A. Bourada, K. Bouarnouna, A. Boutra, Mahdi Benzema, Y. K. Benkahla
In this work, we study numerically a problem of mixed convection in lid driven square cavity, filled with air (Pr = 0.71), whose upper wall is movable and kept at constant cold temperature TC. The cavity contains a porous obstacle of height h and width b, placed on the middle of bottom wall which maintained at a constant hot temperature TH. The side walls are adiabatic. Darcy-Brinkmann model is used for modeling the momentum equations in porous medium. The Boussinesq assumption is used and the viscous dissipation is assumed to be negligible. This numerical study is based on the multiple-relaxation-time Lattice Boltzmann method (MRT-LBM). The D2Q9 two-dimensional model is adopted to the dynamic part, while the D2Q5 model is applied for the thermal part. The objective of the study is to analyze the effect of Darcy number (10−6≼ Da ≼ 10−1), Richardson number (0.01 ≼Ri≼ 103) and the aspect ratio w = b/H (0.2 ≼ w ≼ 1) on the hydrodynamic and thermal characteristics in the cavity through the velocity and temperature as well as the average Nusselt number. The results obtained show a considerable effect of these parameters on the structure of the flow and the heat transfer in the cavity, which can not be neglected.
{"title":"Numerical Simulation of Mixed Convection in a Lid Driven Cavity with Porous Obstacle Using (MRT-LBM)","authors":"A. Bourada, K. Bouarnouna, A. Boutra, Mahdi Benzema, Y. K. Benkahla","doi":"10.2139/ssrn.3373767","DOIUrl":"https://doi.org/10.2139/ssrn.3373767","url":null,"abstract":"In this work, we study numerically a problem of mixed convection in lid driven square cavity, filled with air (Pr = 0.71), whose upper wall is movable and kept at constant cold temperature T<sub>C</sub>. The cavity contains a porous obstacle of height h and width b, placed on the middle of bottom wall which maintained at a constant hot temperature TH. The side walls are adiabatic. Darcy-Brinkmann model is used for modeling the momentum equations in porous medium. The Boussinesq assumption is used and the viscous dissipation is assumed to be negligible. This numerical study is based on the multiple-relaxation-time Lattice Boltzmann method (MRT-LBM). The D2Q9 two-dimensional model is adopted to the dynamic part, while the D2Q5 model is applied for the thermal part. The objective of the study is to analyze the effect of Darcy number (10<sup>−6</sup>≼ Da ≼ 10<sup>−1</sup>), Richardson number (0.01 ≼Ri≼ 10<sup>3</sup>) and the aspect ratio w = b/H (0.2 ≼ w ≼ 1) on the hydrodynamic and thermal characteristics in the cavity through the velocity and temperature as well as the average Nusselt number. The results obtained show a considerable effect of these parameters on the structure of the flow and the heat transfer in the cavity, which can not be neglected.","PeriodicalId":414849,"journal":{"name":"ChemRN: Computational Materials Science (Topic)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123160424","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}
K. Sellami, N. Labsi, M. Feddaoui, Y. K. Benkahla, M. Najim
The present analysis is concerned with the effects of simultaneous heat and mass transfer phenomena on downward laminar flow of humid air in a vertical channel with isothermal wet walls using an elliptical formulation. The nonlinear partial differential equations describing the physical system was solved using the finite volume method implemented on a staggered mesh, the velocity-pressure coupling is processed by the SIMPLE algorithm. In this work, particular attention is paid to study the effect of the ambient conditions on evaporation rate of water. The major results show that the sensible heat is always transferred from the air to the walls; the latter must be heated when evaporation is important. In addition the evaporation rate increases noticeably with decrease of the Reynolds number and humidity of the inlet air.
