bluuebunny/crossref_metadata_2025_split huggingface dataset:
Period spacings of gravity modes in rapidly rotating magnetic stars
Authors: Prat V. , Mathis S. , Neiner C. , Van Beeck J. , Bowman D. M. , Aerts C. 
Published: March 2020

Context.Stellar internal magnetic fields have recently been shown to leave a detectable signature on period spacing patterns of gravity modes.Aims.We aim to investigate the effect of the obliquity of a mixed (poloidal and toroidal) dipolar internal fossil magnetic field with respect to the rotation axis on the frequency of gravity modes in rapidly rotating stars.Methods.We used the traditional approximation of rotation to compute non-magnetic modes, and a perturbative treatment of the magnetic field to compute the corresponding frequency shifts. We applied the new formalism to HD 43317, a magnetic, rapidly rotating, slowly pulsating B-type star, whose field has an obliquity angle of about 80°.Results.We find that frequency shifts induced by the magnetic field on high-radial-order gravity modes are larger with increasing obliquity angle, when the magnetic axis is closer to the equatorial region, where these modes are trapped. The maximum value is reached for an obliquity angle of 90°. This trend is observed for all mode geometries.Conclusions.Our results predict that the signature of an internal oblique dipolar magnetic field is detectable using asteroseismology of gravity modes.
The development of e-commerce infrastructure in modern conditions
Authors: Akhmetova Zaures , Baimukhanbetova Elmira , Belgozhakyzy Moldir , Alikbaeva Ainur , Tulebaeva Nazym 
Published: March 2020

The article explores the e-commerce infrastructure. The factors that influence the development of e-commerce are highlighted. The relevance of the role of e-commerce in the world economy is gaining its importance and the use of electronic virtual tools in modern conditions has shown the result of the experience of developed countries which brings efficiency to any country or industry.
It is proved that for the application of effective methods of e-commerce development it begins with the construction of its infrastructure, which contains factors affecting the development of this industry. The study also examines the trend and prospects for the development of electronic commerce in Kazakhstan. The dynamics of foreign countries is shown. The e-commerce development tools are considered, some problems of the development of the e-commerce infrastructure are identified and ways to solve them are proposed.
Endobiliary radiofrequency ablation combined with bilateral metal stent placement for malignant hilar biliary obstruction
Authors: Inoue Tadahisa , Ibusuki Mayu , Kitano Rena , Kobayashi Yuji , Ohashi Tomohiko , Nakade Yukiomi , Sumida Yoshio , Ito Kiyoaki , Yoneda Masashi 
Published: March 2020

Abstract
Background The effectiveness of endobiliary radiofrequency ablation (RFA) is still uncertain, especially in patients with malignant hilar biliary obstruction (MHBO). We examined the efficacy of endobiliary RFA followed by bilateral self-expandable metal stent (SEMS) placement for unresectable MHBO.
Methods 41 patients met the eligibility criteria for study inclusion. We evaluated the technical success, functional success, and recurrent biliary obstruction (RBO) associated with RFA with bilateral SEMS placement.
Results The technical and functional success rates were both 95.1 % (39/41). The RBO rate was 38.5 % (15/39), and the median time to RBO was 230 days. Stricture length was positively correlated with time to RBO in the multivariate analysis (P = 0.03). The median time to RBO was significantly longer in patients with strictures > 15 mm in length than in those with strictures ≤ 15 mm (314 vs. 156 days; P = 0.02).
Conclusions The present study showed that endobiliary RFA with bilateral SEMS placement achieved good results, but selection of patients with an appropriate stricture length may be needed to obtain a sufficient ablative effect.
Nível de satisfação e dor na retirada de fixador externo em um ambulatório
Authors: Pereira Vitor Luis , Minami Flavio Kazuo , Lima Geraldo Kalif , Spalatti Vitor , Boatto Hilário , Lucarelli Jose 
Published: March 2020

