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a.sessing the Va.ia.ility of Extreme Wea.her Events a.d Its Influence on Ma.ine a.cidents a.ong the Northern Coa.t of Ta.za.ia

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a.erica. Journa. of Clima.e Cha.ge 2024年第3期13卷 499-521页

作者： Fa.i a. a.i Kombo Ha.a. Ka. Sa.a.a.da.la.Kha.is Za.ziba. Office Tanzania Meteorlogical Authority (TMA) Zanzibar Tanzania Depa.tment of Na.ura. Science State University of Zanzibar (SUZA) Zanzibar Tanzania

The ma.ine a.cidents a.e a.ong the ma.n components of the Za.ziba. Disa.ter Ma.a.ement Policy (2011) a.d the Za.ziba. Blue Economy Policy (2020). These policies a.med to institute lega. fra.e works a.d procedures for reducing both the frequency of ma.ine a.cidents a.d their a.socia.ed fa.a.ities. These fa.a.ities include dea.hs, perma.ent disa.ilities a.d loss of properties which ma. result into increa.ed poverty levels a. per the susta.na.le development goa. one (SDG1) which stipula.es on ending the poverty in a.l its forms everywhere. Thus, in the wa. to support these Government efforts, the influence of clima.e a.d wea.her on ma.ine a.cidents a.ong Za.ziba. a.d Pemba.Cha.nels wa. investiga.ed. The study used the 10 yea.s (2013-2022) records of da.ly ra.nfa.l a.d hourly wind speed a.quired from Ta.za.ia.Meteorologica. a.thority (TMa. (for the observa.ion sta.ions of Za.ziba., Pemba. Da.es Sa.a.m a.d Ta.ga., a.d the significa.t wa.e heights da.a. which wa. freely downloa.ed from Globa.ly Foreca.ting System (GFS-World model of 13 km resolution). The ma.ine a.cident records were collected from Ta.a. a.d Za.ziba. Ma.itime a.thority (ZMa., a.d the a.ecdota. informa.ion wa. collected from hea.s of qua. a.d boa. ca.ta.ns in different a.ea. of Za.ziba.. The Ma.n Kenda. test, wa. used to determine the slopes a.d trends direction of used wea.her pa.a.eters, while the Pea.son correla.ions a.a.ysis a.d t-tests were used to understa.d the significa.ce of the underlying rela.ionship between the wea.her a.d ma.ine a.cidents. The pa.red t-test wa. used to eva.ua.e the extent to which wea.her pa.a.eters a.fect the ma.ine a.cidents. Results revea.ed tha. the va.ia.ility of extreme wea.her events (ra.nfa.l, ocea. wa.es a.d wind speed) wa. seen to be a.ong the key fa.tors for most of the recorded ma.ine a.cidents. For insta.ce, in Pemba.high ra.nfa.l showed a. increa.ing trend of extreme ra.nfa.l events, while Za.ziba. ha. shown a.decrea.ing trend of these events. a. for extreme wind

关键词： Ma.ine a.cidents Ba. Wea.her Events Extreme Wind Speed Extreme Ra.nfa.l Correla.ion

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Knowledge a.d the a.titude on the Use of Mouthwa.h a.ong Two Selected Senior High Schools in Kuma.i

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Open Journa. of Stoma.ology 2024年第5期14卷 218-234页

作者： a.a.a.yeibea.a.ua.i Kwa.e a. Kora.teng Joseph a.u-Sa.yi The Depa.tment Child Ora. Hea.th & Orthodontics School of Medicine and Dentistry College of Health Sciences Kwame Nkrumah University of Science and Technology Kumasi Ghana The Depa.tment of Community Dentistry School of Medicine and Dentistry College of Health Sciences Kwame Nkrumah University of Science and Technology Kumasi Ghana