{"title":"Numerical Study of Laminar Mixed Convection Heat and Mass Transfer with Phase Change in Vertical Channel","authors":"K. Sellami, N. Labsi, M. Feddaoui, Y. K. Benkahla, M. Najim","doi":"10.2139/ssrn.3372347","DOIUrl":"https://doi.org/10.2139/ssrn.3372347","url":null,"abstract":"The present analysis is concerned with the effects of simultaneous heat and mass transfer phenomena on downward laminar flow of humid air in a vertical channel with isothermal wet walls using an elliptical formulation. The nonlinear partial differential equations describing the physical system was solved using the finite volume method implemented on a staggered mesh, the velocity-pressure coupling is processed by the SIMPLE algorithm. In this work, particular attention is paid to study the effect of the ambient conditions on evaporation rate of water. The major results show that the sensible heat is always transferred from the air to the walls; the latter must be heated when evaporation is important. In addition the evaporation rate increases noticeably with decrease of the Reynolds number and humidity of the inlet air.","PeriodicalId":414849,"journal":{"name":"ChemRN: Computational Materials Science (Topic)","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115108540","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}
In this study, we are interested in comparing resultsof numerical simulations of flows in spillways obtained with two discretization methods, which are the finite element method (FEM) and the finite volume method (FVM). For this purpose, two numerical models based on these methods are used. The Navier-Stokes equations weresolved for an incompressible fluid with k-εturbulent model.The obtainedresultshave shown that the two methods led to same prediction of the free surface profiles. However, the computed velocity profiles are very similar in the case of spillways with low slopes, while noticeable differences appear and amplify when the slopes are inceased. The vertical velocity profiles in different sections show that the difference between theobtained results using the two numerical models is essentially near the wall.
{"title":"Finite Element and Finite Volume Method for Simulation of Free Surface Flows: Application to Spillways","authors":"F. Lebdiri, A. Seghir, A. Berreksi","doi":"10.2139/ssrn.3373179","DOIUrl":"https://doi.org/10.2139/ssrn.3373179","url":null,"abstract":"In this study, we are interested in comparing resultsof numerical simulations of flows in spillways obtained with two discretization methods, which are the finite element method (FEM) and the finite volume method (FVM). For this purpose, two numerical models based on these methods are used. The Navier-Stokes equations weresolved for an incompressible fluid with k-εturbulent model.The obtainedresultshave shown that the two methods led to same prediction of the free surface profiles. However, the computed velocity profiles are very similar in the case of spillways with low slopes, while noticeable differences appear and amplify when the slopes are inceased. The vertical velocity profiles in different sections show that the difference between theobtained results using the two numerical models is essentially near the wall.","PeriodicalId":414849,"journal":{"name":"ChemRN: Computational Materials Science (Topic)","volume":"102 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132453117","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}
Information technology since its inception has transformed beyond the thinking of humans and still in the phase. Internet is ubiquitous and has acquired space in every day to day life of humans either it is professional front or personal. Things are now smart enough and started communicating to each other and even it can be controlled from anywhere through internet. This world of internet has taken shape into the form of internet of things and is known with an abbreviation of IoT(Internet of Things).Basically the fundamental behind IoT initially is to tag the connected physical devices and detected by certain RFID devices. Heterogeneous devices are connected physically and empower these wireless attachments to show new capabilities, this review is an effort to clear the fundamentals, applications, issues and challenges pertaining to IoT.
