Integrated Fracture Delineation in Volcanics, Junggar Basin, China

2014 ◽  
Vol 1073-1076 ◽  
pp. 2019-2024
Author(s):  
Fang Fang Wu ◽  
Jin Chuan Zhang ◽  
Hao Zhang ◽  
Jin Long Wu
Keyword(s):  
Junggar Basin ◽  
Dispersion Analysis ◽  
Key Factors ◽  
Vertical Wells ◽  
Surface Shear ◽  
Acoustic Reflection ◽  
Multi Scale ◽  
Set Up ◽  
Resistivity Image ◽  
Borehole Surface

Fracture effectiveness, extension and connectivity from borehole surface into deep formation are the key factors to control producibility of volcanic formations. A systematic and integrated fracture delineation approach was set up which integrated available measurements with multi-scale depth of investigation to cover borehole surface, near wellbore and deep formation. High resolution micro-resistivity image was used to identify fractures on the borehole surface; shear anisotropy enhanced by dispersion analysis was used to evaluate fractures away from the borehole; Borehole acoustic reflection survey technique was applied in vertical wells to assess probable fracture networks deep into formation up to maximal 10 meters. This multi-scale approach had been implemented in multiple wells drilled in volcanic formations in Junggar basin, which helped a lot on fracture evaluation and productivity estimation.

scholarly journals Group and Shuffle Convolutional Neural Networks with Pyramid Pooling Module for Automated Pterygium Segmentation

Diagnostics ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 1104
Author(s):  
Siti Raihanah Abdani ◽  
Mohd Asyraf Zulkifley ◽  
Nuraisyah Hani Zulkifley
Keyword(s):  
Screening Tool ◽  
Jaccard Index ◽  
Dense Network ◽  
Multi Scale ◽  
Spatial Pyramid Pooling ◽  
Severity Levels ◽  
Set Up ◽  
Channel Variation ◽  
Mobile Phone Camera ◽  
Sunlight Radiation

Pterygium is an eye condition that is prevalent among workers that are frequently exposed to sunlight radiation. However, most of them are not aware of this condition, which motivates many volunteers to set up health awareness booths to give them free health screening. As a result, a screening tool that can be operated on various platforms is needed to support the automated pterygium assessment. One of the crucial functions of this assessment is to extract the infected regions, which directly correlates with the severity levels. Hence, Group-PPM-Net is proposed by integrating a spatial pyramid pooling module (PPM) and group convolution to the deep learning segmentation network. The system uses a standard mobile phone camera input, which is then fed to a modified encoder-decoder convolutional neural network, inspired by a Fully Convolutional Dense Network that consists of a total of 11 dense blocks. A PPM is integrated into the network because of its multi-scale capability, which is useful for multi-scale tissue extraction. The shape of the tissues remains relatively constant, but the size will differ according to the severity levels. Moreover, group and shuffle convolution modules are also integrated at the decoder side of Group-PPM-Net by placing them at the starting layer of each dense block. The addition of these modules allows better correlation among the filters in each group, while the shuffle process increases channel variation that the filters can learn from. The results show that the proposed method obtains mean accuracy, mean intersection over union, Hausdorff distance, and Jaccard index performances of 0.9330, 0.8640, 11.5474, and 0.7966, respectively.

Mechanical Power Losses of Ball Bearings: Model and Experimental Validation

2021 ◽  
pp. 1-29
Author(s):  
Ahmet Dindar ◽  
Amit Chimanpure ◽  
Ahmet Kahraman
Keyword(s):  
Dynamic Model ◽  
Point Contact ◽  
Elastohydrodynamic Lubrication ◽  
Mechanical Power ◽  
Ball Bearings ◽  
Power Losses ◽  
Euler Parameters ◽  
Surface Shear ◽  
Axial Forces ◽  
Set Up

