A method of core concept extraction based on semantic‐weight ranking

2021 ◽  
Author(s):  
Han Zhong ◽  
Zhenhu Ning ◽  
Guijun Li ◽  
Zheng Li
Keyword(s):  
Core Concept ◽  
Concept Extraction

scholarly journals Research on Blockchain-Based E-Bidding System

2021 ◽  
Vol 11 (9) ◽  
pp. 4011
Author(s):  
Dan Wang ◽  
Jindong Zhao ◽  
Chunxiao Mu
Keyword(s):  
Data Transmission ◽  
Privacy Protection ◽  
Graph Isomorphism ◽  
Third Party ◽  
Business Logic ◽  
Core Concept ◽  
The Core ◽  
Blockchain Technology ◽  
Smart Contract ◽  
Bidding Process

In the field of modern bidding, electronic bidding leads a new trend of development, convenience and efficiency and other significant advantages effectively promote the reform and innovation of China’s bidding field. Nowadays, most systems require a strong and trusted third party to guarantee the integrity and security of the system. However, with the development of blockchain technology and the rise of privacy protection, researchers has begun to emphasize the core concept of decentralization. This paper introduces a decentralized electronic bidding system based on blockchain and smart contract. The system uses blockchain to replace the traditional database and uses chaincode to process business logic. In data interaction, encryption techniques such as zero-knowledge proof based on graph isomorphism are used to improve privacy protection, which improves the anonymity of participants, the privacy of data transmission, and the traceability and verifiable of data. Compared with other electronic bidding systems, this system is more secure and efficient, and has the nature of anonymous operation, which fully protects the privacy information in the bidding process.

scholarly journals Internal barriers to efficiency: why disinvestments are so difficult. Identifying and addressing internal barriers to disinvestment of health technologies

2021 ◽  
pp. 1-16
Author(s):  
Bjørn Hofmann
Keyword(s):  
Health Care ◽  
Health Economics ◽  
Cognitive Biases ◽  
Care Practice ◽  
Core Concept ◽  
Health Care Practice ◽  
Health Technologies ◽  
Sound Foundation ◽  
Internal Barriers ◽  
Efficient Care

Abstract Although efficiency is a core concept in health economics, its impact on health care practice still is modest. Despite an increased pressure on resource allocation, a widespread use of low-value care is identified. Nonetheless, disinvestments are rare. Why is this so? This is the key question of this paper: why are disinvestments not more prevalent and improving the efficiency of the health care system, given their sound foundation in health economics, their morally important rationale, the significant evidence for a long list of low-value care and available alternatives? Although several external barriers to disinvestments have been identified, this paper looks inside us for mental mechanisms that hamper rational assessment, implementation, use and disinvestment of health technologies. Critically identifying and assessing internal inclinations, such as cognitive biases, affective biases and imperatives, is the first step toward a more rational handling of health technologies. In order to provide accountable and efficient care we must engage in the quest against the figments of our minds; to disinvest in low-value care in order to provide high-value health care.

Models for Integrating Medical Acupuncture into Practice: An Exploratory Qualitative Study of Physicians— Experiences

2016 ◽  
Vol 34 (4) ◽  
pp. 280-289 ◽  
Author(s):  
Ellen T Crumley
Keyword(s):  
Qualitative Study ◽  
General Practitioners ◽  
Full Time ◽  
Snowball Sampling ◽  
Core Concept ◽  
Structured Interviews ◽  
The Core ◽  
Individual Physician ◽  
Part Time ◽  
Medical Acupuncture

Background Internationally, physicians are integrating medical acupuncture into their practice. Although there are some informative surveys and reviews, there are few international, exploratory studies detailing how physicians have accommodated medical acupuncture (eg, by modifying schedules, space and processes). Objective To examine how physicians integrate medical acupuncture into their practice. Methods Semi-structured interviews and participant observations of physicians practising medical acupuncture were conducted using convenience and snowball sampling. Data were analysed in NVivo and themes were developed. Despite variation, three principal models were developed to summarise the different ways that physicians integrated medical acupuncture into their practice, using the core concept of ‘helping’. Quotes were used to illustrate each model and its corresponding themes. Results There were 25 participants from 11 countries: 21 agreed to be interviewed and four engaged in participant observations. Seventy-two per cent were general practitioners. The three models were: (1) appointments (44%); (2) clinics (44%); and (3) full-time practice (24%). Some physicians held both appointments and regular clinics (models 1 and 2). Most full-time physicians initially tried appointments and/or clinics. Some physicians charged to offset administration costs or compensate for their time. Discussion Despite variation within each category, the three models encapsulated how physicians described their integration of medical acupuncture. Physicians varied in how often they administered medical acupuncture and the amount of time they spent with patients. Although 24% of physicians surveyed administered medical acupuncture full-time, most practised it part-time. Each individual physician incorporated medical acupuncture in the way that worked best for their practice.

