International Journal of Scientific Research in Knowledge最新文献_第7页

Impact of Asphalt Additives on Rutting Resistance of Asphalt Concrete 沥青添加剂对沥青混凝土抗车辙性能的影响

International Journal of Scientific Research in Knowledge Pub Date : 2014-03-01 DOI: 10.12983/IJSRK-2014-P0151-0159

S. Sarsam, Ibtihal Mouiad Laftaa

{"title":"Impact of Asphalt Additives on Rutting Resistance of Asphalt Concrete","authors":"S. Sarsam, Ibtihal Mouiad Laftaa","doi":"10.12983/IJSRK-2014-P0151-0159","DOIUrl":"https://doi.org/10.12983/IJSRK-2014-P0151-0159","url":null,"abstract":"Rutting is considered as one of the major pavement distresses of flexible pavement in Iraq. The hot weather duration for five months with 40-50 ⁰C has negative impact on the rutting resistance of asphalt concrete pavement. It was felt that modification of asphalt cement may be a possible solution to overcome such issue. In this paper, two penetration grade asphalt cement (40-50 and 60-70) have been modified in the laboratory by digestion with five types of locally available additives (fly ash; crumb rubber; fumed silica, sulfur; and Phospho-gypsum). Asphalt concrete mixture usually used for wearing course construction in Iraq as per SCRB specifications of 19 mm nominal size was considered in this investigation. Specimens were prepared using both of conventional asphalt cement and modified asphalt cement. The prepared modified asphalt concrete mixtures were evaluated by using Marshall Tests, resilient modulus determination (MR) and resistance to permanent deformation under repeated loads test, and then compared with the conventional mixture. The asphalt concrete mixtures modified by 10% fly ash by weight of asphalt cement (60-70) exhibit high resistance to permanent deformation as compared with the control mixture, while the mixture modified by 3% sulfur by weight of asphalt cement (60-70) generally showed lower resistance to permanent deformation as compared to the other tested mixtures. On the other hand, 1% of Phospho- gypsum by weight of asphalt cement (40-50) exhibit an improvement in rutting resistance. Sulfur and fly ash showed negative impact on rutting resistance for the range of load repetition studied.","PeriodicalId":14310,"journal":{"name":"International Journal of Scientific Research in Knowledge","volume":"49 1","pages":"151-159"},"PeriodicalIF":0.0,"publicationDate":"2014-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80830763","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: 9

Structural Model of the Relationship of Organizational Ethical Climate with Organizational Empathy and Civic Virtue: A Cognitive-Affective-Behavioral Approach to Ethics at Workplace 组织伦理氛围与组织共情、公民美德关系的结构模型:工作场所伦理的认知-情感-行为研究

International Journal of Scientific Research in Knowledge Pub Date : 2014-03-01 DOI: 10.12983/IJSRK-2014-P0160-0172

M. Golparvar, Afsaneh Rahmati Azarmonabadi

{"title":"Structural Model of the Relationship of Organizational Ethical Climate with Organizational Empathy and Civic Virtue: A Cognitive-Affective-Behavioral Approach to Ethics at Workplace","authors":"M. Golparvar, Afsaneh Rahmati Azarmonabadi","doi":"10.12983/IJSRK-2014-P0160-0172","DOIUrl":"https://doi.org/10.12983/IJSRK-2014-P0160-0172","url":null,"abstract":"Organizational ethical climate components are important factors for employees and organizations. In this regard, this study was administered to investigate the role of organizational ethical climate components for organizational empathy and civic virtue. The research design was correlation one and the sample consisted of 278 employees of railway company, Esfahan, Iran. The research instruments were organizational ethical climate questionnaire, organizational empathy scale and civic virtue questionnaire. The research hypotheses were analyzed by Pearson correlation coefficient and structural equation modeling. Furthermore of simple relationships between organizational ethical climate components with civic virtue and organizational empathy, the results of structural equation modeling indicated that during a series of relationships, caring and independence associate with civic virtue and rules and law along with service associate with organizational empathy. After all, the results of this study indicated that civic virtue and organizational empathy can be considered as variables with ethical based in the workplaces.","PeriodicalId":14310,"journal":{"name":"International Journal of Scientific Research in Knowledge","volume":"5 1","pages":"160-172"},"PeriodicalIF":0.0,"publicationDate":"2014-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78559574","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

Probability Distribution of Engineering Properties of Soil at Telecomunication Sites in Indonesia 印度尼西亚电信站点土壤工程特性的概率分布

International Journal of Scientific Research in Knowledge Pub Date : 2014-03-01 DOI: 10.12983/IJSRK-2014-P0143-0150

