bluuebunny/crossref_metadata_2025_split huggingface dataset:
Cultural macroevolution of musical instruments in South America
Authors: Aguirre-Fernández Gabriel , Barbieri Chiara , Graff Anna , Pérez de Arce José , Moreno Hyram , Sánchez-Villagra Marcelo R. 
Published: September 2021

AbstractMusical instruments provide material evidence to study the diversity and technical innovation of music in space and time. We employed a cultural evolutionary perspective to analyse organological data and their relation to language groups and population history in South America, a unique and complex geographic area for human evolution. The ethnological and archaeological native musical instrument record, documented in three newly assembled continental databases, reveals exceptionally high diversity of wind instruments. We explored similarities in the collection of instruments for each population, considering geographic patterns and focusing on groupings associated with language families. A network analysis of panpipe organological features illustrates four regional/cultural clusters: two in the Tropical Forest and two in the Andes. Twenty-five percent of the instruments in the standard organological classification are present in the archaeological, but not in the ethnographic record, suggesting extinction events. Most recent extinctions can be traced back to European contact, causing a reduction in indigenous cultural diversity.
Effects of ablative and non-ablative laser shock peening on AA7075-T651 corrosion and fatigue performance
Authors: Sanchez A. G. , Leering M. , Glaser D. , Furfari D. , Fitzpatrick M. E. , Wharton J. A. , Reed P. A. S. 
Published: September 2021

The fatigue performance from pre-corroded pits was studied in laser-shock-peened AA7075-T651 with and without a protective ablation-layer. Surface and microstructural characterisation showed laser-shock-peening generated residual stresses up to −400MPa, limited hardness and moderate surface roughness increase. The laser-shock-peened specimens were exposed to 3.5 wt-% sodium chloride solution for different levels of galvanostatic control. The compressive residual stresses did not significantly affect corrosion behaviour, or corrosion pit morphology. Laser-shock-peening-induced surface roughness had the most detrimental impact on corrosion performance. Fatigue testing of pre-corroded AA7075-T651 showed pits act as stress concentrations. Cracks initiated shortly after dynamic loading, reducing fatigue life by 50%. Laser-shock-peening increased fatigue life by 400% compared to corroded-untreated AA7075-T651, due to residual stresses effectively counteracting stress concentrations produced by pits. Highlights Pre-corroded laser-peened (LSP and LSPwC) AA7075-T651 fatigue performance is investigated. XRD and incremental hole drilling show deeper compressive residual stresses for LSPwC compared to LSP. Electrochemical tests show no significant changes in corrosion behaviour after laser peening. Fatigue testing and fractography show compressive residual stresses effectively counteract stress concentrations at pits.
An investigation of the magnetization of water and its influence on the solubility of Monoammonium Phosphate
Authors: Mghaiouini Redouane , Salah Mohammed , El Jouad Zouhair , Monkade Mohamed , EL Bouari Abdeslam 
Published: September 2021

Abstract
Fertilization is one of the essential techniques in agriculture. Monoammonium Phosphate (MAP) is the most widely used in the field of soil fertilization. The effectiveness of MAP in the field of fertigation, depends on its solubility in water. Three experimental factors such as MAP content, magnetization time, and water type were taken into account to optimize the experimental factors for a large value of Total Dissolved Solids (TDS). In our study, we chose the complete factorial model by the Minitab software, 9 experiments (3*3). The TDS is clearly influenced by the type of water, followed by magnetization time and finally the MAP content. The percentage contribution of water type, magnetization time (tm), and MAP content on the TDS was 68%, 17%, 4%, respectively. The optimal balance of factors for a value of TDS large was 16% MAP, 10 min water magnetization, and type of water (Tap water). The outcomes of this paper can encourage farmers to adopt more environmentally friendly farming practices in their management of fertigation.
Unpolarized proton DVCS at 10.6 GeV with CLAS12 at Jefferson Lab
Authors: Christiaens Guillaume 
Published: September 2021