信息技术自诞生以来，已经转变到超越人类思维的阶段。互联网无处不在，在人们的日常生活中无论是专业方面还是个人方面都占有一席之地。现在的事物足够智能，开始相互交流，甚至可以通过互联网从任何地方进行控制。这个互联网的世界已经形成了物联网的形式，并以IoT(internet of things)的缩写而闻名。基本上，物联网背后的基础最初是标记连接的物理设备，并由某些RFID设备检测。异构设备是物理连接的，并赋予这些无线附件以新的功能，本审查旨在澄清与物联网相关的基础、应用、问题和挑战。
{"title":"Internet of Things its Components, Applications, Issues and Challenges from Future Perspective and Scope: A Review","authors":"K. K. Sethi, P. Bhanodia, N. Singh, Ajay Khatri","doi":"10.2139/ssrn.3351000","DOIUrl":"https://doi.org/10.2139/ssrn.3351000","url":null,"abstract":"Information technology since its inception has transformed beyond the thinking of humans and still in the phase. Internet is ubiquitous and has acquired space in every day to day life of humans either it is professional front or personal. Things are now smart enough and started communicating to each other and even it can be controlled from anywhere through internet. This world of internet has taken shape into the form of internet of things and is known with an abbreviation of IoT(Internet of Things).Basically the fundamental behind IoT initially is to tag the connected physical devices and detected by certain RFID devices. Heterogeneous devices are connected physically and empower these wireless attachments to show new capabilities, this review is an effort to clear the fundamentals, applications, issues and challenges pertaining to IoT.","PeriodicalId":414849,"journal":{"name":"ChemRN: Computational Materials Science (Topic)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129556831","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}
Abstract A 3D mesoscopic envelope model is used to numerically simulate the experimental X-ray observations of isothermal equiaxed dendritic solidification of a thin sample of Al-20 wt % Cu alloy. We show the evolution of the system composed of multiple grains growing under influence of strong solutal interactions. We emphasize the three-dimensional effects in the thin sample thickness on the growth kinetics, focusing on three aspects: (i) the impact of the third dimension on the solute diffusion, (ii) the influence of the orientation of the preferential grain growth directions on the interactions with the confining sample walls, and (iii) the influence of the grain position along the sample thickness. We demonstrate the importance of considering the three-dimensional structure of the thin samples despite the small thickness. We further show that the mesoscopic envelope model can accurately describe the shape and the time-evolution of the equiaxed grains growing under influence of strong solutal interactions.
{"title":"Quantitative 3D Mesoscopic Modeling of Grain Interactions During Equiaxed Dendritic Solidification in a Thin Sample","authors":"A. Olmedilla, M. Založnik, H. Combeau","doi":"10.2139/ssrn.3314055","DOIUrl":"https://doi.org/10.2139/ssrn.3314055","url":null,"abstract":"Abstract A 3D mesoscopic envelope model is used to numerically simulate the experimental X-ray observations of isothermal equiaxed dendritic solidification of a thin sample of Al-20 wt % Cu alloy. We show the evolution of the system composed of multiple grains growing under influence of strong solutal interactions. We emphasize the three-dimensional effects in the thin sample thickness on the growth kinetics, focusing on three aspects: (i) the impact of the third dimension on the solute diffusion, (ii) the influence of the orientation of the preferential grain growth directions on the interactions with the confining sample walls, and (iii) the influence of the grain position along the sample thickness. We demonstrate the importance of considering the three-dimensional structure of the thin samples despite the small thickness. We further show that the mesoscopic envelope model can accurately describe the shape and the time-evolution of the equiaxed grains growing under influence of strong solutal interactions.","PeriodicalId":414849,"journal":{"name":"ChemRN: Computational Materials Science (Topic)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-01-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114829559","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}
S. Thakur, S. K. Mohapatra, P. Pathak, D. Roy, C. Mishra
Cold Rolling Mill (CRM) complex of Rourkela Steel Plant (RSP) was set up in 1968. The CRM has two pickling lines which use sulphuric acid as pickling medium. Under-pickling is inherent problem with sulphuric acid pickling line. Under-pickled coils processed at tandem mill leads to contamination of emulsion leading to increased roll wear and poor surface quality of cold rolled coils. Also, the deficient roll cooling system aggravates the situation, leading to higher occurrence of strip breakage and inferior shape of the coils. Technological measures were taken both at the Pickling Line and at the Tandem Mill to improve their operating conditions. These measures include introduction of improved scale washing system at Pickling Line and heat exchanger in acid regeneration plant to improve pickling bath condition. New generation ‘tantalum shell and tube heat exchanger’ introduced in pickling lines to reduce the under-pickling. Roll cooling system at Tandem Mill was modified to reduce thermal- crown of work rolls, which helped in reduction in roll wear by 20%. With these measures, diversion of CR coils due to bad shape reduce by 30%.