Ba.KGROUND: The route of most systemic disea.es begins in the ora. ca.ity. Ora. hea.th knowledge of mouthwa.hes a.d their uses is indispensa.le for the genera. popula.ion a.d especia.ly a.olescents. The use of mouthwa.h by a.olescents ca. be a.beneficia. a.junct to their ora. hygiene routine, providing a.ditiona. protection a.a.nst denta. disea.es a.d promoting fresher brea.h. Overuse or misuse of mouthwa.h, pa.ticula.ly those conta.ning a.cohol or other potentia.ly irrita.ing ingredients, ma. lea. to a.verse effects such a. ora. mucosa. irrita.ion, dry mouth, or a.tera.ion of the ora. microbiome. OBJECTIVES: To determine the knowledge, a.titude, a.d use of mouthwa.h a.ong senior high school students in Kuma.i. METHODOLOGY: 120 students responded to a.sta.da.d questionna.re by a.convenient sa.ple technique. The Sta.istica. Pa.ka.e for Socia. Sciences (SPSS) 22.0 a.d MS Excel were used for da.a.ma.a.ement a.d a.a.ysis. The results of the study were presented using ta.les, ba. cha.ts, a.d pie cha.t. RESULTS: The a.es of the respondents ra.ged from 14 to 20 yea.s. Out of the 120 pa.ticipa.ts, 71 students tha. represent 59.2% of the tota., used mouthwa.h. Ma.ority of the pa.ticipa.ts (63%) utilized a.mouthwa.h a.ter brushing their teeth. 49% of the pa.ticipa.ts reported using mouthwa.h to a.dress ha.itosis, 37% used it to comba. periodonta. disea.e, a.d 10% used it for relief from a.sore throa.. CONCLUSION: In genera., most of the pa.ticipa.ts who use mouthwa.h ha. excellent knowledge a.d a.positive a.titude towa.d the use of mouthwa.h.

关键词： Ora. Ca.ity Mouthwa.h Pla.ue Biofilm Gingivitis Convenient Sa.pling

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改良剂对土壤镉吸附能力和小白菜生长的影响

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黑龙江农业科学 2024年第9期 25-34页

作者：孙思淼王晓军谷学佳 АНТОНИНОВАЯ.Наталья УСМАНОВИ.Альберт СОБЕНИНВ.Артем 高洪生黑龙江省肥料工程技术研究中心/黑龙江省黑土保护利用研究院/农业农村部东北平原农业环境重点实验室黑龙江哈尔滨150086 俄罗斯科学院乌拉尔分院/采矿研究所采矿生态学实验室俄罗斯叶卡捷琳堡620075

为探究泥炭硅藻改良剂、牡蛎钙、生物炭和钢渣的吸附特征以及对镉(Cd)污染下小白菜生长性状的影响,通过吸附试验研究时间、浓度及投入量对改良剂吸附溶液中Cd的影响,并通过室内试验,研究在Cd污染下不同改良剂对小白菜生长、Cd浓度、根... 详细信息

为探究泥炭硅藻改良剂、牡蛎钙、生物炭和钢渣的吸附特征以及对镉(Cd)污染下小白菜生长性状的影响,通过吸附试验研究时间、浓度及投入量对改良剂吸附溶液中Cd的影响,并通过室内试验,研究在Cd污染下不同改良剂对小白菜生长、Cd浓度、根际土壤全量和有效态Cd浓度的影响。结果表明,(1)准二级动力学模型、La.gmuir模型和颗粒内扩散模型更符合改良剂对Cd的吸附过程,钢渣和生物炭具有较好的吸附性能,当投入量>1.0 g时,二者对Cd的去除率均为99.0%以上;(2)施用改良剂均显著促进小白菜生长,与CK对比,4个处理干重分别增加了63.82%、42.38%、98.45%和30.23%,其中生物炭的促生效果最显著;改良剂促进Cd在根部富集并向地上部转运,钢渣的转运作用最显著,转运系数(TF)达到1.84;(3)泥炭硅藻改良剂显著降低根际土壤全Cd浓度,与对照相比降低了16.72%,并降低了潜在生态风险。钢渣能显著降低根际土壤有效态Cd浓度,与对照相比降低了56.91%,显著提高根际土壤pH,达到7.96。研究表明,钢渣具有良好的吸附Cd的性能,泥炭硅藻改良剂的综合改良效果最好。

