bluuebunny/crossref_metadata_2025_split huggingface dataset:
Investigation of carbon monoxide (CO) concentrations on roads in the city of Makassar
Authors: Zakaria R , Aly S H , Hustim M , Bakhtiar N F 
Published: October 2020

Abstract
Air pollution has long been and is still a problem for humans and the environment, a priority in countries with high vehicle rates. The contribution of gas released reaches 60-70%. Motor vehicles produce one of the pollutants, namely Carbon Monoxide (CO) gas. This research was conducted to determine the level of CO concentration results from sampling using impinger and prediction models using Caline4 software. The results of the concentration between direct measurements with the Caline4 model were then compared. This research was conducted in three streets for three working days namely Jl.Urip Sumoharjo, Jl.Talasalapang, and Jl.Nusantara. The methodology used is direct measurement using impinger, calculating vehicle volume at each measurement point, and analyzing CO concentrations using Caline4. The results of sampling showed the highest CO concentration on Jl.Urip Sumoharjo at 5.80 ppm, Jl.Talasalapang at 1.06 ppm, and Jl.Nusantara 1.15 ppm. The highest estimation results of CO concentrations with Caline4 on Jl.Urip Sumoharjo were 5.7 ppm, Jl.Talasalapang by 1.1 ppm, and Jl. Nusantara was 1.4 ppm. High or low CO concentration value depends on vehicles volume, for instance, CO concentration increases with increasing vehicles volume. In addition, it is also depends on the meteorological factor, such as, the faster the wind increases, the faster the pollutants will increase. Then compare the results of CO impinger concentration and Caline4 using the t-Test to see the difference of the two CO concentrations. Comparisons were made using the t-Test to meet the t-stat < t-critical concluded that there was no significant difference between the two CO concentrations.
Flume experiments on woody debris accumulation at the bridge pier during flood
Authors: Maricar Muhammad Farid , Maricar Farouk 
Published: October 2020

Abstract
Woody debris accumulation at some bridges during the flood. It is found that the source of the woody debris are transported log from the mountain river during the heavy rain. The purpose of the present study is to analyze the woody debris accumulation phenomena in the flume experiments. The experiments shows that the percentage of trapped wood pieces increased with the number of the released wood pieces. The water depth profile also shows that the backwater rise are increased with the number of trapped wood pieces. Moreover, it is shows that the flood discharge have more significant backwater rise compare to the the lower discharge.
Thermal and electrical properties on three basic planes of Mangium wood (Acacia mangium Willd) with different trunk position
Authors: Irzaman  , Lestari A S R D , Sadiyo S , Nugroho N , Wahyudi I , Nugraha D R , Ohorela N A , Putri N , Mubarok M , M N S , Nababan M Y S , Sejati P S , Lestari A T , Efendi M , Solikhin A , Hendrik J , Aziz A A A , Hadyan  , Aminullah  
Published: October 2020

AbstractWood was very complex lignocellulose materials due to its anisotropic property. In this work, the objective was to analyze and determine the effect of wood orientation ofAcacia mangiumwood on thermal and electrical conductivities, dielectrical constant and impedance property by using Stefan Boltzman method. The results showed the relationships between thermal and electrical conductivities inAcacia mangium. The highest thermal conductivity value was in the cross section plane at the bottom of the tree. In contrary, the highest electrical conductivity value was in tangential plane. These differences were expected due to anisotropic property of wood which is influence thermal and electrical properties.
Detection of lead (Pb) heavy metal in snakeskin gourami (Trichopodus pectoralis) meat in Lake Tempe, South Sulawesi
Authors: Ramadhani A A N , Kholilullah Z A , Arifah S , Purwanto E , Omar S B A 
Published: October 2020

Abstract

Trichopodus pectoralis is a type of freshwater fish member of the gourami family found in Lake Tempe. This fish can be found in the central part of Lake Tempe, known as the Pacok Balanda area. In the fisheries sector, pollution can occur in aquatic organisms due to heavy metals that pollute the waters. Meat is one part of fish that cannot be separated from the influence of heavy metal pollution, which will cause toxic effects if present in the body of a living creature and exceeds its threshold. This study aimed to determine the lead (Pb) heavy metal deposits in snakeskin gourami fish meat (T. pectoralis) in Lake Tempe. The research used nine T. pectoralis fish with a body length of 12 to 18.3 cm with an average of 15.32±1.75 cm and a bodyweight of 28 to 82 g with an average of 54.55±18.02 g. Measurement of Pb levels in fish meat used the Atomic Absorption Spectrophotometer test method. The results showed the presence of Pb deposits in T. pectoralis fish meat at Lake Tempe with levels ranging from 0.55 to 14.45 mg/kg. This study showed that Pb content in T. pectoralis fish meat in Lake Tempe was above the standard limit of metal contamination
Torsional beam analysis subjected to static load on offshore structure deck
Authors: Kaba Gilbert Eric , Rachman Taufiqur , Alie Muhammad Zubair Muis 
Published: October 2020

Abstract
The jack-up is one of the fixed typical offshore structures consists of many elements such as beams, plates, braces and so on. Those elements play an important role to strengthen the structure locally and globally from internal and external loads. Such kind of loads eventual act on element like beam and make torsionally. This phenomenon must be analyzed because the beam is connected to other element. The objective of the present study is to analyze the torsional beam subjected to static load on offshore structure deck. The jack-up structure particularly beam element located on the deck is selected to be analyzed. Two cases of beam model are taken. The numerical method is performed to analyze the beam. The result obtained by numerical method for two beam model si compared with one another.
Structural response analysis of jack-up during system jacking lifting process
Authors: Purba Rian Burnang , Juswan  , Alie Muhammad Zubair Muis 
Published: October 2020

Abstract
One of the offshore structures which may be categorized as a column structure where the axial compression and lateral pressure take place is jack-up. The internal and external loads make the structure becomes deformable, leading to failure. For this reason, the structure must be analyzed for the internal and external response. In the present study, the structural response analysis of the jack-up structure during the system jacking lifting process is conducted using a nonlinear finite element method for three cases of the conditions to be analyzed for the structural response. The result obtained by nonlinear finite element is presented in terms of stress and deformation.
The analysis of 2D frame structure subjected to point load
Authors: Arafat Andi Muhammad Alfian , Suci Indah Melati , Alie Muhammad Zubair Muis 
Published: October 2020

Abstract
The offshore structure, like the jacket, jack-up, gravity, and tower, can be categorized as a column structure subjected to vertical or horizontal load, i.e., the structure is identic with the frame structure. Those structures may be idealized as a frame structure with axial or lateral loads acting on the braces. The present study focuses on the analysis of the 2D frame structure subjected to point loads. The support conditions are fixed and hinged at the bottom joint. The point loads of 1 Ton are applied at the vertical and horizontal braces of the frame structure. All point loads are applied in the middle of the brace, either on a horizontal brace or vertical brace. The breadth and depth are 1 m and 1 m, respectively. The result obtained by the numerical method for three models is compared in terms of support reactions, joint displacement, and deformation.
Production scheduling using heuristic pour algorithm, branch and bound, and Nawaz Enscore and Ham (NEH) methods application in Butsudan industry
Authors: Indah A B R , Asmal S , Mangngenre S , Istiqa T N 
Published: October 2020

Abstract
Butsudan production companies have a major problem, namely that the production process has been delayed so that it is difficult to meet production targets on time. The problem is because the scheduling system used is not optimal. Based on these problems, the purpose of this study is to minimize the makespan value by determining the right sequence of jobs. In this study, the method used is the Heuristic Pour Algorithm, Branch and Bound, and NEH. Based on the results of the calculation using the company method, the makespan is 9.958,4 minutes, and the Heuristic Pour method is obtained by the makespan value of 9.461,1 minutes with job sequence J3-J2-J1-J4, the Branch and Bound method obtained by the makespan value of 9.717,3 minutes with job sequence J3-J1-J2-J4, the NEH method obtained the makespan result of 9.846,5 minutes with job sequence J2-J4-J1-J3. So using the proposed method can minimize makespan by 111,9 minutes to 497,3 minutes or about 8 hours.
Shaping and maintaining anti-littering behavior of the community in Indonesia
Authors: Dhahir Darman Fauzan 
Published: October 2020

