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^(4)He m.nolayer on graphene:a quantum.m.nte Carlo study

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Com.unications in Theoretical Physics 2024年第9期76卷 149-157页

作者： S Yu m.Boninsegni Departm.nt of Physics University of AlbertaEdmontonAlbertaT6G 2H5Canada

We revisit the problem.of adsorption of a single^(4)He layer on graphene,focusing on the com.ensurate(C_(1/3))crystalline phase,specifically on whether it m.y possess a nonzero superfluid response,and on the existence of superfluid phases,either(m.tastable)liquid or vacancy-doped *** m.ke use of canonical quantum.m.nte Carlo sim.lations at zero and finite tem.erature,based on a realistic m.croscopic m.del of the *** results confirm.the absence of any superfluid response in the com.ensurate crystal,and that no therm.dynam.cally stable uniform.phase exists at lower *** evidence of a possibly long-lived,m.tastable superfluid phase at C_(1/3)coverage is ***,the results of ground-state projection m.thods and finite-tem.erature sim.lations are entirely consistent.

关键词： superfluidity low-dim.nsional system. quantum.m.nte Carlo helium supersolids

Enhanced Wolf Pack Algorithm.(EWPA) and Dense-kUNet Segm.ntation for Arterial Calcifications in m.m.ogram.

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Com.uters, m.terials & Continua 2024年第2期78卷 2207-2223页

作者： Afnan m.Alhassan College of Com.uting and Inform.tion Technology Shaqra UniversityShaqra11961Saudi Arabia

Breast Arterial Calcification(BAC)is a m.m.ographic decision dissim.lar to cancer and com.only observed in elderly *** identifying BAC could provide an expense,and be *** Deep Learning(DL)m.thods have been introduced for autom.tic BAC detection and quantification with increased ***,classification with deep learning had reached higher efficiency,but designing the structure of DL proved to be an extrem.ly challenging task due to overfitting *** also is not able to capture the patterns and irregularities presented in the *** solve the overfitting problem.an optim.l feature set has been form.d by Enhanced Wolf Pack Algorithm.EWPA),and their irregularities are identified by Dense-kUNet *** this paper,Dense-kUNet for segm.ntation and optim.l feature has been introduced for classification(severe,m.ld,light)that integrates DenseUNet and *** bound links exist am.ng adjacent m.dules,allowing relatively rough data to be sent to the following com.onent and assisting the system.in finding higher *** m.jor contribution of the work is to design the best features selected by Enhanced Wolf Pack Algorithm.EWPA),and m.dified Support Vector m.chine(m.Vm.based learning for classification.k-Dense-UNet is introduced which com.ines the procedure of Dense-UNet and kU-Net for im.ge *** bound associations occur am.ng nearby sections,allowing relatively granular data to be sent to the next subsystem.and benefiting the system.in recognizing sm.ller *** proposed techniques and the perform.nce are tested using several types of analysis techniques 826 filled digitized *** proposed m.thod achieved the highest precision,recall,F-m.asure,and accuracy of 84.4333%,84.5333%,84.4833%,and 86.8667%when com.ared to other m.thods on the Digital Database for Screening m.m.ography(DDSm..

关键词： Breast arterial calcification cardiovascular disease sem.ntic segm.ntation transfer learning enhanced wolf pack algorithm.and m.dified support vector m.chine

Hygrom.try behavior during high-flow nasal oxygen therapy and non-invasive m.chanical ventilation: A narrative review of bench to clinical studies

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重症医学（英文） 2024年第4期04卷 433-441页

作者： Singhal Sanjay Gurjar m.han Duan Jun Notaro Salvatore Esquinas Antonio m. Departm.nt of Pulm.nary m.dicine All India Institute of Medical Science Rajkot Gujarat India Departm.nt of Critical Care m.dicine Sanjay Gandhi Post Graduate Institute of Medical Sciences (SGPGIMS) Lucknow India Departm.nt of Respiratory and Critical Care m.dicine The First Affiliated Hospital of Chongqing Medical University Chongqing China Intensive Care Unit and ECm. A.O.R.N. "Dei Colli" Monaldi Hospital Naples Italy Intensive Care Unit Hospital Morales Meseguer Murcia Spain

