bluuebunny/crossref_metadata_2025 huggingface dataset:
Pressure control strategy for high-pressure tubing
Authors: Lin Guanwei , Wang Linhan , Chen Kangrui
Published: September 2020

The entry and ejection of fuel into and out of high-pressure oil tube are the basis of many fuel engines. However, the intermittent working process of fuel entering and exiting will be leading to pressure changes in high-pressure oil tube. Furthermore, it will affect the efficiency of an engine. Therefore, it can be seen important to control high-pressure oil tube effectively. Also, it will be increasing the efficiency of an engine, while having a greatly impact on the development of engine manufacturing and energy industry. This paper is to focus on solving pressure control under high-pressure oil tube. The problems are stable pressure at the inlet of the high-pressure tubing and high-pressure oil tube with no pressure reducing valve and only one nozzle. Regarding the first one, we used the least square method to fit an elastic modulus and pressure data. Then, a differential equation model of pressure and time were set inside high-pressure oil tube. Meanwhile, we also worked on a delayed injection strategy and traversal search algorithm to have results. So, the optimal delayed injection time is 0.23 ms while the one-way valve opening time is 3.06 ms . The maximum offset pressure is about0.3 MPa. The second case which is based on the first case. In order to achieve pressure control, linking the pressure at the inlet of high-pressure oil tube to a cam and using the principle of mass conservation. So, it is stated that the pressure can be stabilized as much as possible when the angular velocity is 0.0275 rad/ms. Finally, we verified the feasibility of the model through simulation analysis.
Optimal allocation in regression models with cost consideration
Authors: Du Yujing
Published: September 2020

In this paper, we discuss the optimal allocation problem in a multi-level experiment when the cost of running the experiment at each level is taken into consideration. An objective function with cost consideration is proposed and the properties of the objective function are discussed. The procedure to the algorithm to obtain the optimal allocation is presented. Numerical examples are used to illustrate the methodology developed here.
Multiple resource allocation for precision marketing
Authors: Zhang Siyu , Liao Peng , Ye Heng-Qing , Zhou Zhili
Published: September 2020

In the precision marketing of a new product, it is a challenge to allocate limited resources to the target customer groups with different characteristics. We presented a framework using distance-based algorithm, K-Nearest-Neighbour, and support vector machine to capture customers’ preference towards promotion channel. Additionally, on-line learning programming was combined with machine learning strategies to fit a dynamic environment, evaluating its performance through a parsimonious model of minimum regret. A resource optimization model was proposed using classification results as input. In particular, we collected data from a loan agency that offers loans to small business merchants. Our sample contained 525,919 customers who will be introduced to a new financial product. By simulating different scenarios between resources and demand, we showed an up to 22.42% increase in the number of expected merchants when K-NN was performed with optimal resource allocation strategy. Our results also show that K-NN is the most stable method to perform classification, and that distance-based algorithm has the most efficient adoption with on-line learning.
Drug trading analysis model based on weight graph, correlation analysis and Leontief function
Authors: Ye Jianmin , Zhang Hui
Published: September 2020

Our paper mainly studies the integrated application of weight graph, correlation coefficient and Leontief function to regional drug trading. To be better understood, we establish our model on the analysis of drug transaction among 5 states in America, including Ohio, Kentucky, West Virginia, Virginia and Pennsylvania. First, we build the weight graph with 5 states as vertexes to calculate the transaction strength of each state with others to predict the drug diffusion trend. And based on equilibrium analysis, we find that only the drug market in Ohio hasn’t reached balanced state, which means the drug sale will increases. Second, we select 13 socio-economic indicators, aiming to use correlation analysis to reflect their influence on drug diffusion. We find that more incomplete households, more population with bad marital status and with low educational attainment probably ascend the drug cases. Third, we apply Leontief function to analysing how the drug production change when the quantity of material, transportation, fixed capital, workforce and demand, 5 main parts in the complete industrial chain are changing. Therefore, it may help to come up with some practical ways of controlling the illegal drug transaction.
Estimation for nearly unit root processes with ARFIMA-GARCH errors
Authors: Chen Lingju , Xie Bihua
Published: September 2020

In this paper, we introduce a nearly unit root processes with ARFIMA(p; d; q)-GARCH(l;m) errors, and establish an asymptotic theorem for the autoregressive coefficient estimation of the proposed model under very mild conditions. It’s shown that the DF-type tests are functionals of the Ornstein-Uhlenbeck process rather than those of standard Brownian motions in the unit root case.
Research on the application of enterprise credit supervision risk evaluation index based on fuzzy matter-element of comprehensive evaluation
Authors: Zhou Li , Yuan Xingyu , Zhao Yan , Jiang Zhou
Published: September 2020

