Hasanuddin University Graduate School: Open Journal Systems
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Analysis of CO2 Emission from Motorized Vehicle based on Segmentation of Urip Sumoharjo Road at Makassar City
Full text linkThis study aims to analyze the amount of CO2 emissions from motorized vehicles through six segments at St. Urip Sumoharjo, and identify relationship between those variables. Segmentation conducted to understand the vehicle volume with the different geometric of road. The method used descriptive quantitative approach by conducting traffic counting that classified into eleven vehicle types and fuel engines (BBM) in peak hour of three time periods. For CO2 emission calculation, there are five factors to consider: number of vehicles, road length, emission factor, density fuel, and fuel economy. In addition, to determine the relationship between vehicle volume and CO2 emission, the result analyzed statistically using SPSS 28 software. As the result, the highest CO2 emission located on Segments: 6, 5, and 1, with a value range of 1,231.1-3,281.4 kg/hour. Those segments are the longest road among other segments with a difference of 0.4-1 km. Furthermore, there are strength relationship with r coefficient of 0.916 between vehicle volume and CO2 emission. However, three type of vehicle: Jeep, Microbus and Bigbus identified has a negative relationship due to different fuel consumption and fuel density
Flexural Behavior of Reinforced Concrete Beams with Fly Ash Based Geopolymer Strengthening
No full textGeopolymer mortar made from fly ash waste from Steam Power Plant (PLTU) has a higher compressive strength than conventional mortar made from Portland cement. However, geopolymer mortar has a weakness that is brittle. So, it is necessary to add fiber to increase the ductility of the geopolymer mortar. PVA fiber is a synthetic fiber that can be an alternative in geopolymer mortar mixtures, because it has high tensile strength. This study aims to analyze the flexural behavior of reinforced concrete beams strengthened with geopolymer mortar with the PVA fiber addition. The research stages were divided into two, namely compressive strength test of geopolymer mortar and beam flexural test with length of reinforcement of 1500 mm. The compressive strength test of geopolymer mortar used a cube sample measuring 50x50x50 mm which was tested at the age of 3, 7 and 28 days. The beam flexural test used 10 beams with a size of 150x200x3300 mm, consisting of a control beam and the RC beam reinforced with geopolymer mortar (with and without the PVA fiber). The results showed that the addition of 0.6% PVA fiber to the geopolymer mortar increased the compressive strength by 39.23% at the age of 28 days. The application of geopolymer mortar on RC beam strengthening increased the ductility up to 71% compared to the control beam
Low Carbon Emission Development Model with System Dynamic approach in Luwu regency
Full text linkDevelopment of low carbon emissions System Dynamics Modeling that can be done is development in the mangrove sector. One of the forest ecosystems that is quite good at carbon sequestration is the mangrove ecosystem which can store four times more carbon than tropical forests The system dynamics approach is carried out by understanding the dynamic behavior of a phenomenon and identifying changes in mangrove cover and emissions. The method used to see land use changes from year to year is the spatial analysis method, then the data is analyzed using a dynamic system. This research will be conducted in Luwu Regency, South Sulawesi Province. This research was carried out for 2 months, namely October 2021 to November 2021. The results of the analysis revealed that the area of mangrove cover decreased in 2011 reaching 3,014 Ha until in 2020 it reached 1,677 Ha, there are several types of land use that have changed in area, one of which is a decrease in primary dry forest land cover and secondary dry forest and an increase in area in settlements and agricultural land. The results of the model simulation show that in the existing condition the mangrove area in the luwu regency in 2011 was 3,014 ha and in 2020 it was 2,507 ha, based on the BAU, the condition of the mangrove area in 2030 is estimated to be 2,895 ha, in 2045 it will be 2,511 ha and in 2060 it will be 2,199 ha. Analysis of Low Carbon Emission Development in Mangrove Ecosystems in Luwu Regency shows that the proportion of mangrove emission release and absorption reaches equilibrium by 2047 in a fair scenari
