Tumu yu Huanjing Gongcheng Xuebao/Journal of Civil and Environmental Engineering最新文献_第9页

Effect of the Operation Mode and Distance on the Electromagnetic Radiation Emitted by Mobile Phone Devices in Greece: A Pilot Study 操作方式和距离对希腊移动电话设备电磁辐射的影响:一项试点研究

Tumu yu Huanjing Gongcheng Xuebao/Journal of Civil and Environmental Engineering Pub Date : 2018-01-01 DOI: 10.4172/2165-784X.1000300

D. Koulougliotis, D. Nikolopoulos, N. Gorgolis, Lefteris Karidas, Ermioni Petraki, P. Yannakopoulos

{"title":"Effect of the Operation Mode and Distance on the Electromagnetic Radiation Emitted by Mobile Phone Devices in Greece: A Pilot Study","authors":"D. Koulougliotis, D. Nikolopoulos, N. Gorgolis, Lefteris Karidas, Ermioni Petraki, P. Yannakopoulos","doi":"10.4172/2165-784X.1000300","DOIUrl":"https://doi.org/10.4172/2165-784X.1000300","url":null,"abstract":"The electromagnetic radiation (EMR) emitted by mobile phone devices (n=52) has been monitored as a function of the operation mode and the distance from the device. Measurements (electric field, V/m) were administered in the metropolitan area of Athens, Greece and involved a total of 52 mobile phone devices operating in the 1.5 GHZ-2.1 GHz frequency range. Five distinct operation modes of the device (“long term inactivity”, “ringing/call effort”, “usage”, “right after the end of the call”, “short term inactivity”) and a total of two distances from the device (0 m and 1 m) were employed. Depending on the intensity of the individual peaks observed in the experimental spectra at 0 m, the mobile devices were shown to cluster into three subgroups as follows: Subgroup 1 (n1=24, peak intensities>1 V/m), Subgroup 2 (n2=9, peak intensities in the range of 0.1 V/m - 1 V/m), Subgroup 3 (n3=19, peak intensities<0.1 V/m). Statistical analysis via repeated-measures analysis of variance (RM-ANOVA) provided evidence for a statistically significant effect of the operation mode on the emitted EMR by the mobile device. The effect was more prominent at the shortest distance (0 m) and for the devices of one specific subgroup (Subgroup 1). The transition between operation modes which shows the largest effect (increase) in the emitted EMR is the one from “long term inactivity” to “Ringing/Call effort” irrespective of device subgroup. Examination of the effect of the distance on the emitted EMR resulted to the following findings: At the longer distance employed (1 m), the devices belonging to Subgroups 2 and 3 continue to exhibit mean EMR intensity similar to the one at 0 m under all operation modes. On the other hand, upon distance increase, the emitted EMR intensity of the devices belonging to Subgroup 1 displays a statistically significant decrease in all operation modes except the one of ‘long term inactivity”.","PeriodicalId":52256,"journal":{"name":"Tumu yu Huanjing Gongcheng Xuebao/Journal of Civil and Environmental Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89449242","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

Water Management in Tarbela Dam By using Bayesian Stochastic Dynamic Programming in Extreme Inflow Season 基于贝叶斯随机动态规划的极端入流季节塔尔贝拉大坝水量管理

Tumu yu Huanjing Gongcheng Xuebao/Journal of Civil and Environmental Engineering Pub Date : 2018-01-01 DOI: 10.4172/2165-784X.1000299

Ayesha Nayab, Muhammad Faisal

引用次数: 1

Prediction of Some Properties of Retempered Concrete in Hot Weather 高温条件下重调混凝土某些性能的预测

Tumu yu Huanjing Gongcheng Xuebao/Journal of Civil and Environmental Engineering Pub Date : 2018-01-01 DOI: 10.4172/2165-784x.1000324

