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2021 ◽  
Vol 16 (6) ◽  
pp. 691-699
Author(s):  
Purnama Ningsih ◽  
Sitti Rahmawati ◽  
Ni Made Nila Santi ◽  
Suherman ◽  
Anang Wahid M. Diah

This study aims to determine the physical and chemical characteristics of the edible film of jackfruit seed starch (Artocarpus heterophyllus) added with antioxidant rosella flower extract (Hibiscus sabdariffa). The type of plasticizer used is glycerol. The best treatment in this study was the jackfruit seed edible film with the addition of rosella flower extract 3% (v/v) with the results obtained respectively for a thickness of 0.09 mm, tensile strength 0.003332 N/mm2, elongation percentage 126.36%, elasticity 0.002637 Kgf/mm2, pH 6.122, water absorption 61.67%, solubility 40%, water vapor transmission speed 0.6714 gram/hour m2, FTIR test results show that the process of making edible film in this research is the mixing process Physics, the shelf life of edible film at room temperature is 6 days and at cold temperatures is 8 days, and has antioxidant activity with an IC50 value 219.948 ppm. The addition of rosella flower extract enhances another benefit of edible film which functions as a food protector from the oxidation process (antioxidant).


2021 ◽  
Vol 2052 (1) ◽  
pp. 012056
Author(s):  
V I Zharkov ◽  
M N Petrov ◽  
I Y Griskevich

Abstract The article presents a technology for developing a terminal device for a multiplexed serial interface for data exchange to FPGA. The development was carried out using the System Verilog hardware description language. To meet demanding requirements. presented to this interface in terms of transmission speed, as well as the duration of transmitted and received bits of information, the device includes a built-in signal duration analyzer, which can also be used to exclude the influence of a part of the impulse noise that “leaked” through the input high-pass filter. The presented device has passed the verification of the main operating modes in the ModelSim-Altera software environment.


2021 ◽  
Vol 2079 (1) ◽  
pp. 012032
Author(s):  
Rui Su ◽  
Yawen Dai

Abstract In the era of the Internet of Everything, applications based on real-time location continue to appear in various industries. The indoor and outdoor positioning, analysis and management of personnel and objects can effectively improve the efficiency of production and management, which is of great significance to many industries. The use of Bluetooth beacon positioning has the advantages of low energy consumption, low cost, and fast data transmission speed. However, in real life, there are two obstacles to receiving signals, which are easily affected by the environment and the need for frequent on-site maintenance. This paper designs and implements a new type of LoRa-based smart Bluetooth beacon, which can be quickly connected to LoRa. Online monitoring and remote control can achieve better adaptation to the environment, and can fit a better signal attenuation model in the deployment environment in real time. Traditional signal strength positioning solutions have their own limitations. In order to improve the positioning accuracy of the Bluetooth beacon and the universality of the algorithm, in view of the low deployment density of beacons, the positioning accuracy is not good and the anchor circle has various situations, an optimized weighted centroid positioning scheme integrating greedy strategy is proposed.


2021 ◽  
Vol 2078 (1) ◽  
pp. 012069
Author(s):  
Jie Xu ◽  
Hui Li ◽  
You-Ling zhou ◽  
Qian Li ◽  
Liu-Xun Xue ◽  
...  

Abstract As a carrier for information and energy, acoustic waves have been applied in underwater communication widely, however, the narrow band and low transmission speed are the main problems. Whether in the field of optics or electromagnetic waves, the orbital angular momentum (OAM) represents the natural properties of the spiral phase structure. By introducing the OAM into the acoustics field, the transmission capacity and spectrum efficiency of the underwater acoustic communication system can be expanded. Based on the analysis and detection of the vortex acoustic wave generated by the circular array of transducers, we studied the array generation method of the spiral acoustic beam, and gave the characteristics of the vortex acoustic beam when propagating under the water. In the direction of the main axis, the uniform circular array was used to generate different topological acoustic vortex. To determine the relationship between the OAM topology mode and the transducer array, the spiral acoustic waves in different topology modes were generated, and the number of array elements, array radius, transmission frequency, etc. were investigated to give the effects on OAM acoustic vortex.


2021 ◽  
Vol 2111 (1) ◽  
pp. 012049
Author(s):  
Deny Budi hertanto ◽  
Rustam Asnawi ◽  
Faranita Surwi ◽  
Nurman Setiawan

