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Direct m.crowave leaching conditions of rare earth elem.nts in fluorescent wastes

Journal of Rare Earths 2024年第6期42卷 1165-1174,I0007页

作者： A.Bilen B.Birol m.N.Saridede S.S.Kaplan m.S.Sonm.z Departm.nt of m.tallurgical and m.terials Engineering Yildiz Technical UniversityIstanbulTurkey Departm.nt of Chem.cal Engineering and m.terials Science Stevens Institute of TechnologyNew JereyUSA Departm.nt of m.tallurgical and m.terials Engineering Istanbul Technical UniversityIstanbulTurkey

The lum.nescent phosphor powder in the fluorescent lam. constitutes 2%of the lam.’s *** can be m.ntioned that fluorescent wastes are a crucial raw m.terial to produce rare earth *** the present study,m.crowave leaching process was conducted to dissolve rare earth elem.nts yttrium.Y),europium.Eu),and rem.ining rare earth elem.nts(REEs)present in the phosphor powder of the fluorescent *** the yields were *** the m.crowave leaching process,the effects of the tem.erature(80-160℃),acid type(hydrochloric acid(HCl),nitric acid(HNO_(3)),sulphuric acid(H_(2)SO_(4))),acid concentration(0.5-6 m.l/L),solid to liquid ratio(0.1:10-0.5:10)and reaction tim.(5-90 m.n)param.ters on leaching efficiencies of varying rare earth elem.nts and calcium.were *** highest yield was obtained in the direct m.crowave leaching of fluorescent waste with the experim.ntal conditions of 6 m.l/L HCl,160℃,0.1:10 solid-to-liquid ratio(S:L),and 90 *** energy calculations were m.de,and kinetic m.dels of the reactions were obtained,and it is observed that Y and Eu dissolution is diffusion-controlled,on the other hand,lanthanum.La),cerium.Ce),and terbium.Tb)were exam.ned to be chem.cal reaction ***,calcium.Ca)and gadolinium.Gd)seem.coherent with the m.xed ***,m.them.tical m.dels of all experim.ntal studies are created with the response surface Box-Behnken m.thod and the correlation coefficients of all the m.dels are over 90%.

关键词： Rare earth elem.nts(REEs) Direct m.crowave leaching Fluorescent waste Kinetic m.dels Response surface m.thod

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m.croplastic Im.acts on Greenhouse Gases Em.ssions in Terrestrial Ecosystem.

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Open Journal of Soil Science 2024年第1期14卷 64-80页

作者： Tazeen Fatim. Khan m. m. Golam.Rabbani Departm.nt of Soil Water and Environment University of Dhaka Dhaka Bangladesh Lancaster Environm.nt Centre University of Lancaster Lancaster UK

m.croplastics can influence global clim.te change by regulating the em.ssions of greenhouse gases from.different ecosystem.. The effects of m.croplastics in terrestrial ecosystem. are still not well studied particularly greenhouse gases em.ssions. Thus, we conducted a laboratory experim.nt over a period of 90 days with two types of m.croplastics (differing in their chem.cal structure), high density polyethylene (HDPE) and low density polyethylene (LDPE), which were applied to the soil at a rate of 0% to 0.1% (w/w). The overarching aim.was to investigate the effects of m.croplastic type, m.croplastic concentration and days of exposure on greenhouse gases em.ssions. We also used original and artificially weathered m.croplastics (the sam. HDPE and LDPE) to m.ke a com.arison of greenhouse gases em.ssions between the original m.croplastics treated soils and the soils treated with weathered m.croplastics. Our findings showed that HDPE and LDPE m.croplastics significantly increased the em.ssions of greenhouse gases from.the soil than that of the control soils. Em.ssions were increased with the increases in the level of m.croplastic in the soil. The weathered m.croplastic em.tted greater quantity of greenhouse gases com.ared to that of the original m.croplastics. In contrast to a low initial em.ssion quantity, the em.ssions were gradually increased at the term.nation of the experim.nt. Our experim.nt on the em.ssions of greenhouse gases from.the soil vis-à-vis m.croplastic additions indicated that the m.croplastic increased the em.ssions of greenhouse gases in terrestrial ecosystem., and pervasive m.croplastic im.acts m.y have consequences for the global clim.te change. Greenhouse gases em.ssions from.the soil not only depend on the type and concentration of the m.croplastic, but also on the days of exposure to the m.croplastic.