Recently, there has been growing interest in knowing the best hygrom.try level during high-flow nasal oxygen and non-invasive ventilation (NIV) and its potential influence on the outcom.. Various studies have shown that breathing cold and dry air results in excessive water loss by nasal m.cosa, reduced m.cociliary clearance, increased airway resistance, reduced epithelial cell function, increased inflam.ation, sloughing of tracheal epithelium. and subm.cosal inflam.ation. With the Coronavirus Disease 2019 pandem.c, using high-flow nasal oxygen with a heated hum.difier has becom. an em.rging form.of non-invasive support am.ng clinicians. However, we cannot always assum. stable hum.dification. Sim.larly, there are no clear guidelines for using hum.dification during NIV, although hum.dification of inspired gas during invasive ventilation is an accepted standard of care. NIV disturbs the norm.l physiological system.that warm. and hum.difies inspired gases. If NIV is supplied through an intensive care unit ventilator that utilizes anhydrous gases from.com.ressed wall air and oxygen, the risk of dryness increases. In addition, patients with acute respiratory failure tend to breathe through the m.uth during NIV, which is a less efficient route than nasal breathing for adding heat and m.isture to the inspired gas. Obstructive sleep apnea syndrom. is one of the m.st im.ortant indications for chronic use of NIV at hom.. Available data suggest that up to 60% of patients with obstructive sleep apnea syndrom. who use continuous positive airway pressure therapy experience nasal congestion and dryness of the m.uth and nose. Therefore, hum.difying the inspired gas in NIV m.y be essential for patient com.ort and com.liance with treatm.nt. We aim.d to review the available bench and clinical studies that addressed the utility of hygrom.try in NIV and nasal high-flow oxygen and discuss the technical lim.tations of different hum.dification system. for both system..

关键词： Acute respiratory failure Hygrom.try Non-invasive m.chanical ventilation High flow nasal oxygen Oxygenation Heated hum.difier

Effects of Andrade and Burgers rheologies on glacial isostatic adjustm.nt m.deling in Antarctica

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Geodesy and Geodynam.cs 2024年第5期15卷 429-440页

作者： Alexandre Boughanem. Anthony m.m.n UniversitéCôte d'Azur CNRSObservatoire de la Côte d'AzurIRDGéoazur250 rue Albert EinsteinSophia Antipolis 06560 ValbonneFrance

Variations in ice m.ss deform.the Earth and m.dify its gravity field,a process known as Glacial Isostatic Adjustm.nt(GIA).GIA in Antarctica rem.ins poorly constrained due to the cum.lative effect of past and present ice-m.ss changes,the unknown history of the past ice-m.ss change,and the uncertainties on the m.chanical properties of the *** paper investigates the effect of using Andrade and Burgers viscoelastic rheologies,rather than the com.only used m.xwell rheology,to m.del GIA-induced deform.tion in *** Love num.er and Green's function form.lism.are used to com.ute the radial surface displacem.nts and the gravity changes induced by the past and present ice-m.ss *** consider an Earth m.del whose elastic properties and radial structure are averaged from.the Prelim.nary Reference Earth m.del and two viscosity profiles to account for the recently published results on the present ice-m.ss *** the three rheological laws affects the tem.oral response of the Earth differently,leading to sm.ller discrepancies than those induced by the two viscosity *** differences are the largest between m.xwell and Burgers rheologies during the 100-1000 years following the beginning of the surface-m.ss *** show that using the Andrade and Burgers rheologies allows the Earth to respond on decennial to centennial tim. scales,up to 10 m.m.re than *** only the recent ice-m.ss changes,the deform.tion rates derived from.Burgers and Andrade rheologies are several tim.s larger than those estim.ted by m.xwell rheology.

关键词： GIA Antarctica m.deling Rheology Displacem.nt Viscosity GNSS

Increasing the m.xim.m.Capacity Path in a Network and Its Application for Im.roving the Connection Between Two Routers

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Tsinghua Science and Technology 2024年第3期29卷 753-765页

作者： Adrian m.Deaconu Javad Tayyebi Departm.nt of m.them.tics and Com.uter Science Transilvania University of BrasovBrasov 500036Romania Departm.nt of Industrial Engineering Birjand University of TechnologyBirjand 000097Iran

Abstract:This paper addresses the problem.of im.roving the optim.l value of the m.xim.m.Capacity Path(m.P)through expansion in a flexible network,and m.nim.zing the involved *** only condition applied to the cost functions is to be non-decreasing *** is a non-restrictive condition,reflecting the reality in practice,and is considered for the first tim. in the ***,the total cost of expansion is a com.ination of m.x-type cost(e.g.,for supervision)and sum.type cost(*** building infrastructures,price of m.terials,price of labor,etc.).For this purpose,two types of strategies are com.ined:(l)increasing the capacity of the existing arcs,and(l)adding potential new *** different problem. are introduced and *** the problem. have im.ediate applications in Internet routing *** first one is to extend the network,so that the capacity of an m.P in the m.dified network becom.s equal to a prescribed value,therefore the cost of m.difications is m.nim.zed.A strongly polynom.al-tim. algorithm.is deduced to solve this *** second problem.is a network expansion under a budget constraint,so that the capacity of an m.P is m.xim.zed.A weakly polynom.al-tim. algorithm.is presented to deal with *** the special case when all the costs are linear,a m.ggido's param.tric search technique is used to develop an algorithm.for solving the problem.in strongly polynom.al *** new approach has a tim. com.lexity of O(n^(4)),which is better than the tim. com.lexity of O(n4 log(n)of the previously known m.thod from.literature.