Credit supervision is not only an important institutional arrangement for the construction of social credit system, but also one of the main ways to give full play to the value and role of credit. The risk evaluation of enterprise credit supervision can provide important reference for classified supervision. The research on the risk evaluation model and indicators of enterprise credit supervision is of great significance to improve the scientificity and accuracy of enterprise credit supervision risk evaluation. Through the research and analysis of enterprise credit supervision risk evaluation model and evaluation index, the fuzzy matter-element evaluation model is constructed, and the comprehensive weight of enterprise credit supervision risk evaluation index is calculated by subjective and objective weighting methods respectively, and the main factors affecting the level of enterprise credit supervision risk are analyzed, so as to provide suggestions for enterprises to carry out credit supervision risk evaluation and strengthen credit supervision risk management It provides a scientific reference.
Analysis of the factors affecting the study of college students and the countermeasures taken during the outbreak of COVID-19
Authors: Zhang Yingying
Published: September 2020

This study was focused on understanding the learning effect and influencing factors affecting students at home during the epidemic, better help the college students in improving their learning efficiency, and achieving the state of “no suspension of classes”. At first, we considered the students of science and engineering of Shandong University of management as an example to collect the relevant data through the questionnaire; secondly, with the help of SPSS 23.0 software, factor analysis method is used to obtain three public factors affecting the learning outcomes of students: external interference factor, curriculum factor, and emotional factor. At last, the actual situation of students and the results of the questionnaire have been combined in this paper, which puts forward practical improvement measures from the viewpoint of teachers and students.
Blow-up criterion for the chemotaxis-fluid equations in a 3D unbounded domain with mixed boundary conditions
Authors: Peng Yingping
Published: September 2020

In this paper, we consider a coupled chemotaxis-fluid system in a 3D unbounded domain with mixed boundary conditions. A blow-up criterion for such a system is established by using the proper elliptic estimates and Stokes estimates under some assumptions on the chemotactic sensitivity function.
Pointwise multipliers on the weighted BMOA space
Authors: Ye Shanli
Published: September 2020

Let

D

= {z : |z| < 1} be the unit disk in the complex plane C, Φ :

D

→ C is a analytic map. We study the multiplication operator M

Φ
on the logarithmic weighted BMOA space

B
M
O

A

log

=

{
g
∈
H
(
D
)
:

sup
⁡

a
∈
D

(
log
⁡

2

1
−

|

a

|

2

)

2

∫

D

|

g

′

(
z
)
|

2

(
1
−

|

φ

a

(
z
)
|

2

)

d
m
(
z
)
<
∞
}

. We obtain that a sufficient condition for the operator M

Φ
to be a bounded operator on BMOA
log. We also get that another necessary condition for the operator M

Φ
to be bounded on BMOA
log.
A new method for personnel protection failure evaluation in metro fire with multiscenario coupled three dimensional model
Authors: Wang Chen-Yang , Li Tie , Liu Jian , Zhang Hui
Published: September 2020

With a closed environment and dense population, urban metros are difficult to evacuate quickly in the case of fire, which often leads to serious consequences such as stampedes. To deal with metro fires effectively, this paper presents a three-dimensional model for assessing the failure probability of personnel protection. First, scenario elements of metro fire evolution were selected based on typical cases and traditional performance-based evaluation methods, and a scenario element database was constructed. Second, based on this approach, a three-dimensional evolution model of the metro fire scenario was established to visually express the interaction relationship of each scenario element in plane dimensions. Finally, an evaluation model of the personnel protection failure risk index was constructed by coupling the metro fire, emergency management and trapped personnel, and the failure probability of personnel protection was calculated. This model can evaluate the real-time risk of death in the process of metro fire accidents and provide an important reference for emergency decisions and plan deployment.
The value distributions and uniqueness of q-shift difference polynomials of entire functions
Authors: Luo Libao , Xu Junfeng
Published: September 2020

We first consider the zeros of a big class generalized q-difference polynomials in entire function which come from the Hayman problem. Second, we research about uniqueness result of the class q-difference polynomials in entire function which share a value. Our results improved or generalize the previous known results.
Study on regional characteristics of soybean production in China from a temporal and spatial perspective
Authors: Wang Yu , Xu Shiwei , Zhang Yongen , Yu Wen , Li Jianzheng , Zhou Han
Published: September 2020

Being the country of origin of soybean, China was once the biggest producer of the world, and has become the largest importer by now. Various regions of China are seeing profound changes of soybean production. By analyzing the changes of soybean producing areas in China from 1978 to 2017, this article revealed the characteristics of soybean’s spatial variation in terms of the planting area and yield per unit area in the four decades in China and comprehensively explained the present situation and future potential growth of soybean production in China based on soybean growth characteristics and the resources in various regions. The results show that: (1) Since the Reform and Opening Up, the traditional main producing areas still maintain their principal part but show certain changes of geographical distribution; (2) The regional distribution of soybean production shows an overall trend of “concentrated over vast areas and dispersed in small areas”; (3) The planting areas of soybean are increasing steadily in Heilongjiang, Inner Mongolia, Jilin, He’nan and Anhui, while those are decreasing rapidly in Huang-Huai-Hai area and the southern area.
Study of external electron beam injection into proton driven plasma wakefields for AWAKE Run2
Authors: Verra L. , Gschwendtner E. , Muggli P.
Published: September 2020

