bluuebunny/crossref_metadata_2025 huggingface dataset:
Multipole analysis of periodic array of rotated silicon cubes
Authors: Terekhov P. D. , Evlyukhin A. B. , Karabchevsky A. , Shalin A. S.
Published: April 2020

Dielectric nanophotonics is the modern and very relevant field of optics. In this work we use the recently reported Cartesian multipole decomposition approach for all-dielectric metasurfaces [1] to study optical properties of the silicon metasurface at the nanoscale. This metasurface consists of crystalline silicon cubes rotated by 45° around the axis perpendicular to the surface plane. We use numerical modeling and semi-analytical approach to find origins of the scatering by the considered metasurface. Results obtained with the multipole approach are in the good agreement with the direct calculations of transmission and reflection spectra. Insights from our study can be widely used to design novel metasurfaces and metadevices and tune their optical properties to achieve a needed functionality.
Purcell effect control in active silicon dielectric nanoantenna for the near-IR wavelength range
Authors: Yaroshenko Vitaly , Larin Artem , Ageev Eduard , Zuev Dmitriy
Published: April 2020

Nowadays active light-emitting dielectric nanophotonics is one of the most rapidly developing research field. These nanosystems make possible to direct emission of a light source placed inside nanoantenna in the specific direction with low-losses. Here we study the application of silicon for the creation of active all-dielectric nanoantenna emitting at the telecommunication wavelength (1540 nm). We numerically calculate Purcell factor in silicon nanoparticles (spherical and cylindrical) and demonstrate that in these nanostructures Purcell factor value can be enhanced by two orders of magnitude for this wavelength. The obtained data can be applied for the creation of active silicon nanoantenna doped with erbium for perspective light emitting metasurfaces.
All-Dielectric Optically Tunable Metasurface for Terahertz Phase and Amplitude Modulation
Authors: Lepeshov S , Gorodetsky A
Published: April 2020

The novel concept of an all-dielectric terahertz metasurface for amplitude and phase modulation is proposed. The results of numerical simulation of transmittance and phase shift of a broadband input THz signal are presented. The change of the amplitude and phase characteristics of the metasurface under the laser irradiation of the metasurface is shown. The phase modulation from 0 to π/2 is numerically observed. Our results pave the way for experimental realization of metasurface-based THz tunable modulators for cutting edge THz devices.
Induced neural stem cell differentiation on a drawn fiber scaffold—toward peripheral nerve regeneration
Authors: Keshavarz Meysam , Wales Dominic J , Seichepine Florent , Abdelaziz Mohamed E M K , Kassanos Panagiotis , Li Quan , Temelkuran Burak , Shen Hongxing , Yang Guang-Zhong
Published: April 2020

To achieve regeneration of long sections of damaged nerves, restoration methods such as direct suturing or autologous grafting can be inefficient. Solutions involving biohybrid implants, where neural stem cells are grown in vitro on an active support before implantation, have attracted attention. Using such an approach, combined with recent advancements in microfabrication technology, the chemical and physical environment of cells can be tailored in order to control their behaviors. Herein, a neural stem cell polycarbonate fiber scaffold, fabricated by 3D printing and thermal drawing, is presented. The combined effect of surface microstructure and chemical functionalization using poly-L-ornithine (PLO) and double-walled carbon nanotubes (DWCNTs) on the biocompatibility of the scaffold, induced differentiation of the neural stem cells (NSCs) and channeling of the neural cells was investigated. Upon treatment of the fiber scaffold with a suspension of DWCNTs in PLO (0.039 g l−1) and without recombinants a high degree of differentiation of NSCs into neuronal cells was confirmed by using nestin, galactocerebroside and doublecortin immunoassays. These findings illuminate the potential use of this biohybrid approach for the realization of future nerve regenerative implants.
Evaluating CMIP6 model fidelity at simulating non-Gaussian temperature distribution tails
Authors: Catalano A J , Loikith P C , Neelin J D
Published: April 2020

Under global warming, changes in extreme temperatures will manifest in more complex ways in locations where temperature distribution tails deviate from Gaussian. Confidence in global climate model (GCM) projections of temperature extremes and associated impacts therefore relies on the realism of simulated temperature distribution tail behavior under current climate conditions. This study evaluates the ability of the latest state-of-the-art ensemble of GCMs from the Coupled Model Intercomparison Project phase six (CMIP6), to capture historical global surface temperature distribution tail shape in hemispheric winter and summer seasons. Comparisons with a global reanalysis product reveal strong agreement on coherent spatial patterns of longer- and shorter-than-Gaussian tails for both sides of the temperature distribution, suggesting that CMIP6 GCMs are broadly capturing tail behavior for plausible physical and dynamical reasons. On a global scale, most GCMs are reasonably skilled at capturing historical tail shape, exhibiting high pattern correlations with reanalysis and low values of normalized centered root mean square difference, with multi-model mean values generally outperforming individual GCMs in these metrics. A division of the domain into sub-regions containing robust shift ratio patterns indicates higher performance over Australia and an overestimation of the degree to which tails deviate from Gaussian over southeastern Asia in all cases, whereas model skill over other regions varies depending on season and tail of the temperature distribution. For example, model performance during boreal winter indicates robust agreement (>85% models) with reanalysis for shorter-than-Gaussian warm tails over the Northern Hemisphere, whereas cold-tail shape is generally mischaracterized by GCMs over western Russia. Although there is spatial and model variability, overall, results highlight the capability of the CMIP6 ensemble in capturing seasonal temperature distribution deviations from Gaussianity, boosting confidence in model utility and providing insight into the complexity of future changes in temperature extremes.
Utilization of fermented rice straw biomass and soybean oil supplementation on digestibility, efficiency, and the bodyweight of local sheep
Authors: Hafid H , Patriani P
Published: April 2020

