International Journal of Applied Science and Engineering最新文献_第10页

Predicting of geopolymer concrete compressive strength using multiple linear regression method 用多元线性回归法预测地聚合物混凝土抗压强度

International Journal of Applied Science and Engineering Pub Date : 2022-01-01 DOI: 10.6703/ijase.202203_19(2).006

Lindry Lydia Karongkong, A. Setiawan, H. Hardjasaputra

引用次数: 0

Spectral and thermal characteristics of energy transferred polymeric solid dye mixtures 能量转移聚合物固体染料混合物的光谱和热特性

International Journal of Applied Science and Engineering Pub Date : 2022-01-01 DOI: 10.6703/ijase.202209_19(3).003

Ju Yong Cho, W. Jang

{"title":"Spectral and thermal characteristics of energy transferred polymeric solid dye mixtures","authors":"Ju Yong Cho, W. Jang","doi":"10.6703/ijase.202209_19(3).003","DOIUrl":"https://doi.org/10.6703/ijase.202209_19(3).003","url":null,"abstract":"We synthesized two solid dye mixtures with Coumarin-545 and Rhodamine-6G without a drying step, but it showed the comparable spectral and material properties with other reported solid dyes, despite a simplified synthesizing process. Coumarin-545 was selected as donor dye, because its fluorescence spectrum was well coincided to the absorption spectrum of Rhodamine-6G, for efficient energy transfer mechanism. We investigated the spectral characteristics with two molarities of 0.1 mM and 0.3 mM of Coumarin-545, at fixed molarity of 0.1 mM of Rhodamine-6G. The fluorescence peak and spectral width of the first one, 0.1 mM molarity for both dyes, appeared at 556 nm and 63 nm, which were 4 nm shorter and 16 nm wider than those of Rhodamine-6G only, respectively. On the other hand, the second one, 0.3 mM molarity for donor, showed 555 nm and 61 nm in their fluorescence peak and spectral width, respectively, which were also 5 nm shorter and 14 nm broader than those of Rhodamine-6G only. The second solid dye mixture showed a little shorter fluorescence peak and a narrower spectral width, compared to the first one. Maximum temperature at the spot where the sample is irradiated by a pumping laser source is investigated. The first one showed the maximum temperature raised from 30°C to 38°C, when a pumping laser power increases from 50 mW to 200 mW. On the other hand, the maximum temperature of the second one raised from 34°C to 53°C, when an output power of the source increases from 50 mW to 200 mW, due to larger absorption of pumping power than the first one.","PeriodicalId":13778,"journal":{"name":"International Journal of Applied Science and Engineering","volume":"51 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78349266","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

Monitoring soil resilience via the dynamic changes of selected physicochemical properties of soil in a tropical rehabilitated forest 利用热带恢复森林土壤理化性质动态变化监测土壤恢复力

International Journal of Applied Science and Engineering Pub Date : 2022-01-01 DOI: 10.6703/ijase.202212_19(4).005

Muhamad Khairulamiin Md Taha, Azham Mohamad, Intan Soraya Che Sulaiman, I. Isa, M. N. Khairuddin

{"title":"Monitoring soil resilience via the dynamic changes of selected physicochemical properties of soil in a tropical rehabilitated forest","authors":"Muhamad Khairulamiin Md Taha, Azham Mohamad, Intan Soraya Che Sulaiman, I. Isa, M. N. Khairuddin","doi":"10.6703/ijase.202212_19(4).005","DOIUrl":"https://doi.org/10.6703/ijase.202212_19(4).005","url":null,"abstract":"Recovery of soil organic matter and mineral nutrient cycling are critical to the success of rehabilitation process of replanted forest. We investigated the dynamic changes in soil of selected physicochemical properties including organic carbon (C), nitrogen (N), phosphorus (P) and sulphur (S) of replanted forest rehabilitation that had been previously disturbed by anthropogenic activities. Soil samples were collected from the rehabilitated forest of three ages stands (3-, 12- and 23-years old) while samples from adjacent secondary forest was collected for comparison. Altogether, 36 samples were taken randomly with a soil auger at depths of 0-20 cm from a plot of 20 × 20 m 2 at each site. Soils were analyzed for pH, bulk density, C, N, P and S. The data obtained were statistically analyzed using ANOVA with Tukey’s test performed by SAS 9.2 at P ≤ 0.05. Results showed that total C, N, P, C/N ratio and C/S ratio increased with age of rehabilitated forest except for pH, S and C/P ratio. Forest rehabilitation by planting indigenous tree species has shown a potential of recovery, but further investigation into the process control of the dynamic changes of soil physicochemical properties, particularly in the event of further ecosystem disturbance is needed.","PeriodicalId":13778,"journal":{"name":"International Journal of Applied Science and Engineering","volume":"3 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85402237","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

