Pub Date : 2022-12-01DOI: 10.24193/subbmath.2022.4.08
Y. Letoufa, H. Benseridi, Tedjani Hadj Ammar
"In this paper we consider the dynamic system for Bingham fluid in a three-dimensional thin domain with Fourier and Tresca boundary condition. We study the existence and uniqueness results for the weak solution, then we establish its asymptotic behavior, when the depth of the thin domain tends to zero. This study yields a mechanical laws that give a new description of the behavior this system."
{"title":"Unsteady flow of Bingham fluid in a thin layer with mixed boundary conditions","authors":"Y. Letoufa, H. Benseridi, Tedjani Hadj Ammar","doi":"10.24193/subbmath.2022.4.08","DOIUrl":"https://doi.org/10.24193/subbmath.2022.4.08","url":null,"abstract":"\"In this paper we consider the dynamic system for Bingham fluid in a three-dimensional thin domain with Fourier and Tresca boundary condition. We study the existence and uniqueness results for the weak solution, then we establish its asymptotic behavior, when the depth of the thin domain tends to zero. This study yields a mechanical laws that give a new description of the behavior this system.\"","PeriodicalId":30022,"journal":{"name":"Studia Universitatis BabesBolyai Geologia","volume":"52 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85420583","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}
Pub Date : 2022-12-01DOI: 10.2478/subboec-2022-0012
Codruța Osoian, Anamaria Petre
Abstract This paper explores the relationship between engagement and job burnout perceived by teleworking employees. The theoretical framework of this paper explains the concepts of telework, work engagement, and job burnout, but also the relationships between these variables. Telework is a “new reality” for many employees, and in this new work context, engagement and burnout must be investigated, especially for entry level employees. We analyzed the relationship between engagement and telework, respectively burnout and telework based on a questionnaire. The results reveal a positive relationship between engagement and telework and a negative correlation between burnout and telework. The research results also show that burnout has a high level among telework employees, and exhaustion is the most pronounced problem.
{"title":"Employee Engagement and Job Burnout in the Context of Teleworking","authors":"Codruța Osoian, Anamaria Petre","doi":"10.2478/subboec-2022-0012","DOIUrl":"https://doi.org/10.2478/subboec-2022-0012","url":null,"abstract":"Abstract This paper explores the relationship between engagement and job burnout perceived by teleworking employees. The theoretical framework of this paper explains the concepts of telework, work engagement, and job burnout, but also the relationships between these variables. Telework is a “new reality” for many employees, and in this new work context, engagement and burnout must be investigated, especially for entry level employees. We analyzed the relationship between engagement and telework, respectively burnout and telework based on a questionnaire. The results reveal a positive relationship between engagement and telework and a negative correlation between burnout and telework. The research results also show that burnout has a high level among telework employees, and exhaustion is the most pronounced problem.","PeriodicalId":30022,"journal":{"name":"Studia Universitatis BabesBolyai Geologia","volume":"30 1","pages":"14 - 26"},"PeriodicalIF":0.0,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84971403","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}
Pub Date : 2022-12-01DOI: 10.24193/subbmath.2022.4.01
S. Kermausuor, E. Nwaeze
"In this work, we establish some new midpoint and trapezoidal type inequalities for prequasiinvex functions via the Katugampola fractional integrals. Some of the results obtained in this paper are generalizations of some earlier results in the literature."
{"title":"New midpoint and trapezoidal-type inequalities for prequasiinvex functions via generalized fractional integrals","authors":"S. Kermausuor, E. Nwaeze","doi":"10.24193/subbmath.2022.4.01","DOIUrl":"https://doi.org/10.24193/subbmath.2022.4.01","url":null,"abstract":"\"In this work, we establish some new midpoint and trapezoidal type inequalities for prequasiinvex functions via the Katugampola fractional integrals. Some of the results obtained in this paper are generalizations of some earlier results in the literature.\"","PeriodicalId":30022,"journal":{"name":"Studia Universitatis BabesBolyai Geologia","volume":"283 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76826806","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}
Pub Date : 2022-12-01DOI: 10.24193/subbmath.2022.4.05
H. Mahzoon
"Let $mathcal{S}^*_e$ and $mathcal{S}^*_B$ denote the class of analytic functions $f$ in the open unit disc normalized by $f(0)=0=f'(0)-1$ and satisfying, respectively, the following subordination relations: $$ frac{zf'(z)}{f(z)}prec e^zquad{rm and}quadfrac{zf'(z)}{f(z)}prec e^{e^z-1}.$$ In this article, we investigate majorization problems for the classes $mathcal{S}^*_e$ and $mathcal{S}^*_B$ without acting upon any linear or nonlinear operators."