Improvement of the quality of rumen food must be supported by improvements that support bioprocess in the rumen because rumen is the largest part of the digestive system of ruminants. Nutrition addition is a must if the ration used is fibrous waste such as fermented rice straw. Feed processing technology must be integrated with the nutrient addition of microbial biomass synthesis precursors, such as nitrogen, sulfur, macro minerals and energy, and long-chain fatty acids. This research was conducted to evaluate the utilization of fermented rice straw biomass using soybean oil addition on digestibility, feed efficiency and daily gain in local sheep. Eighteen, male local sheep aged 6-8 months with an average live weight of 22.31 ± 2.20 kg, were fed with 15% rice straw and 85% concentrate as the basic feed. The study was conducted with an experimental method in vivo. The adaptation period was carried out for 2 weeks, preliminary for 21 days and a collection period of 5 days using individual cages. Three diet treatments were supplemented control 0% (R1), supplement with 3% soybean oil (R2) and supplement with soy oil 6% (R3) of total dry matter intake. The parameters measured were dry matter digestibility, organic matter, and daily gain. Based on the results of the study it can be concluded that the addition of 6% soybean oil in the sheep feed, with the balance of 15% fermented rice straw and 85% concentrate did not affect and interfere with the digestibility of dry matter and organic matter, and did not significantly influence the daily gain and efficiency of sheep feed.
Formulation of alternative demulsifiers with palm oil based surfactants for crude oil demulsification
Authors: Saputra Fajar Bagas , Fujita Haruhiro , Hambali Erliza
Published: April 2020

Palm oil-based surfactants were used to formulate demulsifiers for crude oil demulsification as alternatives to petroleum-based surfactants. A light crude oil sample obtained from x field crude oil well contained 0.713% (w/w) asphaltene and 25.75% BS&W. The formulation of demulsifiers was carried out by the selection of a primary surfactant from Sodium Methyl Ester Sulfonate (SMES) and Diethanolamide (DEA), and the concentration of co-surfactant addition. The best formulation was SMES as a primary surfactant with the addition of a 10% DEA co-surfactant. The best solvent was the solution of toluene and xylene (1:1). The temperature treatment of 80 °C separated 100% water from crude oil emulsion and decreased BS&W to 5.45%.
Synthesis of potassium methyl ester as foaming agent
Authors: Rizka Fauzan Putra , Fujita Haruhiro , Hambali Erliza
Published: April 2020

Forest and land fires in Indonesia have been historically causing extensive damages and losses on economies, ecosystems, and environment, and affects all life in the region. Forest fire management in Indonesia still relies on water that is less effective than foaming agents i.e., extinguishers. Chemicals used in conventional extinguishers are expensive. Foaming agents based on palm oil can be used as an alternative for the extinguishers. The foaming agent synthesized in this study was potassium methyl ester, made from palm oil methyl ester (ME), with saponification by adding potassium hydroxide (KOH). The forming performance tests (foam stability and forming ability) and form related physicochemical analyses (surface economies, interface surface tension, density, and contact angle) of potassium methyl ester were conducted with ME:KOH molar ratio of 1:1; 1:1.25; and 1:1.5 and the saponification duration of 1.5, 2 and 2.5 hours. The molar ratio had significant effects on foam stability, interface surface tension, density, and contact angle. The duration of the saponification had a significant effect on density. There was no significant effect of the interaction between the molar ratio and saponification duration. The best foaming agent selected by the ranking method (composite performance index) of foam stability, foaming ability, and surface tension were one with ME:KOH molar ratio of 1:1 and 1.5 hours saponification.
Final report on the pilot plant operation for supercritical water gasification of wet biomass
Authors: Matsumura Yukihiko , Inoue Shuhei , Inoue Takahito , Kawai Yoshifumi , Noguchi Takashi , Tanigawa Hiroaki
Published: April 2020

