bluuebunny/crossref_metadata_2025_split huggingface dataset:
Shear Strength of Reinforced Concrete Beams Strengthened with Near Surface Mounted Steel Plates
Authors: Thamrin R , Haris S , Zaidir  
Published: March 2020

Abstract
Near surface mounted horizontal steel plates was applied to study the contribution of this strengthening method on the shear capacity of reinforced concrete beams. Specimens were nine reinforced concrete beams without stirrups consisting of three control beams and six beams strengthened with steel plates. The test variables were the ratio of the longitudinal reinforcement and the position of steel plates in the vertical direction of the web side of the beam. The specimens were loaded up to failure using a four-point bending test. The contribution of steel plates on the shear capacity was observed by monitoring the ultimate load and deflection of the beams. The test results show that the shear capacity of beams strengthened with steel plates 17% to 50% higher than the control beams depending on the position of steel plates and the ratio of longitudinal reinforcement. It was also observed that the ratio of longitudinal reinforcement influences the failure mode of the beams.
Effective Performance Evaluation to Estimate Cost and Time Using Earned Value
Authors: Susilowati F , Kurniaji W M 
Published: March 2020

Abstract
The data from Badan Pusat Statistik (BPS) Indonesia, show that the development sector in the Yogyakarta region is changing rapidly, especially with the construction of new airports in the region. That demands the effectiveness and efficiency of cost and time in every construction. It requires supervision, evaluation, and performance control in the construction process. In this effort, this research discusses more detail about the calculation of construction project performance using the earned value method. This research conducted on an integrated development project consisting of malls, hotels, and apartments in Sleman, Yogyakarta. The research data collection was carried out by direct observation and analysis of supporting project data. The data obtained were processed and analysed using the accepted value method. The results of this study indicate that at the end of the review, the Schedule Performance Index (SPI) obtained a value of 0.58. Project progress in the field shows that the project has a 41.48% delay. It can see from the initially planned project of 99.06%, but at the time of review, the realisation was only 57.22%. In terms of costs, the Cost Performance Index (CPI) is 1.25. It shows that the costs incurred during the review are still less than the existing budget plan. At the end of the review period, the estimated final project costs are obtained, both direct and indirect costs. With the tendency of project performance at the time of review, the value is still less than the project budget, while the estimated time of project completion will be longer or late at around 56.52% of the planned schedule.
Macroscopic Flow Models of State Highway Midblocks under Mixed Traffic Flow Conditions: Ramon Magsaysay Boulevard Case Study
Authors: Santos M S Delos , Alzona A R , Taguba M A , Vahdanipour C M 
Published: March 2020

Abstract
Macroscopic flow modelling has been fundamentally used to characterize and predict the traffic flow parameters of a continuous road utilizing the analogy for one-dimensional fluid flow. In the Philippines, Ramon Magsaysay Boulevard is a major arterial road that links Manila City to various important cities in the Metropolis. Due to its noticeable deteriorating performance in addressing the increasing traffic flow demand, this work investigated the corridor capacity and characterized the key traffic elements along the major mid blocks using Greenshields model. It is assumed that road users behave uniformly and continuously distributed over the highway to choose a path to minimize their total travel time based on instantaneous traffic information. Investigation shows volume demands exceeding the design traffic capacities equivalent to 0.7429, 1.7959, 0.7226, and 1.4726 VCR ratios.
Fresh and Hardened Properties of Self Fiber Compacting Concrete (SFCC) Incorporated with Zeolite and Nylon
Authors: Afriandini Besty , Monika Fanny , Saleh Fadillawaty , Prayuda Hakas , Cahyati Martyana Dwi , Djaha Siti Isnaini Kurniawati 
Published: March 2020