Case study of an aged paper tube structure 老化纸管结构实例研究

International Journal of Applied Science and Engineering Pub Date : 2022-01-01 DOI: 10.6703/ijase.202203_19(1).008

Ming-Gin Lee, Wei-Chien Wang, Y. Kan, H. Lo, E. Yatsenko, Hong-You Lee

引用次数: 0

Numerical analysis on load-settlement response of reinforced granular blanket over ordinary stone column 普通石柱上加筋颗粒毡层荷载沉降响应数值分析

International Journal of Applied Science and Engineering Pub Date : 2022-01-01 DOI: 10.6703/ijase.202209_19(3).006

H. Gupta, R. S. Sathe, J. Sharma

{"title":"Numerical analysis on load-settlement response of reinforced granular blanket over ordinary stone column","authors":"H. Gupta, R. S. Sathe, J. Sharma","doi":"10.6703/ijase.202209_19(3).006","DOIUrl":"https://doi.org/10.6703/ijase.202209_19(3).006","url":null,"abstract":"Stone columns are a more economical and efficient method to enhance the strength of expansive soils. Using a granular blanket over the top of the ordinary stone columns (OSC) improves the drainage and distribution of the applied stress impending from the superstructure. The present study studied the effect of geogrid layers in a granular blanket (GB) over the top of the OSC numerically using 'PLAXIS 2D'. 'Mohr-Coulomb failure criterion was deliberated for the stone column, granular blanket, expansive soil, and elastoplastic behavior is considered for geogrid layers as reinforcement. Present review results are validated with the experimental results and agree greatly. Numerical results show that the construction of a GB with a geogrid layer over the stone column increases stress transformation to the depth of OSC. Thus 'stress concentration' is decreased in the higher zone of the OSC. Likewise, assessing the impact of geogrid layers in a granular blanket on the 'bearing capacity and settlement of OSC, it was observed that it reduces the lateral bulging, settlement and increases the ground's bearing capacity.","PeriodicalId":13778,"journal":{"name":"International Journal of Applied Science and Engineering","volume":"9 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88255344","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

Impact of diameter to thickness (D/t) on axial capacity of circular CFST columns: Experimental, parametric and numerical analysis 直径/厚度(D/t)对圆形钢管混凝土柱轴向承载力的影响:试验、参数和数值分析

International Journal of Applied Science and Engineering Pub Date : 2022-01-01 DOI: 10.6703/ijase.202206_19(2).005

Shaik Madeena Imam Shah, G. Ganesh

{"title":"Impact of diameter to thickness (D/t) on axial capacity of circular CFST columns: Experimental, parametric and numerical analysis","authors":"Shaik Madeena Imam Shah, G. Ganesh","doi":"10.6703/ijase.202206_19(2).005","DOIUrl":"https://doi.org/10.6703/ijase.202206_19(2).005","url":null,"abstract":"Twenty-four circular Concrete Filled Steel Tube (CFST) columns divided in to three series based on their cross-sectional dimensions were subjected to uni-axial compression and their behaviour is studied. This paper aims to develop the volume of experimental database as there is shortage in data that can assess the guidance from the codes and enhances their accuracy in determining the ultimate capacities and the behaviour of CFST specimens subjected to uni axial compression. This study consists of CFST specimens having outer diameter of 76 mm, 89 mm and 100 mm with same wall thickness of 3 mm having four Length to Diameter (L/D) ratios of 3, 4, 5 and 6. Impact of D/t on the parameters like confinement (ξ), strength index (SI), relative slenderness ratio (λ), percentage contribution of steel and concrete and ductility index (DI) were studied. Further, the axial compressive load values were compared with the predicted design values of codes, namely, Eurocode – 4 (EC4), American code (AISC 360-10), Australian code (AS5100), Chinese code (DBJ13-51) and American Concrete Institute (ACI-318). A design equation is proposed to calculate the ultimate axial load and the predicted results are near to the test results. To check the accuracy of the proposed equation, experimental results of 63 CFST circular columns from the literatures were compared with proposed equation and found the results to be conservative. At last, finite element analysis using ABAQUS was done to study the behaviour of column buckling, axial load and displacement curves. Results showed good agreement with experimental test results.","PeriodicalId":13778,"journal":{"name":"International Journal of Applied Science and Engineering","volume":"16 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88090287","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

