ARCHiveSR最新文献_第8页

Properties of PMMA Bone Cement Modified with Nano-hydroxyapatite and Acetone 纳米羟基磷灰石和丙酮改性PMMA骨水泥的性能研究

ARCHiveSR Pub Date : 2019-01-01 DOI: 10.21625/ARCHIVE.V2I4.393

A. Zaza, M. Habib, N. Fatahalla

{"title":"Properties of PMMA Bone Cement Modified with Nano-hydroxyapatite and Acetone","authors":"A. Zaza, M. Habib, N. Fatahalla","doi":"10.21625/ARCHIVE.V2I4.393","DOIUrl":"https://doi.org/10.21625/ARCHIVE.V2I4.393","url":null,"abstract":"Fracture in the adjacent levels is one of the consequences to the use of commercial poly methylmethacrylate (PMMA) bone cement. Modified PMMA with a reduced Young’s modulus was found to be safer for cancellous bone augmentation procedures. The aim of this research was to study the effect of adding hydroxyapatite (HA) nano-particles and acetone on different properties of PMMA cement. A commercial PMMA cement was used as a model for bone cement. Three groups of modified PMMA/nano-HA were investigated by adding 2, 4 and 6 wt. % of HA. Acetone as a porogen mixed with distilled water in different amounts (A/W: 1:1, 2:1.5 and 2:1g) was used to produce porous PMMA cement. The residual monomer, polymerization and mechanical properties under tension and compression tests were investigated. Young’s modulus detected from compression test decreased from 826.5±10 to 728±66 MPa by adding 6wt.% HA. Adding acetone to PMMA with 2:1.5g (A/W) has decreased the compressive Young’s modulus to 753±38 MPa. High Performance Liquid Chromatography (HPLC) measurements were carried out with intervals of 2 hours, 6 hours and 24 hours to evaluate the residual monomer for all groups. The amount of residual monomer has decreased after 24 hours of curing by adding acetone and nano-HA. Modifying PMMA by HA and acetone have inconsistent effect on the polymerization temperature. It was concluded that HA and acetone can be used to reduce the stiffness and residual monomer with enhanced biocompatibility of the commercial PMMA bone cement.","PeriodicalId":33666,"journal":{"name":"ARCHiveSR","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68576628","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Integrative Framework of Kansei Engineering (KE) and Kano Model (KM) applied to Light Bulb Changer Kansei Engineering（KE）和Kano Model（KM）的集成框架在灯泡更换器中的应用

ARCHiveSR Pub Date : 2019-01-01 DOI: 10.21625/ARCHIVE.V2I4.392

S. Backar

引用次数: 1

A Feasibility Study Evaluating the Efficiency of Fine Coal Washing Using Gravity Separation Methods 评价重选细煤洗选效率的可行性研究

ARCHiveSR Pub Date : 2019-01-01 DOI: 10.21625/ARCHIVE.V2I4.394

A. Modiga, N. Sosibo, N. Singh, Getrude Marape

{"title":"A Feasibility Study Evaluating the Efficiency of Fine Coal Washing Using Gravity Separation Methods","authors":"A. Modiga, N. Sosibo, N. Singh, Getrude Marape","doi":"10.21625/ARCHIVE.V2I4.394","DOIUrl":"https://doi.org/10.21625/ARCHIVE.V2I4.394","url":null,"abstract":"Coal mining and washing activities in South Africa often lead to the generation of \u0000fine and ultra-fine coal which is in most cases discarded due to high handling and \u0000transportation costs. Studies conducted revealed that a large quantity of these fines \u0000have market acceptable calorific values and lower ash contents. In order to reduce \u0000fines discarded, processes have been developed to re-mine and process the fine coal \u0000discards with the aim of improving the calorific value, adding them to coarse washed \u0000coal to increase the yield as well as pelletizing the fines so as to meet the market \u0000specifications in terms of size. \u0000The goal of this study was to evaluate the efficiency of fine coal washing using \u0000gravity separation methods and comparing the products thereof to the market \u0000specifications with regards to the calorific value and the ash content. Coal fines from \u0000the No.4 lower seam of the Witbank coalfield in South Africa resulting from a dry \u0000coal sorting plant were subjected to a double-stage spiral test work, heavy liquid \u0000separation and reflux classifier test work respectively. \u0000The reflux classifier achieved products with low ash content and an increased \u0000calorific value, at high mass yields. At higher fluidization water flowrate, the reflux \u0000classifier performance was superior to that of the spirals with products of lower ash \u0000content and higher calorific value. At low cut point densities, heavy liquid separation \u0000yielded the cleanest products with very low ash content but at much lower mass \u0000yields. As the density increased, the mass yields increased with the ash content while \u0000the calorific value decreased. Most of the products from the different processes met \u0000most of the local industries’ specifications but none of them met the export market \u0000as well as the gold and uranium industry specifications due to the high ash content.","PeriodicalId":33666,"journal":{"name":"ARCHiveSR","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45824567","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Availability and Feasibility of Demand Side Management Projects in Egypt 埃及需求侧管理项目的可用性和可行性

