bluuebunny/crossref_metadata_2025 huggingface dataset:
The simulation of compliance of structural joints in the calculation of multi-story frame buildings
Authors: Malahova A N , Morozova D V
Published: January 2020

Multi-story frame buildings in precast concrete are one of the main types of buildings being built in the country. The article considers and analyzes the results of the numerical calculation of the structural system of a multi-story frame building, made using the LIRA-SAPR software package. It has been shown that with a semi-rigid assembly of the crossbars with columns it is necessary and possible to simulate the compliance of the joints. The ratio of bending moments in spans and on supports in the crossbars of the calculation scheme depends on the coefficient of compliance (rigidity) of the joints.

In its turn, the compliance of semi-rigid joints is a complex quantity, determined by the compliance of the structural elements of the joints, namely: the compliance of the embedded parts in the joined elements of the frame, the compliance of the connecting cover plate, the compliance of the welds for the connecting cover plate, as well as the compliance of the seam between the crossbar and a column filled with cement-sand mortar. An algorithm for determining the compliance of structural elements of a semi-rigid joint is given.
Interaction of a barrette with surrounding and underlying soil taking into account rheological property of soils
Authors: Ter-Martirosyan Z G , Huu Hung Dam
Published: January 2020

The article presents the formulation and solution to the problem: A barrette has interaction with the surrounding and underlying soils, taking into account their linear and rheological properties, under the influence of the force applied to the barrette head - which would be solved with the analytical method. As a computational geomechanical model, a soil column with limited dimensions of rectangular cross-section containing a barrette is considered. It was shown that the distribution of the force applied to the barrette is distributed between its side surfaces and its toe significantly not only depends on the ratio of the stiffness of the surrounding and underlying soils(G1/G3; G2/G3), but also the geometric parameters of the barrette and the soil column. According to the value of the force applied to the barrette head, the stress-strain state of the “barrette-surrounding and underlying soils” system, including settlement and barrette’s bearing capacity, is distributed between the side surfaces of the barrette and its toe. The papers result servers as a basic to calculate the barrette’s bearing capacity and to prognose stress field and deformation of the ground surrounding the barrette and under its toe in time.
An investigation to determine the bearing capacity of driven piles and pressed friction pile using practical method
Authors: Duong Le Thuy
Published: January 2020

This article considers the question of the necessity of soil porosity coefficient in determining the bearing capacity of vertically loaded driven and pressed pile (vertical load) by analytical method using the calculated values of soil resistance on the pile’s side surface and under its toe, defined by the tables of standard documents (practical method). Statistical analysis, based on the theory of planning experiments, shows that additional consideration of the soil porosity coefficient allows to increase the accuracy of calculation of pile bearing capacity, which is confirmed by the results of field tests of piles and cone penetration tests of soils. It is shown that, depending on the soil porosity coefficient, the bearing capacity of a vertically loaded pile can vary up to 2 times. To calculate the load-bearing capacity of driven and pressed piles by the analytical method based on the results of engineering and geological surveys taking into account the soil porosity coefficient, the method developed on the basis of Z. Sirojiddinov’s probabilistic-statistical processing of test results by vertical static load testing on a large number of piles in various soil conditions is recommended.
Data analysis in price police marketing research in construction
Authors: Grineva O , Shirochenskaya I
Published: January 2020

The article deals with the data analysis marketing approach to pricing in construction in the segment of luxury housing at the present stage. The authors consider three approaches to setting the price of luxury housing in construction, dwell on the marketing aspect of determining the price. The problem of perceived quality and its relation to price is described at length. The authors demonstrate that psychological pricing is one of the common approaches to price determination in this sector of construction industry. The article presents the results of survey aimed at young Russian consumers. The distinctive features of this segment and their requirements to justify the price are described in detail.
A comparative study of ordinary piles and superlong piles in consolidating soil
Authors: Znamenskii V V , Hegazy O M
Published: January 2020

This paper presents finite element analyses of negative skin friction on a short single pile, long pile and superlong pile under various conditions. Negative skin friction is a most common problem in designed and construction of pile in a highly compressible soft soil. In this paper, a 3D-dimensional axisymmetric model is built in the finite element program, ABAQUS6.14. The model first is verified with a centrifuge test results. The study concluded that the neutral plane is located closer to the end of the pile as the end bearing increases. Based on the analyses, it is found that the location of the neutral plane is significantly influenced by the pile tip location from bearing layer. the normalized neutral plane decreases with the increase of the pile length embedded in the clay layer. Closed form equations of Shong, 2002, predict the numerical results in well agreement.
Method of integration finite element analysis into the SHM systems
Authors: Korgin A V , Ermakov V A , Zeyd Kilani L Z
Published: January 2020

In this article, the authors propose a modernized SHM system, which involves the integration of finite element software into it. The block diagrams of interaction between the standard monitoring system and the modernized one are presented. The use of this scheme for oil tank monitoring is proposed, as well as comparisons of calculated and experimental studies are presented, which confirms the accuracy of calculations and the feasibility of using this scheme.
A modified penalty function method for treating multi freedom constraints in finite element analysis of frames
Authors: Quyen Vu Thi Bich , Tien Dao Ngoc , Dung Nguyen Nhu
Published: January 2020