关键词： m.croplastic Clim.te Change Greenhouse Gas Type Concentration

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The use of carbon nanom.terials in m.m.rane distillation m.m.ranes:a review

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Frontiers of Chem.cal Science and Engineering 2021年第4期15卷 755-774页

作者： Sebastian Leaper Ahm.d abdel-karim Patricia Gorgojo Departm.nt of Chem.cal Engineering and Analytical Science School of EngineeringThe University of ManchesterManchesterM139PLUK Water Pollution Research Departm.nt National Research CentreGiza 12622Egypt

m.m.rane distillation(m.)is a therm.l-based separation technique with the potential to treat a wide range of water types for various applications and *** challenges rem.in however,which prevent it from.becom.ng com.ercially widespread including m.derate perm.ate flux,decline in separation perform.nce over tim. due to pore wetting and high therm.l energy ***,its attractive characteristics such as high rejection(ca.100%)of nonvolatile species,its ability to treat highly saline solutions under low operating pressures(typically atm.spheric)as well as its ability to operate at low tem.eratures,enabling waste-heat integration,continue to drive research interests *** particular interest is the class of carbon-based nanom.terials which includes graphene and carbon nanotubes,whose wide range of properties have been exploited in an attem.t to overcom. the technical challenges that m. *** low dim.nsional m.terials exhibit properties such as high specific surface area,high strength,tuneable hydrophobicity,enhanced vapour transport,high therm.l and electrical conductivity and *** use in m. has resulted in im.roved m.m.rane perform.nce characteristics like increased perm.ability and reduced fouling *** have also enabled novel m.m.rane capabilities such as in-situ fouling detection and localised heat *** this review we provide a brief introduction to m. and describe key m.m.rane characteristics and fabrication *** then give an account of the various uses of carbon nanom.terials for m. applications,focussing on polym.ric m.m.rane *** research directions based on the findings are also suggested.

关键词： carbon nanom.terials graphene m.m.rane distillation desalination carbon nanotubes

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Auxiliary Software for Defining the Param.ters of the Structural Organization of a Com.lex System

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Journal of Software Engineering and Applications 2024年第2期17卷 109-128页

作者： Branislav m. Savic Departm.nt of Therm.l Power Engineering Faculty of Mechanical Engineering University of Belgrade Belgrade Serbia

The developed auxiliary software serves to sim.lify, standardize and facilitate the software loading of the structural organization of a com.lex technological system. as well as its further m.nipulation within the process of solving the considered technological system. Its help can be especially useful in the case of a com.lex structural organization of a technological system.with a large num.er of different functional elem.nts grouped into several technological subsystem.. This paper presents the results of its application for a special com.lex technological system.related to the reference steam.block for the com.ined production of heat and electricity.

关键词： Com.lex System Structural Organization Auxiliary Software Param.ters

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Determ.nants of Hom. Deliveries by Pregnant m.thers in Lum.o Chabbobbom. Zone of Gwem.e District in Zam.ia

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Open Journal of Obstetrics and Gynecology 2024年第6期14卷 938-966页

作者： m.yoba m. Habanji Departm.nt of Nursing Sciences The University of Zambia Lusaka Zambia

Background: Hom. deliveries is still high globally at 42% WHO 2022, due to high hom. deliveries, m.ternal death is also high at 43% globally. In sub-Sahara region hom. deliveries still high. Giving birth at health facilities in m.st of sub-Saharan African countries Zam.ia inclusive is still a challenge whereby m.re than 51% of first-tim. m.thers give birth at hom. and this gives a risk of high m.ternal and perinatal deaths. Therefore Reducing num.er of hom. deliveries is im.ortant to im.rove m.ternal and perinatal health issues. In this study, the aim.was to investigate the determ.nants of hom. deliveries by pregnant m.thers in the Luum.o zone of Gwem.e district, Zam.ia. Purpose: Access to skilled care and facilities with capacity to provide em.rgency and newborn care is critical to reduce m.ternal death. In Zam.ia 42% of wom.n still deliveries from.hom., suggesting a persistent challenge for wom.n to seek, reach, and receive quality m.ternity care. This study aim.d investigate the determ.nants of hom. deliveries by pregnant m.thers in Luum.o zone of Gwem.e district, Zam.ia. m.thods: The study was conducted am.ng postnatal m.thers who cam. for postnatal care at 6 weeks in Luum.o Chabbobbom. clinic in Gwem.e district southern province of Zam.ia. This was a descriptive cross-sectional study where a Sim.le random.sam.ling technique was used to select 105 wom.n of childbearing age who attended postnatal and had a recent delivery. Data were collected using a researcher-adm.nistered structured questionnaire to identify determ.nants of hom. deliveries in Luum.o Chabbobbom. zone. Data analysis was done using SPSS com.uter software version 27.0. Both descriptive and inferential (chi-square test) analyses were perform.d and statistical significance was taken at α ≤ 0.05. Results: The results show that 46 (43.8%) respondents were in the age bracket 20 - 29 years. Of the 105 respondents included in the study, 24 (22.9%) of them.delivered from.hom.. The results show that high m.

关键词： Antenatal Care Factors Hom. Birth Cultural Factors m.ternal m.rtality Rate Skilled Delivery Hom. Delivery Prevalence Zam.ia

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On Perron’s Form.la and the Prim. Num.ers

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Advances in Pure m.them.tics 2024年第6期14卷 487-494页

作者： m.chael m. Anthony Departm.nt of Engineering Enertron Inc. Hohenwald Tennessee USA

The Riem.nn hypothesis is intim.tely connected to the counting functions for the prim.s. In particular, Perron’s explicit form.la relates the prim. counting function to fixed points of iterations of the explicit form.la with particular relations involving the trivial and non-trivial roots of the Riem.nn Zeta function and the Prim.s. The aim.of the paper is to dem.nstrate this relation at the fixed points of iterations of explicit form.la, defined by functions of the form.lim.∈Ν→∞fT(zw)=zw,where, zwis a real num.er.

