AlKhawarizmi Engineering Journal最新文献_第7页

A Comparison between the Post- and Pre-dispersive Near Infrared Spectroscopy in Non-Destructive Brix Prediction Using Artificial Neural Network 近红外光谱前后色散在人工神经网络无损白度预测中的比较

AlKhawarizmi Engineering Journal Pub Date : 2021-10-31 DOI: 10.4186/ej.2021.25.10.39

F. Hong, K. Chia, Xien Yin Yap

引用次数: 0

Microbial Reduction of Bitter Melon (Momordica charantia L.) and Chan Khao (Tarenna hoaensis Pitard) Herb Powder by Dielectric Barrier Discharge Plasma for Food Sanitary 食品卫生用介质阻挡放电等离子体对苦瓜和芫花药粉的微生物还原

AlKhawarizmi Engineering Journal Pub Date : 2021-10-31 DOI: 10.4186/ej.2021.25.10.87

K. Matra, Kiatnarong Narinram, Siwamate Ploysap, P. Prakongsil, J. Promping

引用次数: 0

Numerical Heat Transfer Investigation in a Solar Receiver Heat Exchanger Channel with Punched Elliptical-Winglet Vortex Generators 带冲孔椭圆小波涡发生器的太阳能接收器换热器通道内换热数值研究

AlKhawarizmi Engineering Journal Pub Date : 2021-10-31 DOI: 10.4186/ej.2021.25.10.105

P. Promthaisong, P. Promvonge, C. Khanoknaiyakarn, S. Skullong

引用次数: 2

Innovative use of Rice Husk Biochar for Rice Cultivation in Salt-affected Soils with Alternated Wetting and Drying Irrigation 稻壳生物炭在干湿交替灌溉盐渍土壤上的创新应用

AlKhawarizmi Engineering Journal Pub Date : 2021-09-30 DOI: 10.4186/ej.2021.25.9.19

Sirapat Prasertsuk, Saowanee Wijitkosum

{"title":"Innovative use of Rice Husk Biochar for Rice Cultivation in Salt-affected Soils with Alternated Wetting and Drying Irrigation","authors":"Sirapat Prasertsuk, Saowanee Wijitkosum","doi":"10.4186/ej.2021.25.9.19","DOIUrl":"https://doi.org/10.4186/ej.2021.25.9.19","url":null,"abstract":"Nakhon Ratchasima, Thailand, is the most severely salt-affected area in the country’s Northeast region caused by the underlying geology and human activities. In this condition, evaporation of groundwater with salt to the soil surface is an important issue that affects the use of the area primarily for agricultural purposes. This research aimed to improve saline soil quality using rice husk biochar (RHB) to enable rice cultivation. The experiment was designed to limit the evaporation of salty groundwater by cultivating rice in the cement pond. A mixture of different amounts of RHB with four replicates at 0%, 1%, 1.5%, and 2.0% by weight (wt.%) and 500 g dried cow manure were used for rice cultivation. Jasmine rice variety KDML 105 was planted in cement ponds filled with saline sodic soil at pH 10.6, with a total sodium content of 0.83%, electrical conductivity of 68.6 dS/m, and SAR of 11,707. The results indicated that RHB could significantly reduce the soil salinity, EC, Na+ content, and SAR value while elevating the levels of available macronutrients within just one crop of rice cultivation (120 days). In addition, salt evaporation from groundwater to the soil surface can be limited. The study demonstrated that mixing RHB at 1.5% wt into the saline soil can improve the salted soil and yield the highest rice production. Applying RHB in saline sodic soil for rice cultivated in cement pond is an alternative way for saltaffected areas to reach food security and long-term salted soil revitalization.","PeriodicalId":32885,"journal":{"name":"AlKhawarizmi Engineering Journal","volume":"7 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90304803","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

Coating Gold Nanoparticles Synthesized from Spent Coffee Ground Extract to Enhance Their Stability 用咖啡渣制备金纳米颗粒以增强其稳定性

AlKhawarizmi Engineering Journal Pub Date : 2021-09-30 DOI: 10.4186/ej.2021.25.9.55