Resumo
Objetivo Quantificar os níveis de satisfação e dor dos pacientes submetidos a retirada ambulatorial de fixadores externos sem anestesia.
Métodos Estudo prospectivo envolvendo 28 pacientes usando fixadores externos submetidos a três questionários associados à Escala Visual Analógica e Numérica da dor durante diferentes etapas da retirada.
Resultados A média de dor prévia à retirada foi de 3,61. Logo após o término do procedimento, encontramos média de 6,68 para a dor mais intensa, e de 2,25 para a dor menos intensa. A variação da dor média foi de 4,43, e a dor após uma semana teve média de 2,03. A lembrança dolorosa da retirada foi menor do que a dor referida imediatamente após a retirada (média de 5,29). A predominância no estudo foi de pacientes do sexo masculino de meia-idade, e 89,3% usavam fixador externo do tipo circular. O principal segmento dos membros envolvido foi a perna, e a maior parte dos pacientes não havia feito uso de fixador externo previamente (71,4%); eles optaram pela retirada ambulatorial por se tratar de opção mais rápida (75%), e para evitar internação hospitalar (25%). O momento de dor mais intensa ocorreu durante a retirada dos pinos de Schanz (60,7%), sendo pior nas extremidades dos membros para 75% dos entrevistados. Uma maioria absoluta de 85,7% mostrou-se satisfeita após a retirada, e 82,1% afirmaram que se submeteriam novamente ao procedimento.
Conclusão A retirada ambulatorial de fixadores externos sem anestesia é uma opção bem tolerada pelos pacientes, tratando-se de um procedimento com bons níveis de aceitabilidade e satisfação.
Perioperative Fracture Risk and Two-Year Survivorship of a Short Tapered Femoral Stem following Direct Anterior Approach Cementless Total Hip Arthroplasty with a Fracture Table
Authors: Andrews Samantha , Harbison Gregory J. , Hasegawa Ian , Unebasami Emily , Nakasone Cass 
Published: March 2020

AbstractThe cementless, tapered wedge, short femoral stem implant is commonly used in direct anterior approach (DAA) total hip arthroplasty (THA). The lack of access and visualization, however, may increase the risk of perioperative fracture and early failure. Therefore, the current study examined perioperative complications and 2-year implant survivorship following DAA THA performed using a fracture table and short, tapered wedge femoral stem. A retrospective analysis was conducted on patients having undergone DAA THA with a cementless, tapered wedge, short femoral stem. Perioperative fractures were noted and survivorship was determined by the incidence of revision surgery within a minimum 2-year follow-up period. A total 366 consecutive patients (441 hips) were identified in the cohort. Four patients (6 hips; 1.4%) were lost to follow-up and three patients died from unrelated causes. Average follow-up time for the remaining 359 patients (435 hips) was 32.9 ± 10.2 months. There were no intraoperative factures but three perioperative fractures within two weeks. Aseptic loosening occurred in one stem at 13 months, resulting in a 99.1% survival rate with a mean survival time of 23.8 ± 0.1 months (95% confidence interval: 23.6–24.0 months). The use of a short, tapered wedge femoral stem and a fracture table for DAA THA resulted in 0.7% periprosthetic fractures and only one aseptic loosening within 2 years. These results suggest that proper femoral exposure with the use of a fracture table and a short, tapered wedge femoral stem does not appear to increase the risk of periprosthetic femoral fracture.
Supplementary pressure comparison from (0.7 to 7) MPa in gas media at gauge mode
Authors: Durgut Y , Yilmaz R , Justice B K , Alotaibi H M , Alanazi N A 
Published: March 2020

This report gives the results of a comparison of pressure standards of three National Metrology institutes in the range of 0.7 MPa to 7 MPa. This comparison was piloted by UME and was carried out from February 2017 to March 2019. This work is a part of the GULFMET project and is registered as a supplementary comparison GULFMET.M.P-S1. The transfer standard used was a digital pressure gauge, model 745-1K, serial number 114944, manufactured by Paroscientific Inc, with a resolution of 1 hPa. The reference values have been determined from the weighted mean of the deviations which is a measurement error of the test instrument reported by the participants for each specified pressure.

