Journal of medical and bioengineering最新文献_第7页

Hydrodynamic Engineering Approaches for Modeling of the Surface Cell Morphogenesis as Applications of Rosen's Optimality Theory 基于Rosen最优性理论的表面细胞形态发生建模的水动力工程方法

Journal of medical and bioengineering Pub Date : 1900-01-01 DOI: 10.12720/JOMB.2.4.279-289

A. Bolkhovitinov

引用次数: 0

An Enhanced Segmentation Method by Combining Super Resolution and Level Set 一种结合超分辨率和水平集的增强分割方法

Journal of medical and bioengineering Pub Date : 1900-01-01 DOI: 10.12720/JOMB.2.1.1-4

Fe Fasaee, I. Gu, M. Mirhashemi

{"title":"An Enhanced Segmentation Method by Combining Super Resolution and Level Set","authors":"Fe Fasaee, I. Gu, M. Mirhashemi","doi":"10.12720/JOMB.2.1.1-4","DOIUrl":"https://doi.org/10.12720/JOMB.2.1.1-4","url":null,"abstract":"High accuracy in image segmentation is highly demanded in today’s technological world. In this paper combining super resolution image reconstruction with level set image is proposed as a way to improve image segmentation. The term Super resolution, resolution enhancement, is a process to increase the resolution of an image. This improvement quality is due to sub-pixel shift of low resolution (LR) images from each other between images. In fact, each LR image has new information of the image and the main aim of super resolution is to combining these LR images to enhance the image resolution. Following this method, allows users that without any demand for additional hardware, overcoming the limitations of the imaging system. Moreover, the main goal of segmentation is to distinguish an object from background. Segmentation can do that by dividing pixels of an image into prominent image regions. In fact, a specific region is corresponding to individual objects or natural parts of objects. Segmentation can be used in different fields such as image compression and image editing. Vandewalle algorithm and level set segmentation are used in the super resolution and segmentation part respectively. Additionally the regularity of the level set function is conserved via level set regularization term to evade expensive evolving level set function re-initialization. Experiment results for real and magnetic resolution (MR) images indicate the performance of our method. Using level set segmentation technique with super resolution, improves segmentation results in both normal and MR images.","PeriodicalId":437476,"journal":{"name":"Journal of medical and bioengineering","volume":"17 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":"123623707","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

Model of Differentiation between Normal and Abnormal Heart Sounds in Using the Discrete Wavelet Transform 离散小波变换在心音正常与异常识别中的应用

Journal of medical and bioengineering Pub Date : 1900-01-01 DOI: 10.12720/JOMB.3.1.5-11

S. Debbal

{"title":"Model of Differentiation between Normal and Abnormal Heart Sounds in Using the Discrete Wavelet Transform","authors":"S. Debbal","doi":"10.12720/JOMB.3.1.5-11","DOIUrl":"https://doi.org/10.12720/JOMB.3.1.5-11","url":null,"abstract":"Today, modern technology has provided more powerful tools to evaluate the information related to heart sounds that traditional tools like stethoscope cannot achieve. One of the most common methods used for listening and tracking the heart sounds is to record them with special devices. The recorded heart sounds is known as PCG (phonocardiogram) signal. It is a particularly useful diagnosis tool since it contains different timings and relative intensities of heart beat sounds which are directly related to heart activity. The objective of this paper we develop a simple model for analysing the PCG signal in order to distinguish between normal and abnormal heart sounds. This analysis is carried out by using discrete wavelet transform. By using the discrete wavelet transform (DWT) the PCG signal is decomposed in to 7 stages. The average standard deviation of the detailed coefficients at each stage is calculated for each signal. The slopes of these curves for each case are obtained by plotting the average standard deviation of the detailed coefficients at each level detail. The analysis of these slopes shown that the discrimination between the normal signals from abnormal is possible","PeriodicalId":437476,"journal":{"name":"Journal of medical and bioengineering","volume":"27 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":"123930259","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: 7

Application of Biotechnology-Based Method for Ehancing Concrete Properties 基于生物技术的混凝土性能增强方法的应用

Journal of medical and bioengineering Pub Date : 1900-01-01 DOI: 10.12720/JOMB.1.1.36-38

A. Vahabi, K. A. Noghabi, A. Ramezanianpour

引用次数: 5

Homology modeling of human sweet taste receptors: t1r2-t1r3 人类甜味受体同源性建模:t1r2-t1r3

Journal of medical and bioengineering Pub Date : 1900-01-01 DOI: 10.12720/JOMB.3.2.84-86

