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Bulletin of the Transilvania University of Brasov Series V Economic Sciences最新文献

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Invo-k-clean rings Invo-k-clean环
Bulletin of the Transilvania University of Brasov Series V Economic Sciences Pub Date : 2022-12-29 DOI: 10.31926/but.mif.2022.2.64.2.12
F. Rashedi
{"title":"Invo-k-clean rings","authors":"F. Rashedi","doi":"10.31926/but.mif.2022.2.64.2.12","DOIUrl":"https://doi.org/10.31926/but.mif.2022.2.64.2.12","url":null,"abstract":"In this paper, we offer a new generalization of the invo-clean ring that is called invo k-clean ring. Let 2 ≤ k ∈ ℕ }. Then a ring R is called invo k-clean if for each a ∈ R there exist v ∈ Inv(R) and e ∈ Pk(R) such that a = u + e. We obtain some properties of invo k-clean rings.","PeriodicalId":53266,"journal":{"name":"Bulletin of the Transilvania University of Brasov Series V Economic Sciences","volume":"14 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75515430","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Commutativity of prime rings with generalized (α,β)-reverse derivations satisfying certain identities 具有满足某些恒等式的广义(α，β)-逆导数的素环的交换性
Bulletin of the Transilvania University of Brasov Series V Economic Sciences Pub Date : 2022-12-29 DOI: 10.31926/but.mif.2022.2.64.2.1
Radwan M. Al-omary
{"title":"Commutativity of prime rings with generalized (α,β)-reverse derivations satisfying certain identities","authors":"Radwan M. Al-omary","doi":"10.31926/but.mif.2022.2.64.2.1","DOIUrl":"https://doi.org/10.31926/but.mif.2022.2.64.2.1","url":null,"abstract":"In this note we investigated some conditions related to the commutativity of a prime ring R that satisfies certain identities and possesses a generalized (α, β)-reverse derivation. A few examples and counterexamples are also studied.","PeriodicalId":53266,"journal":{"name":"Bulletin of the Transilvania University of Brasov Series V Economic Sciences","volume":"24 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79653955","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Ricci solitons on pseudo Riemannian generalized symmetric spaces 伪黎曼广义对称空间上的Ricci孤子
Bulletin of the Transilvania University of Brasov Series V Economic Sciences Pub Date : 2022-12-29 DOI: 10.31926/but.mif.2022.2.64.2.4
Amel Bouharis
{"title":"Ricci solitons on pseudo Riemannian generalized symmetric spaces","authors":"Amel Bouharis","doi":"10.31926/but.mif.2022.2.64.2.4","DOIUrl":"https://doi.org/10.31926/but.mif.2022.2.64.2.4","url":null,"abstract":"We study the geometry of four-dimensional pseudo Riemannian generalized symmetric spaces of type D; whose metric was explicitly described by Cerny and Kowalski. After describing their curvature properties; we classify the Killing vectors field of these spaces and more particularly, we study the existence of non-trivial (i.e., not Einstein) Ricci solitons; we show that these spaces are shrinking or expanding Ricci solitons but never steady. Moreover this Ricci soliton is not a gradient one.","PeriodicalId":53266,"journal":{"name":"Bulletin of the Transilvania University of Brasov Series V Economic Sciences","volume":"43 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85695320","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
About some speeds of convergence to the constant of Euler 关于一些收敛到欧拉常数的速度
Bulletin of the Transilvania University of Brasov Series V Economic Sciences Pub Date : 2022-12-29 DOI: 10.31926/but.mif.2022.2.64.2.13
A. Vernescu
{"title":"About some speeds of convergence to the constant of Euler","authors":"A. Vernescu","doi":"10.31926/but.mif.2022.2.64.2.13","DOIUrl":"https://doi.org/10.31926/but.mif.2022.2.64.2.13","url":null,"abstract":"The speed of convergence of the classical sequence which defines the constant of Euler (or Euler-Mascheroni), γ = lim n→∞ γn = 0, 577215 . . . , where γn =(∑k=1n 1/k ) − ln n, was intensively studied. In 1983 I established in [14] one of the first two sided estimates of this speed, namely 1/2n+1 < γn−γ < 1/2n. Further several new sequences with a faster convergence are defined either by modifying the argument of the logarithm (De Temple, 1993, Negoi 1997, Ivan 2002) or by modifying the last term 1/n of the harmonic sum (Vernescu 1999). Now we give a systematic study of these speeds of convergence and especially of the last ones.","PeriodicalId":53266,"journal":{"name":"Bulletin of the Transilvania University of Brasov Series V Economic Sciences","volume":"32 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80349908","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Refined inequalities for the distance in metric spaces 改进了度量空间中距离的不等式
