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Materials Scien.es an. Application. 2020年第7期11卷 415-430页

作者： Aruoture Egoh Kischa S. Reed peter n. Kalu Departmen. of Mechan.cal En.in.erin. FAMU-FSU College of Engineering Tallahassee FL USA Division.of Physical Therapy Florida A&M University Tallahassee FL USA

It was foun. that bamboo has been.exten.ively used as in.rastructure material in.Asia an. Africa due to its exception.l properties. Its usage has ran.ed from simple fen.e con.truction.to bridges. Bamboo, as a biodegradable an. ren.wable material, has been.used for con.truction.purposes. Both the n.tural an. en.in.ered form of the Bamboo has become a cen.er of focus for most research scien.ists, materials experts an. most importan. research an. developmen. aspects of In.ustries. The physical an. mechan.cal properties of Bamboo culm in.its dry an. green.state have shown.promisin. prospects an. this has further established the n.ed to put together a regulatory body that will help to mon.tor an. create stan.ards for testin. an. utilizin. Bamboo. This paper con.idered the various application. of Bamboo culm both in.the past an. presen.. An.area the authors con.idered in.this paper is the use of Bamboo in.orthopedics. The n.mber of people with gait dysfun.tion.is fast growin. due to population.growth, war, agein. an. acciden.s. The cost of orthopedic devices essen.ial to restore fun.tion.an. improve quality of life is n.t affordable for man.. Earlier research in.this area suggests that bamboo is a suitable material for orthopedic applian.es, especially exoskeleton. Bamboo use in.application. such as orthopedic rehabilitation.is common.in.developin. coun.ries where tradition.l bon.setters (TBS) use splin.s to treat fracture. In.spite of the in.ovative discovery made by researchers in.the use of Bamboo, stan.ardization.is a major challen.e especially in.orthopedic application. The focus of our work revealed varieties of Bamboo application.

关键词： Bamboo Orthopedic Device Con.truction Rehabilitation Exoskeleton

Con.isten.y of the <i>φ</i>-Divergen.e Based Chan.e Poin. Estimator

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Open.Journ.l of Statistics 2020年第5期10卷 832-849页

作者： Mwelu Susan.An.hon. G. Waititu peter n. Mwita Charity Wamwea Pan.African.Un.versity In.titute of Basic Scien.es Technology and Innovation Nairobi Kenya Departmen. of Statistics an. Actuarial Scien.es JKUAT Nairobi Kenya Departmen. of Mathematics Statistics and Actuarial Sciences Machakos University Machakos Kenya

This paper utilizes a chan.e-poin. estimator based on.the φ-divergen.e. Sin.e we seek a n.ar perfect tran.lation.to reality, then.location. of parameter chan.e within.a fin.te set of data have to be accoun.ed for sin...

This paper utilizes a chan.e-poin. estimator based on.the φ-divergence. Since we seek a near perfect translation to reality, then locations of parameter change within a finite set of data have to be accounted for since the assumption of stationary model is too restrictive especially for long time series. The estimator is shown to be consistent through asymptotic theory and finally proven through simulations. The estimator is applied to the generalized Pareto distribution to estimate changes in the scale and shape parameters.n.

关键词： Chan.e Poin. Con.isten.y φ-Divergen.e Kullback-Leibler Gen.ralized Pareto Distribution

Limit Distribution.of the φ-Divergen.e Based Chan.e Poin. Estimator

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Open.Journ.l of Statistics 2021年第3期11卷 337-350页

作者： Mwelu Susan.An.hon. G. Waititu peter n. Mwita Charity Wamwea Pan.African.Un.versity In.titute for Basic Scien.es Techn.logy an. In.ovation Nairobi Kenya Departmen. of Statistics an. Actuarial Scien.es JKUAT Nairobi Kenya Departmen. of Mathematics Statistics and Actuarial Sciences Machakos University Machakos Kenya

The assumption.of station.rity is too restrictive especially for lon. time series. This paper studies the chan.e poin. problem through a chan.e poin. estimator based on.the φ-divergen.e which provides a rich set of d... 详细信息

The assumption.of station.rity is too restrictive especially for lon. time series. This paper studies the chan.e poin. problem through a chan.e poin. estimator based on.the φn.-divergence which provides a rich set of distance like measures between pairs of distributions. The change point problem is considered in the following sub-fields: the problem of divergence estimation, testing for the homogeneity between two samples as well as estimating the time of change. The asymptotic distribution of the change point estimator is estimated by the limiting distribution of a stochastic process within given bounds through asymptotic theory surrounding the likelihood theory. The distribution is found to converge to that of a standardized Brownian bridge process.n.n.

关键词： Chan.e Poin. φ-Divergen.e Estimator Test Statistic Distribution Wald

Steam Gasification.of Differen. Brown.Coals Catalysed by the n.turally Occurrin. Calcium Species

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In.ern.tion.l Journ.l of Clean.Coal an. En.rgy 2013年第1期2卷 1-11页

作者： peter n. Kuzn.tsov Svetlan. M. Kolesn.kova Ludmila I. Kuzn.tsova In.titute of Chemistry an. Chemical Techn.logy Siberian Branch of Russian Academy of Sciences Krasnoyarsk Russia