ARCHiveSR Pub Date : 2019-01-01 DOI: 10.21625/ARCHIVE.V2I4.386

M. Gaber, A. Atef, Amr El Zawawi, M. Salah

引用次数: 0

Material’s Perception Strategy in Terms of Adaptive Re-use Within the Computational, and Parametricism Context 在计算和参数化背景下，材料的自适应再利用感知策略

ARCHiveSR Pub Date : 2019-01-01 DOI: 10.21625/ARCHIVE.V2I4.367

S. Mansour

{"title":"Material’s Perception Strategy in Terms of Adaptive Re-use Within the Computational, and Parametricism Context","authors":"S. Mansour","doi":"10.21625/ARCHIVE.V2I4.367","DOIUrl":"https://doi.org/10.21625/ARCHIVE.V2I4.367","url":null,"abstract":"Creativity has been assigned to the design or drawing, with materials most often being specified as a result of design rather than being considered a driver of it. Designers empowered by new technology now consider form as it is defined by identifiable systems. This evidence based, parametric methodology is a response to two decades of digitally-derived projects, often produced simply for their novelty. The best work results when the architect has combined respect for the old with a skilled progressive command of the new. Material culture is portrayed as the physical confirmation and articulation of a culture in its relics and design. In the time that we comprehend the thought of material culture not just as having importance for investigations of the past. yet in addition getting a projective limit. we may now be at a critical defining moment.. As computation starts to significantly change our origination of the material, so in architecture this will defy the set up connection between the procedures of design and the physical fabrication of the constructed medium . Obviously, computation was brought into design & architecture the greater part a century back. furthermore, expanding digitization has since plagued all parts of the field . As though, it has remained emphatically impacted by the theoretical isolation of the procedures of design and making that has overwhelmed structural plan thinking since the Renaissance, and it is just now that creators are starting to deal with the computational void as never again disconnecting from the physical domain.","PeriodicalId":33666,"journal":{"name":"ARCHiveSR","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68576285","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Approach to Accurate Octane Number Calculation for Gasoline Blending 汽油调合辛烷值精确计算方法

ARCHiveSR Pub Date : 2019-01-01 DOI: 10.21625/ARCHIVE.V2I4.395

M. Metwally

{"title":"Approach to Accurate Octane Number Calculation for Gasoline Blending","authors":"M. Metwally","doi":"10.21625/ARCHIVE.V2I4.395","DOIUrl":"https://doi.org/10.21625/ARCHIVE.V2I4.395","url":null,"abstract":"The octane number of gasoline is one of the most important measures of gasoline quality to predict accurately the octane ratings of blending gasolines. This measured on a scale that ranges from that equivalent to isooctane (octane number of 100) to that of n-heptane (octane number of zero) octane no is effected by the saturates, aromatics, and olefins contents of gasoline. We take it as a standard and measure octane number by comparison with this standard. The accurate octane blending method will optimize the blending of gasoline components, when gasoline components are blended together, we will calculate the octane number of the blend with different octane number of the component or if the four components are of equal octane number. The blend octane number may be greater than, equal to or less than that calculated from the volumetric average of the octane numbers of the blend components, which indicates nonlinear blending. Blending would be linear if octane number of a blend was equal to that predicted by summing the octane numbers of the components in proportion to their concentrations. In practices, the discrepancies between the octane numbers of blends and the linearly predicted values have been correlated by specific empirical equations and these have been used to correct the linear predictions.","PeriodicalId":33666,"journal":{"name":"ARCHiveSR","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68576774","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Heterogeneous Reservoir Characterization (Upper Bahariya Case study) 非均质储层表征(上巴哈里亚案例研究)