Supercritical water gasification has been developed as gasification technology for wet biomass. This is because the reaction takes place in water, and drying pretreatment is not needed. So far, production of gas and utilization of this producer gas has been discussed. However, devices to use gas such as gas engine or fuel cell are expensive. One possibility is to use heat as final product. To examine the possibility to use heat from supercritical water gasification, the pilot scale plant located in Chugoku Electric Power Co., Inc. was modified, and heat recovery experiment was conducted. To avoid the char production, addition of radical scavenger was also tried. Heat recovery with the efficiency of 24.7 % was achieved and DSS operation for 147 h 30 min in total was successful.
Molecular functional group and optical analysis on chlorophyll of green choy sum and cassava leaves extracts
Authors: Palupi Endah Kinarya , Nazopatul P H , Umam Rofiqul , Bibin Andriana B , Sato Hidetoshi , Alatas Husin , Irzaman
Published: April 2020

Recently, chlorophyll can improve the optical characteristics of thin films. The role of chlorophyll is a dopant in the thin film. Chlorophyll is very good in transferring electron which is strongly related to energy. If the energy gap of the film is low, the characteristics of the film are better because it requires less energy to jump one electron from the valence band to the conduction band. However, an important factor to consider in this case is the chlorophyll content. The more chlorophyll content will improve the light absorption rate. This study examined the characterization of chlorophyll of green choy sum and cassava leaves extracts. The analysis was carried out based on the Fourier Transform Infra-Red (FTIR) and UV-Vis Spectrophotometer. The results of the analysis were molecular functional groups, vibration frequencies, bond force constants between molecules, optical characteristics and chlorophyll content on both of chlorophyll extracts.
Mechanical and flame-retardant properties of oil palm empty fruit bunches
Authors: Riza Okta , Nikmatin Siti , Hendradi H , Firda AS
Published: April 2020

In this work we studied the mechanical and flame retardant properties of Oil Palm Empty Fruit Bunches (OPEFB). Currently, the use of OPEFB waste in Indonesia is not optimal and the amount of the waste continues to increase every year. In this study, we optimized the flame retardant properties of non-woven OPEFB fibers. The OPEFB fiber was modified by making it non woven and treated in situ by immersing it with a mixture of NaOH and CaCl2 solution (flame retardant-1 treatment) and also a mixture of KOH and CaCl2 solution (flame retardant-2 treatment). In addition, the treated fibers were investigated for surface morphology and tested for thermal and tensile strength tests. Provision of flame retardant treatment in non woven fibers can improve flame retarding and mechanical properties. The objective of this study was optimization of flame retardant treatment of OPEFB. Non woven fiber which was treated with the first flame retardant with a concentration of 3 M did not burn for 12 seconds. The vertical flame test showed that the burning time until the fiber runs out was slowed to 39 seconds. Fibers treated with NaOH and CaCl2 with 3 M concentration also had the best tensile strength values of 8.13 MPa. In the morphology test, non-woven fibers with the first flame retardant treatment were better than non woven fibers with the second flame retardant treatment.
Biomass (rice husk) as a fuel for sterilizing oyster mushrooms: a case study of fuel efficiency comparison, temperature distribution and production effectiveness
Authors: Abdurrahman  , Irwansyah R F , Umam R , Syazali M , Junaidi R , Palupi E K , Irzaman
Published: April 2020

The study on the efficiency of biomass fuel (rice husk) was carried out in the sterilization of oyster mushrooms by using drums as sterilization media and convection pipes as accelerators for heat transfer throughout the sterilization chamber. Variations in diameter and number of convection pipes were used as a comparison in this study. The measurement of thermal temperature was carried out using a thermo laser. In addition, the interpretation of the thermal distribution of the room was analyzed using Surfer software that was performed as a comparison between the number and diameter of convection pipes and determining the distribution of temperature using numeric interpolation. The use of oyster mushroom production using convection pipes 1 rod with a diameter of 8 cm showed the best results, temperature distribution, the efficiency of fuel use in this study. In addition, the comparison of the number of pipes also proved that convection pipes have a temperature distribution that is more equivalent to the number of convection pipes 3 rods. However, the efficiency in the use of fuel using convection pipes 1 rod with a diameter of 6 cm showed a better value than the other.
Cover Crops and Frond Piles for Improving Soil Water Infiltration in Oil Palm Plantations
Authors: Agusta H , Handoyo G C , Sudaryanto M T , Hendrayanto
Published: April 2020

Oil palm plantations may cause problems in the hydrological cycle due to a low soil water infiltration capacity. In this study, we (a) compared oil palm plantations with other land use types, and (b) within oil palm plantations, analyzed whether legume cover crops and the deposition of frond piles can change soil water infiltration. The study was conducted in the lowlands of Sumatra in mixed jungle rubber stands, and in monospecific rubber and oil palm plantations by using ring in filtrometers. Observed in filtration rates in jungle rubber and monospecific rubber stands (approximately 20 cm h−1) were about 5 times higher than in oil palm plantations, underlining the problem. Within the oil palm cultivation system, a legume cover crop, as well as the deposition of palm fronds, significantly enhanced infiltration rates. We conclude that indeed low soil water infiltration is very low in conventional oil palm plantations. Management including the planting of cover crops and deposition of fronds may offer options for improving the situation.
Numerical Simulation of Flow Characteristics of Particle Agglomerates in Desulfurization Tower
Authors: Xu Chunxing
Published: April 2020