Abstract In the previous article about detecting train arrivals [4], we discussed the data transmission process which is the weakness of the system. This article discusses how to overcome these shortcomings. Distance detection systems need to be added to devices that are more powerful and faster in transmitting data. The prototype is built based on the development of the previous prototype. The initial product is a distance detector that has a motion sensor and a data transmission module in the form of Lora 400 MHz and a GSM module. Product development includes the addition of the NodeMCU WIFI module to existing devices. System development aims to: (1) Develop a distance detection system equipped with a WIFI module; and (2) Increase the data transmission speed of the distance detection system equipped with the WIFI NodeMCU module. The implementation method uses research and development techniques [3]. System development takes 6 months, with the stages of completion being system requirements analysis, hardware, and software design, system prototyping, and tool testing. Checklist data and delivery time are used as test data. Furthermore, the data is analyzed quantitatively to determine the achievement of results according to predetermined indicators. The device is equipped with a GPS module, a Lora-R02 receiver and transmitter module, and a Nodemcu ESP8266 module as a replacement for the 900A SIM module which transmits data faster. When the device is being tested, all the sensors of the tool work well at range of 125 meters (previously less than 100 meters). While the Lora module can react when the object has reached a distance of 300 meters. Data transmission previously using GSM modules took 10-13 seconds. After using the WIFI module, data transmission only takes 1-3 seconds.


2021 ◽  
Vol 2083 (2) ◽  
pp. 022032
Author(s):  
Yongzheng Zhan ◽  
Tuo Li ◽  
Yuqiu Yue ◽  
Tongqiang Liu ◽  
Yulong Zhou ◽  
...  

Abstract A lower power 25Gb/s 16:1 multiplexer using 65nm CMOS technology for 400Gb/s Ethernet (400GbE) physical layer (PHY) interface was presented. CMOS+CML mixed logic is adopted to achieve hierarchical architecture, avoiding the high clock requirement of one-step structure and improving the transmission speed. In order to reduce power while achieving high data rate, multiplexing structure is also optimized by utilizing multi-frequency multi-phase technology which not only ensures the requirement of the phase stabilization, but also leaves out some flip-flops. For CMOS-CML conversion circuit, transmission gate and cross-coupled CMOS inverter are used to match the delay of CMOS inverter, suppressing the effect of common-mode noise. Simulation results show that the multiplexer works correctly and jitter of output signal is less than 0.1UI. When voltage is 1.2V, the total power is 32.7mW at 25Gb/s.


2021 ◽  
Author(s):  
Lilita Ģēģere

In recent years, the information technology sector has developed rapidly and there has been a rapid increase in the amount of information transmitted. The demand for larger telecommunication network capacities is growing, therefore it is necessary to increase the number of channels and transmission speed in wavelength division multiplexed transmission systems. Various optical amplifiers can be used to compensate for the attenuation of the accumulated signal (over a wide wavelength range). The Doctoral Thesis did research on the use of EDFA, Raman, FOPA and combined optical amplifiers in wavelength division multiplexing systems. In the work, special emphasis is placed on erbium and ytterbium alloy fibers with the study of computer modeling of optical amplifiers in cladding pumping technology.


Author(s):  
Zhihao Cui ◽  
Ting Zheng

Human–computer interaction systems have been developed in large numbers and quickly applied to sports. Badminton is the best sport for applying robotics because it requires quick recognition and fast movement. For the development of badminton recognition and tracking systems, it is important to accurately identify badminton, venues, and opponents. In this paper, we designed and developed a badminton recognition and tracking system using two 2 000 000-pixel high-speed cameras. The badminton tracking system has a transmission speed of 250[Formula: see text]fps and the maximum speed of the badminton resonator is 300[Formula: see text]km/h. The system uses the camera link interface Camera Link to capture images of high-speed cameras and process all captured images in real time using different regions of interest settings. In order to improve accuracy, we propose a new method for judging the center point of badminton. We have proposed a detector that detects the four corner points of the field by using the contour information of the badminton court when the approximate position of the badminton court is known. We set the sensing area according to the approximate position of the badminton court and use the histogram in the sensing area to select the point closest to the contour. Specify the intersection of the line as the corner point of the badminton court. The proposed angle detector has a high detection rate. It is more than 10 times more accurate than traditional detectors. The moving badminton is detected by an elliptical detector. We propose a method to find the center of the correct ellipse from the four candidates by selecting the four candidate contours of the ellipse. Compared to conventional circular detectors and points on three-dimensional coordinates, the proposed elliptical detector reduces the error by about 3[Formula: see text]mm.


2021 ◽  
pp. 1-13
Author(s):  
Dayong Guo ◽  
Qing Hu

Aiming at the problems of low precision, slow data transmission speed and long response time of silk quality and temperature control in tobacco intelligent production line, a multi-index testing system is designed. According to the characteristics of PROFIBUS fieldbus technology, combined with PROFIBUS transmission technology, a factory level information network is formed with PROFIBUS-DP as the exchange mode. Based on the PROFIBUS technology, the dual redundancy structure of control ring network and management information ring network is adopted, and the whole network architecture is constructed by logic layering. From the point of view of building enterprise MES system, it locates real-time production monitoring, production task receiving and production line related data collection, integrates equipment control layer, centralized monitoring layer and production management layer, and designs system function structure. The functional structure of the system, and the establishment of a number of data tables, to achieve a tobacco intelligent production line silk quality detection system design. Experimental results show that this method can effectively speed up the data transmission speed and shorten the system response time.


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