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This article explores and optimizes network technologies for wind energy systems, focusing on the RS-485 interface to ensure reliable data transmission in extreme conditions. The study aims to address the impact of various distortions on data quality and wind turbine management. A system was proposed with two wind turbines, each equipped with a Raspberry Pi 4, connected to sensors measuring temperature, vibration, and wind speed. The research examined how data transmission rates affect signal shape, calculating the distortion coefficient. At 460,800 baud, the signal was almost completely distorted, with significant amplitude loss. The distortion coefficients were 1.84 for logic '1' and 1.92 for logic '0'. The optimal speed to minimize distortions was found to be 19,200 baud, providing the most stable signal. Additionally, temperature significantly impacted transmission quality, highlighting the need to consider climatic conditions in system design. The findings and methods can help improve existing data transmission systems and enhance wind turbine performance. [ABSTRACT FROM AUTHOR]

The network computing-based teaching project information sharing platform is an educational platform that uses the modern network technology and computing resources to realize the information sharing and cooperation between teachers and students. However, the traditional method of the generating the teaching project information sharing platform has some problems such as slow transmission speed and limited storage space. Therefore, this paper studies the information sharing platform of teaching project based on network computing, and studies the method of the information sharing platform of teaching project based on network computing by literature research, empirical analysis and other methods. Through the comprehensive analysis of the relevant research and practical cases in this field, the basic principles, technical architecture and functional characteristics of the platform are more clearly understood. The information sharing platform of teaching project based on network computing can realize the information transmission and storage of teaching project within its own platform so as to avoid the shortcomings of the traditional method due to the difference of storage space, speed and operation mode. Compared with the traditional method, the information sharing platform of teaching project based on network computing can achieve higher transmission speed, larger storage space, better security and better user experience. The platform adopts modern network infrastructure and distributed storage computing technology to realize the faster and more efficient transmission and processing of data. [ABSTRACT FROM AUTHOR]

Copyright of Carsologica Sinica is the property of Institute of Karst Geology, CAGS and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

This article explores and optimizes network technologies for wind energy systems, focusing on the RS-485 interface to ensure reliable data transmission in extreme conditions. The study aims to address the impact of various distortions on data quality and wind turbine management. A system was proposed with two wind turbines, each equipped with a Raspberry Pi 4, connected to sensors measuring temperature, vibration, and wind speed. The research examined how data transmission rates affect signal shape, calculating the distortion coefficient. At 460,800 baud, the signal was almost completely distorted, with significant amplitude loss. The distortion coefficients were 1.84 for logic ‘1’ and 1.92 for logic ‘0’. The optimal speed to minimize distortions was found to be 19,200 baud, providing the most stable signal. Additionally, temperature significantly impacted transmission quality, highlighting the need to consider climatic conditions in system design. The findings and methods can help improve existing data transmission systems and enhance wind turbine performance.

The article provides an assessment of the efficiency of transmission data systems by digital subscriber lines of fixed broadband access over multi-pair telephone cables using the transient interference compensation system “vectoring” between transmission systems. A technique for calculating the signal-to-noise ratio at the receiver input is proposed, which takes into account frequency characteristics and additive interference of lines, uncompensated transient interference between mutually influencing transmission systems, and the limitation of the power of transmitted signals associated with the normalization of the transmitter power, caused by the use of the “vectoring” system. The effectiveness of transmission systems with the help of the transient interference compensation system “vectoring” is evaluated by broadband access network models using G.fast technology when using a multi-pair telephone cable of the TPP type with the number of pairs up to 100 in the frequency range up to 106 MHz and line lengths up to 250 meters. The achievable transmission speed is estimated depending on the characteristics of subscriber lines, the number of parallel operating transmission systems and the limitation of the transmitted signal power. It was determined that the main reason for limiting the achievable speed of information transmission when using the “vectoring” system is the frequency characteristics and additive interference of subscriber lines, uncompensated transient interference and limitation of the power of the transmitted signal. The proposed method of evaluating the signal/noise ratio and the achievable speed of data transmission with vectoring transient interference compensation systems can be applied in the tasks of designing and building fixed broadband access networks that use multi-pair telephone cables and twisted pair cables as a transmission medium. [ABSTRACT FROM AUTHOR]