Abstract A tribo-dynamic model of ball bearings is proposed to predict their load-dependent (mechanical) power losses. The model combines (i) a transient, point contact mixed elastohydrodynamic lubrication (EHL) formulation to simulate the mechanics of the load carrying lubricated ball-race interfaces, and (ii) a singularity-free dynamics model, and establishes the two-way coupling between them that dictates power losses. The dynamic model employs a vectoral formulation with Euler parameters. The EHL model is capable of capturing two-dimensional contact kinematics, velocity variations across the contact as well as asperity interactions of rough contact surfaces. Resultant contact surface shear distributions are processed to predict mechanical power losses of example ball bearings operating under combined radial and axial forces. An experimental set-up is introduced for measurement of the power losses of rolling-element bearings. Sets of measurements taken by using the same example ball bearings are compared to those predicted by the model to assess its accuracy in predicting mechanical power loss of a ball bearing within wide ranges of axial and radial forces.

scholarly journals FACTORS DETERMINING SUCCESSFUL NEUROBIOFEEDBACK IN ATHLETES

2019 ◽  
Vol 12 (2) ◽  
pp. 80-88
Author(s):  
L P Cherapkina
Keyword(s):  
Performance Enhancement ◽  
International System ◽  
Dispersion Analysis ◽  
Sports Performance ◽  
Optimal Functioning ◽  
Bipolar Mode ◽  
And Gender ◽  
Set Up ◽  
Previous Session ◽  
Written Informed Consent

Alpha-stimulating neurobiofeedback is actively introduced into sports training. Successful training contributes to optimal functioning and sports performance enhancement. However, not all athletes are able to achieve their goals. The main problem is the absence of the data explaining the effect of sports qualification, specialization, and gender on successful neurobiofeedback. Aim. The article deals with establishing the correlation between sports qualification, specialization (depending on movement character), gender, and successful neurobiofeedback. Materials and methods. 216 athletes (124 males and 92 females) participated in a 15-day neurobiofeedback course with the Boslab-alpha equipment (Russia). The average age of participants is 19 ± 0.1 years. All participants have 5 or more years of sports experience. All athletes provided their written informed consent for participation in the study. The 25–30-minute sessions of neurobiofeedback were conducted once per day. The electrodes were set up in the frontal and parietal area in a bipolar mode according to the 10–20 international system (F1 and P3). The increase in the spectrum power of alpha range by no less than 10 % compared to the previous session was considered as successful neurobiofeedback. We calculated the percentage of successful and unsuccessful training sessions for each participant. Statistical analysis of the data obtained was performed with the help of SPSS 13.0 software. Results. The study of successful training in athletes divided into groups in terms of gender, sports qualification, and sports specialization did not reveal any statistically significant differences. By using multifactor dispersion analysis, it was established that successful neurobiofeedback in athletes depended on all the abovementioned factors (F = 2.780; P < 0.05). Conclusion. Successful neurobiofeedback in athletes is determined by the combination of three factors (gender, sports specialization, sports qualification), which do not possess significant effect when studied separately.

Overcoming Intersectional Barriers

2018 ◽  
pp. 971-993
Author(s):  
Sara L. Parker ◽  
Kay Standing
Keyword(s):  
Life Experiences ◽  
Future Research ◽  
Key Factors ◽  
Policy Makers ◽  
Key Factor ◽  
Women's Lives ◽  
Just Society ◽  
Set Up ◽  
The Impact ◽  
Research And Policy

This chapter discusses the complexity and challenges of exploring the impact of gender on women's ability to realise their potential in Nepal. It demonstrates the limitations of using binary divisions to exploring ‘gender' as a key factor that impacts upon women's lives. By analysing interviews with ‘inspirational' women in Nepal conducted between 2009 and 2012 the chapter highlights the importance of exploring intersectional factors that also influenced women's life experiences. Based on interviews with 34 ‘inspirational' women in Nepal the chapter explores how the term ‘inspirational' is defines and discusses the range of work being done by so many women in Nepal that is truly inspiring. Through a discourse analysis of their stories of childhood and education we can see what key factors have played a role in enabling these women to realise their potential and to overcome intersectional barriers to work in a range of diverse positions, from the first female District Development Officer to the first women to gain her doctorate from overseas, to women who have set up NGOS working towards a more equitable and just society to others who have set up their own businesses or becoming leading academics. The conclusion draws together some key recommendations for future research and policy makers as well as those seeking to promote more equitable sustainable development that truly includes women in the process as autonomous, heterogeneous actors in the development process

scholarly journals Comparative Analysis of Splash Erosion Devices for Rainfall Simulation Experiments: A Laboratory Study