Abstract
Data taking with the new CLAS12 spectrometer at Jefferson Laboratory started in 2018 with a longitudinally polarized electron beam at 10.6 GeV sent on an unpolarized liquid hydrogen target. In this paper, a first glance at beam-spin asymmetry of photon electroproduction ep → e’p′γ from the Spring 2018 data set is presented.
Characterization and Comparison of Wood charcoal from Traditional Charcoal Burning Using Different Processes
Authors: Laorach Lumpoon , Jutajan Watcharanon , Masakul Pristanuch 
Published: September 2021

Abstract
This research aimed to study the physical and chemical characteristics of wood charcoals burned using three traditional burning processes, i.e., burning by the clay kiln, the cement kiln and the high temperature kiln. The physical and chemical characteristics of the charcoal samples were studied as follows density, carbon content, application efficiency, general appearance, moisture content, heating value, fire flakes and smoke. Then, the tested results of charcoal samples were compared with the community standard for charcoal production, 658/2547. Moreover, the chemical compositions of samples were also investigated by Energy Dispersive X-ray spectroscopy (EDS). The studied results shown that the amount of compositions elements found in all three charcoal were composed of Carbon, Oxygen and Potassium as the main elements. It was found that the carbon content of charcoal sample burned by the high temperature kiln process was highest as compared to the charcoals obtained from two burning processes.
Effects of the ratio of Al/Ti target current on the chemical composition, structure, morphology, wettability and corrosion resistance of sputtered titanium aluminium films
Authors: Rattana T , Choeysuppaket A 
Published: September 2021

Abstract
Titanium aluminium (TiAl) alloy thin films were deposited on silicon wafer and stainless steel substrate by sputtering method. The effects of the Al/Ti target current ratio (R) on chemical composition, structure, surface morphology, wettability, and corrosion resistance of the deposited films were investigated using energy dispersive X-ray spectroscopy (EDX), X-ray diffraction (XRD), scanning electron microscopy (SEM), atomic force microscopy (AFM), contact angle measurement, and potentiostat, respectively. In the experiment, when the Al/Ti target current ratio increased from 0.375 to 1.5, the Al/Ti concentration ratio of the deposited films increased. When the Al/Ti target current ratios were 1.0 and 1.5, the deposited film structure exhibited γ-TiAl phase with tetragonal crystal structure. Moreover, the Al/Ti target current ratio of 1.5 provided the deposited film with the highest crystallinity, surface roughness, hydrophobicity, and corrosion resistance.
Study on Judd-Ofelt theory for Er3+ and Yb3+ doped tungsten gadolinium borate glasses for NIR lighting application
Authors: Jarucha N. , Wantana N. , Ruangtaweep Y. , Kaewkhao J. 
Published: September 2021

Abstract
The tungsten gadolinium borate glass doped with Er3+ and co-doped with Er3+/Yb3+ were prepared by melt quenching technique to study the absorption, Judd-Ofelt theory, and luminescence properties. The glass composition (30-x) B2O3 - 42.5 WO3 - 27.5 Gd2O3 - xEr2O3 (where x = 0.1 mol %) and (30-x-y) B2O3 - 42.5 WO3 - 27.5 Gd2O3 - xEr2O3 - yYb2O3 (where x = 0.1 mol % and y = 1.0 mol %). The absorption spectra display the absorption peaks of the samples correspond with Yb3+ and Er3+ in the glass network, and the spectral parameters of each absorption and emission peaks were calculated using the Judd-Ofelt theory. NIR photoluminescence under 978 nm excitation was measured of glass in the region 1400-1700 nm. NIR emission display a peak centered at 1543 nm. This research is available for tunable laser and conventional-length optical amplifier.
The Gamma Rays Shielding Properties of Barium Phosphate Glasses in Energy Range 1 keV to 108 keV
Authors: Jarupreedephad K. , Borisut P. , Chaiphaksa W. , Limkitjaroenporn P. , Kaewkhao J. 
Published: September 2021

Abstract
This research aimed theory of gamma ray shielding properties investigation of (100-x)P2O5:xBaO glass systems (where x = 5, 15, 25, 35, 45, 55, 65, 75 mol. %), were calculated by WinXcom program. The theoretical values of the mass attenuation coefficient, effective atomic number, and electron density were investigated in the energy range of 1 keV to 108 keV. The partial interactions (photoelectric, coherent scattering, incoherent scattering, and pair production) were studied in this work. The results show the higher gamma ray shielding properties at the higher concentration of barium oxide in the glass formula. Moreover, the half value layer results have been compared with some standard shielding materials at 662 keV for gamma ray.
Optical absorption and photoluminescence investigations Dy3+ doped oxyfluoride phosphate glass system for active laser medium and solid-state lighting materials
Authors: Sarumaha C. S. , Wantana N. , Rajagukguk J. , Kaewkhao J. 
Published: September 2021