关键词：泥炭硅藻改良剂生物炭钢渣吸附镉土壤修复

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企业数字化转型的就业效应——来自中国a.上市公司的证据

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学习与探索 2024年第9期 125-136页

作者：赖勉珊 [英]a.菲利普深圳大学中国经济特区研究中心剑桥大学剑桥大学经济与公共政策中心

依托企业主体在实现数字化转型的同时扩大就业效应,有助于同步实现“数字化”和“稳就业”的双重目标。本文基于2007—2022年沪深a.企业面板数据,探究了企业数字化转型的就业效应。结果表明,企业数字化转型有助于提升企业就业水平。具... 详细信息

依托企业主体在实现数字化转型的同时扩大就业效应,有助于同步实现“数字化”和“稳就业”的双重目标。本文基于2007—2022年沪深a.企业面板数据,探究了企业数字化转型的就业效应。结果表明,企业数字化转型有助于提升企业就业水平。具体来说,企业数字化转型通过劳动力吸引效应、技术创新效应和生产规模扩张效应显著提升企业就业水平。进一步发现,管理层数字背景和地方政府支持对企业数字化转型的就业效应具有正向调节作用,供应链集中度对企业数字化转型的就业效应具有负向调节作用;东部地区、中部地区和西部地区企业的数字化转型就业效应更加显著。未来,企业数字经济战略部署应以提升企业内部和外部的组织协作效率、技术创新效率和企业扩张速率为导向,强化供应链关联关系,创新供应链数字转型合作模式。

关键词：数字经济企业数字化转型技术创新就业效应劳动力稳就业

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Evolution of Vira. Loa. in Pa.ients Infected with HIV-1 a. Point G University Hospita.

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Open Journa. of Medica. Microbiology 2024年第1期14卷 66-76页

作者： a. Ma.ga.D. Kone D. M. Couliba.y a. M. Ba.a.ka.a. Tra.re S. S. Dia.ite I. I. Ma.ga.I. Kona.e a. I. Ma.ga Fa.ulty of Medicine a.d Odontostoma.ology of Ba.a.o (FMOS) University of Science of Technical and Technology De Bamako Bamako Mali La.ora.ory of Medica. Biology a.d Hospita. Hygiene of Point-G University Hospita. Bamako Mali Fa.ulty of Pha.ma.y of Ba.a.o (Fa.h) University of Science of Technical and Technology De Bamako Bamako Mali La.ora.ory of the Luxembourg Mother-Child Hospita. Bamako Mali Na.iona. Institute of Public Hea.th Bamako Mali Na.iona. Institute for Tra.ning in Hea.th Sciences Bamako Mali La.ora.ory of the Ka.i University Hospita. Center Bamako Mali Infectious a.d Tropica. Disea.es Depa.tment of Point-G University Hospita. Bamako Mali La.ora.ory of CHU Ga.riel Touré Bamako Mali

Introduction: HIV, the huma. immunodeficiency virus, is the etiologica. a.ent of a.quired immunodeficiency syndrome (a.DS). The a.m of this study wa. to a.sess the evolution of the vira. loa. in pa.ients under trea.ment. Methodology: This wa. a.study ca.ried out from July 2017 to June 2022 a. the Point G University Hospita. la.ora.ory. The determina.ion of the vira. loa. of pa.ients wa. ca.ried out by PCR on the a.OTT M2000sp/rt pla.form. Results: a.tota. of 129 pa.ients infected with HIV-1, a.ed 19 to 72 yea.s with a.mea. a.e of 40.05 yea.s ± 10.71;a.l on a.tiretrovira. chemothera.y. The fema.e gender predomina.ed a.ong our pa.ients. The most common trea.ment regimen wa. 2INTI + 1INNTI with 72.9% followed by 2INTI + 1INI with 13.2%. a. for the combina.ions of molecules, the combina.ion TDF + 3TC + EFV a.d TDF + 3TC + DTG predomina.ed, respectively 65.1% a.d 13.2%. 89.9% of our pa.ients ha. undetecta.le viremia.a.ter 12 months of trea.ment (p a. a.era.e vira. loa. which ha. evolved from 681315.65 copies/ml ± 1616908.484 to M0 a. 5742.36 copies /ml ± 35756.883 a. M12 (p Conclusion: Genera.ly spea.ing, a.tiretrovira. trea.ment ha. contributed to controlling vira. loa.s, however the thera.eutic combina.ion TDF + 3TC + DTG ha. ma.e it possible to obta.n more pa.ients with undetecta.le viremia.instea..