Abstract
This study discusses the use of zeolite waste and nylon fiber which are used as added material in making concrete. The type of concrete used is self fiber compacting concrete (SFCC). Self-Compacting Concrete (SCC) is a type of concrete that emphasizes a high enough workability value so that the concrete can flow and solidify itself during the casting process. In this study, fresh and hardened properties will be tested. The fresh properties tested consisted of slump flow, T50, V-Funnel and L-Box while the hardened test of concrete consisted of compressive strength, splitting tensile strength and flexural strength. Nylon fiber is used as much as 1% of the weight of cement with length of 50 mm, while zeolite ash is used as a substitute for cement with variations of 5%, 10% and 15%. The purpose of this study was to determine the effect of nylon and zeolite ash variations on fresh and hardened properties of self fiber compacting concrete. The results show that using these two additional materials can be applied to self-compacting concrete because it meets predetermined standards for the fresh properties of concrete. In the hardened properties of the mixture of 5% zeolite produces higher compressive strength, splitting tensile strength and flexural strength than other variations. It can be concluded that the content of 1% fiber and 5% zeolite ash instead of cement is the optimum level and suitable for self-fiber compacting concrete.
Optimization of the compressive strength of hair fiber reinforced concrete using central composite design
Authors: Santos F D , Taguba M A M , Alzona A R , Basada R C S , Elbit J M A , Nones G L , Olido K P M , Ramos E U G 
Published: March 2020

Abstract
In society today, improper waste disposal brings about numerous problems. One of the most common residual wastes found in the municipal solid waste is human hair. This waste, which is evidently continuing to accumulate in disposal streams poses a threat if not disposed properly. Several studies have been done in the search for possibilities of incorporating hair to construction materials. In this study, the compressive strength of Hair Fiber Reinforced Concrete (HFRC) was studied aiming to find the combination that would yield the optimum compressive strength. A parametric study on the effect of amount of hair (1%, 2% and 3%) as well as length of hair strand (0.5-inch, 1 inch and 1.5 inch) on the compressive strength of HFRC was done. The results of the parametric study were used to find the optimum compressive strength. Utilizing the Central Composite Design (CCD) of Response Surface Methodology (RSM), a mathematical model was produced relating the parameters and the combination of parameters that would yield the maximum compressive strength. Based on the results, the mathematical model obtained a Coefficient of Regression of 0.9807 showing that the probability plot of the residuals fits the regression line. As generated by the mathematical model, a combination of 3.2% amount of hair by volume of concrete and a hair strand length of 0.752 inch will yield an optimum compressive strength of 38.15 MPa.
Evaluation of the implementation of the motorcycle lane based on the riding experience
Authors: Kurniati T , Purnawan  , Yosritzal  , Putri E E 
Published: March 2020

Abstract
Currently, two-wheeled vehicles or motorcycle dominate more than 80% of motorised vehicles in Indonesia. A large number of motorcycles result in complicated traffic operations and reduced levels of safety. Lanes separation is the best engineering solution to overcome this problem. Several cities in Indonesia have implemented special motorcycle lanes. The results of the study stated that this program was not successful. This paper tries to evaluate the application of motorcycle lanes in terms of the user’s riding experience. The Sleman Outer Ring Road in Yogyakarta which has implemented a special motorcycle lane is the location of this study. Data collection was carried out through online questionnaire interviews. Respondents provide answers on a choice of four (4) scales, namely, strongly agree, agree, disagree, and strongly disagree. The method of analysis used for evaluating the use of a motorcycle lane is the descriptive statistical method and the chi-square test. Based on the experience of riding on an exclusive motorcycle lane, assessment of the special motorbike lane geometric and traffic flow is good.
Main Task and Functions Stakeholders Institutional to Improve Safety Culture in Construction Sector
Authors: Machfudiyanto R A , Latief Y , Suraji A , Sagita L 
Published: March 2020

