Advances in Mechanics

This study aimed to evaluate the preventive role of vitamin C by decreasing the effect of oxidative stress of the radiation emitted from mobile phone on the tissue of pregnant mice t but some organs showed pathological changes, some of these change occurred within brain involving: thickening increase within the granular layer of Vascular congestion, neural cellular evaculation, assembly of microglia cells(C+2 hours)&necrosis of internal &external granular layers(C+3 hours). Liver: central vein congestion, sinusoidal congestion, un-arranged central cells, degenerative vaculation hepatocyte, hepatocellular necrosis (C+2 hour).

Aljuboury Maha Kh admin

Abdulfattah

Janan H

Lixue jinzhan

The preventive role of Vit C in decreasing oxidative stress of microwaves emitted from mobile phone on some tissue of mice embryos

维生素C在减少手机发射的微波对小鼠胚胎某些组织的氧化应激中的预防作用

In this theoretical study, a set of mathematical calculations were performed to evaluate the cold plate performance that operates on basis of the heat exchange. Heat transfer is done by two processes were forced convection of water flowing through the cooling plate channels, and by free convection from the side of the plate that exposed to the ambient air. The cold plate model is designed by using different number of circular canal from 1 to 6 with the same diameter is 9 mm. Then, the channels were drilled precisely between two sides of the cold plate with dimensions of 109 × 109 × 25 mm to determine the optimum number of channels that gave the highest system efficiency. The operating work of the cooling system has been achieved by using different parameters of working fluid such as the inlet temperature range from 26 °C to 45 °C, and enter velocity from 0.1 m/s to 1 m/s. The analytical results showed the rising in both of the heat transfer coefficient and the Nusselt number  with the increasing in the liquid velocity for all channels, which is consistent with previous theoretical and practical studies. It was noted from the obtained analytical results the six pass of channels was better and high efficiency than the rest of the channels. The reason was due to increasing the exposing surface area of the cold plate to the surrounding that led to absorption more thermal energy. In addition, the results showed less variation of h and Nu between the five and six channels about 6 % approximately at Tw,in= 25 °C and Vw,in=0.5 m/s. Consequently, the cold plate five canals are selection in this manuscript because of it gave high thermal performance and the second reason is the dimensions boundary of the system design.

Thamer Khalif Salem

Mohammed Yaseen Lafta

Raaid Rashad Jassem Al Doury

A Theoretical Study to Improve the Performance Design of the Cryogenic Plate by Using Different Number of Water Passages

通过采用不同数量水道改善低温板性能设计的理论研究

Li-Fi stands for Light Fidelity. The technology is new and improved the speed of transmission data. Li-Fi is a wireless optical networking technology that uses visible light as a medium for the transmission of data to deliver high-speed communication in a manner similar to a Wi-Fi communication system. This paper presents a new algorithm for an optical laser diode (LD) positioning system based on ray tracing of first-order reflection position. The indoor visible light communication (VLC) communication channel has used 5-laser diodes (LDs), each one consists of 5×5 LD chips. The multipath propagation model and SNR evaluation have presented in this paper. The simulation results of the conventional VLC systems have achieved by using MATLAB software.

Hala Kadhem Mohammed

Faris Mohammed Ali

Nasir Hussein Selman

Study and Evaluation of Different Link Configurations of Laser Diodes positioning for Line of Sight and Non-Line of Sight Ray Tracing

激光二极管定位的不同链路配置的研究与评估：视线与非视线光线追踪

Market development/revitalization must be carried out by regulating and improving the quality of market effectiveness so that the trade facility management program in Banda Aceh City, Indonesia can continue regardless of existing regulations or provisions. This study aims to analyze the policy of the Banda Aceh City Government towards feasibility studies, supporting facilities, and market building infrastructure. The research method uses descriptive qualitative and quantitative methods. Data collection techniques through mixed/combined methods in the form of interviews, questionnaires, field observations, individual surveys and related government agencies. Samples were carried out on the service, traders and users/consumers who were in the research location totaling 237 respondents. The results showed that based on buyer respondents' data, there were 4 research factors that could be maintained and were able to explain 59.27% ​​of the total variance. Based on the data of merchant respondents, there are 3 research factors that can be maintained and are able to explain 61.82% of the total variance.

Syakban Noor

Sugiarto

Cut Zukhrina Oktaviani

Factors Analysis of Effectiveness of Market Building Building in Banda Aceh City

班达亚齐市市场建设有效性因素分析

This article investigates how to improve the performance of concrete by using rubber from used tyres, resulting in environmentally friendly concrete with reduced risk. The study of rubber effects on some physical and mechanical properties of concrete. Rubber was used to replace fine or coarse aggregates. The findings of fine and coarse aggregates were then compared to determine the best substitution. The thermal insulation and mechanical strength of lightweight concrete are investigated as the primary requirements. The use of waste tyres in concrete can lead to massive environmental and sustainability benefits. Rubber concrete can deform but not split when chipped rubber aggregate is used. Crumbed use has a higher isolation performance than other sizes due to its better void filling ability. Furthermore, replacing fine aggregates reduces conductivity even further, which was 32.76% less than the control mix. Also, the density decreased by 6% when using chipped rubber at 25% replacement, compared to the control mix , the reduction in density and thermal conductivity is a good advantage for many applications. The workability recorded the highest decrease of 42%, the compressive 48.75%, the flexural 15.78%, and the splitting was 24.50%, replacing 25%. The microstructure images showed a lack of bonding between the rubber and the cement matrix.