Abstract
Littering behavior of the community is blamed as one of the causes of waste problems in Indonesia. Many efforts have been conducted, but unfortunately, the effects were sometimes not optimal or only successful temporarily. The current study was conducted using the literature review method to find a solution to this problem. The results indicate that to form anti-littering habits, it is necessary to increase knowledge, and correct perceptions about waste, establish communication, and collaboration of all stakeholders, set role models in action, law enforcement, environmental engineering, supervision, and provision of facilities. Meanwhile, to overcome the effects that are not yet optimal, collaboration and integration among all stakeholders and their policies need to be set. Combined problem solving, and quick responses are also needed. Besides that, to realize the sustainability of the program’s positive effects, stakeholders are encouraged to carry out sustained advocacy as well.
The dynamics of shoreline changes concerning the existence of mangrove in Takalar Regency
Authors: Inaku Dwi Fajriyati , Nurdin Nurjannah , Satari Dewi Yanuarita 
Published: October 2020

Abstract
Coastal is an area that vulnerable to change, especially along the shoreline. The changes can occur in the form of abrasion and or accretion. Many factors could be the causes of shoreline changes; one of them is the existence of a mangrove ecosystem. Physically, the function of the mangrove ecosystem is to protect the coastal area from the wave, which can cause an abrasion. It also functions as a sediment trap, which leads to the accretion. The aim of this research is to know the relationship between the existence of mangrove and the shoreline changes along with the Takalar Regency. This research was comparing two years of Landsat Imagery (1998 and 2018) to map the mangrove and the shoreline. The shoreline changes were analyzed using the Digital Shoreline Analysis System (DSAS) application. Meanwhile, the mangrove density was analyzed using the Normalized Difference Vegetation Index (NDVI) analysis. Results show that for 20 years, shoreline changes caused by abrasion was 147,03 m or 7,38 m/year, and changes caused by accretion was 135,34 m or 6,79 m/year. Mangrove area has increased 63,76 Ha along the Takalar Regency shoreline during these 20 years. The relationship analysis between shoreline changes with mangrove density was done using regression analysis. The coefficient regression shows a positive relation, which means there were influences between shoreline changes and mangrove density, but the significant value was 0,25, bigger than 0,05, which indicates there is another significant factor that is more affected the Takalar Regency shoreline beside the mangrove density.
Analysis of actors in the management of Lantebung mangrove ecotourism, Bira village, Tamalanrea district, Makassar city
Authors: Kurniawan M A , Yusran Y , Sabar A 
Published: October 2020

Abstract
Lantebung mangrove ecotourism area has now been designated as a conservation and protection area for coastal ecosystems. The management of the Lantebung mangrove ecotourism area is inseparable from various parties, both from the government and the community around the ecotourism area, to support the success of mangrove ecotourism management. This study aims: to determine the role and interests of each actor in the management of the Lantebung mangrove ecotourism area. The data collection method is used in three stages, namely: snowball samplin method, data triagulation and data verification is done by content analysis. The data analysis stage of this research: identification of actors and their roles, analysis of the interests of the actors and mapping of the interests and effects of each actor. The results showed that the actors involved were Jekomala, Lurah Bira, Makassar city tourism office, fishermen group, marine and fisheries service of South Sulawesi, analysis of interests contained in the Green Belt, biodiversity, education and tourism. Mapping the interests and influence of Keyplayers : Jekomala, Makassar city tourism office, context setter: marine and fisheries service, Birah urban village, subject: Lantebung fishermen group.
Introduction of marine ecosystem and conservation as a form of early childhood education: a preliminary study
Authors: Moka W J C 
Published: October 2020

Abstract
Marine environment is one of the world parts that affected by the human activities. Overexploitation, pollution and marine debris are some problems faced globally. The issues are caused by human behaviors and actions, intentionally or accidentally. However, not every person in the world realize the problems in marine environment. The objective of this study is to found out about how far parents were already introduce the marine conservation as early education for the children. The data was collected through questionnaire and analyze with simple math analysis. Results shows that not every parent join in marine conservation program and so do their children. However, most parents were already introducing the marine ecosystem and the importance of marine conservation to their children since early age.
Developments carrying capacity land of settlement in the Suburban of Mamminasata, Maros Regency, Indonesia
Authors: Asfan L M , Afandi M F , Rismayanti  
Published: October 2020

