scholarly journals Smoke Prevention and Exhaust System for Buildings Based on Performance-Oriented Design

2020 ◽  
Vol 15 (6) ◽  
pp. 805-812
Author(s):  
Xiaohua Jin ◽  
Lingbo Zhang ◽  
Jiankun Gong ◽  
Caixia Zhu ◽  
Hang Wan ◽  
...  
Keyword(s):  
Exhaust System ◽  
Space Structure ◽  
Research Trend ◽  
Optimization Strategy ◽  
System Research ◽  
Fire Control ◽  
Factors Affecting ◽  
Water Curtain ◽  
Different Types ◽  
Smoke Prevention

To improve the efficiency of smoke prevention and exhaust (SPE) system for buildings, this paper analyzes the building space structure, SPE design and equipment, fire control strategy, and smoke features of emerging buildings, namely, metro stations, tunnels, atriums, and underground garages, and evaluates the reliability of water curtain system in SPE design. By analyzing the factors affecting the SPE efficiency of buildings, the authors measured the effect of building SPE plan and evacuation situation, and summarized the keys and technical difficulties in the SPE system research of different types of buildings. Considering building features and SPE optimization strategy, it is recommended to apply water curtain system as fire partitions in metro stations and underground garages. The proposed optimization strategy, coupled with the original SPE system for buildings, marks the research trend of SPE system for emerging buildings in future.

scholarly journals Effect of Short Fiber Reinforcements on Fracture Performance of Cement-Based Materials: A Systematic Review Approach

Materials ◽  
2021 ◽  
Vol 14 (7) ◽  
pp. 1745
Author(s):  
Waqas Ahmad ◽  
Mehran Khan ◽  
Piotr Smarzewski
Keyword(s):  
Graphical Representation ◽  
Safety Evaluation ◽  
Short Fiber ◽  
Research Trend ◽  
Scientometric Analysis ◽  
Fiber Reinforced ◽  
Factors Affecting ◽  
Fracture Properties ◽  
Cement Based Materials ◽  
Relevant Publication

Fracture characteristics were used to effectively evaluate the performance of fiber-reinforced cementitious composites. The fracture parameters provided the basis for crack stability analysis, service performance, safety evaluation, and protection. Much research has been carried out in the proposed study field over the previous two decades. Therefore, it was required to analyze the research trend from the available bibliometric data. In this study, the scientometric analysis and science mapping techniques were performed along with a comprehensive discussion to identify the relevant publication field, highly used keywords, most active authors, most cited articles, and regions with largest impact on the field of fracture properties of cement-based materials (CBMs). Furthermore, the characteristic of various fibers such as steel, polymeric, inorganic, and carbon fibers are discussed, and the factors affecting the fracture properties of fiber-reinforced CBMs (FRCBMs) are reviewed. In addition, future gaps are identified. The graphical representation based on the scientometric review could be helpful for research scholars from different countries in developing research cooperation, creating joint ventures, and exchanging innovative technologies and ideas.

Deceleration of sliding motorcycles (mainly scooters) in accident reconstructions

2017 ◽  
Vol 232 (7) ◽  
pp. 866-876 ◽  
Author(s):  
Carlo Cialdai ◽  
Dario Vangi ◽  
Antonio Virga
Keyword(s):  
Urban Areas ◽  
Test Session ◽  
Road Accidents ◽  
Factors Affecting ◽  
Different Types ◽  
Energy Dissipated ◽  
Comparison Of The Results ◽  
Two Wheeler ◽  
The Impact ◽  
Good Agreement

This paper presents an analysis of the situation in which a two-wheeler (i.e. a motorcycle, where the term motorcycles includes scooters) falls over to the side and then successively slides; this typically occurs in road accidents involving this type of vehicle. Knowing the deceleration rate of the sliding phase allows the kinetic energy dissipated and the speed of the motorcycle just before the fall to the ground to be calculated. These parameters are very important in the analysis and reconstruction of accidents. The work presented in this paper was developed in two experimental test sessions on fully faired motorcycles which are mainly of the scooter type and widely used in urban areas. In the first session, sliding tests were carried out, with the speed in the range 10–50 km/h, on three different types of road surface. Analysis of the evidence allowed the dissipative main phases of motion of the motorcycle (the impact with the ground, the rebounds and the stabilized swiping) to be identified and some factors affecting the phenomenon to be studied. The coefficient of average deceleration was calculated using two typical equations. The second test session consisted of drag tests. In these tests, the motorcycle, which had previously laid on its side, was dragged for a few metres at a constant speed of about 20 km/h, while the drag force was measured. A comparison of the results obtained in these tests with those obtained in the sliding tests yielded very good agreement in the coefficients of deceleration.