N. A. Khairudin, R. H. Yousif

{"title":"Homology modeling of human sweet taste receptors: t1r2-t1r3","authors":"N. A. Khairudin, R. H. Yousif","doi":"10.12720/JOMB.3.2.84-86","DOIUrl":"https://doi.org/10.12720/JOMB.3.2.84-86","url":null,"abstract":"The sweet taste perception in human is mainly due to the specific G protein- copulated heterodimeric receptors (GPCR) T1R2-T1R3 and these receptors gathered in the taste buds of the tongue. The sweet protein acts as an important rule for molecular understanding of the taste mechanisms. Therefore, the Homology modeling of the closely related sweet taste receptors (T1R2-T1R3), is crucial to provide an understanding of the interactions between the sweetens and the receptors. 3A21 and 3Q41 were selected as possible templates for T1R2 and T1R3, respectively based on the phylogenetic evaluations. The models of the target sequences were generated using the program MODELLER V9.10. From the Ramachandran plot analysis it was shown that 79% and 84% of the residues reside in the core region for T1R2 model and T1R3 model, respectively.  ABSTRACT The sweet taste perception in human is mainly due to the specific G protein- copulated heterodimeric receptors T1R2-T1R3 and these receptors gathered in the taste buds of the tongue. The sweet protein acts as an important rule for molecular understanding of the taste mechanisms. Therefore, the Homology modeling of the closely related sweet taste receptors (T1R2-T1R3), is crucial to provide an understanding of the interactions between the sweetens and the receptors. 3A21 and 3Q41 were selected as possible templates for T1R2 and T1R3, respectively based on the phylogenetic evaluations. The models of the target sequences were generated using the programm MODELLER V9.10. From the Ramachandran plot analysis it was shown that 79% and 84% of the residues reside in the core region for T1R2 model and T1R3 model, respectively.","PeriodicalId":437476,"journal":{"name":"Journal of medical and bioengineering","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":"128959570","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

Establishment of a Predictive Growth Model for Foodborne Escherichia coli in Fresh-Cut Lettuce 鲜切生菜食源性大肠杆菌生长预测模型的建立

Journal of medical and bioengineering Pub Date : 1900-01-01 DOI: 10.12720/JOMB.2.3.196-200

Huixia Duan, X. Yi, F. Tan, M. Hou, J. Monaghan

引用次数: 0

Segmentation of Lung Vessels Together With Nodules in CT Images Using Morphological Operations and Level Set 基于形态学和水平集的CT肺血管结节分割

Journal of medical and bioengineering Pub Date : 1900-01-01 DOI: 10.12720/JOMB.2.1.5-10

Trang Le

{"title":"Segmentation of Lung Vessels Together With Nodules in CT Images Using Morphological Operations and Level Set","authors":"Trang Le","doi":"10.12720/JOMB.2.1.5-10","DOIUrl":"https://doi.org/10.12720/JOMB.2.1.5-10","url":null,"abstract":"With a fast development of computer tomography (CT) technology, CT images has become one of the most efficient examination methods of lung diseases in clinical. The appearance of vessels and nodules together with their changes over the time in CT images may provide an exact diagnosis. Segmenting blood vessels, extracting nodules together with distinguishing between vessel junctions and nodules have become important clinical challenges. Some factors usually used to distinguish between blood vessels and nodules include the structure, shape, size, color and intensity differences, i.e. bright light or shady. The precision of segmenting lung vessels and nodules plays an important role in analyzing the volumetric growth rate and the nodule status. There are many applications of image processing techniques proposed and used nowadays to give radiologists necessary information in their work such as vessel enhancement, nodule enhancement, vessel and nodule segmentation, etc. With the recognition that intensity is one of the most important factors in classifying strong and weak vessels, solid and nonsolid nodules, this paper presents a way of segmenting vessels together with nodules in CT lung images into three levels of the intensity using morphological operations and level set method. Level-1 indicates the highest intensity or bright light regions, level-3 includes the lowest intensity or shady grayish regions and level-2 is","PeriodicalId":437476,"journal":{"name":"Journal of medical and bioengineering","volume":"4 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":"123337499","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: 7

Effect of Active and Passive Smoking on Heavy Metals Toxic and Antioxidant Trace Elements 主动和被动吸烟对重金属、毒性和抗氧化微量元素的影响

Journal of medical and bioengineering Pub Date : 1900-01-01 DOI: 10.12720/jomb.5.1.58-62

