EPiC Series in Engineering最新文献

Application of blue light led in inactivation of pathogenic fungi on tomato fruit during natural storage 蓝光在番茄果实自然贮藏过程中病原真菌灭活中的应用

EPiC Series in Engineering Pub Date : 1900-01-01 DOI: 10.29007/x1sx

Quoc Dat Nguyen, Hoang Nhut Huynh, Tan-Thi Pham, Trung Nghia Tran

{"title":"Application of blue light led in inactivation of pathogenic fungi on tomato fruit during natural storage","authors":"Quoc Dat Nguyen, Hoang Nhut Huynh, Tan-Thi Pham, Trung Nghia Tran","doi":"10.29007/x1sx","DOIUrl":"https://doi.org/10.29007/x1sx","url":null,"abstract":"Significant losses of fresh horticultural crops occur during postharvest storage due to accelerated senescence and disease. Cooling and chemical preservation procedures are the typical postharvest techniques after harvest. Many researchers have lately used light-emitting diode (LED) therapy for postharvest storage of fruits and vegetables. Tomatoes are known as a superfood because they contain many compounds beneficial to human health. Tomato fruit contains a high proportion of lycopene, which increases as the fruit ripens to the breaker stage. LED systems have evolved as a clean and effective artificial lighting solution for use in horticulture. This research aimed to evaluate the influence of LEDs on postharvest and quality metrics. The impact on quality criteria varied greatly depending on the tomato fruit variety. Studies were conducted on timelines of LED light exposure per day throughout the postharvest fruit stage, which boosted commercial and organoleptic indices and lycopene concentrations. Overall, the results of this study indicated that postharvest exposure of tomato fruits to LED light causes lycopene synthesis, with a concentration of lycopene 41% greater than when subjected to light, dark, and 24% higher than when exposed to other LED lighting settings.","PeriodicalId":242467,"journal":{"name":"EPiC Series in Engineering","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126893762","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

Investigating the effect of low level laser therapy on acne bacteria 探讨低水平激光治疗对痤疮细菌的影响

EPiC Series in Engineering Pub Date : 1900-01-01 DOI: 10.29007/h22k

Hong Duyen Trinh Tran, A. T. Tran, Kieu Thoa Nguyen Thi, Ngoc Bich Ngo, Quoc Bao Pham Ngoc, Khanh Duyen Vo

引用次数: 0

Study on natural ventilation for civil buildings 民用建筑自然通风研究

EPiC Series in Engineering Pub Date : 1900-01-01 DOI: 10.29007/h527

Thanh Phat Ho, K. Tran, T. Nguyen, T. Truong

引用次数: 0

Dynamic Analysis In Functionally Graded Material Plate Using A Meshless Method 基于无网格法的功能梯度材料板动力分析

EPiC Series in Engineering Pub Date : 1900-01-01 DOI: 10.29007/kgcr

Manh Dung Dinh, My Hien Nguyen Thi, Thanh Nha Nguyen

{"title":"Dynamic Analysis In Functionally Graded Material Plate Using A Meshless Method","authors":"Manh Dung Dinh, My Hien Nguyen Thi, Thanh Nha Nguyen","doi":"10.29007/kgcr","DOIUrl":"https://doi.org/10.29007/kgcr","url":null,"abstract":"Functionally graded materials (FGMs) are complicated composites created using the concept of continuous variation of material property in one or more predetermined directions. FGMs have been used in the manufacturing of structural parts that are subjected to non-uniform functioning requirements in recent years. In a thermal protection system, for example, FGMs combine the benefits of traditional ceramics, such as corrosion and heat resistance, with those of metal, such as mechanical strength and rigidity. They are common in engineering practice, so static analysis and dynamic analysis for FGM plate structures are necessary. The radial point interpolation method (RPIM) meshless method has been used based on the point interpolation method (PIM) by including the radial basis function (RPF) in the interpolation formulation and has shown good performance in computational engineering. One of the advantages of this method is that it satisfies the Kronecker’s delta function, which overcomes the limitations of critical boundary conditions for the traditional meshless method. Furthermore, RPIM shape function satisfies the high-order continuity constraint, which the low-order finite element methods (FEM) method does not. This paper presents a meshless approach for the static and dynamic analysis of FGM plates whose material properties vary through the thickness. Numerical examples are solved and the results are compared with reference solutions or the results of FEM given by SOMSOL program to confirm the accuracy of the proposed method.","PeriodicalId":242467,"journal":{"name":"EPiC Series in Engineering","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129892355","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

Study of The Inhomogeneity Between Work Cycles in An Internal Combustion Engine 内燃机工作循环间的不均匀性研究

