scholarly journals DISPERSION COMPENSATION USING ELECTRONIC METHODS BROADCASTING SYSTEM

2021 ◽  
Vol 7 (1) ◽  
pp. 33-38
Author(s):  
Augustin Vyukusenge ◽  
Keyword(s):  
Communication Systems ◽  
Information Transfer ◽  
High Speed ◽  
Fiber Optic ◽  
Coherent Detection ◽  
Processing Unit ◽  
Quality Of Information ◽  
Transmission Systems ◽  
The Impact

System distortions due to chromatic dispersion (CD), polarization mode dispersion (PMD), laser phase noise and fiber nonlinearities have a significant impact on the performance of high-speed fiber optic networks. In connection with the need to improve the quality of information transmission in high-speed fiber-optic communication systems, coherent detection with a digital signal processing unit is of particular interest. The main goal of the DSP block is to reduce the impact of linear and nonlinear effects that degrade the quality of information transfer. In this direction, the use of adaptive filters with adaptation algorithms for filter coefficients plays an important role. The Constant Modulus Algorithm (CMA) and the Least Mean Square (LMS) method used to compensate for dispersion distortions are presented. The load on transport networks based on fiber-optic transmission systems is increasing at an accelerating rate. This paper discusses the possibility and limitations of increasing the throughput of fiber-optic transmission systems by reducing the distance between carriers. A comparison is made between fixed and flexible grids in terms of the spectral bandwidth efficiency. It is concluded that the use of flexible mesh technology is promising when switching to channel speeds above 100 Gbit/s.

scholarly journals Transportation Infrastructure Construction and High-Quality Development of Enterprises: Evidence from the Quasi-Natural Experiment of High-Speed Railway Opening in China

2021 ◽  
Vol 13 (23) ◽  
pp. 13316
Author(s):  
Tianjiao Zhao ◽  
Xiang Xiao ◽  
Qinghui Dai
Keyword(s):  
Information Disclosure ◽  
High Speed ◽  
Natural Experiment ◽  
Quality Development ◽  
High Quality ◽  
Quality Of Information ◽  
High Speed Railway ◽  
Business Environments ◽  
The Impact

High-quality development of the economy is an important guarantee for economic and business sustainability, and the construction of transportation infrastructure is an important channel to achieving high-quality development. Thus, we take the opening of China’s high-speed railway (HSR) as a quasi-natural experiment and use the difference-in-difference model to explore the impact and mechanism of HSR on firms’ high-quality development. By using the total factor productivity of enterprises as the proxy for high-quality development, the empirical results show that: (1) the opening of the HSR can significantly promote high-quality development of enterprises; (2) the quality of information disclosure plays a mediating role in such relationships; and (3) the impact of HSR on enterprises’ high-quality development is more significant for enterprises that are located in cities with better business environments. Overall, this research indicates that local infrastructure construction is an important factor to achieve high-quality development of enterprises as well as economic sustainability that cannot be ignored, and this conclusion will be helpful for corporate managers in enhancing the quality of information disclosure, as well as for local governments to attach more importance to optimizing business environments to achieve high-quality development and economic sustainability.

Impact of embodiment on attitude strength

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Sunaina Shrivastava ◽  
Gaurav Jain ◽  
JaeHwan Kwon ◽  
Dhananjay Nayakankuppam
Keyword(s):  
Undergraduate Students ◽  
Cognitive Process ◽  
Target Object ◽  
Attitude Strength ◽  
Quality Of Information ◽  
Content Type ◽  
Lab Experiments ◽  
Attitude Accessibility ◽  
The Impact