Main text

To reach the main text of this paper, click on Final Report. Note that this text is that which appears in Appendix B of the BIPM key comparison database kcdb.bipm.org/.
The final report has been peer-reviewed and approved for publication by the CCM, according to the provisions of the CIPM Mutual Recognition Arrangement (CIPM MRA).
Calibration model for air quality data
Authors: Duan Luling , Duan Ninggui 
Published: March 2020

Abstract
This article focused on the National Monitoring and control stations and selfbuilt two dust four gas, and the data were analysed, taking into account the humidity, temperature, wind speed, pressure, precipitation of the five meteorological factors, the difference between the two data analysis, and made the establishment of a mathematical model, the self-built Point data was calibrated.
Air Pollution and Environmental Implications in Kano Metropolis Nigeria
Authors: Abdullahi Hashim , Sinniah Gobi Krishna , Siong Ho Chin , Wei Li Rui 
Published: March 2020

Abstract
The study employed both quantitative and experimental approaches, CO and CO2 was sensed and recorded with the aid of Carbon Monoxide Analyzer and Handheld GPS. Four hundred (400) structured questionnaires was administered and Volumetric traffic count was conducted along seven (7) major junctions across the study area. E. View 8 was adopted for the analysis. Carbon Sensing results depict that Fagge local government area recorded the highest out door CO of 012Ppm. On the other hand, Gwale local government is the top indoor carbon emitters with10Ppm. The field survey indicates that types of land uses, densities and nature of socio-economic activities significantly affect both CO and CO2 in the metropolis. It indicates that Tarauni local Dangi Junction’s average daily carbon sensed records is the highest with exactly 19.5 Ppm. Fagge, Dala and Gwale local governments areas precisely record the same of 14 Ppm. The quantitative air quality indicators demonstrate that, the coefficient of determination (R2) reveals that relatively 84% of the changes in the dependent variable (DV) environmental impact was fully captured in the study and therefore changes within the explanatory variables have significant environmental impacts. Traffic count result shows that, Nasarawa local governemnt maintains the most traffic flow with 18957 vehicles records within the study days and the study indicates that interaction of traffic flow in the metropolis significantly increases the air pollution. Recommendation is drawn from the identified issues.
Optimization of the degradation conditions of swine wastewater and microbial community structure analysis in immobilized microbial technology
Authors: Wang Ying , Sun Xuefei , Chang Yuge , Quan Yue , Jin Mingji 
Published: March 2020

Abstract
In this paper, the treatment characteristics of immobilized microbial technology on swine wastewater under different operating conditions were investigated, so as to optimize the operating conditions of the system. At the same time, the microorganism community structure in the optimal condition was analyzed by high throughput sequencing technology. As a results, the optimal conditions for the degradation of TN in swine wastewater by immobilized microorganism were the filling rate of 25%, HRT of 27.5h and C/N of 5.48. In this case, the actual value of the TN removal rate was 74.81%. With the operation of the system, the abundance and diversity of the microbial community in the system are decreased, while the diversity and abundance of the microbial community in the denitrification tank are generally higher than that in the nitrification tank. Proteobacteria and Bacteroidetes are the dominant bacterial phylum, Hydrogenophaga are the dominant bacterial genus. The function of microbial community in the system is mainly "Metabolism".
Study on the Secondary Pollution of Building Fire Water Storage and Domestic Water
Authors: Duan Chunyi , Chen Hong 
Published: March 2020

Abstract
In order to solve the maintenance and management problems of the fire water tank in the fire water supply system, the problem of how to prevent the secondary pollution of domestic water by using the water source for fire storage water and domestic water is discussed. The countermeasures and the concept of intrinsic safety using shared fire-fighting water tanks are proposed, and it is clear that fire-fighting pools (boxes) need to strengthen water quality and the intrinsic safety of the pools. The innovative construction of the fire water tank system architecture is conducive to improving the reliability of fire water supply for buildings.
Discussion on water saving technology of building water supply and drainage
Authors: Zhao Li , Li Yong , Zhang Miao , Qin Faming 
Published: March 2020

Abstract
According to the present situation of building water supply and drainage, water saving technology of building water supply and drainage is analyzed, and the effective utilization of water resources is realized. Water saving technology mainly includes the reasonable limit water pressure point, to avoid pressure flow; improve water supply system and reduce the invalid water; using water-saving water distribution equipment, sanitary ware; promote the use of high quality pipeline and valve; improve the status of the fire pool construction and development and promote the regeneration of water and rainwater utilization technology.
Practical application of domestic sewage in a new compound biological filter
Authors: Gao Hua , Ma Chennan 
Published: March 2020