In finite element analysis, treating boundary condition having multi freedom constraints is needed to produce modified system of equation based on master stiffness equation considering multi freedom constraint. Generally the operation of imposing multi freedom constraints can be developed using Master-Slave Elimination, Penalty Augmentation or Lagrange Multiplier Adjunction methods. The master-slave method is useful only for simple cases but exhibits serious shortcomings for treating arbitrary constraints. The Penalty Augmentation method and Lagrange Multiplier Adjunction are better in many applications. But there are not free of disadvantages. The penalty method has difficulty of choice of weight values that balance solution accuracy with the violation of constraint conditions. The multiplier method is sensitive to the degree of linear independence of the constraints, and the bordered stiffness is singular in the case of the dependent constrains. To reduce the disadvantages of these methods, this paper presents a new method for treating multi freedom constraint. Proposed method is similar to penalty function method and it is called “modified penalty function method”. The concept of the modified penalty function method is based on the constructing equivalent solver system of equations from traditional modified system using regulatory parameters. The basic of method for selecting the regulatory parameters is reducing the violation of modified system. For solving equivalent system the authors proposed an iterative algorithm for seeking the solution. The calculation programs are established based on proposed algorithm. The calculation results using the proposed method matched with the calculation results using other methods.
Nonstationary Deformation of Cylindrical shells Under a Plane Pressure Wave
Authors: Abdukadirov Sagdulla , Yuldoshev Bakhtiyor , Urinov Bakhtiyor , Nosirov Abdurasul
Published: January 2020

Nonstationary deformation of a cylindrical shell located in an infinite elastic medium is studied under plane pressure wave with a front parallel to the shell axis. A combined solution method is used in the paper. Separating the angular coordinate by the Fourier method, the plane problem is reduced to a series of one-dimensional problems for each harmonic. Applying the Laplace transform over time to these systems of equations, the exact solution in the images is obtained. Asymptotic solutions of the stress-strain state at large values of time t → ∞ are obtained. In parallel with this, a truncated system is numerically solved using an explicit finite-difference scheme and a method for minimizing numerical dispersion, which gives an accurate description of front discontinuities. A comparison of both solutions made it possible to determine the applicability limits of the asymptotic forms and to obtain an assessment of dynamic state of shell and medium during the entire time of interaction.
Machine translation system modeling based on sentences comparison
Authors: Sak Alexander
Published: January 2020

The problem urgency is determined by an increasing need for natural language processing systems especially in the area of construction and civil engineering due to an enormous amount of document in foreign languages to deal with. Author’s purpose is to figure out an approach to machine translation system based on initial sentence and online dictionaries examples comparison. Although online dictionaries are designed to be used by humans, application of some principles based on the theory of graphs and syntactic analysis as well as methods of sets allows to use them as thesaurus for natural processing systems. The author proves the reliability of this approach by using the properties of a relation such as reflexivity, symmetry and transitivity. As a result the author displays a part of a syntactic analysis block of his computer program as well as a block of the program responsible for comparing sentences on the basis of fundamental products. At the end of the paper the author comes to the conclusion that such an approach can be extended not only to the translation problem but also to a broad range of natural language processing issues.
Modelling the reliability of the implementation of the schedule building work
Authors: Evseev V O , Borkovskaya V G , Barkhi R
Published: January 2020

The main issue of the study is the analysis of the impact of the level of information security of the construction process and the impact of the level of professional competence of personnel on the reliability characteristics of the planned terms of construction work. The aim of the study was to construct a simulation model and conduct simulation cycles/experiments in order to obtain the probabilistic characteristics of the output parameters, which are the possible terms of construction and the probability of implementation of these terms. Also, the aim of the study was to determine the permissible level of professional competence of personnel and the permissible level of non-availability of primary information necessary for construction work. Results. Methods of computational mathematics in the Excel software environment built a simulation model of the construction process, which includes the sequential execution of several stages of construction work, taking into account the level of information uncertainty and probabilistic level of competence of personnel. Numerous graphical information of the change of construction terms under the influence of probabilistic factors is given. Conclusions: the Model has shown the possibility of controlling the probability vector of the construction process, and the ability to bring its output probability characteristics to acceptable deviations from the planned value.
Granular metamaterials for seismic protection. Hyperelastic and hypoelastic models
Authors: Kuznetsov Sergey , Maigre Hubert
Published: January 2020

The hyperelastic potentials along with hypoelastic models applicable to describe dynamic behaviour of the granular metamaterials at wave propagation in their structure under seismic activity are studied. The specially constructed potentials suitable for bimodular materials are analysed. Effects of possible mechanical energy transformation due to formation and propagation of the shock wave fronts are discussed.
Nonisocyanate hybrid polyurethane floorings based on cyclic carbonates: optimal compositions and service properties
Authors: Figovsky O L
Published: January 2020