Compared with traditional radio frequency communication, visible light has rich spectrum resources and high security. The multi-channel visible light communication system designed in this paper is divided into transmitter and receiver. Based on Verilog HDL language, the channel distribution module, transparent framing module, channel code block segmentation module at the transmitter, transparent framing module and channel merging module at the receiver are designed in detail, and a multi-channel visible light communication system that supports 16 channels of data at the same time is realized. In order to meet the demand of the high-speed communication of the system, the transmitter / receiver circuit of visible light communication is designed and optimized, and the pre emphasis circuit is used at the transmitter to effectively compensate the channel loss. In the receiver, a T-shaped amplification circuit composed of resistance and capacitance is used to compensate the attenuated signal. Finally, the test is carried out on the experimental platform. The results show that the transmission error rate of the multi-channel visible light communication system designed in this paper is not greater than 10-9, and the single channel transmission rate is not less than 30 Mb/s. This research is conducive to improving the reliability and high speed of the visible light communication system.

Copyright of Journal of Data Acquisition & Processing / Shu Ju Cai Ji Yu Chu Li is the property of Editorial Department of Journal of Nanjing University of Aeronautics & Astronautics and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Management practitioners often assume that raises in the contractual absolute maximum bandwidth of Internet connections increase the attitudinal bonds of customers with their access provider. The present study challenges this perspective: In a sample of up to 752 German-speaking Internet users with a wireline Internet access at home, it explores two relative speed characteristics of broadband connections (customer quality experiences in terms of delivered transmission speeds (1) relative to the maximum down- and upload bandwidths as per customer contract, and (2) relative to speeds emphasized in advertisements of a consumer’s access provider) as potential determinants of customer affinity with an access provider. Furthermore, correlations are analyzed between the frequency with which customers use speed tests to check the quality of their wireline Internet connection and their attitudinal bonds with their access provider. Multivariate regression analysis reveals that the impression that advertised wireline access bandwidths are exaggerated compared to the speeds actually delivered and – to a lesser extent – the perception that the contractual maximum speed is reached only in a low share of a customer’s Internet sessions significantly decrease customer satis-faction and significantly increase customer inclination to churn. The effects of the two speed assessments are not independent of one another: Perceived speed exaggerations in a provider’s ads impair customer bonds less (more) strongly if the experienced share of Internet sessions with speeds below the contractual maximum bandwidth is high (low). More frequent speed testing reduces customer bonding, especially in case that advertised speeds of a customer’s provider are experienced as overblown.

So far, management practitioners and scholars alike assume that raises in the contractual absolute maximum bandwidth of Internet connections increase the attitudinal bonds of customers with their access provider. The present study broadens this perspective: In a sample of up to 752 German-speaking Internet users with a wireline Internet access at home, it explores two relative speed characteristics of broadband connections as potential determinants of customer affinity with an access provider. The two reference-dependent aspects comprise customer quality experiences in terms of delivered transmission speeds (1) relative to the maximum down- and upload bandwidths as per customer contract, and (2) relative to speeds emphasized in advertisements of a consumer’s access provider. Furthermore, correlations are analyzed between the frequency with which customers use speed tests to check the quality of their wireline Internet connection and their attitudinal bonds with their access provider. Attitudinal bonding is broken down into customer satisfaction with the performance of the current wireline Internet access at home and propensity to churn at the earliest opportunity. Multivariate regression analysis reveals that the impression that advertised wireline access bandwidths are exaggerated compared to the speeds actually delivered and – to a lesser extent – the perception that the contractual maximum speed is reached only in a low share of a customer’s Internet sessions significantly decrease customer satisfaction and significantly increase customer inclination to churn. The effects of the two speed assessments are not independent of one another: Perceived speed exaggerations in a provider’s ads impair customer bonds less (more) strongly if the experienced share of Internet sessions with speeds below the contractual maximum bandwidth is high (low). More frequent speed testing reduces customer bonding, especially in case that advertised speeds of a customer’s provider are experienced as overblown. The results suggest that wireline Internet access providers can increase the attitudinal bonds with their customers by abstaining from emphasizing maximum speeds in their advertising, which customers rarely reach under standard everyday conditions.