ARCHiveSR Pub Date : 2019-01-01 DOI: 10.21625/ARCHIVE.V2I4.396

A. Bayoumi, E. Gomaa, A. Hamdy

引用次数: 6

Sustainability of Construction Aggregates in Kuwait 科威特建筑骨料的可持续性

ARCHiveSR Pub Date : 2019-01-01 DOI: 10.21625/ARCHIVE.V2I4.384

S. Al-Fadala

{"title":"Sustainability of Construction Aggregates in Kuwait","authors":"S. Al-Fadala","doi":"10.21625/ARCHIVE.V2I4.384","DOIUrl":"https://doi.org/10.21625/ARCHIVE.V2I4.384","url":null,"abstract":"Kuwait is facing a current construction boom with projects worth of more than USD188bn. The huge infrastructure spending plan of Kuwait is reflected with a growing demand of concrete as concrete is the most commonly used building material in the local construction. At the present, the quarrying of coarse aggregate which is a main concrete constituent material is banned in Kuwait since 1997 and construction industry depends on the imported coarse aggregates from neighbouring sources such as United Arab Emirates and Iran. Kuwait is also interested in challenging the growing concern of an effective environmental management of water, land and atmosphere to achieve a sustainable civilization. \u0000The increasingly environmental pressures coupled with the limited available economical resources are causing the decision making authorities to consider the practice of recycling and waste utilization. This paper presents Kuwait Institute for Scientific Research (KISR) efforts to investigate sustainable sources of coarse aggregate for construction industry from waste. The first sustainable source investigated is the production of synthetic lightweight aggregates utilizing combinations of argillaceous indigenous and waste materials, and the second is recycled aggregates from construction and demolition wastes. The potential of the two sustainable sources of construction aggregates are presented and the needed steps for real industrial application are addressed.","PeriodicalId":33666,"journal":{"name":"ARCHiveSR","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46306292","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Research of One-Dimensional Consolidation of Clays Considering Their Rehological Properties 考虑流变特性的粘土一维固结研究

ARCHiveSR Pub Date : 2019-01-01 DOI: 10.21625/ARCHIVE.V2I4.383

Chen Zhuo, D. Jingen, Y. Baohua, Weng Haoyang, Wang Jie, Yan Xinjiang

引用次数: 0

The Correlation of Deconstruction Architecture to Arab Architectural Identity 解构主义建筑与阿拉伯建筑身份的关系

ARCHiveSR Pub Date : 2019-01-01 DOI: 10.21625/ARCHIVE.V2I4.369

Emad H. Rabboh, Ali A. Elmansory

{"title":"The Correlation of Deconstruction Architecture to Arab Architectural Identity","authors":"Emad H. Rabboh, Ali A. Elmansory","doi":"10.21625/ARCHIVE.V2I4.369","DOIUrl":"https://doi.org/10.21625/ARCHIVE.V2I4.369","url":null,"abstract":"The Arab architectural identity is characterized by the originality of the various Arab \u0000cultures. Islamic culture is what makes Arab societies unique and it is what inspired \u0000Arab architecture. Consequently, the Arab architecture encounters contemporary \u0000challenges. If modern architectural trends influenced Arab civilization, it could then \u0000obliterate its identity over the years. Moreover, positively interacting with modern \u0000architectural trends must take place rather than negative interactions. The aforementioned reasons leave this phenomenon the subject of discussion and research \u0000and thus the lack of update and development of the vocabulary of Arab architecture. \u0000The proposed study discusses the problem of the correlation of deconstructive \u0000architecture with the architectural and Arabic identity through the end of the 20th \u0000century until 2017. In order to arrive at the definition of the philosophy of \u0000deconstruction architecture and the appropriate relationship between it and the Arab \u0000architectural identity, the study utilizes a qualitative descriptive methodology that tries \u0000to give a generic image of philosophy and characteristics. Deconstruction architecture \u0000attempts to link the positive aspects of architecture and Arab identity through the \u0000analysis of the frameworks of this philosophy of particular architectural works of \u0000various architects who adopt this philosophy of architecture. Responding to the above, \u0000the current study shows that it is better to strip the modern trends and take what suits \u0000the Arab culture.","PeriodicalId":33666,"journal":{"name":"ARCHiveSR","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47904173","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0