Abstract
This article reports on the optical, photoluminescence, and radiative properties of Dy3+ doped oxyfluoride glass. The composition of glass is: 20Li2O–10AlF3–69P2O5–1Dy2O3 (LAPD). The glass has been prepared using the melt-quenching technique at 1100°C with a total mass of 15 grams in an alumina crucible. Judd–Ofelt analysis was used to determine the intensity parameters and radiative properties of Dy3+ ion in glass. The CIE 1931 chromaticity diagram coordinate is calculated to define the color coordinate of emission in a glass sample. Based on research, it is expected to produce glass material that is applied as an active laser medium and solid-state lighting materials.
Investigation of Parameters Affecting the Efficiency of Thermoelectric Refrigerator
Authors: Kaewsai Sakhunthip , Singsoog Kunchit , Seetawan Tosawat 
Published: September 2021

Abstract
The efficiency of thermoelectric refrigerator was investigated by two thermoelectric cooling (TEC 1-12709) at outside insulator box with cooling side at inside box and rejected heat at outside box by heat sink and fan. We applied electrical current 0.5 – 2 A for 15 minutes at room temperature and found that the inside thermoelectric refrigerator box showed a lowest temperature decreasing at center from 26.49 °C to 19.32 °C and at surface of TEC from 25.70 °C to 7.05 °C. The highest coefficient of performance (COP) is 0.10 by parallel connection.
Designing and Fabricating a Prototype of the Elastic Thermoelectric Generator
Authors: Manawong Piyada , Singsoog Kunchit , Seetawan Tosawat 
Published: September 2021

Abstract
The elastic thermoelectric generator (ETEG) was fabricated by using 27 couples of n-Bi2Te3 and p-Sb2Te3 bulk thermoelectric materials in size of 3 × 3 × 5 mm3 on silicone substrate and using copper plate for electrodes. It was found that the open circuit voltage shows maximum value of 46.74 mV at temperature difference 13.85 K. External load resistances were apply in the measurement and varies for obtaining the maximum output power. The matched load resistance is 0.22 Ω obtaining maximum power about 3.46 mW at temperature difference difference of 13.85 K. The output power, voltage and current were increased with temperature difference increasing and show maximum values about 35.19 mW, 27.82 mV and 126.36 mA at temperature difference 12.75 K.
Effect of Nd2O3 doping on spectroscopic characteristics of zinc barium boro-tellurite glass for laser medium application
Authors: Supanroth T. , Sa-ardsin W. , Yasaka P. , Boonin K. , Kaewkhao J. 
Published: September 2021

Abstract
The ZnO-BaO-B2O3-TeO2 (ZBBoT) glass samples were prepared, and their properties affected by varied concentrations of Nd2O3 doped in were investigated. The traditional melt quenching process was conducted to synthesize the samples which were explored to identify their density, molar volume, refractive index, absorption, photoluminescence (PL) and PL decay spectral profiles. The optical absorption has been used to derive the Judd-Ofelt (J-O) parameters (Ωλ, λ = 2, 4 and 6). The trend of J-O parameter is Ω2 > Ω6 > Ω4. Moreover, the J-O parameters are used to predict the radiative properties which are significant for the assessment of the suitability of a glass for laser emission. The emission of glasses exhibited 2 peaks at 1060, and 1345 nm. Based on research, it is expected to produce glass material that is applied as an active laser medium and solid-state lighting materials.
Double Moving Average Control Chart for Zero-Truncated Poisson Distribution
Authors: Areepong Y , Chananet C 
Published: September 2021