Abstract
OSH culture cannot be carried out if the existing institutional scheme is not strong enough or the institutional authority possessed is insufficient in making improvements in the construction sector, so it can be identified Institutions / institutions / organizations / stakeholders that must be involved in OSH institutions to build a Safety culture. The purpose of this research is to find out the main tasks and functions of each stakeholder to form a strong institution in the construction sector. Analysis methods used are using benchmarking, literature studies and validation of safety experts. The results of this study are that the stakeholders identified include the Occupational Safety and Health Services Company (PJK3), DK3N, the Committee for Occupational Safety and Health (P2K3), the Ministry of Manpower, the Director General of PPK and Safety, the Directorate of OHS Norms Supervision with Main Tasks and Functions that have been identified to enhance Safety Culture in the Construction sector.
Application of nanopowders in industrial production of mixed feed
Authors: Chkalova M , Shahov V , Pavlidis V , Solovyov S 
Published: March 2020

Abstract
One of the main directions of the feed manufacturing industry development is the improvement of the output product quality that ensures its efficacy in modern agricultural production. Some international experience in using the essential microelements in the form of nanopowders in the diets of farm animals has been gained. The article is devoted to the development and justification of a technical solution to the problem of dispensing ultrafine (nano) powders in the industrial production of combined feeds. The authors carried out theoretical and experimental studies of the influence of the conditions of functioning of industrial-technological equipment on the properties of several nanopowders of micro metals. The parametric model of the proposed pneumatic dispenser of bulk nanomaterials allows taking into account various structural and technological changes in the dosing process during the preparation of feed mixtures. The author presents a methodology for calculating the oscillatory system of a pneumatic dispenser, including an annular membrane with fixed edges, based on the equivalent replacement of a system with distributed parameters (membrane) with a system with lumped parameters, which allows replacing the oscillatory model with a translational motion model. An engineering-mathematical model that describes forced membrane oscillations, the dispenser oscillation system and the behaviour of the ultrafine material in the working chamber was constructed on its basis. Practical implementation of the results made it possible to obtain a prototype of bulk ultrafine materials dispenser.
Determinants factors toward the performance of the employee in the crude palm oil industry in West Sumatera, Indonesia
Authors: Tannady Hendy , Andry Johanes Fernandes , Nurprihatin Filscha 
Published: March 2020

Abstract
Human resources are the most important part in achieving organisational goals and improving organisational performance, in completing its work human resources require an adequate working environment and compensation as a reward for providing maximum work results. The purpose of this study is to examine and analyse the effect of compensation (X1) and work environment (X2) on employee performance (Y), especially in the crude palm oil industry in West Sumatra. Observations were made on three companies, research conducted in March to June 2019 showed that between compensation and work environment has a positive and significant effect on employee performance. With the structural equation modelling approach and Lisrel 8.8 application assistance, the coefficient of estimated of compensation toward performance is 0.37 while the estimated coefficient of work environment toward performance is 0.42. Compensation and work environment simultaneously have a positive influence on employee performance of 0.65.
The effect of composition on hardness and wear resistance of rice plant fiber reinforced composite as a material of brake lining
Authors: Darmawan Agung Setyo , Purboputro Pramuko Ilmu , Febriantoko Bambang Waluyo 
Published: March 2020

Abstract
Asbestos type brake lining is widely circulating at a cheap price and guarantees the durability of brake shoes, but the result of friction powder in the form of small particles is very dangerous for human health. The study is based on the investigation of hardness and wear resistance in rice plant fiber reinforced composite which is fabricated with polyester resin, fiberglass, and addition of aluminium powder. The composite is hardness tested by using durometer shore D hardness tester. The composite is also wearing resistance tested. The result showed that the mechanical properties were improved due to the increasing of the rice plant fiber composition. The more composition of the rice plant fiber, the harder and the higher wear resistance of the composite. An increase in the composition of the rice plant fiber from 20% to 40% resulted in an increase in hardness of 23% and a decrease in wear by 9%
Environmental effects on hardness and wear resistance of composites reinforced by rice plant fiber as a material of brake lining
Authors: Purboputro Pramuko Ilmu , Darmawan Agung Setyo , Febriantoko Bambang Waluyo 
Published: March 2020

