Estimating the size of hidden data sources by queries

Author(s):  
Yan Wang ◽  
Jie Liang ◽  
Jianguo Lu
Keyword(s):  
2021 ◽  
Vol 13 (03) ◽  
pp. 27-42
Author(s):  
Lanqin Sang ◽  
Henry Hexmoor

This paper proposes an application of blockchain technology for securing the infrastructure of the modern power grid - an Information-Centric design for the blockchain network. In this design, all the transactions in the blockchain network are classified into different groups, and each group has a group number. A sender’s identity is encrypted by the control centre’s public key; energy data is encrypted by the subscriber’s public key, and by a receiver’s public key if this transaction is for a specific receiver; a valid signature is created via a group message and the group publisher’s private key. Our implementation of the design demonstrated the proposal is applicable, publisher’s identities are protected, data sources are hidden, data privacy is maintained, and data consistency is preserved.


Author(s):  
I. D. Rudinskiy ◽  
D. Ya. Okolot

The article discusses aspects of the formation of information security culture of college students. The relevance of the work is due to the increasing threats to the information security of the individual and society due to the rapid increase in the number of information services used. Based on this, one of the important problems of the development of the information society is the formation of a culture of information security of the individual as part of the general culture in its socio-technical aspect and as part of the professional culture of the individual. The study revealed the structural components of the phenomenon of information security culture, identified the reasons for the interest in the target group of students. It justifies the need for future mid-level specialists to form an additional universal competency that ensures the individual’s ability and willingness to recognize the need for certain information, to identify and evaluate the reliability and reliability of data sources. As a result of the study, recommendations were formulated on the basis of which a culture of information security for college students can be formed and developed and a decomposition of this process into enlarged stages is proposed. The proposals on the list of disciplines are formulated, within the framework of the study of which a culture of information security can develop. The authors believe that the recommendations developed will help future mid-level specialists to master the universal competency, consisting in the ability and willingness to recognize the need for certain information, to identify and evaluate the reliability and reliability of data sources, as well as to correctly access the necessary information and its further legitimate use, which ultimately forms a culture of information security.


Author(s):  
Endang Maruti

The research aims to uncover the symbols in the novel The Alchemist and to gain knowledge about the moral teachings in the symbol. This research is descriptive qualitative approach. Data sources in this study are words, phrases or sentences in the novel Alchemist. Data collection method is a literature study method with note taking technique. Data were analyzed using description and content analysis methods. The results showed that the novel The Alchemist contained many symbols. These symbols include: (1) wise parents, who symbolize both negative and positive things. From his appearance, parents can symbolize something bad, but behind his old age he symbolizes a knowledge that is very much and wise; (2) stones that symbolize something hard, not easily broken, and can provide clues to something; and (3) deserts or deserts which can be interpreted as symbols of drought, aridity, unattractiveness, emptiness, despair, determination for ignorance, and also as symbols of devotion.  


Author(s):  
Shanty Bahar Ising ◽  
Mujiono Mujiono

This study aims to find out, describe and analyze the democratic leadership of the Principal in improving achievement at the Palangka Raya Model State Madrasah (MAN). The research method used is descriptive qualitative. The researcher wanted to describe the Principal's democratic leadership in improving achievement at the Palangka Raya Model State Islamic Senior High School (MAN). Primary data sources (person) are the Principal, Teachers (Teachers) and Students of MAN Model Palangka Raya. Whereas secondary data sources are the data in the Palangka Raya Model MAN and supporting literature. The results of the study show that the Principal's leadership in improving achievement in the Palangka Raya Model MAN is very democratic, this condition can be seen from: (1) Principals are happy to receive suggestions, opinions and even criticism from subordinates both delivered by students and teachers through suggestion boxes and in the teacher council meeting, (2) the Principal always strives to prioritize teamwork cooperation in an effort to achieve the goal by appointing the instructor teacher, trainer teacher and mentor teacher and conducting deliberation in planning, implementing and evaluating activities, (3) the Principal always tries to make subordinates more success than him, which is realized by including teachers in seminars, workshops, training and competitions so that they get achievements both locally and nationally, and (4) Principals always try to develop their personal capacity as good leaders in conceptual skills, human skill and technical skill.


2018 ◽  
Vol 12 ◽  
pp. 85-98
Author(s):  
Bojan Kostadinov ◽  
Mile Jovanov ◽  
Emil STANKOV

Data collection and machine learning are changing the world. Whether it is medicine, sports or education, companies and institutions are investing a lot of time and money in systems that gather, process and analyse data. Likewise, to improve competitiveness, a lot of countries are making changes to their educational policy by supporting STEM disciplines. Therefore, it’s important to put effort into using various data sources to help students succeed in STEM. In this paper, we present a platform that can analyse student’s activity on various contest and e-learning systems, combine and process the data, and then present it in various ways that are easy to understand. This in turn enables teachers and organizers to recognize talented and hardworking students, identify issues, and/or motivate students to practice and work on areas where they’re weaker.


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