Abstract
The objective of this paper is to present an explicit formula for Double Moving Average (DMA) control charts when the observation follows a Zero-Truncated Poisson (ZTP) distribution. The popular characteristics of a control chart are Average Run Length (ARL0
) for in-control process and Average Run Length (ARL1
) for out-of-control process. Whereas ARL0
is the mean of observations taken before, a system gives an out-of-control signalled. For ARL1
is the expected number of observations taken from an out-of-control process until the control chart is shown the outof-control signal. The ARL results indicated that the DMA control chart for Zero-Truncated Poisson distribution (DMAZTP
) is superior to the MA control chart for Zero-Truncated Poisson distribution (MAZTP
) for detecting all magnitudes of shifts. This explicit formula is accurate, as well as easy to be implemented and used by practitioners
Computation of ARL on a CUSUM Control Chart for a Long-Memory Seasonal Autoregressive Fractionally Integrated Process with Exogenous Variables
Authors: Peerajit W 
Published: September 2021

Abstract
The aim of this study is to derive explicit formulas for the average run length (ARL) of a long-memory seasonal autoregressive fractionally integrated model with exogenous variables process on a cumulative sum (CUSUM) control chart with exponential white noise. The efficiency of the proposed explicit formulas was compared with a numerical integral equation (NIE) method via the relative percentage change to determine the accuracies of the ARL derivations. Although both methods were in good agreement, only 1 second of CPU time was required for the explicit formulas while 32-35 minutes were required for the NIE method. Some application examples using real datasets are provided to the detection ability of both methods.
PCB board heat transfer model based on heat transfer mechanism analysis
Authors: Gu S E , Xue D Z , Liang B , Chen L X 
Published: September 2021

Abstract
Temperature control plays a vital role in the circuit board production process. In order to control the temperature change in the reflow oven, we establish a differential equation model of the PCB heat transfer based on the theory of heat transfer and use the boundary conditions to solve the temperature distribution in the oven. We also accurately simulate the heating and cooling process of the PCB. According to the requirements for the shape of the oven temperature curve in actual production, we respectively use the heating factor and the area enclosed by the temperature as evaluation indicators, establish a target optimization model, and obtain the best set temperature for each temperature zone and the best transmission speed of PCB board. Through analysis of different cases, we could get the conclusion that the model in this paper is reasonable and effective.
A Study of Vehicle Vibration with Multiple Degrees of Freedom Using OCTAVE and ANSYS
Authors: Wray Alexander , Reed Jacob , Zhang Dr. Shengyong 
Published: September 2021

Abstract
Vibration vehicle models provide a great opportunity to integrate vehicle-based vibrations into a mechanical engineering vibrations course. This paper documents and discusses an approach to a multiple-degree-of-freedom (MDOF) in regards to pitch and bounce of the vehicle body with dampening and stiffness observed. The approach utilizes hand calculations, OCTAVE, and ANSYS to solve speed-bump induced vibration and to calculate vibrations modes. The problem involves a bicycle-model approach to a vehicle’s response when subject to a speed bump, or a sudden impulse load upon the forward-face of the model. These responses are captured and analyzed on pitch and bounce of the model at the center-of-gravity and the front/rear sides of the model. Graphical models capture responses of the loading conditions and the modal equations of the model providing a method of studying and understanding vibrational responses under provided stiffness. Using ANSYS as an approach of the model to capture damping response, further graphical models can be captured and used to describe motions of the vehicle model’s center-of-gravity, frontward and rearward wheel assembly, and the pitch (rotation) of the center-of-gravity to the introduced responses. A successful study with analysis of each graphical element and further dissemination of the results is concluded.
Wind-induced Vibration of High-rise Buildings and Its Countermeasures
Authors: Ke Chunxu 
Published: September 2021

Abstract
This article analyzes the cause of the wind-induced vibration, points out its harm, and finally introduces some countermeasures of it nowadays. To commence, it introduces the phenomenon called Buffeting, Vortex-excited Vibration and Self-excited Vibration that leads to the vibration. Then, it concludes that the vibration will lead to structural damage and make its residents uncomfortable through analyses, indicating that the vibration can be controlled by structural optimizing, aerodynamic measuring and equipping energy dissipation systems. This article simply introduces their principle and application.
Development of Vibration Base Health Monitoring in Bridge
Authors: Liu Jiachen 
Published: September 2021