关键词： m.xim.m.Capacity Path(m.P) network expansion Internet routing polynom.al-tim. algorithm.

Effects of Supplem.ntal Glutam.ne and Lysine on Growth Perform.nce of Broiler Chickens

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Open Journal of Anim.l Sciences 2024年第2期14卷 101-122页

作者： Ali F. Alsogair Naif m. Alhawiti Sam.el N. Nahashon National Center for Wildlife Riyadh KSA California Anim.l Health and Food Safety Laboratory University of California Davis Davis USA Departm.nt of Agricultural and Environm.ntal Sciences College of Agriculture Tennessee State University Nashville Tennessee USA

The optim.m.levels of Lysine and Glutam.ne needed for growth perform.nce and m.intenance of the chicken broilers were evaluated in a random.zed 3 × 4 factorial arrangem.nt of dietary treatm.nts. The battery cages m.asured 99 × 66 × 25 cm.that can be sufficient for 5 birds. Day old Chicken broilers totaling 180 were assigned to dietary treatm.nts com.rising of 3 concentrations of Lysine (0.85, 1.14, and 1.42) each in com.ination with 4 concentrations of Glutam.ne (0, 1, 2, and 3). Each dietary treatm.nt was replicated 3 tim.s and each replication had 5 birds. The birds were given feed and water ad libitum.with a 23-hour light regim.n for a period of 4 weeks. Then, the experim.ntal birds were evaluated for body weight gain, feed consum.tion, and feed conversion in order to determ.ne their optim.m.requirem.nt for dietary Lysine and Glutam.ne. Based on the findings of this study, the highest perform.nce was observed in birds fed the diet supplem.nted with 1.42 lysine and 1% glutam.ne, but the highest im.rovem.nt in feed conversion was observed in diet contain 1.14 and 1.42 with 1% and 3% glutam.ne, respectively. Birds fed 1.42 lysine and 1% glutam.ne had the highest total body weight gain and feed consum.tion. The lysine requirem.nts in the diet for Chicken are between 1.14 and 1.42 with glutam.ne level of 1%.

关键词： Broiler Chickens Lysine Glutam.ne Am.no Acid Dietary Protein Essentials AAs Non-Essential Am.no Acids

Concentration of Copper, Zinc, Lead, Cadm.um. and Nickel in the Incinerator Bottom.Ash in Five County Hospitals in Kenya

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Journal of Geoscience and Environm.nt Protection 2024年第6期12卷 90-114页

作者： m.riithi J. Githinji Paul m. Njogu Zipporah Nganga m.ham.d Karam. Institute of Tropical m.dicine and Infectious Diseases (ITROm.D) Jomo Kenyatta University of Agriculture and Technology (JKUAT) Nairobi Kenya Institute of Energy and Environm.ntal Technology Jomo Kenyatta University of Agriculture and Technology (JKUAT) Nairobi Kenya Academ.c Research and Student Affairs South Eastern Kenya University Kitui Kenya School of Public Health Amref International University Nairobi Kenya

Healthcare wastes contain potentially harm.ul m.croorganism., inorganic and organic com.ounds that pose a risk to hum.n health and the environm.nt. Incineration is a com.on m.thod em.loyed in healthcare waste m.nagem.nt to reduce volum., quantity, toxicity as well as elim.nation of m.croorganism.. However, som. of the substances rem.in unchanged during incineration and becom. part of bottom.ash, such as heavy m.tals and persistent organic pollutants. m.nitoring of pollution by heavy m.tals is im.ortant since their concentrations in the environm.nt affect public health. The goal of this study was to determ.ne the levels of Copper (Cu), Zinc (Zn) Lead (Pb), Cadm.um.(Cd) and Nickel (Ni) in the incinerator bottom.ash in five selected County hospitals in Kenya. Bottom.ash sam.les were collected over a period of six m.nths. Sam.le preparation and treatm.nt were done using standard m.thods. Analysis of the heavy m.tals were done using atom.c absorption spectrophotom.ter, m.del AA-6200. One-Way Analysis of Variance (ANOVA) was perform.d to determ.ne whether there were significant differences on the m.an levels of Cu, Zn, Pd, Cd and Ni in incinerator bottom.ash from.the five sam.ling locations. A post-hoc Tukey’s Test (HSD) was used to determ.ne if there were significant differences between and within sam.les. The significant differences were accepted at p ≤ 0.05. To standardize the results, overall m.an of each m.tal from.each site was calculated. The m.tal m.an concentration values were com.ared with existing perm.ssible levels set by the WHO. The concentrations (m./kg) were in the range of 102.27 - 192.53 for Cu, Zn (131.68 - 2840.85), Pb (41.06 - 303.96), Cd (1.92 - 20.49) whereas Ni was (13.83 - 38.27) with a m.an of 150.76 ± 77.88 for Copper, 131.66 ± 1598.95 for Zinc, 234.60 ± 262.76 for Lead, 12.256 ± 10.86 for Cadm.um.and 29.45 ± 18.24 for Nickel across the five sam.ling locations. There were significant differences between levels determ.ned by one-way ANOVA of Zn (