M. H. Rashid, A. Agha

{"title":"Prediction of Some Properties of Retempered Concrete in Hot Weather","authors":"M. H. Rashid, A. Agha","doi":"10.4172/2165-784x.1000324","DOIUrl":"https://doi.org/10.4172/2165-784x.1000324","url":null,"abstract":"This paper present statistical study to proposed empirical equations to predicting some properties of the fresh concrete (additional water for first and second retempering, final slump and dry unit weight), also some properties of the hardened concrete (compressive, flexural, split tensile strength and modulus of elasticity) depending on the simple properties of the retempered concrete mix (water cement ratio, temperature, air content, humidity, mix proportion and unit weight). Theoretical results obtained from these proposed equations found to be in good agreement with the experimental data found in literature. *Corresponding author: Ayad Zeki Saber Agha, Department of Civil Engineering, Erbil Technical Engineering College, Erbil Polytechnic University, Erbil-44002, Iraq, Tel: 009647704454107; E-mail: agha_ayad@epu.edu.krd Received December 02, 2017; Accepted October 18, 2018; Published October 24, 2018 Citation: Rashid MHF, Agha AZS (2018) Prediction of Some Properties of Retempered Concrete in Hot Weather. J Civil Environ Eng 8: 324. doi: 10.4172/2165784X.1000324 Copyright: © 2018 Rashid MHF, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.","PeriodicalId":52256,"journal":{"name":"Tumu yu Huanjing Gongcheng Xuebao/Journal of Civil and Environmental Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73704563","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 Level of Awareness on Traffic Control Devices to Minimize Traffic Accident on Pedestrians in Gondar Town 调查冈达尔镇行人对交通控制装置的认知程度，以减少交通事故

Tumu yu Huanjing Gongcheng Xuebao/Journal of Civil and Environmental Engineering Pub Date : 2018-01-01 DOI: 10.4172/2165-784X.1000326

D. Deme

{"title":"Investigating Level of Awareness on Traffic Control Devices to Minimize Traffic Accident on Pedestrians in Gondar Town","authors":"D. Deme","doi":"10.4172/2165-784X.1000326","DOIUrl":"https://doi.org/10.4172/2165-784X.1000326","url":null,"abstract":"Traffic accident increased intermittently in alarming rate and it was a serious problem throughout the globe particularly in developing countries like Ethiopia. This research concerns on investigate the level of awareness on traffic control devices to minimize traffic accident on pedestrians in Gondar town. To address the objective the study uses twelve (12) questionnaires that distributed for 150 respondents in the town. The study uses simple random sampling mechanism to allocate questionnaires for defined sample size. Basically, the study uses data collected through self administrating questionnaires from randomly selected pedestrians of the town to reveal the final findings. Essentially, descriptive statistical analysis was used to analyze the data. Based on analysis the study revealed that traffic accident on pedestrians was happen due to lack ofawareness about traffic control device, no enough traffic control devices in the town, merely existing traffic control device was not functional, the pedestrians were not loyal to the rule and regulation and etc. were fundamental factors in the town. As a result, traffic accident on pedestrian mostly related to the above findings. In order to overcome the problem the study recommend that government and other stakeholder must create awareness on traffic control devices usage to the population of the town particularly pedestrians. Not only this, drivers must giving priority for pedestrians by avoiding parking and stopping on improper place like side walk, zebra crossingsand etc. In addition to this the government must add the number of traffic control devices and maintenance existing traffic control devices properly to minimize road traffic accidents on pedestrians in the town.","PeriodicalId":52256,"journal":{"name":"Tumu yu Huanjing Gongcheng Xuebao/Journal of Civil and Environmental Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77720982","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

Nanotechnology in Repair and Protection of Structures State-of-the-Art 纳米技术在结构修复和保护中的应用

Tumu yu Huanjing Gongcheng Xuebao/Journal of Civil and Environmental Engineering Pub Date : 2018-01-01 DOI: 10.4172/2165-784X.1000306

Z. Etman, Shreef Abulmagd

引用次数: 10

Traffic Congestion and Impact on the Environment in Vietnam: Development of Public Transport System - Experience from Actual Operation of Bus in Hanoi 越南交通拥堵及其对环境的影响:公共交通系统的发展——来自河内市公共汽车实际运营的经验

Tumu yu Huanjing Gongcheng Xuebao/Journal of Civil and Environmental Engineering Pub Date : 2018-01-01 DOI: 10.4172/2165-784X.1000317

D. T. Nguyen, Y. Kajita

引用次数: 10

Assessment of Air Quality Index for Cities and Major Towns in Tamil Nadu, India 印度泰米尔纳德邦城市和主要城镇空气质量指数评估

Tumu yu Huanjing Gongcheng Xuebao/Journal of Civil and Environmental Engineering Pub Date : 2018-01-01 DOI: 10.4172/2165-784X.1000304