Nichayanan Manyuan, P. Danwanichakul

{"title":"Coating Gold Nanoparticles Synthesized from Spent Coffee Ground Extract to Enhance Their Stability","authors":"Nichayanan Manyuan, P. Danwanichakul","doi":"10.4186/ej.2021.25.9.55","DOIUrl":"https://doi.org/10.4186/ej.2021.25.9.55","url":null,"abstract":"Gold nanoparticles (AuNPs) were synthesized using the extract from cold-brew spent coffee grounds. The colloids were characterized by UV-vis spectrophotometry and transmission electron microscopy. When using 1.8 mM and 4.0 mM HAuCl4, the average diameter of AuNPs was 10.51 and 13.75 nm, corresponding to the peak at 533 and 539, respectively. The colloidal stability was studied using the results from spectrophotometry. The aggregation of as-synthesized AuNPs, reflected by the red shift of the spectrum, occurred after the centrifugation at 10000 rpm for 10 minutes but this was prevented after coating with 5%w/v PEG400, 5%w/v PEG6000, 0.1%w/v alginate, and 0.5%w/v SDS solutions. Electrostatic stabilization using alginate and SDS could withstand up to three times of centrifugation, while steric stabilization using PEG400 and PEG6000 could withstand the disturbance of Ca2+ more effectively. The smaller AuNPs were more affected by Ca2+ than the larger ones. In highly acidic solutions, all coated AuNPs showed the red shift and SDS-coated AuNPs were the most effective against acid disturbance, and in highly basic solutions, all coated AuNPs showed the blue shift. Besides, the coated AuNPs were still stable at 52oC. This study could be applied in situations where mechanical, chemical, thermal and acid disturbances are concerned.","PeriodicalId":32885,"journal":{"name":"AlKhawarizmi Engineering Journal","volume":"18 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85358209","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

Mixing-Performance Evaluation of a Multiple Dilution Microfluidic Chip for a Human Serum Dilution Process 用于人血清稀释过程的多重稀释微流控芯片混合性能评价

AlKhawarizmi Engineering Journal Pub Date : 2021-09-30 DOI: 10.4186/ej.2021.25.9.67

Therdthai Thienthong, E. Juntasaro, W. Sripumkhai, Nongluck Houngkamhang, M. Chanasakulniyom, N. Khemthongcharoen, P. Pattamang, N. Atthi, C. Promptmas, P. Uawithya, W. Jeamsaksiri

引用次数: 0

Experiment Investigation and Optimization for Slider Bonding Process to Enhance the Shear Strength of Epoxy Adhesive Joint 提高环氧胶粘接接头抗剪强度的滑块粘接工艺试验研究与优化

AlKhawarizmi Engineering Journal Pub Date : 2021-09-30 DOI: 10.4186/ej.2021.25.9.33

Santi Pumkrachang, K. Asawarungsaengkul, P. Chutima

{"title":"Experiment Investigation and Optimization for Slider Bonding Process to Enhance the Shear Strength of Epoxy Adhesive Joint","authors":"Santi Pumkrachang, K. Asawarungsaengkul, P. Chutima","doi":"10.4186/ej.2021.25.9.33","DOIUrl":"https://doi.org/10.4186/ej.2021.25.9.33","url":null,"abstract":"The shear strength of adhesive bonding between the slider and suspension greatly affects the quality of the hard disk drive. Therefore, this paper intends to determine the optimal slider bonding parameters which can maximize the shear strength of the adhesive joint. The response surface methodology (RSM) and optimization are employed to investigate the effects of five process parameters to the shear strength of the adhesive joint. Next, the central composite design which is a RSM is conducted. The analysis of variance is used to identify the significant terms of the quadratic regression model. Then, the optimization approach is utilized to determine the optimal process parameters with the mean shear strength of 257.62 gf. The confirmation experiment to validate the quadratic model reveals that the prediction error is only 1.6% which is acceptable. Next, the regression model is also used to define the optimal process conditions under the capacity constraint. In this case, the regression model can provide the accurate prediction of the shear strength with 1.14% error. In conclusion, the RSM and optimization approach can effectively yield the optimal process parameters that can enhance the shear strength of the adhesive joint to achieve the appropriate quality level.","PeriodicalId":32885,"journal":{"name":"AlKhawarizmi Engineering Journal","volume":"259 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77874556","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

Pulsed Discharge Plasma in Slug-flow Reactor System for Water Pollutant Removal and Nanoparticle Synthesis 脉冲放电等离子体在段塞流反应器系统中去除水污染物和合成纳米颗粒

AlKhawarizmi Engineering Journal Pub Date : 2021-09-30 DOI: 10.4186/ej.2021.25.9.1

W. Wahyudiono, S. Machmudah, H. Kanda, Yaping Zhao, M. Goto

{"title":"Pulsed Discharge Plasma in Slug-flow Reactor System for Water Pollutant Removal and Nanoparticle Synthesis","authors":"W. Wahyudiono, S. Machmudah, H. Kanda, Yaping Zhao, M. Goto","doi":"10.4186/ej.2021.25.9.1","DOIUrl":"https://doi.org/10.4186/ej.2021.25.9.1","url":null,"abstract":"The water pollutants removal and the metal nanoparticles synthesis were demonstrated by the applying high voltage discharge plasma at room temperature. The experiments were performed in continuous system by the flowing liquid and gas phases simultaneously in a glass capillary tube, where various gas types were employed as a gas phase. The optical emission spectroscopy (OES) equipment identified that the reactive oxidation species were obviously observed at each gas type. The generation rate of them can be enhanced significantly by changing the reactor type from straight to helical form. The water pollutants removal rate has order from oxygen > air > nitrogen > argon > helium. Furthermore, the silver or gold nanoparticles can be synthesized by this plasma reactor system. The transmission electron microscopy (TEM) images indicated that the particle products had spherical morphology with a diameter size smaller than 10 nm. It was deduced that the process presented here is an innovative and applicable in practice, and it can lead to advanced organic compounds degradation and nanoparticles synthesis technology.","PeriodicalId":32885,"journal":{"name":"AlKhawarizmi Engineering Journal","volume":"12 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82942930","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