Abstract
The growth of Makassar city as a national activity center of Mamminasata Metropolitan produces a high current of urbanization so that development leads to a suburban area which is one of which is in Maros Regency, which functions as the satellite city of Mamminasata. Population growth will certainly require shelter as one of the mandatory needs of the community. The purpose of this study is to determine the carrying capacity land of settlement in the suburban area of Mamminasata, especially the Maros Regency. The method in calculating the carrying capacity of the land is by comparing the supply and demand of settlement land. Land suitable for settlement development is 109,052 hectares, while the need for settlement of land in the next 20 years (2038) is 5,572 hectares. The conclusion of the study is the carrying capacity land of settlement in the suburban area of Mamminasata, which is still in a state of surplus, meaning that there is still a lot of lands that can be developed as settlements in line with the development of new cities in the periphery as anticipation of settlement land needs that cannot be met in Makassar City.
Analysis of water carrying capacity in Pulubala sub-watershed, Gorontalo Regency, Gorontalo Province
Authors: Maulana K M , Lihawa F , Maryati S 
Published: October 2020

Abstract
Government Regulation No. 37 of 2012 mandates that to prevent the decline in the carrying capacity of a watershed, it is necessary to increase the carrying capacity of the watershed. The carrying capacity of a watershed is the ability of a watershed to realize the sustainability and harmony of ecosystems and the increasing use of natural resources for humans and other living things in a sustainable manner. Minister of the Environment Regulation No. 17 of 2009 mandates that in carrying out the calculation of environmental carrying capacity, there are two carrying capacities that must be calculated, namely the carrying capacity of food and carrying capacity of water. Water carrying capacity is the potential contained in water and / or in water sources that can provide benefits or harms to human life and livelihoods and the environment. This study aims to analyze the carrying capacity of water in Pulubala Sub-watershed, Gorontalo District. This research uses the method of calculating the carrying capacity of water through the availability of water and the need for water which is calculated based on the guidelines for the preparation of environmental carrying capacity in the Minister of Environment Regulation No. 17 of 2009, and added with some calculations for the needs of agriculture (rice fields), industry, and animal husbandry. Pulubala watershed covers 4 sub-districts, namely Bongomeme District, Dungaliyo District, Pulubala District and Tibawa District. From the results of the analysis, the carrying capacity of water in Bongomeme District in 2016 was 0.59, in 2017 it was 0.70, in 2018 it was 0.69. Water carrying capacity in Dungaliyo District in 2016 was 0.46, in 2017 it was 0.54, in 2018 it was 0.46. Water carrying capacity in Pulubala District in 2016 amounted to 1.15, in 2017 amounted to 1.34, in 2018 amounted to 1.24. Water carrying capacity in the District of Tibawa in 2016 was 0.51, in 2017 it was 0.62, and in 2018 it was 0.57. The water carrying capacity in the Pulubala Sub-watershed is exceeded (carrying capacity <1) and conditional safety (carrying capacity between 1-2).
Study of wastewater treatment for fulfilment of clean water
Authors: Yudhantoro W A , Martono D N , Utomo S W 
Published: October 2020

Abstract
The problem of the need for clean water is one of the issues that occur in urban areas due to an increase in urbanization from time to time. Jakarta, with the most populous population in Indonesia, causes the need for clean water in this city to increase. The fulfillment of clean water is one indicator of sustainable development. The method of water pollution is generally described by the pollution caused by industrial activities and various types of human activities. Usually, the process of pollution occurs in the form of colour pollution to particulate matter pollution resulting from various activities. Some things in the effort to meet the needs of clean water continue to experience growth. Processing to reuse water into clean water is one of the efforts that can be done. Membrane bioreactor is one method of processing wastewater to get an ideal condition like clean water. This research was conducted to find out how the potential of wastewater that has been previously treated is carried out by another treatment into clean water. The results were based on a literature study to see the potential of the wastewater process to be clean water by using membrane bioreactors.
The Miocene (25.2 – 5.6 million years ago) climate changes recorded by foraminifera and nannofossils assemblages in Bogor Basin, Western Java
Authors: Isnaniawardhani Vijaya , Rivaldy Mohammad , Ismawan  , Sophian Raden Irvan , Andyastiya Annisa Sylvani 
Published: October 2020