scholarly journals ToU Pricing-Based Dynamic Electricity Theft Detection in Smart Grid Using Gradient Boosting Classifier

2021 ◽  
Vol 11 (1) ◽  
pp. 401
Author(s):  
Rajiv Punmiya ◽  
Sangho Choe
Keyword(s):  
Smart Grid ◽  
Dynamic Pricing ◽  
Gradient Boosting ◽  
Core Concept ◽  
Actual Usage ◽  
Electricity Theft ◽  
Extreme Gradient Boosting ◽  
New Type ◽  
Near Future ◽  
Very High

In the near future, it is highly expected that smart grid (SG) utilities will replace existing fixed pricing with dynamic pricing, such as time-of-use real-time tariff (ToU). In ToU, the price of electricity varies throughout the whole day based on the respective utilities’ decisions. We classify the whole day into two periods with very high and low probabilities of theft activities, termed as the “theft window” and “non-theft window”, respectively. A “smart” malicious consumer can adjust his/her theft to mostly targeting the theft window, manipulate actual usage reporting to outsmart existing theft detectors, and achieve the goal of “paying reduced tariff”. Simulation results show that existing schemes do not detect well such window-based theft activities conversely exploiting ToU strategies. In this paper, we begin by introducing the core concept of window-based theft cases, which is defined at the basis of ToU pricing as well as consumption usage. A modified extreme gradient boosting (XGBoost) based machine learning (ML) technique called dynamic electricity theft detector (DETD) has been presented to detect a new type of theft cases.

Biofluid Mechanics

2021 ◽  
Author(s):  
James B. Grotberg
Keyword(s):  
Fluid Mechanics ◽  
Teaching Experience ◽  
Worked Examples ◽  
Normal Function ◽  
Student Understanding ◽  
Core Concept ◽  
Biofluid Mechanics ◽  
Years Of Teaching Experience ◽  
Clinical Correlations ◽  
Maple Code

Condensing 40 years of teaching experience, this unique textbook will provide students with an unrivalled understanding of the fundamentals of fluid mechanics, and enable them to place that understanding firmly within a biological context. Each chapter introduces, explains, and expands a core concept in biofluid mechanics, establishing a firm theoretical framework for students to build upon in further study. Practical biofluid applications, clinical correlations, and worked examples throughout the book provide real-world scenarios to help students quickly master key theoretical topics. Examples are drawn from biology, medicine, and biotechnology with applications to normal function, disease, and devices, accompanied by over 500 figures to reinforce student understanding. Featuring over 120 multicomponent end-of-chapter problems, flexible teaching pathways to enable tailor-made course structures, and extensive Matlab and Maple code examples, this is the definitive textbook for advanced undergraduate and graduate students studying a biologically-grounded course in fluid mechanics.

Method for automatic key concepts extraction

2019 ◽  
Vol 37 (1) ◽  
pp. 2-15 ◽  
Author(s):  
Sudarsana Desul ◽  
Madurai Meenachi N. ◽  
Thejas Venkatesh ◽  
Vijitha Gunta ◽  
Gowtham R. ◽  
...  
Keyword(s):  
Coming Out ◽  
English Language ◽  
Hybrid Approach ◽  
Ontology Learning ◽  
Specific Domain ◽  
Content Type ◽  
Concept Extraction ◽  
Nuclear Domain ◽  
Wide Range ◽  
Key Concepts

PurposeOntology of a domain mainly consists of a set of concepts and their semantic relations. It is typically constructed and maintained by using ontology editors with substantial human intervention. It is desirable to perform the task automatically, which has led to the development of ontology learning techniques. One of the main challenges of ontology learning from the text is to identify key concepts from the documents. A wide range of techniques for key concept extraction have been proposed but are having the limitations of low accuracy, poor performance, not so flexible and applicability to a specific domain. The propose of this study is to explore a new method to extract key concepts and to apply them to literature in the nuclear domain.Design/methodology/approachIn this article, a novel method for key concept extraction is proposed and applied to the documents from the nuclear domain. A hybrid approach was used, which includes a combination of domain, syntactic name entity knowledge and statistical based methods. The performance of the developed method has been evaluated from the data obtained using two out of three voting logic from three domain experts by using 120 documents retrieved from SCOPUS database.FindingsThe work reported pertains to extracting concepts from the set of selected documents and aids the search for documents relating to given concepts. The results of a case study indicated that the method developed has demonstrated better metrics than Text2Onto and CFinder. The method described has the capability of extracting valid key concepts from a set of candidates with long phrases.Research limitations/implicationsThe present study is restricted to literature coming out in the English language and applied to the documents from nuclear domain. It has the potential to extend to other domains also.Practical implicationsThe work carried out in the current study has the potential of leading to updating International Nuclear Information System thesaurus for ontology in the nuclear domain. This can lead to efficient search methods.Originality/valueThis work is the first attempt to automatically extract key concepts from the nuclear documents. The proposed approach will address and fix the most of the problems that are existed in the current methods and thereby increase the performance.

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