Purpose Traditionally, it has been held that strong attitudes are a result of the conscious cognitive process of elaboration where one engages in effortful issue-relevant thinking. The purpose of this study is to show that attitude strength can follow from processes not just limited to elaboration – as a function of certain embodied states. This study examines bodily manipulations that could alter perceptions about the quality of the information describing a target (e.g. notion of “hard/soft” evidence), and, find that such an embodiment leads one to have strong attitudes toward the target object. This study proposes an attitude-rehearsal-based mechanism to explain the phenomenon. Design/methodology/approach This study have relied on lab experiments as a methodology – undergraduate students and American residents served as participants. This study have conducted a pre-registered study as well. Findings In the work, the study shows that strong attitudes can result from processes not just limited to elaboration, as a function of certain embodied states. This paper examines bodily manipulations that could alter perceptions about the quality of information describing the target (e.g. notion of “hard vs soft”; “converging vs diverging” information), and, find that such an embodiment leads one to have strong attitudes toward the target. This study consistently observed that the bodily manipulations influence attitude accessibility, a direct and operational indicator of attitude strength. This study further validates an attitude-rehearsal-based mechanism to explain the observed phenomenon. Originality/value While much work has investigated the impact of embodiment on attitudes, little attention has been paid to whether, and, how embodied states can impact the “strength” of the attitude without impacting the attitude itself – to the knowledge, this paper is the first to document this. Moreover, traditionally, it has been held that strong attitudes are a result of the conscious cognitive process of elaboration where one engages in effortful issue-relevant thinking. This study however shows that attitude strength can follow from processes not just limited to elaboration – as a function of certain embodied states.

THE DESIGN AND FABRICATION OF HIGH-SPEED HBT CIRCUITS FOR FIBER-OPTIC COMMUNICATION SYSTEMS

1994 ◽  
Vol 05 (03) ◽  
pp. 253-274 ◽  
Author(s):  
MASAO OBARA ◽  
JUNKO AKAGI
Keyword(s):  
Measurement System ◽  
Communication Systems ◽  
High Speed ◽  
Fiber Optic ◽  
Heterojunction Bipolar Transistor ◽  
Fiber Amplifiers ◽  
Speed Measurement ◽  
Fiber Optic Communication ◽  
Optical Fiber Amplifiers ◽  
Optic Communication

AlGaAs/GaAs heterojunction bipolar transistor (HBT) high speed ICs have been paving the way for the most sophisticated fiber-optic communication systems since the late 1980s. Recently 20 Gbps HBT ICs have been developed to accommodate the emergence of optical fiber amplifiers. HBT technology is now proceeding towards the development of 40 Gbps systems where the lack of high speed measurement system remains an issue.

scholarly journals ADAPTASI MODEL DELONE DAN MCLEAN YANG DIMODIFIKASI GUNA MENGUJI KEBERHASILAN IMPLEMENTASI APLIKASI OPERASIONAL BAITUL MAAL WAT TAMWIL (BMT) BAGI INDIVIDU PENGGUNA (Studi Empiris Pada BMT di Kota Semarang)

2016 ◽  
Vol 4 (2) ◽  
pp. 123
Author(s):  
Novita Anugrah Listiyana ◽  
Dedi Rusdi
Keyword(s):  
Path Analysis ◽  
User Satisfaction ◽  
Sampling Technique ◽  
Individual Performance ◽  
Quality System ◽  
Quality Of Information ◽  
Positive Direction ◽  
The Individual ◽  
The Impact

This study analyzed the relationship between humans as users of the system and application software as object an inseparable relationship. The purpose of this study was to analyze the effect of variable quality system to the perception of the quality system, the effect of perceived quality system and quality of information on the intensity of use and user satisfaction, and the influence of the intensity of use and user satisfaction of the impact of individual performance. This research is an empirical study using purposive sampling technique in data collection. Data were collected through  questionnaires to 39 BMT’s operational employees. Then, performed an analysis of the data obtained used path analysis. This included: testing hypotheses through path analysis. The results of tests performed using path analysis to get the results that each variable in the model of equation 4 had a coefficient with a positive direction. This means that the improvement of the quality of the system will be able to improve the quality of information for the individual impact of the use and satisfaction of employees through the use of the system.

The Impact of Information Technology (IT) on Assessing the Quality of Notifications Based on Standard No. 2420 in the Public Sector in Kuwait

2021 ◽  
Vol 13 (8) ◽  
pp. 88
Author(s):  
Bader H. O. Alshammari ◽  
Sulieman Hussien Albeshtawi
Keyword(s):  
Information Technology ◽  
Statistical Analysis ◽  
Public Sector ◽  
Communication Systems ◽  
Internal Audit ◽  
The Public ◽  
Several Variables ◽  
The Impact ◽  
Public Bodies

The researcher aimed to explore impact of information technology (IT) on assessing the quality of notifications based on standard No. 2420 in the public sector in Kuwait. He aimed to explore the impact of several variables - like: computers & software, communication systems, and IT users’ skills – on the quality of notifications based on standard No. 2420 in the public sector in Kuwait. The population consists from all the internal audit departments in ministries and public bodies in Kuwait. The researcher has chosen a conveyance sample consisting from 200 individuals. He distributed questionnaire forms to them. 167 questionnaire forms were retrieved. They are valid for statistical analysis. The researcher found that information technology (IT) has a significant impact on assessing the quality of notifications based on standard No. 2420 in the public sector in Kuwait.

