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Autoregressive spatial analysis and individual tree modeling as strategies for the management of Eremanthus erythropappus

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Journal of Forestry Research 2016年第3期27卷 595-603页

作者： Henrique Ferraco Scolforo jose Roberto Soares Scolforo jose marcio de mello Anto nio Carlos Ferraz Filho Diogo Francisco Rossoni Thiza Falqueto Altoe Antonio Donizette Oliveira Renato Ribeiro de Lima department of Forest Science Federal University of Lavras PO Box: 3037 Lavras MG 37200-000 Brazil department of Statistics State University of Maringa Av. Colombo 5.790 Jd. Universitario Bloco E90 Maringa PR 87020-900 Brazil department of Statistics Federal University of Lavras PO Box: 3037 Lavras MG 37200-000 Brazil

The objectives of this study were to apply statistical techniques to discriminate fertilization treatments of Eremanthus erythropappus（DC.） Mac *** autoregressive modeling, and to develop individual tree models for diameter and crown area（CA） projection to define management strategies for candeia plantations subjected to different fertilization treatments. This is an important tree species originating from the Brazilian Atlantic Rain forest and Savannah biomes, intensively used in the cosmetic industry. Nonetheless, to date, research has not addressed the management of natural stands or plantations of the species. Our experiment was located in Baependi, Minas Gerais, Brazil, and comprised of four randomized blocks and 13 treatments. The treatments consisted of 12 different regimes of fertilization plus a control. Each sample plot was composed of 50 plants plus two border plants in a planting spacing of 2.5 9 2.0 m and undergoing pruning at 5 and 6 years of age. Starting in the second year, total tree height（H） and circumference（at 1.30 m from the ground or breast height, CBH） were measured every 6 months. Starting in the fifth year CA was measured. Tree growth varied by fertilization *** were detected by using an autoregressive approach, considering that standard statistical methods were not powerful enough to detect significant *** growth groups were formed, and maximum growth was obtained for treatment 10（NPK, 8-28-16）. Management guidelines are provided based on individual tree models for different fertilization levels.

关键词： Management strategies Candeia Fertilization level Brazil Crown area

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Tribological behaviour of sintered iron based self-lubricating composites

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Friction 2017年第3期5卷 285-307页

作者： jose Daniel Biasoli de mello Cristiano BINdeR Gisele HAMMES Roberto BINdeR Aloisio Nelmo KLEIN Laboratorio de Materiais(LabMat) Universidade Federal de Santa Catarina Florianópolis 88.040-900 SC BrazilLaboratorio de Tribologia e Materiais Universidade Federal de Uberl(a)ndia Uberl(a)ndia 38.400-902 MG Brazil Laboratorio de Materiais(LabMat) Universidade Federal de Santa Catarina Florianópolis 88.040-900 SC Brazil Whirlpool Embraco Unit Joinville 89.219-900 SC Brazil

This work is a review of previous works,presenting and discussing the most important results obtained by an ongoing research program towards the development of innovative,low-cost,self-lubricating composites with a low friction coefficient and high mechanical strength and wear *** emphasis is given to uniaxial die pressing of solid lubricant particles mixed with matrix powders and to metal injection moulding associated with in situ generation of solid lubricant ***,a microstructural model/processing route (powder injection moulding followed by plasma-assisted debinding and sintering) produced a homogeneous dispersion of in situ generated solid lubricant *** nodules of graphite with diameter smaller than 20 μm were formed,constituting a nanostructured stacking of graphite foils with nanometric *** Raman analysis indicated that the graphite nodules were composed of turbostratic 2D graphite having highly misaligned graphene planes separated by large interlamellae *** interplanar distance between the graphene foils and misalignment of these foils were confirmed by transmission electron microscopy and were,probably,the origin of the outstandingly low dry friction coefficient (0.04).The effect of sintering temperature,precursor content,metallic matrix composition and surface finish is also ***,the influence of a double-pressing/double-sintering (DPDS) technique on the tribological performance of self-lubricating uniaxially die-pressed hBN + graphite-Fe-Si-C-Mo composite is also ***,the tribological behaviour of die-pressed Fe-Si-C matrix composites containing 5,7.5 and 10 wt％ solid lubricants (hBN and graphite) added during the mixing step is analysed in terms of mechanical properties and wear ***,the synergy between solid lubricant particles dispersed in a metallic matrix and fluid lubricants in a cooperative mixed lubrication regime is presented.