Treating Afro hair loss: signs, symptoms and specialist interest

2021 ◽  
Vol 10 (5) ◽  
pp. 190-197
Author(s):  
Ingrid Wilson
Keyword(s):  
Black Women ◽  
Hair Loss ◽  
Factors Affecting ◽  
Different Types ◽  
Recent Developments ◽  
Hair Care ◽  
Care Practices ◽  
The Aesthetic ◽  
The Impact ◽  
Symptoms And Signs

This article explores the different types of hair loss that black women may experience more than other groups of patients. Properties of African hair and the impact of hair care practices are discussed, as well as factors affecting the presentation of other hair loss conditions. It is important for the aesthetic practitioner to be able to distinguish between the temporary forms of hair loss that they can help to treat and the permanent or scarring forms of hair loss, which need a prompt referral to a dermatologist with a specialist interest in hair. Prompt recognition and referral can help to delay the progression of hair loss. The symptoms and signs that patients and practitioners should be alerted to are explored, as well as the treatments that can help and where referrals may be necessary. Recent developments and gaps in knowledge are summarised.

scholarly journals Mutual fund investors perception in India-a study

2017 ◽  
Vol 7 (1.1) ◽  
pp. 60
Author(s):  
R. Udhayasankar ◽  
K. Maran
Keyword(s):  
Mutual Funds ◽  
Mutual Fund ◽  
Financial Risk ◽  
Fund Raising ◽  
Factors Affecting ◽  
Derivative Instruments ◽  
Different Types ◽  
Small Investors ◽  
Investment Option ◽  
Short Span

Mutual fund is four decades old in India.  It was started by UTI during the year 1964 with few schemes for small investors. During this short span of time it has made tremendous growth in Indian small investors. But now a day’s its volume of investors and sources of investment also growing tremendous level. Moreover mutual fund scheme have added new dimension to overcome financial risk of small investors and also in fund raising capacity of corporate sectors. Mutual fund investors can diversify even more by purchasing different kind of stocks which will helps to spreading out investors’ money across different types of derivative instruments and hence it reduces the risk tremendously up to certain extent and it is automatically diversify in a predetermined category of investments. This serves bridge work between small investors and corporate sectors likewise considering those points in this paper is an attempt to know the investors’ perceptions towards selected mutual funds. This paper makes an attempt to identify various factors affecting perception of investors regarding investment in mutual funds. The findings will helpful to identify the investors’ interest base and factors clearly and it reveals that the investors consider mutual funds as flexible investment option and it creates interest of investment among small investors.

scholarly journals Early-Age Cracking in Concrete: Causes, Consequences, Remedial Measures, and Recommendations

2018 ◽  
Vol 8 (10) ◽  
pp. 1730 ◽  
Author(s):  
Md. Safiuddin ◽  
A. Kaish ◽  
Chin-Ong Woon ◽  
Sudharshan Raman
Keyword(s):  
Service Life ◽  
Concrete Structures ◽  
Real Life ◽  
Early Age ◽  
Structural Elements ◽  
Remedial Measures ◽  
Curing Conditions ◽  
Factors Affecting ◽  
Different Types ◽  
Service Conditions

Cracking is a common problem in concrete structures in real-life service conditions. In fact, crack-free concrete structures are very rare to find in real world. Concrete can undergo early-age cracking depending on the mix composition, exposure environment, hydration rate, and curing conditions. Understanding the causes and consequences of cracking thoroughly is essential for selecting proper measures to resolve the early-age cracking problem in concrete. This paper will help to identify the major causes and consequences of the early-age cracking in concrete. Also, this paper will be useful to adopt effective remedial measures for reducing or eliminating the early-age cracking problem in concrete. Different types of early-age crack, the factors affecting the initiation and growth of early-age cracks, the causes of early-age cracking, and the modeling of early-age cracking are discussed in this paper. A number of examples for various early-age cracking problems of concrete found in different structural elements are also shown. Above all, some recommendations are given for minimizing the early-age cracking in concrete. It is hoped that the information conveyed in this paper will be beneficial to improve the service life of concrete structures. Concrete researchers and practitioners may benefit from the contents of this paper.

scholarly journals A Contribution to the Study of Factors affecting the Quality and Composition of Potatoes

1905 ◽  
Vol 1 (3) ◽  
pp. 347-357 ◽  
Author(s):  
S. F. Ashby
Keyword(s):  
Sandy Soils ◽  
Factors Affecting ◽  
Different Types

The work was undertaken with the hope of establishing some connexion between the characters of soils as shown by chemical and mechanical analyses, and the quality and composition of the potatoes grown on them. As regards quality, most attention has been given to the occurrence of ‘blackening’ after cooking, especially after a second warming up, and an attempt has been made to get at the cause of this phenomenon. This defect has been often complained of by potato growers and dealers, and seriously affects the price of samples marketed for consumption in towns where the largest buyers are hotels and restaurants which demand a potato capable of keeping its colour after a second steaming. ‘Blackening’ is often associated with sandy soils heavily manured with farmyard dung or town manure, and it has been observed in tubers grown with spring dressings of kainite; concordant opinions, however, are not to be had from practical men, and in fact the defect may arise on the most widely different types of soil. In order to exclude disturbances due to variety, ‘Up to Date,’ as one of the most widely grown sorts, has alone been investigated.