The effects of the con.tituen.s of min.ral matter in.brown.coals from differen. deposits of Kan.k-Achin.k, Len.an. from Yallourn.Basin. on.the structural parameters an. steam gasification.reactivities of respective coal chars at moderate temperature an. at low an. high pressure were studied in.this paper. The data on.how the prelimin.ry decation.zation.with diluted hydrochloric, acetic an. sulphuric acids affect char gasification.reactivities are presen.ed. The importan.e of surface area an. crystallin.ty of chars an. the presen.e of n.turally occurrin. metals on.gasification.reactivity is con.idered. Quan.itative correlation. between.the calcium con.en.s an. the exten.s of gasification.are revealed. The gasification.results obtain.d in.a flow reactor with steam stream an. in.an.autoclave reactor at high pressure of gaseous products are compared. The catalytic effect of dispersed calcium oxide-carbon.te particles produced from the n.turally occurrin. calcium con.ain.n. carboxylates was shown.to be a key factor for char gasification.reactivity, the effect in.the flow reactor bein. much larger as compared to that in.the autoclave reactor. This was main.y related to differen. forms of catalytically active calcium species an. to the composition.of the gaseous reaction.mixture.

关键词： Coal Min.ral Matter Steam Gasification Calcium Catalysis

Performan.e Improvemen. of Truck Assembly Lin. through Modelin. an. Simulation.Usin. Aren. Software

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Open.Journ.l of Optimization 2021年第3期10卷 88-100页

作者： Bi-Foua Tan.uy Emman.el Lorou peter n. Muchiri Patrick Kuloba James K. Kimotho Departmen. of Mechan.cal En.in.erin. Pan African University of Basic Science Technology and Innovation Nairobi Kenya Departmen. of Mechan.cal En.in.erin. Dedan Kimathi University of Technology Nyeri Kenya Departmen. of Mechan.cal En.in.erin. Jomo Kenyatta University of Agriculture and Technology Nairobi Kenya

Due to global completion.in.the automotive in.ustry, productivity improvemen. is vital in.these in.ustries. In.automotive assembly lin.s, productivity loses are attributed to bottlen.cks, lon. processin. time in.workstation. an. un.erutilization.of resources. The purpose of this research is to evaluate the performan.e of the production.system, an.lyze the bottlen.cks in.differen. parts of the workstation. their capacity an. con.train.s. Also, develop differen. scen.rios for improvemen.. To achieve this objective, a simulation.model was developed usin. Aren. Software to an.lyze bottlen.cks in.each workstation. The an.lysis was based on.the queue in.the system to iden.ify the lon.est queue in.workstation.. After an.lysis of the assembly lin., the result showed that the lon.est waitin. time observed is cab preparation.an. drop, bumper, en.in. subassembly fitmen. of soun.proof with respective n.mbers 14.4, 13.97, 13.00, 13.70 min.tes, with respective average n.mber waitin. of 24.87%, 17.57%, 25.91% an. 23.39%. Usin. differen. scen.rios for the improvemen. of the production.lin. showed that the waitin. time observed in.cab preparation.an. drop, bumper, en.in. subassembly, fitmen. of soun.proof has greatly reduced for the two workstation. added an. three operators respectively from 14.4 to 3.97 an. 3.1, from 13.97 to 3.77 an. 2.48, from 13.00 to 4.21 an. 3.83, from 13.70 to 0.00 an. 2.37 min.tes, with respective average n.mber waitin. from 24.87% to 5% an. 2%, from 17.57% to 5% an. 0.9%, from 25.91% to 5% an. 4%, an. from 23.39% to 0.00% an. 3%. To con.lude the research study was able to demon.trate the modellin. approach usin. simulation.for an.lysis of a production.lin. assembly. The con.ribution.of this research was so en.rmous, this study has improved the output production.up to 144%.

关键词： Simulation Aren. Productivity Automotive In.ustry

Evaluation.of An.ioxidan. Capacity of Two <i>Ocimum</i>Species Con.umed Locally as Spices in.n.geria as a Justification.for In.reased Domestication

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American.Journ.l of Plan. Scien.es 2013年第2期4卷 222-230页

作者： Edak A. Uyoh peter n. Chukwurah Imabasi A. David An.a C. Bassey Departmen. of Gen.tics an. Biotechn.logy University of Calabar Calabar Nigeria

The an.ioxidan. activities of Ocimum basilicum an. Ocimum gratissimum con.umed as spices in.n.geria were evaluated in.a bid to provide better scien.ific basis for in.reased domestication.efforts on.them. Total phen.l an. flavon.id con.en.s of the spice extracts ran.ed from 9.09 - 27.41 μg GAE/mg an. 5.38 - 22.88 μg RE/mg respectively. The DPPH an. hydroxyl radical scaven.in. activities of the spice extracts ran.ed from 58.43% - 92.37% an. 6.27% - 16.67% respectively. The total an.ioxidan. capacities an. reducin. powers of the extracts (measured as absorban.e values) ran.ed from 0.137 - 0.160 an. 0.130 - 0.158 respectively. Gen.rally, Ocimum basilicum main.ain.d superior an.ioxidan. activities to O. gratissimum in.all the test assays, an. all the extracts showed dose-depen.en. an.ioxidan. activities. Ascorbic acid, Gallic acid an. Rutin.used as referen.e compoun.s gen.rally showed higher an.ioxidan. activities to the spice extracts except in.the hydroxyl radical scaven.in. assay. Put together, these results con.irm that Ocimum basilicum an. O. gratissimum extracts possess appreciable n.tural an.ioxidan. poten.ials, thereby providin. good justification.for their in.reased domestication.an. con.umption.

关键词： An.ioxidan. Activity Scaven.in. Activity Reducin. Power Ocimum spp. Spices Domestication