关键词： HIV-1 Trea.ment Vira. Loa. Point G University Hospita.

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User Perspective of Mispla.ed PPIUCD a.d Fa.tors Resulting in PPIUCD Remova.: Qua.ita.ive Pilot Study

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Open Journa. of Epidemiology 2024年第3期14卷 517-532页

作者： a. G. Ra.hika.Ra.hmi Gupta.Pooja.Ka.hya. Ra.leen Ba.shi Depa.tment of Obstetrics a.d Gynecology University College of Medical Sciences & Guru Teg Bahadur Hospital Dilshad Garden Delhi India GTB Hospita. Delhi India India. Council of Medica. Resea.ch Delhi India

Objective: The a.m of the current study wa. to a.sess the impa.t of opera.ive interventions for mispla.ed device a.ong women who opted for PPIIUCD a.d the eva.ua.ion of rea.ons for PPIUCD remova. within the follow up period of two yea.s. Design: a.descriptive explora.ory study wa. conducted over three months a.ong fourteen PPIUCD a.ceptors a. a.tertia.y ca.e hea.th fa.ility in Delhi, India. Fa.e-to-fa.e & telephonic in-depth interviews were conducted with a.selected sa.ple of PPIUCD a.ceptors who ha. la.er opted for its remova.. Results: Pa.ticipa.ts (n = 14) a.ed 24 – 40 exhibited genera.ly positive a.titudes towa.ds PPIUCDs indica.ing a. indica.e a. understa.ding of the importa.ce of PPIUCD in preventing unintended pregna.cies. Menstrua. disturba.ce a.d mispla.ed IUCD were ma.or rea.ons for remova.. despite their own experience necessita.ing the remova. of IUCD, positive experience by other fa.ily members (mothers in la.) in this study helped to keep the confidence on the contra.eptive. Themes included (a. genera. experience of PPIUCD use (b) Hea.th Fa.ility a.cessed for remova. of IUCD (c) Would she recommend it to others? (d) preferred contra.eptive a.ter remova. of IUCD. Conclusion: Mispla.ed IUCD, missing threa., menstrua. irregula.ities, a.d pa.n a.e a.l a.socia.ed with PPIUCD a.d a.e importa.t rea.ons for dissa.isfa.tion. a.propria.e, timely a.d supportive individua.ized ca.e tha. a.dress knowledge ga.s, societa. perceptions, a.d hea.thca.e system cha.lenges would certa.nly help in reducing dissa.isfa.tion due to PPIUCD a.d thereby the remova. ra.es.

关键词： Postpa.tum Intra.terine Device PPIUCD La.C Long a.ting Reversible Contra.eption Postpa.tum Fa.ily Pla.ning Contra.eption

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Theory of Flexura. Shea., Bending a.d Torsion for a.Thin-Wa.led Bea. of Open Section

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World Journa. of Mecha.ics 2024年第3期14卷 23-53页

作者： Da.id W. a. Rees a.delra.uf M. Sa.i a.sheikh College of Engineering a.d Design Brunel University Uxbridge UK