We describe an external electron injection scheme for the AWAKE experiment. We use scattering in two foils, that are necessary as vacuum window and laser beam dump, to decrease the betatron function of the incoming electron beam for injection and matching into plasma wakefields driven by a self-modulated proton bunch. We show that, for a total aluminum foil thickness of ~ 280 μm, multiple Coulomb scattering increases the beam emittance by a factor of ~ 10 and decreases the betatron function by a factor of ~ 3. The plasma in the accelerator is created by a ionizing laser pulse, counter-propagating with respect to the electron beam. This allows for the electron bunch to enter the plasma through an “infinitely” sharp vapor-plasma boundary, away from the foils.
Summary of WG2: Ion beams from plasmas
Authors: Lancia L. , Margarone D.
Published: September 2020

Working Group 2 was dedicated to presentations on ion acceleration by laser-plasma interaction. This summary reports some highlights on different topics, grouping the presentations in four different areas of interest for the community: (i) ion acceleration facilities, (ii) target engineering and manipulation, (iii) laser-plasma interaction and diagnostics, and (iv) ion acceleration mechanisms.
First dielectric wakefield experiments at Daresbury Laboratory
Authors: Saveliev Y M , Pacey T H , Jones J K , Xia G
Published: September 2020

The first dielectric wakefield acceleration (DWA) experiments have been conducted at the CLARA/VELA test facility at Daresbury Laboratory, UK. The DWA structures were of planar geometry with variable gap and dielectric thicknesses ranging from 0.025 to 0.2 mm. The facility, in its current state, provided electron bunches with up to 100 pC bunch charge, and variable 0.2-2.0 ps bunch lengths at the beam energy of 35 MeV. All major wakefield effects have been observed including energy modulation in longer bunches, energy dechirping, and transverse streaking and focussing. With a modest bunch charge of ∼ 50 pC, a decelerating field of ~ 8 MV/m was measured. Using this variable gap planar structure, we have also demonstrated generation of continuously tunable narrowband THz. A summary of experimental results and near future developments are presented.
Proposal of a Compact High-Gradient Ka-Band Accelerating Structure for Medical and Industrial Applications
Authors: Faillace L. , Behtouei M. , Dolgashev V.A. , Spataro B. , Torrisi G. , Variola A.
Published: September 2020

Technological advancements are strongly required to fulfil demands for new accelerators devices from the compact or portable devices for radiotherapy to mobile cargo inspections and security, biology, energy and environmental applications, and ultimately for the next generation of colliders. New manufacturing techniques for hard-copper structures are being investigated in order to determine the maximum sustainable gradients around 150 MV/m and extremely low probability of RF breakdown. In this paper, the initial studies on the RF and mechanical design for a compact Ka-Band accelerating structure are presented as well as preliminary beam dynamics estimations.
Dosimetry of laser-accelerated carbon ions for cell irradiation at ultra-high dose rate
Authors: Milluzzo G. , Ahmed H. , Romagnani L. , Doria D. , Chaudhary P. , Maiorino C. , McIlvenny A. , McMurray A. , Polin K. , Katzir Y. , Pattathil R. , McKenna P. , Prise K. , Borghesi M.
Published: September 2020

Charged particle radiotherapy is currently used in an increasing number of centres worldwide. While protons are the most widely used ion species, carbon ions have shown many advantages for the treatment of radioresistant tumours, thanks to their higher Linear Energy Transfer (LET) and Relative Biological Effectiveness (RBE). The complexity and the high cost of conventional carbon therapy facilities has stimulated the investigation of alternative acceleration approaches such as the processes based on high-power laser interaction with solid targets. Recent developments in ion acceleration have allowed to investigate for the first time the biological effects of carbon ions at ultra-high dose-rate (109-1010 Gy/s) using the GEMINI laser system at Rutherford Appleton Laboratory (RAL). Carbon ions were accelerated from ultrathin (10-20 nm) carbon foils and energy selected by a magnet allowing to irradiate the cells with an average carbon energy of 10 MeV/u ± 8%. A dosimetry approach specifically designed for these low-energy ions was employed, which was based on the use of unlaminated EBT3 Radiochromic films. The details of the dosimetry arrangement as well as the Geant4 simulation performed to predict the energy and the dose distribution at the cell plane will be reported.
Photon beam line of the water window FEL for the EuPRAXIA@SPARC_LAB project
Authors: Villa F , Balerna A , Chiadroni E , Cianchi A , Coreno M , Dabagov S A , Cicco Di , Gunnella R , Marcelli A , Masciovecchio C , Minicucci M , Morante S , Rezvani J , Scopigno T , Stellato F , Trapananti A
Published: September 2020

A proposal for building a new Free Electron Laser facility at the Laboratori Nazionali di Frascati, EuPRAXIA@SPARC_LAB, is at present under consideration. This FEL facility will exploit plasma acceleration to produce ultra-bright photon pulses with durations of few femtoseconds down to the wavelengths between 2 and 4 nm, in the so called “water window”. The main class of experiments to be performed will include coherent diffraction imaging, soft X-ray absorption spectroscopy, Raman and photofragmentation measurements. In this article we present the updates on the photon beamlines design for the facility.
Modeling of capillary discharge plasmas for wakefield acceleration and beam transport
Authors: Cook N M , Carlsson J , Moeller P , Nagler R , Tzeferacos P
Published: September 2020