The effect of model scale, acceleration history, and soil condition on closed-ended pipe pile response under coupled static- dynamic loads 模型尺度、加速度历史和土体条件对动静耦合作用下闭端管桩响应的影响

International Journal of Applied Science and Engineering Pub Date : 2022-01-01 DOI: 10.6703/ijase.202206_19(2).007

Duaa Al-Jeznawi, I. Jais, B. Albusoda

引用次数: 2

Agile project management for design-build construction projects: a case study 设计-建造-建造项目的敏捷项目管理:案例研究

International Journal of Applied Science and Engineering Pub Date : 2022-01-01 DOI: 10.6703/ijase.202203_19(1).001

Saurabh S. Jethva, M. Skibniewski

引用次数: 3

Tetrapak waste treatment using microwave pyrolysis to produce alternative gas fuels 利用微波热解处理利乐废弃物，生产替代气体燃料

International Journal of Applied Science and Engineering Pub Date : 2022-01-01 DOI: 10.6703/ijase.202212_19(4).008

Ilham Ayu Putri Pratiwi, H. Saptoadi, J. Sentanuhady, C. Purnomo, T. A. Rohmat

{"title":"Tetrapak waste treatment using microwave pyrolysis to produce alternative gas fuels","authors":"Ilham Ayu Putri Pratiwi, H. Saptoadi, J. Sentanuhady, C. Purnomo, T. A. Rohmat","doi":"10.6703/ijase.202212_19(4).008","DOIUrl":"https://doi.org/10.6703/ijase.202212_19(4).008","url":null,"abstract":"Tetrapak waste is one of the most abundant wastes in the world. It consists of layers of paper, LDPE, and aluminium foil. It is difficult to recycle, however it can be converted into valuable gaseous fuel if processed by microwave heat using a dual reactor catalytic process, SiC as microwave absorber, and natural zeolite as catalyst. The sample was pyrolyzed at different Microwave Output Power (MOP) levels (300, 450, 600, and 800 W) and Catalytic Temperatures (CT) levels (350, 400, 450, and 500°C) for 30 minutes. The results showed that the MOP and CT levels positively affect the increase of the yield and improve the heating value of the gas product. For instance, at 800 W, the gas yield increased from 73 wt.% in the process without catalyst to 78 wt.% in the catalytic temperature of 500°C. The same effect occurred when various MOP levels were used. The gas yield increased when the MOP level raised. H 2 , CH 4 , CO, CO 2 , and other hydrocarbons with low molecular weights (C 2+ ) are the major components of gas products. The presence of catalyst, an increase in CT, and a rise in MOP all boosted the generation of syngas (H 2 + CO) up to 54.55 wt.%. The gas yields from this experiment have a LHV of 21.97–23.46 MJ/m 3 and total energy of 34.59–171.24 kJ. The high-quality gaseous products can be used as alternative fuels or feed gas for chemical synthesis.","PeriodicalId":13778,"journal":{"name":"International Journal of Applied Science and Engineering","volume":"81 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83985815","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

Environmental sustainability of fly ash and recycled crushed glass blends: an alternative to natural clay for masonry bricks production 粉煤灰和可回收碎玻璃混合物的环境可持续性:用于砖石砖生产的天然粘土的替代品

International Journal of Applied Science and Engineering Pub Date : 2022-01-01 DOI: 10.6703/ijase.202203_19(1).007

引用次数: 2