Water ◽  
2019 ◽  
Vol 11 (6) ◽  
pp. 1228 ◽  
Author(s):  
María Fernández-Raga ◽  
Julián Campo ◽  
Jesús Rodrigo-Comino ◽  
Saskia D. Keesstra
Keyword(s):  
Rainfall Simulation ◽  
Key Factors ◽  
Erosion Process ◽  
Rain Intensity ◽  
Significant Relation ◽  
Simulation Experiments ◽  
Rainfall Characteristics ◽  
Splash Erosion ◽  
Simulated Rain ◽  
Set Up

For the study of soil erosion it is important to set up the experiments well. In the experimental design one of the key factors is the choice of the measurement device. This is especially important when one part of the erosion process needs to be isolated, such as for splash erosion. Therefore, the main aim of this research is to list the general characteristics of the commonly used splash erosion devices and to discuss the performance, to be able to relate them, and make suggestions regarding their use. The devices we selected for this comparative comparison were: the splash cup, funnel, Morgan tray, Tübingen cup, tower, and the gutter. The devices were tested under the same conditions (rainfall characteristics, slope, and soil type) to assess their hydrological response under different intensities of simulated rainfall. All devices were installed on a sloping plot (10°) with sandy soil, and were exposed to 10 min. of simulated rain with intensities ranging from 60 to 172 mm/h to measure the splashed sediment, and to describe problems and differences among them. The results showed that the Tübingen cup was the best performing device to measure kinetic energy of the rain, but, because of its design, it is not possible to measure the detached splashed sediment under natural (field) conditions. On the other hand, the funnel device showed a significant relation with rain intensity because it loses little sediment to washing. In addition, the device is easy to use and cheap. Therefore, this device is highly recommended to estimated splash erosion. to the good performance measuring the actual splash erosion, because it loses little sediment by washing. The device is also cheap and easy to install and manage.

scholarly journals Re-criticism of Geomantic Omen in Modern Design from the Perspective of Data Analysis

2019 ◽  
Vol 25 ◽  
pp. 03004
Author(s):  
Qi Liu ◽  
Huagang Yang ◽  
Yiwei Zhang
Keyword(s):  
Chinese Culture ◽  
Modern Science ◽  
Theoretical Research ◽  
Research Trend ◽  
Key Factors ◽  
Modern Design ◽  
History Of Thought ◽  
History Of ◽  
Set Up ◽  
Development Practice

Geomantic omen is both strange and familiar to the contemporary people. It is not only a part of the traditional Chinese culture, but also contains the contradictions and disputes in Chinese long history of thought, practice and theory. This article is based on the context of modern design, discuss the reason of the Geomantic omen cannot be the key factors of modern design from three perspectives, including research trend, discipline development, practice creation. Through the summary of data, typical cases, and geomantic theory, it is believed that modern geomantic research should be based on rational evaluation and theoretical research. Except that, geomancy can be study not only by using modern science and technology, but also through transcending the ideological level. Finally, the idea of the future development of geomantic is set up for the re-thinking and re-exploration of the contemporary research.

scholarly journals The Marketing System of Agricultural Products in Bangladesh: A Case Study from Sylhet District

2019 ◽  
Vol 26 (2) ◽  
Author(s):  
Md. Mizanur Rahman Rahman ◽  
Shahnaz Begum Neena
Keyword(s):  
Crop Production ◽  
Agricultural Products ◽  
High Price ◽  
Key Factors ◽  
Marketing System ◽  
Agricultural Marketing ◽  
Marketing Systems ◽  
Market Management ◽  
Set Up