Next generation accelerators demand sophisticated beam sources to produce ultra-low emittances with large gradients. The subsequent beamline optics are equally critical to transporting these beams between accelerating stages or to interaction points. Capillary discharge plasmas may address each of these challenges. Capillaries have been demonstrated as sources capable of increasing the peak energy and beam quality of laser wakefield accelerators, and as active plasma lenses featuring orders-of-magnitude increases in peak magnetic field. These systems are sensitive to energy deposition, heat transfer, ionization dynamics, and magnetic field penetration; therefore, improved modeling will enable advances in capillary design. We present simulations of capillary discharge waveguides and active plasma lenses in using FLASH, a publicly-available multi-physics code in development at the University of Chicago. We report on the implementation of a 2D, cylindrically symmetric capillary model for capturing plasma density and temperature evolution with realistic conductivities and magnetic fields. We then illustrate the use of laser energy deposition to model low density channel formation for the matching and guiding of intense laser pulses. Lastly, we discuss simulations of active capillary plasmas with different fill species, which show agreement with experimental observations of nonlinearities in the current density profile and magnetic field.
Summary of Working Group 8: Advanced and Novel Accelerators for High Energy Physics
Authors: Carlsten B E , Schulte D , Lu W
Published: September 2020

We summarize the conclusions from Working Group 8 of the European Advanced Accelerator Concepts workshop in 2019 (EAAC2019) on the suitability and prospects for using advanced and novel accelerator (ANA) technology for future high-energy physics (HEP) applications. We identify the key technology gaps remaining for the main ANA approaches for building future e+/e− linear colliders and estimate the time scales needed to close them. We also identify synergistic development paths that can be leveraged to achieve key technology demonstration steps through non-HEP applications and through non-lepton-collider HEP applications.
Preliminary Results of an Experiment to Determine the Thickness of Snow Cover Using Ground Penetrating Radar and a Laser Rangefinder
Authors: Marchuk V N , Grigoryevsky V I , Byshevskii-Konopko O A
Published: September 2020

The article discusses the combination of a ground penetrating radar (GPR) with a laser rangefinder to determine the snow cover thickness, an experiment is described in accordance with the proposed methodology and a comparative analysis of the data obtained is carried out. The purpose of the proposed development of the combined method is to improve the accuracy of snow cover depth determination. Many tasks require high spatial resolution both in the horizontal coordinate and in the depth of the snow cover, since local excess of its critical level can lead to irreversible consequences. Such a situation can arise, for example, when avalanches come down in mountainous areas or when roofs of a large area collapse when snow accumulates on them. The accuracy of the snow depth determination obtained in the experiment is ∼ 10 cm and the resolution along the horizontal coordinate is ∼ 5 cm. The predicted distance based on the equipment used is about 500 meters. The proposed method can be used for determining the amount of snow on roofs of buildings and structures, as well as in predicting the descent of avalanches, and in search for hidden objects under the snow in emergency situations.
Over-the-horizon detection radar ionosphere support system
Authors: Litvinov S
Published: September 2020

The article raises the problem of fine tuning over-the-horizon radars with relevant information about the parameters of the ionosphere. To improve the accuracy of the radar, it is proposed to create a system of remote positions, which are ionosondes of vertical and inclined sensing. The results of the operation of such ionosondes serve to adjust the global model of the ionosphere. Thus, the quality of the radar is significantly improved, allowing more accurately determine the coordinates of air targets..
Two-channel acoustic noise control system
Authors: Bulkib V V , Tersin V V
Published: September 2020

The results of the development and experimental verification of a two-channel acoustic noise control data processing system that provides real-time control of non-deterministic broadband acoustic noise are presented. The system is implemented using the LabView graphical programming language G. The length of the measured realization is determined by the sample size ratio to the sampling frequency, and the number of measurements of each sound signal is determined by the ratio of the analysis time to the length of the measured realization. The measured realization of the audio signal in the form of 40,000 16-bit binary numbers is processed using the fast Fourier transform. As a result of processing, a discrete audio signal spectrum is obtained in the range from 0 to 20 KHz in steps of 1 Hz. To check the quality of the system’s functioning, a pair of microphone capsules of the MDN-318, wm61, etc. types, widely used in computer audio equipment, preliminarily selected according to the amplitude-frequency characteristics. The results of system verification using a laboratory acoustic chamber are presented. The advantage of the system is the receipt of a difference spectrum of controlled signals. The conclusion is drawn about the possibility of using this system for a qualitative assessment of changes in the noise level along the propagation path, as well as additions to the results of measurements performed by standard methods.
Analysis of seismic bidirectionality on response of reinforced concrete structures with irregularities of l-shaped plan and soft story
Authors: Sobrado V H , Yaranga R , Orihuela J D
Published: September 2020