Abstract
The application of a new composite biofilter with a batch-type mud membrane composite biofilter (CSBF) series deep treatment filter (EBF) combination in urban domestic sewage was studied. The results of 20-day operation data show that the new filter process has good removal effect on COD, NH3-N, TN and TP. The average removal rate of COD during operation is 94.63%, the average removal rate of NH3-N is 99.02%, and the average removal rate of TN is 77.89%. The average removal rate of TP is 97.99%, and each index is stable to the first-class A standard of GB8978-1996, in which COD, NH3-N and TP can reach the surface water class IV standard.
The design of coal mine water disasters prevention and control assistance decision system
Authors: Xu Jiangtao , Sun Chengyong 
Published: March 2020

Abstract
According to actual situation of coal mine water disasters and the expert system research survey, the author has proposed the overall structure of the assistance decision system. The author has established the coal mine water disasters assistance decision platform based on dot NET soft. We has realized the formulation of determination and the preventing and controlling measure of the flood of old hole, roof, floor by using dot Net soft and the CLIPS computer language, combining with database platform established the expert knowledge library and the inference library; has solved the time and the spatial disposition question of the most superior sparse water volume by using the methods of finite element and the linear programming; Moreover aims at these questions of the note thick liquid, searching and draining water, the setup of waterproof rock seam, the forecast of water inflow volume, we has produced the correlation computational methods result and the operation craft.
Towards understanding the stabilization process in vermicomposting of excess sludge under copper oxide nanoparticles stress using PARAFAC analysis of fluorescence spectra
Authors: Wang Yong , Ma Liang , Xu Chenglin , Zhao Yue , Zhu Linxu , Chen Junru , Mu Hui , Guo Weilin , Zhao Chunhui 
Published: March 2020

Abstract
In this study, fluorescence excitation-emission matrix (EEM) combined with parallel factor analysis (PARAFAC) was employed to trace the behaviour of dissolved organic matter during vermicomposting of excess sludge under four dosages (0, 400, 800, 1600 mg/kg-TSS) of copper oxide nanoparticles (CuO NPs) stress. Determination of dissolved organic carbon (DOC) and total content of organic carbon (TOC), available nitrogen and available phosphorous indicated the presence of CuO NPs decrease the sludge stabilization by vermicomposting, but the organics degradation efficiency was not significantly inhibited with the increase of CuO NPs concentration. Fluorescence spectra results of dissolved organic matter (DOM) during the four groups of vermicomposting indicated CuO NPs led to the reduce of humic acid-like materials in vermicomposting. The positive relationship of protein-like component 1 and negative relationship of humic-like component 2 with CuO NPs concentrations in the substrates reflected by PARAFAC analysis suggested CuO NPs inhibit transformation of humic-like maters during the vermicomposting.
Research on Pollution Control of Solid Waste in China
Authors: Liu Qi 
Published: March 2020

Abstract
Solid waste is some solid and semi-solidified waste objects produced in production and other activities in our lives, typical of which are industry, agricultural, life and dangerous solid waste. Due to the restrictions on conditions and objects themselves, some objects cannot be used in production and will become waste in mankind activities, so the existence of solid waste is unavoidable. Therefore, it is impossible to stop the production of solid waste. However, it cannot be abandoned either. Instead, it is necessary to carry out proper disposal to effectively prevent secondary pollution.
The Ecological Risk Assessment of PPCPs Based on Different Endpoints in Urban Rivers from The Pearl River
Authors: Zhu Guanyu , Su Yan , Zhang Yang , Han Jingcheng , Wu Xiaofeng , Gao Yinliang 
Published: March 2020

Abstract
With rapid development of the cities along the Pearl River, the ecological system of urban rivers is being threatened by pharmaceuticals and personal care products (PPCPs). In this study, the distribution of four common PPCPs triclocarban, diclofenac, ibuprofen and triclosan was summarized from literatures and the ecological risk of the PPCPs in surface water of urban rivers from the Pearl River was evaluated based on six different endpoints. Among these PPCPs, ibuprofen was the most predominant compound with the highest concentration of 1417 ng/L, and triclocarban had the lowest PNECs of 2.4 ng/L derived from reproduction toxic data. Additionally, PNECs of diclofenac and triclocarban derived from reproduction toxic data were lower than those derived from other effects, while the PNECs of ibuprofen and triclosan derived from biochemical toxic data (endocrine disruption effect) were lower than those derived from other effects. All the PPCPs exhibited high risk on certain effects, especially for triclocarban exhibited high ecological risk on cellular, growth, mortality and reproduction of aquatic life. The results demonstrated that triclocarban, diclofenac, ibuprofen and triclosan had adverse effects on aquatic life in the Pearl River and actions needed to be taken for PPCPs, especially for triclocarban.
Discussion on Treatment Technology of Overflowing Waste Gas in Silicone Desulfurization Regeneration Tank
Authors: Deng Jianguo , Zhou Junbo , Gao Liping , Zhang Yongle , Niu Yongsheng 
Published: March 2020

