Software Engineering

ISSN Online: 2376-8037 ISSN Print: 2376-8029

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Volume 9, Issue 3, September 2021

  • Authors: Dulo Husen, Zelalem Shalemew, Ayub Jelde, Anbase Ambomsa, Tesfaye Gemechu

    Abstract: The activity was conducted during 2019 cropping season in Dugda District of Tepho Choroke Peasant Association. The objective was to scale up the selected in-situ moisture conservation structures (Tied ridge and furrow closed at both ends) with maize crop, improved farmers' knowledge and skills on application of improved technology through training and analyzed cost benefit of the structures. Five FREG groups were established in Tepho Choro Peasant Association of Dugda district. The total number FREG members were hold 30 male and 10 female farmers. A total of 130 farmers and 22 experts were participated on the training respectively. The mean yield obtained from tied ridge and furrow closed at both ends were 99.41 and 86.74 kg ha-1, respectively and sold 850 Birr Qt-1 at the current price. The net benefit obtained from tied ridge and furrow closed at both ends were 56,230 and 45,194-Birr ha-1 respectively. This implied that, the profit obtained from tied ridge was much better than furrow closed at both ends. This structure is much better in increasing yield and crop residue of maize. In addition, the total estimated profit obtained from furrow closed at both end are much better than the usual farmers practice. This also implied that in-situ moisture conservation structure (tied ridge and furrow closed at both ends) are more economical and better if it is more scale up in the study area and similar agro ecologies. Extension worker and district Agricultural Bureau should have given a great attention to scaling up these technologies to overcome problem of moisture deficit and food insecurity and improve agricultural production in the study area and similar agr-ecologies.

    Received: Dec. 11, 2020 Accepted: Aug. 24, 2021 Published: Sep. 3, 2021

    DOI: 10.11648/ View: Downloads:

  • Authors: Jozef Bohdan Lewoc, Eduard Babulak, Erich Leitgeb, Nicolae Bulz, Mieczysław Rozent

    Abstract: This article is a herald of our Book 3 devoted to good ICT (Information and Communication Technology) design implementation practices gained during design and development of the Polish pioneering Computer Control Systems destined for the Steel-Bar Mill of a Warsaw Metallurgical Plant in Warsaw and for the Michelson Interferometer of the Nicolas Copernicus University in Torun. This article describes the basic premises valid for the Steel-Bar Mill system and the position assumed by the small 2-person design team to prove that such complex Computer Control Systems may be designed by local teams using home computer hardware and software systems. The description of Odra 1204 hardware and software available for the project is roughly mentioned together with the presentation of the performance evaluation system developed and run for the Steel-Bar Mill commissioning case and general as well as detailed conclusions. The final phase was mentioned and general conclusions were drawn. The ethical and HB assessment were developed and validated. Similar steps were mentioned and/or described for the Michelson Interferometer (Radio-Astronomic Dish Set planned for the Nicolas Copernicus University in Torun).

    Received: Jul. 21, 2021 Accepted: Aug. 30, 2021 Published: Sep. 6, 2021

    DOI: 10.11648/ View: Downloads:

  • Authors: Li Hui, Li Jing, Li Ruofan, Wang Dongkun

    Abstract: Traditional Direct Digital Synthesis (DDS) waveform generators were usually completed by DDS chips, which were expensive and poorly customizable. This paper proposed a CPLD-based DDS multi-waveform generator design. DDS was independently developed and programmed by VHDL language. The system could be interfaced with PC. The system was mainly divided into two parts: upper computer and lower computer. The upper computer part mainly included the main interface design of the system, the sending of control commands and the receiving part of data. The sending and receiving of commands and data was realized by serial communication. The upper computer part was programmed by High-level programming language named DELPHI. The lower computer part mainly included DDS design part, the reception of control commands and the transmission of data, etc., the lower computer part mainly adopt VHDL language to be programmed in CPLD. The DDS design part mainly included the design of the phase accumulator, the design of the ROM, the design of the D/A part, and the design of the low-pass filter. The system could adjust the frequency of the output waveform by adjusting the size of the frequency word, and adjust the waveform shape of the system output by adjusting the internal data of the ROM. Simulation and experimental results showed that: the DDS multi-waveform generator designed by CPLD could achieve the expected goal, and the work effect was good.

    Received: Aug. 16, 2021 Accepted: Aug. 30, 2021 Published: Sep. 7, 2021

    DOI: 10.11648/ View: Downloads:

  • Authors: Li Hui, Li Jing, Li Ruofan, Wang Dongkun

    Abstract: In order to further improve the accuracy of the distance measurement of agricultural robots and realize the precise delivery of crop feeds, thereby increasing the yield of crops, this paper proposed a ultrasonic distance measurement system for agricultural robots based on Complex Programmable Logic Device (CPLD). The system mainly included two parts: hardware and software. The hardware part mainly included CPLD control part, ultrasonic sensor and temperature sensor. The software part mainly included the identification and counting of ultrasonic signals, data processing and temperature compensation. The system performed accurate ultrasonic ranging based on the current temperature and ultrasonic echo measurement. In order to improve the degree of humanization of the system, the system used a high-brightness digital tube to display the measured data in real time. The part of hardware had been analyzed and designed, and the same time the part of software had been designed by the language of VHDL and simulated by wave in QUARTUSII platform. Finally the design was downloaded to a CPLD chip named EPM1270T144C5. The system was tested by measuring the distance of block range from 50mm to 5500mm in the temperature of 28°C. After actual system testing, we found that the precision of test could be controlled less than 0.1 mm as a result of temperature compensating and high-speed characteristic of CPLD.

    Received: Aug. 16, 2021 Accepted: Sep. 4, 2021 Published: Sep. 10, 2021

    DOI: 10.11648/ View: Downloads: