Statistical analysis of classification

1966 ◽  
Vol 24 ◽  
pp. 188-189
Author(s):  
T. J. Deeming

If we make a set of measurements, such as narrow-band or multicolour photo-electric measurements, which are designed to improve a scheme of classification, and in particular if they are designed to extend the number of dimensions of classification, i.e. the number of classification parameters, then some important problems of analytical procedure arise. First, it is important not to reproduce the errors of the classification scheme which we are trying to improve. Second, when trying to extend the number of dimensions of classification we have little or nothing with which to test the validity of the new parameters.Problems similar to these have occurred in other areas of scientific research (notably psychology and education) and the branch of Statistics called Multivariate Analysis has been developed to deal with them. The techniques of this subject are largely unknown to astronomers, but, if carefully applied, they should at the very least ensure that the astronomer gets the maximum amount of information out of his data and does not waste his time looking for information which is not there. More optimistically, these techniques are potentially capable of indicating the number of classification parameters necessary and giving specific formulas for computing them, as well as pinpointing those particular measurements which are most crucial for determining the classification parameters.

1956 ◽  
Vol 21 (3) ◽  
pp. 304-308 ◽  
Author(s):  
H. G. Rice

The two results of this paper (a theorem and an example) are applications of a device described in section 1. Our notation is that of [4], with which we assume familiarity. It may be worth while to mention in particular the function Φ(n, x) which recursively enumerates the partial recursive functions of one variable, the Cantor enumerating functions J(x, y), K(x), L(x), and the classes F and Q of r.e. (recursively enumerable) and finite sets respectively.It is possible to “give” a finite set in a way which conveys the maximum amount of information; this may be called “giving explicitly”, and it requires that in addition to an effective enumeration or decision procedure for the set we give its cardinal number. It is sometimes desired to enumerate effectively an infinite class of finite sets, each given explicitly (e.g., [4] p. 360, or Dekker [1] p. 497), and we suggest here a device for doing this.We set up an effective one-to-one correspondence between the finite sets of non-negative integers and these integers themselves: the integer , corresponds to the set αi, = {a1, a2, …, an} and inversely. α0 is the empty set. Clearly i can be effectively computed from the elements of αi and its cardinal number.


2019 ◽  
Vol 3 (1) ◽  
pp. 65-72
Author(s):  
Yulianto Yulianto ◽  
Namira Robihaningrum ◽  
Bella Dhea Elinda

The management of writing a scientific papers we already know has important chapters in the writing. And have a way of choosing in a variety of methods. There are problems in this study, namely the absence of the use of research methods in scientific-rich management. Then one of them is needed by multivariate data analysis management to become one of the methods in writing scientific papers. Multivariate data is data collected from two or more observations by measuring these observations with several characteristics. There are 2 (two) methods in multivariate data, namely dependency and interdependence methods. Dependency analysis functions to explain or predict dependent variables by using two or more independent variables. Focused on the dependency method there are 9 (nine) classifications. It is expected that the multivariate data analysis management can help writers to use scientific research methods well and be able to analyze the influence of several variables on other variables at the same time


Author(s):  
Cecilia Alejandra Marambio Carrasco ◽  
Carla Lobos Stevens

The objective of the study is to support students in the rational, logical, and analytical process that they perform when faced with a scientific problem. This study uses qualitative methodology as its purpose is to present the strategy as learning stemming from the process of analysis, which is rooted on how to detect scientifically the research problem in the field of social sciences. A statistical analysis is made on the use and application of the diagram in a sample of 27 undergraduate students who have used the situational map in the elaboration of their theses. The trend shows that 92.6% of respondents achieved concluding their research processes of thesis work, at the planned time, and their results were consistent with their hypothesis and/or purposes. The creation of this strategy is a support for students, who have not developed their ability to think critically and establish relationships between concepts and theories in the execution of scientific research.


Webology ◽  
2021 ◽  
Vol 18 (Special Issue 04) ◽  
pp. 303-318
Author(s):  
Dr. Sumaya Abbas Majeed Al-Rubaye

The study is based on the idea that for a good determination of the techniques adopted in pushing or withdrawing information and knowledge according to the requirements of the type of decisions and according to the appropriate time will lead to achieving a performance that exceeds the ministry's expectations and outside the familiar and the scheme and on that the researcher used the philosophical analysis and preparation of a questionnaire using the Likert pentagon scale and the adoption of descriptive and statistical analysis of the side results Practical, where I found a correlation and influence between the variables of the study, but it is relatively medium in most of its variables to show the ministry's need to support and enhance the capabilities necessary for workers to obtain knowledge at the specified time for the urgent need for them to accomplish the tasks entrusted to them.


Author(s):  
Mahdi Abdalla Mohamed, Musa Abdalla Mohamed

The study is focusing on the factors which are leading to know the weakness link between the scientific research and economic development in the White Nile state. The important target of the study is to determinate the role of scientific research in the economic development. The study dependence on the statistical analysis method, historical and descriptive method. It aims to collect information related to the problem. The most important result of the study that state has significant savings in production. The most important recommendations of the study the necessity of using scientific research to achieve economic development.


2020 ◽  
Vol 16 (12) ◽  
pp. 1145-1151
Author(s):  
Subhabrata Maiti ◽  

It is of interest to document the accuracy, time dependent dimensional stability and displacement to load for 5 types of inter-occlusal recording materials. We used cad bite paste, putty, lab putty, pattern resin and poly tray acrylic material in this study. A total of 25 samples were fabricated to evaluate the accuracy and dimensional stability. The amount of displacement was calculated by applying displacing force on the bite registration materials till they fractured using Instron 3000 UTS machine. Statistical analysis of the data shows that CAD bite paste has the maximum amount of accuracy and dimensional stability whereas pattern resin showed the least amount of displacement to applied force. Thus, we report that CAD bite registration material displayed best results in terms of accuracy and dimensional stability and moderate results in terms of displacement to force.


2021 ◽  
Vol 34 (02) ◽  
pp. 123-129
Author(s):  
Lex Rutten ◽  
Raj Kumar Manchanda ◽  
José Eizayaga

AbstractDuring the past century, the amount of information about homeopathic medicines has grown dramatically. However, the recent coronavirus disease 2019 pandemic has shown that homeopathic practitioners do not use more medicines than a century ago and they seem to use less symptoms to find the proper medicine. This could be explained by the fact that the more than a hundred years old repertory was flawed from the beginning and that more information in the repertory leads the practitioner astray in an increasingly complex labyrinth of data.This can be resolved by applying modern data management techniques based on systematic collection of treatment data and statistical analysis of the data. Homeopathic practitioners should collect these data avoiding bias. This requires additional training of practitioners, which should also result in a higher scientific level of homeopathic practice and increasingly effective treatment as the database grows.


Cryptography ◽  
2020 ◽  
Vol 4 (3) ◽  
pp. 24
Author(s):  
Noah Cowper ◽  
Harry Shaw ◽  
David Thayer

The ability to send information securely is a vital aspect of today’s society, and with the developments in quantum computing, new ways to communicate have to be researched. We explored a novel application of quantum key distribution (QKD) and synchronized chaos which was utilized to mask a transmitted message. This communication scheme is not hampered by the ability to send single photons and consequently is not vulnerable to number splitting attacks like other QKD schemes that rely on single photon emission. This was shown by an eavesdropper gaining a maximum amount of information on the key during the first setup and listening to the key reconciliation to gain more information. We proved that there is a maximum amount of information an eavesdropper can gain during the communication, and this is insufficient to decode the message.


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