In this paper, the gas-solid two-phase flow in a multi-stage spouting desulfurizer is simulated by using large eddy model and viscous particle dynamics theory. The simulation results show that the agglomeration velocity and concentration of particles in the first-order tower are high, while the agglomeration velocity and concentration of particles in the second-order tower are low. Moreover, the results show that the particles form a stable fluidization in the tower, showing a typical flow distribution trend of the ring core and realizing a stable internal circulation. In this paper, the influence of inlet gas velocity and mass flow rate on the internal circulation of desulfurization tower are also analyzed.
International Rare Earth Supply and Demand Forecast Based on Panel Data Analysis
Authors: Guangli YAN , Zhongxue LI
Published: April 2020

Rare earth supply and demand forecasting plays a crucial role in the development of the rare earth industry, but there are some problems in common prediction methods, such as big error and insufficient authenticity. Through the use of panel data analysis methods to predict and analyze international rare earth supply and demand can greatly improve the authenticity and reliability. Spatially analyze the positive correlation between international rare earth supply and national GDP, rare earth production, and rare earth imports, while negatively correlated with the price of rare earth. From the time analysis, the international rare earth consumption presents the general trend of decline. At the same time, the supply and demand forecast of rare earth in China is analyzed and compared and strive to provide an important reference for the comprehensive development and utilization of rare earth resources in China through the analysis of panel data.
Modeling and Simulation Active Vibration Control of Flexible Solar Wing Support Structure
Authors: Zhang Pengwei , Li Yinghao , Hu Haichen
Published: April 2020

In this paper, the flexible solar wing support structure is taken as the research object, and the vibration is actively controlled by the piezoelectric material. In this paper, the Euler-Bernoulli beam theory is used to simplify the overall model structure. The principle of Language and the hypothetical modal method are used to derive the dynamic model of the piezoelectric flexible system. The obtained system dynamics model was simulated by PID control, and good results were obtained.
Research on Residual Value Evaluation of Battery Electric Vehicles Based on Replacement Cost Method
Authors: Li Hongwei , Chen Chuan
Published: April 2020

Knowledge about the value of used battery electric vehicles (BEVs) is critical for potential BEV purchasers, corporations, and governments to consider the total cost of ownership for BEVs. This study introduces a new method to evaluate the residual value of BEVs in China and provides the evaluation results. We innovatively separate the power battery from the battery electric vehicle and apply big data analysis methods to research the residual value of these two parts. We find that with the improvement of the power batteries technology, the residual rate of power batteries is higher than that of vehicles. However, whether or not to get subsidies has a great impact on the value residual rate of vehicle, we also find that at present BEVs still cannot develop independently without subsidy in China, because the low value residual rate will affect consumers’ purchase decision.
A new method for charging and repairing Lead-acid batteries
Authors: Sun R L , Hu P Q , Wang R , Qi L Y
Published: April 2020

With the rapid development of China’s electric vehicle industry, the demand for vehicle-mounted lead-acid batteries is increasing, and higher requirements are put forward for their safety and reliability. There are some problems in lead-acid batteries, such as short service life and decreasing capacity. In this paper, a new method of charging and repairing lead-acid batteries is proposed. Firstly, small pulse current is used to activate and protect the batteries in the initial stage; when the current approaches the optimal current curve, the phase constant current charging is used instead, when the voltage is low. When the value is in stable state, the polarization and vulcanization phenomena of batteries in the earlier stage can be eliminated by using the composite resonant pulse repair technology. When the vulcanization and polarization phenomena are eliminated successfully, the REFLEXYM charging method is carried out immediately to protect the batteries, and the batteries can be controlled by intermittent charging at this stage. The phenomenon of temperature rise is helpful to prolong the life of the battery. Finally, it enters the floating charging stage, providing a very small trickle current to compensate for the self-loss of the battery, so that the battery can remain fully charged.

This new charging and repairing method can not only eliminate the polarization and vulcanization of the battery, but also control the temperature rise of the battery, which can extend the service life of the battery. This paper gives the specific methods to solve the polarization and vulcanization of batteries and the working principle of each charging stage.
Finite Element Analysis of Marine Weapon Lift Based on ANSYS
Authors: Su Wanshan
Published: April 2020

In order to improve the dynamic characteristics of a shipborne weapon elevator and reduce the adverse effects of harmonic vibration on the elevator under sea conditions, the finite element model of weapon elevator is established by ANSYS/Workbench, and the modal analysis, harmonic response analysis and static strength analysis of the elevator under dynamic load are carried out. The analysis results are obtained: The harmonic frequency is far less than the first natural frequency of the elevator under the external sea condition, so the system will not suffer from resonance damage and meet the strength requirements; the external excitation frequency of the elevator should be avoided from 20 to 40 Hz, and the deformation of the side plate in motion is the largest, but within the control range, it does not affect the docking of adjacent components. Improvement measures are put forward to increase safety factor and anti-vibration ability.
Research on the relationship between the cost of power cable project and the periodic change of macroeconomic index
Authors: Wang Hanze , Ma Xin , Huang Kai , Liu Jinpeng
Published: April 2020