Analysis of Groundwater Quality Distribution in Pare-pare Region, South Sulawesi Province
Full text linkAdministratively, the study area is located in the town of Pare-Pare, Pare-Pare Municipality of South Sulawesi Province. Geographically located at coordinates 119°37'04" - 119°38'50" East Longitude and 04°03'10" - 04°25'05" South Latitude. This study aimed to determine the quality of groundwater in the area of research and aims to obtain information about the condition of potable water consumed by residents in the area of research. Water Quality Standards Governor of South Sulawesi Decree 2003, Regulation of the Minister of Health No.492, Ministry of Health 2010 concerning Drinking Water Quality Requirements, and Water Quality Classification and Criteria (Government Regulation No.82 of 2001 article 8) the groundwater in the study area can be classified into several groups (classes) of water that is group (class) A(1) in the sample wells with a record reduction in levels of S01 BOT, group (class) B(2) in the sample wells S03 and S05 to record the reduction in the levels of BOT and Zeng, group (class) C(3) in the sample wells S02 and S04 to record the reduction of levels of BOT, Zeng, and specifically in the sample wells lead S02, as well as reducing levels of BOT, Zeng, and turbidity levels in wells sample S04. Based on the results of measurements of the depth of the well and then cross-sectional profiles can be interpreted that the direction of groundwater flow in the study area is North Northeastern – South Southwestren Watangpulu namely in areas where water quality up to Bacukiki group (class) C(3) located at an altitude of 50 – 125 meters and water quality group (class) B(2) located at an altitude of 25 – 50 meters and water quality group (class) A (1) located at an altitude of  0 – 25 meter
Shifting of Agriculture to Horticulture in Anantnag District: A Geographical Analysis
Full text linkThe vast area of paddy crop in Anantnag district (Jammu and Kashmir) has been converted for the construction of houses, roads and especially for horticultural purposes. The cultivation of paddy has been an old cultural heritage of Anantnag district as well as for the Kashmir valley as a whole, while the farmers are increasingly finding it less profitable in recent times. The present study used both primary (Survey) and secondary data from different sources with an aim to highlight the issue of diversifying of food crops (Paddy) towards cash crops (Apple) in district Anantnag. The findings from the study reveal that 6908 hectares of agricultural cropped area is shifted towards the horticultural cropped area, as agricultural crops (paddy) have low comparative advantage over horticultural (Apple). Paddy land under surveyed farmers has registered a significant decrease from 330 canals (83.75%) in 2000-01 to 158 canals (40.11%) in 2014-15, therefore showing an absolute change of -172 canals. The primary survey further reveals that 09 (30%) of the respondents says less profit is the main reason behind the shift, followed by irrigation (drought) problems 07 (23.34%) and 14 (46.66%) respondents says both reasons are responsible behind shift of Paddy to Apple cultivation in the region
Classification of Industrial Relations Disputes Settlement in Indonesia: Is it Necessary?
Full text linkThis study aimed to examine the effect of the disputes classification in the industrial settlement system, comparing arrangements according to the perspective of the International Labor Organization, China, Japan, and Kazakhstan, and trying to find the ideal concept of the type of industrial dispute to apply in Indonesia. This research is normative legal research. The approaches used in this study were the statutory approach, conceptual approach, fact approach, and comparative approach. The results revealed that the classification of disputes in the industrial relations settlement system in Indonesia has an impact on the difficulty of the parties in classifying their disputes. Comparative studies were conducted to determine the classification of disputes in international law as well as in China, Japan, and Kazakhstan. The ideal concept that can be offered to Indonesia is the simplification or elimination of the classification of industrial relations to provide dispute resolution by applying the principles of fast, precise, fair, and inexpensive methods. Â
What Could ASEAN Learn about Bankruptcy Law from ASEAN Partner Countries, China and Japan?
