bluuebunny/crossref_metadata_2025_split huggingface dataset:
The analysis of strength for lightweight concrete brick with adding solid crude palm oil
Authors: Hamidi A , Haniza S , Yudi A 
Published: April 2021

Abstract
The use of lightweight brick as a wall of a building is one alternative to be able to reduce the weight of a building. The lightweight brick used is a combination of cement, sand, water, and other materials that can make the brick lighter. Along with the development of the era of light brick making, it was developed by combining with the material in the form of waste. One waste that can be used is solid for oil palm. Solid is silt from the rest of the process of making palm oil. This solid existence if not utilized properly will become an environmental problem and also affect the health conditions of people around them. The texture of the solid is like the ground when it is dried in an oven and can be fused with mortar and water in a lightweight brick. The use of solid as additional stirring material in lightweight bricks is with variations of 0%, 0.5%, 1%, 1.5%, 2% and 2.5% by weight of cement. The use of solids on a lightweight brick mortar can give a compressive strength of 0.545 MPa for a variation of 0%; 0.415 MPa for variations of 0.5%; 0.915 MPa for variations of 1%; 1.985 MPa for variations of 1.5%; 0.879 MPa for 2% variation and 0.813 MPa for 2.5% variation, and the optimal variation is 1% variation with compressive strength of 1.985 MPa.
Visual therapy through the application of plants and design elements in landscape
Authors: Krisantia I , Faris S , Sazwani S 
Published: April 2021

Abstract
This paper will explore how visual therapy can help to reduce stress through the use of plants and appropriate design elements. Urban residents in general are experiencing mental stress due to life pressure. With limited usage of the green spaces, the visual landscape has become more significant in how parks can be enjoyed by users while maintaining safe social distancing. One of the functions of using plants in landscape design is as visual therapy to tackle the mental stress problems. Other than plants, applications of basic design elements may help to contribute to the positive properties of the visual landscape. Literature review was used to cover the subject of visual therapy in the landscape. The results have shown that: i-‘visual natural element’ gives a positive impression of the soul and creates a feeling of calmness, ii-visual characteristics of the plant such as form, colour and texture contributed to the effect of therapy in the landscape. The results from this study may help to highlight the importance of landscape as a form of visual therapy after Covid-19 and the highlighted characteristics of the plants and design elements may present opportunities for landscape architects to help build more usable green spaces and cities.
Performance testing of Darrieus turbine in hydrokinetic power plant model
Authors: Permatasari R , Hidayat L F , Permana F M 
Published: April 2021

Abstract
Darrieus Turbine is a type of vertical axis hydrokinetic turbine that is often used in hydroelectric power plant. This research aims to performance test of Darrieus Water Turbine in hydro power plant experimentally. Darrieus Turbines uses blades with type NACA 0018 and Polylactic Acid material. In performance test of the Darrieus Turbine, 5 variations of fluid flow velocity are: 0.77 m/s, 0.89 m/s, 0.99 m/s, 1.17 m/s, and 1.25 m/s are used. Also the test uses variations in the number of turbine blades are: 2 pieces, 3 pieces and 4 pieces with 0º, 10º, and 15º angle of attack. The test results obtained the highest rotation at 195.17 rpm with a turbine mounted 2 blades and an angle of attack 0˚, the power generated at the rotation is 0.18 Watt. But the optimal power was obtained 0.1 Watt for 4 blades turbine, because the turbine could to do self-starting at fluids velocity 0.77 m/s for all angle of attack. The optimum result was produced by 4 blades turbine, because the turbine could do self-start at 0.77 m/s water velocity either at 0º, 10º, or 15º. The optimum power was produced by 4 blade turbine, which was 0.1 Watt.
Research tower composter bioactivator using buffalo dung
Authors: Anwar D , Sitorus K , Lumbangaol R , Nainggolan E 
Published: April 2021