Bulletin of the Transilvania University of Brasov Series V Economic Sciences Pub Date : 2022-12-29 DOI: 10.31926/but.mif.2022.2.64.2.5
S. Dragomir
{"title":"Refined inequalities for the distance in metric spaces","authors":"S. Dragomir","doi":"10.31926/but.mif.2022.2.64.2.5","DOIUrl":"https://doi.org/10.31926/but.mif.2022.2.64.2.5","url":null,"abstract":"In this note we prove among others that\u0000∑1≤i<j≤npipjdS(xi,xj)≤ {2s−1 infx∈X [ Σ k=1n pk (1 − pk) ds (xk, x)], s ≥ 1; infx∈X [ Σ k=1n pk (1 − pk) ds (xk, x)] , 0 < s < 1, where (X, d) is a metric space, xi ∈ X, pi ≥ 0, i ∈ {1, ..., n} with Σ i=1n pi = 1 and s > 0. This generalizes and improves some early upper bounds for the sum Σ1≤i<j≤n pipjd (xi, xj) .","PeriodicalId":53266,"journal":{"name":"Bulletin of the Transilvania University of Brasov Series V Economic Sciences","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84408946","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Equivalence of K-functional and modulus of smoothness constructed by Fourier-Bessel transform in the space L2,γ(ℝn+) 空间L2中由傅里叶-贝塞尔变换构造的k泛函的等价性和光滑模
Bulletin of the Transilvania University of Brasov Series V Economic Sciences Pub Date : 2022-12-29 DOI: 10.31926/but.mif.2022.2.64.2.6
M. El hamma, A. Mahfoud
{"title":"Equivalence of K-functional and modulus of smoothness constructed by Fourier-Bessel transform in the space L2,γ(ℝn+)","authors":"M. El hamma, A. Mahfoud","doi":"10.31926/but.mif.2022.2.64.2.6","DOIUrl":"https://doi.org/10.31926/but.mif.2022.2.64.2.6","url":null,"abstract":"Using a generalized shift operator, we define generalized modulus of smothness in the space L2,γ(ℝn+). Based on the Laplace-Bessel differential operator we define Sobolev-type space and K-functionals. In this paper paper we prove the equivalence theorem for a K-functional and a modulus of smoothness for the Fourier-Bessel transformation on ℝn+.","PeriodicalId":53266,"journal":{"name":"Bulletin of the Transilvania University of Brasov Series V Economic Sciences","volume":"84 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83865357","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Using Python in developing video games 使用Python开发电子游戏
Bulletin of the Transilvania University of Brasov Series V Economic Sciences Pub Date : 2022-12-29 DOI: 10.31926/but.mif.2022.2.64.2.16
D. Simian, A. Vulpeanu
{"title":"Using Python in developing video games","authors":"D. Simian, A. Vulpeanu","doi":"10.31926/but.mif.2022.2.64.2.16","DOIUrl":"https://doi.org/10.31926/but.mif.2022.2.64.2.16","url":null,"abstract":"The aim of this paper is to investigate the capabilities of Python language to be used for game developing. On the other hand we are interested in analyzing the advantages offered by Python in introducing students and non-professionals in the game design world. As a prove of concept we implemented a slider game in Python using Ursina engine and highlighted how easy different concepts from game design can be implemented using Python.The conclusion is that the main disadvantage of Python (time execution) can be overcome exploiting the multiple data structures provided by the language, the use of OOP (Object Oriented Programming) and of multitude of available frameworks. The ease of learning and understanding the language is a major advantage. Our code can be accessed on Github. Our study and project can also be used as a starting point for developing Python-based projects for introductory game design courses.","PeriodicalId":53266,"journal":{"name":"Bulletin of the Transilvania University of Brasov Series V Economic Sciences","volume":"48 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87064991","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The Importance of Social Media Marketing Strategies for Small Businesses 社交媒体营销策略对小企业的重要性