Cable line engineering is an important part of the transmission network. With increased urban development and the improvement of transmission lines, the investment scale is expanding. HP filter that is improved using the multifractal detrended fluctuation algorithm is used to analyze the periodic characteristics between the comprehensive cost index and macroeconomic indicators. And through the comprehensive cost index to optimize the accuracy of sample data. It is found that the fluctuation inflection point of power cable engineering’s comprehensive cost index is 0.5-0.7 years slower than those of the CPI and PPI. This research conclusion provides theoretical support for optimizing the calculation method of the driving factors of power grid project costs, the scientific analysis of power grid project cost trends, and rational investment planning.
Study on the relationship between mucilage cells and low temperature tolerance of Sedum aizoon L.
Authors: Zhang Ruijie , Chen Yan , Yang Luxi , Xie Yongdong , Yan Wenyi , He Zhongqun
Published: April 2020

Mucilage cells were generally distributed in the vegetative organs of dicotyledons. We tried to analyse the relationship which was unknown between mucilage cells and the frost resistance by plant tissue staining technique, semi-lethal temperature and freezing injury index in Sedum aizoon L.The results showed that the number of mucilage cells was significantly larger than control group in the leaves and stems with experimental group. The semi-lethal temperatures were -3.34°C and <-5°C, respectively, when the aboveground parts grew at 25°C and 5°C. Further, the freezing injury investigation was consistent with the above results, indicating the close relationship between mucilage cells and the frost resistance in aboveground parts of Sedum aizoon L.
IoT based service cloud design for distributed generator sets
Authors: Shi Yuanqiang , Zhao Rongyong , Chen Hong , Wu Xuekui , Wang Yan , Liu Qiong
Published: April 2020

To satisfy the technical requirements of life-cycle service of the distributed generator sets(GenSet) during the after-sale stage, this paper proposes a service cloud architecture based internet of things (IoT) technology. This service cloud consists of generator set remote control, maintenance and repair, even the health management. It has the characteristics of simple architecture, physical and material connection, safety and reliability, and cost-effective. This service cloud can be implemented on a private cloud system or a public cloud system. At the same time, this GenSet service cloud can fully play the role of IoT technology, information technology, etc. in improving the efficiency of traditional manufacturing industry. Through the real-time monitoring of the GenSet, this cloud can timely sample and master the global operation of the GenSets, scientifically and reasonably evaluate the safety, reliability and quality of the GenSets, timely respond to and dispose of all kinds of operation alarms. Through the maintenance management of the GenSets, this cloud can effectively save and manage the maintenance account of the whole life cycle of the GenSets. Through the service dispatch, this cloud can shorten the distance between the customer and engineer and optimize the resource allocation.
Data Fusion Algorithm of Power Line Carrier Communication Based on Minimum Spanning Tree Theory
Authors: Lu Hai , He Ziyang , Pen Haibo , Yang Ting
Published: April 2020

With the expansion of the clean energy photovoltaic power generation systems, the requirements of communication and data exchange capacity become higher and higher. The status information of each photovoltaic unit should be collected. However, when the number of PV units is too large or the collection frequency is too high, it will generate huge amount of data to the communication system. If each monitoring terminals transmits the data to the master station independently, the huge traffic flows occupy bandwidth and reduce the communication efficiency, which also affect the real-time monitoring of the photovoltaic system. To solve this problem, this paper proposed a novel data fusion algorithm for power line carrier communication based on minimum spanning tree transmission path. The data fusion packet format is also presented. Finally, the effectiveness of the proposed algorithm is proved by comparing the amount of data brought by the fusion algorithm and the non-fusion algorithm.
Influence of thrust fins on hydrodynamic performance of pod propeller
Authors: Yao Zhenqiu , Liu Wenyu , Xu Zhirong , Ling Hongjie
Published: April 2020

Based on the viscous flow theory, the influence of the arrangement and geometrical changes of the thrust fins on the hydrodynamic performance of the pod propeller is studied by using the sliding grid technology and the commercial fluid calculation software FINE / marine.The results show that the extension of the thrust fin can slightly increase the resistance performance and propulsion efficiency of the pod propeller while significantly reducing the lateral force of the pod.Changing the circumferential position of the thrust fin can change the magnitude and even the direction of the total lateral force of the nacelle without affecting the resistance of the propeller. The thruster is the most efficient when the circumferential angle of the thrust fin is 60 degrees.When the initial angle of attack of the fin is in the range of -4 to 8, the angle of attack is larger, the efficiency of the thruster is higher, the total lateral force is smaller, and the cabin resistance is smaller. However, after the angle of attack is greater than 4 degrees, the cabin resistance is no longer reduced.
Seasonal Variation Mechanism of PHC Content in the Surface and at the Bottom
Authors: Yang Dongfang , Li Haixia , Ren Haoyuan , Zhang Longlei , Wang Qi
Published: April 2020