Abstract
The environment has an important role in determining the mechanical properties of composites. This study aims to investigate the effect of in-service environment on composite wear resistance in its use as a brake lining. Composites made from a mixture of rice plant fiber, fiberglass, aluminum powder and polyester resin are produced into brake linings. The brake lining is then tested for wear resistance using a friction machine. The test environment is dry, water, salt-water and brake oil. The highest wear is shown by the brake lining in the salt-water environment, while the lowest wear is shown when the brake lining is working in the brake oil environment.
Probing momentum-indirect excitons by near-resonance photoluminescence excitation spectroscopy in WS2 monolayer
Authors: Bao Di , del Águila Andrés Granados , Thu Ha Do T , Liu Sheng , Pei Jiajie , Xiong Qihua 
Published: March 2020

Abstract
Coulomb-bound electron-hole pairs (excitons) dominate the optical response of atomically-thin transition metal dichalcogenides (TMDs) semiconductors. The photoluminescence spectrum in W-based TMDs monolayers (i.e. WS2 and WSe2) at low temperature exhibits much richer features than Mo-based TMDs monolayers, whose origin is currently not well understood. Herein, by using near-resonant photoluminescence excitation spectroscopy, we probe the scattering events between excitons and phonons with large

k
ˆ

-momentum, which provides strong evidence for the momentum-indirect nature of the optical bandgap in monolayer WS2. The scattering between carriers and zone-edge phonons creates excitons at different valleys, among which, the lowest-energy is momentum-indirect. Our findings highlight that more efforts are required to solve the current debate on the inherent bandgap nature of TMD monolayers and the complex photoluminescence spectrum reported on W-based compounds.
Structural, morphological and optical characterization of Ti-doped ZnO nanorod thin film synthesized by spray pyrolysis technique
Authors: Rajasekaran M , Arunachalam A , Kumaresan P 
Published: March 2020

Abstract
Thin films of pure and Ti metal ion doped ZnO were grown on glass substrate by spray pyrolysis for various doping ratios keeping the temperature at 400 °C. Impact of Ti doping on morphological, optical and structural properties of ZnO was investigated. Structural confirmation of the thin-film was analyzed by using X-ray diffraction (XRD) studies and it concluded the successful growth of standard thin films of hexagonal wurtzite structure which was polycrystalline in nature. The morphological studies carried out using Scanning Electronic microscope (SEM), endorsed a uniform distribution of grain that are spherical in nature. Composition analysis by energy dispersive spectroscopy showed the presence of Ti, Zn and O in the films. Average grain size was estimated using Scherrer formula and obtained to be in the range of 35 to 50 nm. Atomic force microscopy was used to provide the surface roughness that had increased with the increase of Ti concentration. In the visible region, these films were found to be highly transparent and the average transmittance was obtained to be 85%. Photoluminescence spectral analysis showed a near band edge emission at 397 nm.
Effect of annealing process on the abnormal grain growth behavior during carburizing of 20CrMnTi steel
Authors: Jia Tao , Huang Jian , Wang Haojie , Wang Zhaodong 
Published: March 2020

Abstract
Abnormal grain growth (AGG) as an important physical metallurgical behavior is to be avoided during carburizing due to its adverse effect on properties such as fatigue, impact toughness and the quenching distortion. In this work, two types of annealing process which produce different morphology of precipitated particles were conducted to investigate its effect on the subsequent austenite grain growth behavior during carburizing of 20CrMnTi steel. Calculation from Humphreys’ model exhibited a good agreement with experimental observations, which indicates the large sized particle from high temperature annealing led to the locally insufficient pinning force for the blockage of grain boundary migration and is therefore responsible for the AGG. The isothermal precipitation kinetics for TiC particles is able to be described by the diffusional growth and LSW coarsening models with reasonable accuracy provided with the transition time from growth to coarsening stage. Design of microalloying and pre-treatment processing to suppress AGG can be assisted with the combinatory application of Humphrey’s model and precipitation kinetics model.
Synthesis of praseodymium-and molybdenum- sulfide nanoparticles for dye-photodegradation and near-infrared deep-tissue imaging
Authors: Wu Ye , Ou Pengfei , Song Jun , Zhang Ling , Lin Yingcheng , Song Pengfei , Xu Jian 
Published: March 2020