Hybrid nonisocyanate polyurethane (HNIPU) materials are formed by the reaction between adducts of the oligomeric cyclocarbonates with primary di- and polyamines and epoxy oligomers. These materials do not have pores due to the reaction of their formation is insensitive to the moisture of fillers or substrate surface. Chemical resistance of the obtained material containing intramolecular hydrogen bonds is 1.5-2 times greater than material of the same chemical structure but without such bonds. The new material as well as ecologically safe method of its manufacture is discussed. HNIPU materials could be applied for monolithic floor coverings having high chemical-, crack-, wear- and fire resistance and minimal absorption of toxic or radioactive contaminations. The floorings have high adhesion, wear and impact resistance; do not contain organic solvents, harmful and toxic isocyanate substances. Monolithic two-component HNIPU floor coverings are used for manufacture of seamless floors where cleanliness, durability and abrasion resistance are crucial. The optimum composition and operational data of the flooring coverings are discussed.
Cluster Evolution from Ultrafast Laser Irradiation of Gold Nanoparticle: A Molecular Dynamics Study
Authors: Fahdiran Riser , Sugihartono Iwan , Handoko Erfan , Budi Setia , Urbassek Herbert M.
Published: January 2020

We study the evolution of clusters from ultrafast laser induced ablation of Gold nanoparticle by means of Molecular Dynamics (MD) simulation. The energy given to the system are varied from 2 eV/atom, with increment 1 eV/atom, up to 8 eV/atom which already above ablation threshold. The nanoparticle is considered to absorb energy from laser irradiation instantaneously and homogenously throughout the system and MD follow the trajectories up to 20 ps. The case for the lowest energy breaks up the system and forming hollow structure. While starting from 3 eV/atom, the system tears up and evaporate with final temperature above 2500 K. Clusters formation for all energies indicated that number of monomers increases following the increasing of energy while the sizes of overall cluster is decreases.
Detection of heavy metal containment of soil pollution due to waste of paper industry using Nd:YAG laser induced breakdown spectroscopy
Authors: Sugito H , Khumaeni A , Binu Q M
Published: January 2020

Detection of heavy metal containment of soil pollution has been made by using laser-induced breakdown spectroscopy (LIBS). A pulsed Nd:YAG laser (1064 nm, 8 ns, 200 mJ) was focused on to a soil sample, which is prepared in the form of pellet, at atmospheric pressure. Emission spectra taken from the waste-contaminated soil and uncontaminated soil were obtained. Plasma emissions are then detected using a multichannel analyzer (OMA) to obtain the emission line spectrum that represents the content of atoms and molecules in the target material. The spectrum is recorded and compared with the spectrum of reference standards of atoms, ions and molecules (National Institute of Standards and Technology/NIST) so that the atomic and molecular content in the sample can be known. From the results of the study it was found that there are elements of heavy metals in the form of Fe, Cd, and Mg in polluted soils.
Thermoelectric Properties of SbTe
Authors: Najma Zahiroh Sahdianingrum , Singsoog Kunchit , Melania Suweni Muntini , Seetawan Tosawat
Published: January 2020

From the research to determine the thermoelectric properties and crystal structure of SbTe material synthesized by ball mill at 350 rpm for 10 h and sintered with hot press. The hot press method was varied at the time of hot press for 1, 2 and 3 h. The hot press temperature is 400 °C with a pressure of 25MPa. Then all materials were tested by XRD and ZEM 3. Based on the XRD test performed, all materials had hexagonal crystal structures. From ZEM 3 measurement known that the best thermoelectric properties value is in sample 3 which has an electrical resistivity 0.35 mΩcm at 331 K, Seebeck coefficient 147 µV/K at 473 K and power factor 4.53 mW/mK2 at 331 K.
Synthesis and Characterization of Nd2Fe14B Powder by using Mechanical Milling of Flakes NdFeB
Authors: Ramlan  , Setiabudidaya Dedi , Suprapedi  , Amminudin Bama A , Muljadi
Published: January 2020

Flakes NdFeB is one of type NdFeB alloy made and it was produced by strip casting method. Flakes NdFeB can be used as a raw material to produce sintered permanent magnet and it has about 0.2 – 0.3 mm in thickness. The flakes of NdFeB was milled by using High Energy Milling (HEM) machine and used a liquid toluene as milling media. The milling time was varried such as : 15, 30, 60 and 90 minutes. After milling, the samples were dried by using vacuum dryer at temperature 80°C under vacuum (10 mmbar) for 2 hours. The fine powder samples were analyzed crystall structure by using XRD, measured magnetic properties by using VSM and also measured particle size distribution (PSA). The characterization result show that the milling time gives an effect on the crystal structure and magnetic properties, where samples with milling time 60 dan 90 minutes has Fe phase as dominant phase and the Nd2Fe14B phase does not existing also the coercivity value tends to decrease until lower than 900 Oe. Samples with milling time about 15 and 30 minutes have Fe phase and Nd2Fe14B phase also they have corecivity value about 2000 – 2250 Oe. The means of particle size is achieved about 43.59 µm at sample with milling time 15 minutes.
Mechanical Properties of Natural Rubber Compounds with Oil palm boiler ash and Carbon Black as a Filler
Authors: Bukit N. , Ginting E.M. , Sidebang E. , Frida E. , Bukit B.F.
Published: January 2020