Based on the survey data of Jiaozhou Bay in 1992, the vertical distribution and seasonal variation of PHC in surface and bottom waters of Jiaozhou Bay were studied, and the seasonal distribution, variation range and horizontal distribution trend of PHC content in the surface and bottom waters were determined. The results showed that PHC content in the surface and at the bottom of the whole water body from central Jiaozhou Bay to the northern part of the bay mouth of Jiaozhou Bay in May ranged from 0.006mg/L to 0.070mg/L, which constituted a slight pollution there. In August and October, PHC content in the surface of the water body of Jiaozhou Bay ranged from 0.019mg/L to 0.075mg/L, which didn’t constitute pollution; PHC content at the bottom of the water body of Jiaozhou Bay ranged from 0.007mg/L to 0.047 mg/L, which didn’t constitute pollution. From May to October, the level of PHC content in the surface of the water body of Jiaozhou Bay from low to high respectively appeared in the summer, the spring and the autumn; The level of PHC content in the bottom waters of Jiaozhou Bay from low to high respectively appeared in the summer, the autumn and the spring. The seasonal variation mechanism of PHC content showed that the PHC content in the surface was not subject to season but PHC content in the sources, and PHC content at the bottom was not subject to season but the accumulation and dilution effect of the PHC descending from the surface to the bottom. In terms of the scale of variation, the variation range of PHC content in surface and at the bottom of the waters in Jiaozhou Bay in May, August and October were basically the same. Moreover, the level of PHC content in the surface was relatively high and that at corresponding bottom was relatively high; the level of PHC content in the surface was relatively low and that at corresponding bottom was relatively low. In terms of the spatial scale, the horizontal distribution trend of PHC content respectively in the surface and at the bottom of the whole water body from central Jiaozhou Bay to the northern part of the bay mouth of Jiaozhou Bay in May, August and October were same. Moreover, the horizontal distribution trend of PHC in the surface and at the bottom were same when there was transportation of PHC from any source.
The Effect of the Insertion Method of Network Video Advertisements on Consumer Purchase Intention
Authors: Lei Hongzhen , Chen Xiaoli
Published: April 2020

The SOR theory and structural equation model are used to analyze the influence of three kinds of insertion methods of online video advertisements on consumers’ purchase intention. Research shows that video implantable advertisement have the most significant impact on consumer pleasure, and network video patch advertisement have the most significant impact on consumer arousal. Through comparative analysis of the three, it provides practical guidance for video platforms or advertisers to more accurately select the way to advertise and then maximize the effectiveness of advertising.
Analysis on Nanorobot Based on Bacterial Propulsion Method
Authors: Ma Yun
Published: April 2020

Nanorobots have shown great potential in medical applications in vivo. Ingenious propulsion methods of nanorobots are significant for saving energy and accomplishing the difficult and complicated tasks. Considering variable ambient conditions inside human body, devices for propulsion methods are able to sustain in different environments. Bacterial propulsion method is one of the popular propulsion methods. Nanorobots are attached to bacteria which will carry them into the specific places in body. The in vitro experiments based on bacterial propulsion in recent ten years will be generalized and discussed here. It has proved that it is feasible to combine nanorobots with bacteria and this combination is steady. This paper aims to introduce bacterial propulsion method, which is one of propulsion methods with high efficiency, good biocompatibility and controllability.
Environment of Internet Marketing and Experiential Marketing in Indonesia Context: Small and Medium Enterprises (SMEs) Purchase Intentions
Authors: Nasution Muhammad Irfan , Prayogi Muhammad Andi , Siregar Lukman Hakim , Suryani Yani , Hernawaty
Published: April 2020

The strategies to employ Internet Marketing and Experiential Marketing by Small Medium Enterprises (SMEs) used to increase purchase intention. Therefore, this research aimed to analyse the partial and simultaneous influences between Internet Marketing and Experiential Marketing to purchase intentions. This research used a quantitative approach and took the samples by using a quota sample technique with 100 respondents from Small and Medium Enterprises on Fashion and Food sector in Medan City. The technique of analyzing the data used in this research was multiple linear regression. The result of this research was Internet Marketing, and Experiential Marketing had a positive and significant influence on purchase intention. Simultaneously, Internet marketing and Experiential Marketing had a positive and significant impact on purchase intention. The implication of this research was SMEs must transform from the conventional strategy into an online strategy.
CBR Laboratory Analysis for Determining The Number of Compaction Tracks to Achieve Field CBR
Authors: Srihandayani Susy , Soehardi Fitridawati , Putri Lusi Dwi
Published: April 2020