Web anonymization tools have been used for a long time, primarily by the users afraid of possible undesirable consequences of their on-line activity on the web. The paper analyzes both historically proven anonymization tools like TOR and newer tools, namely JAP/JonDo and CyberGhost VPN that are based on slightly modified technological principles. The primary focus is given to the measurement and evaluation of the latency increase and the transmission speed decrease in comparison to normal (non-anonymized) web browser operation. Results show that all anonymization tools being subject of the analysis provide relatively moderate latency increase. On the opposite, the transmission speed decrease was more significant, especially for JonDo. This confirms the conclusions of previous studies resulting that no anonymization tool is suitable for daily web browsing. On the other hand, in the case when higher anonymity is required, their use can be reasonably comfortable from the point of view of latency increase. However, their usefulness for downloading larger files is always disputable.

Copyright of Computer Measurement & Control is the property of Magazine Agency of Computer Measurement & Control and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

So far, management practitioners and scholars alike assume that raises in the contractual absolute maximum bandwidth of Internet connections increase the attitudinal bonds of customers with their access provider. The present study broadens this perspective: In a sample of up to 752 German-speaking Internet users with a wireline Internet access at home, it explores two relative speed characteristics of broadband connections as potential determinants of customer affinity with an access provider. The two reference-dependent aspects comprise customer quality experiences in terms of delivered transmission speeds (1) relative to the maximum down- and upload bandwidths as per customer contract, and (2) relative to speeds emphasized in advertisements of a consumer's access provider. Furthermore, correlations are analyzed between the frequency with which customers use speed tests to check the quality of their wireline Internet connection and their attitudinal bonds with their access provider. Attitudinal bonding is broken down into customer satisfaction with the performance of the current wireline Internet access at home and propensity to churn at the earliest opportunity. Multivariate regression analysis reveals that the impression that advertised wireline access bandwidths are exaggerated compared to the speeds actually delivered and – to a lesser extent – the perception that the contractual maximum speed is reached only in a low share of a customer's Internet sessions significantly decrease customer satisfaction and significantly increase customer inclination to churn. The effects of the two speed assessments are not independent of one another: Perceived speed exaggerations in a provider's ads impair customer bonds less (more) strongly if the experienced share of Internet sessions with speeds below the contractual maximum bandwidth is high (low). More frequent speed testing reduces customer bonding, especially in case that advertised speeds of a customer's provider are experienced as overblown. The results suggest that wireline Internet access providers can increase the attitudinal bonds with their customers by abstaining from emphasizing maximum speeds in their advertising, which customers rarely reach under standard everyday conditions. [ABSTRACT FROM AUTHOR]

Copyright of Przegląd Elektrotechniczny is the property of Przeglad Elektrotechniczny and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The primary purpose of this study is to present the fact that high-speed internet service should be designated as universal service because it becomes an indispensible and crucial service in the modern information society but free market system fails to implement universal service of high-speed internet service. To do so, it theoretically analyses previous works related to the issue of high-speed internet service and universal service in a critical point of view and investigates the current situation that high-speed internet service is not designated as universal service. In conclusion, this paper suggests that high-speed internet service should be included in the scope of universal service, in terms of infrastructure and minimum transmission speed, for the development of democracy and the information society. [ABSTRACT FROM AUTHOR]