Abstract
Buffalo dung is buffalo digestive waste, which can cause problems for the environment and health. The buffalo dung waste contains macronutrients such as nitrogen, phosphorus, calcium, and water which have the potential as bioactivator for the composting process. The composting process using bioactivator from buffalo dung is an alternative utilization of buffalo dung solid waste. This study aims to show the potential of buffalo dung solid waste as a bioactivator in the composting process of organic waste and to obtain degradation data of composting organic waste using bioactivator from buffalo dung. The variables observed in this study were pH, TS, TSS, and Moisture Content. This research was started from making bioactivator from buffalo dung, then continued the composting process by putting organic waste into the tower composter while adding bioactivator until the water content reached 55-65%. Results the study found that the pH, TS, and TSS values in the manufacture of liquid fertilizer from buffalo dung were 4.28; 17.68 ppm and 6.9 ppm. Composting carried out for 20 days showed that the bioactivator of buffalo dung was able to influence the composting process, namely moisture content 50.23%.
Evaluation of waste management in tourism area of Luar Batang Village, outside area of the Historic Old Jakarta Kota, Penjaringan District, North Jakarta
Authors: Abbas I F , Purwaningrum P , Indrawati D 
Published: April 2021

Abstract
Penjaringan Subdistrict is included in the tourism area of the Historic Old Jakarta Kota outside area which is a community based historical cultural tourism center with an area of ±19 Ha, consisting of 7 cultural heritage buildings. One of the cultural heritage buildings in the tourist area outside the walls of the old city is the area outside the stem area. In this tourist area there is a historic worship building in the form of a mosque. Increased tourist visits can cause problems on regional scale waste management caused by waste from tourist activities. This study aims to evaluate the existing conditions of Waste Management in Tourism Area of Luar Batang Village Outside area of the Historic Old Jakarta Kota and waste management facilities starting from source to landfill. This research was conducted through the measurement of waste generation and composition based on SNI 19-3964-1994 as a method of taking and measuring samples of urban waste generation and composition. The results of this study indicate that the generated waste is 28.5 kg/day or around 0.216 m3/day. The composition of waste in the tourist area of Luar Batang Village, Outside Area of the Historic Old Jakarta Kota shows that the biggest physical component of waste is organic with an average daily percentage of 83.30%, plastic waste of 4.05% (PET), 3.37% PP waste, and 6.40% for LDPE, as well as Styrofoam waste of 2.46%, in addition to the waste cans the trash with a percentage of 1.55% and cardboard waste of 1.43%.
The effect of mixing speed and contact time on dye removal using Cassava Peel adsorbents
Authors: Aulia S D , Wijayanti A , Hadisoebroto R 
Published: April 2021

Abstract
The screen printing home industry generates wastewater causing dangerous environmental pollution since it has heavy metal contents. Cassava peel is one material that can be activated and used as an adsorbent to treat the wastewater. This study aims to analyze the effect of mixing speed on dye adsorption using cassava peel waste in a batch reactor and mixed by the jar test device. In the process of making adsorbents, cassava peel was dried and carbonized in a furnace into a powder, and then it was activated using H2SO4 solution. Wastewater was contacted with the 10 gr of adsorbent then mixed in variation speed of 50, 100, 150, 200, 250 rpm and variation contact time of 30, 60, 90,120, 150 minutes. The maximum removal of 96.78% was observed in the mixing speed of 100 rpm over the 60 minute contact time. It could be concluded that organic waste such as cassava peel is a great adsorbent and resolves color pollution in the environment.
The effect of mixing speed and contact time on the process of dye adsorption using corncobs adsorbent
Authors: Pramesti K A , Kusumadewi R A , Hadisoebroto R 
Published: April 2021

