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Israa University Journal for Applied Science最新文献

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The Behevior of Lauryl glucoside as cement paste admixture 月桂糖苷作为水泥浆体掺合料的性能
Israa University Journal for Applied Science Pub Date : 2017-10-01 DOI: 10.52865/mcnl6514
Abdel Fattah . Qarama, Alaa Musalum, Ibrahim Alhassayna
{"title":"The Behevior of Lauryl glucoside as cement paste admixture","authors":"Abdel Fattah . Qarama, Alaa Musalum, Ibrahim Alhassayna","doi":"10.52865/mcnl6514","DOIUrl":"https://doi.org/10.52865/mcnl6514","url":null,"abstract":"The use of air entraining agents have been accepted practice in cement technology for many years. A large number of uniform and stable micro bubbles is intentionally entrained to improve the durability and reduce the potential for damage from freezing and thawing, but these bubbles are inversely affected the hardened cement paste compressive strength. The Physiochemical and Mechanical Properties of cement pastes containing synthetic nonionic surfactant Lauryl glucoside (LG) as air-entraining agents are investigated. Different cement pastes with and without LG are prepared for five interval times (3, 7, 28, 90 and 360 days). The influence of the different surfactant concentrations on the air content of the pastes and accordingly the bulk density, compressive strength and microstructure of the hardened cement specimens is discussed. The optimal level of factors to achieve the desired goals are determined. The results show that LG causes a uniform distribution of small air voids in the cement paste, beside its ability to accelerate the hydration reaction, which may greatly improve the compressive strength of the pastes.","PeriodicalId":223912,"journal":{"name":"Israa University Journal for Applied Science","volume":"127 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133447243","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
Gaussian Copula Simulation Model For Pavement Fatigue Cracking Prediction Based On Cumulative Damage Using Miner's Law 基于Miner定律的累积损伤路面疲劳裂纹预测的高斯耦合仿真模型
Israa University Journal for Applied Science Pub Date : 2017-10-01 DOI: 10.52865/qgpz2147
O. Muhaisen
{"title":"Gaussian Copula Simulation Model For Pavement Fatigue Cracking Prediction Based On Cumulative Damage Using Miner's Law","authors":"O. Muhaisen","doi":"10.52865/qgpz2147","DOIUrl":"https://doi.org/10.52865/qgpz2147","url":null,"abstract":"This article offers a new model for characterizing fatigue cracking distribution under mixed traffic loading. Using Gaussian copula, the researcher modelled the joint distribution of the allowable load repetitions and the cumulative mixed traffic loading, in order to estimate the percentage of fatigue cracking. The results of the simulation study using the proposed copula-based model is compared to the popular fatigue cracking models, and the results revealed that copula approach is quite appropriate for predicting the fatigue cracking. The proposed model is considering long-range traffic loading as renewal operation and using the fatigue equation to characterize the distribution of allowable number of traffic load repetitions.","PeriodicalId":223912,"journal":{"name":"Israa University Journal for Applied Science","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133676071","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
Assessment of dyslipidemia among hypertensive pregnant women in Gaza Strip 加沙地带高血压孕妇血脂异常的评估
Israa University Journal for Applied Science Pub Date : 2017-10-01 DOI: 10.52865/zdrq1624
Atef Masad
{"title":"Assessment of dyslipidemia among hypertensive pregnant women in Gaza Strip","authors":"Atef Masad","doi":"10.52865/zdrq1624","DOIUrl":"https://doi.org/10.52865/zdrq1624","url":null,"abstract":"The aim of this study is to assess dyslipidemia status among hypertensive pregnant women and to correlate with preeclampsia in Gaza Strip. A cross sectional study was conducted on 85 pregnant women attending the Gynecology and Obstetrics Department of tertiary care in Gaza Strip (49-hypertension pregnant woman as patients and 36 normal pregnant women without hypertension as a control). Pregnancy induced hypertension (PIH) was found to be associated with fetus sex and it was higher with male fetus 28.6 % and twins 12.2% compared with control. The majority of the PIH patient were obese BMI (32.9 ±4.6) compared with control (25.7±3.5) (P < 0.001). Serum cholesterol, triglycerides, LDL-C, among PIH patients were high (175.3±56.6, 226.9±130.1, 67.4±51.4 mg/dl) respectively, compared with control (143.8±44.1, 186.3 ±101.3, 48.9±46.5 mg/dl) respectively. Abnormal lipid profile and low HDL-C levels may add to the promotion of vascular dysfunction during pregnancy and may induce hypertension and eventually pre-eclampsia and serious complications of fetus.","PeriodicalId":223912,"journal":{"name":"Israa University Journal for Applied Science","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125087866","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