Greenhouse is a very effective method of matching and has been able to contribute to food independence in various countries. Plants that are in the greenhouse must be maintained with chemical-physical parameters in order to grow optimally. Monitoring of plants in greenhouses must always be done. Some monitoring reports have been made online so that they can provide solutions as quickly as possible if there is a disturbance on the plants. Unfortunately, online monitoring is still dependent on internet networks that require network infrastructure needs that have many limitations. As a result, many agricultural lands are not covered by the internet network to monitor the greenhouse. The use of a large number of sensor nodes also affects the decline in available broadband internet performance so as to reduce monitoring performance. In this research proposed a fog network that connects the sensor node with the local fog server via a WIFI network. Sensor node has been built with a system on chips WIFI-Microcontroller ESP8266 to perform data acquisition and temperature sensor data transmission, relative humidity and light intensity using the WIFI network to the fog server. In this study testing the accuracy of sensor parameters used and network performance by comparing with the use of cloud networks. From the tests performed, the results of Mean Absolute Percent Error (MAPE) were obtained for each parameter, temperature = 1.3%, humidity: 1.9% and light intensity: 0.6%. The use of the fog network has proven to not contribute significantly to the error value of measurement data sent to the server. The use of WIFI on the fog network requires less network broadband needs when compared to cloud networks. This difference is very significant, which is an average of 253 BPS if using a fog network and 1276 BPS if using a cloud network. From the experiments conducted, the use of networks for proven to have a high data transmission speed with value 471 ms when compared to the internet network with value 1349 ms. Variations in the number of sensor nodes up to 5 nodes do not significantly affect that speed.

The universal serial bus (USB) has some advantages like high transmission speed, plug‐and‐play and hot swapping, and has become the most popular interface standard for peripheral connections. However, such features also make it easier for a malicious user to extract confidential files from computer systems via USB ports. Consequently, to control the potential security risks of USB interface, many workplace and commercial corporations have directly forbidden their employees from using USB devices. To provide a flexible way of using USB without compromising security, this study proposes a novel secure control protocol for USB storage devices. The device and the server are required to complete mutual authentication and establish a session key used to encrypt the transferred files. The details of each phase of the new protocol are given. Security analysis demonstrates that the proposed protocol conquers those security pitfalls existing in the available protocols and can resist various attacks. Performance discussion indicates that the new protocol is also efficient enough for practical applications. [ABSTRACT FROM AUTHOR]

Copyright of Tecnura is the property of Tecnura and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Existing wireless communication devices today may generate loss of conveyed information, inherent to the data processing to be transmitted. WLAN technology (Wireless Local Area Network) is linked to devices' specific restrictions and takes into account other parameters such as: bandwidth, radiation power, and range. For this reason, a great progress in developing systems to work faster and process information efficiently has been made, thus, becoming more user-friendly. The results shown in this article demonstrate that it is possible to transmit biomedical signals such as electrocardiograph (ECG), respiration, and blood pressure (BP) activities, among others, through a 2,4GHz-frequency wireless network. Nevertheless, the abovementioned situation is subject to existing regulations in Colombia regarding industrial, scientific, and medical activities (ISM), which will also be expounded. [ABSTRACT FROM AUTHOR]

This letter presents new experimental results on a 1-Mb/s organic visible light communications system. These results are the first demonstration of a fully organic free space optical communications system. Due to low charge transport characteristics, organic devices are typically highly band limited in the hundreds of kilohertz region (up to 135 kHz in this letter). Therefore, an artificial neural network (ANN) equalizer is required to undo the effects of intersymbol interference. Without the ANN, the maximum link performance corresponds to a data rate of 350 kb/s; however, with the ANN, a transmission speed of 1.15 Mb/s could be supported. [ABSTRACT FROM PUBLISHER]

In this paper the method of risk assessment for the effects of protection mechanisms in the wireless information & telecommunication systems, which operate in the implementation of information operations attacks. The method takes into account the additional risk that arises in the application of mechanisms to protect information when information conflicts, which reduces the specific parameters of wireless information & telecommunication systems: its handling capacity, transmission speed, communication range, time of communication, which is an additional risk under the fighting. In applying the method reduced the article presents the results of modeling of reducing the data rate UV station in the application of noise -interference regime in different states to change the overall risk and relation with the results of previous studies. [ABSTRACT FROM AUTHOR]