This study aims to determine the mechanical properties of natural rubber compounds with variations of OPBA nanoparticle fillers and carbon black. Preparation methods for natural rubber compounds using Open Mill. Indonesian rubber standard -20 (SIR-20) mixed with anti-oxidants, activators, curing agents, accelerators and OPBA nanoparticle fillers size 56.31 nm and commercial Carbon black type (N330) with variations (0,2,4,6 and 8)% wt. The results showed that tensile strength increased with the increase in the composition of OPBA nanoparticles and carbon black, as well as the elongation of break and hardness. The best composition of OPBA filler 8% wt showed a hardness of 52 Shore A, a tensile strength of 1.7 MPa, an elongation of break 150%. The best composition of carbon black 8% wt filler with a hardness of 55 Shore A, a tensile strength of 2.5 MPa, elongation breakdown of 140%.
Synthesis and characterization Fe3O4/GOnanocomposites as lithium-ion battery anodes (LIBA)
Authors: Simamora P. , Al Khalil J. , Rajagukguk J.
Published: January 2020

The Nanocomposite based on magnetit-graphene oxide Fe3O4/GO for Lithium-Ion Battery Anodes(LIBA) has been succesfully synthesized by co-precipitation method. First, GO was synthesized by Hummer’s Method and Nanoparticles Fe3O4were synthesized by co-precipitation method and coated with PEG 6000. Then the results were characterized by XRD and SEM. From the results obtained, graphite has become graphene oxide indicated by a shift of 2θ from 26,18° to 11,7°. Nanoparticles Fe3O4have also been successfully demonstrated with corresponding results. As well as Nanocomposite Fe3O4/GO which match the characteristics. I-V Meter results showed that nanocomposites have good electrical properties.
Effect of antimony (III) oxide on reduction of bubbles from glass melting process
Authors: Singkiburin N. , Srisittipokakun N. , Keawkhao J.
Published: January 2020

In this paper, studied the refining effects of Sb2O3 and ultraviolet transmitting property of NaCaBSi glasses. These raw materials were weighted according to the (35-x)SiO2: 30B2O3:15Na2O:10CaO:10ZnO:xSb2O3 where x=0.0, 0.05,0.1, 0.5, 1.0 and 2.0 mol%. NaCaBSi glasses were obtained by using melt quenching technique and characterized by using density, refractive index, optical absorption spectra and the number of bubbles in glass measure as a function of different concentrations. The density (ρ), molar volume (VM) and refractive index obtained were found to increase with increases in the concentration of Sb2O3 in the glass matrix. The optical absorption spectra of glasses were measured in the wavelength of 200 – 2,000 nm. Number of bubbles in glass decrease when increasing Sb2O3 concentrations.
Synthesis and Luminescence properties of Lithium Aluminium Phosphate Glasses Doped with Nd3+ Ion for Laser Medium
Authors: Sangwaranatee N , Chanthima N , Kaewkhao J , Tariwong Y
Published: January 2020

Nd3+ ion doped lithium aluminium phosphate glasses were synthesized and studied their properties for laser medium application. The density and the refractive index of the glass samples were carried out at the room temperature. The optical and luminescence properties were studied by investigating absorption and NIR emission spectra of the glass samples. The glasses absorbed photons in ultraviolet (UV), visible light (VIS) and near-infrared (NIR) regions are clearly observed from absorption spectra. For the photoluminescence properties, the glass samples showed the strongest emission at 1063 nm when it were excited by 581 nm which assigned to the energy transitions of Nd3+. The three phenomenological Judd-Ofelt parameters (Ω2, Ω4, Ω6) were determined from the spectral intensities of absorption band in order to calculate the radiative transition possibility (AR), stimulated emission cross section (σ(λp)) and branching ratio (βR) of the w4F3/2 → 4I9/2, 4I11/2 and 4I13/2 transitions. From the obtained results the conclusions made about the possibility of using these glasses as laser material.
Surface Thermal and Electric charge of PN Diode Expose by Soft Radiation Flash Exposure
Authors: Sangwaranatee N , Srithanachai I , Niemcharoen S , Chaiyasoonthorn S
Published: January 2020

In this study present the effect of soft radiation flash exposure (SRFE) to forward bias current-voltage (I-V) of PN diode by using COMSOL simulation program. The results show surface thermal and electric change while expose by radiation with flash exposure technique. Series resistance (Rs) increase around 2 times and close to idea case after expose by radiation, the radiation will impact to bulk defect and reduce surface recombination. SRFE induce temperature on surface and deep into silicon bulk. The value of Rs increase with increase expose time. The changing of Rs becomes independent from radiation dose at high forward bias voltage.
Fabrication and Characterization of Adding Coconut Shell Actived Nanocarbon to Lightweight Concrete
Authors: Lubis H , Sharman E , Chairina E , Siregar I , Rizky M , Maiya D , Machdhalie T
Published: January 2020