The seismic design of buildings is usually performed using one-way analysis for each of main axes independently. However, seismic events have fairly random behaviour and impose bidirectional solicitations on structures. In this work, the study of the response in structures subjects to earthquake loads with irregularity of l-shaped plan and soft story is carried out. For this, the linear time-story analysis (LTHA) of these has been carried out imposing seismic solicitations in two orthogonal directions. Thus, the structural response with incidence angle variations of 10° is obtained and compared with the response derived from the unidirectional analysis. Variations of up to 50% and 72% are obtained for model structures with l-shaped plan and soft story respectively.
Experimental investigation into the failure process of exterior beam-column joints with high-strength reinforcements
Authors: Arshadi H , Kheyroddin A , Naderpour H , Kioumarsi M
Published: September 2020

Although using high-strength reinforcements (HSRs) have economical and execution benefits, their possible negative effects on the performance of structures such as ductility, energy dissipation, and damage process caused them to be restricted by building codes in seismic areas. In this research, the HSR effects on the cyclic behavior, cracking process, and damage indices of exterior beam-column joints were experimentally investigated under cyclic loading. Three exterior beam-column joints with HSRs (with the yield strengths of 500 and 580 MPa) were designed based on the special seismic provisions of ACI 318-19. These specimens were subjected to cyclic loading and their responses were obtained. The results showed that using HSRs led to increasing the width and depth of the cracks. Then, two methods of calculating damage indices (introduced by Promis et al., 2009) were applied based on the experimental results. Considering the damage indices, it was observed that using HSRs increased the damage indices of the specimens and the damage distribution in them.
Comparative analysis of the seismic response of an essential and a common building using site spectra and dynamic modal spectral analysis according to South American standards
Authors: Huaripata F , Torres J F , Orihuela J
Published: September 2020

The buildings built on coastal soil, located on the fire belt present a high seismic risk, since there are unfavorable soil conditions and in other cases plate subduction. This has led to countries located in these areas developing seismic regulations that allow the proper design of engineering works; however, various regulations present different considerations for the design, such as the use of parameters that allow standardizing the design that often does not present the same seismic responses of the real dynamic behavior of the soil. Therefore, the present research proposes to evaluate the seismic response of two buildings, one essential and the other common, with an analysis using site spectra, a dynamic spectral modal analysis and additionally a time-history analysis taking into account soil types and use of different seismic parameters of South American standards. The main result is that the seismic response by analysis with site spectra (ES) is greater compared to the dynamic spectral modal analysis according to the magnitude of the earthquakes and the type of soil.
Digital photogrammetric survey from aerial images for architectural documentation in sites and monuments: a case study of Wat Mahathat Lop Bury, Thailand
Authors: Varodom Suksawasdi M. L.
Published: September 2020

This study is a part of research to describe a way to obtain various photogrammetric products from aerial photograph using a drone. The aim of the project was to develop a methodology to obtain information for a case study of the architecture documentation in Wat Mahathat Lop Bury, Lop Bury Province, Thailand which a combining the manoeuvrability and low cost of a drone with the accuracy of the results of the Agisoft PhotoScan software. These will be improvements for architecture documentation working with limited budgets or with limited access to sites.
Sensitivity Analysis of Designs of Row House Planning Influencing on Local Microclimate and Building’s Cooling Energy Consumption in A Tropical City
Authors: Jareemit D , Srivanit M
Published: September 2020

This study aims to investigate the impact of design characteristics of row house projects on outdoor thermal conditions and the building’s cooling energy consumption. The studied parameters comprise the design combinations of four street canyon orientations, building-two block shapes, four street canyon’s aspect ratios (H/W), and two window to wall ratios (WWR). The study firstly performs the simulations of air temperature and mean radiant temperature across the street canyons via using ENVI-met modeling. The simulated air temperature is used as input in energy modeling to calculate cooling energy consumption in a residential unit. The Standardized Regression Coefficient (SRC) obtained from the multiple regression analysis is used to determine the significant design parameters influencing on outdoor air temperature, mean radiant temperatures, and building’s cooling energy consumption. It is found that the increase of H/W has a positive effect on both outdoor conditions and building energy consumption. At the same time, the impact of street canyon’s orientation and building-block shape on those issues shows an invert direction. Future studies should investigate how to optimize the design for achieving better outdoor thermal conditions and building energy efficiency.
Study on Making Formulation of Jujube Dietary Fiber Tableware
Authors: Wang Shaocheng , Liu Shijun , Sun Huanhuan , Lv Yanping
Published: September 2020

Objective: To develop jujube dietary fiber tableware and optimize the best formula for jujube dietary fiber tableware. Methods: The tableware samples were made from the raw materials of jujube dietary fiber tableware according to different formulations, and the properties of anti-impact, leakage time, falling resistance, color and smell were evaluated, and the response surface method was used to establish a model for analysis and optimization, and the best formula was finally determined. Results: The results showed that the best formula of jujube dietary fiber tableware was jujube dietary fiber 4.1g, starch 5.0g, white granulated sugar 5.0g, gelatin 0.1g, carrageenan 0.1g, glycerol 1.0mL, water 12.0mL, fermentation time 23.0min. Conclusion: Through the best formula, the color and hardness of jujube dietary fiber tableware are similar to those of normal wooden tableware, and the jujube dietary fiber tableware is beautiful and practical.
Study on the mechanism of anti-cancer action of rosa roxbughii tratt based on network pharmacology
Authors: Mei Ying , Pu Xiang , Qu Xiangling
Published: September 2020