R. Rajamanickam, S. Nagan

{"title":"Assessment of Air Quality Index for Cities and Major Towns in Tamil Nadu, India","authors":"R. Rajamanickam, S. Nagan","doi":"10.4172/2165-784X.1000304","DOIUrl":"https://doi.org/10.4172/2165-784X.1000304","url":null,"abstract":"Air Pollution may be defined as any atmospheric condition in which certain substances are present in such concentrations that they can produce undesirable effects on man and his environment. The Air Quality Index (AQI) is a reporting system and an important tool of risk communication. It informs the public about the level of ambient air quality, and the potential health risk it would impose. AQI converts complex air quality data of various pollutants into a single number (index value), nomenclature and colour. AQI is represented as numeric value varies from 0 to 500. If score is 0, it is the best air quality and if score is 500, it is the worst air quality. There are six AQI categories, namely Good, Satisfactory, Moderate, Poor, Very Poor, and Severe. Each of these categories is decided based on ambient concentration values of air pollutants and their likely health impacts. In Tamil Nadu, under National Ambient Air Quality Monitoring Programme, Ambient Air Quality (AAQ) is being monitored by Central Pollution Control Board in association with Tamil Nadu Pollution Control Board in 28 locations covering cities, major towns and major industrial areas viz. Chennai, Salem, Coimbatore, Madurai, Trichy, Cuddalore, Mettur, and Thoothukudi. The AAQ data from January 2015 to December 2015 for the above cities and towns is collected and AQI is calculated for four months covering four seasons (i.e.,) January (winter), May (summer), July (monsoon), November (post monsoon). Almost all the stations’ AQI fall under good and satisfactory category except Trichy where the majority of the days the AQI fall under moderate category. From the AQI of all the stations, it is observed that responsible pollutant is PM10. The other parameter (i.e.,) SO2 and NO2 fall under good category for all stations for all days. The higher value of PM10 is mainly due to vehicular pollution.","PeriodicalId":52256,"journal":{"name":"Tumu yu Huanjing Gongcheng Xuebao/Journal of Civil and Environmental Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81021361","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

Hydro-mechanical Properties of Highly porous Limestone Rock used for Historic Monuments in North-East Tunisia 突尼斯东北部用于历史遗迹的高多孔石灰岩的水力学特性

Tumu yu Huanjing Gongcheng Xuebao/Journal of Civil and Environmental Engineering Pub Date : 2018-01-01 DOI: 10.4172/2165-784X.1000310

Yousr Koubaa, M. Jamei, H. Guiras

{"title":"Hydro-mechanical Properties of Highly porous Limestone Rock used for Historic Monuments in North-East Tunisia","authors":"Yousr Koubaa, M. Jamei, H. Guiras","doi":"10.4172/2165-784X.1000310","DOIUrl":"https://doi.org/10.4172/2165-784X.1000310","url":null,"abstract":"This paper deals with the study of the physical and hydro-mechanical characteristics of a porous limestone rock. It concerns a historic rock located at \"El-Haouaria artificial caves\" on the seacoast in the Northeast of Tunisia. The rock, object of study in this work, has undergone serious alterations, thus compromising the safety of the monuments. This paper focuses on the mechanical behavior of a sedimentary rock with a variable porosity; covering a wide range varying from 25% to 55%. This study is interested in identifying the mineralogical composition and the microscopic structure of the main rocks constituting the historic monument. Several tests were carried out and they showed that the rock’s mineralogical composition was calcite and quartz. The grain dimensions constituting the rock are variable. Its porosity is inter-granular and connected. This porosity changes over time due to weather conditions. Unconfined compressive tests and tensile tests were carried out on several samples with various porosities and in some cases in various saturation states. The performed tests showed the effect of both porosity and water content (suction) on strength characteristics. However, despite the rock’s dependency on the water content, the role of porosity remains more emphasized. Then, porosity seems to be the main factor affecting resistance properties due to the increase of the porosity and due to its variation as a source of humidity. A ‘’Li and Aubertin’s Model’’ was applied to predict the compression and tensile strength dependency on porosity. It highlighted a strong concordance between experimental and analytical model results. All strength characteristics evolutions with porosity and suction make up essential results obtained in this study. This will provide us with the required input data for modeling in order to predict cave structure degradation and eventually to monitor crack propagation.","PeriodicalId":52256,"journal":{"name":"Tumu yu Huanjing Gongcheng Xuebao/Journal of Civil and Environmental Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86799250","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: 3