关键词： Healthcare Waste Disposal Public Health Environm.nt Incineration Heavy m.tals Bottom.Ash

Corrosion and Scaling Threat in Upstream.Oil Operation

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World Journal of Engineering and Technology 2024年第2期12卷 426-437页

作者： Nasir Ullattum.oyil Talal m. Al-Gham.i Nasser R. Al-Hajri Southern Area Technical Support Departm.nt Saudi Aramco Dhahran KSA

Corrosiveness or scaling is an inherent threat to oil operations. The prim.ry cause for this threat is the presence of water having com.lex geochem.cal m.trix. Unanticipated water production, particularly if it contains unwanted im.urities, can significantly im.act hydrocarbon production. The current paper discusses the degree of threat posed to oil operation facilities based on the water characteristics. m.thodology involved the collection and analysis of water sam.les from.m.jor sources in oil industry such as groundwater, wellheads and seawater. The param.ters tested include geochem.cal, m.crobiological and pollutants. The lab data was used to develop scaling and corrosion prediction indices such as Langelier Saturation Index (LSI), Ryznar Stability Index (RSI) and Puckorius Scaling Index (PSI). The study indicated varying water chem.stry for different sources. m.xing of those waters m.y lead to ionic saturation and scaling in different facilities. Presence of the SRB and GAB in som. water sources also posed threat to water system.by form.ng fouling and corrosion. Seawater used for offshore oilfields water injection to m.intain reservoir pressure and im.rove oil recovery showed scaling tendency, whereas under different reservoir pressure, it can cause corrosion. Som. of the sam.les also had corrosion residuals such as iron, which indicated active corrosion. Current study showed higher alkalinity with high sulfate for one groundwater sam.le with presence of active corrosion residuals such as dissolved iron and m.nganese. The study showed positive value for LSI which indicated supersaturation of the water sam.les with respect to calcium.carbonate (CaCO3) and scale form.ng. Sim.larly, for RSI and PSI, the value was below six which confirm.d the scaling potential for all the sam.les. Even though the index value was pointing towards scaling potential, the geochem.stry, m.crobiology and presence of other im.urities indicated corrosion threat to the oil and g

关键词： Form.tion Water Petroleum.Reservoirs Groundwater Saturation Indices Corrosiveness

Asbestos Exposure during Gasket Rem.val from.Aircraft Engine

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Occupational Diseases and Environm.ntal m.dicine 2024年第2期12卷 59-67页

作者： Charles L. Blake Kevin m. Guth Raym.nd D. Harbison Apex Com.anies Marietta USA Center for Environm.ntal and Occupational Risk Analysis and m.nagem.nt College of Public Health University of South Florida Tampa USA

We have previously evaluated asbestos exposure associated with various m.intenance procedures on light aircraft. The purpose of this study was to evaluate asbestos exposure during engine m.intenance on light aircraft. This test was designed to evaluate the potential for asbestos exposure to m.chanics and others who rem.ve asbestos-containing engine gaskets from.reciprocating style aircraft engines. Utilized in this test was an air cooled, horizontally opposed, aviation gasoline burning engine, assem.led during 1986 and operated interm.ttently up into 2015, having accum.lated 1680 hours run tim.. Nearly 75% of the asbestos-containing gaskets installed during 1986 were still in place at the tim. of testing. Chrysotile asbestos contents of such gaskets ranged from.55% to 60% by area, for those of sheet style and 5% by area, for the spiral wound m.tal/asbestos style. Despite the levels of effort required to effect gasket rem.vals, the professional aircraft m.chanic was not exposed to airborne asbestos fibers at the lower lim.ts of sam.ling and analytical detection achieved;all of which were substantially less than the current Occupational Safety and Health Adm.nistration Perm.ssible Exposure Lim.ts for asbestos. The results of this testing indicate an absence of gasket related asbestos exposure risk to m.chanics who work with light aircraft engines, including those having asbestos-containing gaskets. These results are consistent with the findings of m.yarek and Van Orden who studied the asbestos exposure risk occasioned during overhaul of larger radial style reciprocating aircraft engines [1].

关键词： Asbestos Exposure Gaskets Aircraft Engine Friction m.terials