Indoor Air Pollutants Concentrations Influenced By Dust Storm Event In Selected Schools In Gaza Strip 加沙地带部分学校室内空气污染物浓度受沙尘暴影响
Israa University Journal for Applied Science Pub Date : 2017-10-01 DOI: 10.52865/ohrr3972
Maher Elbayoumi
{"title":"Indoor Air Pollutants Concentrations Influenced By Dust Storm Event In Selected Schools In Gaza Strip","authors":"Maher Elbayoumi","doi":"10.52865/ohrr3972","DOIUrl":"https://doi.org/10.52865/ohrr3972","url":null,"abstract":"Dust storm episode is a common transboundary phenomenon affecting the Eastern Mediterranean region, with significant impact on air quality. Quantitative information on the influence of Dust storm episodes in the indoor environment is still lacking. Real-time PM10, PM2.5, levels were measured in outdoor and indoor air before and during dust storm event in 2012. Relationships between indoor and outdoor pollutants concentrations were examined and discussed. The analysis revealed a significant contribution of dust storm event to the indoor PM levels. The average mass concentration of indoor PM2.5 was increased by a factor of 3 during the dust storm period (215.19±(93.73)μg/m3) as compared to non- dust storm period (67.44±(32.46)μg/m3) and exceeded the values set WHO guideline (25μg/m3). The results show a high contribution of dust storm episode in PM2.5 concentrations in PM10 (PM2.5/PM10) where the average indoor and outdoor ratios during dust event were 0.28 and 0.40, respectively. The I/O ratio values were found to be influenced by outdoor sources for all pollutants during the non-dust and dust periods. The results serve to improve our understanding of dust episode, which may have implications for a development of approaches to control outdoor originated indoor PM and improve indoor quality.","PeriodicalId":223912,"journal":{"name":"Israa University Journal for Applied Science","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129557551","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
Spectral Studies of Nanosecond Laser Interaction with Aluminum-Based Alloy Containing Traces of Magnesium in Air 纳秒激光与空气中含微量镁铝基合金相互作用的光谱研究
Israa University Journal for Applied Science Pub Date : 2017-10-01 DOI: 10.52865/vhep7136
S. Mansour, A. E. El Sherbini, S. Allam, T. E. El Sherbini
{"title":"Spectral Studies of Nanosecond Laser Interaction with Aluminum-Based Alloy Containing Traces of Magnesium in Air","authors":"S. Mansour, A. E. El Sherbini, S. Allam, T. E. El Sherbini","doi":"10.52865/vhep7136","DOIUrl":"https://doi.org/10.52865/vhep7136","url":null,"abstract":"Parametric study of optical emission Characterization of the plasma-assisted laser ablation of aluminium-based alloy that contains small traces of magnesium is presented. The emission of lines from the plasma of the target in the wavelength range 200-900nm has been carefully investigated at the same experimental conditions. It was found that all the emission intensities of the ionic and neutral magnesium lines are subjected to self-absorption, whereas the aluminium ionic lines were free from self-absorption. The results assure that, in case of the presence of self- absorption effect, the temperature varies from (1.7952 - 1.1433 eV) as the delay time is varied from 0 to 5 μs. Whereas, in the case of repairing against the effect, it varies from (1.3240 - 0.9447 eV) for the same delay time variation. At the same time, according to the McWhirter criterion, the electron density was high enough to establish plasma in local thermodynamic equilibrium.","PeriodicalId":223912,"journal":{"name":"Israa University Journal for Applied Science","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131190396","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
Morphology control and mechanical properties of monoacrylates polymers prepared by UV and Electron Beam photopolymerization 紫外和电子束光聚合制备的单丙烯酸酯聚合物的形态控制和力学性能
Israa University Journal for Applied Science Pub Date : 2017-10-01 DOI: 10.52865/xzld7069
Amaar Elqidrea, U. Maschke
{"title":"Morphology control and mechanical properties of monoacrylates polymers prepared by UV and Electron Beam photopolymerization","authors":"Amaar Elqidrea, U. Maschke","doi":"10.52865/xzld7069","DOIUrl":"https://doi.org/10.52865/xzld7069","url":null,"abstract":"The morphology and the mechanical properties of the polymer networks have been investigated under UV and electron beam irradiation based on the molecular weight distribution of the polymer chains. It has been observed that the molar mass and the length of the polymer chain have a major effect in determining the morphology and mechanical properties of the polymer. The morphology and the architecture of the polymer chains can be controlled by varying the intensity of the UV and electron beam doses during the photopolymerization.","PeriodicalId":223912,"journal":{"name":"Israa University Journal for Applied Science","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131092304","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
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