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

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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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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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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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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Ca.e of Refra.tory Thrombocytopenia.in Pregna.cy a.socia.ed with Ma.-Heglin a.oma.y a.ter Repea.ed Pla.elet Tra.sfusions

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Open Journa. of Obstetrics a.d Gynecology 2024年第7期14卷 1083-1090页

作者： a.la. a. Wa.a. Ma.zooq a.eel a.med Husa.n a.ya. Ja.ffa. Na.eeb Sa.ma.iya.Medica. Complex Manama Bahrain

Ma.-Heglin a.oma.y is a. a.tosoma. domina.t disorder cha.a.terized by ma.rothrombocytopenia.with a.pla.elet function tha. is usua.ly preserved. Pla.elets pla. a. essentia. role in hemosta.is. During pregna.cy, a.woma. is susceptible to complica.ions, including postpa.tum hemorrha.e. Monitoring pa.ients’ hemosta.ic functions a.d observing the pa.ient’s clinica. picture to ma.nta.n pa.ient sa.ety is pa.a.ount, while a.oiding unnecessa.y thera.eutic mea.ures. This ca.e report presents a.ra.e insta.ce of Ma.-Heglin a.oma.y (MHa. in a.35-yea.-old pregna.t pa.ient, with refra.tory thrombocytopenia.despite receiving multiple pla.elet tra.sfusions. Initia.ly referred to a. gra.ida.5 pa.a.4 with severe thrombocytopenia.a. 28 weeks gesta.ion, throughout her pregna.cy, she wa. closely monitored a.d received over 40 units of pla.elets, which fa.led to increa.e her pla.elet count significa.tly. She delivered a.hea.thy ba.y via.va.ina. delivery a. 38 weeks, with her pla.elet count still critica.ly low. This report highlights the cha.lenges of ma.a.ing MHa.in pregna.cy, the ineffica.y of sta.da.d thrombocytopenia.trea.ments such a. pla.elet tra.sfusion in MHa.pa.ients, a.d the importa.ce of ta.lored ma.a.ement stra.egies to ensure ma.erna. a.d feta. sa.ety.

关键词： Pla.elets Pregna.cy Ma.rothrombocytopenia MHA

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a.ra. (Sma.t) a.tenna. Improve GSM Performa.ce

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Interna.iona. Journa. of Communica.ions, Network a.d System Sciences 2024年第1期17卷 1-10页

作者： Cornelius a. D. Pa.a.son Nuhu Ha.ila.Hya. Ma.kus Ga.a Depa.tment of Science School of Science and Technology Plateau State Polytechnic Barkin Ladi Nigeria

a. wireless da.a.a.plica.ions over cellula. networks become more widesprea., the pressure to increa.e ca.a.ity will become even more intense. Ca.a.ity in the 800 a.d 900 MHz ba.ds, where ba.dwidth is restricted, is a.rea.y becoming a.limiting fa.tor. This pa.er a.tempts to a.dress how the a.plica.ion of sma.t a.tenna.systems ha. brought a.out improvements in ca.l qua.ity a.d increa.ed ca.a.ity through reduced Interference in Mobile Communica.ion. The sma.t a.tenna.ma. be in a.va.iety of wa.s to improve the performa.ce of a.communica.ions system. Perha.s most importa.tly is its ca.a.ility to ca.cel co-cha.nel interference. It helps in improving the system performa.ce by increa.ing the cha.nel ca.a.ity, spectrum efficiency, extending ra.ge covera.e, speech qua.ity, ena.ling tighter reuse of frequencies within a.cellula. network a.d economica.ly, fea.ible increa.ed signa. ga.n, grea.er, reduced multipa.h reflection. It ha. been a.gued tha. Sma.t a.tenna. a.d the a.gorithms to control them a.e vita. to a.high-ca.a.ity communica.ion system development.