The active chemical components and targets of rosa roxbughii tratt were screened by the method of network pharmacology, and the molecular mechanism of its action was discussed. By consulting relevant literature reports, we established drug-disease targets by using databases such as TCMSP, TCMIP, Genecards and OMIM. Using STRING database to construct the protein interaction network between rosa roxbughii tratt and cancer target; and Cytoscape software was used to construct the interactive network diagram of “active ingredient-target-disease”. The function enrichment analysis of Gene Ontology (GO) and pathway enrichment analysis based on Kyoto Encyclopedia of genes and genomes (KEGG) were carried out by using biological information annotation database (David). We obtained 11 active components and 80 drug-disease targets were obtained, DAVID database was used to carry out GO function enrichment analysis and KEGG pathway enrichment analysis on 80 potential targets, and 303 biological processes and 114 signaling pathways were screened out to participate in the anti-cancer effect of rosa roxbughii tratt. The Pathway in cancer has the strongest correlation with cancer, which is related to the regulation of IL6, AR, CASP3 and other key genes. These key genes are related to myricetin, quercetin, kaempferol and other compounds in rosa roxbughii tratt. The anti-cancer compounds of rosa roxbughii tratt might were myricetin, quercetin, kaempferol and other compounds. The anti-cancer effect of rosa roxbughii tratt may regulation of key genes, indirectly affecting the sustained angiogenesis, developing apoptosis and promotion, so as to promote or inhibit the production of cancer.
Influence research of weak layer on slope sliding mode and stability
Authors: Li Ang , Li Wenli
Published: September 2020

Weak layer is an important factor leading to slope instability, which cannot be ignored in slope stability analysis. In order to explore the influence of weak layers on the slope slip mode and stability of the slope, this paper selects typical open-pit mine slopes containing weak layers as the engineering background, and comprehensively uses geological survey, laboratory tests, theoretical analysis and other methods to verify the characteristics of slope geological structure and physical mechanical properties of soil, at the same time, uses simplified Bishop method to analyze the change law of slope stability under the change of weak layer dip angle, and finally clarifies the influence of weak layer on slope slip mode and stability. The results show that: the initial dip angle of the weak layer is 6°, the corresponding stability factor is 1.553 and the initial landslide mode is the combined failure of shear arc and weak layer. As the dip angle of the weak layer increases, the slope stability coefficient decreases. When the dip angle of the weak layer increases to 56°, the slope slip mode is transformed into the translational failure formed by the weak layer, and the stability factor is reduced to 1.055 at this time.
Design and Development of a Service Robot for Wi-Fi RSSI Fingerprint Data Collection
Authors: Bakri M. Q. , Ismail A. H. , Hashim M. S. M. , Muhamad Azmi M. S. , Safar M. J. A. , Marhaban M. H.
Published: September 2020

We have designed a service robot that can be used for Wi-Fi RSSI Fingerprint database construction for indoor positioning system. This work aims to aid and ease the signal fingerprint database construction process which currently conducted manually by carrying the data acquisition tools around the experimental field. The robot architecture design considered the values and constraint in performance, aesthetic, cost, and expandability. Analysis of the robot’s mobile specification was made in order to choose the optimum hardware components. The robot has three main sections which are mobile platform, storage compartment, and user interactive screen that is capable to display facial expression and other useful information.
State-of-the-art for Magnetorheological Elastomers Fabrication and Hydro-tribological Characterisation
Authors: Nasir R MD , Ru C F , Shuib R K
Published: September 2020

Magnetorheological effect on mechanical properties of its specific applications has been studied. Mechanical properties such as hardness, tribology characteristic and salt water and water absorption with hygrothermal effect will be further studied on wear performance of MRE on marine equipment applications. Isotropic, anisotropic and anisotropic with added N330 carbon black filler of Ni Zn Ferrite Magnetorheological Elastomers (MREs) were prepared with Ni Zn Ferrite filler, Ni1 - xZnxFe2O4 particles weight fraction of 70%. Images of Scanning Microscopy Electron (SEM) and Energy Dispersive X-Ray Analysis (EDX) are identified with the presence of the structure of Ni Zn Ferrite in the natural rubber matrix. Anisotropic Ni Zn Ferrite MREs with added carbon black filler given highest hardness value of 90.78; least effected on salt water and water absorption and hygrothermal effect; better wear performance with a low average specific coefficient of friction(COF), specific wear rate and least loss of wear volume. Therefore, it is most suitable use for future application in a wet environment for a long period.
Simulation on Water Behavior in a Retention Pond at UNITEN
Authors: Zahari N. M. , Amieroul Mirza Mohamad M. , Zawawi M. H. , Abas Aizat , Aziz Nurhanani A. , Nurhikmah F.
Published: September 2020