Abstract
The home screen printing industry generally discharges wastewater directly into drainage without being processed first. By utilizing corncobs waste will reduce the amount of waste in the environment. The purpose of this study is to find out the optimum removal efficiency using corncobs in the removal of dyes. The manufacture of adsorbents using corncobs was dried and carbonized using a kiln to become charcoal powder. After the carbonization process, activated it using H2SO4. The dye adsorption process was carried out with variations in speed of 50, 75, 100, 125, and 150 rpm, variations in contact time of 0, 30, 45, 60, 90, and 120 minutes. From the results of this study it was found that the optimum conditions with a dye removal efficiency of 99.98% were obtained when the mixing speed was 100 rpm, contact time was 60 minutes, and the adsorbent dose was 10 g / L. From these results it can be said that the corncobs adsorbent is effective in removing the screen printing wastewater dye.
Characterization of ecotourism destinations in Toba Lake area with the Tourism Area Life Cycle (TALC) method and sustainability analysis
Authors: Manalu L , Manik Y 
Published: April 2021

Abstract
Lake Toba is one of national strategic tourism destinations which is projected to become one of the economic contributing sectors. To make the strategic programs for the sustainability of its development, detailed mapping of its characteristics is needed. This study aims to map the position of 4 destinations in Lake Toba namely Soda Water Natural Pool, Aek Nauli Forest, Tao Silalahi and Sampuran Efrata Waterfall which present the types of ecotourism and its geographical distribution. Mapping was made in the Tourism Area Life Cycle model. Criteria in mapping include attractions, facilities and services, accessibility, image of tourism object and costs or prices. Measurement of criteria is done by conducting a survey of 120 respondents representing four kinds of stakeholders are private owner, Department of Tourism, research institution and local community. The result of this study is presented that the destination of Soda Water Natural Pool is in the exploration stage, Aek Nauli Forest is in the involvement stage and Tao Silalahi and Sampuran Efrata Waterfall are in the stagnation stage. The position in tourism life cycle will be the basis in making development strategies of ecotourism in Lake Toba Area.
Analytic hierarchy process for zonation review of Sembilang National Park, Banyuasin Regency, South Sumatera Province, Indonesia
Authors: Ratmoko I A , Budianta D , Ridho R , Wildayana E , Idrus Z , Nuryamsasni N 
Published: April 2021

Abstract
Sembilang National Park is one of the largest wetland conservation areas in Indonesia. As a conservation area with the main ecosystem in the form of approximately 91.679 hectares mangrove ecosystem in 2003. Sembilang National Park is managed based on a zoning system that is utilized for research, science, education, supporting cultivation and tourism. At present, the zoning of Sembilang National Park consists of core zones, jungle zones, utilization zones, traditional zones, rehabilitation zones and special zones. The predetermined zones need to be evaluated because the damage to the national park is continuing, so that the primary mangrove forest area in Sembilang National Park has shrunk from 83.447 hectares in 2009 to be 70.263 hectares in 2017. The Purpose of this study is to determine the zoning of Sembilang National Park by using the analytical Hierarchy process (AHP) method. The results showed that the main criteria in determining national park zones based on ecological aspects were the presence of peat domes, typical of soil and land cover conditions. While the right social indicators are access to conservation areas and the existence of settlements.
Optimaizing nozzle position on an evaporator of absorbtion system cooling machine
Authors: Sepfitrah S , Zaiyar Z , Machdalena M 
Published: April 2021

Abstract
This study examines the refrigerant jet spraying system that has been mounted on the absorption system cooling machine and is optimized using a CFD (Computer Fluid Dynamic). The study was conducted on an absorption system cooling machine that had been built using an arbsorber system in the form of a LiBr-H2O solution. As an efrigerant, water circulated in the tube bundle is used. Refrigran spray patterns greatly affect the performance of the cooling machine. The more evenly distributed refrigran beam in the space between the tube bundle lattice, the more effective the process of water cooling in the tube. The adjustment of the position of the nozzles and the evaporator grille is very influential in this refrigeration cycle. From the results of the initial conditions simulation of the placement of the nozzles with the arrangement of the tube bundle that there is fluid flow in the space between the lattice is not spread evenly. After being modified using the CFD software, an effective formation of tube bundle arrangement, evaporator lattice, and nozzle position is expected so that the refrigeration cycle is expected to go well.
Linkages between Solo-Selo-Borobudur as the Jawa Tengah Provincial tourism strategic area
Authors: Pinanigas A J , Fatimah E , Ramadhani A 
Published: April 2021