EPiC Series in Engineering Pub Date : 1900-01-01 DOI: 10.29007/m8cm

Quoc Toan Tran, Ngoc Thanh Huynh

{"title":"Study of The Inhomogeneity Between Work Cycles in An Internal Combustion Engine","authors":"Quoc Toan Tran, Ngoc Thanh Huynh","doi":"10.29007/m8cm","DOIUrl":"https://doi.org/10.29007/m8cm","url":null,"abstract":"Analysis of the main factors causing instability in an internal combustion engine is a fundamental problem in operation research and engine design. The inhomogeneity between work cycles is the cause of the fluctuated power as well as other working parameters of the engine. It is expressed through the amount of fuel supplied to the cycle and the quality of the combustion process. The problem is to find a way to reduce the instability. The creation of devices for instability control based on nonlinear dynamic method is a new direction in studying the essence of inhomogeneity between work cycles. This paper presents experimental results on the instability of the combustion process in an internal combustion engine through the control method of fuel supply time. Studying the orderly structure of the resulting time-series pressure graph will further explain the essence of the inhomogeneity. Based on the results of the investigation of the pressure turbulence in the engine cylinders as well as the inhomogeneity between work cycles determined entirely by random processes, it will be possible to generate a different form of pressure graph using a suitable fuel injection timing device. The selection of signal interval control for injectors is studied and presented in this paper that is the basis for further studies to improve the efficiency of internal combustion engine in each operation mode.","PeriodicalId":242467,"journal":{"name":"EPiC Series in Engineering","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121656806","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

Themo-stress analyis in two-dimensional Functionally Graded Materials by a meshfree Radial Point Interpolation Method 基于无网格径向点插值法的二维功能梯度材料热应力分析

EPiC Series in Engineering Pub Date : 1900-01-01 DOI: 10.29007/jrhd

V. Hoang, My Hien Nguyen Thi, Thanh Nha Nguyen

引用次数: 0

Simulation of Low-Level Laser Light Transmission from The Skin Surface to The Tibia Using The Monte Carlo Method 用蒙特卡罗方法模拟低强度激光从皮肤表面到胫骨的传输

EPiC Series in Engineering Pub Date : 1900-01-01 DOI: 10.29007/gpms

Phuong Anh Dam, Hoang Nhut Huynh, Quang Truong Cao Le, Van Sang Nguyen, A. T. Tran, Trung Nghia Tran

引用次数: 0

Analyzing the spread of the COVID-19 pandemic using the SIR model 利用SIR模型分析COVID-19大流行的传播

EPiC Series in Engineering Pub Date : 1900-01-01 DOI: 10.29007/8sjf

Ngoc Minh Tam Nguyen, Thi My Ngoc Nguyen, Quang Le, Hieu Huy Lam, T. Hoang, Trung Nghia Tran

引用次数: 0

Investigation of light propagation in pork tissue applied in multispectral imaging technique by Monte Carlo simulation method 用蒙特卡罗模拟方法研究多光谱成像技术在猪肉组织中的光传播

EPiC Series in Engineering Pub Date : 1900-01-01 DOI: 10.29007/spmn

Huu Tai Duong, Minh Khoi Nguyen, My Ngoc Nguyen Thi, Minh Chau Ta Ngoc, Anh Xuan Nguyen, A. T. Tran, Quy Tan Ha

引用次数: 0

Calculating and Evaluating Doses of Dental X-Rays CT Cone Beam 牙科x射线CT锥束剂量的计算与评价

EPiC Series in Engineering Pub Date : 1900-01-01 DOI: 10.29007/n51b

Hong Dao Le Thi, Hoang Tung Nguyen, Anh Tu Ly

{"title":"Calculating and Evaluating Doses of Dental X-Rays CT Cone Beam","authors":"Hong Dao Le Thi, Hoang Tung Nguyen, Anh Tu Ly","doi":"10.29007/n51b","DOIUrl":"https://doi.org/10.29007/n51b","url":null,"abstract":"According to recent reports, there is an alarming reality in Vietnam today that about 90% of people have dental problems, mainly tooth decay. Dental diseases cause discomfort for patients and a loss of confidence in communication. Therefore, the demand for dental exams and treatments is increasing day by day.X-rays have long been used to treat dental diseases and are playing an increasingly important role in dentistry. The creation of cone-beam computer tomography (CTCB) has brought many benefits to users. This thesis mainly presents how to calculate the DAP number (Dose Area Product) at CTCB Orthophos and convert the unit of DAP (Gy.cm2) to the unit of the effective dose (mSv).The results obtained from nearly 100 CTCB scans show that the effective dose of the instrument Orthophos is about 0.2 mSv, which is satisfactory for the requirements for radiation safety even with the largest FOV.The study was carried out under the supervision of Denstply Sirona for the purpose of warning before taking, helping doctors (technicians) to manage the problems related to the imaging process and to minimize the radiation dose radiation on the patient, and determine the radiation on the patient in practice at the same time.","PeriodicalId":242467,"journal":{"name":"EPiC Series in Engineering","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130163985","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