Coconut Shell actived Nanocarbon to Lightweight Concrete have done. LWC mixture of CS actived nanocarbon fillers made by mixing PPC cement, sand, broken stone, coconut shell actived nanocarbon fillers and water in various proportions. The ratio of CS actived nanocarbon on filler used (x = 0%, 5%, 10%, and 15%), with the aim of getting a different level of compressive strength testing. The particle size of activated CS carbon using the high temperature physical activation method 800C and chemistry (immersion of ZnCl2 solution) has an average diameter of 4,842.8 nm. The SEM shows that high porosity occurs and the shape is not homogeneous. EDS analysis to determine composition of the elements in the sample is known that the CS activated carbon samples have a maximum value in the element Carbon, Oxygen. The sample of CS actived Nanocarbon to LWC x = 0%, the results of the maximum value of % mass and % atom are the elements Oxygen, Carbon, and Calcium. For x = 10% the maximum value are the elements Oxygen, Carbon, and Silicon. The value of the strength of the objects in the CS activated carbon filler concrete sample (x = 5%) has maximum strength value 12.9 Mpa.
Application Of Geoelectrical Measurements For Identify The Liquefaction Potential Area In Lobu Tua Village
Authors: Syandi Ricky , Tampubolon Togi
Published: January 2020

Active subduction off the Indian Ocean coast of Sumatra, Sumatra Subduction Zone, admits the responsibility of triggering earthquake along the boundary region on Sumatra Island. Lobu Tua Village is located near to coast Sumatra that has an underground layer in the form of Alluvium which is considered in the vulverable subsurface layer. The aim of this research is investigating the characteristics of stratification and soil properties in Lobu Tua village by using geoelectrical Data is collected from resistivity meter of ARES-G4 v4.7 SN: 0609135. Schlumberger Geoelectrical method is applied to do groundwater mapping by resistivity value at some path. The first path shows the results of electrode measurements are 6.38 meters of the base layer from the lateral surface with the area of silt soil 155 meters, may lead to land subsidence (liquefaction). The second path shows the groundwater-surface in the sounding layer is 21 meters with the potential landslides. The 2-dimensional cross-sectional model image was performed to display the cross-sectional resistivity of the rock coating method by using the Res2Dinv.
Uneven Coating Influences on Electrical Impedance of Quartz Crystal Microbalance
Authors: Sakti S P , Kamasi D D. , Nuha S A , Setiana M
Published: January 2020

High shear modulus coating material does not provide loading effect to the Quartz Crystal Microbalance sensor. The condition is met when the coating material was glassy and the layer was homogeneous. Polystyrene is considered as a glassy coating material when used on 10MHz Quartz Crystal Microbalance. Homogeneous and compact polystyrene coatings that are glassy can be obtained using the spin coating method. The film’s rigid condition is shown by the sensor impedance value at the series resonance frequency after coating. However, using ultrasonic spray coatings, it was known that polystyrene films are formed not as homogeneous as when coated using spin coatings. We observed that Quartz Crystal Microbalance was damped by the polystyrene film when the coating film was not evenly distributed over the sensor surface, especially on the sensor surface above the electrode. The minimum impedance of the QCM sensor increased significantly. The unevenness of the coating causes the damping effect on the QCM sensor. The minimum sensor impedance before coating was less than 15 Ohms. When the polystyrene layer was uneven, we found that the impedance increased by more than 25 Ohms. The results showed that the distribution of polymer layers on the sensor surface is one of the important factors that must be considered to avoid the effect of damping on the sensor. The measurement results showed that the sensor has a negative mass effect.
Design of E-nose as an Instrument Identification of Diseases Through the Respiratory Tract
Authors: Yakob Muhammad , Mustika Dona , Ida Ratna Nila , Rachmad Almi Putra
Published: January 2020

The identification of a particular illness is usually done by microscopic check-up from the phlegm, urine, blood, Rontgen, and CT-scan. This technique needs a long period, high cost, and complicated procedure. As a result, society feels reluctant to check up on their health. Thus, research of an instrument that can define and diagnose the illness easily, efficiently, and accurately is needed. This research developed a prototype of an electronic nose that consists of a gas sensor that can respond quickly the element of volatile organic through the breathing air. Principal component analysis (PCA) method is the most appropriate method to classify the type of illness visually. Therefore, this research is needed to be applied in medical instrumentation.
Measurement and Evaluation of Sound Intensity at The Medan Railway Station Using a Sound Level Meter
Authors: Indrayani  , Asfiati Sri , Riky Milza Ndruru , Rajagukguk Juniastel
Published: January 2020

Trains are means of transportation that are used by people to avoid traffic congestion. However, train stations are also most frequently exposed to noise. This is due to the sound intensity of the operational activities in the location. Passengers and station officers are environmental components exposed to noise. In this study, the value of sound intensity level at the railway station of Medan city is measured using Sound Level Meter. This measurement was carried out for six days. The highest sound intensity level for the train departures is 96,67 dB and for the train arrival is 96,66 dB. Meanwhile, the lowest sound intensity level of train departures is 81,41 dB and the arrival of trains is 83,75 dB. It was found that the high level of sound intensity is sourced from the friction of the wheels with the rail surface, notification speakers and train horns. The results of this study can be used to find the most appropriate solution to reduce the noise level in the railway station area.
A Proposal of Dynamic Scales for Measuring the Mass of Agricultural Products
Authors: Djamal Mitra , Satria Eko
Published: January 2020