Facile Fabrication of Chitosan/Starch Composite Films with Fumed Silica as an Additive 以气相二氧化硅为添加剂制备壳聚糖/淀粉复合薄膜

AlKhawarizmi Engineering Journal Pub Date : 2021-09-30 DOI: 10.4186/ej.2021.25.9.45

K. Siralertmukul, Nannalyn Yuenyaw, Supawin Watcharamul, R. Nuisin

{"title":"Facile Fabrication of Chitosan/Starch Composite Films with Fumed Silica as an Additive","authors":"K. Siralertmukul, Nannalyn Yuenyaw, Supawin Watcharamul, R. Nuisin","doi":"10.4186/ej.2021.25.9.45","DOIUrl":"https://doi.org/10.4186/ej.2021.25.9.45","url":null,"abstract":"Chitosan/cassava starch (CS/ST) composite films with different CS:ST (w/w) ratios were prepared by solution casting and investigated as a support for fumed silica (fSiO2) dispersion. The CS, as a 1% (w/v) solution in 1% (w/v) acetic acid, and gelatinized ST, as a 3% (w/v) solution in 1% (w/v) acetic acid, were mixed at the appropriate volume ratios with a homogenizer, and then fSiO2 at 1, 3, or 5% (w/w of CS) was added and cast as films. The morphology, tensile strength, contact angle, X-ray diffraction (XRD) pattern, and surface functional groups of the films were investigated. The external morphology of the CS/ST composite film revealed that the fSiO2 particles were homogeneously dispersed into the polymer matrix. The water absorption and surface hydrophobicity of the composite film increased with increasing ST or CS contents. The hydrophobic acetyl groups of CS caused a notable reduction in the wettability as well as the water adsorption ability, which are preferable for a packaging film application. The CS/ST film with a high fSiO2 content had a higher tensile strength due to the reinforcement effect of the fSiO2 nanoparticles. The XRD patterns of the CS/ST films revealed that the 2 of the crystalline region of CS were slightly changed when including the fSiO2. The shift in the ST diffraction peak was probably due to the change in its chain orientation caused by hydrogen-bonding interactions between CS and ST molecules, resulting in their good adhesion.","PeriodicalId":32885,"journal":{"name":"AlKhawarizmi Engineering Journal","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89091595","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

Practical Method to Evaluate the Effects of the Sensor and the Environment on the Measurement of Lightning-Generated Electric Field Signatures 评估传感器和环境对雷击电场特征测量影响的实用方法

AlKhawarizmi Engineering Journal Pub Date : 2021-08-31 DOI: 10.4186/ej.2021.25.8.137

Albeiro Santa-Acosta, Lina María Morales-Garcia, Herbert Enrique Rojas-Cubides

{"title":"Practical Method to Evaluate the Effects of the Sensor and the Environment on the Measurement of Lightning-Generated Electric Field Signatures","authors":"Albeiro Santa-Acosta, Lina María Morales-Garcia, Herbert Enrique Rojas-Cubides","doi":"10.4186/ej.2021.25.8.137","DOIUrl":"https://doi.org/10.4186/ej.2021.25.8.137","url":null,"abstract":"Indirect lightning measurement, using sensors and remote systems that record the radiated electric fields, is one of the most used methods to study and characterize this type of electrical discharges. This is due to its simplicity of implementation, low cost and the valuable information it provides. However, the measurement of the lightning-generated electric fields (LEF) can be influenced by factors such as the type of sensor, its physical features and its location, as well as by characteristics of the electromagnetic environment like geographical features, the structures that surround the measurement station and the materials of these objects. Under this consideration, this paper proposes a generalized method focused on the identification of those parameters that affect significantly influence the LEF measurement, as well as the process to estimate the correction factor of any measuring system designed for this purpose. This factor is important, as it indicates the proportion in which the signals of interest are attenuated or amplified. The method includes a review about the characteristics of the sensors, their connection scheme and a detailed analysis of the effect of the surrounding structures, taking into account parameters such as the permittivity and electrical conductivity of the materials. Finally, with the aim of presenting quantitative results, the proposed method is validated using as a practical case the information from the LEF automated measuring station owned by the Universidad Distrital Francisco José de Caldas located in Bogotá, Colombia.","PeriodicalId":32885,"journal":{"name":"AlKhawarizmi Engineering Journal","volume":"29 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81339048","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