Abstract
Vibration-based health monitoring uses non-destructive sensing technology to monitor and analyze changes in structural characteristics in time, frequency, or modal domains. The optimization of this system has always been the focus of the research community. Structural monitoring systems can start monitoring from building construction to destruction. It includes many kinds of methods and issues in different structure. This paper reviews the method of bridge structure damage identification based on vibration measurement that has been verified by the test. The use of the vibration excitation method is discussed, as well as the main issues currently. Structural monitoring systems determine that which and where damage is present in the structure, even the prediction of the remaining service life of the structure. In the field of civil engineering, structural monitoring systems have the potential to reduce economic losses and maintain modern infrastructure, even it may obvious geological changes to present disasters in the future.
How to utilize nobles’ houses in a conflicted area: an architectural case study in Baluwarti, a cultural tourism kampong at Surakarta Sunanate Palace
Authors: Marlina A , Astuti W , Cahyono U J 
Published: September 2021

Abstract
Cultural tourism is being intensified in every kampong (village) in Surakarta. Baluwarti is a cultural tourism kampong situated in the palace area where the nobles dwell. However, the internal conflict among these nobles affects the kampong’s tourism management system. Therefore, the main focus of this research is to find an architectural model of tourism management utilizing the nobles’ houses. This model, furthermore, is created by building synergy with stakeholders, initiated by communities in conflicted areas. Participatory Action Research in the form of FGD was performed to create a dialogue format with the community. Completeness of data and information were obtained through field observations, in-depth interviews and providing related documents. The result of the research displayed three models of tourism management in the conflicted area, namely: 1) The Management Model for Tourism Management in Restricted Areas, 2) The Development Model for Cultural Tourism Kampongs, 3) The Integration Model between Tourism Potential and Tourism Economic Activities. These models can be proposed to the government to encourage the development of heritage tourism industries in conflicted areas.
The concept of vortex convective storms
Authors: Plyusnin S D , Popova V P 
Published: September 2021

Abstract
It is proposed a method of analyzing the effects of the environmental vertical wind shear on the structure and dynamics of convective storms, the conditions for the occurrence of vortex storms based on the hydrodynamic laws of flow around of solid body in the Lagrangian coordinate system. There is described an example of the evolution of a supercell based on radar observations with the updated information of 3 minutes. It is shown the unity of the complex structure and dynamics, which allows proposing a typical model of vortex storms. The method of analysis affords to explain the sequential continuity of the types of storms, the prevalence of the right-propagation (in the Northern Hemisphere). It is proposed a classification of convective storms based on the interaction of the internally associated ascending flow and rotation with the environmental dynamic factor of wind shear.
Experimental studies of the aerosol spectrum at high-mountain conditions
Authors: Panchishkina I N , Petrova G G , Petrov A I , Chkhetiani O G 
Published: September 2021

Abstract
The paper considers variations in the number concentration of submicron aerosols, and size distribution of aerosol particles on the Shadzhatmaz plateau. The aerosol dimensional spectra were plotted according to the data obtained during hours with no cloudy factors in the atmosphere, and for the measurement periods when the clouds descended so low that the cloud masses were carried by the wind directly through the measurement site. A characteristic feature of the spectrum obtained in the presence of low foggy clouds is the decrease in the fraction of the smallest aerosols (0.1-0.2 μm), compared with the measurement in clear atmosphere conditions; at the same time, the concentration of larger aerosols (0.2 μm and more) under conditions when the observer noted the movement of cloud masses through the measurement site, turned out to be higher than that for clear atmosphere conditions.
Detection of features in the series of electric field strength measurements using data transformation and machine learning
Authors: Adzhieva’ A A , Shapovalov V A , Mashukov I Kh , Tokbaeva A A 
Published: September 2021

Abstract
Data transformation is a common information processing procedure that can detect features hidden in the data that are not visible in their original form. The article shows some examples of such processing to detect features in the data of long-term observations of the intensity of the surface atmospheric electric field. This uses the data of the EFM 550 field sensor installed in the city of Nalchik. The results are visualized using the Matplotlib Python library to visualize the results of such data processing. The selected data transformation methods are also well suited for machine learning. To demonstrate the possibilities of finding features, several methods of teaching without a teacher are used. It is noted that most of the identified features in the series of measurements of the surface atmospheric electric field are associated with local meteorological phenomena.