Compaction is the process of grounding the soil by removing air from the pores of the soil mechanically (beaten, crushed and so on) Compaction is carried out with the aim of improving the technical properties of the soil, namely obtaining the densest soil conditions (maximum solid state). In the process of compaction water content also plays a significant role to achieve maximum density value. Water is a lubricant for the soil to help unify the aggregate and remove air in the compaction process. From the results of compaction in the laboratory can be seen how much compaction energy is given and optimum water content (Wopt) to achieve maximum compaction. From the results of compaction in the laboratory can be applied for maximum compaction in the field, from the calculation of compaction energy in labour from the hammer weight of 4.5 kg, 45.7 cm falling height, g = 10 m/s2. The compaction energy is 1134 kg.m/s2. To get the number of compaction paths needed to achieve maximum compaction can be determined from the equipment used, the amount of energy used as an example of a vibro roller capacity of 10500 kg, get the solidification energy 164.1 (kg.m2/s). So the trajectory required vibro roller tool as much as seven trajectories.
The Use of Wind Rose to Improve the Quality of Site Analysis
Authors: Sundari Titin , Samra Boby , Saptono Agus Basri
Published: April 2020

Site analysis is the first step of building and environmental planning and design, which has to be done to get the aim of the design. There are many factors that should be analyzed in that step, and the wind, as one of the climate factors, is one of them. The importance of wind analysis is to formulate the concept of building façade and landscape, as well as building structure. This paper will concentrate on the first one. To formulate the concept of building and landscape, architects should know about wind, its types and categories. Designers commonly use wind data in a simple manner in their analysis. The need to enhance the quality analysis is urgent, which can be done by utilizing a wind rose diagram. Generating a wind rose diagram can be either manually or by using software. Several freeware can be obtained from the internet. The method used in this paper is the implementation of freeware called WRPLOT View Version 8.0.0., which depicts the wind direction and speed in a specific location and period of time. This paper will present how to produce a wind rose diagram by taking a sample wind data of Pekanbaru, Indonesia, which were obtained from Meteorology, Climate and Geophysics Board (BMKG) Riau Province. Analyzing the wind using wind rose diagram to produce the concept of building façade and landscape is a significant effort in improving the quality of analysis. Wind analysis using simple data, which usually contains incomplete information, gives less optimal results. It could be sufficient when it is applied in a small simple building plan, but neither in larger project nor in climate-related architectural project such as tropical and bio-climatic architecture. By using the wind data from wind rose graphic, in which the information is more complete, the quality of analysis will be improved. Finally, the author will show a simple example on how to implement wind rose in site analysis.
Young Entrepreneurs Environment Development: Analyzing the Effectiveness and Strategic Design
Authors: Hardi  , Maryanti Sri
Published: April 2020

The purpose of this research is to know what the right effectiveness and strategy for analyzing Cooperative Academic Education Program (Co-Op) at Lancang Kuning University. To analyze the effectiveness and Strategic Cooperative Academic Education (Co-Op) in creating self-employed entrepreneurial students and motivate by using Qualitative Descriptive Method. Qualitative data analysis method is used to answer some questions by analyzing, one of them is the effectiveness analysis and strategy to create independent entrepreneur of Cooperative Academic Education (Co-Op) program. The results of the research showed that integrated Working Learning (Co-Op) is very necessary for all universities This condition can be read as an acknowledgment in which the agenda to move forward the nation cannot be done partially. There must be a continuous synergy of both the business world and the world of MSMEs, Coop program implemented for 2 years is consecutively considered effective. This can be seen from the achievement of effectiveness indicators Coop program at Unilak and to create self-employed young entrepreneurs from Lancang Kuning university students has self-employed entrepreneurs strategy.
The Pelalawan Royal Palace Architectural Design: Exploring the Environmental Values and Symbols in Riau Province
Authors: Silva Hendri , Sudarmin
Published: April 2020

Istana Sayap is a royal palace of Pelalawan that once stood on the side of Kampar River, Riau. This palace has symbolic values that are inherent in order of the environment and its architecture. Even the palace is already gone and has been replaced with the new ones, but the values and its symbols are still unspoiled. In addition, the symbol values that show local wisdom are also found in the environment of Pelalawan. Something that been showed by the future generations. This research is used to find values on wing palace contained in its architecture and environment. This value will be basis for future development of Pelalawan and also in other Riau region.
User-friendly Technology at PT PLN (Persero) Pekanbaru: OE Analysis on Procurement of Goods and Services
Authors: Nasution Nurliana , Choiriah Wirdah
Published: April 2020

Nowadays, the development is more likely to have user-friendly technology, which means that it is easier for someone to do any activity. PT PLN (Persero) Pekanbaru utilizes information technology in the field of procurement of goods and services. The initial stage in the procurement of goods and services is to make an Owner Estimate (OE) analysis. In determining OE, procurement executives must have price references that can be obtained from market prices. The prototype method is a new paradigm in software development. In the prototype/ prototyping method, the resulting software is then presented to the client and the client is given the opportunity to provide input and criticism. The performance achievement of procurement of goods and services in semester 2 of 2017 for OE manufacturing activities at PT PLN (Persero) Pekanbaru is equal to 116% of the 100% target. After the implementation of the OE application in the first semester of 2018 was carried out, the performance of the procurement of goods and services in OE manufacturing activities increases to 120% of the 100% target. By the implementation of the OE application, the performance of the procurement of goods and services has increased from 116% to 120% of the target in OE manufacturing activities.
Differences in The Spreading Temperature Between the Grained Buton Bitumen with the Penetration Asphalt 60/70
Authors: Soehardi Fitridawati , Putri Lusi Dwi , Srihandayani Susy
Published: April 2020