Influence of Nonlinearity of Soil-Pile Interface on the Seismic Interaction of Nonlinear Soil-Piles-Bridge System 土-桩界面非线性对非线性土-桩-桥体系地震相互作用的影响

Tumu yu Huanjing Gongcheng Xuebao/Journal of Civil and Environmental Engineering Pub Date : 2018-01-01 DOI: 10.4172/2165-784x.1000321

M. Alfach

{"title":"Influence of Nonlinearity of Soil-Pile Interface on the Seismic Interaction of Nonlinear Soil-Piles-Bridge System","authors":"M. Alfach","doi":"10.4172/2165-784x.1000321","DOIUrl":"https://doi.org/10.4172/2165-784x.1000321","url":null,"abstract":"Post-seismic observations of recent devastating earthquakes have shown that the nonlinear behavior of the soil plays an essential and definitive role in development the damage to the system of soil-pilesstructure during the earthquake. Similarly, slips or collapse the soil-piles interface may cause harmful ruptures. Consequently, an analysis of these problems is necessary to take into account the non-linearity of the soil and the possibility of a slip or collapse at the interface of soil-pile under intensive seismic loading. This study aims to investigate these interaction aspects for soil-piles-structure under real earthquake record using a global approach with a three-dimensional finite difference code – FLAC 3D (Fast Lagrangian analysis of continua in 3 dimensions). The results confirm that the non-linearity of soil and soil-pile interface has a great influence on the response of piles and structure. They show that the consideration of the plasticity of the soil leads to attenuation of efforts, especially for soft loose soils. The simulation carried out in this study illustrate that the use of weak soil-pile interface leads to an increase of bending moment accompanied by a reduction of shear and normal forces in the piles. While, for a medium or high resistance interface, the efforts induced in the piles approaching of those induced in the case of perfect contact.","PeriodicalId":52256,"journal":{"name":"Tumu yu Huanjing Gongcheng Xuebao/Journal of Civil and Environmental Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77790411","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

Endangering Residents in Shipitull Village by Landslide at the Surface Mining in South West Sibovc 西博夫茨西南部露天开采滑坡对Shipitull村居民的危害

Tumu yu Huanjing Gongcheng Xuebao/Journal of Civil and Environmental Engineering Pub Date : 2018-01-01 DOI: 10.4172/2165-784X.1000315

H. Ahmeti, Vehbi Duraku

{"title":"Endangering Residents in Shipitull Village by Landslide at the Surface Mining in South West Sibovc","authors":"H. Ahmeti, Vehbi Duraku","doi":"10.4172/2165-784X.1000315","DOIUrl":"https://doi.org/10.4172/2165-784X.1000315","url":null,"abstract":"Facing the problem of the expropriation of the Shipitull village and the non-advancement of mining activity in the direction of the frontal work for the removal of the clay overburden for the use of coal, geo-mechanical drilling was performed to determine the most accurate physical-mechanical parameters to calculate the height of the partial and generals slopes with the safety factor Fs> 1.2, to create optimum conditions for the use of the detected coal reserves of 15 million tons of coal with the general 18° degree angle with safety factors Fs ≥ 1.27 according to the geotechnical standards. As the basis for calculating the slopes were taken physical-mechanical drilling parameters that were realized in 2015-2017, the tests were performed in the geotechnical laboratory at the INKOS Institute which is licensed to ISO 9001/2015 according to geotechnical standards. Based on the obtained results, statistical processing was performed for the classified parameters (physical) and the mechanical parameters obtained with the triangle test, the direct test and the tensile test. By comparing the physicochemical parameters based on the drilling of 2015 and 2017, there is change of values of angle I0 and cohesion C in the lithological layers due to the presence of moisture. The calculations were carried out with Slide v6 and Geo5 Fine software. Two methods were used during calculation: Circular and Polynomial methods for partial angle of height (h)=30 m and angle (α)=48° with the safety factor Fs<1 and for a general angle of height (h)=55 m with angle (α)=13° with current useable reserves of 6.8 million tons of coal having Safety factor Fs ≥ 1.27.","PeriodicalId":52256,"journal":{"name":"Tumu yu Huanjing Gongcheng Xuebao/Journal of Civil and Environmental Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76459777","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