关键词： tribological behaviour powder metallurgy iron based self-lubricating composites turbostratic graphite

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Performance Evaluation of 800 kV Porcelain Multicone Type Insulators Under Heavy Rain

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高电压技术 2008年第12期34卷 2552-2557页

作者： Orsino Oliveira Filho Darcy R. mello jose A. Cardoso Rogerio M. de Azevedo Sylvia G. Carvalho Waldenir A. S. Cruz CEPEL Electric Power Research Center Av. Olinda s/n Adrian6polis Zip Code 26053-121 Nova Iguacu RJ Brazil FURNAS Rua Real Grandeza 219 Zip Code 22283-900 Rio de Janeiro RJ Brazil

An 800 kV electric power substation can have more than one hundred of porcelain multicone type insulators supporting busbar *** or more sections in series,having middle and end fittings,compose these *** process can cause degradation of the cement used in this type of insulator and this fact can affect its dielectric performance under heavy *** paper presents results of an investigation based on power frequency high voltage tests performed on 800 kV porcelain multicone type insulators,removed from service after having operated for more than 20 years,as well a non-used one that had been stored on site for long *** insulators were tested in different arrangements:each section at a time and the two sections assembled in series,as actually used insulator *** tests were carried out under artificial rain ranging from 1 mm/min to 5 mm/*** results have confirmed a reduction of up to 30% in the insulator power frequency flashover voltage under 5 mm/min rain conditions and gave important information to the utility about radial cracks that were observed in many insulators and about the discharge mechanisms along the insulators under rain.

关键词：叠装式瓷绝缘子性能评估大雨条件电功率

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Biomechanical Analysis of Implant Assisted-Overdentures with Variations in the Attachments Systems

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Materials Sciences and Applications 2015年第8期6卷 734-742页

作者： Eduardo Vedovatto jose Vitor Quinelli Mazaro Humberto Gennari Filho Paulo Sérgio Perri de Carvalho Caroline Cantieri de mello Cleidiel Aparecido Araujo Lemos S&atilde o Leopoldo MandicInstituteandResearch Center Campinas Brazil department of Prosthodontic and dental Materials Ara&ccedil atuba School of dentistry S&atilde o Paulo State University (UNESP) Ara&ccedil atuba Brazil department of Surgery an Integrated Clinic Ara&ccedil atuba School of dentistry S&atilde o Paulo State University (UNESP) Ara&ccedil atuba Brazil departmentof dental Materials and Prosthodontics Ara&ccedil atuba Schoolofdentistry S&atilde o Paulo StateUniversity (UNESP) Ara&ccedil atuba Brazil.

The aim of this study was to assess the stress patterns on the peri-implant zone and residual alveolar ridge in different overdenture attachment system designs by the photoelasticity method. Four attachments systems were tested: O-ring, ERA, Bar-clip, and Bar-clip/O-ring association. The prostheses were loaded with 100 N in five pre-determined points and the photoelastic model was evaluated by a circular polariscope. The anterior load, O-ring, and ERA showed better stress distribution in relation to the bars systems, which presented stress levels surrounding implants. The molar load, Bar-clip/O-ring association, presented the biggest stress concentration on the peri-implant region in relation to the others. When the second molar was loaded, there was a concentration of stress in the alveolar ridge in all situations analyzed. Within the limitation of this “in vitro” study, it could be concluded that there were biomechanical differences among the attachments systems analyzed, principally between isolated and the bars systems. The O-ring showed better stress distribution and the Bar-clip/O-ring showed higher stress concentration.

关键词： dental Implants Complete denture Overdentures

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Investigation of the Effects of Glazed Balconies uponThermal Comfort in Hot Tropical Region

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Journal of Civil Engineering and Architecture 2019年第12期13卷 762-779页

作者： Érica Coelho Pagel Edna Aparecida Nico Rodrigues Cristina Engel de Alvarez Neyval Costa Reis Júnior Bruna Perovano Sirtuli Filipe Galina Costalonga Jordana BernabéCoelho department of Architecture and City Universidade Vila Velha Av Comissario Jose Dantas De Mello 21Boa Vista IIVila VelhaES29102-920Brazil department of Architecture and Urbanism Universidade Federal do Espírito SantoAv.Fernando Ferrari 514VitóriaES29060-910Brazil department of Environmental Engineering Universidade Federal do Espírito SantoAv.Fernando Ferrari 514VitóriaES29060-910Brazil

The balcony is responsible to a series of effects on the environmental behavior of a building,mainly in relation of thermal comfort and air distribution to their indoor *** a very common practice in several metropolitan areas is the closing with retractable glass panels in balcony *** work analyzed the effects of glazed balconies upon thermal comfort in a hot tropical *** parameters were carried out in a flat alternating the conditions of retractable glass panels to *** simulations were performed considering closing or not the glass door that divides the balcony room;the building material used on the balcony sill;and the use of curtains or shading *** results show the maximum mean hourly temperatures recorded on the balcony during the period when the retractable glass panels were closed,reaching peaks between 31.7 and 39.2°C,above the comfort range recommended by ASHRAE *** situations simulated show the thermal discomfort prevails in the use of the closed glass panels reaching DhTD of 94.55°C/***,this practice of using most of the closed retractable glass panels in the balconies presents disadvantages and inefficiencies especially in hot and humid tropical climate regions.

关键词： Glazed balconies thermal comfort hot tropical region.

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