AbstractThe Miocene composite sections reveal that a bathyal to the inner neritic setting (20 - 500 m sea level depth) was being filled dominantly by fine siliciclastic, which deposited in fluctuate of warm to a temperate climate. The quantitative data of total abundancy, species number, marker species ratio, shell coiling direction ratio and size guided to sea surface temperature realms. The warm zone was determined based on high total abundance and diversity, a high frequency of foraminifera and nannofossil tropical marker species, dominated by dextral coiling direction, and relatively big size-specific foraminifera taxa. On the contrary, warm temperate zones were identified by lower total abundance and diversity. In the lower part, the sediments contain medium to high -abundance and -diversity of foraminifera as well as nannofossil assemblages indicated a warm climate at the Earliest Miocene (25.2-24 Ma). The low -total abundancy and -species number that indicates a decrease in temperature were recorded until the earliest Middle Miocene (24-20 Ma). The dominance ofOrbulinagroup with a high frequency of tropical species marker (Globoquadrina altispira, G. globosa, Globigerinoides trilobus, G. sacculiferusandDiscoastergroup) indicated significant increase in temperature. The optimum of total- and individual- abundance along with the dominated of big size-Orbulina,increased tropical foraminifera, and nannofossil species markers indicate a warm climate at Middle Miocene (16-13.8 Ma). The decreased dextral relative shell coiling ratio ofGloborotalia menardiiandGloborotalia acostaensis,abundance and diversity of assemblages or taxa markers that indicate the temperature decrease is recorded in Late Miocene interval several times. An increased number ofCalcidiscus leptoporus, Coccolithus pelagicus, Discoaster challengeri, D. variabilis, andHayaster perplexus, the less -total abundance and -diversity indicated a warm temperate climate (10 to 6.2 Ma). It is considered to correlate with the global glaciation period.
Roles of waste pre-treatment unit to support waste to energy sustainability
Authors: Yuliani M , Utomo S W , Wahyono S 
Published: October 2020

Abstract
Improper waste management in big cities, especially DKI Jakarta, causes increasing the burden of the landfill so that it becomes full quickly. It is very troublesome to find land for a new landfill because there has been a lot of land use as residences. The result is an increase in the amount of waste that is discharged outside the landfill causing environmental damage and danger to human health. Waste processing with using thermal technology (Waste to Energy/WtE) is one alternative to overcome these problems. Since the condition of waste in Indonesia is mixed waste and most types of waste are organic waste, it is necessary to pre-process waste before waste enters the incinerator. The waste pre-treatment unit has any significant roles in the sustainability of WtE. There have not been many previous studies that explain this role. The purpose of this paper is to study the significant roles using the study of literature. These roles include: 1) improve the waste quality that will enter the incineration process; 2) reduce the Plant capacity so that it can reduce the WtE’s total costs; 3) facilitate waste hierarchy approach in WtE Pilot Project activities.
The effect of the addition of mangrove wood charcoal to reduce sulfur content in coal
Authors: Rahman R , Widodo S , Azikin B , Tahir D 
Published: October 2020

Abstract
Coal in Sulawesi, especially in South Sulawesi, has several shortcomings since it contains sulfur and produces a high ash content that affects the environment. Desulphurization with High-Temperature Combustion Methods is a sulfur content analysis method using the SC-144DR Dual Range Sulfur Analyzer coal tool, which is one of the methods used to reduce sulfur in coal. Based on the results of the study, it was obtained: a mixture of coal with mangrove wood charcoal with the composition of 25% Sin coal + 75% MWC = 0.067% sulfur content, 50% Sin coal + 50% MWC = 0.089% sulfur content and 75% Sin coal + 25% MWC = 0.107% sulfur content. These results indicate that the more addition of mangrove charcoal, the lower sulfur content in the coal. Decreasing sulfur content can improve the quality of the coal produced, especially in combustion systems that affect the environment.