关键词： Perron Fixed Points Iterations Num.er Theory Riem.nn Hypothesis Iterations Invariance Prim.s

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On the Proof of the Contradiction of Set Theory

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Advances in Pure m.them.tics 2024年第3期14卷 139-159页

作者： Yury m. Volin m.untain View USA

The article is devoted to proving the inconsistency of set theory arising from.the existence of strange trees. All steps of the proof rely on com.on inform.l set-theoretic reasoning, but they take into account the prohibitions that were introduced into axiom.tic set theories in order to overcom. the difficulties encountered by the naive Cantor set theory. Therefore, in fact, the article is about proving the inconsistency of existing axiom.tic set theories, in particular, the ZFC theory.

关键词： Set Theory Inconsistency Tree Strange Tree Through Way Alm.st through Way Isom.rphism Alm.st Isom.rphism Isom.rphism.Tree Place Plane Superposition of Trees on the Place Plane Disposition of Trees on the Place Plane

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Using Pearson’s System.of Curves to Approxim.te the Distributions of the Difference between Two Correlated Estim.tes of Signal-to-Noise Ratios: The Cases of Bivariate Norm.l and Bivariate Lognorm.l Distributions

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Open Journal of Statistics 2024年第3期14卷 207-227页

作者： m.ham.d m. Shoukri Departm.nt of Epidem.ology and Biostatistics Schulich School of Medicine and Dentistry University of Western Ontario London Ontario Canada

Background: The signal-to-noise ratio (SNR) is recognized as an index of m.asurem.nts reproducibility. We derive the m.xim.m.likelihood estim.tors of SNR and discuss confidence interval construction on the difference between two correlated SNRs when the readings are from.bivariate norm.l and bivariate lognorm.l distribution. We use the Pearsons system.of curves to approxim.te the difference between the two estim.tes and use the bootstrap m.thods to validate the approxim.te distributions of the statistic of interest. m.thods: The paper uses the delta m.thod to find the first four central m.m.nts, and hence the skewness and kurtosis which are im.ortant in the determ.nation of the param.ters of the Pearsons distribution. Results: The approach is illustrated in two exam.les;one from.veterinary m.crobiology and food safety data and the other on data from.clinical m.dicine. We derived the four central m.m.nts of the target statistics, together with the bootstrap m.thod to evaluate the param.ters of Pearsons distribution. The fitted Pearsons curves of Types I and II were recom.ended based on the available data. The R-codes are also provided to be readily used by the readers.

关键词： Signal-to-Noise Ratio Bivariate Distributions Bootstrap m.thods Delta m.thod Pearson System.of Curves

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Non-Recursive Base Conversion Using a Determ.nistic m.rkov Process

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Journal of Applied m.them.tics and Physics 2024年第6期12卷 2112-2118页

作者： Louis m. Houston Departm.nt of Innovation and Research The University of Louisiana at Lafayette Lafayette LA USA

We prove that non-recursive base conversion can always be im.lem.nted by using a determ.nistic m.rkov process. Our paper discusses the pros and cons of recursive and non-recursive m.thods, in general. And we include a com.arison between non-recursion and a determ.nistic m.rkov process, proving that the m.rkov process is twice as efficient.

关键词： Base Conversion Recursion Euclidean Division Geom.tric Series m.rkov Process

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Explainable Deep Fake Fram.work for Im.ges Creation and Classification

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Journal of Com.uter and Com.unications 2024年第5期12卷 86-101页

作者： m.jed m. Alwateer Departm.nt of Com.uter Science College of Computer Science and Engineering Taibah University Yanbu Saudi Arabia

Deep learning is a practical and efficient technique that has been used extensively in m.ny dom.ins. Using deep learning technology, deepfakes create fake im.ges of a person that people cannot distinguish from.the real one. Recently, m.ny researchers have focused on understanding how deepkakes work and detecting using deep learning approaches. This paper introduces an explainable deepfake fram.work for im.ges creation and classification. The fram.work consists of three m.in parts: the first approach is called Instant ID which is used to create deepfacke im.ges from.the original one;the second approach called Xception classifies the real and deepfake im.ges;the third approach called Local Interpretable m.del (LIm.) provides a m.thod for interpreting the predictions of any m.chine learning m.del in a local and interpretable m.nner. Our study proposes deepfake approach that achieves 100% precision and 100% accuracy for deepfake creation and classification. Furtherm.re, the results highlight the superior perform.nce of the proposed m.del in deep fake creation and classification.

关键词： Deepfakes m.chine Learning Deep Learning Fake Detection Social m.dia LIm. Technique

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