The Impact of Agile Methodologies on the Quality of Information Systems

2010 ◽  
Vol 1 (1) ◽  
pp. 41-56 ◽  
Author(s):  
Kenneth E. Kendall ◽  
Sue Kong ◽  
Julie E. Kendall
Keyword(s):  
Information Systems ◽  
Project Managers ◽  
Quality Of Information ◽  
Software Developers ◽  
Agile Methodologies ◽  
Development Methodology ◽  
Strategic Process ◽  
The Impact ◽  
Selection Of

Systems developers and IT project managers who apply agile methods for developing information systems (IS) subscribe to a set of values and principles. This adherence to a set of values and principles, along with a passion or fervor surrounding the agile philosophy, made us question whether the adoption of agile methodologies has an effect on information systems built, and in particular, the quality of the IS developed. In this paper we construct a conceptual model, conduct a survey of software developers, and analyze our results, which support our hypotheses about the importance of the strategic selection of a development methodology. We conclude that practicing project managers should consider the decision to use certain methodologies as part of the strategic process.

Free Space Optical Communication System under Different Weather Conditions

2019 ◽  
Vol 0 (0) ◽  
Author(s):  
Mohammad Yawar Wani ◽  
Hitesh Pathak ◽  
Karamjit Kaur ◽  
Anil Kumar
Keyword(s):  
Attenuation Coefficient ◽  
Optical Communication ◽  
Free Space ◽  
Communication Systems ◽  
High Speed ◽  
Free Space Optical Communication ◽  
Free Space Optical ◽  
Wide Range ◽  
Space Optical Communication ◽  
The Impact

AbstractFree space optical communication systems (FSO’s) have surfaced as admired means of communication in the past few years. High speed of operation, low bandwidth requirements and system reliability are the major factors responsible for their wide range of applications. These communication systems use air as a medium of transmission. Since there is no component like fiber or cable, but air is only medium, the variations in atmospheric conditions play a vital role in performance of these networks. The reason behind is that the conditions like presence of humidity, haze, snowfall, rain, dust or smoke changes the attenuation coefficient of medium. The raised attenuation levels results in increased losses and need to be carefully monitored. The present work analyzes the influence of rain on the performance of FSO network in terms of quality of transmission. The paper discusses the impact of rainfall on attenuation coefficient of air. Then impact of this attenuation on network transmission is presented in terms of BER and Q-factor. In order to demonstrate the impact, BER and Q-value is calculated for 10 Gbps FSO link for clear weather and rainfall conditions.

Reduced Complexity Optimum Detector for Block Data Transmission System Using An Lattice Sphere Detection Technique

2015 ◽  
Vol 793 ◽  
pp. 523-529
Author(s):  
Mahmoud A.M. Albreem ◽  
Azuwa binti Ali
Keyword(s):  
Data Transmission ◽  
Communication Systems ◽  
High Speed ◽  
Lattice Structure ◽  
The Other ◽  
Gram Matrix ◽  
Generator Matrix ◽  
Transmission Systems ◽  
Sphere Detection ◽  
Block Data

Block Data Transmission Systems (BDTS) are used in high speed wireless communication systems with time dispersive channel characteristics. Since Maximum Likelihood Block Detection (MLBD) requires huge amount of computation, Sphere Detection (SD) technique has been introduced as an alternative. This paper proposes an An Lattice Sphere Detection (AnLSD) technique for detection in block data transmission systems (BDTS). The An lattice structure offers more dense constellation points than the customary Zn lattice in SD technique. Thus, the proposed AnLSD uses An lattice generator matrix as the channel matrix, and uses the Gram matrix which is obtained from the generator matrix as part of the detection process. Simulation results show that the proposed AnLSD performs very close to the Exhaustive search (ES) using block size of 20 bits. It is also performing better than the other renowned methods tested under a channel with spectral nulls. The proposed AnLSD technique offers significant reduction in term of objective functions evaluation as compared to the other renowned methods.

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