scholarly journals Transport of engineered nanoparticles in soils and aquifers

2019 ◽  
Vol 27 (1) ◽  
pp. 43-70 ◽  
Author(s):  
Mahmood Fazeli Sangani ◽  
Gary Owens ◽  
Amir Fotovat
Keyword(s):  
Experimental Studies ◽  
Engineered Nanoparticles ◽  
Background Solution ◽  
Contributing Factors ◽  
Factors Affecting ◽  
Soil Systems ◽  
Aquifer Systems ◽  
Different Types ◽  
Transport Behaviour ◽  
The Media

Transport and deposition behaviour of engineered nanoparticles (ENPs) in natural aquifers and soil systems is a key determinant of the fate of these materials in environmental systems. A growing number of experimental studies are being conducted worldwide to address transport and deposition of ENPs in porous media (PM). Here we comprehensively review the main mechanisms and factors affecting the mobility of the environmentally important ENPs in natural PM. A variety of different processes including those that promote mobility and result in elution from the PM and those that hinder their mobility and promote ENP retention can influence ENP’s mobility through soil and aquifer media. The most important contributing factors regarding ENP transport in PM include: the physicochemical properties of the ENP, the media, the hydrodynamics of the system, and the background solution characteristics. Results from several studies conducted on the most common and environmentally important ENPs have shown that under natural environmental conditions, different types of ENPs show different transport behaviour in soil and aquifer systems. Additionally, the importance of media matrix and mobile solution factors in governing mobility of ENPs varies from one type of ENP to another.

An Automated Optimize Utilization of Water and Crop Monitoring in Agriculture Using IoT

2021 ◽  
pp. 37-45
Author(s):  
Ajith Krishna R ◽  
◽  
◽  
◽  
Ankit Kumar ◽  
...  
Keyword(s):  
Soil Analysis ◽  
Sensor Nodes ◽  
Wireless Sensor ◽  
Leaf Wetness ◽  
Productivity Analysis ◽  
Factors Affecting ◽  
Crop Monitoring ◽  
Different Types ◽  
Smart Agriculture ◽  
Climate Analysis

Agriculture is the primary occupation in our country for ages. But now due to migration of people from rural to urban there is hindrance in agriculture. So, to overcome this problem we go for smart agriculture techniques using IoT. This paper includes various features like GPS based remote controlled monitoring, moisture & temperature sensing, intruders scaring, security, leaf wetness and proper irrigation facilities. It makes use of wireless sensor networks for noting the soil properties and environmental factors continuously. Various sensor nodes are deployed at different locations in the farm. Controlling these parameters are through any remote device or internet services and the operations are performed by interfacing sensors, Wi-Fi, camera with microcontroller. This concept is created as a product and given to the farmer’s welfare. AI Solution for Farmers perform soil analysis, climate analysis, and productivity analysis using linear regression. It helps farmers to understand about the crop to be sown as well as the factors affecting their productivity with the help of different types of graphs and tables. Farmers need not to do anything on the application as it is highly interactive as by using speech API.

scholarly journals Structural Vibration Tests: Use of Artificial Neural Networks for Live Prediction of Structural Stress

2020 ◽  
Vol 10 (23) ◽  
pp. 8542
Author(s):  
Laura Wilmes ◽  
Raymond Olympio ◽  
Kristin M. de Payrebrune ◽  
Markus Schatz
Keyword(s):  
Neural Networks ◽  
Artificial Neural Networks ◽  
Space Structure ◽  
Structural Vibration ◽  
Future Application ◽  
Different Types ◽  
Novel Method ◽  
Artificial Neural ◽  
Input Load ◽  
Vibration Tests

One of the ongoing tasks in space structure testing is the vibration test, in which a given structure is mounted onto a shaker and excited by a certain input load on a given frequency range, in order to reproduce the rigor of launch. These vibration tests need to be conducted in order to ensure that the devised structure meets the expected loads of its future application. However, the structure must not be overtested to avoid any risk of damage. For this, the system’s response to the testing loads, i.e., stresses and forces in the structure, must be monitored and predicted live during the test. In order to solve the issues associated with existing methods of live monitoring of the structure’s response, this paper investigated the use of artificial neural networks (ANNs) to predict the system’s responses during the test. Hence, a framework was developed with different use cases to compare various kinds of artificial neural networks and eventually identify the most promising one. Thus, the conducted research accounts for a novel method for live prediction of stresses, allowing failure to be evaluated for different types of material via yield criteria.

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