{"title":"Majorization problems for certain starlike functions associated with the exponential function","authors":"H. Mahzoon","doi":"10.24193/subbmath.2022.4.05","DOIUrl":"https://doi.org/10.24193/subbmath.2022.4.05","url":null,"abstract":"\"Let $mathcal{S}^*_e$ and $mathcal{S}^*_B$ denote the class of analytic functions $f$ in the open unit disc normalized by $f(0)=0=f'(0)-1$ and satisfying, respectively, the following subordination relations: $$ frac{zf'(z)}{f(z)}prec e^zquad{rm and}quadfrac{zf'(z)}{f(z)}prec e^{e^z-1}.$$ In this article, we investigate majorization problems for the classes $mathcal{S}^*_e$ and $mathcal{S}^*_B$ without acting upon any linear or nonlinear operators.\"","PeriodicalId":30022,"journal":{"name":"Studia Universitatis BabesBolyai Geologia","volume":"33 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77056464","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}
Pub Date : 2022-12-01DOI: 10.24193/subbmath.2022.4.11
Amar Ouaoua, A. Khaldi, M. Maouni
"In this paper, we consider a nonlinear $p-$Kirchhoff type hyperbolic equation with damping and source terms $$u_{tt}-Mleft( underset{Omega }{int }leftvert nabla urightvert ^{p}dxright) Delta _{p}u+leftvert u_{t}rightvert ^{m-2}u_{t}=leftvert urightvert ^{r-2}u.$$ Under suitable assumptions and positive initial energy, we prove the global existence of solution by using the potential energy and Nehari's functionals. Finally, the stability of equation is established based on Komornik's integral inequality."
{"title":"Global existence and stability of solution for a p-Kirchhoff type hyperbolic equation with damping and source terms","authors":"Amar Ouaoua, A. Khaldi, M. Maouni","doi":"10.24193/subbmath.2022.4.11","DOIUrl":"https://doi.org/10.24193/subbmath.2022.4.11","url":null,"abstract":"\"In this paper, we consider a nonlinear $p-$Kirchhoff type hyperbolic equation with damping and source terms $$u_{tt}-Mleft( underset{Omega }{int }leftvert nabla urightvert ^{p}dxright) Delta _{p}u+leftvert u_{t}rightvert ^{m-2}u_{t}=leftvert urightvert ^{r-2}u.$$ Under suitable assumptions and positive initial energy, we prove the global existence of solution by using the potential energy and Nehari's functionals. Finally, the stability of equation is established based on Komornik's integral inequality.\"","PeriodicalId":30022,"journal":{"name":"Studia Universitatis BabesBolyai Geologia","volume":"21 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91217658","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}
Pub Date : 2022-12-01DOI: 10.24193/subbmath.2022.4.15
Nadhir Chougui
"In this paper we study the process of bilateral contact with adhesion and friction between a piezoelectric body and an insulator obstacle, the socalled foundation. The material's behavior is assumed to be electro-viscoelastic- viscoplastic; the process is quasistatic, the contact is modeled by a general non-local friction law with adhesion. The adhesion process is modeled by a bonding field on the contact surface. We derive a variational formulation for the problem and then, under a smallness assumption on the coe cient of friction, we prove the existence of a unique weak solution to the model. The proofs are based on a general results on elliptic variational inequalities and fixed point arguments."
{"title":"Analysis of quasistatic viscoelastic viscoplastic piezoelectric contact problem with friction and adhesion","authors":"Nadhir Chougui","doi":"10.24193/subbmath.2022.4.15","DOIUrl":"https://doi.org/10.24193/subbmath.2022.4.15","url":null,"abstract":"\"In this paper we study the process of bilateral contact with adhesion and friction between a piezoelectric body and an insulator obstacle, the socalled foundation. The material's behavior is assumed to be electro-viscoelastic- viscoplastic; the process is quasistatic, the contact is modeled by a general non-local friction law with adhesion. The adhesion process is modeled by a bonding field on the contact surface. We derive a variational formulation for the problem and then, under a smallness assumption on the coe cient of friction, we prove the existence of a unique weak solution to the model. The proofs are based on a general results on elliptic variational inequalities and fixed point arguments.\"","PeriodicalId":30022,"journal":{"name":"Studia Universitatis BabesBolyai Geologia","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88932408","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}
Pub Date : 2022-12-01DOI: 10.24193/subbmath.2022.4.03
M. Helal
"In this paper we investigate the existence of solutions of initial value problems (IVP for short), for partial hyperbolic functional and neutral differential inclusions of fractional order involving Caputo fractional derivative with finite delay by using the nonlinear alternative of Frigon type for multivalued admissible contraction in Frechet spaces."
{"title":"Darboux problem for fractional partial hyperbolic di erential inclusions on unbounded domains with delay","authors":"M. Helal","doi":"10.24193/subbmath.2022.4.03","DOIUrl":"https://doi.org/10.24193/subbmath.2022.4.03","url":null,"abstract":"\"In this paper we investigate the existence of solutions of initial value problems (IVP for short), for partial hyperbolic functional and neutral differential inclusions of fractional order involving Caputo fractional derivative with finite delay by using the nonlinear alternative of Frigon type for multivalued admissible contraction in Frechet spaces.\"","PeriodicalId":30022,"journal":{"name":"Studia Universitatis BabesBolyai Geologia","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77973611","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}
Pub Date : 2022-12-01DOI: 10.24193/subbmath.2022.4.10
D. Ouchenane, Zineb Khalili, F. Yazid
"In this article we consider a coupled system of nonlinear Klein-Gordon equations with degenerate damping and source terms. We prove, with positive initial energy, the global nonexistence of solutions by concavity method."
{"title":"Global nonexistence of solution for coupled nonlinear Klein-Gordon with degenerate damping and source terms","authors":"D. Ouchenane, Zineb Khalili, F. Yazid","doi":"10.24193/subbmath.2022.4.10","DOIUrl":"https://doi.org/10.24193/subbmath.2022.4.10","url":null,"abstract":"\"In this article we consider a coupled system of nonlinear Klein-Gordon equations with degenerate damping and source terms. We prove, with positive initial energy, the global nonexistence of solutions by concavity method.\"","PeriodicalId":30022,"journal":{"name":"Studia Universitatis BabesBolyai Geologia","volume":"45 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75517152","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}
Pub Date : 2022-12-01DOI: 10.2478/subboec-2022-0013
N. Papalexandris
Abstract The link between sustainable development and human resource management (HRM) has been only recently widely established in the literature. Systematic studies are available but there is a wide range of interpretations and several overlapping terms that often cause confusion to practitioners. HRM practices included in the CSR Programs of a company are often linked with sustainability, business ethics and workplace justice and are often under the terms of sustainable HRM. It is well recognized that HR can play a critical role in enhancing corporate sustainability through policies and practices that benefit its people and society in general and that all these initiatives must be documented and reported to gain visibility and credibility. Lately great emphasis has been placed on the U.N. Sustainable Development Goals (SDGs) and the dimensions of the Environment, Society and Governance (ESG) which form the criteria for documenting and reporting relevant practices implemented by business firms. HRM can play an important role in designing and implementing such practices, especially those linked to society. This paper presents the notion of Sustainable Development, its increasing importance for companies and its link with Human Resource Management. (HRM). It describes and clarifies Sustainable Development Goals (SDGs), their history and the three pillars e.g., Environment, Society and Governance (ESG) which form the basic criteria for organizations to implement and report relevant practices in order to prove their involvement in sustainability. Third, the paper presents the concept of Sustainable HRM, and Sustainable practices implemented by companies in Greece following the 2010 economic crisis and the need for reporting them mainly under the social dimension of the ESG Criteria. To stress the need for the involvement of HRM in sustainability in order to enhance its ethical profile, expand its agenda and improve its role as a strategic partner and a source of competitive advantage.
{"title":"Sustainable Development and the Critical Role of HRM","authors":"N. Papalexandris","doi":"10.2478/subboec-2022-0013","DOIUrl":"https://doi.org/10.2478/subboec-2022-0013","url":null,"abstract":"Abstract The link between sustainable development and human resource management (HRM) has been only recently widely established in the literature. Systematic studies are available but there is a wide range of interpretations and several overlapping terms that often cause confusion to practitioners. HRM practices included in the CSR Programs of a company are often linked with sustainability, business ethics and workplace justice and are often under the terms of sustainable HRM. It is well recognized that HR can play a critical role in enhancing corporate sustainability through policies and practices that benefit its people and society in general and that all these initiatives must be documented and reported to gain visibility and credibility. Lately great emphasis has been placed on the U.N. Sustainable Development Goals (SDGs) and the dimensions of the Environment, Society and Governance (ESG) which form the criteria for documenting and reporting relevant practices implemented by business firms. HRM can play an important role in designing and implementing such practices, especially those linked to society. This paper presents the notion of Sustainable Development, its increasing importance for companies and its link with Human Resource Management. (HRM). It describes and clarifies Sustainable Development Goals (SDGs), their history and the three pillars e.g., Environment, Society and Governance (ESG) which form the basic criteria for organizations to implement and report relevant practices in order to prove their involvement in sustainability. Third, the paper presents the concept of Sustainable HRM, and Sustainable practices implemented by companies in Greece following the 2010 economic crisis and the need for reporting them mainly under the social dimension of the ESG Criteria. To stress the need for the involvement of HRM in sustainability in order to enhance its ethical profile, expand its agenda and improve its role as a strategic partner and a source of competitive advantage.","PeriodicalId":30022,"journal":{"name":"Studia Universitatis BabesBolyai Geologia","volume":"4 1","pages":"27 - 36"},"PeriodicalIF":0.0,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90769978","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}
Pub Date : 2022-12-01DOI: 10.24193/subbmath.2022.4.12
X. Krasniqi
"In this paper we have proved a theorem which show the degree of approximation of periodic functions by some generalized means of their Fourier series. In addition, our result is extended to two-dimensional setting as well."
{"title":"Applications of the deferred generalized de la Vallee Poussin means in approximation of continuous functions","authors":"X. Krasniqi","doi":"10.24193/subbmath.2022.4.12","DOIUrl":"https://doi.org/10.24193/subbmath.2022.4.12","url":null,"abstract":"\"In this paper we have proved a theorem which show the degree of approximation of periodic functions by some generalized means of their Fourier series. In addition, our result is extended to two-dimensional setting as well.\"","PeriodicalId":30022,"journal":{"name":"Studia Universitatis BabesBolyai Geologia","volume":"41 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86934665","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}
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