The monotonous demand for rice in Bangladesh is shifting rapidly. Positive economic growth andurbanization are the key factors behind this change. The agricultural marketing system is traditional andnot properly functional. A group of intermediaries controls the market and supply chain of agriculturalproducts. A proper functional market is vital for food producers, processors, traders, and consumers.Bangladesh has become self-sufficient in cereal crop production, but the production of horticulturalcrops is not sufficient yet. This situation has led to severe bottlenecks in the processes of marketing. Thestudy aimed at assessing the present marketing system of agricultural products in Sylhet and atdetermining the marketing constraints and potentialities of farm products in this area. It was found thatthe net marketing margin was the highest in the case of the retailer and the lowest in case of Aratdar. ButReturn on operating capital was the highest for the Aratdar because they did not need to purchase theproduct they handle. The farmers identified the high price of seed as the topmost constraint in productionand marketing systems. Re-structuring of Market Management System and updating regulatory andinstitutional set up are highly essential for the proper functioning of the market system.

scholarly journals Access to Ethics Committees in Bulgaria – Possibility or Probability

2019 ◽  
Vol 46 (3) ◽  
pp. 29-33
Author(s):  
N. Gradinarova
Keyword(s):  
Ethics Committees ◽  
Legal Framework ◽  
Healthcare Systems ◽  
The European Union ◽  
Key Factors ◽  
Medical Specialists ◽  
Patient Organizations ◽  
Hospital Patients ◽  
Set Up ◽  
The Eu

Abstract The study of the legal framework regulating the activities of the Ethics Committees in the Member States of the European Union outlines several key factors forming the basis of the activity of the Ethics Committees. Compliance with the ethical principles of behaviour by physicians, patients, patients relatives, patient organizations and by the society as a whole requires professionals dealing with medical ethics and law to form, defend and bring to the knowledge and implementation an ethical code of behaviour of all participants in clinical trials as well as in the provision of medical services in general. The modern legal framework in Bulgaria, regulating the nature, functions and powers of the ethics committees, is complex and multi-layered, including both constitutional law and a number of acts at the law and bylaw level. Ethical committees set up in medical establishments aim to help physicians and other medical and non-medical specialists in the hospital, patients and their families coping with the ethical and legal dilemmas they face in everyday life. The results of a survey conducted among 149 medical specialists and 269 patients working and being treated in three different medical establishments in the country show that there is a low level of awareness of the types of ethical committees and their functions. 51% of the questioned medical specialists and 62.5% of the questioned patients replied that they were not aware when issues could be referred to the ethics committees in the country. The analysis of the regulation of the activities of ethics committees in the healthcare systems within the EU and in the health system in Bulgaria shows that there is a need to optimize the activity of the ethics committees operating on the territory of the country.

scholarly journals Competition Experience, Relative Age Effect and Average Age of the Senior World Events’ Medal-Winning Basketball Players

2020 ◽  
Vol 65 (3) ◽  
pp. 5-18
Author(s):  
Zsombor Zilinyi ◽  
Ágoston Nagy ◽  
Tamás Sterbenz
Keyword(s):  
Age Effect ◽  
Head Coaches ◽  
Key Factors ◽  
Basketball Players ◽  
Association Coefficient ◽  
Relative Age ◽  
Relative Age Effect ◽  
Talent Selection ◽  
Other World ◽  
Set Up

"The International Basketball Federation (FIBA) has changed its youth competition system in 2004, and due to this regulation, many players had the chance to compete every year at youth level and later, to elevate to the top. The purpose of our study was to inspect those medal-winning European basketball players who competed in the past 19 senior basketball world events. We analysed the tendencies of selection by dissecting the set-up of successful senior national teams. We investigated each one of the 281 European basketball players who won a medal during the analysed period (2000-2019). We collected data from the archive page of FIBA. Our goal was to see whether there was a relation between the youth competition experience and the minutes spent in senior world events. We used the Cramer Association Coefficient, Relative Age Effect and average age were also inspected. We found that participation in the national youth tournaments is important but not the most exclusive factor of selection. There are opportunities for success in the adult national teams for players who have covered alternative sports careers – the factor of national youth experience is not exclusive. We suppose that head coaches utilize older and more experienced players on the Olympic Games, the average ages of successful Olympic medal-winner teams are higher than other world events’ medallists. Despite the fact that we were not able to find statistically proven and associative relationship between national youth recruitment eligibility and the minutes in game spent by successful adult players, further research could be gap fillers in exploring key factors in adulthood efficiency. Keywords: talent selection, competition experience, FIBA, basketball players, sport career."

Sign in / Sign up

Export Citation Format

Share Document