Abstract
Development of nanoparticles with multi-functionalities is of great importance. In this study, praseodymium sulfide (Pr2S3) and molybdenum sulfide (MoS2) nanoparticles were synthesized. The structural, morphological and optical properties of the as-obtained products were investigated by XRD, XPS, TEM, UV–vis-NIR spectroscopy, and photoluminescence spectroscopy. Pr2S3 is found to be used in selective photodegradation of fluorescein sodium salt. MoS2 can be utilized for selective photodegradation of rhodamine B. In the mixture of rhodamine B, fluorescein sodium salt and rhodamine 6 G, most of rhodamine B and part of fluorescein sodium salt are optically degraded by Pr2S3. In the mixture of rhodamine B, fluorescein sodium salt and rhodamine 6 G, part of fluorescein sodium salt and most of rhodamine B is degraded by MoS2. Moreover, they emit near-infrared fluorescence (800–1100 nm) when excited by the 785 nm light. Deep tissues imaging with high-contrast is shown, utilizing a nanoparticle-filled centrifuge tube covered with animal tissues (pig Bacon meat). Maximum imaging depth below the tissue surface of 1 cm is achieved. Our work provides a rapid yet efficient procedure to make nanoparticles for dual-application-potential in dye-photodegradation and near-infrared deep tissue imaging.
Gupta-Feynman based Quantum Field Theory of Einstein’s Gravity
Authors: Plastino A , Rocca M C 
Published: March 2020

Abstract
This paper is an application to Einstein’s gravity (EG) of the mathematics developed in (Plastino and Rocca 2018 J. Phys. Commun.
2, 115029). We will quantize EG by appeal to the most general quantization approach, the Schwinger-Feynman variational principle, which is more appropriate and rigorous that the functional integral method, when we are in the presence of derivative couplingsWe base our efforts on works by Suraj N. Gupta and Richard P. Feynman so as to undertake the construction of a Quantum Field Theory (QFT) of Einstein Gravity (EG). We explicitly use the Einstein Lagrangian elaborated by Gupta (Gupta, Proc. Pys. Soc. A, 65, 161) but choose a new constraint for the theory that differs from Gupta’s one. In this way, we avoid the problem of lack of unitarity for the S matrix that afflicts the procedures of Gupta and Feynman. Simultaneously, we significantly simplify the handling of constraints. This eliminates the need to appeal to ghosts for guarantying the unitarity of the theory. Our ensuing approach is obviously non-renormalizable. However, this inconvenience can be overcome by appealing tho the mathematical theory developed by (Bollini et al Int. J. of Theor. Phys.
38, 2315, Bollini and Rocca Int. J. of Theor. Phys.
43, 1909, Bollini and Rocca Int. J. of Theor. Phys.
43, 59, Bollini et al, Int. J. of Theor. Phys.
46, 3030, Plastino and Rocca J. Phys. Commun.
2, 115029) Such developments were founded in the works of Alexander Grothendieck (Grothendieck Mem. Amer. Math Soc.
16 and in the theory of Ultradistributions of Jose Sebastiao e Silva Math. Ann.
136, 38) (also known as Ultrahyperfunctions). Based on these works, we have constructed a mathematical edifice, in a lapse of about 25 years, that is able to quantize non-renormalizable Field Theories (FT). Here we specialize this mathematical theory to treat the quantum field theory of Einsteins’s gravity (EG). Because we are using a Gupta-Feynman inspired EG Lagrangian, we are able to evade the intricacies of Yang-Mills theories.