Abstract
During the process of removing the sulfur-containing gas in the semi-aqueous gas by using the rubber desulfurization process, a large amount of exhaust gas overflows from the top of the rubber desulfurization regeneration tank, which has a heavy odor. After testing, the exhaust gas contains a large amount of carbonyl sulfur (COS), ethanethiol (CH3CH2SH), volatile phenols and other volatile organic gases (VOCs), which has a certain toxicity, volatile and complex chemical composition, causing harm to the surrounding and operators. However, there is no stable, single, and effective exhaust gas treatment for the exhaust gas overflowing from the tannin desulfurization regeneration tank. Characteristics of the exhaust gas generated during the production process of the semi-water gas desulfurization and oxidation regeneration tank is studied in this paper. After process designed, debugged, optimized, and inspected repeatedly, the method of “washing absorption + condensation removal of water + filter + fan + activated carbon adsorption” is proposed. When the exhaust gas outlet concentration is 542mg/m3, the gas outlet concentration is 58.1mg/m3 and the processing system efficiency achieve 89.28% after debugged stably, which has reached the local environmental protection emission limit (120mg/m3).
Variability in PM2.5 and meteorological effects on their mass concentrations over Fuzhou, China during 2014-2016
Authors: Li Junyi , Huang Yulin , Sun Danmei , Xu Zhixin , Lan Yuxiang , Chen Ye , Dong Jianwen 
Published: March 2020

Abstract
Simultaneous measurements of mass concentrations of PM2.5 along with other co-existence pollutants viz., SO2, CO, NO2 and O3, were studied with hourly datasets and the data of meteorological conditions were measured per 3 hours from 1st Sep 2014 to 30th Sep 2016 at Fuzhou city, China. The concentration of PM2.5 is 28.42 ± 14.75 in the study period. Meanwhile, the seasonal ratio of PM2.5 was also analysed, with the maximal value as 0.61 in winter, 0.52 in spring, 0.49 in autumn and 0.44 in summer. This implied that fine particulate reaches the maximal value in winter and the minimum value in summer. The correlation coefficient between concentrations of PM2.5 and SO2, CO, NO2, and O3 concentrations were 0.64, 0.52, 0.53 and 0.67. There existed negative correlation between PM2.5 and T (– 0.27), HCC (– 0.13), WS (– 0.16), VIS (– 0.46), DT (-0.31) and RF (-0.10). Subsequently, the impacts of typhoons on the mass concentrations of PM2.5 during September 10th 2016 to September 16th 2016 were analyzed during which the mass concentration of PM2.5 decreased at a large extent and the fine particulates have more prominent changes during the typhoon period compared with coarse particulates.
Numerical simulation of toxic gas diffusion in confined space
Authors: Yue Yicen 
Published: March 2020

Abstract
In this paper, the numerical simulation method is used to study the gas diffusion in a limited space under the scene of poisonous gas attack or leakage. Based on the STAR-CCM + software, the toxic gas diffusion process in a limited enclosed space under specific flow field conditions was simulated and analyzed, and the effects of different wind speeds on the diffusion law and concentration field distribution were studied.
Environmental Behavior of Petroleum in Soil and its Harmfulness Analysis
Authors: Hu Mengxue 
Published: March 2020

Abstract
The environmental behavior of rock and oil pollutants in soil has always been the focus of environmental protection research. In this paper, the sources, hazards and existing states of the stone oil pollutants in the soil are briefly introduced, and their migration, adsorption and degradation behaviors in the soil, as well as their behavior characteristics and influencing factors are also introduced. It is of great significance to protect the ecological environment and promote the sustainable development of petroleum industry to fully understand the environmental behavior of stone and oil pollutants in soil.