M. A. Dianty, A. Yahaya, F. Ahmad

{"title":"Probability Distribution of Engineering Properties of Soil at Telecomunication Sites in Indonesia","authors":"M. A. Dianty, A. Yahaya, F. Ahmad","doi":"10.12983/IJSRK-2014-P0143-0150","DOIUrl":"https://doi.org/10.12983/IJSRK-2014-P0143-0150","url":null,"abstract":"Engineering properties of soils, collected from different sites designated for the erection of telecommunication towers, were obtained and analyzed. Probability distribution functions were fitted to this properties. Probability distribution function were fitted to this properties to predict the incidences of their occurance.. Correlation analysis also carried out to check for the relationships if any between the properties. A linear relationship was observed between plastic index and liquid limit, saturated unit weight and angle of internal friction, saturated unit weight and dry unit weight, degree of saturation and water content,saturated unit weight and cohesion, saturated unit weight and dry unit weight. The void ratio,bulk unit weight and dry unit weight were found to follow normal distribution; water content, liquid limit and plasticity index followed the gamma distribution; gravity specification, porosity, saturation, angle of internal friction and cohesion fitted weibull distribution and saturated unit weight fitted log-normal distribution. The study also found that porosity and void ratio have high probability of occurance at their threshold levels. This indicates an unfavorable condition for the soil at this sites","PeriodicalId":14310,"journal":{"name":"International Journal of Scientific Research in Knowledge","volume":"19 1","pages":"143-150"},"PeriodicalIF":0.0,"publicationDate":"2014-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74735310","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: 5

Analysis of Lead(II) in Human Blood Using Dispersive Liquid-Liquid Microextraction and Graphite Furnace Atomic Absorption Spectrometry 分散液液微萃取-石墨炉原子吸收光谱法分析人血中铅(ⅱ)

International Journal of Scientific Research in Knowledge Pub Date : 2014-03-01 DOI: 10.12983/IJSRK-2014-P0116-0123

Ali Mazloomifar

{"title":"Analysis of Lead(II) in Human Blood Using Dispersive Liquid-Liquid Microextraction and Graphite Furnace Atomic Absorption Spectrometry","authors":"Ali Mazloomifar","doi":"10.12983/IJSRK-2014-P0116-0123","DOIUrl":"https://doi.org/10.12983/IJSRK-2014-P0116-0123","url":null,"abstract":"This paper established a new, rapid and sensitive method for the determination of lead in human blood samples preconcentrated by dispersive liquid-liquid microextraction (DLLME) prior to graphite furnace atomic absorption spectrometry. In the proposed approach, diphenylthiocarbazone (dithizone) was used as a chelating agent, and carbon tetrachloride and ethanol were selected as extraction and dispersive solvents. Important factors that would affect the extraction efficiency had been investigated including the kind and volume of extraction solvent and dispersive solvent, sample pH, the amount of chelating agent, extraction time and centrifugation time. The results showed that the coexisting ions contained in human blood samples had no obvious negative effect on the determination of lead. In the optimum experimental conditions, the limit of detection and enrichment factor were 0.04 ng mL -1 and 123, respectively. The relative standard deviation (RSD) for ten replicate determinations of 10 ng mL -1 was 2.87%. The linearity of method was between 0.10-200 ng mL -1 . The method was successfully applied for the analysis of lead in human blood samples. Keyword: Lead, Graphite furnace atomic absorption spectrometry, Dispersive liquid-liquid microextraction, human blood","PeriodicalId":14310,"journal":{"name":"International Journal of Scientific Research in Knowledge","volume":"61 1","pages":"116-123"},"PeriodicalIF":0.0,"publicationDate":"2014-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79066381","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

Solid Phase Extraction of trace Cu(II) Using N,N´-disalicylideneethylenediamine Modified Graphene to Determination by FAAS 原子吸收光谱法测定N,N′-二二烷基二胺修饰石墨烯固相萃取痕量Cu(II

International Journal of Scientific Research in Knowledge Pub Date : 2014-03-01 DOI: 10.12983/IJSRK-2014-P0134-0142

A. Moghimi, Sahar Pourhossein Akbarieh

引用次数: 0

A Study on the Relationship between Accounting Conservatism and Earnings Management in Teheran Stock Exchange Listed Companies 德黑兰证券交易所上市公司会计稳健性与盈余管理关系研究

International Journal of Scientific Research in Knowledge Pub Date : 2014-02-01 DOI: 10.12983/IJSRK-2014-P0105-0115

Abbas Ramezanzadeh Zeidi, Zabihollah Taheri, Ommolbanin Gholami Farahabadi

引用次数: 0

A Comparative Evaluation of Drug Release and Permeability of Ethylcellulose, Cellulose Acetate and Eudragit RS100 Microspheres 乙基纤维素、醋酸纤维素和芡实RS100微球的释药和透性比较

International Journal of Scientific Research in Knowledge Pub Date : 2014-02-01 DOI: 10.12983/IJSRK-2014-P0075-0082