Electrical grade of steel produced at Silicon Steel Mill (SSM) is one of the major revenue- earners for RSP. Electrical steel is cold rolled in four high cold reversing mill at SSM. The thermal crown of the work rolls in the mill found to be high, leading to higher specific roll consumption, lower campaign size and poor surface quality of electrical steel rolled in this mill. A modified roll cooling system with differential flow density along the work roll barrel in accordance to the roll thermal profile was introduced at reversing mill to improve shape of the cold rolled coils. The headers have been divided into three zones depending on the intensity of the cooling required with the central zone having the highest flow density followed by the intermediate and the end zones. A self-cleaning wedge type auto filter capable of filtration of 300 micron level was introduced for supply of continuous emulsion flow to roll cooling headers. The improved roll cooling system has led to reduction in roll wear and the specific roll consumption has reduced by 20%.
{"title":"Reduction in Roll Wear Through Technological Interventions at CRM & SSM of Rourkela Steel Plant","authors":"S. Thakur, S. K. Mohapatra, P. Pathak, D. Roy, C. Mishra","doi":"10.2139/ssrn.3349080","DOIUrl":"https://doi.org/10.2139/ssrn.3349080","url":null,"abstract":"Cold Rolling Mill (CRM) complex of Rourkela Steel Plant (RSP) was set up in 1968. The CRM has two pickling lines which use sulphuric acid as pickling medium. Under-pickling is inherent problem with sulphuric acid pickling line. Under-pickled coils processed at tandem mill leads to contamination of emulsion leading to increased roll wear and poor surface quality of cold rolled coils. Also, the deficient roll cooling system aggravates the situation, leading to higher occurrence of strip breakage and inferior shape of the coils. Technological measures were taken both at the Pickling Line and at the Tandem Mill to improve their operating conditions. These measures include introduction of improved scale washing system at Pickling Line and heat exchanger in acid regeneration plant to improve pickling bath condition. New generation ‘tantalum shell and tube heat exchanger’ introduced in pickling lines to reduce the under-pickling. Roll cooling system at Tandem Mill was modified to reduce thermal- crown of work rolls, which helped in reduction in roll wear by 20%. With these measures, diversion of CR coils due to bad shape reduce by 30%.<br><br>Electrical grade of steel produced at Silicon Steel Mill (SSM) is one of the major revenue- earners for RSP. Electrical steel is cold rolled in four high cold reversing mill at SSM. The thermal crown of the work rolls in the mill found to be high, leading to higher specific roll consumption, lower campaign size and poor surface quality of electrical steel rolled in this mill. A modified roll cooling system with differential flow density along the work roll barrel in accordance to the roll thermal profile was introduced at reversing mill to improve shape of the cold rolled coils. The headers have been divided into three zones depending on the intensity of the cooling required with the central zone having the highest flow density followed by the intermediate and the end zones. A self-cleaning wedge type auto filter capable of filtration of 300 micron level was introduced for supply of continuous emulsion flow to roll cooling headers. The improved roll cooling system has led to reduction in roll wear and the specific roll consumption has reduced by 20%.<br>","PeriodicalId":414849,"journal":{"name":"ChemRN: Computational Materials Science (Topic)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128047106","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}
Blind people are significantly more likely to experience unfair treatment at work compared to others. Almost all the blind people find it difficult to do their daily work; it also takes extra time and effort for them to perform their daily work and activities. It is difficult for the blind person to cope up with their normal life. Visionary Glass is a project made for the blind people. With this project ‘Visionary Glass’, will help the blind people to read text. A camera will be attached to the glasses of a blind person, through that camera images will be captured and sent to the microcontroller. And the audio output of OCR performed on the captured image will be received by the blind person. Visionary Glass is a solution to the society needs, since the current state does not fulfill the needs of blind people. Visionary Glass is a new concept that solves some of the problems faced by blind people in their day to day lives.