The need for asphalt in Indonesia is so high that every year it has to import asphalt oil around 600,000 tons. The amount of imported oil asphalt can certainly be reduced by the optimum utilization of asbutons. This research study was to determine the influence of temperature differences at the time of the finisher Asphalt Concrete mix asphalt - Binder Course (AC-BC) field with the use of grained Buton Asphalt and bitumen 60/70 penetration, using local aggregate in asphalt mixtures Asphalt Concrete - Binder Course (AC -BC). The method used is a survey of direct sampling to the field. Temperature measurement data is taken on asphalt mixture in asphalt finisher before compacted. Temperature data collection is done for Asphalt Buton Grain type 5/20 and asphalt penetration 60/70 then calculated decrease happened and long time required asphalt carrier vehicle from asphalt mixing plane to the location of an overlay. So we get the difference of temperature decrease. The result showed that the temperature decrease on the asphalt of grain buton was increased, compared to the asphalt mixture using liquid asphalt with approximate time ± 5 hour trip from asphalt mixing plane to location. So it needs special handling in the field implementation to cope with rapid temperature decline.
Environment Lighting System Evaluation: Lancang Kuning University Context
Authors: Situmeang Usaha , Setiawan David , Monice
Published: April 2020

Street lighting lighting becomes a necessity for road users, including road users within the University of Lancang Kuning. The teaching and learning process at night makes the street lighting system as a must for the campus. Evaluation of the existing lighting system to obtain solutions and recommendations later. From the results of data collection and lighting density simulation, it is found that the commonly used lamps are a 500W white heart / bulb lamp that is directly proportional to the area of the 250W yellow Son-T light bulb. The difference is that the 500W white bulb has a very bright spot of lighting under the lamp, while the 250W yellow Son-T is almost uniformly illuminated even under the lamp itself. Lamp height does not significantly affect the expanse of the lighting, as evidenced by comparing the height of 8 meters and 4 meters from the road surface there is a difference of area + 12.5%. The maintenance and planning of the street lamps in Unilak is also not very good where at point A lights self-supporting lighting area has been entered in the enrichment area of the parabolla single street lights so as not to affect the expanse of lighting, then light bulbs and the non-functioning of street lights at other locations.
Document Management System and Reminder using SMS Gateway
Authors: Haryanti Tining , Winarno
Published: April 2020

This research is an observational research using descriptive analysis on rural areas that have little technological exposure to support social welfare, especially for baby. The lack of good documentation in social facility services for baby, especially on immunization has cost failure in meeting local government program’s standard. This has led to suboptimal health care for baby. Another impact is that repeat immunization will not be effective for the social services themselves as there are no sufficient & reliable records. The information regarding to the implementation of health care for baby has failed to reach sizeable part of the society. As a result, many people are still not yet well-informed with the service schedule or types of the immunization suitable for their baby. This research Is done in ABC village through data collection in forms of observation, interviews and documentation. With the existence of document management system and reminder using SMS as to leverage health care for baby, it is expected that government program in terms of social health care especially for baby can be implemented optimally.
The Strategy Determination to Improve Marine Security Using SWOT-AHP
Authors: Sathasivan  , Buhari  , Lumaksono Heru , Tukan Marcus
Published: April 2020

The high number of crimes and violations occurring in the Indonesian sea shows that marine security in Indonesia is still weak. To improve maritime security requires planning a good maritime security strategy by analyzing strengths, weaknesses, opportunities and threats. This study aims to determine the best strategy to improve marine security in Indonesia. Therefore, in this study, the combination of SWOT and AHP methods was used to compare the best alternative strategies.The results of the combination of the SWOT and AHP methods recommend the following decisions: First is the strength-opportunity strategy (SO) with a value of 0.51, namely by utilizing all the power to seize and take advantage of the opportunity as much as possible, the SO strategy uses the internal strengths of the agency to take advantage of external opportunities. Second is the strength-threat strategy (ST) with a weight value of 0.26, which uses the power possessed by the agency to overcome threats, the ST strategy uses internal forces of the agency to avoid or reduce the impact of external threats. Third is the weakness-opportunity strategy (WO) with a weight value of 0.17, which utilizes the existing opportunities by minimizing existing weaknesses, the WO strategy aims to improve internal weaknesses by utilizing external opportunities. The fourth is the weakness-threat strategy (WT) with a weight value of 0.08, namely activities that are defensive and try to minimize weaknesses and avoid threats, the WT strategy aims to reduce internal weaknesses by avoiding external threats.