Retention pond have been used widely to manage stormwater runoff to avoid flooding and downstream erosion and even improve water quality. It is an artificial pond that have vegetation around the perimeter and a permanent pool of water. This paper presents the study on water flow behaviours in UNITEN’s retention pond by using ANSYS Fluent. Findings shows that the velocity of water in wet condition is higher than the dry condition because of an additional inlet in wet condition to imitate the heavy rainfall phenomenon. It is also found that the water pressure in wet condition is higher compare to dry condition. Therefore, the conditions that have a higher movement of water can be determined through this simulation. Based on the findings, it can be concluded that the wet condition have a high movement of water behaviour compare to dry condition.
The Impact of Vortex Formation Due to The Operational Dam Condition: A Review
Authors: Azman Aqil , Zahari N.M. , Zawawi M.H. , Mansor M.H. , Ng F.C. , Abas Aizat , Nurhikmah F. , Aziz Nurhanani A.
Published: September 2020

There are various sources of energy throughout the world, renewable as well as non-renewable through which renewable energy sources are considered more environmentally friendly. Encompassed by all the sources of renewable energy, hydropower is considered the most beneficial source of energy. Proper operation of hydropower plant is very important for generating maximum energy by utilizing the available. However, formation of vortices at power intake can cause number of problems. The stronger vortices have more negative effects on the performance of hydropower plant which can also, draw debris and air into an intake causing vibration and damage to turbines. The present study addresses the vortices formation at the intake dam, several types of vortices and anti-vortex applications in order to overcome the vortex formations.
Works experience of chainsaw operators in peat swamp forest plantation in increasing timber productivity and efficiency
Authors: Suhartana S , Yuniawati
Published: September 2020

Felling is one of the logging activities that determines wood production. The appropriate and correct felling technique in plantation forests can increase the Efficiency of Timber Utilization (ETU). This research was conducted in one of the peat swamp forest plantation in Riau. The research objective is to determine the effect of work experience on the productivity and ETU in peat swamp forest plantations. The research method is by measuring the volume of wood harvested through local felling technique carried out by two chainsaw operators with different work experience. The results showed that: 1) The work experience of the chainsaw operator can effect felling productivity, production cost and ETU; 2) The average felling productivity produced by operator B is 10.151 m3/hour higher than operator A which is 8.888 m3/hour; 3) The average felling production cost for operator B is IDR 9,319.83/m3 lower than operator A which is IDR 10,812.79/m3; and 4) The lowest possible felling technique can increase ETU by 5% which is equivalent to an additional profit for the company of IDR 3,769,075,000/year.
A simple reducing water content technique for stingless bee honey (Heterotrigona itama) in South Kalimantan
Authors: Halwany W , Hakim S S , Rahmanto B , Wahyuningtyas R S , Siswadi  , Andriani S , Lestari F
Published: September 2020

Water content is one of the parameters of the honey product quality. Unlike Apis honey product, honey from stingless bee (Heterotrigona itama) have higher water content. To meet the required standard, reducing water content of stingless bee honey need to be done. Therefore, in this study we aim to find out the effect of using honey water content reducer device to water content and quality of stingless bee honey. We modified simple drying cupboard with heat pad to reduce honey water content. Moreover, nutrient analysis was carried out to know whether the drying process affect its nutrient quality. Six sample of stingless bee honey which was placed in a container (thickness=0.5 cm) and the temperature was set at 40°C. According to the study, to reach the recommended honey water content (21-22%) it takes approximately 3 hours with a value of R=0.848 in addition, drying treatment (40°C) did not affect the nutritional quality of stingless bee honey.
Color and dimensional stability of fast growing teakwood by mild pyrolysis and combination process
Authors: Kartikawati A , Wahyudi I , Pari G , Karlinasari L
Published: September 2020

Fast-growing teakwood had been subjected to Mild Pyrolysis (MP) and combination (MP + steam) processes. Performa of treated wood was evaluated by surface color change, mass loss, and dimensional stability. The CIELab. system was used to evaluate the color change, while anti-swelling efficiency was used to determine dimensional stability. The two processes were conducted within pyrolysis reactor under atmospheric pressure in the presence of limited oxygen. MP process was applied by heating the wood for 2 hours at 170 and 190°C without steam, while combination process was employed by flowing steam for 0.5 and 1 hour during the 2 hours heating period. The result showed total color change and dimensional stability increased along with the increase in temperature. Even though MP process could reduced water absorption and swelling, but combination process permits a better results. Treated wood by MP and steam has lower total color change and mass loss, but greater dimensional stability.
Potential uses of teak leaf litter for liquid smoke and of other utilizations: A review
Authors: Gusmailina  , Komarayati S , Wibisono H S
Published: September 2020