Abstract
Provincial Strategic Areas (PSA) are areas prioritized in spatial planning because of their significantly influence on economy, socio-culture, or environment perspectives. Solo-Selo-Borobudur is designed as one of Central Java PSAs. This PSA is expected to become a tourism corridor area and the sub areas within the PSA are expected to be equally developed and integrated as a single entity. In fact, there is a significant difference in the number of tourists visiting the three areas, which indicates an imbalance in the level of development. This study aims to examine the level of development of each sub-area and to identify the level of linkages between them in terms of their activities. The scoring method was used to identify the level of development in terms of attraction, accessibility, amenities and ancillary services (4A) aspects. A questionnaire survey was also conducted to explore tourism behaviour in order to identify linkages between the three tourism areas. The data obtained is analyzed by using spatial descriptive method. The result of this study shows the level of development of Solo and Borobudur tourism sub-areas can be classified high level, while Selo is still low (undeveloped). The study also found that the linkage between Solo - Borobudur tourism activities was stronger than between Solo - Selo and Selo - Borobudur. As the PSA, the linkage between the three tourism areas is still low. The findings are expected to be related to differences in the level of development between the three areas.
Effect of distance of housing to airport on noise disturbances level (case: housing around Soekarno-Hatta International Airport)
Authors: Wigatiningrum R , Wiranegara H W , Luru M N 
Published: April 2021

Abstract
This study aims to identify the effect of distance of housing to the airport on the level of noise disturbance. The airport is an area of land or water with certain boundaries that used as a place to landing and take-off. As a vital and dynamic object, the airport’s surrounding has to accommodate its future developments and keep secure by keeping away from residential areas. And vice versa, for the convenience of its residents, these housings need to be regulated at a minimum distance from the airport. Its residents will be affected by noise due to aircraft traffic activity. Noise is unwanted sound at a certain level and time causing interference. Soekarno-Hatta International Airport was chosen considering the high intensity of aircraft traffic with large aircraft dimensions and high noise interference. Dimensions of noise disorders studied include physical disorders, communication disorders, sleep disorders, disruption of activity, and emotional disorders. This research is quantitative using a survey-questionnaire method. The number of samples was determined using the Lemeshow formula of 96 respondents. The results show that the effect of distance on the noise disturbance level for all the dimensions mentioned above is significant. This result emphasizes the need for a minimum distance limitation between housing and the airport.
Locational choice strategy: How FDI’s choice of Indonesia as an investment location towards competitiveness advantage
Authors: Wartaman A S , Kusumadewi D , Ramadhani A , Andajani R D 
Published: April 2021

Abstract
Globalization causes the world to appear flat without borders. Currently, business actors have the freedom to choose investment locations that can increase vantage for the company. This paper aimed to bring insight into Foreign Direct Investment (FDI)’s decision in relocating to Indonesia and the impact towards the company’s performance. The research approaches are: 1) imitating referenced companies, and 2) supply chain as variables in the selection of investment destination. This study was done in quantitative method. The population of this study was FDI companies in Jababeka Industrial Area. Partial Least Squares-Structural Equation Modelling (PLS-SEM) was chosen in statistical data processing stage. This study concluded that (i) FDI is likely to ignore imitating approach in choosing Indonesia as investment location (ii) Supply chain becomes the main consideration of FDI in choosing Indonesia as investment destination, (iii) agglomeration of similar FDI is likely to benefit organizational competitiveness and (iv) FDI that choose Indonesia as investment destination using supply chain approach gains an advantage of higher organizational competitiveness.
Activity characteristics of street vendor in royal market area, Serang City
Authors: Riani R D , Situmorang R , Supriatna Y 
Published: April 2021