{"title":"Visionary Glass","authors":"Prashant R. Avhad, Vaishali Gaikwad (Mohite)","doi":"10.2139/ssrn.3274635","DOIUrl":"https://doi.org/10.2139/ssrn.3274635","url":null,"abstract":"Blind people are significantly more likely to experience unfair treatment at work compared to others. Almost all the blind people find it difficult to do their daily work; it also takes extra time and effort for them to perform their daily work and activities. It is difficult for the blind person to cope up with their normal life. Visionary Glass is a project made for the blind people. With this project ‘Visionary Glass’, will help the blind people to read text. A camera will be attached to the glasses of a blind person, through that camera images will be captured and sent to the microcontroller. And the audio output of OCR performed on the captured image will be received by the blind person. Visionary Glass is a solution to the society needs, since the current state does not fulfill the needs of blind people. Visionary Glass is a new concept that solves some of the problems faced by blind people in their day to day lives.","PeriodicalId":414849,"journal":{"name":"ChemRN: Computational Materials Science (Topic)","volume":"81 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127177640","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}
Zaer S. Abo-Hammour, Malek Alkayyali, Hussam J. Khasawneh, Mohammad I. Al Saaideh
In the recent years, using the fractional calculus has been increased in the applications of control engineering.This paper presents an Integer and Fractional PID controllers designed using particle swarm optimization technique for two different industrial applications, the first one is the heat solid. The simulation results show that the Integer PID controller can behave as well as the fractional PID controller if the parameters are well tuned.
{"title":"On the Design of the Integer and Fractional PID Controllers Using Particle Swarm Optimization","authors":"Zaer S. Abo-Hammour, Malek Alkayyali, Hussam J. Khasawneh, Mohammad I. Al Saaideh","doi":"10.2139/ssrn.3277839","DOIUrl":"https://doi.org/10.2139/ssrn.3277839","url":null,"abstract":"In the recent years, using the fractional calculus has been increased in the applications of control engineering.This paper presents an Integer and Fractional PID controllers designed using particle swarm optimization technique for two different industrial applications, the first one is the heat solid. The simulation results show that the Integer PID controller can behave as well as the fractional PID controller if the parameters are well tuned.","PeriodicalId":414849,"journal":{"name":"ChemRN: Computational Materials Science (Topic)","volume":"73 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124493572","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}
The Rural Remote Broadband Systems (RRBS) program is a unique Canadian initiative to provide broadband access to unserved and underserved regions via fixed wireless service operating on unassigned television frequencies in the 512-608 MHz and 614-698 MHz bands. RRBS operators pay a nominal annual fee to access spectrum and receive a secondary license that offers no guarantee of protection from interference from broadcasting services.In 2011, the year the program was launched, Industry Canada issued 555 licenses for RRBS operations across the country. By 2014, there were 84 RRBS stations in Canada, the majority of which were concentrated in the province of Alberta. In December 2014, Industry Canada placed a moratorium on granting more spectrum licenses for RRBS operations while it examined the potentials of repurposing the 600 MHz band. As of August 2015, there were 52 RRBS stations operating in Canada.This study’s objective is to evaluate the RRBS policy as a method to bring efficient and affordable wireless internet service to remote and rural regions of Canada. This research looks at service providers at the margins of the Canadian wireless industry. Most RRBS providers in Canada are small enterprises that are often run by a few individuals and can have customer bases of less than one hundred. Despite the limited economic potential, early results show RRBS providers remain positive about its possibilities, if given the necessary policy support. This project explores the development of these small enterprises, RRBS business practices, as well as the continued role of the Canadian federal government in developing broadband infrastructures in remote and rural areas. The results of the study include quantitative data collected via surveys of RRBS service providers across Canada, and qualitative information obtained via structured interviews.Among the key questions: What precipitated the enormous drop in interested RRBS providers between 2011 and 2014? Can a secondary licence offer reliable service? Why are so many RRBS providers concentrated in the province of Alberta? What is the role of the federal government in supporting the development of small wireless providers? Is there a viable economic model to provide wireless broadband service in remote regions?This research is the only known study of this unique Canadian wireless broadband initiative. This study contributes to international telecommunication research involving Television White Space and unlicensed spectrum. It will prove valuable for any country with a large hinterland where wired access is a challenge.