The rapid development of agricultural products industry in Indonesia presents a new challenge for the industry. The high demand for agricultural products makes the industry must think to manage the plantations more effectively and efficiently. One of the problems in plantations is the process and procedure of weighing agricultural products. At this time the process of weighing agricultural products takes a long time and a long procedure. In the industry, processes and procedures for weighing agricultural products as they are today being considered inefficient. Direct weighting at the time of collection is assessed to be rapid and highly beneficial to the industry. But there is a problem when weighing is done directly. If weighing is done directly at the time of collection, then the weighing is done under dynamic conditions. To be able to solve the problems in weighing the agricultural products then proposed a study to build a dynamic weighing system that can weigh dynamically where direct weighing agricultural products can be done at the time of collection. The force transducer will measure the force applied by the weighing system and the load in the form of industrial products. Because the system works in a dynamic state, the forces acting on the force transducer can be calculated using Newton’s second law

m

k

=

(

F

a

)

−

m

t

where a is the deformation acceleration of the force transducer which is proportional to the acceleration of the weighing system, mt
is the mass of the weighted system supported by the force transducer and mk
is the mass of the product being weighed. The deformation acceleration of this force transducer is measured using a flat coil.
The Dy2O3 Effect Study on Spectroscopy and Optical Properties of PbiNaGd Glass for Optical Amplification
Authors: Situmorang R , Rahmaniar  , Panggabean D D. , Sarumaha C. , Kaewkhao J , Sunaryono  , Rajagukguk J
Published: January 2020

The medium glass was made from chemical compounds with the compositions (70-x) P2O5 - 10Bi2O3 - 10Na2O - 10Gd2O3 - xDy2O3 (where x = 0; 0.05; 0.1; 0, 5; 1.0; 3.0 (mol%)) which was doped by active ion xDy2O3. All of proposed chemical compounds are in the form of powder with the mass of 20 grams of mixture in an alumina crucible and prepared by melt-quenching method. The glass has been obtained with a size (3x10x10) mm3 and smoothed to get a flat surface and high transparency. Optical properties of glass samples Dy:PBiNaGd determined by measuring by absorption spectrum and spectrophotometer at area visible with different concentration. Analysis indicates eleven inhomogeneous displacement bands at various positions and intensities with hypersensitive transitions at 1274 nm (6H15/2→6F11/2). Emission spectrum in medium glass Dy:PBiNaGd is supported using excitation wavelength (λeks) 350 nm and indicated that the highest intensity is in Dy:PBiNaGd4 where there four transition band emisions are namely 4H9/2 → 6H13/2 (483 nm), 4H9/2 → 6H11/2 nm), 4H9/2 → 6H9/2 (661 nm) and 4H9/2 → 6H6/2 (750 nm).
Improved natural gas storage with adsorbed natural gas technology (ANG) using activated carbon from pineapple crown
Authors: Yuliusman  , Nasruddin  , Naf’an H I , Sinto J , Nugroho Y W , Nafisah A R , Sipangkar S P
Published: January 2020

Natural gas considered as alternative fuel that still has the enough availability in Indonesia. One of the utilizations of natural gas is ANG technology which based on adsorption principle. The adsorption of natural gas occurs in isotherms condition at 27 °C, 31 °C, and 35 °C and using low pressure up to 9 bar. Activated carbon were used from bio-based carbon from pineapple crown with IOD number 1337 mg/g and surface area 1190.799 m2/g which compared to commercial activated carbon with iod number 1727 mg/g. Bio-based carbon were prepared through chemical and physical activation. This study begins with making preparation for the ANG (Adsorbed Natural Gas) technology will be used, degassing process, measuring the void volume, storage capacity, and delivery capacity. The maximum storage of pineapple crown activated carbon reached 0.0397 kg/kg at 9 bars 27°C with desorption efficiency of 43.82% and commercial activated carbon reached 0.0429 kg/kg at 9 bar and 27°C and desorption efficiency of 43.82%.
A review: microbiology perspective of zika virus
Authors: Airlangga G W , Rama Wisesa I B G
Published: January 2020

The aim of review is to increase a quality of information about zika virus in microbiology perspective. Zika virus is an emerging-mosquio borne that was founded in Uganda 1947. Zika virus was transmitted to human in 1954 in Nigeria and first human infection in Asia were reported in Indonesia, Central Java in 1977. WHO was declared that zika virus was a global health emergency in 2016. Zika virus is flavivirus that was brought by mosquito (Aedes aegypti and Aedes albopictus). Zika virus had a several fatal effect like microencephaly and Guillain-Barre syndrome. Recently there is no medicine or vaccine for zika virus. Early diagnostic will help HCP (Health Care Professional) to provide early treatment for human infected. There was several rapid diagnotic for zika virus like ZnO nanostructure and paper disc.
Preventive effect of kefir in BALB-c (Mus musculus) induced by ovalbumin towards relative amount of B cell-Ig-E
Authors: Qosimah Dahliatul , Murwani Sri , Amri Indah Amalia , Prasetyo Dodik , Rifai Muhaimin , Kusuma Indra Darpa , Purba Olfivesen , Pranoto Yurisa Noviaji , Rahmadiani Fakhira , Sanjoyo Ayu Mahanisa
Published: January 2020