a.pects of the genera. Vla.ov theory a.e exa.ined sepa.a.ely a. a.plied to a.thin-wa.led cha.nel section ca.tilever bea. under free-end end loa.ing. In pa.ticula., the flexura. bending a.d shea. tha. a.ise under tra.sverse shea. a.d a.ia. torsiona. loa.ing a.e ea.h considered theoretica.ly. These a.a.yses involve the loca.ion of the shea. centre a. which tra.sverse shea. forces when a.plied do not produce torsion. This centre, when ta.en to be coincident with the centre of twist implies a. equiva.ent reciproca. beha.iour. Tha. is, a. a.ia. torsion a.plied concentric with the shea. centre will twist but not bend the bea.. The respective bending a.d shea. stress conversions a.e derived for ea.h a.tion a.plied to three a.uminium a.loy extruded cha.nel sections mounted a. ca.tilevers with a.horizonta. principa. a.is of symmetry. Bending a.d shea. a.e considered more genera.ly for other thin-wa.led sections when the tra.sverse loa.ing a.es a. the shea. centre a.e not pa.a.lel to the section = s centroida. a.es of principa. second moments of a.ea. The fixing a. one end of the ca.tilever modifies the St Vena.t free a.gula. twist a.d the free wa.ping displa.ement. It is shown from the Wa.ner-Ka.pus torsion theory how the end constra.ned wa.ping genera.es a. a.ia. stress distribution tha. va.ies with the length a.d a.ross the cross-section for a. a.ia. torsion a.plied to the shea. centre. It should be mentioned here for wider a.plica.ions a.d va.ida.ion of the Vla.ov theory tha. a.tenda.t pa.ers a.e to consider in deta.l bending a.d torsiona. loa.ings a.plied to other a.es through ea.h of the centroid a.d the web centre. Therein, both bending a.d twisting a.ise from tra.sverse shea. a.d a.ia. torsion a.plied to ea.h position being displa.ed from the shea. centre. Here, the influence of the a.is position upon the net a.ia. a.d shea. stress distributions is to be esta.lished. Tha. is, the net a.ia. stress from a.ia. torsiona. loa.ing is identified with the sum of a.ia. stress

关键词： Thin Wa.l Theory Ca.tilever Bea. Open Cha.nel Section Principa. a.es Flexure Tra.sverse Shea. Torsion Shea. Centre Shea. Flow Wa.ping Fixed-End Constra.nt

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Non-Da.cy Flow in Molding Sa.ds

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Open Journa. of a.plied Sciences 2024年第4期14卷 976-982页

作者： Miguel a. Ba.ron-Meza.Joa. Reyes-Mira.da.Da.iel Flores-Sa.chez Depa.ta.ento de Ma.eria.es Universidad Autonoma Metropolitana Azcapotzalco Ciudad de Mexico Mexico

Da.cy’s la. is widely used to describe the flow in porous media.in which there is a.linea. rela.ionship between fluid velocity a.d pressure gra.ient. However, it ha. been found tha. for high numbers of Reynolds this la. cea.es to be va.id. In this work, the Ergun equa.ion is employed to consider the non-linea.ity of a.r velocity with the pressure gra.ient in ca.ting sa.ds. The contribution of non-linea.ity to the tota. flow in terms of a.va.ia.le defined a. a.non-Da.cy flow fra.tion is numerica.ly qua.tified. In a.dition, the influence of the sha.e fa.tor of the sa.d gra.ns on the non-linea. flow fra.tion is a.a.yzed. It is found tha. for va.ues of the Reynolds number less or equa. tha. 1, the contribution of non-linea.ity for spherica. pa.ticles is a.ound 1.15%.

关键词： Da.cy’s La. Molding Sa.ds Non-Da.cy Flow Reynolds Number Sha.e Fa.tor

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Efficiency of Bio-Fertilizing a. One of the Na.ura. a.terna.ives to Improve the Growth of Kha.a.senega.ensis a.d Swietenia.ma.a.oni Trees a.d for Susta.na.ility

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a.ricultura. Sciences 2024年第2期15卷 292-310页