Abdul Rahman Kamel

Ahmed Hussein

Nahidh Mahmood

Mohammed M. Kadhum

ICT, AI, IOTs and technology applications in education - A case with accelerometer and internet learner gender prediction

信息通信技术、人工智能、物联网与教育技术应用——以加速度计和互联网学习者性别预测为例

Digital Elevation Models (DEM) are numerical data structures that represent the spatial distribution of elevation, providing quantitative and continuous information for the visualization of variables. On the other hand, Augmented Reality is a system that involves the user and complements the visualization of the real world through virtual elements. Linking Augmented Reality with Digital Elevation Models generates a great contribution for the visualization, interaction and understanding of phenomena. This article proposes a methodology that allows linking Digital Elevation Models with Augmented Reality environments, in such a way that it provides a positive impact on the ability to interpret the relief, satellite images, and even allow mobile applications development.

Juan Manuel Suárez Rodríguez

Alexandra Abuchar Porras

GEOAR, INTEGRATION OF DIGITAL ELEVATION MODELS IN AUGMENTED REALITY ENVIRONMENTS

GEOAR，在增强现实环境中集成数字高程模型

Archaeological buildings are part of the ancestral legacy of a nation, have historical importance, and generate economic income due to tourism activity. One of the most representative archaeological parks of Peru is the Archaeological Park of Saqsaywaman - Puka Pukara Complex, it is located in the department of Cusco, about 7 km from the city of Cusco. The main objective of this research is to know the mechanical properties of the stone masonry building, to obtain data that can be used for its structural evaluation. For this purpose, physicochemical tests were carried out to obtain the density, porosity, and absorption in the stone masonry from the original materials of this structure. Additionally, information on the geometry of the building was collected through photogrammetry techniques using Agisotf Metashape software. Next, the enclosure and type of rock were identified, as well as compression tests under controlled load following the indications of ASTM D3148-D2938 ISRM standard. As a result of the mechanical properties of the limestone rock understudy, the average of the corrected resistance of the 3 samples was determined, obtaining a value of 264.533 kg/cm2, which determines a rock of moderate to good quality. The physical properties of the rock samples showed that the porosity of the limestone rock was 5.186 %, its density was 2.50 kg/cm3 and its absorption was 2.074 %. The results show a compressive strength of 264.533 kg/cm2, a density of 2.50 kg/cm3, absorption of 2.074 %, and porosity of 5.186 %. Concerning the structural geometry obtained, it is concluded that the geometric model corresponds to a high symmetrical irregular shape and that the complex is deteriorated due to natural seismic factors.

Rolando Mamani-Huaman

Hernan Chavez Rojas

Characterization of the mechanical properties and obtaining the structural geometry of an Inca stone masonry building

印加石砌建筑的力学性能表征与结构几何形状获取

The waste natural such as rice husk, pistachio shells , eggshell, ziziphus spina-christi bark , etc., are locally available. Wholly these waste natural has excellent mechanical properties and can be used more professionally in improve of composite materials for different usages. This paper shows the study of the tensile test, impact test  and  flexural test properties of the ziziphus spina-christi bark particles strengthened epoxy resin. ziziphus spina-christi bark particles with different weight fraction  (3%, 5%, and7% and 9%) strengthened epoxy resin has been formed by hand lay-up method. In this contains studying the effects of weight fraction (1, 3, 5,7 & 9 %) and the kind of the reinforcement particulates on the properties of the composite materials.From results the mechanical properties of epoxy imroved when adding particles of spin-chiristi bark especially the addition of 7%wt.

ISSN	1000-0992
h-index	25

Publication Information	Publisher: li xue jin zhan bian ji bu，Publishing cycle: ，Journal Type: journal，Open Access Journals: No
Basic data	Year of publication: 2013，Proportion of original research papers: 0.00%，Self Citation Rate:N.A.， Gold OA Rate: 0.00%

Advances in Mechanics

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The preventive role of Vit C in decreasing oxidative stress of microwaves emitted from mobile phone on some tissue of mice embryos

A Theoretical Study to Improve the Performance Design of the Cryogenic Plate by Using Different Number of Water Passages

Study and Evaluation of Different Link Configurations of Laser Diodes positioning for Line of Sight and Non-Line of Sight Ray Tracing

Factors Analysis of Effectiveness of Market Building Building in Banda Aceh City

ICT, AI, IOTs and technology applications in education - A case with accelerometer and internet learner gender prediction

GEOAR, INTEGRATION OF DIGITAL ELEVATION MODELS IN AUGMENTED REALITY ENVIRONMENTS

Characterization of the mechanical properties and obtaining the structural geometry of an Inca stone masonry building

Enhancement Mechanical Properties of Epoxy by ziziphus spina-christi bark

GEOAR, INTEGRATION OF DIGITAL ELEVATION MODELS IN AUGMENTED REALITY ENVIRONMENTS

Characterization of the mechanical properties and obtaining the structural geometry of an Inca stone masonry building