Food allergy or hypersensitivity is defined as “all reactions that are triggered by immune cells after food intake, including hypersensitivity type 1 reactions, mediated by IgE produced by Plasma B cells. Ig E will bind to mast cells causing degranulation and release of inflammatory products resulting in tissue damage. This study aims to determine the preventive effects of Kefir on Balb-C Mice (Mus Musculus) induced by ovalbumin on the relative number of B-Ig-E cells. The research method is a true experimental laboratory control post design only consisting of 5 treatments and 4 replications, consisting of negative control (healthy): placebo Nacl Physiological, positive control (ovalbumin at a dose of 20 μg/mice and adjuvant Al (OH)3 1000 μg on days 8 and 15 and re-induced orally with a dose of 60 mg/mice and 10 mg/mice Al (OH) 3 on the 29th day), T1, T2, T3 (kefir for 14 days with doses of 300, 600 and 900 mg / kg body weight and ovalbumin. Data on the relative amount of B+ cell-Ig E are quantitative then analyzed using the One-Way ANOVA test with a 95% confidence level to find out the differences between treatments significantly. The results showed that administration of kefir and ovalbumin to the relative number of B+ cells were not significantly different between the treatment groups while the decrease in the relative amount of IgE+ occurred in the T1 group. The conclusion shows that administration of kefir can decrease B+ cell-Ig E+ in ovalbumin-induced mice.
The preventive effect of Rome beauty (Malus sylvestris Mill) apple peel’s extract towards the malondialdehyde (MDA) levels of rat (Rattus norvegicus) stomach exposed to plumbum acetate
Authors: Ghassana D A , Marhendra A P W , Haskito A E P
Published: January 2020

Plumbum (Pb) is one of heavy metals that can turn into free radicals, resulting in the descent and alteration of cell structures of the stomach. Apple of Rome beauty contains high flavonoids which act as antioxidant agents by supplying hydrogen ions to the free radicals. This research utilized white rat (Rattus norvegicus) divided into 5 treatment groups, each group consisted of 4 white rats. They are negative control, positive control which were given 10 mg of Pb acetate for each rat/day in 14 days, and preventive control group which were given the extract of Rome Beauty apple peel within the dosage of 28 mg/200 g, 56 mg/200 g, and 112 mg/200 g for 21 days. The parameter observed were MDA levels of stomach. The result was then analysed with One Way ANOVA which was followed by Turkey. The result of this research exhibited the preventive group which was given Rome Beauty apple peel within the dosage of 112 mg/200 g was able to halt the increase of MDA levels significantly (p<0.05), which was 82.16 ± 1.40 μg/ml. The research concluded that Rome Beauty apple peel contain antioxidant that can prevent the damage of stomach tissue resulted by Pb acetate.
Mobile Application Development for Tourist Guide in Pekanbaru City
Authors: Nugraha N B , Alimudin E
Published: January 2020

Pekanbaru City is a place that has a huge tourism potential. Pekanbaru is very strong with the Malay culture that is proven that Pekanbaru has many Malay style tourism buildings. The culture of Pekanbaru city has different attraction for tourists. Various information about tourism developments, supporting facilities, tourism objects, visitor information about the locals is important information to know. However, many unknown places are worth a visit but people do not know about their existence, because of the lack of public information. The purpose of this research is to design an application on an Android smartphone for Tour Guide Pekanbaru. The system will use GPS to find the user point and can provide information about tourist attractions, hotels, restaurants and shopping so that they can use the time in Pekanbaru effectively. The recommendation would be to use the neighboring K-nearby algorithm (KNN) to determine the closest place. The result of this tour guide is the user can detail information about tourist attractions, hotels, places to eat and shopping centers in the city of Pekanbaru as desired by the user. Tourist attraction information and directions with minimal GPS accuracy error 10 meters distance and maximum error 40 meters. The speed of the application in determining the user position depends on strong network signal and the condition of the surroundings
Mental Analysis Workload on Solar Street Lighting Workers
Authors: Prabaswari Atyanti Dyah , Utomo Bagus Wahyu , Tauhida Dina
Published: January 2020

The workload for each scope of work has different responsibilities. The workers will face working hours, loads, remember many patterns, and frustration when doing a special task. Solar street lighting (PJU TS) installation project is affected by various risks. NASA TLX as a tool to measure the workloads. The analysis not only using NASA TLX but also using statistical testing. The Mental Demand (MD) has score 325 (the highest score) due to considerable mental activity. The Performance (P) has a score close to zero that categorized quite well. Regression and correlation analysis between mental demand and duration of work show the direction of positive relationships. More experienced makes more MD scores. That is because every PJU installation project has different criteria. The solution is bookkeeping and mind mapping regarding the type of PJU TS. Each PJU TS has the book as a guide in the field.
Web-based Encyclopedia of Nature Tourism, Religion, and Culinary in Kudus City
Authors: Listyorini Tri , Meimaharani Rizkysari
Published: January 2020