Prakash Katakam, Saousen R. Diaf, B. Dey, S. K. Adiki, B. Chandu, K. Chowdary

{"title":"A Comparative Evaluation of Drug Release and Permeability of Ethylcellulose, Cellulose Acetate and Eudragit RS100 Microspheres","authors":"Prakash Katakam, Saousen R. Diaf, B. Dey, S. K. Adiki, B. Chandu, K. Chowdary","doi":"10.12983/IJSRK-2014-P0075-0082","DOIUrl":"https://doi.org/10.12983/IJSRK-2014-P0075-0082","url":null,"abstract":"Present study aims at comparative evaluation of drug release and permeability of diclofenac sodium loaded ethylcellulose (EC), cellulose acetate (CA) and eudragit (EU) microspheres. Microspheres of EC, CA and EU containing diclofenac sodium were prepared by an emulsification-solvent evaporation (oil-in-oil, o/o) method and were investigated for a comparative evaluation of various parameters. The microspheres were found discrete, free flowing, multinucleate, monolithic and spherical. About 5560% of all microspheres prepared were in the size range of -20+30 (715 m) mesh size. The encapsulation efficiency was in the range of 97.1106.4% with various polymers. The wall thickness of microspheres was in the range of 13.69-74.97m which depended on polymer employed and was directly proportional to polymer concentration. Diclofenac release from the microspheres was slow over longer periods of time and depended on the polymer used and coat:core ratio. Release was diffusion controlled and followed first order kinetics. Good linear relationships were observed between percent coat, wall thickness and release rate constant with all the three polymers. The slopes of percent coat vs release rate (k1) plots were found to be 0.4117, 0.2351 and 0.9762; and those of wall thickness (h) vs drug release rate (k1) plots were found 0.2549, 0.1863 and 0.7850 respectively for EC, CA and EU microspheres. The lower the slope the better is the controlling effect. Cellulose acetate exhibited better release-controlling effect than that of ethylcellulose and eudragit. The increasing order of diclofenac release rate and permeability observed with various microspheres was, cellulose acetate < ethylcellulose < eudragit RS100. The possible permeability of drug from the prepared porous micrsopheres could be due to osmotic pressure generated by diclofenac.","PeriodicalId":14310,"journal":{"name":"International Journal of Scientific Research in Knowledge","volume":"60 1","pages":"75-82"},"PeriodicalIF":0.0,"publicationDate":"2014-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88436952","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

Bioinformatics Prediction of Interaction Silver Nanoparticles on the Disulfide Bonds of HIV-1 Gp120 Protein 银纳米粒子对HIV-1 Gp120蛋白二硫键相互作用的生物信息学预测

International Journal of Scientific Research in Knowledge Pub Date : 2014-02-01 DOI: 10.12983/IJSRK-2014-P0067-0074

S. Gavanji, H. Mohabbatkar, H. Baghshahi, A. Zarrabi

引用次数: 5

Investigation of a Proposed Four Storey Building Sites Using Geophysical and Laboratory Engineering Testing Methods in Lagos, Nigeria 利用地球物理和实验室工程测试方法对尼日利亚拉各斯拟议的四层建筑场地进行调查

International Journal of Scientific Research in Knowledge Pub Date : 2014-02-01 DOI: 10.12983/IJSRK-2014-P0083-0091

O. K. Festus, A. Lukman, O. Sunday, K. Akintunde

{"title":"Investigation of a Proposed Four Storey Building Sites Using Geophysical and Laboratory Engineering Testing Methods in Lagos, Nigeria","authors":"O. K. Festus, A. Lukman, O. Sunday, K. Akintunde","doi":"10.12983/IJSRK-2014-P0083-0091","DOIUrl":"https://doi.org/10.12983/IJSRK-2014-P0083-0091","url":null,"abstract":"The spate of engineering structures collapse in Lagos metropolis with its attendant loss of lives and properties has assumed an alarming proportion in recent times. Efforts to mitigate such incidence has necessitated an integrated geophysical and geotechnical investigation of a proposed four storey building sites with a view to determine the suitability of the site for the proposed project. Resistivity investigation, un-drained multi-stage triaxial compression and oedometer consolidation tests were carried out to determine the engineering properties of the subsurface. The results revealed peaty clay to silty sand materials characterized by 35kN/m 2 75kN/m 2 cohesion values, (5°-13°) internal friction, 29.3% 64.5% natural water content and 1.652 – 1.972 Mg/m 3 bulk density. The allowable bearing capacity of 50 kN/m 2 , volume compressibility from 0.115 m 2 /MN to 0.666 m 2 /MN, initial void ratio and consolidation coefficient of 0.779 1.381 and 2.7 m 2 /year 8.3 m 2 /year respectively on the pressure range of 0 to 400 kN/m 2 and estimated settlement values of 114 to 273 mm were obtained for the site materials. These results are indicative of soft to stiff clays and presence of sands and silts in the essentially clayey deposit. The study area is thus underlain by extensive zone of ductile and low strength founding materials having medium to high compressibility and settlement value that exceeds the tolerable limit suitable for founding a four storey building and should therefore be avoided. These characteristics preclude the use of conventional shallow foundations, piles or vibro-replacement up","PeriodicalId":14310,"journal":{"name":"International Journal of Scientific Research in Knowledge","volume":"250 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2014-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77484777","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: 4

The Prediction of Disulphide Bonding in HIV and other lenti-viruses by Machine Learning Techniques 用机器学习技术预测HIV和其他慢病毒的二硫化物结合

International Journal of Scientific Research in Knowledge Pub Date : 2014-02-01 DOI: 10.12983/IJSRK-2014-P0057-0066

Anubha Dubey

引用次数: 0