Teak (Tectona grandis) is one of the high-quality wood-producing trees. Large trees, straight trunk, large leafy, with the height reach 30-40 m. The nature and characteristics of teak trees usually drop their leaves every dry season, and this will cause problems for the surrounding community because the dry leaves fall into waste and have not been utilized properly. Waste of dried teak leaves will accumulate under the stands of teak trees, and in the dry season can be a trigger for forest fires. the teak leaves contain 48.51% bounded carbon, 6.61% moisture content, 31.72% ash content, 13.17% volatile content, and density 0.65 g/cm. In addition, teak leaves also contain flavonoid compounds, protein, nine phenolic acid or tannin compounds as well as crude fiber content covered in lignin of 22.9. Based on the content in the dry teak leaf litter waste, this paper presents an effort to use it into a number of useful products, one of which is the utilization of dry teak leaf litter waste for liquid smoke, and several other uses carried out by communities around the teak forest such as for charcoal briquettes, compost, medicine, and animal feed. Analysis of liquid smoke was carried out at the Integrated Laboratory of the Forest Products Research and Development Center using the Pyrolysis GCMS method. Meanwhile, other results are a review of several studies conducted by the community.
The consumer preferences for new styrax based perfume products using a conjoint analysis approach
Authors: Kholibrina C R , Aswandi A
Published: September 2020

Thousands of tons of raw styrax resin are exported, while various derivative products with millions of dollars in value are imported for centuries. Tobarium Styrax Perfume is the first domestic product that explores the styrax essential oil formula for signature perfumes. The objective of study is to determine consumer preferences for a new styrax based perfume product. A conjoint analysis approach was utilized to determine consumer preferences for these innovation products. Fifty consumers were asked to provide an assessment of the combination of perfume products. Data processing was assisted by computer with SPSS 14.0 program. The influence of five product profiles on consumer preference including scent variant, package, volume, grade of essential oil, and prices were examined. The results show that higher utility values indicate greater preference. The highest utility value is indicated by factor grade (essential oil concentration), this illustrates the respondents’ greatest preference for the quality of signature perfume. The scent variant (importance value 53.958) has the most influence on overall preference. This means that there is a large difference in preference between product profiles containing the most and the least desired scents. This is because the preference for a particular scent is personal and unique which might have affected the perception of respondents. The highest consumer’s preference is a perfume with scent Rizla, package spray, volume 25 mL, grade signature perfume and price IDR 120,000. The grade and price play a significant role but not as significant as scent variant. Two statistics, Pearson’s R and Kendall’s tau, provides high correlation between the observed and estimated preferences. This information is expected to encourage this domestic innovation product development.
Consumer acceptance on product diversification of Bengkirai (Shorea laevis): Attitudes, expectations and perception
Authors: Maharani R , Fernandes A
Published: September 2020

Bengkirai/Irai (Shorea laevis) is one of the potential species of Dipterocarps that is widely known as an antioxidant source that it can be utilized as a traditional herbal medicine for forest communities in East Kalimantan. However, no product diversification of Irai was introduced in the industrial scale yet. This study is therefore intended to introduced some products diversification of Irai as featured NTFPs products to give better understanding that herbal medicine is not a herbal product that it has been bitter tastes or old-fashioned. Besides, this study is also aimed to compare the difference in consumers’ attitudes, expectations, and perceptions towards product diversification of Irai if they have or do not have experience with those products. In this study, some products diversification of Irai were introduced, and divide into beverages (Irai tea and Irai beer) and desserts (Irai Plain Pudding and Irai silky Pudding). Organoleptic or consumer sensory analysis of these products was tested on 50 adult panelists by using a Hedonic scale with 5 classifications (very dislike, dislike, neutral, like, and very like). Data analysis was performed descriptively by using Excel and presented in the graphic. If organoleptic assessment that significantly affected observational variables, then advanced test (T-test) followed by using SPSS 16. Sensory analysis for dessert products showed there was a statistically significant difference in taste (T-test = 0.005) and flavor (T-test = 0.01). While there was no significant difference in all sensory parameters in beverage products. A recent study was also indicated that these products provided 2-3 times the economic benefit. It means these products need to be developed into a new business by developing an entrepreneurial spirit for improved a local community’s income.
The activated carbon produced from mayan bamboo (Gigantochloa robusta Kurz) and its application as dye removal
Authors: Efiyanti L , Indrawan D A , Hastuti N , Darmawan S
Published: September 2020

Bamboo pyrolysis was carried out at a temperature of 400°C for 4 hours to obtain a carbon as a pyrolysis product. The carbon soaked using potassium hydroxide (KOH) 5.35 M for 24 hours. The carbon obtained heated in a reactor at a temperature of 800°C for 5 hours then washed and neutralized until activated carbon obtained. The characterization of activated carbon conducted based on the Indonesian National Standard (SNI 06-3730-1995). The methylene blue adsorption process using a concentration of 50, 100, 150, and 200 ppm for 120 minutes reaction with the contact time variation are 30, 60, 90, 120,150, and 180 minutes in optimum concentration. The result shows that activated carbon has good quality based on SNI 06-3730-1995. The optimum methylene blue removal by bamboo activated carbon reached 99.77% in 120 minutes reaction and the adsorption type follows Langmuir isotherm.