Kudus City is one of the cities in Central Java Province. Tourism potential in the city of Kudus is very large. Besides being known as the City of Kretek, Kudus also has religious, natural and culinary tourism which is well-known in Java. Kudus is famous with the religious tourism for the existence of Sunan Kudus and Sunan Muria’s graves. Kudus also has beautiful nature, along with the development of a very interesting time. Nature and religious tourism, Kudus specialties are well known in Indonesia. Therefore, this research produces a forum that contains information and locations for natural, religious and culinary tourism in the Kudus city. From this encyclopedia, people can search for the destination and it is equipped with a map as the closest distance guide because in this application it is connected to Google Maps API.
Web Utilization and Telegram Gateway Features for Management of Booking Make Up Services at Ulfisinta Make Up
Authors: Choiyanti Fita , Latifah Noor , Triyanto Wiwit Agus
Published: January 2020

Advances in information technology that is increasingly developing now has been used as a very important means to produce the information needed. WWW technology or the web as one type of service that is connected with the internet. One of the uses that require the application of web-based information technology is service in make up services. In Ulfisinta Make Up in its management, the recording of consumer data is still done manually or handwritten notes, causing misunderstanding between admins because the notes are sometimes unclear. Lack of management of consumer data if there is a booking in a period of time that is still long. The amount of proof of payment or transfer that must be stored so that it takes a long time if the data is needed again. This study aims to build an Application Management Information System for Make Up Services on Ulfisinta Make Up Web-Based with Telegram Gateway Feature which is expected to be used in the future for booking management and also a means of information to consumers to get information faster.
Flexural properties of the epoxy resin filled with single and hybrid carbon nanofillers
Authors: Glaskova-Kuzmina T , Aniskevich A , Zotti A , Borriello A , Zarrelli M
Published: January 2020

The aim of this paper was to estimate the effect of moisture and temperature on the flexural properties of the epoxy filled with single and hybrid carbon nanofillers (CNTs and CNFs) and to reveal the most environmentally stable NC. Water absorption at 70 °C until equilibrium moisture content and heating at 70 °C for 4 weeks were followed by freezing at -20 °C for 8 weeks. Microstructural characterization of optical images revealed homogeneous dispersion of all carbon nanofillers in the epoxy resin at microscale. Positive nanofiller effects were found for sorption, flexural and thermophysical characteristics of the epoxy resin. The most environmentally stable NC was epoxy filled with 0.1 wt. % of CNTs/CNFs hybrid, which had the lowest effect of temperature and moisture on mechanical characteristics, along with the lowest equilibrium water content and diffusivity.
Effect of annealing on the static properties of Ti-20Nb-10Ta alloy
Authors: Konushkin S V , Sergiyenko K V , Sevost’yanov M A , Nasakina E O , Sudarchikova M A , Tsareva A M , Baikin A S , Kaplan M A , Shatova L A , Kolmakov A G
Published: January 2020

The effect of heat treatment on the static mechanical properties of a Ti-20Nb-10Ta shape memory alloy in the form of thin wire is studied. After annealing at 600 °C for 20 minutes, a low modulus of elasticity was obtained. The best strength and ductility indicators were obtained after annealing at a temperature of 800 °C during 60 minutes.
Development of copper dispersion-strengthened composite material with increased indexes of high-temperature strength and wear resistance for thermally loaded friction pairs
Authors: Vladimirova Y O , Shalunov E P
Published: January 2020

The article presents the chemical composition, technology and general properties of copper dispersion-strengthened composite material developed by the authors based on Cu-AlC-O system with increased indexes of high-temperature strength and wear resistance for parts of thermally loaded friction units and, first of all, for valve guides of highly forced internal combustion engines and plungers of die-casting machines. This material containing 0.9 wt % aluminum, 0.3 wt % carbon has recrystallization temperature of 1000 oC and has higher tribotechnical properties comparing with standard materials. In particular, the wear out intensity of the developed material is 2.9 lower comparing to gray cast iron Gh 1051, which is used for valve guides. At the same time, wear of coupled element is also became 2.8 times less. The technology of new material is based on the method of reactionary mechanical alloying in the attritor, which provided the material with dispersion-strengthened subgrain structure with γ -Al2O3 reinforcing nanodisperse particles.
Experimental studying of the crack resistance for the CuAl9Mn2 alloy during growing of samples by the method of laser powder surfacing
Authors: Makarova N V , Dudko O V , Mantsybora A A , Yatsko D S
Published: January 2020

The paper presents the results of experimental studies of crack resistance at the fusion boundary of the base material and the built-up layer in cylindrical specimens made of CuAl9Mn2 alloy using additive technology of powder laser surfacing. The aim of the study is to analyze possible changes in the mechanical properties of the base material at the fusion boundary under the action of high temperatures. On the basis of the experimental data it is obtained that the thermal action during laser powder surfacing has not a great impact on the crack resistance of both the base material and the built-up metal.
On the analysis of energy dissipation and ratcheting during cyclic deformation of the titanium alloy VT6 (Ti-6Al-4V)
Authors: Zakharchenko K V , Kapustin V I , Shutov A V
Published: January 2020

The paper is focused on the analysis of deterioration of strength properties during cyclic deformation of the titanium alloy VT6, which is widely used in numerous engineering applications. A set of experimental data is obtained, regarding stress-controlled cyclic loadings with variable R-values; the influence of the mean stress on the irreversible processes is estimated. The impact of a previous loading history on ratcheting and dissipation-induced heating is clarified. The use of the obtained experimental data for creation and calibration of constitutive models is discussed.