Full text linkBy 2021, Japan will have the third-largest economy in the world, behind China, which is currently the world's second-largest economy. China accounts for 17.9% of the global gross domestic product (GDP), while Japan accounts for 5.4 percent. In 2022, the Association of Southeast Asian Nations (ASEAN) and Asia Pacific countries, such as Australia, will establish the RECP (Regional Comprehensive Economic Partnership), becoming the world's largest free trade area cooperative bloc. On the other hand, it brings within several investment risks. Undertakings succumbing in the financial hardships or financial default will be manifested. Diverse legal systems result in different approaches to resolving defaulted businesses. For businesspeople, this disparity in the legal system creates legal uncertainty. The goal of this study is to describe how the bankruptcy system works in RCEP member countries and what ASEAN nations may do to improve their bankruptcy laws. The normative legal method is used in this study. This method compares the legal systems of the top ASEAN countries and other RCEP members. This analysis concludes that ASEAN bankruptcy legislation can be improved by using current systems from other ASEAN and RCEP nations. When faced with bankruptcy, the consistency of regulations is supposed to give legal certainty for corporate actors. This will also provide investors from other countries with a sense of security
Judicial Control over Administrative Discretion in Iraq
Full text linkDiscretionary powers allow administrative authorities to fulfil public interest through their flexibility to act in circumstances not anticipated by law. Yet, in Iraq discretionary power remains contentious as it may undermine individual rights. This article examines the concept of discretionary powers, particularly how Iraq's administrative authorities exercise such powers and the role of Iraq's administrative judiciary in reviewing any administrative decisions. Analysis of material from primary and secondary sources reveals that Iraq's legal system permits administrative authorities to exercise broad discretionary decision-making powers. This precipitate abuses. Further, the restriction of Iraq's administrative judiciary and the absence of suitable legislation prevent administrative court judges from effectively curbing administrative arbitrariness. Legal transformations are necessary to streamline the scope for discretion by requiring Iraq's administrative authorities to provide reasoned decisions and better empower the administrative judiciary to check the administration's arbitrariness. As well, judges need more training on the operations of administrative courts
A Review: Efficiency Of Nanocrystals And Nanofibrils Cellulose As Reinforcing Element In Composite Films Productions
Full text linkCellulose nanocrystals and nanofibrils are nano-sized cellulose obtained by top-down approaches such as isolation and extraction both by chemical and physical methods. Due to the abundance, high-strength, and high-stiff properties of nanocrystals and nanofibrils, they can be used as reinforcement for composite films. This review aims to demonstrate the efficiency of cellulose nanocrystals and nanofibrils as reinforcement for composite films based on the mechanical properties, surface wetting, and crystallinity of the resulting composite films. The method used is to find articles related to the use of nanocrystals and nanofibrils as reinforcing elements on online journal website pages, there are 10 articles used that are related in this review. The result of this literature review is that the use of nanocrystals and nanofibrils for composite film reinforcement can be said to be effective. Based on the composite films formed, almost all types of composite films have high mechanical properties, better surface wetting, and higher crystallinity than without the addition of nanocrystals and nanofibrils as reinforcement composite film. Therefore, this paper can provide information on the effectiveness of nanocrystals and nanofibrils as reinforcement in composite films so that these composite films can be further utilized to make good materials
24Technical Analysis of Tambak Lorok Traditional Fishing Vessel Which has a Length of 5.5 Meters
No full textThe majority of traditional fishing boats in the Tambak Lorok area are still built traditionally. Their knowledge is still derived from the benchmark of hereditary inheritance which allows for differences in characteristics from a technical point of view when viewed from an academic perspective. Therefore, it is necessary to review from the academic side by analyzing technical aspects which include resistance, stability, and ship motion. Before the analysis is carried out, conduct direct interviews with fishermen in Tambak Lorok and take measurements of the vessels to obtain some data. Furthermore, the data is inputted using the Maxsurf Modeller software to obtain the hull form model. Then analyze from a technical point of view including resistance, stability, ship motion using software Maxsurf Resistance, Maxsurf Stability, Maxsurf Motion. From the results of this study, the traditional fishing boat Tambak Lorok has a resistance value of 0.6 kN at a speed of 7 knots, has a fairly good stability value seen from the results that still meet the criteria determined by IMO, the ship's motion still meets the Tello 2009 standard which determined with the largest value for rolling at a speed of 0 knots and 7 knots at a heading angle of 900 at 4.54 deg, and the largest pitching value at a speed of 7 knots at a heading angle of 0â° at 2.77 deg.Â