drag part of the forest pack and the slope of the fiber), truckload and parameters of the motor installation. It should be also noted that the coefficient of adaptability of the diesel engine (the coefficient of engine torque loading) and the engine loaded at crankshaft speed are taken into account. Results of experimental researches that have shown good convergence with theoretical calculations are presented.
Finding an effective technological chain of logging operations
Authors: Mokhirev A , Rukomojnikov K , Gerasimova M , Medvedev S 
Published: May 2020

Abstract
The choice of technological process’ parameters certainly affects the result of its implementation. When performing logging operations, there are many options for their sequence, the use of machines at different stages of performance and periods of the year. Choosing the technological chain, enterprise management is faced with various possible solutions. In most cases, they are taken speculatively - based on personal experience. The given study is a continuation of the group of authors work on the complex problem of algorithmization and optimization of logging operations, taking into account the analysis of various moving and processing operations of wood resources. In previous publications, the authors presented a graphic-analytical model for solving the task. This article presents a description of the algorithm developed on the basis of the presented mathematical and graphic-analytical models for finding an effective technological chain of transport, loading and unloading and processing operations of the logging process in dynamic natural production conditions. The algorithm was successfully tested on the example of data as close as possible to the conditions of the Krasnoyarsk territory.
E-procurement in developing the outsourcing of transport services
Authors: Nikolaeva A , Ivshin S 
Published: May 2020

Abstract
The article deals with the development of information technologies in the field of electronic procurement, which are an efficient logistics tool. Modern Internet technologies make it possible to gain competitive advantage in the implementation of business processes through taking the best decision when choosing alternative options related to the outsourcing of transport services. Global trends, which are aimed at digitalising logistics activities, are adapted and applied to the realities of the Russian economy. In the course of the study a comparative analysis of electronic trading platforms of the Russian Federation was carried out and their major characteristics were outlined. The paper touches upon the advantages of logistics outsourcing. One of the major players of e-commerce services in the Russian market was taken as an example to conduct a research covering the issues of e-procurement of transport services.
The method of using the harvester for logging in cutting areas with soft terrain
Authors: Rukomojnikov K 
Published: May 2020

Abstract
Article materials relate to the forest industry and can be used in logging operations on cutting sites with soft terrain. The result of the research is a developed technological scheme for the movement of the harvester and forwarder in the cutting area It allows you to reduce the number of skidding trails for moving the forwarder on logging sites with soft terrain, which are able to provide a one-time movement of a harvester, but require additional costs for strengthening of skidding trails for multiple movements of a forwarder. The forwarder works only on skidding trails that are located at distances from each other equal to ten distances of movement of harvester manipulator. This helps to reduce the cost of transport operations on cutting areas with soft terrain. The proposed technology can be used for clear cutting in cutting areas with soft terrain.
International projects experience for the development of interaction between education and logistics business in forest sector
Authors: Tereshkina T , Tereshchenko S 
Published: May 2020

Abstract
This article will analyze the impact of international projects on cooperation between business and universities. Multifaceted aspects of interaction between universities and logistics business in the forest sector are considered, the influence of this interaction on the quality of the educational process is determined. The main forms of cooperation of organizations of the forest sector with Russian higher educational institutions engaged in training in the field of logistics and supply chain management are identified. It will be shown that international projects that create new networks between universities and business in the forest sector increase the effectiveness of such cooperation and create new forms of cooperation. The experience of implementation of international projects in Russian universities is analysed and the possibilities of its use for the development of interaction between business and education are determined. The results of an empirical study of cooperation between educational institutions and organizations of the forest sector are presented. Conclusions are drawn about the impact of international projects on the intensity and effectiveness of interaction between higher education institutions and enterprises of the forest sector, which ensures the growth of professionalism of teachers, competence of students and focus on the real needs of the labor market.
Logistic approach to a company’s performance assessment based on a KPI system
Authors: Voronova D , Berezhnaya L 
Published: May 2020

Abstract
The aim of the article is to develop guidelines for the use of the logistic approach to evaluation of a company’s performance based on the Key Performance Indicators (KPI) system. The literature review presents the results of scientific research of Russian and foreign scientists who actively use the KPI system to evaluate the logistic activities of companies. As part of the study, the concept of a logistic approach to evaluating a company’s activities based on KPIs is presented. The algorithm of development and implementation of the KPI system based on the logistic approach is presented and described. As the key performance indicators the following logistic criteria have been used: Right product, Right consumer, Right quantity, Right quality, Right place, Right time, Right costs, based on which the KPIs have been developed. In the end, conclusions have been drawn and further directions of research presented within the framework of this scientific topic.
The quality and mineral content of the community salt conventional in Kupang City and Kupang District East Nusa Tenggara Province
Authors: Dawa Umbu Paru Lowu , Gadi Dewi Setyowaty , Rosari Renya , Teffu Yunialdi Hapynes 
Published: May 2020

Abstract
The production of conventional salt produced by the community salt processing in the city of Kupang and Kupang district has quality at below the standards set. This study aims to analyze the quality of conventional salt and mineral contents. The sample is taken by random sampling method. Analysis of moisture content based on the AOAC method, NaCl content based on the method of wet dewatering and mineral content using Inductively Coupled Plasma Optical Emission Spectrophotometer (ICP OES). The quality of conventional salt is produced based on the criteria for the content of NaCl, water content and the content of Iodine is still below the Indonesian National Standard. The mineral content of magnesium, calcium and potassium is still in the range of Indonesian National Standard.
H2O2 as a fungicide in the growth phase of green Haematococcus pluvialis
Authors: Witono Judy Retti , Novianty Valine , Arry Miryanti Y I P , Kumalaputri Angela J , Santoso Herry 
Published: May 2020

Abstract
One of the potential sources for bioenergy and biochemical products is Haematococcus pluvialis. However, these microalgae are vulnerable to chytrid infection when the cells are transitioning from the green flagellates’ stage to the resting stage. As a result, the productivity of their biomass is low. The objective of this research was to evaluate the effects of hydrogen peroxide as the fungicide, including those which were combined with fluazinam, on the growth of H. pluvialis. The variables used in this research were the dose of H2O2, the combination with fluazinam, and the frequency of H2O2 treatment. The initial cell number of H. pluvialis was 5 × 104 cells/mL culture medium. The 5 different treatments were done, i.e., (1) 0.028 mL H2O2/L liquid culture dosed every day; (2) 0.028 mL H2O2/L liquid culture dosed every day for only 3 days and then every two days combined with single dose 0.5 ppm of fluazinam on the first day; (3) same as (2) but without combination with fluazinam; (4) 0.035 mL H2O2/L liquid culture dosed every day for 3 days then every two days combined with single dose 0.5 ppm of fluazinam on the first day; (5) same as (4) but without combination with fluazinam. As a comparison, there was also a culture without any treatment as a control. The culture which was treated with hydrogen peroxide 0.028 mL H2O2/L liquid culture dosed every day for only 3 days and then every two days at the 7th day showed the highest cell number (45 × 104 cells mL−1 ∼ 9 fold from the initial cell number), even compared to the culture without any treatment. In conclusion, the treatment with hydrogen peroxide is effective against chytrid infection. The combination with fluazinam does not affect more to the effectiveness of H2O2 as a fungicide. It looks that by adding fluazinam, the H. pluvial growth is depressed.