D. Viroonudomphol, L. Suwanton, U. Pinyosirikul, S. Satsue, T. Harnroongroj

{"title":"Effect of Active and Passive Smoking on Heavy Metals Toxic and Antioxidant Trace Elements","authors":"D. Viroonudomphol, L. Suwanton, U. Pinyosirikul, S. Satsue, T. Harnroongroj","doi":"10.12720/jomb.5.1.58-62","DOIUrl":"https://doi.org/10.12720/jomb.5.1.58-62","url":null,"abstract":"Smoking is not only associated with decreased concentrations of several antioxidant vitamins and trace elements but also increased morbidity and mortality risk of diseases. Those due to heavy metal, other toxic and antioxidant trace elements in tobacco smoke are not sufficiently emphasized. Tobacco smoking influences the concentrations of several elements in some organs. We sought to determine the relationship between the known effects of some trace elements and other biochemically important elements (cadium (Cd), chromium (Cr), copper (Cu), mercury (Hg), lead (Pb), selenium (Se) and zinc (Zn)) which are linked with smoking. Cigarette smoking may be a substantial source of intake of these hazardous elements not only to the smokers but also, through passive smoking, to nonsmokers. Studies were carried out on 150 smokers (50 industrial cigarette smokers, 50 passive smokers and 50 local tobacco smokers) compared with 50 nonsmoking controls. Levels of whole blood Pb and Cd were significantly higher in smokers than in controls. Whereas Cr, Se, and Zn levels were significantly lower among smokers than controls. No significant differences of Hg and Cu were found between both groups. For dietary intake assessment, smokers consumed significantly less energy from carbohydrate, fat compared to controls, while energy derived from protein did not differ between groups. Moreover, smokers consumed less dietary fiber and vitamins compared with controls. Increasing whole blood toxic trace elements in healthy smokers may be explained by low antioxidant trace elements and vitamins that lead to develop oxidative stress and diseases and increased turnover or breakdown of vitamins and micronutrients. Therefore public health should not only aim for smoking cessation, but also concern about diet in terms of vitamin and trace element content.","PeriodicalId":437476,"journal":{"name":"Journal of medical and bioengineering","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":"115210364","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: 8

Muscle Synergy of Collegiate Rowers During 6 Min Maximal Rowing on Fixed and Slides Ergometer 大学赛艇运动员在6分钟最大划艇时的肌肉协同作用

Journal of medical and bioengineering Pub Date : 1900-01-01 DOI: 10.12720/jomb.4.4.263-269

S. Shaharudin, S. Agrawal

{"title":"Muscle Synergy of Collegiate Rowers During 6 Min Maximal Rowing on Fixed and Slides Ergometer","authors":"S. Shaharudin, S. Agrawal","doi":"10.12720/jomb.4.4.263-269","DOIUrl":"https://doi.org/10.12720/jomb.4.4.263-269","url":null,"abstract":"The purpose of this study was to evaluate the muscle synergy of collegiate rowers during 6 min maximal rowing on different stretcher mechanisms: fixed (FE) and slides ergometer (SE). The association of muscle synergy to rowing economy and physiological variables was further quantify by statistical analysis. Method: Ten collegiate rowers were recruited at the end of their competitive season. Muscle synergy was extracted from 16 rowing specific muscles using principal component analysis with varimax rotation. 6 min maximal rowing test was performed on Concept 2 FE and SE. Rowing performance and physiological variables were analyzed. Results: Rowers showed similar rowing performance on FE and SE in terms of total distance covered. Rowers rowed faster at shorter strokes when rowing on SE compared than rowing on FE. Greater maximal heart rate, energy expenditure and rowing economy were achieved on SE rowing. Three muscle synergies were extracted in both rowing conditions. Significant association was found between Synergy #1 and rowing economy. Discussion: Muscle synergy was robust between two rowing conditions. Rowing economy was highly associated with muscle synergy. As there was no significant difference in muscle synergy pattern and rowing performance during rowing on FE and SE, both ergometers could be utilized by experienced rowers.","PeriodicalId":437476,"journal":{"name":"Journal of medical and bioengineering","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":"131937735","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: 7

Microwave Sterilization of Oil Palm Fruits: Effect of Power, Temperature and D-value on Oil Quality 油棕果微波灭菌:功率、温度和d值对油品质的影响

Journal of medical and bioengineering Pub Date : 1900-01-01 DOI: 10.12720/JOMB.2.3.153-156

M. Sarah, M. R. Taib

引用次数: 11