Bulletin of the Transilvania University of Brasov Series V Economic Sciences Pub Date : 2022-12-22 DOI: 10.31926/but.es.2022.15.64.2.4
A. Popescu, A. Tulbure (Handaric)
{"title":"The Importance of Social Media Marketing Strategies for Small Businesses","authors":"A. Popescu, A. Tulbure (Handaric)","doi":"10.31926/but.es.2022.15.64.2.4","DOIUrl":"https://doi.org/10.31926/but.es.2022.15.64.2.4","url":null,"abstract":"Small businesses represent a consistent part of economies in general and their results can be improved by using marketing tools and channels efficiently and profitably. The paper aims to underline the importance of social media and social media marketing for small businesses as an effective and low-cost way to improve their overall performance. For this purpose, systematic research and analysis were performed using literature sources, studies, and online information.","PeriodicalId":53266,"journal":{"name":"Bulletin of the Transilvania University of Brasov Series V Economic Sciences","volume":"33 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75067832","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
The Concept of Burnout in the Medical Field: A Literature Review 医学领域的职业倦怠概念:文献综述
Bulletin of the Transilvania University of Brasov Series V Economic Sciences Pub Date : 2022-12-22 DOI: 10.31926/but.es.2022.15.64.2.8
Ancuta Loredana Caraus
{"title":"The Concept of Burnout in the Medical Field: A Literature Review","authors":"Ancuta Loredana Caraus","doi":"10.31926/but.es.2022.15.64.2.8","DOIUrl":"https://doi.org/10.31926/but.es.2022.15.64.2.8","url":null,"abstract":"In this article we propose to carry out a review of the specialized literature with the aim of highlighting the main aspects regarding the concept of burnout, its typology, and the factors that generate it; all this information will be used to determine the managerial, sociological and psychological perspectives of the concept of burnout. Also, based on the information obtained through literature research, we aim to highlight managerial models applied in the medical field and the main legislative aspects that regulate them and make their management possible. The research brings additions to the specialized literature in Romania regarding the aspects related to the psychological state of medical staff and their relationship with patients.","PeriodicalId":53266,"journal":{"name":"Bulletin of the Transilvania University of Brasov Series V Economic Sciences","volume":"90 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73317686","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Models and Tools for Quality Approach in Public Administration in European Union 欧盟公共行政质量方法的模型与工具
Bulletin of the Transilvania University of Brasov Series V Economic Sciences Pub Date : 2022-12-22 DOI: 10.31926/but.es.2022.15.64.2.15
M. Popescu, L. Mândru
{"title":"Models and Tools for Quality Approach in Public Administration in European Union","authors":"M. Popescu, L. Mândru","doi":"10.31926/but.es.2022.15.64.2.15","DOIUrl":"https://doi.org/10.31926/but.es.2022.15.64.2.15","url":null,"abstract":"This paper focuses on the quality approach in public administration (PA) in the EU. The first section presents theoretical considerations on the modern approach to quality applicable in all areas of activity, including PA. The next two sections contain an overview of the policy and models on quality in PA promoted in the EU; the main measurement instruments and statistical data on the quality of government in the EU. The purpose of the study is to systematize information on the quality approach in the PA at the EU level, which will help academics, researchers and decision-makers better understand the quality models and tools currently used, and identify ways to improve them.","PeriodicalId":53266,"journal":{"name":"Bulletin of the Transilvania University of Brasov Series V Economic Sciences","volume":"4 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90194373","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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