AbstractThe purpose of this study is to examine the characteristics of street vendors, as the basis of directions for arranging street vendors in Royal Market area, Serang City. The problems often encountered by street vendors is unclear rules and law enforcement. Its also found in the Royal Market Area, as the center of a shopping district in the Serang City. The location and number of market visitors is an attraction for street vendors to do their business. Street vendors run their activities by utilizing public access to suffice the needs of life and also has a potential to providing a job opportunities. Even, if the space used for street vendors can be arranged properly, it can increase the Regional Original Revenue of Serang City. This study used a quantitative approach with survey methods, and supported by statistical-descriptive analysis techniques. The results of this study indicate that the characteristics of street vendors are dominated by street vendors who use a physical means such as the covered carts that street vendors use trade are, in theory, permanent and usually sell food and drinks, however in the Royal Market Area covered carts are used by street vendors to sell textile goods and accessories.
Place attachment in supporting the preservation of religious historical built environment
Authors: Wahyudie P , Antariksa A , Wulandari L D , Santosa H 
Published: April 2021

Abstract
The place attachment theory is a scientific part of the relationship between human behavior and built environment study. The built environment study explains the existence of a building and its landscape. The place attachment theory has been used in studying the relationship between human behavior with a religious and historic environment during its development. However, nowadays, this research rarely conducted and often carried out partially. As a consequence, the result analysis is only partially. This study proposed a holistically place attachment to provide a broader discourse in examining the relationship between human behavior and the built environment holistically. Moreover, place attachment theory will be used to preserve the historical religious built environment. In addition, the literature review from the previous studies and discussion methods are essential to support the research. The result shows that there is an opportunity to conduct a study of place attachment theory in supporting the preservation of the historical religious built environment. Thus, the holistic result can be obtained using the place attachment theory, which is the combination of place identity, place dependence, place affect, and place social bonding.
Analysis of soil subgrade bearing capacity for clay using laboratory testing data
Authors: Putri L D , Hakam A , Thamrin R , Yossyafra Y 
Published: April 2021

Abstract
Road construction failures are often caused by unsupported subgrade classification. The purpose of this study was to determine the bearing capacity of subgrade on clay using test data in the laboratory. The contribution of this study can later be a recommendation in the use of subgrade types of clay and alternative uses. One of the properties of land strength associated with roads in the California Bearing Ratio (CBR). The method used is soil physical testing and CBR testing. The soil sample used was undisturbed soil in the subgrade in Minas District, Siak Regency, Riau Province. The result showed that the clay studied was non-organic Sandy Lean Clay CL) with low plasticity based on the USCS classification table. 2.681 specific gravity, water content 29,94%, liquid limit 33.64%, plastic limit 23,67% and plasticity index 9.97%. Soaked CBR test results obtained 4.21% and included in the medium classification. The use of this type of clay soil for subgrade with the bearing capacity of CBR classification needs to be pursued with alternative improvements and soil reinforcement that can increase the CBR value to a minimum of 6%.
The mechanical behavior of mortar cement mixing with palm sugar due to exposed to heat (high temperature)
Authors: Sari N P , Olivia M , Djauhari Z 
Published: April 2021

Abstract
Mortars will suffer damage if exposed to high temperatures. The selection of palm sugar as an added material for building purposes resistant to high temperatures is the aim of this research. This study provides an overview of the effect of high temperatures on mortar behavior. Preparation of specimens using cube mortar with length of 5 cm and carried out treatment at room temperature for 28 days. Mortar will be furnaceat 250°C, 500°C, 750°C for 3 hours. In normal mortar, hair cracks seen at 500°C has seen this fine cracking indicates the mortar has been damaged. For heating temperatures of 750°C the crack size appears larger and deeper, the color of the mortar turns whiter and brighter, mortar has suffered severe damage. Mortars containing palm sugar 0.1%, 0.3% and 0.5% of the weight of cement did not experience cracking at 75°C, but only visible increase in pore size. The pore size is enlarged due to the gas pressure coming out of the cement matrix due to heating. Mortar with additional palm sugar still has a compressive strength of 50% at high temperatures 750°C.