The stabilization of soil through the addition of fly ash has been shown to be an effective alternative for improving the strength and stiffness of soil through the resulting chemical reactions. The chemical reaction that occurs dissociates the lime (CaO) in the fly ash, and the establishment of cementitious and pozzolanic gels (consisting of calcium silicate hydrate (CSH) gel and calcium aluminate hydrate (CAH) gel) binds the soil particles and increases the strength and stiffness of the soil. Investigations into the mechanical properties of sands stabilized with fly ash (fly-ash-stabilized sands) were conducted through a series of unconfined compressive strength (UCS) and direct shear strength tests for various fly ash percentages, curing times, grain sizes, degrees of saturation during sample preparation, and content of fines. It was found that the mechanical properties—UCS and direct shear strength (DSS)—of fly-ash-stabilized sands increased with both increasing fly ash content in the specimen and curing time, but decreased with increasing grain size, degree of saturation during sample preparation, and content of fines. The results indicated that fly-ash-stabilized sands required more than a month to attain their optimum performance with regard to binding sand particles.

Indonesia, which is an archipelagic country consisting of islands, sea transportation is an absolute necessity for those living in the archipelago. The port terminal is a tool for the process of moving goods and passengers to transfer modes of movement either through sea transportation or land transportation. The purpose of this study was to determine the characteristics of sea transportation users at the Kendari Nusantara port terminal. The method in this study uses a qualitative descriptive by distributing questionnaires to users of the Nusantara Kendari port terminal who want to travel between islands. The results of the study based on the characteristics of sea transportation users through the Kendari Archipelago port were obtained based on the characteristics of sea transportation users (passengers) at the port terminal.the male gender is 57.33%, the most dominant travel destination is Muna Regency at 38.67%, the reason for using fast express boats is the consideration of travel time by 52%, the purpose of the trip is dominated by educational interests by 32.67%, The frequency of using fast boats is very frequent, which is more than 4 times by 33.33%.

The Lupia Village irrigation network was formed in 1981 through farmer groups from the results of non-governmental organizations. Currently the government has given attention and assistance both through the village fund budget and central government funding assistance, however, there is still a need for program sustainability from related parties. The results of the identification were carried out, namely that there were still few people who did not understand about the more effective use of irrigation water, so that there was always a crop failure where other plots of rice fields had excess water while the farthest plots did not get water. The area of land used by the community is currently around + 35 hectares, but the available land and the potential to be used as rice fields are around + 90 hectares, so that what has not been functioned as rice fields is about + 55 hectares. Seeing this condition, it is very potential to be developed to be able to increase the production of rice fields in Lupia Village, from this potential, the Lecturer of the Faculty of Engineering, Halu Oleo University as part of the Tridarma of Higher Education, carries out community service activities through the transfer of knowledge so that the community can develop, increase production, and improve community welfare, especially the residents of Lupia Village, Kabangka District, Muna Regency. The methods used are socialization, technical guidance, training on procedures for implementing technical irrigation canal development so that water is not wasted and can be fully utilized by farming communities. The expected result is that the community can increase the yield of lowland rice production. Seeing the potential of Lupia Village in Kabangka District, it is hoped that the program can be carried out continuously so that it can increase income and a better standard of living for its people.

South Konawe and Muna Island are strategic locations to make the ASDP Port one of the sea centers in Southeast Sulawesi, but the current performance of the Torobulu port is not maximized in providing services to users. The purpose of this study is to study the performance of the Torobulo Konawe Selatan Port for now. and Provide solutions to the problems of the Torobulu-Tampo port in terms of service to the government. Performance analysis using the Importance Performance Analysis (IPA) method of the analysis method is done by considering the factors of interest and level of satisfaction. The results showed that of the 15 indicators that can be used in quadrant 1 (low priority) is the attitude of officers in serving jobs 3.52 and a value of 4.35, the area of scope with performance of 3.50 and the value of 4.26, supporting facilities in the room wait with a performance value of 3.70 and a value of 4.24, cleanliness of the port area with a performance value of 3.71 and a value of 4.35. Support facilities in the waiting room with a performance value of 3.66 and a value of 4.07.

Urban transport systems in Indonesia have been influenced by kinds of traffic problems such as congestion, high accident rates and traffic violations and uncomfortable, safe, and orderly levels of public transport services. To develop urban transportation systems, a policy implementation is needed in public transportation such as special lanes for Bus Rapid Transit (BRT) as one of the alternative solutions to give better services for the public transport user. The purpose of this study is to count the demand of bus rapid transit, determine number of corriors and halte for the BRT as well as know the types of BRT which should be operated in Kendari City in accordance with the needs of public transport users. The method used in this study is the quantitative method by collecting primary and secondary data which includes OD Matrix of destination of the population travel, Number of Passengers up and down on each route, Load factor in each route, Travel time and Road Inventory Data. Other data include Road length, Road width, Road type, width of trotoar, width of median, and Road Pavement type. The results of this research is that the number of demand for public transportation in Kendari City are 28 buses with 8 units in the first corridor, 6 units in the second corridor, 8 units in the third corridor, and 6 units in the fourth corridor. Indeed, the total number of corridors needed to operated of BRT in Kendari requires 174 shelters. The potential population in Kendari City is categorized on the modest development and the existing conditions of the road, which is not too large for the BRT line planned. Therefore, the possibility of increasing the number of passengers then the type of bus which may be used as a fleet of BRT at the beginning of the operation is large floor buses total capacity of 79 people consisting of 49 seated passengers and 30 passengers standing