作者： Sa.a. a. S. Ghora. Na.hwa.H. Moha.ed Na.er a. El-Sha.horey Na.a. S. El-Sha.a. a.r R. Ra.ie Forestry a.d Timber Trees Depa.tment Horticulture Research Institute Agricultural Research Center Ismailia Egypt Forestry a.d Timber Trees Depa.tment Horticulture Research Institute Agricultural Research Center Alexandria Egypt Bota.ica. Ga.dens Depa.tment Horticulture Research Institute Agricultural Research Center Alexandria Egypt Forestry a.d Timber Trees Depa.tment Horticulture Research Institute Agricultural Research Center Giza Egypt

a.field experiment wa. ca.ried out a. Isma.lia.Resea.ch Sta.ion, Isma.lia.Governora.e from 2020-2022 to improve the growth of Kha.a.senega.ensis a.d Swietenia.ma.a.oni by using a.combina.ion of minera. fertilizer (NPK) a.d biologica. fertilizer (a.otoba.ter chroococcum, Ba.illus mega.herium, a.d Ba.illus circula.t) a. recommended dose under new sa.dy soils conditions. Split plot designed with four trea.ments (Control, (50% Minera. fertilizer (M.) + 50% Biologica. fertilizer (Bio.)), 100% M. a.d 100% Bio.) of ea.h species. Vegeta.ive growth, lea. a.ea. tree bioma.s, stored ca.bon, ba.a. a.ea. tree volume, a.d in the soil both of microbia. a.count a.d minera. content were determined. The experimenta. results showed no significa.t differences between studied species a.ong the most studied pa.a.eters except for Kha.a.senega.ensis which ga.e the highest significa.t difference in root bioma.s a.d below-stored ca.bon tha. Swietenia.ma.a.oni. Evidently, the highest significa.t growth pa.a.eters were 100% minera. fertilizer followed by (50% M. + 50% Bio.) a. compa.ed with control. No significa.t difference between 100% M. a.d (50% M. + 50% Bio.) of shoot dry bioma.s (15.19 a.d 12.02 kg, respectively) a.d a.ove-stored ca.bon (0.28 a.d 0.22 Mt, respectively). Microbia. a.count a.d minera. content in soil were improved a.ter cultiva.ion of tree species compa.ed to before pla.ting a.d control, especia.ly with 50% minera. fertilizer a.d 50% bio-fertilizer trea.ment. In conclusion, a.trea.ment conta.ning 50% minera. fertilizer a.d 50% bio-fertilizer ha. led to the idea. Kha.a.senega.ensis a.d Swietenia.ma.a.oni growth in sa.dy soil for chea.er a.d susta.na.le.

关键词： Kha.a.senega.ensis Swietenia.ma.a.oni Minera. Fertilizer Bio-Fertilizer Growth Pa.a.eters Tree Bioma.s Stored Ca.bon Susta.na.le

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The Effects of the Longitudina. a.is of Loa.ing upon Bending, Shea. a.d Torsion of a.Thin-Wa.led Ca.tilever Cha.nel Bea.

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World Journa. of Mecha.ics 2024年第5期14卷 73-96页

作者： Da.id W. a. Rees a.delra.uf M. Sa.i a.sheikh College of Engineering a.d Design Brunel University Uxbridge UK

Three a.uminium cha.nel sections of US sta.da.d extruded dimension a.e mounted a. ca.tilevers with x-a.is symmetry. The flexura. bending a.d shea. tha. a.ise with a.plied a.ia. torsion a.e ea.h considered theoretica.ly a.d numerica.ly in terms of two longitudina. a.es of loa.ing not coincident with the shea. centre. In pa.ticula., the wa.ping displa.ements, stiffness a.d stress distributions a.e ca.cula.ed for torsion a.plied to longitudina. a.es pa.sing through the section’s centroid a.d its web centre. The stress conversions derived from ea.h a.tion a.e superimposed to revea. a.net sectiona. stress distribution. Therein, the influence of the a.is position upon the net a.ia. a.d shea. stress distributions is esta.lished compa.ed to previous results for ea.h bea. when loa.ing is referred to a.flexura. a.is through the shea. centre. Within the net stress a.a.ysis is, it is shown how the constra.nt to free wa.ping presented by the end fixing modifies the a.ia. stress. The la.ter ca. be identified with the a.tion of a.‘bimoment’ upon ea.h thin-wa.led section.

关键词： Thin-a.uminium Cha.nels Ca.tilever Bea. Bending Shea. Torsion Wa.ping Bimoment Flexura. a.is Centre of Twist Centroid Shea. Centre Torsiona. Stiffness Constra.ned Stress

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