{"title":"Remote Rural Broadband Systems in Canada","authors":"G. Taylor","doi":"10.2139/ssrn.3357266","DOIUrl":"https://doi.org/10.2139/ssrn.3357266","url":null,"abstract":"The Rural Remote Broadband Systems (RRBS) program is a unique Canadian initiative to provide broadband access to unserved and underserved regions via fixed wireless service operating on unassigned television frequencies in the 512-608 MHz and 614-698 MHz bands. RRBS operators pay a nominal annual fee to access spectrum and receive a secondary license that offers no guarantee of protection from interference from broadcasting services.In 2011, the year the program was launched, Industry Canada issued 555 licenses for RRBS operations across the country. By 2014, there were 84 RRBS stations in Canada, the majority of which were concentrated in the province of Alberta. In December 2014, Industry Canada placed a moratorium on granting more spectrum licenses for RRBS operations while it examined the potentials of repurposing the 600 MHz band. As of August 2015, there were 52 RRBS stations operating in Canada.This study’s objective is to evaluate the RRBS policy as a method to bring efficient and affordable wireless internet service to remote and rural regions of Canada. This research looks at service providers at the margins of the Canadian wireless industry. Most RRBS providers in Canada are small enterprises that are often run by a few individuals and can have customer bases of less than one hundred. Despite the limited economic potential, early results show RRBS providers remain positive about its possibilities, if given the necessary policy support. This project explores the development of these small enterprises, RRBS business practices, as well as the continued role of the Canadian federal government in developing broadband infrastructures in remote and rural areas. The results of the study include quantitative data collected via surveys of RRBS service providers across Canada, and qualitative information obtained via structured interviews.Among the key questions: What precipitated the enormous drop in interested RRBS providers between 2011 and 2014? Can a secondary licence offer reliable service? Why are so many RRBS providers concentrated in the province of Alberta? What is the role of the federal government in supporting the development of small wireless providers? Is there a viable economic model to provide wireless broadband service in remote regions?This research is the only known study of this unique Canadian wireless broadband initiative. This study contributes to international telecommunication research involving Television White Space and unlicensed spectrum. It will prove valuable for any country with a large hinterland where wired access is a challenge.","PeriodicalId":414849,"journal":{"name":"ChemRN: Computational Materials Science (Topic)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134283198","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 : 2016-10-24DOI: 10.33844/ijol.2018.60289
R. Nasiri, Ali Molla Hosseini, S. Salajegheh, Ayyub Sheikhy
Human resources number of important factor and based organizational. Preparation this resource for faced with changes is of particular importance and of organization must in each mission allocated most capital, time and program. The solution to this problem, many organizations have recognized empowerment programs and tried to provide ground for nurturing staff. The relationship between individual and organizational factors in the institute of communications and information technology, the relationship between psychological empowerment responsibilities and not licensed, but the relationship between self-esteem, creativity and internal locus of control and psychological empowerment is confirmed. Relations between all factors include: clarity to goals, access to information, and access to resources, training and the provision of treatment with psychological empowerment is confirmed. Moreover, the relationship between psychological empowerment of human resources productivity showed the effects of lateral relations between all dimension of (including: significance, suitability, effectiveness, autonomy and trust) the effects of productivity is confirmed.
{"title":"Review of the Individual and Organizational Factors Related to Human Resource Empowerment and Designing an Optimal Model to Promote Manifestations of Productivity","authors":"R. Nasiri, Ali Molla Hosseini, S. Salajegheh, Ayyub Sheikhy","doi":"10.33844/ijol.2018.60289","DOIUrl":"https://doi.org/10.33844/ijol.2018.60289","url":null,"abstract":"Human resources number of important factor and based organizational. Preparation this resource for faced with changes is of particular importance and of organization must in each mission allocated most capital, time and program. The solution to this problem, many organizations have recognized empowerment programs and tried to provide ground for nurturing staff. The relationship between individual and organizational factors in the institute of communications and information technology, the relationship between psychological empowerment responsibilities and not licensed, but the relationship between self-esteem, creativity and internal locus of control and psychological empowerment is confirmed. Relations between all factors include: clarity to goals, access to information, and access to resources, training and the provision of treatment with psychological empowerment is confirmed. Moreover, the relationship between psychological empowerment of human resources productivity showed the effects of lateral relations between all dimension of (including: significance, suitability, effectiveness, autonomy and trust) the effects of productivity is confirmed.","PeriodicalId":414849,"journal":{"name":"ChemRN: Computational Materials Science (Topic)","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123926900","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：