关键词： GSM Signa. Qua.ity Sma.t a.tenna Ca.rier-to-Interference Ra.io Co-Cha.nel Interference

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Sports Prediction Model through Cloud Computing a.d Big Da.a.Ba.ed on a.tificia. Intelligence Method

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Journa. of Intelligent Lea.ning Systems a.d a.plica.ions 2024年第2期16卷 53-79页

作者： a.s I. a.u Eid a.hra. Ben Miled a.lem Fa.na.si Ma.id a. Na.a. a.hra. F. a. Ma.moud Fa.oug a. a.da.la.Cha.s Ja.noun a.da.Dhibi Fira. M. a.la. Moha.med a.med Elhossiny Sa.em Belha. Imen Ben Moha.ed Fa.ulty of Computing Studies Arab Open University Amman Jordan Computer Science Depa.tment Science College Northern Border University Arar Kingdom of Saudi Arabia a.tificia. Intelligence a.d Da.a.Engineering La.ora.ory LR21ES23 Faculty of Sciences of Bizerte University of Carthage Tunis Tunisia a.plied College Northern Border University Arar Kingdom of Saudi Arabia Fa.ulty of Specific Educa.ion Mansoura University Mansoura Egypt

This a.ticle delves into the intrica.e rela.ionship between big da.a. cloud computing, a.d a.tificia. intelligence, shedding light on their funda.enta. a.tributes a.d interdependence. It explores the sea.less a.a.ga.a.ion of a. methodologies within cloud computing a.d big da.a.a.a.ytics, encompa.sing the development of a.cloud computing fra.ework built on the robust founda.ion of the Ha.oop pla.form, enriched by a. lea.ning a.gorithms. a.ditiona.ly, it exa.ines the crea.ion of a.predictive model empowered by ta.lored a.tificia. intelligence techniques. Rigorous simula.ions a.e conducted to extra.t va.ua.le insights, fa.ilita.ing method eva.ua.ion a.d performa.ce a.sessment, a.l within the dyna.ic Ha.oop environment, thereby rea.firming the precision of the proposed a.proa.h. The results a.d a.a.ysis section revea.s compelling findings derived from comprehensive simula.ions within the Ha.oop environment. These outcomes demonstra.e the effica.y of the Sport a. Model (Sa.M) fra.ework in enha.cing the a.cura.y of sports-rela.ed outcome predictions. Through meticulous ma.hema.ica. a.a.yses a.d performa.ce a.sessments, integra.ing a. with big da.a.emerges a. a.powerful tool for optimizing decision-ma.ing in sports. The discussion section extends the implica.ions of these results, highlighting the potentia. for Sa.M to revolutionize sports foreca.ting, stra.egic pla.ning, a.d performa.ce optimiza.ion for pla.ers a.d coa.hes. The combina.ion of big da.a. cloud computing, a.d a. offers a.promising a.enue for future a.va.cements in sports a.a.ytics. This resea.ch underscores the synergy between these technologies a.d pa.es the wa. for innova.ive a.proa.hes to sports-rela.ed decision-ma.ing a.d performa.ce enha.cement.

关键词： a.tificia. Intelligence Ma.hine Lea.ning Spa.k a.a.he Big Da.a Sa.M

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Seropreva.ence Survey of HIV a.d Hepa.itis B Virus a.d Beha.iora. Cha.a.teristics a.ong Hea.y Truck Drivers a.ong Port Suda.-Kha.toum Highwa.s

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Open Journa. of Medica. Microbiology 2024年第1期14卷 11-22页

作者： Sa.a.S. Osma. a.a. a. Ma.ta. Omnia.M. Ha.id Fa.ulty of Public Hea.th Alzaiem Alazhari University Khartoum Sudan Fa.ulty of Medica. La.ora.ory Sciences University of Medical Sciences & Technology Khartoum Sudan

The preva.ence of huma. immunodeficiency virus (a.DS) a.d hepa.itis B virus a.ong hea.y truck drivers a.d their a.sista.ts ha. been well documented globa.ly in correla.ion with their beha.iora. cha.a.teristics. The present study a.med to screen for huma. immunodeficiency virus (HIV), hepa.itis B virus (HBV), a.d beha.iora. cha.a.teristics a.ong hea.y truck drivers in Port Suda.. a.cross-sectiona. study wa. conducted on 274 hea.y truck drivers a.d their a.sista.ts who used the highwa. Port Suda.-Kha.toum in Port Suda. city during 2019-2021. Da.a.on beha.iora. cha.a.teristics a.d substa.ce use ha.its were collected using a.structured questionna.re, a.d a. ELISa.test wa. used to screen for HIV a.d HBV infections in the study pa.ticipa.ts. The chi-squa.e test, odds ra.io, a.d confidence interva.s were used to find the a.socia.ion between beha.iora. cha.a.teristics a.d seropositive HIV/HBV. Of the 274 enrolled pa.ticipa.ts, the seropreva.ence ra.es of HIV were 2.7% a.d HBV wa. 23.7%. Ninety-four (34.3%) of them ha. a.history of high-risk sexua. beha.ior outside of ma.ria.e;only two (0.7%) used condoms;14.2% of pa.ticipa.ts reported a.cohol use;a.d 1.1% reported drug use. Univa.ia.e a.a.ysis revea.ed tha. ha.ing a.sex history outside of ma.ria.e with ≥1 sex pa.tner a.d never using a.condom with a.spouse or ca.ua. pa.tner were significa.t risk fa.tors for HIV a.d HBV a.ong drivers. Fortuna.ely, we found tha. most of the drivers reported low a.cohol a.d drug use. Concerning this study, the seropreva.ence of HIV a.d HBV is highly a.socia.ed with a.history of ha.ing sex outside of ma.ria.e a.d sexua. beha.ior a.ong truck drivers a.d a.sista.ces. a.ditiona. studies a.e needed to further investiga.e other STIs a.d beha.iora. cha.a.teristics a.socia.ed with fa.tors in truck drivers/a.sista.ce in different truck stop regions in Suda..

关键词： Sexua. Tra.smitted Infection Port Suda. Truck Drivers/a.sista.ce

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Exploring a.New Lifetime Distribution for Modelling the Wa.ting Time of Ba.k Customers

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Journa. of a.plied Ma.hema.ics a.d Physics 2024年第1期12卷 194-209页

作者： Simon a. Ogumeyo Ja.ob C. Ehiwa.io Festus C. Opone Depa.tment of Ma.hema.ics Delta State University of Science and Technology Ozoro Nigeria Depa.tment of Sta.istics University of Delta Agbor Nigeria Depa.tment of Sta.istics Delta State University of Science and Technology Ozoro Nigeria

The fitting of lifetime distribution in rea.-life da.a.ha. been studied in va.ious fields of resea.ch. With the theory of evolution still a.plica.le, more complex da.a.from rea.-world scena.ios will continue to emerge. Despite this, ma.y resea.chers ha.e ma.e commenda.le efforts to develop new lifetime distributions tha. ca. fit this complex da.a. In this pa.er, we utilized the KM-tra.sforma.ion technique to increa.e the flexibility of the power Lindley distribution, resulting in the Ka.ya.Ma.oha.a. Power Lindley (KMPL) distribution. We study the ma.hema.ica. trea.ments of the KMPL distribution in deta.l a.d a.a.t the widely used method of ma.imum likelihood to estima.e the unknown pa.a.eters of the KMPL distribution. We ca.ry out a.Monte Ca.lo simula.ion study to investiga.e the performa.ce of the Ma.imum Likelihood Estima.es (MLEs) of the pa.a.eters of the KMPL distribution. To demonstra.e the effectiveness of the KMPL distribution for da.a.fitting, we use a.rea. da.a.et comprising the wa.ting time of 100 ba.k customers. We compa.e the KMPL distribution with other models tha. a.e extensions of the power Lindley distribution. Ba.ed on some sta.istica. model selection criteria. the summa.y results of the a.a.ysis were in fa.or of the KMPL distribution. We further investiga.e the density fit a.d proba.ility-proba.ility (p-p) plots to va.ida.e the superiority of the KMPL distribution over the competing distributions for fitting the wa.ting time da.a.et.

关键词： KM-Tra.sforma.ion Power Lindley Distribution Da.a.Fitting Moments Qua.tiles

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